鸡胆汁的红外吸收光谱特性

鸡胆汁提取物具有良好的抗炎和抗肿瘤活性。将鸡胆汁与其它动物胆汁阴干，分别做红外吸收光谱；再将各种不同来源的鸡胆汁阴干，分别比较其红外吸收光谱。研究结果表明：鸡胆汁与其它动物胆汁的红外吸收光谱有着明显的不同，具有特征性；而各种不同来源的鸡胆汁的红外吸收光谱却有着很好的一致性。揭示鸡胆汁与其它动物胆汁相比化学组成各不相同；而各类鸡胆汁具有基本相同的化学组成。     

应用ICP-AES技术测定胆管胆色素结石粉及其难溶部分中的元素组分

用ICP-AES技术研究了胆石粉的处理过程,选择了合适的实验条件,并做了精密及回收率实验。为21例结石粉及其难溶部分进行了元素测定。计算了残留元素百分比,为医学研究提供了有用数据。     

112高速电影经纬仪靶场测量数据处理方法

本文针对112高速电影经纬仪系统的结构特点,测量信息的误差源,同步摄影机胶片记录形式,依据交会定位的测量体制,建立了适合靶场数据处理要求的数学模型。並据此完成了数据处理方法的程序设计,从而使该系统在靶场试验中开始发挥其应有的作用。     

用NMR研究和确定川藏香茶菜中一种新成分化学结构

本文报告了用NMR方法并结合其它结构信息,研究并首次确定了川藏香茶菜[Isodon pha-ricus(prian)murata]中一种新的贝壳杉烯型二萜,并命名为川藏香茶菜甲素(Isodopharicin A)。     

粮食中胱氨酸含量的测定

本文介绍的胱氨酸分析法,采用过甲酸氧化胱氨酸为标准,10分钟分析程序,分析快速准确。经对几类样品的测定,回收率(>97%)和变异系数(<4%)均符合要求。     

Analysis of the Aconitine Alkaloids in Chuanwu by Electrospray Ionization ／ Tandem Mass Spectrometry

An electrospray ionization / tandem mass spectrometric (ESUMS/MS) method was developed for the simultaneous identification and analysis of three aconitine alkaloids [mesacontine (MA), hypaconitine (HA), and aconitine (A)] as intact molecules at low nanogram level in Chinese traditional medicine Chuanwu decoction as well as in human whole blood extract without chromatographic separation.     

用NMR测定辐射剂量

本文介绍了利用琼酯糖-亚铁为剂量液,经辐照,产生糖的自由基、质子和三价铁离子。根据Fe~(3+)本身具有的弛豫能力-减小弛豫时间,利用NMR法测量出不同剂量下的T_1值并获得整个辐照过程弛豫速率随剂量分布的曲线。还观察到整个辐射过程体系氧化还原反应的动态变化过程。     

Determination of Sparfloxacin in Human Urine by Reversed-Phase High Performance Liquid Chromatography With Nitrous Acid and Hydroiodic Pre-Column Derivatization

Quinolone drugs, due to the aromatic systems with benzoheterocycle in their molecules, can usually emit strong fluorescence. However, contrary to this, sparfloxacin (SPFX) as the fourth generation quinolone products, can only emit weak fluorescence, although it possesses a similar structure to quinolones. At present, the majority of SPFX determinations have been carried out using techniques such as colorimetry1 and spectrophotometry2-3. For the high performance liquid chromatography (HP…     

Determination of Seven Major Ginsenosides in Different Parts of Panax quinquefolius L.(American Ginseng) with Different Ages

Ginsenosides Rg1,Re,Rb1,Rc,Rb2,Rb3,and Rd in different parts of the American ginseng plant were investigated.The extraction process was a pressurized microwave-assisted extraction(PMAE).The seven ginsenosides were separated and determined by high-performance liquid chromatography(HPLC) with a ultraviolet(UV) detector,at 203 nm.The experiment results showed significant variations in the individual ginsenoside contents of the American ginseng in different parts and ages of the plant.The results demonstrated that the leaves,root hairs,and rhizomes of Panax quinquefolius L.contained higher ginsenoside contents,followed by the main roots and stems.The leaves contained dramatically higher levels of ginsenoside Rg1,Rb3,and Rd than the other four parts.Higher contents of Rb1 and Re were present in the main roots,root hairs,and rhizomes.The amount of ginsenoside content in the stems was the lowest.The total content of the seven ginsenosides in main roots,root hairs and rhizomes increased with the age of the plant.In contrast,the ginsenoside contents in the leaves and stems decreased with a year of growth.