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Journal of biochemical toxicology最新文献

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A phase model for the gas–liquid equilibria in the ammonia–carbon dioxide–water–urea system in chemical equilibrium at urea synthesis conditions. I. Theory 尿素合成条件下氨-二氧化碳-水-尿素化学平衡气液平衡的相模型。我的理论。
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270148
S. Lemkowitz, G. Diepen, P. Berg
{"title":"A phase model for the gas–liquid equilibria in the ammonia–carbon dioxide–water–urea system in chemical equilibrium at urea synthesis conditions. I. Theory","authors":"S. Lemkowitz, G. Diepen, P. Berg","doi":"10.1002/JBT.2570270148","DOIUrl":"https://doi.org/10.1002/JBT.2570270148","url":null,"abstract":"A ternary phase model of the reciprocal salt-pair type (square composition plane) is presented to describe the gas–liquid equilibria of the ammonia–carbon dioxide–water–urea system in chemical equilibrium at urea synthesis conditions. The components of the model are CO2, H2O and (2NH3). Urea is represented by the equation:. \u0000 \u0000 \u0000 \u0000 \u0000 \u0000 \u0000 \u0000 \u0000and is therefore located at the corner of the composition square diagonally opposed to water. Characteristic of this phase model (at constant temperature) is the occurrence of minimum bubble- and dew-points in planes located parallel to the (2NH3)-CO2 diagonal. The point of tangency of the bubble- and dew-point lines formed by these points forms the ternary azeotropic point. Intercepting the azeotropic point is a plane parallel to the urea–water diagonal; at the azeotropic point the bubble-point line in this plane reaches a maximum pressure value. The ternary azeotrope is of the saddle type.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"3 1","pages":"327-334"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80206556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Rapid qualitative identification of sulphonamides by mass spectrometry 质谱法快速定性鉴定磺胺类化合物
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270408
Reg. Davis, D. T. Hurst, Albert R. Taylor
{"title":"Rapid qualitative identification of sulphonamides by mass spectrometry","authors":"Reg. Davis, D. T. Hurst, Albert R. Taylor","doi":"10.1002/JBT.2570270408","DOIUrl":"https://doi.org/10.1002/JBT.2570270408","url":null,"abstract":"Rapid qualitative identification of the sulphonamides present in pharmaceutical preparations is conveniently carried out using mass spectrometry. Direct introduction of a small quantity of the powdered tablet into the mass spectrometer results in the production of characteristic ions even in preparations containing a mixture of therapeutically active constituents and without prior separation of the various constituents.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"25 1","pages":"543-548"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79658619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Homogeneous and two phase sulphonation of some aromatic hydrocarbons 一些芳烃的均相和两相磺化反应
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270305
M. Sohrabi, T. Kaghazchi, C. Hanson
{"title":"Homogeneous and two phase sulphonation of some aromatic hydrocarbons","authors":"M. Sohrabi, T. Kaghazchi, C. Hanson","doi":"10.1002/JBT.2570270305","DOIUrl":"https://doi.org/10.1002/JBT.2570270305","url":null,"abstract":"","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"77 1","pages":"453-458"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87052963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Grindability of some additions and its significance in the production of mixed cements 某些掺合料的可磨性及其在混合水泥生产中的意义
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270105
K. M. Hanna, A. Afify
{"title":"Grindability of some additions and its significance in the production of mixed cements","authors":"K. M. Hanna, A. Afify","doi":"10.1002/JBT.2570270105","DOIUrl":"https://doi.org/10.1002/JBT.2570270105","url":null,"abstract":"Grinding tests were conducted in a laboratory steel ball mill, to investigate the grindability of some natural and artificial materials as \"additions\" for incorporation in portland cement. Strength tests were performed on mixed cements composed of 71% portland cement clinker, 25% addition and 4% gypsum. In one series of experiments, the components of the mixed cement were separately ground and in another one they were simultaneously ground. It was found from surface production curves and from compressive strength data that when materials which are harder to grind than clinker such as sand are interground with clinker, the resulting cement develops higher early strength than a corresponding cement in which the pozzolanic addition is softer than clinker. For materials which are softer to grind than clinker, separate grinding of the cement components is better than combined grinding, particularly for the development of early strength. /Author/TRRL/","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"6 1","pages":"25-29"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88348656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method for the determination of oxygen transfer coefficients (KLa) with the correction for the actual cultivation conditions 氧传递系数(KLa)的测定方法及对实际栽培条件的修正
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270123
J. Páca, V. Grégr
{"title":"Method for the determination of oxygen transfer coefficients (KLa) with the correction for the actual cultivation conditions","authors":"J. Páca, V. Grégr","doi":"10.1002/JBT.2570270123","DOIUrl":"https://doi.org/10.1002/JBT.2570270123","url":null,"abstract":"A method for determination of the volumetric oxygen transfer coefficient KLa from dynamic measurement data under conditions of both excess oxygen and oxygen-limited growth of microorganisms is described. The KLa determination follows from the integrated form of the oxygen balance equation and involves a correction for the actual cultivation conditions during measurement.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"100 1","pages":"155-164"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80586054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Competition for double growth-limiting nutrients in continuous culture 连续培养中对双重生长限制养分的竞争
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270139
H. Yoon, H. Blanch
{"title":"Competition for double growth-limiting nutrients in continuous culture","authors":"H. Yoon, H. Blanch","doi":"10.1002/JBT.2570270139","DOIUrl":"https://doi.org/10.1002/JBT.2570270139","url":null,"abstract":"Competition between two microorganisms in continuous culture for multiple substrates is examined. The competitive elimination principle of Gauss applies when two organisms compete for one growth-limiting substrate. If two substrates are present, and microbial growth depends on both (double substrate limitation), then both organisms may coexist in a stable steady state. The range of microbial parameters over which this steady state occurs is examined.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"40 1","pages":"260-268"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89815567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Cohesive energy density of polar and non-polar liquids 极性和非极性液体的内聚能密度
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270306
B. S. Rawat, I. B. Gulati
{"title":"Cohesive energy density of polar and non-polar liquids","authors":"B. S. Rawat, I. B. Gulati","doi":"10.1002/JBT.2570270306","DOIUrl":"https://doi.org/10.1002/JBT.2570270306","url":null,"abstract":"The cohesive energy densities of polar and non-polar liquids have been correlated with new parameters, estimation of which need no experimental data. The correlation has been tested for nine different series of compounds using data reported in the literature. The maximum deviation is found to be less than 2.5%.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"42 1","pages":"459-464"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89039703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ce(III), Th(IV) and U(VI) chelates of alizarin viridine, alizarin heliotrope and alizarin maroon 茜素绿嘌呤、茜素向日葵和茜素栗色的Ce(III)、Th(IV)和U(VI)螯合物
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270409
K. A. Idriss, I. M. Issa, M. M. Seleim
{"title":"Ce(III), Th(IV) and U(VI) chelates of alizarin viridine, alizarin heliotrope and alizarin maroon","authors":"K. A. Idriss, I. M. Issa, M. M. Seleim","doi":"10.1002/JBT.2570270409","DOIUrl":"https://doi.org/10.1002/JBT.2570270409","url":null,"abstract":"The complexes of 7,8-dihydroxy-1,4-di(2′-sulpho-4′-methylanilano)anthraquinone (alizarin viridine); 1,4-dihydroxy-2(2′-sulpho-4′-methylanilino)anthraquinone (alizarin heliotrope) and 3-amino-1,2-dihydroxyanthraquinone (alizarin maroon) with Ce(III), Th(IV) and U(VI) have been investigated using spectrophotometric and conductometric methods. The study revealed the formation of complexes having the metal: ligand ratios 1:1 and 1:2. The values of log β* for the different complexes are determined. The structure of the ligands in the solid chelates were studied by i.r. spectrophotometry which showed that chelate formation takes place through the CO and neighbouring OH group and leads to proton displacement.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"22 1","pages":"549-557"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75112061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Thermal treatment of Aerosil OX50: Pore structure and heats of immersion Aerosil OX50的热处理:孔隙结构和浸没热
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270104
R. Mikhail, A. Khalil, S. Nashed
{"title":"Thermal treatment of Aerosil OX50: Pore structure and heats of immersion","authors":"R. Mikhail, A. Khalil, S. Nashed","doi":"10.1002/JBT.2570270104","DOIUrl":"https://doi.org/10.1002/JBT.2570270104","url":null,"abstract":"Degussa Aerosil OX50 was thermally treated in vacuo, in the temperature range 20–1000°C. Effects of thermal treatment on the water contents, specific surface areas, pore structure and heats of immersion in water were investigated and discussed. Thermogravimetric analysis was used to select the temperatures of thermal treatment which reflect the various textural changes resulting from the heat effects. It could be shown that the heats of immersion in water depend on both the water content of the sample (molecular water and/or surface hydroxyls) and on the surface texture of the silica gel, that is, the pore structure. The interesting result obtained is that the heat of immersion in water is partly proportional to the mesopore fraction of the surface. Micropores lead to a decrease in the heat of immersion in water.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"82 1","pages":"17-24"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75966665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Mechanism of light fading of dyes on cellophane and poly(ethylene terephthalate) 染料在玻璃纸和聚对苯二甲酸乙酯上的光褪色机理
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270302
C. D. Shah, R. Srinivasan
{"title":"Mechanism of light fading of dyes on cellophane and poly(ethylene terephthalate)","authors":"C. D. Shah, R. Srinivasan","doi":"10.1002/JBT.2570270302","DOIUrl":"https://doi.org/10.1002/JBT.2570270302","url":null,"abstract":"Studies of relative rates of fading of dyes and Hammett σ-value of substituents in their molecules lead to further evidence that fading of azo dyes on Cellophane and poly-(ethylene terephthalate) is probably an oxidation type of reaction. Absorption spectra of the same dye on these two substrates tend to indicate a very high state of aggregation of dyes on Cellophane as compared to that on poly(ethylene terephthalate).","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"51 1","pages":"429-436"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79798295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
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