The aromatic compounds,including o-xylene,m-xylene,p-xylene,and ethylbenzene,primarily originate from the catalytic reforming of crude oil,and have a wide variety of applications.However,because of similar physical an...The aromatic compounds,including o-xylene,m-xylene,p-xylene,and ethylbenzene,primarily originate from the catalytic reforming of crude oil,and have a wide variety of applications.However,because of similar physical and chemical properties,these compounds are difficult to be identified by gas chromatography(GC)without standard samples.With the development of modern nuclear magnetic resonance(NMR)techniques,NMR has emerged as a powerful and efficient tool for the rapid analysis of complex and crude mixtures without purification.In this study,the parameters of one-dimensional(1D)total correlation spectroscopy(TOCSY)NMR techniques,including 1D selective gradient TOCSY and 1D chemicalshift-selective filtration(CSSF)with TOCSY,were optimized to obtain comprehensive molecular structure information.The results indicate that the overlapped signals in NMR spectra of nonpolar aromatic compounds(including o-xylene,m-xylene,p-xylene and ethylbenzene),polar aromatic compounds(benzyl alcohol,benzaldehyde,benzoic acid),and aromatic compounds with additional conjugated bonds(styrene)can be resolved in 1D TOCSY.More importantly,full molecular structures can be clearly distinguished by setting appropriate mixing time in 1D TOCSY.This approach simplifies the NMR spectra,provides structural information of entire molecules,and can be applied for the analysis of other structural isomers.展开更多
BACKGROUND This study employs a descriptive phenomenological approach to investigate the challenges anesthesia nurses face in managing emergence delirium(ED),a common and complex postoperative complication in the post...BACKGROUND This study employs a descriptive phenomenological approach to investigate the challenges anesthesia nurses face in managing emergence delirium(ED),a common and complex postoperative complication in the post-anesthesia care unit.The role of nurses in managing ED is critical,yet research on their understanding and management strategies for ED is lacking.AIM To investigate anesthetic nurses’cognition and management experiences of ED in hopes of developing a standardized management protocol.METHODS This study employed a descriptive phenomenological approach from qualitative research methodologies.Purposeful sampling was utilized to select 12 anesthetic nurses from a tertiary hospital in Shanghai as research subjects.Semi-structured interviews were conducted,and the data were organized and analyzed using Colaizzi’s seven-step analysis method,from which the final themes were extracted.RESULTS After analyzing the interview content,four main themes and eight subthemes were distilled:Inefficient cognition hinders the identification of ED(conceptual ambiguity,empirical identification),managing diversity and challenges(patientcentered safe care,low level of medical-nursing collaboration),work responsibilities and pressure coexist(heavy work responsibilities,occupational risks and stress),demand for high-quality management(expecting the construction of predictive assessment tools and prevention strategies,and pursuing standardized management processes to enhance management effectiveness).CONCLUSION Nursing managers should prioritize the needs and suggestions of nurses in order to enhance their nursing capabilities and provide guidance for standardized management processes.展开更多
BACKGROUND Donor-recipient size mismatch(DRSM)is considered a crucial factor for poor outcomes in liver transplantation(LT)because of complications,such as massive intraoperative blood loss(IBL)and early allograft dys...BACKGROUND Donor-recipient size mismatch(DRSM)is considered a crucial factor for poor outcomes in liver transplantation(LT)because of complications,such as massive intraoperative blood loss(IBL)and early allograft dysfunction(EAD).Liver volumetry is performed routinely in living donor LT,but rarely in deceased donor LT(DDLT),which amplifies the adverse effects of DRSM in DDLT.Due to the various shortcomings of traditional manual liver volumetry and formula methods,a feasible model based on intelligent/interactive qualitative and quantitative analysis-three-dimensional(IQQA-3D)for estimating the degree of DRSM is needed.AIM To identify benefits of IQQA-3D liver volumetry in DDLT and establish an estimation model to guide perioperative management.METHODS We retrospectively determined the accuracy of IQQA-3D liver volumetry for standard total liver volume(TLV)(sTLV)and established an estimation TLV(eTLV)index(eTLVi)model.Receiver operating characteristic(ROC)curves were drawn to detect the optimal cut-off values for predicting massive IBL and EAD in DDLT using donor sTLV to recipient sTLV(called sTLVi).The factors influencing the occurrence of massive IBL and EAD were explored through logistic regression analysis.Finally,the eTLVi model was compared with the sTLVi model through the ROC curve for verification.RESULTS A total of 133 patients were included in the analysis.The Changzheng formula was accurate for calculating donor sTLV(P=0.083)but not for recipient sTLV(P=0.036).Recipient eTLV calculated using IQQA-3D highly matched with recipient sTLV(P=0.221).Alcoholic liver disease,gastrointestinal bleeding,and sTLVi>1.24 were independent risk factors for massive IBL,and drug-induced liver failure was an independent protective factor for massive IBL.Male donor-female recipient combination,model for end-stage liver disease score,sTLVi≤0.85,and sTLVi≥1.32 were independent risk factors for EAD,and viral hepatitis was an independent protective factor for EAD.The overall survival of patients in the 0.85<sTLVi<1.32 group was better compared to the sTLVi≤0.85 group and sTLVi≥1.32 group(P<0.001).There was no statistically significant difference in the area under the curve of the sTLVi model and IQQA-3D eTLVi model in the detection of massive IBL and EAD(all P>0.05).CONCLUSION IQQA-3D eTLVi model has high accuracy in predicting massive IBL and EAD in DDLT.We should follow the guidance of the IQQA-3D eTLVi model in perioperative management.展开更多
Objective:Sub-Saharan Africa accounts for 66%of global maternal deaths.In Kenya,362 maternal deaths occur in every 100000 live births.Most of these deaths occur as a result of suboptimal quality care of mothers during...Objective:Sub-Saharan Africa accounts for 66%of global maternal deaths.In Kenya,362 maternal deaths occur in every 100000 live births.Most of these deaths occur as a result of suboptimal quality care of mothers during labor,delivery,or within 24h of delivery.This study explored barriers that nurse-midwives encounter in trying to provide high-quality obstetric care during these periods.Methods:A qualitative research design utilizing focus group discussion as part of a mixed method study was used to find out the participants'experiences.Data were collected between February and March 2022 in the maternity units of two regional teaching and referral hospitals in Kenya.Eligible participants were nurse-midwives in charge of the maternity unit.The discussion was conducted in English,tape-recorded,and transcribed verbatim,Data were analyzed thematically,following Braun and Clarke 6-step framework.Nvivo version 7.0 computer software was used to facilitate this process.Results:Two focused group discussions each involving seven participants were conducted.The participants agreed that maternal mortality due to postpartum hemorrhage and pregnancy-induced hypertension is a major health concern.Further,maternal care in the two hospitals was substandard.Themes that emerged as barriers were:inadequate supplies;inadequate obstetric knowledge and skills;shortage of nurse-midwives,and inadequate support supervision.The underlying factors include inadequate funding by the county government and high staff turnover.Conclusion:This study showed that nurse-midwives are working under very difficult circumstances which are hindering the provision of quality maternal care.This is mainly due to system failures and inadequate nursemidwife numbers.Targeted strategies need to be urgently implemented to mitigate these challenges to improve the quality of maternal health care.展开更多
Background:In crisis intervention sites such as infectious disease disasters,counselors are repeatedly exposed,directly or indirectly,to the traumatic experiences of victims.Disaster counseling has a negative effect o...Background:In crisis intervention sites such as infectious disease disasters,counselors are repeatedly exposed,directly or indirectly,to the traumatic experiences of victims.Disaster counseling has a negative effect on coun-selors,which can eventually interfere with the counseling process for disaster victims.Therefore,exploring and understanding the experiences of counselors is necessary to ensure that qualitative counseling for disaster victims can be continuously and efficiently conducted.Objectives:This study investigated the experiences of counselors who participated in mental health counseling as psychological support for victims of the COVID-19 disaster in Korea.Design:This is a qualitative study.Participants:The study participants comprised 18 counselors who had mental health professional qualifications of level 2 or higher and who had provided mental health counseling for COVID-19 confirmed cases and quarantined persons.Methods:Data were collected using focus group interviews from February 21 to May 29,2021.The duration of each interview was 60–90 min,and the data were analyzed using content analysis.Results:Thefinal theme was“Continuing to walk this road anytime,anywhere.”The par-ticipants’experiences were identified in four sub-themes:“being deployed to unprepared counseling,”“encoun-tering various difficulties,”“feeling full of meaning and value,”and“hoping to become a better counselor.”Conclusions:In order to continuously provide qualitative counseling in case of an infectious disease disaster such as COVID-19,it is important to develop a qualification and competency strengthening program through educa-tion and training to secure the crisis intervention expertise of counselors according to the characteristics of the disaster.In addition,a psychological support manual for each disaster should be prepared at the national level according to the type of disaster.展开更多
There are several shape measures for quantitative variables, some of which can also be applied to ordinal variables. In quantitative variables, symmetry, peakedness, and kurtosis are essential properties to evaluate t...There are several shape measures for quantitative variables, some of which can also be applied to ordinal variables. In quantitative variables, symmetry, peakedness, and kurtosis are essential properties to evaluate the deviation from assumptions, particularly normality. They aid in selecting the most appropriate method for estimating parameters and testing hypotheses. Initially, these properties serve a descriptive role in qualitative variables. Once defined, they can be considered to check for non-compliance with assumptions and to propose modifications for testing procedures. The objective of this article is to present three measures of the shape of the distribution of a qualitative variable. The concepts of qualitative asymmetry and peakedness are defined. The measurement of the first concept involves calculating the average frequency difference between qualitative categories matched by frequency homogeneity or proximity. For the second concept, the peak-to-shoulder difference and the qualitative percentile kurtosis are taken into consideration. This last measurement is a less effective option than the peak-to-shoulder difference to measure peakedness. A simulated example of the application of these three measures is given and the paper closes with some conclusions and suggestions.展开更多
Background: Nurses are expected by their international code of ethics to advocate for patients to enhance safety and quality care. However, there is a limited understanding regarding the implications of specific patie...Background: Nurses are expected by their international code of ethics to advocate for patients to enhance safety and quality care. However, there is a limited understanding regarding the implications of specific patient advocacy outcomes experienced by nurses who advocate for patients in the hospital context. Purpose: This study explored the implications of patient advocacy outcomes experienced among practicing nurses in the hospital context. Methods: A qualitative, descriptive study design was utilized. Data was collected through purposive sampling and an in-depth semi-structured interview of 25 Registered Nurses in an acute care hospital. An inductive qualitative content analysis method was used, and the SRQR guidelines for reporting qualitative studies were followed. Results: This study revealed that nurses who succeeded in advocating for patients experienced feelings of happiness, increased confidence levels, increased work output, and job satisfaction. However, nurses who failed to succeed in advocating for patients experienced physical, emotional, and psychological consequences, which contributed negatively to the quality of patient care. Therapeutic communication and nurses’ commitment to intervene for patients emerged as vital qualities and skills required to succeed in the patient advocacy process. Conclusions: This study showed that patient advocacy has advantages. However, when nurses fail to succeed in their attempt to advocate for patients in clinical practice, the outcomes can negatively affect their own well-being and the quality of patient care delivery. These study results could promote awareness and help nurses to develop strategies for improving patient advocacy activities based on their experiences. Additionally, nurses can seek help, including psychological counseling, when necessary to enhance their optimal well-being as they care for their patients. Nursing educational institutions and hospital managers can support, train, and equip nurses with the required skills for enhancing positive advocacy outcomes. .展开更多
There are several shape measures for quantitative variables, some of which can also be applied to ordinal variables. In quantitative variables, symmetry, peakedness, and kurtosis are essential properties to evaluate t...There are several shape measures for quantitative variables, some of which can also be applied to ordinal variables. In quantitative variables, symmetry, peakedness, and kurtosis are essential properties to evaluate the deviation from assumptions, particularly normality. They aid in selecting the most appropriate method for estimating parameters and testing hypotheses. Initially, these properties serve a descriptive role in qualitative variables. Once defined, they can be considered to check for non-compliance with assumptions and to propose modifications for testing procedures. The objective of this article is to present three measures of the shape of the distribution of a qualitative variable. The concepts of qualitative asymmetry and peakedness are defined. The measurement of the first concept involves calculating the average frequency difference between qualitative categories matched by frequency homogeneity or proximity. For the second concept, the peak-to-shoulder difference and the qualitative percentile kurtosis are taken into consideration. This last measurement is a less effective option than the peak-to-shoulder difference to measure peakedness. A simulated example of the application of these three measures is given and the paper closes with some conclusions and suggestions.展开更多
Objective: This paper aims to understand the psychological experience and needs of pregnant women who need induction of labor due to fetal abnormalities at less than 20 weeks of gestation through in-depth interviews. ...Objective: This paper aims to understand the psychological experience and needs of pregnant women who need induction of labor due to fetal abnormalities at less than 20 weeks of gestation through in-depth interviews. Methods: Using the phenomenological research method in qualitative research, 12 pregnant women with fetal abnormalities less than 20 weeks of gestation in the obstetrics department of a hospital from January to April 2023 were selected as the research objects for semi-structured in-depth interviews. After information was collected to saturation, Colaizzi content analysis method was used to sort out, analyze and refine the data. Results: Through the interview results, three themes were refined from the transcript. Those are: 1) the support and assistance needed during the induction of labor;2) inner feelings after labor induction;3) The vision of future life. Conclusion: Abnormal fetal development at <20 weeks of gestation can cause anxiety, depression, guilt, loneliness and other negative emotions for pregnant women, and they need to get corresponding psychological support, especially during the period from fetal abnormality to induction of labor, pregnant women have to experience many physical and mental suffering, and need to get the care of family, relatives, friends, medical staff and society. Medical staff can help them seek multi-directional support, provide professional knowledge, and help them with self-management.展开更多
Background: The majority of breast cancer patients in Tanzania present with advanced disease, and a significant proportion has metastatic breast cancer (MBC) on presentation or develops it during the course of their f...Background: The majority of breast cancer patients in Tanzania present with advanced disease, and a significant proportion has metastatic breast cancer (MBC) on presentation or develops it during the course of their follow-up. With few treatment options to choose from, such patients often benefit from empathic support and access to information to help them make treatment decisions based on their individual circumstances and needs. Patients with MBC have been shown to present with unique physical, social and psychological needs that require additional time, counselling and availability of health care providers in addition to the routine options available to other patients. In resource-limited settings, the needs of such patients are often unknown and unaddressed, which adds to the anxiety associated with the diagnosis and its treatment. Materials and methods: This descriptive qualitative study was conducted using 3 focus group discussions with a total of 17 participants with metastatic breast cancer (MBC) attending Ocean Road Cancer Institute in Dar es Salaam, Tanzania. Participants were purposively selected for the study from outpatient clinics and inpatient wards. A semi-structured FGD guide was used to moderate discussions and analysis was done using a thematic approach. Results: The median age of participants was 51 (range 33 - 81 years) with an average of 4 months (range 1 - 12 months) from diagnosis of BC to the interview. 4 (24%) were diagnosed with MBC on first presentation (denovo). Participants spoke about the importance of accurate BC-related information in allowing timely referral and treatment both in the community and within the health system. They recognized the role of mass and social media in increasing awareness about BC and identified myths surrounding cancer treatment especially mastectomy. Correct and timely information at points of care, through media platforms and via ambassadors/patient support groups was perceived as a means to avoiding delays and securing early and effective treatment. Conclusion: Patients with MBC in Tanzania have many unmet informational needs in relation to their disease. Accurate BC-related information is important in allowing early detection and diagnosis. At the community level, provision of information through established media platforms and the use of patient advocates may help to enable early referral and treatment of patients.展开更多
Most studies on bariatric surgery identify personal factors such as“non-compliance”to lifestyle changes as the cause of weight gain and subsequent inability to lose weight.Prior qualitative studies suggest that weig...Most studies on bariatric surgery identify personal factors such as“non-compliance”to lifestyle changes as the cause of weight gain and subsequent inability to lose weight.Prior qualitative studies suggest that weight loss patients have complicated relationships with both self and weight,with significant emotional and psychological implications.But how do patients themselves understand the trajectories of their weight gain as related to intrinsic versus extrinsic factors?A qualitative analysis examined the aspects involved in the construction of higher body weight from the perspectives and life experiences of Brazilian women who underwent bariatric surgery,considering that Brazil has previously been reported as a highly anti-fat society.Individual,semi-structured interviews were conducted with thirty women(15 aged 33-59 and 15 aged 63-72).Data were analyzed identifying the regular,expressive,and meaningful significance units identified through the interviews.Although it was expected that different life events were reported as crucial to the perceived aetiology of individual weight gain stories,the participants reported that the emotional aspects had more impact.The extremely high value attached to having a particular body weight negatively influenced the participants’concept of identity and harmed their interactions and understanding of what it meant to be fully loved and accepted.Most of the participants underscored the importance of food in women’s lived experiences and explanations of weight gain.Despite this somatic response being dysfunctionally directed to food,this mechanism seemed to be vital to keeping them alive and engaged in the world.Finally,the participants faced layered vulnerabilities,which decreased their opportunities to access resources aimed at better body weight management.Broad approaches that consider emotional and physical care strategies must be proposed to this population.展开更多
Objective: To explore the work experience of medical staff in the emergency department of a general hospital in the triage of patients with non-traumatic acute abdomen to formulate corresponding intervention measures ...Objective: To explore the work experience of medical staff in the emergency department of a general hospital in the triage of patients with non-traumatic acute abdomen to formulate corresponding intervention measures and branch evaluation tools. Methods: With descriptive phenomenology as the research method, semi-structured interviews were conducted with the medical staff in a tertiary hospital in Nanjing from February 1st to 10th, 2023, and Colaizzi seven-step analysis was used to analyze the data. Results: A total of 17 emergency medical staff were interviewed in this study. Four themes were derived from the analysis of the data: the etiology of acute abdomen is complex, so it is difficult to categorize them: acute abdomen requires immediate treatment, but the treat will be delayed if the categorization is inaccurate;the high pressure of nurses and the accuracy in categorizing the patients are problems that should be addressed. Conclusion: The categorization of patients with non-traumatic acute abdomen is challenging. Therefore, it is necessary to carry out corresponding intervention and formulate appropriate departmental evaluation tools to improve the accuracy of categorization of patients with acute abdomen.展开更多
A problem in chemical analysis in connection with measurements of a substance normally occurring in a sample, or identification of a substance which should not exist in a sample, is insufficient selectivity. In this a...A problem in chemical analysis in connection with measurements of a substance normally occurring in a sample, or identification of a substance which should not exist in a sample, is insufficient selectivity. In this article, we analyze this problem and propose remedies. We use a real doping case to illustrate how chemical noise causes a serious selectivity problem, probably causing a false positive outcome.展开更多
Constructing a qualitative model for discrete rods warhead,the kinematics analysis and dynamics analysis of the rods are completed.On the basis of the qualitative model of discrete rods,a simulation case is provided.T...Constructing a qualitative model for discrete rods warhead,the kinematics analysis and dynamics analysis of the rods are completed.On the basis of the qualitative model of discrete rods,a simulation case is provided.The qualitative simulation result shows that hexagon cross section shape of rod will receive the lowest air drag while by means of better preplaced dip angle,controlling the rotation velocity of the rod and keeping every rod with identical dip angle to the axis of warhead will make the rod get a lateral direction velocity so as to have the rod gain identical casting initial velocity in its length direction.Simulation experiment shows that when dip angle of preplaced discrete rod is 6°,the damage cycle reaches the optimal value.展开更多
In this study the author will pay attention to the relationship between the prior success of Chinese EFL readers and their motivation of reading. This essay is to investigate the question about whether prior success h...In this study the author will pay attention to the relationship between the prior success of Chinese EFL readers and their motivation of reading. This essay is to investigate the question about whether prior success has a positive effect on Chinese EFL readers' motivation.展开更多
In the ESOL/SLA field, qualitative studies try to explain the language learning process not merely from psychological points of view, but also from social and cultural perspectives. In this study, a Chinese learner...In the ESOL/SLA field, qualitative studies try to explain the language learning process not merely from psychological points of view, but also from social and cultural perspectives. In this study, a Chinese learner's perceptions of mainstream English instruction in China has been investigated through the interview, and the problem was explained from social and cultural perspectives.展开更多
This paper analyzes the coal to char stages of char formation of six coals of different ranks by using Fourier transform infrared coupled w ith attenuated total reflectance(ATR-FTIR).The chars w ere obtained by coal p...This paper analyzes the coal to char stages of char formation of six coals of different ranks by using Fourier transform infrared coupled w ith attenuated total reflectance(ATR-FTIR).The chars w ere obtained by coal pyrolysis carried out at temperature range of 450~700℃.The data obtained show s the pragmatic disappearance of the aliphatic hydrogen content w ith increasing char formation temperature.Numerical evaluation of the spectra enabled the determination of aromaticity,fa.The aromaticity w as found to be betw een 0.66~0.79 for lignite,0.75~0.90 for sub-bituminous,0.84~1.00 for low volatile bituminous,0.83~1.00 for high volatile bituminous,0.94~1.00 for semi-anthracite,and 0.97~1.00 for anthracite respectively.With increasing rank of coal samples,spectra exhibit rising aromaticity and enhanced condensation of aromatic rings,w hereas the aliphatic chain lengths decrease.展开更多
Purpose:The purpose was to explore the experiences of nurses caring for patients with delirium in ICU in China.Methods:Semi-structured qualitative interviews were conducted with 14 ICU nurses in Beijing,China.Audio re...Purpose:The purpose was to explore the experiences of nurses caring for patients with delirium in ICU in China.Methods:Semi-structured qualitative interviews were conducted with 14 ICU nurses in Beijing,China.Audio recordings of the transcripts were coded and analysed thematically.Results:The emergent themes reflected clearly similar experiences and were titled as follows:Internal and external barriers to care;Care burden:workload,psychological pressure and injury;Dilemmas in decision-making:balancing risks and benefits.Conclusions:The results of this qualitative study have provided a rich description of the perceptions of a sample of nurses caring for patients with dementia in Beijing.Clearly,the nurses suffered from their work experiences in several aspects:they lacked the knowledge and skills required assessing and managing the patients as early as possible;they were physically and psychologically stressed while looking after the patients and faced with dilemmas and compromises in their decision-making.展开更多
Objective: This study investigated the sources of stress,corresponding symptoms,and stress relief among nurses of the first Chinese anti-Ebola medical team during the Sierra Leone aid mission.Method: A purposive sampl...Objective: This study investigated the sources of stress,corresponding symptoms,and stress relief among nurses of the first Chinese anti-Ebola medical team during the Sierra Leone aid mission.Method: A purposive sampling method was used and 10 nurses were selected from the first Chinese anti-Ebola medical team that was dispatched to Sierra Leone.Data were collected via phone and semistructured interviews,then analyzed using Colaizzi's seven-step method.Results: The data showed three major themes: (1) The causes of stress during the Sierra Leone aid mission mainly related to unsafety,responsibility,and unfamiliarity;(2) Physical,cognitive,emotional,and behavioral symptoms were documented;(3) Nurses experienced relief from stress after the mission.Conclusion: Targeted measures,proper responses and good community support can effectively lower stress among nurses on anti-Ebola missions.展开更多
Aims:To explore the impact of inpatient suicides on nurses working in front-line,the patterns of regulation and their needs for support.Methods:Data were collected through purposive sampling by conducting semi-structu...Aims:To explore the impact of inpatient suicides on nurses working in front-line,the patterns of regulation and their needs for support.Methods:Data were collected through purposive sampling by conducting semi-structured and individual in-depth interviews in a tertiary referral hospital in China.Colaizzi's sevenstep phenomenological method was simultaneously used by two interviewers.Results:Reactions to inpatient suicides revealed three central themes:(1)inpatients were highly likely to commit suicide,(2)inpatient suicide was difficult to prevent,and(3)nurses lacked the necessary suicide prevention skills.Psychological responses mainly included shock and panic,self-accusation or guilt,sense of fear,and frustration.The impacts on practice were stress,excessive vigilance,and burnout.Avoidance and sharing of feelings played key roles in the regulation patterns of nurses.Conclusions:Nurses who experienced inpatient suicide became stressed.Effective interventions must be implemented to improve the coping mechanisms of nurses against the negative consequences of inpatient suicide.The findings of this study will allow administrators to gain insight into the impacts of inpatient suicides on nurses in general hospitals.Such information can be used to develop effective strategies and provide individual support and ongoing education.Consequently,nurses will acquire suicide prevention skills and help patients achieve swift recovery.展开更多
基金We thank the Natural Science Foundation of Shanxi Province(202103021224439)National Natural Science Foundation of China(22075308)for financial support.
文摘The aromatic compounds,including o-xylene,m-xylene,p-xylene,and ethylbenzene,primarily originate from the catalytic reforming of crude oil,and have a wide variety of applications.However,because of similar physical and chemical properties,these compounds are difficult to be identified by gas chromatography(GC)without standard samples.With the development of modern nuclear magnetic resonance(NMR)techniques,NMR has emerged as a powerful and efficient tool for the rapid analysis of complex and crude mixtures without purification.In this study,the parameters of one-dimensional(1D)total correlation spectroscopy(TOCSY)NMR techniques,including 1D selective gradient TOCSY and 1D chemicalshift-selective filtration(CSSF)with TOCSY,were optimized to obtain comprehensive molecular structure information.The results indicate that the overlapped signals in NMR spectra of nonpolar aromatic compounds(including o-xylene,m-xylene,p-xylene and ethylbenzene),polar aromatic compounds(benzyl alcohol,benzaldehyde,benzoic acid),and aromatic compounds with additional conjugated bonds(styrene)can be resolved in 1D TOCSY.More importantly,full molecular structures can be clearly distinguished by setting appropriate mixing time in 1D TOCSY.This approach simplifies the NMR spectra,provides structural information of entire molecules,and can be applied for the analysis of other structural isomers.
文摘BACKGROUND This study employs a descriptive phenomenological approach to investigate the challenges anesthesia nurses face in managing emergence delirium(ED),a common and complex postoperative complication in the post-anesthesia care unit.The role of nurses in managing ED is critical,yet research on their understanding and management strategies for ED is lacking.AIM To investigate anesthetic nurses’cognition and management experiences of ED in hopes of developing a standardized management protocol.METHODS This study employed a descriptive phenomenological approach from qualitative research methodologies.Purposeful sampling was utilized to select 12 anesthetic nurses from a tertiary hospital in Shanghai as research subjects.Semi-structured interviews were conducted,and the data were organized and analyzed using Colaizzi’s seven-step analysis method,from which the final themes were extracted.RESULTS After analyzing the interview content,four main themes and eight subthemes were distilled:Inefficient cognition hinders the identification of ED(conceptual ambiguity,empirical identification),managing diversity and challenges(patientcentered safe care,low level of medical-nursing collaboration),work responsibilities and pressure coexist(heavy work responsibilities,occupational risks and stress),demand for high-quality management(expecting the construction of predictive assessment tools and prevention strategies,and pursuing standardized management processes to enhance management effectiveness).CONCLUSION Nursing managers should prioritize the needs and suggestions of nurses in order to enhance their nursing capabilities and provide guidance for standardized management processes.
基金Supported by National Natural Science Foundation of China,No.82172628。
文摘BACKGROUND Donor-recipient size mismatch(DRSM)is considered a crucial factor for poor outcomes in liver transplantation(LT)because of complications,such as massive intraoperative blood loss(IBL)and early allograft dysfunction(EAD).Liver volumetry is performed routinely in living donor LT,but rarely in deceased donor LT(DDLT),which amplifies the adverse effects of DRSM in DDLT.Due to the various shortcomings of traditional manual liver volumetry and formula methods,a feasible model based on intelligent/interactive qualitative and quantitative analysis-three-dimensional(IQQA-3D)for estimating the degree of DRSM is needed.AIM To identify benefits of IQQA-3D liver volumetry in DDLT and establish an estimation model to guide perioperative management.METHODS We retrospectively determined the accuracy of IQQA-3D liver volumetry for standard total liver volume(TLV)(sTLV)and established an estimation TLV(eTLV)index(eTLVi)model.Receiver operating characteristic(ROC)curves were drawn to detect the optimal cut-off values for predicting massive IBL and EAD in DDLT using donor sTLV to recipient sTLV(called sTLVi).The factors influencing the occurrence of massive IBL and EAD were explored through logistic regression analysis.Finally,the eTLVi model was compared with the sTLVi model through the ROC curve for verification.RESULTS A total of 133 patients were included in the analysis.The Changzheng formula was accurate for calculating donor sTLV(P=0.083)but not for recipient sTLV(P=0.036).Recipient eTLV calculated using IQQA-3D highly matched with recipient sTLV(P=0.221).Alcoholic liver disease,gastrointestinal bleeding,and sTLVi>1.24 were independent risk factors for massive IBL,and drug-induced liver failure was an independent protective factor for massive IBL.Male donor-female recipient combination,model for end-stage liver disease score,sTLVi≤0.85,and sTLVi≥1.32 were independent risk factors for EAD,and viral hepatitis was an independent protective factor for EAD.The overall survival of patients in the 0.85<sTLVi<1.32 group was better compared to the sTLVi≤0.85 group and sTLVi≥1.32 group(P<0.001).There was no statistically significant difference in the area under the curve of the sTLVi model and IQQA-3D eTLVi model in the detection of massive IBL and EAD(all P>0.05).CONCLUSION IQQA-3D eTLVi model has high accuracy in predicting massive IBL and EAD in DDLT.We should follow the guidance of the IQQA-3D eTLVi model in perioperative management.
文摘Objective:Sub-Saharan Africa accounts for 66%of global maternal deaths.In Kenya,362 maternal deaths occur in every 100000 live births.Most of these deaths occur as a result of suboptimal quality care of mothers during labor,delivery,or within 24h of delivery.This study explored barriers that nurse-midwives encounter in trying to provide high-quality obstetric care during these periods.Methods:A qualitative research design utilizing focus group discussion as part of a mixed method study was used to find out the participants'experiences.Data were collected between February and March 2022 in the maternity units of two regional teaching and referral hospitals in Kenya.Eligible participants were nurse-midwives in charge of the maternity unit.The discussion was conducted in English,tape-recorded,and transcribed verbatim,Data were analyzed thematically,following Braun and Clarke 6-step framework.Nvivo version 7.0 computer software was used to facilitate this process.Results:Two focused group discussions each involving seven participants were conducted.The participants agreed that maternal mortality due to postpartum hemorrhage and pregnancy-induced hypertension is a major health concern.Further,maternal care in the two hospitals was substandard.Themes that emerged as barriers were:inadequate supplies;inadequate obstetric knowledge and skills;shortage of nurse-midwives,and inadequate support supervision.The underlying factors include inadequate funding by the county government and high staff turnover.Conclusion:This study showed that nurse-midwives are working under very difficult circumstances which are hindering the provision of quality maternal care.This is mainly due to system failures and inadequate nursemidwife numbers.Targeted strategies need to be urgently implemented to mitigate these challenges to improve the quality of maternal health care.
基金support from the National Research Foundation of Korea(NRF-2021R1I1A3052264).
文摘Background:In crisis intervention sites such as infectious disease disasters,counselors are repeatedly exposed,directly or indirectly,to the traumatic experiences of victims.Disaster counseling has a negative effect on coun-selors,which can eventually interfere with the counseling process for disaster victims.Therefore,exploring and understanding the experiences of counselors is necessary to ensure that qualitative counseling for disaster victims can be continuously and efficiently conducted.Objectives:This study investigated the experiences of counselors who participated in mental health counseling as psychological support for victims of the COVID-19 disaster in Korea.Design:This is a qualitative study.Participants:The study participants comprised 18 counselors who had mental health professional qualifications of level 2 or higher and who had provided mental health counseling for COVID-19 confirmed cases and quarantined persons.Methods:Data were collected using focus group interviews from February 21 to May 29,2021.The duration of each interview was 60–90 min,and the data were analyzed using content analysis.Results:Thefinal theme was“Continuing to walk this road anytime,anywhere.”The par-ticipants’experiences were identified in four sub-themes:“being deployed to unprepared counseling,”“encoun-tering various difficulties,”“feeling full of meaning and value,”and“hoping to become a better counselor.”Conclusions:In order to continuously provide qualitative counseling in case of an infectious disease disaster such as COVID-19,it is important to develop a qualification and competency strengthening program through educa-tion and training to secure the crisis intervention expertise of counselors according to the characteristics of the disaster.In addition,a psychological support manual for each disaster should be prepared at the national level according to the type of disaster.
文摘There are several shape measures for quantitative variables, some of which can also be applied to ordinal variables. In quantitative variables, symmetry, peakedness, and kurtosis are essential properties to evaluate the deviation from assumptions, particularly normality. They aid in selecting the most appropriate method for estimating parameters and testing hypotheses. Initially, these properties serve a descriptive role in qualitative variables. Once defined, they can be considered to check for non-compliance with assumptions and to propose modifications for testing procedures. The objective of this article is to present three measures of the shape of the distribution of a qualitative variable. The concepts of qualitative asymmetry and peakedness are defined. The measurement of the first concept involves calculating the average frequency difference between qualitative categories matched by frequency homogeneity or proximity. For the second concept, the peak-to-shoulder difference and the qualitative percentile kurtosis are taken into consideration. This last measurement is a less effective option than the peak-to-shoulder difference to measure peakedness. A simulated example of the application of these three measures is given and the paper closes with some conclusions and suggestions.
文摘Background: Nurses are expected by their international code of ethics to advocate for patients to enhance safety and quality care. However, there is a limited understanding regarding the implications of specific patient advocacy outcomes experienced by nurses who advocate for patients in the hospital context. Purpose: This study explored the implications of patient advocacy outcomes experienced among practicing nurses in the hospital context. Methods: A qualitative, descriptive study design was utilized. Data was collected through purposive sampling and an in-depth semi-structured interview of 25 Registered Nurses in an acute care hospital. An inductive qualitative content analysis method was used, and the SRQR guidelines for reporting qualitative studies were followed. Results: This study revealed that nurses who succeeded in advocating for patients experienced feelings of happiness, increased confidence levels, increased work output, and job satisfaction. However, nurses who failed to succeed in advocating for patients experienced physical, emotional, and psychological consequences, which contributed negatively to the quality of patient care. Therapeutic communication and nurses’ commitment to intervene for patients emerged as vital qualities and skills required to succeed in the patient advocacy process. Conclusions: This study showed that patient advocacy has advantages. However, when nurses fail to succeed in their attempt to advocate for patients in clinical practice, the outcomes can negatively affect their own well-being and the quality of patient care delivery. These study results could promote awareness and help nurses to develop strategies for improving patient advocacy activities based on their experiences. Additionally, nurses can seek help, including psychological counseling, when necessary to enhance their optimal well-being as they care for their patients. Nursing educational institutions and hospital managers can support, train, and equip nurses with the required skills for enhancing positive advocacy outcomes. .
文摘There are several shape measures for quantitative variables, some of which can also be applied to ordinal variables. In quantitative variables, symmetry, peakedness, and kurtosis are essential properties to evaluate the deviation from assumptions, particularly normality. They aid in selecting the most appropriate method for estimating parameters and testing hypotheses. Initially, these properties serve a descriptive role in qualitative variables. Once defined, they can be considered to check for non-compliance with assumptions and to propose modifications for testing procedures. The objective of this article is to present three measures of the shape of the distribution of a qualitative variable. The concepts of qualitative asymmetry and peakedness are defined. The measurement of the first concept involves calculating the average frequency difference between qualitative categories matched by frequency homogeneity or proximity. For the second concept, the peak-to-shoulder difference and the qualitative percentile kurtosis are taken into consideration. This last measurement is a less effective option than the peak-to-shoulder difference to measure peakedness. A simulated example of the application of these three measures is given and the paper closes with some conclusions and suggestions.
文摘Objective: This paper aims to understand the psychological experience and needs of pregnant women who need induction of labor due to fetal abnormalities at less than 20 weeks of gestation through in-depth interviews. Methods: Using the phenomenological research method in qualitative research, 12 pregnant women with fetal abnormalities less than 20 weeks of gestation in the obstetrics department of a hospital from January to April 2023 were selected as the research objects for semi-structured in-depth interviews. After information was collected to saturation, Colaizzi content analysis method was used to sort out, analyze and refine the data. Results: Through the interview results, three themes were refined from the transcript. Those are: 1) the support and assistance needed during the induction of labor;2) inner feelings after labor induction;3) The vision of future life. Conclusion: Abnormal fetal development at <20 weeks of gestation can cause anxiety, depression, guilt, loneliness and other negative emotions for pregnant women, and they need to get corresponding psychological support, especially during the period from fetal abnormality to induction of labor, pregnant women have to experience many physical and mental suffering, and need to get the care of family, relatives, friends, medical staff and society. Medical staff can help them seek multi-directional support, provide professional knowledge, and help them with self-management.
文摘Background: The majority of breast cancer patients in Tanzania present with advanced disease, and a significant proportion has metastatic breast cancer (MBC) on presentation or develops it during the course of their follow-up. With few treatment options to choose from, such patients often benefit from empathic support and access to information to help them make treatment decisions based on their individual circumstances and needs. Patients with MBC have been shown to present with unique physical, social and psychological needs that require additional time, counselling and availability of health care providers in addition to the routine options available to other patients. In resource-limited settings, the needs of such patients are often unknown and unaddressed, which adds to the anxiety associated with the diagnosis and its treatment. Materials and methods: This descriptive qualitative study was conducted using 3 focus group discussions with a total of 17 participants with metastatic breast cancer (MBC) attending Ocean Road Cancer Institute in Dar es Salaam, Tanzania. Participants were purposively selected for the study from outpatient clinics and inpatient wards. A semi-structured FGD guide was used to moderate discussions and analysis was done using a thematic approach. Results: The median age of participants was 51 (range 33 - 81 years) with an average of 4 months (range 1 - 12 months) from diagnosis of BC to the interview. 4 (24%) were diagnosed with MBC on first presentation (denovo). Participants spoke about the importance of accurate BC-related information in allowing timely referral and treatment both in the community and within the health system. They recognized the role of mass and social media in increasing awareness about BC and identified myths surrounding cancer treatment especially mastectomy. Correct and timely information at points of care, through media platforms and via ambassadors/patient support groups was perceived as a means to avoiding delays and securing early and effective treatment. Conclusion: Patients with MBC in Tanzania have many unmet informational needs in relation to their disease. Accurate BC-related information is important in allowing early detection and diagnosis. At the community level, provision of information through established media platforms and the use of patient advocates may help to enable early referral and treatment of patients.
基金support from the Research Support Foundation of the State of São Paulo(FAPESP)grant number 2019/00031-0the Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq),under the process number 309514/2018-5.
文摘Most studies on bariatric surgery identify personal factors such as“non-compliance”to lifestyle changes as the cause of weight gain and subsequent inability to lose weight.Prior qualitative studies suggest that weight loss patients have complicated relationships with both self and weight,with significant emotional and psychological implications.But how do patients themselves understand the trajectories of their weight gain as related to intrinsic versus extrinsic factors?A qualitative analysis examined the aspects involved in the construction of higher body weight from the perspectives and life experiences of Brazilian women who underwent bariatric surgery,considering that Brazil has previously been reported as a highly anti-fat society.Individual,semi-structured interviews were conducted with thirty women(15 aged 33-59 and 15 aged 63-72).Data were analyzed identifying the regular,expressive,and meaningful significance units identified through the interviews.Although it was expected that different life events were reported as crucial to the perceived aetiology of individual weight gain stories,the participants reported that the emotional aspects had more impact.The extremely high value attached to having a particular body weight negatively influenced the participants’concept of identity and harmed their interactions and understanding of what it meant to be fully loved and accepted.Most of the participants underscored the importance of food in women’s lived experiences and explanations of weight gain.Despite this somatic response being dysfunctionally directed to food,this mechanism seemed to be vital to keeping them alive and engaged in the world.Finally,the participants faced layered vulnerabilities,which decreased their opportunities to access resources aimed at better body weight management.Broad approaches that consider emotional and physical care strategies must be proposed to this population.
文摘Objective: To explore the work experience of medical staff in the emergency department of a general hospital in the triage of patients with non-traumatic acute abdomen to formulate corresponding intervention measures and branch evaluation tools. Methods: With descriptive phenomenology as the research method, semi-structured interviews were conducted with the medical staff in a tertiary hospital in Nanjing from February 1st to 10th, 2023, and Colaizzi seven-step analysis was used to analyze the data. Results: A total of 17 emergency medical staff were interviewed in this study. Four themes were derived from the analysis of the data: the etiology of acute abdomen is complex, so it is difficult to categorize them: acute abdomen requires immediate treatment, but the treat will be delayed if the categorization is inaccurate;the high pressure of nurses and the accuracy in categorizing the patients are problems that should be addressed. Conclusion: The categorization of patients with non-traumatic acute abdomen is challenging. Therefore, it is necessary to carry out corresponding intervention and formulate appropriate departmental evaluation tools to improve the accuracy of categorization of patients with acute abdomen.
文摘A problem in chemical analysis in connection with measurements of a substance normally occurring in a sample, or identification of a substance which should not exist in a sample, is insufficient selectivity. In this article, we analyze this problem and propose remedies. We use a real doping case to illustrate how chemical noise causes a serious selectivity problem, probably causing a false positive outcome.
文摘Constructing a qualitative model for discrete rods warhead,the kinematics analysis and dynamics analysis of the rods are completed.On the basis of the qualitative model of discrete rods,a simulation case is provided.The qualitative simulation result shows that hexagon cross section shape of rod will receive the lowest air drag while by means of better preplaced dip angle,controlling the rotation velocity of the rod and keeping every rod with identical dip angle to the axis of warhead will make the rod get a lateral direction velocity so as to have the rod gain identical casting initial velocity in its length direction.Simulation experiment shows that when dip angle of preplaced discrete rod is 6°,the damage cycle reaches the optimal value.
文摘In this study the author will pay attention to the relationship between the prior success of Chinese EFL readers and their motivation of reading. This essay is to investigate the question about whether prior success has a positive effect on Chinese EFL readers' motivation.
文摘In the ESOL/SLA field, qualitative studies try to explain the language learning process not merely from psychological points of view, but also from social and cultural perspectives. In this study, a Chinese learner's perceptions of mainstream English instruction in China has been investigated through the interview, and the problem was explained from social and cultural perspectives.
基金Supported by the South African Research Chairs Initiative of the Department of Science and Technology and National Research Foundation of South Africa(Coal Research Chair Grant No.86880)
文摘This paper analyzes the coal to char stages of char formation of six coals of different ranks by using Fourier transform infrared coupled w ith attenuated total reflectance(ATR-FTIR).The chars w ere obtained by coal pyrolysis carried out at temperature range of 450~700℃.The data obtained show s the pragmatic disappearance of the aliphatic hydrogen content w ith increasing char formation temperature.Numerical evaluation of the spectra enabled the determination of aromaticity,fa.The aromaticity w as found to be betw een 0.66~0.79 for lignite,0.75~0.90 for sub-bituminous,0.84~1.00 for low volatile bituminous,0.83~1.00 for high volatile bituminous,0.94~1.00 for semi-anthracite,and 0.97~1.00 for anthracite respectively.With increasing rank of coal samples,spectra exhibit rising aromaticity and enhanced condensation of aromatic rings,w hereas the aliphatic chain lengths decrease.
基金This study was financially supported by the Capital Foundation of Traditional Medicine and Nursing Research(approval number:10ZYH14)Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality(PHR201107114)。
文摘Purpose:The purpose was to explore the experiences of nurses caring for patients with delirium in ICU in China.Methods:Semi-structured qualitative interviews were conducted with 14 ICU nurses in Beijing,China.Audio recordings of the transcripts were coded and analysed thematically.Results:The emergent themes reflected clearly similar experiences and were titled as follows:Internal and external barriers to care;Care burden:workload,psychological pressure and injury;Dilemmas in decision-making:balancing risks and benefits.Conclusions:The results of this qualitative study have provided a rich description of the perceptions of a sample of nurses caring for patients with dementia in Beijing.Clearly,the nurses suffered from their work experiences in several aspects:they lacked the knowledge and skills required assessing and managing the patients as early as possible;they were physically and psychologically stressed while looking after the patients and faced with dilemmas and compromises in their decision-making.
文摘Objective: This study investigated the sources of stress,corresponding symptoms,and stress relief among nurses of the first Chinese anti-Ebola medical team during the Sierra Leone aid mission.Method: A purposive sampling method was used and 10 nurses were selected from the first Chinese anti-Ebola medical team that was dispatched to Sierra Leone.Data were collected via phone and semistructured interviews,then analyzed using Colaizzi's seven-step method.Results: The data showed three major themes: (1) The causes of stress during the Sierra Leone aid mission mainly related to unsafety,responsibility,and unfamiliarity;(2) Physical,cognitive,emotional,and behavioral symptoms were documented;(3) Nurses experienced relief from stress after the mission.Conclusion: Targeted measures,proper responses and good community support can effectively lower stress among nurses on anti-Ebola missions.
基金The authors would like to express our gratitude to all participants who have given generosity of their time as well as shared with the research team their feelings and experience.In addition,they thank Yanhong Han for her help in the preparation of this manuscriptFunding:The research for this paper was supported by Natural Science Fund of Hubei Province(No.2014CKB1014).
文摘Aims:To explore the impact of inpatient suicides on nurses working in front-line,the patterns of regulation and their needs for support.Methods:Data were collected through purposive sampling by conducting semi-structured and individual in-depth interviews in a tertiary referral hospital in China.Colaizzi's sevenstep phenomenological method was simultaneously used by two interviewers.Results:Reactions to inpatient suicides revealed three central themes:(1)inpatients were highly likely to commit suicide,(2)inpatient suicide was difficult to prevent,and(3)nurses lacked the necessary suicide prevention skills.Psychological responses mainly included shock and panic,self-accusation or guilt,sense of fear,and frustration.The impacts on practice were stress,excessive vigilance,and burnout.Avoidance and sharing of feelings played key roles in the regulation patterns of nurses.Conclusions:Nurses who experienced inpatient suicide became stressed.Effective interventions must be implemented to improve the coping mechanisms of nurses against the negative consequences of inpatient suicide.The findings of this study will allow administrators to gain insight into the impacts of inpatient suicides on nurses in general hospitals.Such information can be used to develop effective strategies and provide individual support and ongoing education.Consequently,nurses will acquire suicide prevention skills and help patients achieve swift recovery.
