Microcalorimetric investigation of effect of berberine alkaloids from Coptis chinensis Franch on intestinal diagnostic flora growth

The inhibitory effect of three berberine alkaloids (BAs) from Coptis chinensis Franch, a traditional Chinese medicinal (TCM) herb, on Bifidobacterium adolescentis growth was investigated by micro- calorimetry. The power-time curves of B. adolescentis with and without BAs were acquired, meanwhile the extent and duration of inhibitory effect on the metabolism were evaluated by the growth rate con- stant (k), half inhibitory ratio (IC50), maximum heat-output power (Pmax), peak time of maximum heat-output power...     

On the Behavior Characteristics of Cellular Automata

0IntroductionArStaifnitcaia lF lei fIens twiatsut epriens e1n9t8e7d,fsirinstcley t hbeyn Cit.hGas.a Lraonugsteodnt haetcomprehensiveinterest of researchers in computer communityand other science domains[1-5].Within artificial life circle,in-vestigative ob…     

山体坡度对山体周围高速公路路面风速及行车安全的影响

为深入研究山体坡度对山体周围环境风的影响,基于计算流体力学理论,选择Fluent仿真环境建立高度相同、坡度不同的二维余弦山体模型进行数值风洞试验.依据高速公路与山体的空间位置关系以及常见车型的风压中心高度,定量研究了山体坡度与山体周围高速公路路面环境风的关系.实验结果表明,山体顶端和山体下游区域是山体周围环境风的局部极大值点,并通过数据分析和曲线拟合得到了相应的拟合公式.实验结论揭示了途径山体的高速公路路面环境风受山体坡度变化的影响规律,为三维山体建模仿真参数的确定提供了依据,可为"风-车-路"系统的深入研究、待建高速公路的选线以及运营高速公路的风速预警系统提供理论和技术支持.     

限域于三维多孔碳的超细纳米尺度Cu2Sb合金用于钠离子和钾离子电池负极

Ultrafine nano-scale Cu₂Sb alloy confined in a three-dimensional porous carbon was synthesized using NaCl template-assisted vacuum freeze-drying followed by high-temperature sintering and was evaluated as an anode for sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs). The alloy exerts excellent cycling durability (the capacity can be maintained at 328.3 mA·h·g?1 after 100 cycles for SIBs and 260 mA·h·g?1 for PIBs) and rate capability (199 mA·h·g?1 at 5 A·g?1 for SIBs and 148 mA·h·g?1 at 5 A·g?1 for PIBs) because of the smooth electron transport path, fast Na/K ion diffusion rate, and restricted volume changes from the synergistic effect of three-dimensional porous carbon networks and the ultrafine bimetallic nanoalloy. This study provides an ingenious design route and a simple preparation method toward exploring a high-property electrode for K-ion and Na-ion batteries, and it also introduces broad application prospects for other electrochemical applications.     

吃饺子过年

过年一定要吃饺子.北方有一句俗语是"好活不如躺着,好吃不如饺子".饺子一直是北方人不可缺少的年夜饭.但是好吃却不好做.现在我们就把流行于北方的几样饺子的做法教给大家,希望南方的朋友在除夕也能吃上美味的饺子.     

控脂美白面膜的制备

通过对天然药物的了解,采用桑叶提取物作为原料制备控脂美白面膜。以单因素考察分析表明,较优面膜的配方为PVA、碳黑、二甲基硅油、维生素E、赛比克、卡波姆、桑叶提取物等。面膜耐热、耐寒及稳定性良好,且无刺激性,使用后皮肤清爽无油腻感,具有一定的控脂保湿效果。     

广东惠州市地表水水质变化与经济发展关系研究

本文通过惠州市近30年水质的变化,尤其是最近5年地表水水质变化情况的研究,找寻引起惠州市水质污染变化的根本原因和排污治污措施,同时将最近5年的水质变化情况与该市经济发展的GDP进行比较,对二者的关系做深入细致的探讨。研究表明:落后的经济对环境的毁坏性更大,这可能与人们的需求和认识有关,而经济的发展不一定对周围环境造成破坏,相反还有助于环境的改善和可持续发展。     

脑血管病的颈动脉多功能超声检测分析

本文通过对脑血管病患者颈动脉形态结构和血流动力学变化的分析,探讨不同脑血管病的颈动脉多功能彩色多普勒超声检测结果与临床症状的关系.