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Progress in the Study on the Phase Equilibria of the CO2·H2O and CO2-HeO-NaCI Systems 被引量:6
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作者 吉远辉 吉晓燕 +3 位作者 冯新 刘畅 吕玲红 陆小华 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2007年第3期439-448,共10页
To study the feasibility of CO2 geological sequestration,it is needed to understand the complicated mul- tiple-phase equilibrium and the densities of aqueous solution with CO2 and multi-ions under wide geological cond... To study the feasibility of CO2 geological sequestration,it is needed to understand the complicated mul- tiple-phase equilibrium and the densities of aqueous solution with CO2 and multi-ions under wide geological condi- tions(273.15—473.15K,0—60MPa),which are also essential for designing separation equipments in chemical or oil-related industries.For this purpose,studies on the relevant phase equilibria and densities are reviewed and ana- lyzed and the method to improve or modify the existing model is suggested in order to obtain more reliable pre- dictions in a wide temperature and pressure range.Besides,three different models(the electrolyte non random two-liquid(ELECNRTL),the electrolyte NRTL combining with Helgeson model(ENRTL-HG),Pitzer activity co- efficient model combining with Helgeson model(PITZ-HG))are used to calculate the vapor-liquid phase equilib- rium of CO2-H2O and CO2-H2O-NaCl systems.For CO2-H2O system,the calculation results agree with the experi- mental data very well at low and medium pressure(0—20MPa),but there are great discrepancies above 20MPa.For the water content at 473.15K,the calculated results agree with the experimental data quite well.For the CO2-H2O-NaCl system,the PITZ-HG model show better results than ELECNRTL and ENRTL-HG models at the NaCl concentration of 0.52mol·L -1 .Bur for the NaCl concentration of 3.997mol·L -1 ,using the ELECNRTL and ENRTL-HG models gives better results than using the PITZ-HG model.It is shown that available experimental data and the thermodynamic calculations can satisfy the needs of the calculation of the sequestration capacity in the temperature and pressure range for disposal of CO2 in deep saline aquifers.More experimental data and more accu- rate thermodynamic calculations are needed in high temperature and pressure ranges(above 398.15K and 31.5MPa). 展开更多
关键词 CO2-H2O CO2-H2O-NaCl high temperature high pressure phase equilibrium DENSITY
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Effects of water temperature and dietary carbohydrate levels on growth and energy budget of juvenile Litopenaeus vannamei 被引量:4
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作者 王兴强 马甡 董双林 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2006年第3期318-324,共7页
A 3×3 factorial experiment was conducted to determine the effects of water temperature (22 ℃, 27℃ and 32℃) and dietary carbohydrate (CBH) levels (15.47%, 29.15% and 41.00%) on growth, food consumption, feed ef... A 3×3 factorial experiment was conducted to determine the effects of water temperature (22 ℃, 27℃ and 32℃) and dietary carbohydrate (CBH) levels (15.47%, 29.15% and 41.00%) on growth, food consumption, feed efficiency, apparent digestibility coefficient and energy budget of juvenile Lito- penaeus vannamei. The results showed that, at each dietary CBH level, specific growth rate, food con- sumption and apparent digestibility coefficient generally increased, while feed efficiency decreased with increasing water temperatures. Specific growth rate and food consumption were the highest in the shrimps fed with diet of 29.15% CBH, closely followed by those with 15.47% CBH, and those with 41.00% CBH had the lowest value. 展开更多
关键词 Litopenaeus vannamei water temperature CARBOHYDRATE GROWTH energy budget
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Hepatic expression and cellular distribution of the glucose transporter family 被引量:5
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作者 Sumera Karim David H Adams Patricia F Lalor 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第46期6771-6781,共11页
Glucose and other carbohydrates are transported into cells using members of a family of integral membrane glucose transporter (GLUT) molecules. To date 14 members of this family, also called the solute carrier 2A prot... Glucose and other carbohydrates are transported into cells using members of a family of integral membrane glucose transporter (GLUT) molecules. To date 14 members of this family, also called the solute carrier 2A proteins have been identified which are divided on the basis of transport characteristics and sequence similarities into several families (Classes 1 to 3). The expression of these different receptor subtypes varies between different species, tissues and cellular subtypes and each has differential sensitivities to stimuli such as insulin. The liver is a contributor to metabolic carbohydrate homeostasis and is a major site for synthesis, storage and redistribution of carbohydrates. Situations in which the balance of glucose homeostasis is upset such as diabetes or the metabolic syndrome can lead metabolic disturbances that drive chronic organ damage and failure, confirming the importance of understanding the molecular regulation of hepatic glucose homeostasis. There is a considerable literature describing the expression and function of receptors that regulate glucose uptake and release by hepatocytes, the most import cells in glucose regulation and glycogen storage. However there is less appreciation of the roles of GLUTs expressed by non parenchymal cell types within the liver, all of which require carbohydrate to function. A better understanding of the detailed cellular distribution of GLUTs in human liver tissue may shed light on mechanisms underlying disease pathogenesis. This review summarises the available literature on hepatocellular expression of GLUTs in health and disease and highlights areas where further investigation is required. 展开更多
关键词 Hepatic Liver Glucose transporters Glucose Transport Hepatocyte
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新型垂直筛板在综合塔回清段的应用
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作者 唐万全 《氮肥技术》 1995年第3期52-54,共3页
我厂现为3.5万tNH<sub>3</sub>/a生产能力。合成系统有φ800系列壹套,4M8压缩机4台和4M16压缩机2台,买际已达年产四万吨氨能力。碳化系统为2台φ2600碳化主塔。
关键词 综合塔 新型垂直 垂直筛板塔 回收清洗段 碳化水平衡 压缩机 流程简图 设计参数 稀氨 工艺
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