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.

桑叶提取物组分的GC-MS分析

以桑叶为原料,95%乙醇为溶剂,制备桑叶提取物。采用气相色谱-质谱(GC-MS)法分析了桑叶提取物的挥发性组分。研究结果表明桑叶提取物的挥发性组分,主要由酸类(52.52%)、醚类(15.98%)、烷烃类(14.10%)、酯类(9.95%)、酮类(4.03%)、醛类(2.72%)、醇类(0.69%)等化合物组成。桑叶提取物中GC含量最高的化合物为n-十六酸(52.52%),其次是八甘醇单十二烷基醚(15.98%)。

青杞的化学成分研究

研究青杞地上部分（Solanum septemlobum Bunge）的化学成分。利用硅胶色谱柱层析进行分离纯化，通过波谱数据结合理化性质，鉴定为东莨菪内酯（scopoletin，1），N-反式阿魏酸酪酰胺（N-trans-feruloyl tyramine，2），14-methoxy-10，13-dimethyl-17-（5-oxo-2，5-dihydrofuran-3-y1）hexadecahydro-1H-cyclopenta[a]phenanthren-3-yl acetate（3），9，11-环氧麦角甾醇（9α，11α-epidioxyergosta-6，22-dien-3β-ol，4），豆甾醇-3-O-β-D-（6-软酯酰）葡萄糖苷（β-stigmasteryl-3-O-β-D-（6-palmityl）glucopyranoside，5），二十二烷基-反式-阿魏酸酯（（E）-docosyl 3-（4-hydroxy-3-methoxyphenyl）acrylate，6），豆甾醇（stigmastero，7），棕榈酸（hexadecanoicacid，8），正三十烷（triacontane，9），p胡萝卜苷（daucosmml，10），β-谷甾醇（β-sitosterol，11）。化合物1～11均为首次从本植物中得到，其中化合物1、2为首次在本属植物中分离得到。

喜光花叶挥发油的化学成分研究

利用气相色谱-质谱联用技术对喜光花叶挥发油成分进行了分析,结果分得19个化合物,占挥发油总量的95.35%。含量最高的是n-棕榈酸(37.61%),其次为3,8-二甲基-十二烷(7.28%)、四十四烷(5.07%)、溴二十二烷(4.55%)和1,54-二溴五十四烷(4.30%)。

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。

从植物中寻找农药活性物质──乌桕化学成分的研究（Ⅱ）

从乌桕［ＳａｐｉｕｍＳｅｂｉｆｅｒｕｍ（Ｌ．）Ｒｏｘｂ．］叶中分离得到４个化合物，经波谱鉴定为Ｎ－苯基－１－萘胺，正三十二烷醇，９，１２，１５－十八碳三烯－１－醇和十六烷酸乙酯．从乌柏茎皮中分离得到３个化合物，经波谱鉴定为β－谷甾醇，十六烷酸乙酯和３，４，３′（或３，４，４′）－Ｏ－三甲基鞣花酸．其中９，１２，１５－十八碳三烯－１－醇，十六烷酸乙酯首次在此植物中发现；３，４，３′（或３，４，４′）－Ｏ－三甲基鞣花酸是一个未见文献报道的新化合物．

SPME-GC-MS法研究竹叶柴胡和北柴胡挥发性成分差异

目的:对竹叶柴胡和北柴胡进行挥发性成分的比较和分析,指出竹叶柴胡和北柴胡的差异性和共同性。方法:利用固相微萃取技术(SPME)提取,采用气质联用(GC-MS)进行分离和鉴定。结果:共鉴定出竹叶柴胡48个成分,北柴胡21个成分,其中有10个化合物为共有峰,相对质量分数最高的均为n-十六烷酸。结论:SPME-GC-MS能全面快速分析柴胡挥发油成分,并作为柴胡药材质量评估和基源鉴定的科学手段。