Gama-aminobutyric acid accumulation in Elsholtzia splendens in response to copper toxicity

A solution with different Cu supply levels was cultured to investigate gama-aminobutyric acid (GABA) accumulation in Elsholtzia splendens, a native Chinese Cu-tolerant and accumulating plant species. Increasing Cu from 0.25 to 500 μmol/L significantly enhanced levels of GABA and histidine (His), but considerably decreased levels of aspartate (Asp) and glutamate (Glu) in the leaves. The leaf Asp level negatively correlated with leaf Cu level, while leaf GABA level positively correlated with leaf Cu level. The leaf Glu level negatively correlated with leaf GABA level in Elsholtzia splendens. The depletion of leaf Glu may be related to the enhanced synthesis of leaf GABA under Cu stress.     

双阳极室成对电解合成乙醛酸新方法工艺研究

以过饱和草酸溶液为阴极液,乙二醛溶液为阳极液,分别采用单、双阳极电解槽进行电解合成乙醛酸研究.结果表明,双阳极室的时空产率和电流效率较单阳极室高.在此基础上研究了恒电压、恒电流、电解时间以及乙二醛的浓度、盐酸的浓度等对合成乙醛酸的影响,通过正交分析得到了新的电解合成乙醛酸方法的最佳工艺条件.     

本钢7500L/h废盐酸再生机组工艺与设备浅析

主要对本钢7500IMh废盐酸再生机组的生产工艺进行了叙述，并在工艺基础上对其机组的主要设备的结构特点及用途进行了介绍。     

Ursolic acid inhibits proliferation and induces apoptosis of HT-29 colon cancer cells by inhibiting the EGFR/MAPK pathway

rectal cancer.     

高校玻璃艺术的实训教学研究

自2000年以来,北京、上海、广州等地的高校建立了玻璃工作室.国内繁荣的玻璃工业环境,为专业发展带来美好前景,更多的高校加快了开设玻璃艺术课程的步伐.本文结合广东高校玻璃工作室建设实践,对实训室必要的安全防护措施展开研究.为玻璃艺术课程的实训安全、科学进行提供参考思路.     

辛烯氢甲酰化反应基础研究

研究气、液、固三相体系中烯烃氢甲酰化反应固载催化剂的制备方法及影响因素。重点论述固载铑催化剂的制备,包括对不同催化剂载体的优选及不同催化剂制备条件的研究。用不同方法进行催化剂制备并考察其催化反应的性能,最终确定了合适的固载铑催化剂的制备方法。     

Correlation between Apgar score and urinary uric acid to creatinine ratio in perinatal asphyxia

A randomized case control hospital based study was conducted over 12 months time on 31 asphyxiated and 31 normal newborn to see whether urinary uric acid can be used as a marker of perinatal asphyxia and can be correlated with the clinical diagnosis by Apgar score. Uric acid and creatinine were estimated in spot urine within 24 hours after birth in both cases and controls. A ratio between concentrations of uric acid to creatinine was estimated and compared between cases and controls. It was found that the ratios were significantly higher in cases than controls (3.1± 1.3 vs 0.96± 0.54; P < 0.001) and among asphyxia patients, a significant negative linear correlation was found between the uric acid to creatinine ratio and the Apgar score (r = −0.857, P < 0.001). So urinary uric acid to creatinine ratio can be used as an additional non-invasive dispace, easy and at the same time early biochemical marker of birth asphyxia which biochemically supports the clinical diagnosis and severity grading of asphyxia by Apgar score.     

运动性酮体的研究现状

酮体作为糖尿病的一个重要指标,在医学领域已经有了不少的研究,而在竞技体育中,有关运动性酮体的研究也在不断的发展。通过酮体的代谢特点、影响酮体代谢的因素、酮体对运动员的影响以及酮体的检测技术4个方面对运动性酮体做简单的介绍,给运动员的训练提供一定的参考。     

γ辐射对α-亚麻酸氧化反应的影响

对α-亚麻酸及其乙酯分别在氧气气氛和氮气气氛下进行一定剂量的γ辐射,每隔2d测定其过氧化值.研究结果表明,辐射剂量和时间对亚麻酸的过氧化值有较大影响;同时探讨了亚麻酸在γ辐射下过氧化值与反应机制之间的内在联系。     

超临界CO2作非溶剂制备聚乳酸膜的研究

利用超临界CO2作非溶剂可以制备聚乳酸膜。通过扫描电镜研究了不同成膜条件下膜断面形态的变化,超临界CO2的作用促使膜结晶度提高,得到胞腔状开孔结构膜。