舒适护理在左旋多巴联合精氨酸单日序贯法生长激素激发试验中的应用

选取2013年6月~2014年8月平均身高位于同龄儿第三百分位数以下患儿400例，随机分为观察组和对照组，每组200例。对照组采用常规护理，试验组采用常规护理的基础上加以舒适护理。比较两组患儿在采血中的疼痛程度及患儿及家长对护理服务的满意度。结果观察组与对照组比较，观察组在采血过程中患儿疼痛程度降低、提高了患儿及家长对护理服务的满意度。

限制Y精子活力对犊牛性别的影响

采用Ａ、Ｂ、Ｃ３种方法限制Ｙ精子活力，探讨其对犊牛性别的影响。Ａ方法向２３０头母牛子宫颈内注入５％Ｌ型精氨酸；Ｂ方法对１６０头母牛分为排卵前８～１０ｈ输精和接近排卵输精；Ｃ方法将前２种方法合并处理。３种方法产母率分别为６３８％、６５７％和６６７％，分别比对照组的４８８％提高１５０％、１３９９％、１７９％，差异均为极显著（Ｐ＜００１）。

我国氟化铝生产技术现状及发展趋势

介绍了氟化铝市场、生产状况的现状和氟化铝生产技术的发展状况,详细分析了目前各种生产工艺的优缺点,指出"精酸法"及其配套废水综合利用的干法工艺是氟化铝生产工艺的发展趋势。

Activity and Stability of Arginine Deiminase for Producing L-citrulline

A novel Enterococcus faecalis strain designated N J402 was found with high activity of arginine deiminase （ADI）. The optimum condition for catalytic activity was determined in terms of temperature （about 40℃）, thermostability （available 37℃） and pH （6-7）. The effects of substrate and product concentration were studied. The effects of various metal ions added in reaction mixtures on the biocatalyst were investigated and ADI of N J402 was found to exhibit Co^2＋ dependence, different from previous reports. Surfactant, cetyl trimethyl ammonium bromide, was one of the most important keys for producing L-citrulline. The enzyme in resting cells possessed the quality of high stability for reuse.

Optimization and control of a reactive distillation process for the synthesis of dimethyl carbonate

Dimethyl carbonate is an environmentally benign and biodegradable chemical.Based on integration of reactive distillation and pressure-swing distillation technologies,a novel process for synthesis of dimethyl carbonate through transesterification with propylene carbonate and methanol has been developed by Huang et al.In this work,the optimization of this process was performed by minimizing the total TAC.The results show that the optimal design flowsheet can save energy consumption by 18.6% with the propylene carbonate conversion of 99.9%.Then,an effective plant-wide control structure for the process was developed.Dynamic simulation results demonstrate that the temperature/flow rate cascade control plus with simple temperature control can keep not only product purity but also the conversion of the reactant at their desired values in the face of the disturbance in reactant feed flow rate and feed composition.

Soft sensor of chemical processes with large numbers of input parameters using auto-associative hierarchical neural network

To explore the problems of monitoring chemical processes with large numbers of input parameters, a method based on Auto-associative Hierarchical Neural Network(AHNN) is proposed. AHNN focuses on dealing with datasets in high-dimension. AHNNs consist of two parts: groups of subnets based on well trained Autoassociative Neural Networks(AANNs) and a main net. The subnets play an important role on the performance of AHNN. A simple but effective method of designing the subnets is developed in this paper. In this method,the subnets are designed according to the classification of the data attributes. For getting the classification, an effective method called Extension Data Attributes Classification(EDAC) is adopted. Soft sensor using AHNN based on EDAC(EDAC-AHNN) is introduced. As a case study, the production data of Purified Terephthalic Acid(PTA) solvent system are selected to examine the proposed model. The results of the EDAC-AHNN model are compared with the experimental data extracted from the literature, which shows the efficiency of the proposed model.

Production of glycerol carbonate via reactive distillation and extractive distillation: An experimental study

A process for the production of glycerol carbonate(GC) is proposed with the transesterification of glycerol(GL)and dimethyl carbonate(DMC) with CaO as catalyst by reactive distillation and extractive distillation. The performance of solvents in separating DMC-methanol azeotrope and the effects of operation parameters on the reactive distillation process are investigated experimentally. The results indicate that both the GL conversion and GC yield increase with the DMC/GL molar ratio, reflux ratio, final temperature of tower bottom, and CaO/GL molar ratio and decrease as the recycle number of CaO increases. The calcium concentration in the residual reaction mixture also decreases remarkably as the DMC/GL molar ratio increases. At DMC/GL molar ratio 4.0, reflux ratio 1.0, final temperature of tower bottom 358 K, and CaO/GL molar ratio 0.05, both the GL conversion and GC yield can reach above 99.0%, and the mass concentration of calcium in the product is less than 0.08%.

Effects of Acupuncture at Acupoint Neiguan(PC6)and Intravenous Injection of Larginine on the Improvement of Acute Myocardial Ischemia

Objective： The present study is to observe and compare the different effects of electroacupuncture（EA） at acupoint Neiguan （PC 6）, intravenous administration of L-arginine（L-Arg, a precursor of nitric oxide）, and the drug administration combined with the EA on acute myocardial ischemia（AMI） in rats. Methods. The rat model of AMI was established by occlusion of the anterior descending branch of the left coronary artery, then the animals were divided randomly into 5 groups, i.e. control group, AMI group, L-Arg treatment group, EA treatment group and L-Arg plus EA treatment group, the mean arterial pressure（MAP）, heart rate（HR） and the cardiac functions were observed and recorded. Results： The data showed that MAP, HR and all the indices of cardiac functions in the AMI group were significantly lower than those in control group, and the indices in each treatment group were all improved to different extents, especially in L-Arg plus EA treatment group. Conclusion.The combined use of L-Arg and EA had the better therapeutic effect on the AMI.