Refractory materials have been widely used in high-temperature industries,in which the boron content has a great influence on the performance.To control the detection quality and satisfy the requirement of production ...Refractory materials have been widely used in high-temperature industries,in which the boron content has a great influence on the performance.To control the detection quality and satisfy the requirement of production and scientific research of refractories,conditional tests involving three methods for the boron determination(alkali titrimetry,inductively coupled plasma atomic emission spectrometry(ICP-AES),and curcumin absorption spectrophotometry)were carried out in this work.The affecting factors on the determination of boron were analyzed and discussed by performing the experiment.The results show that compared with curcumin absorption spectrophotometry,alkali titrimetry and ICP-AES have the advantages of simple operation,quick analysis and high precision(relative standard deviation<5%),which are more appropriate for boron determination in refractories.展开更多
Objective:The aim of this study was to clarify the differences between the prostatic levels of chemical elements in patients with benign prostatic hyperplasia(BPH)and healthy male.Methods:We evaluated the prostatic le...Objective:The aim of this study was to clarify the differences between the prostatic levels of chemical elements in patients with benign prostatic hyperplasia(BPH)and healthy male.Methods:We evaluated the prostatic level of 66 chemical elements in 43 patients with BPH and 37 healthy males.Measurements were performed using five instrumental analytical methods.Results:In the hyperplastic prostates,we have observed a significant increase in the mean level of Bi,Cr,Hg,K,Sb,and Se accompanied a significant decrease in the mean level of Al,Ce,Cs,Dy,Er,Gd,Ho,La,Mo,Nd,Pb,Pr,Sm,Sn,Tb,Tm,U,and Y.No differences were found in the mean prostatic level of other chemical elements including Ag,Al,Au,B,Ba,Be,Br,Ca,Cd,Co,Cu,Fe,Li,Mg,Mn,Na,Nb,Ni,P,Rb,S,Sc,Si,Th,Ti,Tl,Yb,Zn,and Zr between BPH patients and healthy males.Conclusions:The finding of chemical element contents and correlation between pairs of chemical element mass fractions indicates that there is a great disturbance of prostatic chemical element metabolism in BPH gland.Trace elements Bi,Cr,Hg,K,Sb,and Se may be regarded as the possible tissue biomarkers of hyperplastic transformation of prostate gland.Obtained data did not confirm a critical role of Cd and Pb accumulation in the pathogenesis of BPH.A potential age-related Zn,Fe,and Se deficiency in the prostate tissue has not been found as being involved in the etiology of BPH.展开更多
Aim:Thyroid cancer is an internationally important health problem.The aim of this exploratory study was to evaluate whether significantchanges in the thyroid tissue levels of Al,B,Ba,Br,Ca,Cl,Cu,Fe,I,K,Li,Mg,Mn,Na,P,S...Aim:Thyroid cancer is an internationally important health problem.The aim of this exploratory study was to evaluate whether significantchanges in the thyroid tissue levels of Al,B,Ba,Br,Ca,Cl,Cu,Fe,I,K,Li,Mg,Mn,Na,P,S,Si,Sr,V,and Zn exist in the malignantly transformed thyroid.Methods:Thyroid tissue levels of twenty chemical elements were prospectively evaluated in 41 patients with thyroid malignant tumors and 105 healthy inhabitants.Measurements were performed using a combination of non-destructive and destructive methods:instrumental neutron activation analysis and inductively coupled plasma atomic emission spectrometry,respectively.Tissue samples were divided into two portions.One was used for morphological study while the other was intended for trace element analysis.Results:It was found that contents of Al,B,Br,Ca,Cl,Cu,K,Mg,Mn,Na,P,S,and Si were significantly higher(approximately 3.2,4.6,9.3,1.8,2.3,3.6,1.6,1.6,1.6,1.2,2.5,1.1,and 2.8 times,respectively)while content of I lower(nearly 26 times)in cancerous tissues than in normal tissues.Conclusion:There are considerable changes in chemical element contents in the malignantly transformed tissue of thyroid.展开更多
文摘Refractory materials have been widely used in high-temperature industries,in which the boron content has a great influence on the performance.To control the detection quality and satisfy the requirement of production and scientific research of refractories,conditional tests involving three methods for the boron determination(alkali titrimetry,inductively coupled plasma atomic emission spectrometry(ICP-AES),and curcumin absorption spectrophotometry)were carried out in this work.The affecting factors on the determination of boron were analyzed and discussed by performing the experiment.The results show that compared with curcumin absorption spectrophotometry,alkali titrimetry and ICP-AES have the advantages of simple operation,quick analysis and high precision(relative standard deviation<5%),which are more appropriate for boron determination in refractories.
文摘Objective:The aim of this study was to clarify the differences between the prostatic levels of chemical elements in patients with benign prostatic hyperplasia(BPH)and healthy male.Methods:We evaluated the prostatic level of 66 chemical elements in 43 patients with BPH and 37 healthy males.Measurements were performed using five instrumental analytical methods.Results:In the hyperplastic prostates,we have observed a significant increase in the mean level of Bi,Cr,Hg,K,Sb,and Se accompanied a significant decrease in the mean level of Al,Ce,Cs,Dy,Er,Gd,Ho,La,Mo,Nd,Pb,Pr,Sm,Sn,Tb,Tm,U,and Y.No differences were found in the mean prostatic level of other chemical elements including Ag,Al,Au,B,Ba,Be,Br,Ca,Cd,Co,Cu,Fe,Li,Mg,Mn,Na,Nb,Ni,P,Rb,S,Sc,Si,Th,Ti,Tl,Yb,Zn,and Zr between BPH patients and healthy males.Conclusions:The finding of chemical element contents and correlation between pairs of chemical element mass fractions indicates that there is a great disturbance of prostatic chemical element metabolism in BPH gland.Trace elements Bi,Cr,Hg,K,Sb,and Se may be regarded as the possible tissue biomarkers of hyperplastic transformation of prostate gland.Obtained data did not confirm a critical role of Cd and Pb accumulation in the pathogenesis of BPH.A potential age-related Zn,Fe,and Se deficiency in the prostate tissue has not been found as being involved in the etiology of BPH.
文摘Aim:Thyroid cancer is an internationally important health problem.The aim of this exploratory study was to evaluate whether significantchanges in the thyroid tissue levels of Al,B,Ba,Br,Ca,Cl,Cu,Fe,I,K,Li,Mg,Mn,Na,P,S,Si,Sr,V,and Zn exist in the malignantly transformed thyroid.Methods:Thyroid tissue levels of twenty chemical elements were prospectively evaluated in 41 patients with thyroid malignant tumors and 105 healthy inhabitants.Measurements were performed using a combination of non-destructive and destructive methods:instrumental neutron activation analysis and inductively coupled plasma atomic emission spectrometry,respectively.Tissue samples were divided into two portions.One was used for morphological study while the other was intended for trace element analysis.Results:It was found that contents of Al,B,Br,Ca,Cl,Cu,K,Mg,Mn,Na,P,S,and Si were significantly higher(approximately 3.2,4.6,9.3,1.8,2.3,3.6,1.6,1.6,1.6,1.2,2.5,1.1,and 2.8 times,respectively)while content of I lower(nearly 26 times)in cancerous tissues than in normal tissues.Conclusion:There are considerable changes in chemical element contents in the malignantly transformed tissue of thyroid.
