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Journal of biochemical toxicology最新文献

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Voltage gradient and resolution in zone electrophoresis 区带电泳的电压梯度和分辨率
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270611
J. Ewart
{"title":"Voltage gradient and resolution in zone electrophoresis","authors":"J. Ewart","doi":"10.1002/JBT.2570270611","DOIUrl":"https://doi.org/10.1002/JBT.2570270611","url":null,"abstract":"A theoretical equation connecting resolution in zone electrophoresis with other variables has been derived, and, in particular, resolution has been shown to be approximately proportional to the square root of the potential gradient. Some common troubles affecting resolution in zone electrophoresis are illustrated.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"77 1","pages":"700-703"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72966074","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
Studies on sodium silicate solutions by the method of trimethylsilylation 硅酸钠溶液的三甲基硅基化研究
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270108
L. Glasser, E. Lachowski, G. G. Cameron
{"title":"Studies on sodium silicate solutions by the method of trimethylsilylation","authors":"L. Glasser, E. Lachowski, G. G. Cameron","doi":"10.1002/JBT.2570270108","DOIUrl":"https://doi.org/10.1002/JBT.2570270108","url":null,"abstract":"The method of trimethylsilylation was used to study anion distributions in sodium silicate solutions with Na2O: SiO2 ratios of 1:1 and 1:3.41 at various concentrations. The polysiloxanes produced were characterised, mainly by g.l.c., g.p.c. and C and H analyses, to give a picture of the anion distribution in the original solution. The results were compared with those from previous studies. The observations of earlier workers—that the degree of polymerisation increases with increasing concentration and decreasing soda:silica ratio—were confirmed.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"46 2 1","pages":"39-47"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75939667","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: 23
Prediction of costs in continuous fermentations 连续发酵的成本预测
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270138
A. Trilli
{"title":"Prediction of costs in continuous fermentations","authors":"A. Trilli","doi":"10.1002/JBT.2570270138","DOIUrl":"https://doi.org/10.1002/JBT.2570270138","url":null,"abstract":"From a development of the theory of the cost of continuous fermentations, the unit cost of any given product (e.g. biomass, primary or secondary metabolites) as a function of time can be predicted. For any given system there is a particular value of the dilution rate at which the unit cost of product will not change with fermentation time. At dilution rates higher than the critical one the unit cost of growth-linked products (e.g. biomass) will decrease with time, while that of non-growth-linked products (e.g. penicillin) will increase with time. The converse will happen at lower dilution rates. In all cases the unit cost will tend towards a finite, fixed value. Two numerical examples are presented and the relevance of these findings to the problem of estimating a priori the convenience of a continuous fermentation process is discussed.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"216 1","pages":"251-259"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77561210","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: 8
Effect of the method of preparation and pretreatment on the texture of alumina and related catalysts 制备及预处理方法对氧化铝及相关催化剂织构的影响
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270127
M. Ravindram, K. S. Murty
{"title":"Effect of the method of preparation and pretreatment on the texture of alumina and related catalysts","authors":"M. Ravindram, K. S. Murty","doi":"10.1002/JBT.2570270127","DOIUrl":"https://doi.org/10.1002/JBT.2570270127","url":null,"abstract":"The effect of the method of preparation and pretreatment on catalyst texture was investigated in the case of alumina, silica-alumina, 10 × molecular sieve and thoria catalysts. All the catalysts were characterised with respect to their specific surface area, surface acidity, pore size distribution and pore volume. The above properties were found to reflect the textural changes that might have been undergone by the catalyst surface as a result of the method of preparation and pretreatment. The method of preparation was found to influence markedly the acidity of the surface and to a lesser extent the surface area and pore size distribution. Acid-treatment was found to increase selectively the acidity of the catalyst while heat-treatment was found to decrease proportionally the acidity as well as surface area of the catalyst.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"1 1","pages":"181-190"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82989704","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
The H2ONaCl–sucrose phase diagram and applications in cryobiology 硫酸-蔗糖相图及其在低温生物学中的应用
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270505
F. W. Gayle, F. Cocks, M. L. Shepard
{"title":"The H2ONaCl–sucrose phase diagram and applications in cryobiology","authors":"F. W. Gayle, F. Cocks, M. L. Shepard","doi":"10.1002/JBT.2570270505","DOIUrl":"https://doi.org/10.1002/JBT.2570270505","url":null,"abstract":"The liquidus surface of the primary ice phase field of the H2ONaCl–sucrose ternary system has been determined by differential thermal analysis (d.t.a.) techniques. Except in the region of high sucrose concentrations, the line of two-fold saturation bounding this field also was determined. Non-equilibrium glassy phases were formed throughout the system. The degree of metastability of these phases increases with sucrose concentration. At high sucrose levels, the metastability was such that detection of the line of two-fold saturation was precluded. In general, it was found that sucrose was less effective on a weight percent basis than dimethyl sulphoxide and glycerol in depressing the melting point of primary ice and, consequently, less effective in suppressing salt concentration effects at low temperatures in the liquid phase which is residual to primary ice formation.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"1 1","pages":"599-607"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90623175","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: 20
Industrial brine production using power station waste heat to assist solar evaporation of sea water 利用发电站废热辅助太阳能蒸发海水的工业卤水生产
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270609
S. Fellows, H. Rothbaum
{"title":"Industrial brine production using power station waste heat to assist solar evaporation of sea water","authors":"S. Fellows, H. Rothbaum","doi":"10.1002/JBT.2570270609","DOIUrl":"https://doi.org/10.1002/JBT.2570270609","url":null,"abstract":"The rate of evaporation from a slightly heated pond of sea water, over and above the rate from an unheated control pond, has been found to be about 5.6 m of depth per year, for each kW/m2 of heat density applied. In winter about 40%, and in summer about 55%, of the added heat goes to increasing evaporation. In conjunction with local data on rainfall and natural evaporation, this value can be used to predict the net evaporation from a heated pond at a chosen site. If a power station in the Auckland area had sea water cooling ponds of the usual size, the combination of natural evaporation, rainfall, and evaporation due to heating would result in a net evaporation of 1.02 m per year and production of a concentrated brine containing at least 200 000 tonnes per year of salt, for a 1400 MWe power station. The degree of concentration allowed in the cooling pond is limited by the formation of scale in the condensers. By adding trisodium phosphate (obtainable cheaply in New Zealand from a low quality phosphate ore) and ammonium chloride to the brine, the scale-forming calcium and magnesium can be precipitated as a mixture of metal phosphates and metal ammonium phosphates. The precipitate has potential value as a high-analysis fertiliser or a cattle feed supplement. At the same time a non-scaling brine is produced, which can safely be concentrated five-fold in a power station cooling pond. The brine is then suitable as feed for a caustic/chlorine electrolysis plant. A portion of the caustic soda product must be recycled to the preparation of the trisodium phosphate.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"172 1","pages":"685-695"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76766277","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: 1
Use of Hildebrand and Lamoreaux's theory to predict solubility and related properties of gas-liquid systems 利用希尔德布兰德和拉莫罗理论预测气液体系的溶解度和相关性质
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270308
R. Linford, David G. T. Thornhill
{"title":"Use of Hildebrand and Lamoreaux's theory to predict solubility and related properties of gas-liquid systems","authors":"R. Linford, David G. T. Thornhill","doi":"10.1002/JBT.2570270308","DOIUrl":"https://doi.org/10.1002/JBT.2570270308","url":null,"abstract":"There is a need in many fields such as chemical engineering, process chemistry and pharmacology for reliable data on the solubility, entropy of solution and partial molar volume of gases in liquids. Experimental data are not available for many systems of practical and academic importance and consequently a reliable theory to predict values for these properties would be of great use. Recent refinements of solubility parameter theory have been successful in predicting such values for several systems and in this paper results obtained from this theory are compared with experimental measurements on a large range of gas-liquid systems. The agreement found is satisfactory in the most part, but for helium, neon, xenon, hydrogen and deuterium, the predicted results deviate consistently from the experimental values. This is to be expected on the basis of some of the earlier results of solubility parameter theory and an empirical modification is proposed that yields significant improvements in the predicted values. This has also been used to predict values for carbon dioxide, tetrafluoromethane and sulphur hexafluoride to which the theory is not directly applicable. Values predicted by solubility parameter theory are compared with those obtained by Battino and co-workers from scaled particle theory. In general, the two theories are equally successful in predicting solubilities, but refined solubility parameter theory yields better values of entropy of solution. It is concluded that the theory provides a useful means of predicting solubility and entropy of solution but that prediction of partial molar volume results is limited because of the paucity of data for the thermal pressure coefficients of the solvents. Attention is drawn to apparent inaccuracies in certain experimental measurements. The interrelationship between the various forms of the entropy of solution used by different workers is clarified. A value of the energy of vaporisation of carbon dioxide, δE2v=2.64±0.15 kcal/mol is calculated.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"45 1","pages":"479-497"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72746061","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: 9
Study of thermochromic behaviour of some indolinobenzospiropyrans by infrared spectroscopy 红外光谱法研究吲哚胺苯并螺吡喃类化合物的热致变色行为
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270133
A. Bertoluzza, C. Concilio, P. Finelli
{"title":"Study of thermochromic behaviour of some indolinobenzospiropyrans by infrared spectroscopy","authors":"A. Bertoluzza, C. Concilio, P. Finelli","doi":"10.1002/JBT.2570270133","DOIUrl":"https://doi.org/10.1002/JBT.2570270133","url":null,"abstract":"The thermochromic behaviour of some indolinobenzospiropyrans was studied by heating solid compounds in K Br. Changes in i.r. spectra are interpreted as being due to the formation of a pseudoquinonic structure, (V).","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"29 1","pages":"225-228"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74025024","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 decomposition of uranyl chloride hydrate 水合物氯化铀酰的热分解
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270141
Taichi Sato, S. Shiota, S. Ikoma, Fusaji Ozawa
{"title":"Thermal decomposition of uranyl chloride hydrate","authors":"Taichi Sato, S. Shiota, S. Ikoma, Fusaji Ozawa","doi":"10.1002/JBT.2570270141","DOIUrl":"https://doi.org/10.1002/JBT.2570270141","url":null,"abstract":"The thermal decomposition of uranyl chloride hydrate has been investigated by thermal analyses, X-ray diffraction and infrared spectroscopy. From the results it is concluded that uranyl chloride hydrate decomposes thermally as follows: \u0000 \u0000 \u0000 \u0000 \u0000 \u0000 \u0000.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"3 1","pages":"275-280"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91075801","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
A new method for the purification of Egyptian cotton waste fibres 一种提纯埃及废棉纤维的新方法
Journal of biochemical toxicology Pub Date : 2007-05-29 DOI: 10.1002/JBT.2570270206
M. A. Abou-State, B. Awad, F. F. A. El-Megeid
{"title":"A new method for the purification of Egyptian cotton waste fibres","authors":"M. A. Abou-State, B. Awad, F. F. A. El-Megeid","doi":"10.1002/JBT.2570270206","DOIUrl":"https://doi.org/10.1002/JBT.2570270206","url":null,"abstract":"A new pulping method using sodium nitrate was successfully used for the purification of Egyptian cotton waste fibres. Sodium nitrate alone, sodium nitrate in nitric acid solution and sodium nitrate in sodium hydroxide solution were used in pulping. The chemical, physical and sub-microscopic characteristics of the pulps obtained and their reactivity towards xanthation were estimated. The best results were obtained when a mixture of sodium nitrate and nitric acid were used in pulping.","PeriodicalId":15255,"journal":{"name":"Journal of biochemical toxicology","volume":"34 1","pages":"405-408"},"PeriodicalIF":0.0,"publicationDate":"2007-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84419202","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
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