中药更年安浸取液汽液固三相流自然循环蒸发浓缩

引　言中药生产关键环节 (提取、分离、浓缩、纯化等 )的新技术示范工程研究是中药现代化的主要内容之一 ,国家许多部委也都将其列为“十五”中药现代化专项中的重要内容 ,这为化学工程领域的科研人员提供了用武之地[1] .浓缩是中药制剂原料成型前处理的重要单元操作 ,沸腾蒸发     

Analysis of genetic relationship of Sarothamnus scoparius microsymbionts and Bradyrhizobium sp. by hybridization in microdilution wells

DNA-DNA hybridization in microdilution wells was successfully used to determine the overall genomic similarity among Sarothamnus scoparius microsymbionts isolated from Poland and Japan and representatives of Bradyrhizobium species including Bradyrhizobium sp. (Lupinus) USDA3045. Geographically different S. scoparius rhizobia diverged into two genomospecies at the DNA-DNA similarity level of approximately 49%. Polish isolates exhibited high DNA similarity levels to the DNA of Bradyrhizobium japonicum strains (approximately 78%) and formed a common genomospecies. Japanese S. scoparius rhizobia were allocated into a new genomic species due to the low similarity levels of their DNA to the DNA of representative strains of the Bradyrhizobium genus (from 19% to 52%).     

Cycloaddition Reactions of Fullerenes

In the review examples of [1 + 2], [2 + 2], [3 + 2] and [4 + 2] cycloaddition reactions of fullerenes are described.     

Inactivation of the enveloped bacteriophage phi6 by butylated hydroxytoluene and butylated hydroxyanisole

The activity of adenosine desaminase AMP-desaminase and glutaminase was studied in blood serum and the liver tissue at the normal state and with acute, subacute experimental affection of the liver as well as with the CCl4-induced liver cirrhosis and obturation jaundice in different periods. It is shown that the degree and trend of changes in the enzyme activity in the affected liver depend on the character and duration of the affecting agents action. The acute and subacute affection of the liver and one-day obturation jaundice are accompanied by a decrease in the activity of all the studied enzymes in the liver tissue. With cirrhosis induced by a multiple administration of CCl4 for three months or with a month obturation jaundice the activity of glutaminase in the liver tissue lowers and that of adenosine desaminase and AMP-desaminase increased sharply. In blood serum the activity of adenosine desaminase and AMP-desaminase increases more considerably with acute affection and cirrhosis, especially with billar one.     

Linear Order Statistic Estimation for the Two-Parameter Weibull and Extreme-Value Distributions from Type II Progressively Censored Samples

Point estimation for the scale and location parameters of the extreme-value (Type I) distribution by linear functions of order statistics from Type II progressively censored samples is investigated. Four types of linear estimators are considered: the best linear unbiased (BLU), an approximation to the BLU, unweighted regression, and a linearized maximum likelihood. Linear transformations of the estimators are also considered for reducing mean square errors. Exact bias, variance, and mean square error comparisons of the estimators are made for several censoring patterns. Since the natural logarithms of Weibull variates have extreme-value distributions, the investigation is applicable to estimation for Weibull distributions.     

Involvement of disperse repetitive sequences in wheat/rye genome adjustment

The union of different genomes in the same nucleus frequently results in hybrid genotypes with improved genome plasticity related to both genome remodeling events and changes in gene expression. Most modern cereal crops are polyploid species. Triticale, synthesized by the cross between wheat and rye, constitutes an excellent model to study polyploidization functional implications. We intend to attain a deeper knowledge of dispersed repetitive sequence involvement in parental genome reshuffle in triticale and in wheat-rye addition lines that have the entire wheat genome plus each rye chromosome pair. Through Random Amplified Polymorphic DNA (RAPD) analysis with OPH20 10-mer primer we unraveled clear alterations corresponding to the loss of specific bands from both parental genomes. Moreover, the sequential nature of those events was revealed by the increased absence of rye-origin bands in wheat-rye addition lines in comparison with triticale. Remodeled band sequencing revealed that both repetitive and coding genome domains are affected in wheat-rye hybrid genotypes. Additionally, the amplification and sequencing of pSc20H internal segments showed that the disappearance of parental bands may result from restricted sequence alterations and unraveled the involvement of wheat/rye related repetitive sequences in genome adjustment needed for hybrid plant stabilization.     

上海市无轨电车发展规划研究

从无轨电车的清洁、无污染等优良特性出发,结合上海市无轨电车在设施和技术上的成熟性,分别从成本、环境、能源、设施的充分利用等角度,对上海市无轨电车重新发展的可行性作出了分析。然后根据结论对上海市无轨电车的发展方向提出了规划方案和具体调整建议,最后从宏观上得出无轨电车发展的政策建议。     

我国地热采暖的三大问题

我国东部沿太平洋地区有丰富的低温地热资源,东部地区城市众多、人口密集,有稳定的采暖市场需求,但有3个主要问题需要解决。一是资源能实现可持续利用,地热能在不过量开采下是可再生的。二是要采用能抗腐蚀的地热采暖系统。三是所需要的资金能筹措经营能获利,才能与常规采暖竞争。     

An Efficient Reactor for High-Lead Slag Reduction Process: Oxygen-Rich Side Blow Furnace

This work reports an efficient reactor, i.e., oxygen-rich side blow furnace (OSBF), for high-lead slag reduction. An OSBF with a cross-sectional area of 8.4 m² was applied in an industrial-scale test and the results were compared with those from a traditional high-lead slag reduction reactor, i.e., blast furnace (BF), with which an additional electric heating fore well (EHFW) was connected for slag cleaning. By using the OSBF, Pb and Cu recoveries were raised by 1.07% and 7.99% compared with those from the traditional BF+EHFW, respectively. The optimal slag type for recovering metal values in the OSBF was also analyzed. Within the range of Fe/SiO₂ = 1.56–1.87 and CaO/SiO₂ = 0.8–1.05, lower Pb and Cu contents of the slag can be achieved with Fe/SiO₂ = 1.65–1.75 and CaO/SiO₂ = 1.0.