波尔山羊冷冻精液稀释液配方研究

实验采集三头波尔山羊种公羊精液,比较三种精液(A.葡萄糖-柠檬酸钠-卵黄;B.葡萄糖-柠檬酸钠-乙二胺四乙酸-卵黄;C.乳糖-卵黄)冷冻保存稀释液配方对颗粒冻精解冻效果,以及测定解冻后精子活力,结果表明:C稀释液解冻后精子的存活率平均为35.4%,优于A和B液呈现显著差异或极显著差异(P＜0.05,P＜0.01),而且C液的解冻后的存活时间为58.75h,高于A和B液,差异极显著(P＜0.01).结论:C的稀释液配方是最优的颗粒解冻配方.     

水泥配料计算机控制系统

介绍一种利用工业控制计算机实现水泥配料的自动控制系统。该系统由工控机、单片机控制器、震动机和传送系统等组成 ,完成对各种原料的比例配送、检测、管理与自动控制 ;采用模糊控制与神经网络相结合的控制算法 ,使系统与PID控制相比具有响应快、控制精度高的特点。     

气态环己烷催化氧化制丁二酸酐的研究一纳米催化剂活性组分对目标反应的影响

本文以气态环己烷催化氧化制丁二酸酐为目标反应，对TiO2-Al2O3纳米复合载体上的添加组分进行了研究与探索．结果表明，实验条件下，活性最好的催化剂添加物组成为：V2O5负载量为载体质量的5．0％，P与V原子个数比为1．5，催化剂中Mo、Sb、K的质量百分含量分别为1．25％、0．6％、4．0％．     

Content uniformity of pharmaceutical solid dosage forms by near infrared hyperspectral imaging: A feasibility study

Near-infrared imaging systems simultaneously record spectral and spatial information. Each measurement generates a data cube containing several thousand spectra. Chemometric methods are therefore required to extract qualitative and quantitative information. The aim of this study was to determine the feasibility of quantifying active pharmaceutical ingredient (API) and excipient content in pharmaceutical formulations using hyperspectral imaging.Two kinds of tablets with a range of API content were analysed: a binary mixture of API and cellulose, and a pharmaceutical formulation with seven different compounds. Two pixel sizes, 10 μm/pixel and 40 μm/pixel, were compared, together with two types of spectral pretreatment: standard normal variate (SNV) normalization and Savitzky-Golay smoothing. Two methods of extracting concentrations were compared: the partial least squares 2 (PLS2) algorithm, which predicts the content of several compounds simultaneously, and the multivariate classical least squares (CLS) algorithm based on pure compound reference spectra without calibration.Best content predictions were achieved using 40 μm/pixel resolution and the PLS2 method with SNV normalized spectra. However, the CLS method extracted distribution maps with higher contrast and was less sensitive to noisy spectra and outliers; its API predictions were also highly correlated to real content, indicating the feasibility of predicting API content using hyperspectral imaging without calibration.     

优化水泥搅拌桩的水泥掺入比试验研究

选取某公路工程现场淤泥软土进行室内配合比试验,通过对室内试验数据进行回归分析得出：水泥土无侧限抗压强度与水泥掺入比之间存在线性关系。利用此结论确定最佳的水泥掺入量,优化设计方案,使设计、施工更趋经济合理,为水泥土室内试验的工程设计提供参考。     

Therapeutic Deep Eutectic Systems towards the Treatment of Tuberculosis and Colorectal Cancer: Opportunities and Challenges

What if a new technology based on therapeutic deep eutectic systems would disrupt the current treatment of major economic and socially burden diseases? The classical definition of eutectic systems is that they are the combination of two or more compounds that interact via hydrogen bonds, from which results a melting temperature depression in comparison with that of its individual components. Therapeutic deep eutectic systems are defined as eutectic systems in which at least one of the individual components is an active pharmaceutical ingredient, or a eutectic system in which the active pharmaceutical ingredient is dissolved. Current literature reports on tuberculosis have been mostly based on the most common anti-tuberculosis drugs prescribed. Using eutectic systems based on naturally occurring molecules known for their anti-microbial activity may also present a promising therapeutic strategy able to cope with the prevalence of Mycobacterium tuberculosis and prevent the appearance of multidrug resistance strains. With regards to colorectal cancer, literature has been unravelling combinations of terpenes with anti-inflammatory drugs that are selectively cytotoxic towards colorectal cancer cells and do not compromise the viability of normal intestinal cells. This technology could contribute to preventing tumor growth and metastasis while providing a patient compliance therapeutics, which will be crucial to the success of overcoming the challenges presented by cancers.     

中药有效成分提取分离技术最新进展

综述了近年来最新中药有效成分提取分离方法的原理和应用进展,包括超临界流体萃取、酶法提取、半仿生提取、分子印迹技术等,并指出了中药提取分离的发展方向。     

密闭微波辅助萃取丹参中有效成分的研究

应用具有压力控制附件的MSP-100D密闭微波萃取装置,对丹参中的有效成分丹参酮、丹参酮A及隐丹参酮进行微波萃取研究.在乙醇体积分数为90%,微波辐射时间为4min,溶剂体积对样品质量比为20∶1和样品粒径为120目的条件下,有效成分提取率最佳.对比了密闭微波萃取同索氏萃取和超声萃取丹参有效成分的差异.     

一些铜合金浸焊性能的研究

浸渍合金是冷压浸渍、无压浸渍和PDC钻头制过中的重要材料.本研究表明,在真空浸渍牵件下,用组分比例很严格的Cu-Ni-Mn四元合金,可将浸焊温度降低到1050℃,并具有良好的浸焊性能.     

谢桥煤矿13118工作面2#陷落柱及影响区的煤岩特征

本文简单介绍了谢桥煤矿地质、水文地质条件;介绍了1^#、2^#陷落柱的概况;重点介绍了13118工作面下顺槽西段揭露的2。陷落柱及其影响带的煤岩层特征;说明了2^#陷落柱具有整体塌陷、柱体内部裂隙发育、裂隙较宽和联通性较好等、在煤层中柱体边界清晰、陷落柱影响带较宽等特征;初步分析了陷落柱发育的时间、原因。