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UV/Vis-based process analytical technology to improve monoclonal antibody and host cell protein separation
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作者 Yu Kiat Lin Yan-Na Sun +3 位作者 Yu Fan Hui Yi Leong Dong-Qiang Lin Shan-Jing Yao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第3期230-235,共6页
Process analytical technology(PAT) is gaining more interest in the biomanufacturing industry because of its potential to improve operational control and compliance through real-time quality assurance.Currently, biopha... Process analytical technology(PAT) is gaining more interest in the biomanufacturing industry because of its potential to improve operational control and compliance through real-time quality assurance.Currently, biopharmaceutical producers mainly monitor chromatographic processes with ultraviolet/visible(UV/Vis) absorbance. However, this measurement has a very limited correlation with purity and quantity. The current study aims to determine the concentration of monoclonal antibody(mAb) and host cell proteins(HCPs) using a build-in UV/Vis monitoring during Protein A affinity chromatography and to optimize the separation conditions for high purity of mAb and minimizing the HCPs content. The eluate was analyzed through in-line UV/Vis at 280 and 410 nm, representing mAb and HCPs concentration,respectively. Each 0.1 column volume(CV) fraction of UV/Vis chromatogram peak area were calculated,and different separation conditions were then compared. The optimum conditions of mAb separation were found as 12 CV loading, elution at pH 3.5, and starting the collection at 0.5 CV point, resulting in high m Ab recovery of 95.92% and additional removal of 49.98% of HCP comparing with whole elution pool. This study concluded that UV/Vis-based in-line monitoring at 280 and 410 nm showed a high potential to optimize and real-time control Protein A affinity chromatography for mAb purification from HCPs. 展开更多
关键词 Affinity chromatography Host cell protein Monoclonal antibody process analytical technology SPECTROSCOPY
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Raman spectroscopy as process analytical tool in downstream processing of biotechnology 被引量:2
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作者 Yu Kiat Lin Hui Yi Leong +2 位作者 Tau Chuan Ling Dong-Qiang Lin Shan-Jing Yao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第2期204-211,共8页
Downstream processing or product recovery plays a vital role in the development of bioprocesses.To improve the bioprocess efficiency,some unconventional methods are much required.The continuous manufacturing in downst... Downstream processing or product recovery plays a vital role in the development of bioprocesses.To improve the bioprocess efficiency,some unconventional methods are much required.The continuous manufacturing in downstream processing makes the Process Analytical Technologies(PATs)as an important tool.Monitoring and controlling bioprocess are an essential factor for the principles of PAT and quality by design.Spectroscopic methods can apply to monitor multiple analytes in real-time with less sample processing with significant advancements.Raman spectroscopy is an extensively used technique as an analytical and research tool owing to its modest process form,non-destructive,non-invasive optical molecular spectroscopic imaging with computer-based analysis.Generally,its application is essential for the analysis and characterization of biological samples,and it is easy to operate with minimal sample.The innovation on various types of enhanced Raman spectroscopy was designed to enhance the Raman analytical technique.Raman spectroscopy could couple with chemometrics to provide reliable alternative analysis method of downstream process analysis.Thus,this review aims to provide useful insight on the application of Raman spectroscopy for PAT in downstream processing of biotechnology and Raman data analysis in biological fields. 展开更多
关键词 Raman spectroscopy process analytical technology Downstream bioprocessing BIOtechnology
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Study progression in application of process analytical technologies on film coating
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作者 Tingting Peng Ying Huang +4 位作者 Liling Mei Linna Wu Longkai Chen Xin Pan Chuanbin Wu 《Asian Journal of Pharmaceutical Sciences》 SCIE CAS 2015年第3期176-185,共10页
Film coating is an important unit operation to produce solid dosage forms,thereby,the monitoring of this process is helpful to find problems in time and improve the quality of coated products.Traditional methods adopt... Film coating is an important unit operation to produce solid dosage forms,thereby,the monitoring of this process is helpful to find problems in time and improve the quality of coated products.Traditional methods adopted to monitor this process include measurement of coating weight gain,performance of disintegration and dissolution test,etc.However,not only do these methods cause destruction to the samples,but also consume time and energy.There have recently emerged the applications of process analytical technologies(PAT)on film coating,especially some novel spectroscopic and imaging technologies,which have the potential to real-time track the progress in film coating and optimize production efficiency.This article gives an overview on the application of such technologies for film coating,with the goal to provide a reference for the further researches. 展开更多
关键词 Film coating process analytical technologies (pat) Spectroscopic techniques Imaging techniques
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Process analytical technologies and self-optimization algorithms in automated pharmaceutical continuous manufacturing 被引量:1
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作者 Peiwen Liu Hui Jin +5 位作者 Yan Chen Derong Wang Haohui Yan Mingzhao Wu Fang Zhao Weiping Zhu 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第3期87-95,共9页
The pharmaceutical industry is now paying increased attention to continuous manufacturing.While the revolution to continuous and automated manufacturing is deepening in most of the top pharma companies in the world,th... The pharmaceutical industry is now paying increased attention to continuous manufacturing.While the revolution to continuous and automated manufacturing is deepening in most of the top pharma companies in the world,the advancement of automated pharmaceutical continuous manufacturing in China is relatively slow due to some key challenges including the lack of knowledge on the related technologies and shortage of qualified personnels.In this review,emphasis is given to two of the crucial technologies in automated pharmaceutical continuous manufacturing,i.e.,process analytical technology(PAT)and self-optimizing algorithm.Research work published in recent 5 years employing advanced PAT tools and self-optimization algorithms is introduced,which represents the great progress that has been made in automated pharmaceutical continuous manufacturing. 展开更多
关键词 Pharmaceutical continuous manufacturing AUTOMATION process analytical technology Self-optimization algorithm
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The Multiplicative Analytic Hierarchy Process (MIAHP) as a Quality Criterion Determining the Technological Value of the Egyptian Cotton Varieties
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作者 Khaled M. Hussein AbdElbaset A. Hassan Mostafa M. Kamal 《American Journal of Plant Sciences》 2010年第2期106-112,共7页
This study was undertaken to develop a numerical process that can be used as a quality criterion to determine the technological value of the Egyptian cotton varieties, which in turn would denote the end-use of their f... This study was undertaken to develop a numerical process that can be used as a quality criterion to determine the technological value of the Egyptian cotton varieties, which in turn would denote the end-use of their fibers. However the material used in the study comprised the 6 Egyptian cotton varieties Giza70, Giza80, Giza86, Giza88, Giza90 and Giza92. According to the local practice in Egypt, Giza70, Giza88 and Giza92 belong to the Extra-Long Staple (ELS) category, while Giza80, Giza86 and Giza90 are included under the Long Staple (LS) category. The regression analysis of the relationships between fiber properties and yarn skein strength (lea product) of the 2 carded ring counts 40 and 50 Ne, was employed to drive an equation for calculating the Multiplicative Analytic Hierarchy Process (MIAHP) values. The values of the MIAHP have been used as numerical determinations of the technological values of the Egyptian cotton varieties. Nevertheless, the findings of this study clarified that with respect to the criteria weights, the pair-wise comparisons denoted that fiber length properties of Egyptian cotton ranked first where they revealed the most dominant effect on yarn strength, while tensile properties ranked second with a relative weight close to that of fiber length. On the contrary, the relative weight of fiber fineness (micronaire reading) was found to be marginal. With regard to the relative weight of sub-criterion, the pair-wise comparisons indicated that the role of fiber tenacity as a determinant of yarn strength is much superior to that of fiber elongation. Further the global weights of the sub-criterion of fiber length pointed out that the UHML (upper half mean length) plays an important role in determining yarn strength of the Egyptian cotton comparing with either the UI (uniformity index) or the SFC (short fiber content). In conformity with the values of the MIAHP, it was found that in the order of descending rank, Giza88 ranked first, followed by Giza92, Giza70, Giza86, Giza80 and finally Giza90. 展开更多
关键词 analytIC HIERARCHY process Cotton Fiber QUALITY technological Value
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Using the Analytical Hierarchy Process Model in the Prioritization of Information Assurance Defense In-Depth Measures?—A Quantitative Study
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作者 Rodney Alexander 《Journal of Information Security》 2017年第3期166-173,共8页
Organizational computing devices are increasingly becoming targets of cyber-attacks, and organizations have become dependent on the safety and security of their computer networks and their organizational computing dev... Organizational computing devices are increasingly becoming targets of cyber-attacks, and organizations have become dependent on the safety and security of their computer networks and their organizational computing devices. Business and government often use defense in-depth information assurance measures such as firewalls, intrusion detection systems, and password procedures across their enterprises to plan strategically and manage IT security risks. This quantitative study explores whether the analytical hierarchy process (AHP) model can be effectively applied to the prioritization of information assurance defense in-depth measures. In response to these threats, the President, legislators, experts, and others have characterized cyber security as a pressing national security issue. The methods used in this study consisted of emailing study participants a survey requesting that they prioritize five defense in-depth information assurance measures, anti-virus, intrusion detection, password, smart-cards, and encryption, with a range of responses from 1 - 5 using a Likert scale to consider standard cost, effectiveness, and perceived ease of use in terms of protection of organizational computing devices. The measures were then weighted, based on ranking. A pair-wise comparison of each of the five measures is then made using AHP to determine whether the Likert scale and the AHP model could be effectively applied to the prioritization of information assurance measures to protect organizational computing devices. The findings of the research reject the H0 null hypothesis that AHP does not affect the relationship between the information technology analysts’ prioritization of five defense in-depth dependent variables and the independent variables of cost, ease of use, and effectiveness in protecting organizational devices against cyber-attacks. 展开更多
关键词 INFORMATION ASSURANCE analytical HIERARCHY process DEFENSE in DEPTH INFORMATION technology
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Transformation and risk assessment of the East Kolkata Wetlands (India)using fuzzy MCDM method and geospatial technology
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作者 Biraj Kanti Mondal Suchitra Kumari +1 位作者 Arijit Ghosh Prabuddh Kumar Mishra 《Geography and Sustainability》 2022年第3期191-203,共13页
The East Kolkata Wetlands (EKW) is located on the eastern periphery of the city of Kolkata and extends up to theBidyadhari-Matla River confluence. It is a Ramsar Site and acts as an absorber basin for a large number o... The East Kolkata Wetlands (EKW) is located on the eastern periphery of the city of Kolkata and extends up to theBidyadhari-Matla River confluence. It is a Ramsar Site and acts as an absorber basin for a large number of con-taminants drained from Kolkata. Agricultural lands, sewage-fed fisheries, garbage dumping fields, horticulture,and built-up areas are included in this protected area, that covers approximately 125 km2. It reveals that climatechange reduces the variety of wetland ecosystem services and increases socio-economic vulnerability and eco-nomic stress. The human encroachment, reclamation of land for agriculture, aquaculture, and urban expansion inand around Kolkata has recently adversely threatened the EKW. The remotely sensed data, socio-economic data,and responses of inhabitants have been used to analyse the EKW’s risk and vulnerability. We employed geospatialanalysis by using the Multi-Criteria Decision Making (MCDM) method using nine risk factors. An in-depth analysisof the EKW using geospatial techniques and the Fuzzy Analytic Hierarchy Process (FAHP) helped to understandthe EKW transformations through vulnerability and risk analysis. The results show that the transformation of thewetland to aquaculture, eutrophication and pollution, road proximity, waste dumping, population density, andgrowth are the main factors for the deteriorating health, quality, and environment of the EKW. It also reveals thatquantitative and qualitative evaluations of ecosystem services, wetland degradation, transformation, and cause-effect rapport should be periodically assessed using scientific methods like FAHP, RS, GIS to formulate resilient,integrated plans and strategy for the sustainable management of the EKW. 展开更多
关键词 East Kolkata Wetlands(EKW) Fuzzy analytic Hierarchy process(FAHP) Multi-Criteria Decision Making(MCDM) Geospatial technology VULNERABILITY Management
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A new PAT application: Optimization of processing methods for honeysuckle flower (Lonicerae Japonicae Flos) and wild honeysuckle flower (Lonicerae Flos) 被引量:1
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作者 Jiangbo Hao Zhisheng Wu +2 位作者 Weidong Li Zhongshuang Zhang Jinrui Gu 《Journal of Traditional Chinese Medical Sciences》 2018年第2期199-205,共7页
Objective:A novel processing analytical framework of Chinese Material Medica (CMM) includes breeding process analysis,planting process analysis,producing process analysis and manufacture process analysis.In order to s... Objective:A novel processing analytical framework of Chinese Material Medica (CMM) includes breeding process analysis,planting process analysis,producing process analysis and manufacture process analysis.In order to study this framework,we used quality control of honeysuckle flower (Lonicerae japonicae Flos) including diploid and tetraploid Lonicera japonica,and wild honeysuckle flower (Lonicerae Flos) including Lonicerae hypoglauca,Lonicerae confusa,Lonicerae fulvotomentosa and Lonicerae macranthoides as an example.Methods:A total of 360 samples were analyzed from three variables including species,growing areas,and optimization of processing methods.For quantitative analysis,chlorogenic acid (CA),isochlorogenic acid A (3,5-DCA),and isochlorogenic acid C (4,5-DCA) were measured with high performance liquid chromatography (HPLC).Results:The three organic acids contents are higher in wild honeysuckle flower than honeysuckle flower;L.japonica (tetraploid) is higher than L.japonica (diploid).Modern processing methods (kill-enzyme torrefaction and fixing machine drying) are popular in growing areas and are superior to traditional methods (sun and shade drying).Conclusions:Novel process analysis concepts in processing analytical technology (PAT) enriched the Chinese MateHal Medica contents. 展开更多
关键词 HONEYSUCKLE FLOWER WILD HONEYSUCKLE FLOWER processING analytical technology Quality control processING method
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Granulation process analysis technologies and potential applications in traditional Chinese medicine 被引量:1
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作者 Tongcan Cui Yizhe Hou +3 位作者 Huimin Feng Sijun Wu Wenlong Li Zheng Li 《Acupuncture and Herbal Medicine》 2022年第1期9-24,共16页
Pharmaceutical production is changing from batch production to continuous production,during which granulation is one of the most important unit operations.The quality of mass-produced products is traditionally guarant... Pharmaceutical production is changing from batch production to continuous production,during which granulation is one of the most important unit operations.The quality of mass-produced products is traditionally guaranteed by conducting off-line testing,which cannot meet the demand of continuous production for real-time monitoring of critical process parameters and critical quality attributes(CQAs)of the pharmaceutical granulation technology.Since the U.S.Food and Drug Administration proposed process analytical technology(PAT)in 2004,many PAT tools have been developed to monitor the granulation process and provide information regarding the granulation operation conditions and endpoint determination.In this article,we review the recent research and application of two PAT modes in the granulation process,namely,single CQA and multi-CQA PAT,with the aim to provide references for comprehensively improving the technological level of the pharmaceutical granulation process.Furthermore,the potential applications in traditional Chinese Medicine are discussed. 展开更多
关键词 Critical process parameters Critical quality attributes Pharmaceutical granulation technology process analytical technology
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Online pharmaceutical process analysis of Chinese medicine using a miniature mass spectrometer: Extraction of active ingredients as an example 被引量:1
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作者 Wangmin Hu Junling Hou +4 位作者 Wenjing Liu Xuan Gu Yulei Yang Hongcai Shang Mei Zhang 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2023年第5期535-543,共9页
The automation of traditional Chinese medicine(TCM)pharmaceuticals has driven the development of process analysis from offline to online.Most of common online process analytical technologies are based on spectroscopy,... The automation of traditional Chinese medicine(TCM)pharmaceuticals has driven the development of process analysis from offline to online.Most of common online process analytical technologies are based on spectroscopy,making the identification and quantification of specific ingredients still a challenge.Herein,we developed a quality control(QC)system for monitoring TCM pharmaceuticals based on paper spray ionization miniature mass spectrometry(mini-MS).It enabled real-time online qualitative and quantitative detection of target ingredients in herbal extracts using mini-MS without chromatographic separation for the first time.Dynamic changes of alkaloids in Aconiti Lateralis Radix Praeparata(Fuzi)during decoction were used as examples,and the scientific principle of Fuzi compatibility was also investigated.Finally,the system was verified to work stably at the hourly level for pilot-scale extraction.This mini-MS based online analytical system is expected to be further developed for QC applications in a wider range of pharmaceutical processes. 展开更多
关键词 process analytical technology TCM Pharmaceuticals Miniature mass spectrometry Online analysis
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Selection of IT Sourcing Alternatives in Public Sector Using the Analytic Hierarchy Process
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作者 Dalibor Stanimirovic Mirko Vintar 《Computer Technology and Application》 2012年第7期485-498,共14页
Recent research carried out in the public sector shows that outsourcing can indisputably bring many benefits to the organizations which master the art of devising, deploying and maintaining outsourcing relationships. ... Recent research carried out in the public sector shows that outsourcing can indisputably bring many benefits to the organizations which master the art of devising, deploying and maintaining outsourcing relationships. However, for many organizations, these benefits remain elusive, while outsourcing projects are usually accompanied by unexpected and often negative effects. The paper focuses on in-depth analysis of the current situation concerning outsourcing of information technology projects (IT-projects) in Slovenian public sector. Presented research initially analyses substantive, procedural and other relevant aspects of outsourcing and provides a set of applicable decision making criteria. Stemming from the analysis results, this paper eventually presents the development of a multi criteria decision-support model based on Analytic Hierarchy Process (AHP) which could facilitate enhanced evaluation, selection and implementation of IT outsourcing projects in the public sector. 展开更多
关键词 Public sector management IT (information technology outsourcing outsourcing criteria AHP analytic hierarchy process decision-support model.
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Application of Industry: A AHP Method to Technolo Selection for Emerging Case Study of Chinese Biotechnology Enterprises
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《International English Education Research》 2013年第12期56-59,共4页
Selecting the promising technologies to incorporate in new products is challenging for enterprises, especially for those who compete in emerging high-technology industries. By integrating external factor evaluation (... Selecting the promising technologies to incorporate in new products is challenging for enterprises, especially for those who compete in emerging high-technology industries. By integrating external factor evaluation (EFE) and internal factor evaluation (1FE) matrix, this study proposes a new technology selection method. The proposed fi'am^work is applied to a real technology selection problem faced by a bio-technology enterprise in the context of China' s economic, political and social environment. Two major aspects and 24 external/internal factors are determined. This study uses analytic hierarchy process (AHP) method to sort the information and derives weights of each criterion. Empirical results indicate that the candidate technology is promising, and shall be developed as one of the enterprise's primary products. 展开更多
关键词 technology selection analytic hierarchy process China' s biotechnology industry
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Process Characterization of the Transesterification of Rapeseed Oil to Biodiesel Using Design of Experiments and Infrared Spectroscopy
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作者 Tobias Drieschner Andreas Kandelbauer +1 位作者 Bernd Hitzmann Karsten Rebner 《Journal of Renewable Materials》 SCIE EI 2023年第4期1643-1660,共18页
For optimization of production processes and product quality,often knowledge of the factors influencing the process outcome is compulsory.Thus,process analytical technology(PAT)that allows deeper insight into the proc... For optimization of production processes and product quality,often knowledge of the factors influencing the process outcome is compulsory.Thus,process analytical technology(PAT)that allows deeper insight into the process and results in a mathematical description of the process behavior as a simple function based on the most important process factors can help to achieve higher production efficiency and quality.The present study aims at characterizing a well-known industrial process,the transesterification reaction of rapeseed oil with methanol to produce fatty acid methyl esters(FAME)for usage as biodiesel in a continuous micro reactor set-up.To this end,a design of experiment approach is applied,where the effects of two process factors,the molar ratio and the total flow rate of the reactants,are investigated.The optimized process target response is the FAME mass fraction in the purified nonpolar phase of the product as a measure of reaction yield.The quantification is performed using attenuated total reflection infrared spectroscopy in combination with partial least squares regression.The data retrieved during the conduction of the DoE experimental plan were used for statistical analysis.A non-linear model indicating a synergistic interaction between the studied factors describes the reactor behavior with a high coefficient of determination(R^(2))of 0.9608.Thus,we applied a PAT approach to generate further insight into this established industrial process. 展开更多
关键词 process analytical technology TRANSESTERIFICATION design of experiment attenuated total reflection infrared spectroscopy partial least square regression
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基于改进层次分析法的航天器量化风险分析方法
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作者 赵毅 魏玉波 +2 位作者 赵林 谢兆耕 王临政 《航天器工程》 CSCD 北大核心 2024年第3期124-128,共5页
航天器研制风险的量化分析与评估能够有效提高资源投入和风险控制措施的精准性。为满足当前航天器项目对风险量化管理的要求,航天器风险识别与控制应覆盖研制全流程。文章采用改进层次(AHP)-模糊综合评价法,给出了风险分析与评估的方法... 航天器研制风险的量化分析与评估能够有效提高资源投入和风险控制措施的精准性。为满足当前航天器项目对风险量化管理的要求,航天器风险识别与控制应覆盖研制全流程。文章采用改进层次(AHP)-模糊综合评价法,给出了风险分析与评估的方法及流程,并以遥感领域发射卫星为例,基于项目特点建立了覆盖技术、费用、质量、管理四个方面的风险要素集,运用专家打分得到风险评价隶属度矩阵,对风险等级进行科学量化,对项目间、项目内部风险要素进行分析,给出风险控制重点项目。在风险因素增多、项目数量上升的情况下,风险量化分析方法能够在比较项目间风险的严重程度、合理分配资源方面,为管理者提供更好的决策支撑。 展开更多
关键词 空间技术工程 风险管理 改进层次分析法 模糊综合评价法
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以功效物质为质量目标的中药生产过程质量控制研究与实践
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作者 肖伟 张欣 +2 位作者 徐芳芳 章晨峰 王振中 《南京中医药大学学报》 CAS CSCD 北大核心 2024年第10期1030-1038,共9页
中药生产过程质量控制是影响中药产品质量的关键,但中药成分的多样性和生产过程的复杂性给过程质量的精准控制带来巨大挑战。首先提出了以功效物质为核心的中药智能化控制理念,系统阐释了中药质量的科学内涵,为中药复杂成分体系“控什... 中药生产过程质量控制是影响中药产品质量的关键,但中药成分的多样性和生产过程的复杂性给过程质量的精准控制带来巨大挑战。首先提出了以功效物质为核心的中药智能化控制理念,系统阐释了中药质量的科学内涵,为中药复杂成分体系“控什么”“怎么控”提供了理论依据。同时,通过先进信息化、数字化和智能化技术,对中药生产过程开展了智改数转的研究和建设实践。最终建立了以功效物质为质量目标的中药生产过程质量控制体系,为解决过程质量控制难题提供了契机。 展开更多
关键词 中药生产 过程质量控制 功效物质 智能制造 过程分析技术
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中国科学仪器上市企业科技创新能力综合评价
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作者 董璐 王志强 +1 位作者 李泽霞 杨娟 《科技管理研究》 CSSCI 2024年第11期63-71,共9页
从创新投入、创新环境、创新产出、创新影响4个方面构建科学仪器企业科技创新能力评价指标体系,采用层次分析法、熵权法组合赋权,通过TOPSIS-障碍度模型对科学仪器企业的科技创新能力进行综合评价分析,以42家中国科学仪器上市企业为样... 从创新投入、创新环境、创新产出、创新影响4个方面构建科学仪器企业科技创新能力评价指标体系,采用层次分析法、熵权法组合赋权,通过TOPSIS-障碍度模型对科学仪器企业的科技创新能力进行综合评价分析,以42家中国科学仪器上市企业为样本进行实证研究。研究发现目前制约我国科学仪器科技创新能力发展的最主要因素是产学研合作、产品与技术国际专利布局、研发投入等方面存在的问题。鉴于此,应加强以企业为主体的产学研用合作协同创新模式,持续加大研发投入力度,重视技术、软件的开发及知识产权保护等,优化国际市场布局,为科学仪器企业科技创新发展赋能。 展开更多
关键词 科学仪器企业 科技创新能力 层次分析法-熵权法 TOPSIS-障碍度模型
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装配式项目BIM技术应用风险管理研究
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作者 叶剑梅 《价值工程》 2024年第29期44-47,共4页
针对装配式项目在应用BIM技术时可能存在的风险与不确定性,将层次分析法与模糊综合评价相结合,建立基于模糊层次分析法的装配式项目应用BIM技术风险评价模型。首先,建立风险评价指标体系;其次,应用层次分析法确定风险评价指标权重、模... 针对装配式项目在应用BIM技术时可能存在的风险与不确定性,将层次分析法与模糊综合评价相结合,建立基于模糊层次分析法的装配式项目应用BIM技术风险评价模型。首先,建立风险评价指标体系;其次,应用层次分析法确定风险评价指标权重、模糊综合评价建立风险评价模型;最后,经实证研究,应用该风险评价模型对装配式项目应用BIM技术进行风险因素分析及风险等级评定,为装配式项目应用BIM技术进行风险管理研究提供了方法借鉴。 展开更多
关键词 层次分析法 模糊综合评价 BIM技术 装配式项目
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Real time monitoring of bioreactor mAb IgG3 cell culture process dynamics via Fourier transform infrared spectroscopy: Implications for enabling cell culture process analytical technology
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作者 Huiquan Wu Erik Read +4 位作者 Maury White Brittany Chavez Kurt Brorson Cyrus Agarabi Mansoor Khan 《Frontiers of Chemical Science and Engineering》 SCIE EI CAS CSCD 2015年第3期386-406,共21页
Compared to small molecule process analytical technology (PAT) applications, biotechnology product PAT applications have certain unique challenges and opportunities. Understanding process dynamics of bioreactor cell... Compared to small molecule process analytical technology (PAT) applications, biotechnology product PAT applications have certain unique challenges and opportunities. Understanding process dynamics of bioreactor cell culture process is essential to establish an appropriate process control strategy for biotechnology product PAT applications. Inline spectroscopic techniques for real time monitoring of bioreactor cell culture process have the distinct potential to develop PAT approaches in manufac- turing biotechnology drug products. However, the use of inline Fourier transform infrared (FTIR) spectroscopic techniques for bioreactor cell culture process monitoring has not been reported. In this work, real time inline FTIR Spectroscopy was applied to a lab scale bioreactor mAb IgG3 cell culture fluid biomolecular dynamic model. The technical feasibility of using FTIR Spectroscopy for real time tracking and monitoring four key cell culture metabolites (including glucose, glutamine, lactate, and ammonia) and protein yield at increasing levels of complexity (simple binary system, fully formulated media, actual bioreactor cell culture process) was evaluated via a stepwise approach. The FTIR fingerprints of the key metabolites were identified. The multivariate partial least squares (PLS) calibration models were established to correlate the process FTIR spectra with the concentrations of key metabolites and protein yield of in-process samples, either individually for each metabolite and protein or globally for all four metabolites simultaneously. Applying the 2'ld derivative pre-processing algorithm to the FTIR spectra helps to reduce the number of PLS latent variables needed significantly and thus simplify the interpretation of the PLS models. The validated PLS models show promise in predicting the concentration profiles of glucose, glutamine, lactate, and ammonia and protein yield over the course of the bioreactor cell culture process. Therefore, this work demonstrated the technical feasibility of real time monitoring of the bioreactor cell culture process via FTIR spectroscopy. Its implications for enabling cell culture PAT were discussed. 展开更多
关键词 process analytical technology (pat Fouriertransform infrared (FTIR) spectroscopy partial least squares (PLS) regression mouse IgG3 bioreactor cell culture process real time process monitoring
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苦参-黄柏药对的提取工艺研究 被引量:1
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作者 管咏梅 陶颖 +5 位作者 邹成玉 臧振中 陈丽华 刘丽丽 陈丽梅 朱卫丰 《中国药房》 CAS 北大核心 2024年第7期793-800,共8页
目的研究苦参-黄柏药对的提取工艺,为治疗肛肠疾病的新药开发提供参考依据。方法以苦参总碱(苦参碱+氧化苦参碱)含量、盐酸小檗碱含量、总黄酮含量及浸膏得率为评价指标,采用层次分析法-熵权法计算各指标权重系数,结合Box-Behnken设计-... 目的研究苦参-黄柏药对的提取工艺,为治疗肛肠疾病的新药开发提供参考依据。方法以苦参总碱(苦参碱+氧化苦参碱)含量、盐酸小檗碱含量、总黄酮含量及浸膏得率为评价指标,采用层次分析法-熵权法计算各指标权重系数,结合Box-Behnken设计-响应面法研究苦参-黄柏药对的最佳提取工艺并进行验证。结果苦参-黄柏药对的最优提取工艺为以12倍量58%乙醇浸泡30 min后提取2次,每次120 min。验证实验结果与预测值的相对误差为1.88%。结论所得提取工艺稳定、可行,可为苦参-黄柏药对的进一步应用与新药开发提供参考。 展开更多
关键词 苦参 黄柏 药对 BOX-BEHNKEN设计 响应面法 提取工艺 层次分析法 熵权法 痔疮
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基于可燃物特征的塞罕坝林场人工林小班森林火险区划
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作者 丁永全 李笑笑 +6 位作者 赵凤君 司莉青 舒立福 闫凯达 张建华 彭志杰 周暖阳 《林业科学》 EI CAS CSCD 北大核心 2024年第11期107-118,共12页
【目的】以塞罕坝机械林场为例,建立一种基于可燃物特征的森林火险区划方法,为林场尺度火险区划提供借鉴。【方法】选取15个火险影响因子,运用层次分析法(AHP)、专家打分法和判断矩阵法获得小班尺度引燃危险、火强度危险和综合火险的因... 【目的】以塞罕坝机械林场为例,建立一种基于可燃物特征的森林火险区划方法,为林场尺度火险区划提供借鉴。【方法】选取15个火险影响因子,运用层次分析法(AHP)、专家打分法和判断矩阵法获得小班尺度引燃危险、火强度危险和综合火险的因子权重,以小班调查数据和可燃物理化性质测定数据为基础,计算每个小班的引燃危险指数、火强度危险指数和综合火险指数;采用聚类分析法和ArcGIS技术,得到林场内引燃危险、火强度危险和综合火险的等级区划图,分析林场区域的火灾发生危险性。【结果】1)在塞罕坝机械林场,引燃危险等级极高(Ⅴ_(Y))区域面积占林场总面积的9.21%,主要零散分布于林场西部、南部和中部;高(Ⅳ_(Y))和较高等级(Ⅲ_(Y))分布区域较广,全区均有分布,较高以上等级(Ⅲ_(Y)、Ⅳ_(Y)、Ⅴ_(Y))面积占比67.95%。2)火强度危险极高等级(Ⅴ_(Q))面积最大,占林场总面积的46.42%,其次是高等级(Ⅳ_(Q)),面积占比26.38%,二者面积之和占比72.8%,集中在林场南部和西部;较高等级(Ⅲ_(Q))面积占比7.95%,主要分布在东部。3)综合火险等级高(Ⅳ_(Z))和较高(Ⅲ_(Z))面积占比大,分别为29.07%和28.12%;极高等级(Ⅴ_(Z))面积占比也达19.13%;较高以上等级(Ⅲ_(Z)、Ⅳ_(Z)、Ⅴ_(Z))区域面积总占比为76.32%,主要分布于林场西部、南部和中部。【结论】基于层次分析法、聚类分析法和ArcGIS技术的火险区划方法,能在小班尺度很好地进行森林火险分类,得到引燃危险、火强度危险和综合火险区划,对林场等级的可燃物管理有参考价值。塞罕坝机械林场综合火险等级很高,特别是西部、南部和中部;林场火强度危险等级极高(Ⅴ_(Q))和高(Ⅳ_(Q))的区域面积很大,一旦着火极易引发高强度森林火灾。引燃危险等级高和火强度危险等级高的区域并不完全重合,需在引燃危险等级高的区域内加强火源管理和易燃可燃物管理,降低火发生概率,建议在火强度危险等级高的区域和引燃危险等级高的区域之间规划隔离带,以有效阻滞可能发生的林火向火强度危险等级高的区域快速蔓延,防控大火巨灾发生。 展开更多
关键词 层次分析法 ArcGIS技术 森林可燃物 危险性 区划
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