6-(N,N-Dimethylamino)-2-naphthoylacryl Acid:a Highly Selective and Sensitive Fluorescent Sensor of Copper(Ⅱ)

A novel fluorescent probe,6-（N,N-dimethylamino）-2-naphthoylacryl acid（ACADAN） was designed and synthesized as a fluorescent sensor for Cu^2＋ in aqueous media.Significant amplification of fluorescence signals without causing any discernible change of maximum fluorescence emission wavelength（λ max） was observed upon the addition of Cu^2＋.Importantly,ACADAN is capable of recognizing Cu^2＋ selectively in aqueous media in the presence of various biologically relevant metal ions and the prevalent toxic metal ions in the environment with high sensitivity（detection limit was 0.1 μmol/L）.

Polarographic behavior of 1,4,7-triazacycloanane-N,N',N"-tris (meth-ylphonic acid) (NOTP)-Bi(Ⅲ) complex

The polargraphic behavior of Bi(Ⅲ)-NOTP complex has been investigated inaqueous solution. It was found that under the conditions of pH 3.0 and of 0.02 mol/L NH_4Cl, theBi(Ⅲ)-NOTP system gives a sensitive second order derivative wave at -0.340 V(vs SCE), which isproved to be an adsorptive complex wave. The composition of the complex is Bi(Ⅲ):NOTP. Furthermore,the peak current is linear to the concentration of Bi(Ⅲ) in the range from 3.0x10^(-8) to5.0x10^(-6) mol/L. Artificial and practical samples have been detected with high sensitivity andreceptivity.

A Diet with 3% of Energy from a Mixture of Omega-3 Fatty Acids Significantly Increases in Vivo Lipid Peroxidation in Postmenopausal Women

Dietary omega-3 (n - 3) polyunsaturated fatty acids (PUFA) are recommended by public health organizations to reduce the risk of cardiovascular disease, and several epidemiological studies have suggested there is an inverse association between n - 3 intake and human cancers. However, n - 3 are susceptible to an increase in lipid peroxidation in the human body. As part of a crossover dietary intervention study of a diet (20% of energy from fat) with or without an additional 3% of energy from a mixture of n - 3 (with 5.36 g α-linolenic acid and 1.45 g eicosapentaenoic acid and docosahexaenoic acid per 2000 kcal per day), we measured total in vivo lipid peroxidation in healthy postmenopausal women (n = 15). Our results indicated that the diet with 3% of energy from n - 3 significantly increased the urinary concentrations of total polar lipophilic aldehydes and related compounds produced via lipid peroxidation (p α, β-unsaturated hydroxy aldehydes 4-hydroxy-2-trans - hexenal (p trans -decenal (p < 0.05) compared to the diet with less than 1% of energy from n - 3. This is also the first study to document the presence of 4-hydroxy-2-trans -decenal in the urine of individuals consuming n - 3. These results demonstrate that an increase in 3% of energy from dietary n – 3 increases in vivo lipid peroxidation.

Curing Behaviors and Thermal Properties of Dimer Fatty Acid （DFA） Modified Multifunctional Epoxy Resin

In order to improve the toughness of the cured aromatic tetrafunctional epoxy resins, a dlmer rarboxylic acid named dlmer fatty acid （DFA） was used to modify an aromatic tetrafunctional epoxy, N, N, N＇, N＇-tetraglycidyl-2,2-bis [ 4-（ 4-aminophcuoxy ） phenyl ] propane （TGBAPP）. The curing behaviors of DFA- TGBAPP/MNA （ methyl nadic anhydride） systems were studied by differential scanning calorimetry （DSC） method. And the thermal properties of the cured epoxy resin were investigated with the thermo-gravimetric analysis （TGA） and dynamic mechanical analysis （DMA）. Besides, the toughness was characterized with the impact strength tested by charpy impact testing. The results indicated that the modification would improve the curing reactions, and the curing temperatures were decreased with the increasing content of DFA. The thermal properties were not influenced obviously, and the toughness could be improved when the epoxy resin was modified with DFA.

山木通的化学成分研究

目的:对毛茛科铁线莲属植物山木通的化学成分进行提取、分离和鉴定。方法:用不同浓度乙醇提取,利用硅胶、Sephadex LH-20、ODS柱色谱法对山木通的化学成分进行分离,根据理化性质和MS、NMR光谱数据进行结构鉴定。结果:经鉴定得到7个化合物,分别为β-谷甾醇(I);正二十二烷(II);3-羰基齐墩果烷(III);正十六烷酸(IV);正二十六烷酸(V);丁香酸(VI);5-羟基4-氧代戊酸(VII)。结论:所得化合物均为首次从该种植物中得到。

赤芝子实体的化学成分研究

目的研究赤芝子实体的化学成分。方法应用多种色谱方法进行分离和纯化,通过1H,13C-NMR和MS等波谱技术确定化合物的结构。结果从赤芝子实体中分离得到8个化合物,分别被鉴定为:灵芝醇B(ganoderiol B,1)、灵芝酸A(ganoderic acid A,2)、赤芝酸A(lucidenic acid A,3)、灵芝萜酮二醇(ganodermanondiol,4)、3,7,11,15,23-5O-5α-羊毛甾-8-烯-26烷酸(3,7,11,15,23-pentaoxo-5α-lanosta-8-en-26-oic acid,5)、麦角甾-7,22-二烯-3β-醇十五烷酸酯(ergosta-7,22-dien-3β-ol-pentadecanoate,6)、麦角甾-7,22-二烯-3β-醇(ergosta-7,22-dien-3β-ol,7)及正二十六烷酸(n-hexacosanoic acid,8)。结论其中化合物8为从该植物中首次分离得到。