碱蓝6B共振光散射法检测DNA

研究了碱蓝 6B与脱氧核糖核酸在酸性条件下共振光散射特征 ,考察了影响因素和最佳反应条件 ,建立了一种测定纳克级DNA的方法。在四硼酸钠 盐酸 (pH =2 90 )缓冲溶液中 ,线性范围为 10～ 10 0 4 μg·L- 1 ,相关系数为 0 9913,检出限为 4 2 μg·L- 1 ,用于合成样品的测定结果令人满意。

含1,3,4-噁二唑片段的蓝刺头碱衍生物的设计、合成及抗烟草花叶病毒活性

[目的]为了发现具有抗烟草花叶病毒(TMV)活性的新化合物。[方法]通过取代、肼解、环化、取代4步反应将噁二唑片段引入到蓝刺头碱结构中,合成11个含1,3,4-噁二唑片段的蓝刺头碱衍生物,并对其进行了抗TMV活性测试。[结果]目标化合物结构经^(1)H NMR、^(13)C NMR和HRMS分析确证。抗TMV活性测试结果显示在质量浓度为500 mg/L时,8个蓝刺头碱噁二唑衍生物的抗TMV活性高于病毒唑,其中化合物5d和5j的活性最高。[结论]化合物5d和5j可作为抗TMV先导化合物进行进一步结构优化。

含酰腙吲哚片段的蓝刺头碱衍生物的设计、合成及抗烟草花叶病毒活性

为了发现高活性的抗病毒化合物,以蓝刺头碱为先导,运用骨架跃迁策略,设计合成了15个含有酰腙吲哚片段的蓝刺头碱衍生物,并通过^(1)H NMR、^(13)C NMR和HRMS确证了其结构,研究了其对烟草花叶病毒(TMV)的钝化、治疗和保护活性。结果表明,部分化合物具有较高的抗TMV活性。其中,化合物4n(43.5%,40.1%,38.7%)抗TMV的钝化、治疗和保护活性高于病毒唑和先导化合物L2。化合物4d(40.8%)、4f(42.0%)对TMV的钝化活性优于病毒唑(38.6%)和先导化合物L2(40.5%)。化合物4I(38.4%)对TMV的钝化活性与病毒唑(38.6%)相当。化合物4f对TMV的保护活性(36.4%)与病毒唑(37.2%)相当。化合物4n有望成为一种潜在的抗病毒农药。

褪色光度法测定SO_3^(2-)的研究

本文研究了ＳＯ２－３褪色碱蓝６Ｂ的反应，在ｐＨ５．２ＨＡｃ－ＮａＡｃ缓冲介质中，ＳＯ２－３浓度在０．３９～１２ｍｇ／Ｌ范围内符合比尔定律，仅Ｆｅ３＋、Ｎｉ２＋、Ｃｒ３＋干扰测定，用于食品中ＳＯ２－３的测定，结果令人满意。

微波消解—催化光度法测定茶叶中的硒

在硫酸介质中，硒（Ⅳ）能催化溴酸钾氧化碱蓝6B使之褪色。研究了这一催化反应的动力学条件，并对茶叶样品进行微波消解处理，建立了一种动力学光度法测定痕量Se（Ⅳ）的新方法。Se（Ⅳ）的含量在4×10^-5-4．8×10^-4μg·mL^-1。范围内与吸光度A呈良好的线性关系，相关系数R为0．9994，样品的回收率为98．9％。该方法测定茶叶中微量硒，所用仪器简单，简便快捷，选择性好，灵敏度高。

Abiotechnology of Indigofera tinctoria L. on the Saline Land of Aral Sea Basin and Producing of the Natural Plant Indigo Pigment for the Industry

The possibility of cultivation of lndigofera tinctoria L. plants in ecologically degraded and saline lands of the Aral Sea Basin was studied. A new salt-resistant Indigofera plant variety ＂Feruz-l＂ was producing by the classic methods of genetics and modem biotechnology.Agro-technology of cultivation as main and secondary culture after wheat was developed and recommended to the farmers of the country.The biotechnology of natural plant pigment indigo extraction has been developed and was recommended for using in different fields of industry： textile, pharmacy-pharmacology, perfume-cosmetic, architectural-decorative and food industry. Quantitative and qualitative HPLC （high pressure liquid chromatography） method of determination of plant natural indigo has been also developed.

解读《神农本草经》(36)

漏芦原文：漏芦,味苦,寒。主皮肤热,恶疮,疽,痔,湿痹。下乳汁。久服轻身,益气,耳目聪明,不老,延年。一名野兰。译文：漏芦,味苦,性寒。主治发热,恶疮,疽,痔疮,湿邪所致的痹证。能下乳汁。长期服用则使身体轻巧,气力增加,耳聪目明,寿命增加而不易衰老。另一个名字叫野兰。解读：漏芦,又名狼头花、鬼油麻,为菊科植物祁州漏芦或禹州漏芦的根。每年春季采挖,除去残茎及须根,洗净泥土,晒干,多切成厚片入药。

Synthesis and Characterization of Naphthalenesulfonic Formaldehyde Condensates for Improving the Solubility of C.I. Reactive Blue 19 in Alkali Liquor

The solubility of C.I. reactive blue 19 in aqueous alkali is poor, so it isn't used to dye cellulosic fiber in cold pad-batch dyeing. In order to improve the solubility of this dyestuff in alkali liquor, the right dispersants will be needed. A series of condensates are synthesized by changing the synthesis conditions such as the ratio of naphthalenesulfonic (N) to formaldehyde (F), acidity, and their compositions are confirmed by MS spectrum. It is found that in acidity scope of 20%-24% and the ratio of N to F 1∶0.33, the synthesized condensates can efficiently improve the solubility of C.I. reactive blue 19 in alkali liquor. In addition, the influences of the condensates on the exhaust dyeing and the cold pad-batch dyeing are tested.

Studies on Quantitative Determination of Active Principles in Chinese Herbal Medicine by Second Derivative Differential Pulse Polarography

The second derivative differential pulse polarography was developed for the quantitative determination of active principles in medicinal herbs (baicalin in Scutellaria baicalensis Georgi, indigo in Baphicacanthus cusia (Nees) Bremek, paeonol in Paeonia suffruticosa Andr and piperine in Piper longum L ) The C O group in baicalin, indigo, paeonol and piperine could be reduced to CH OH in acidic solution at the dropping mercury electrode, and showed very good second derivative differential pulse polarographic peak at 1 550V, 1 300V, 1 630V and 0 860V (vs Ag/AgCl) respectively The linear relationship between concentration of baicalin, indigo, paeonol, piperine and peak height was obtained in the concentration range of 4 5×10 5 ～ 2 7×10 4 mol·L 1 , 3 8×10 5 ～ 4 2×10 4 mol·L 1 , 1 0～6 0×10 4 mol·L 1 and 7 0×10 5 ～2 5×10 4 mol·L 1 and the determination limits were 9 0×10 8 mol·L 1 , 8 4×10 9 mol·L 1 , 9 2×10 9 mol·L 1 and 8 7×10 9 mol·L 1 respectively This method is simple, rapid and sensitive, and the results are accurate

Application of nitrogen-fixing cyanobacteria in restoration of saline and alkaline soils of Songnen Plain in China

The salt-resistant nitrogen-fixing cyanobacteria 888 was experimentally applied to the reclamation of saline and alkali soil in Songnen Plain in China. The pH, electrical conductivity (EC) and sodium adsorption ratio (SAR) of different saline soils were studied and compared. Results show that different saline soils exhibit various physico-chemical properties. Saline-sodic soils in Songnen Plain are ameliorated by using nitrogen-fixing blue-green algae 888 in the experiment. It is indicated that cyanobacteria 888 can grow in saline and alkaline soils, and the conditions favorable for its growth are soil moisture of 50% and dry algae inoculation at 0.03 mg/cm2. The main actions of nitrogen-fixing cyanobacteria are keeping the adsorbability of rubber sheath for sodium, increasing the organic matter content of the soils and decreasing the pH and the degree of salinity in the soils. But the arid climate and soil depth are the main factors that limit the restoration of saline and alkaline soils.

魔法厨房de变色大法

你家的厨房也可以变神奇!只要有了以下秘方,任何朴实低调的饭菜都会有想象不到的变化:不仅会变色,而且还能让你胃口大开!还等什么呀,快点开始做这道奇幻的营养餐吧!你需要准备的食材有:米饭、粉丝、紫甘蓝(或紫薯)、调味料以及其他配菜。你必须聘请的技术指导:老妈。

Antiviral activities against influenza virus(FM1) of bioactive fractions and representative compounds extracted from Banlangen(Radix Isatidis)

OBJECTIVE: To study the antiviral activities of clemastanin B(CB), epigoitrin, phenylpropanoids portion(PEP) and the mixture of phenylpropanoids, alkaloids and organic acid fractions(PEP+ALK+OA)from Banlangen(Radix Isatidis).METHODS: The experiment consisted of four parts:therapeutic action, prophylaxsis action, inhibition of virus attachment, and direct virucidal action. Cytopathic effect(CPE) and 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium(MTT) were used to assess antiviral activity.RESULTS: CB, epigoitrin, PEP and PEP + ALK + OA fractions from Banlangen(Radix Isatidis) extract significantly increased the viability of MDCK cells pre-infected with the virus compared with the virus control group in all the dilutions(P < 0.01). Pretreated with either pure compounds or chemical frac-tions of Banlangen(Radix Isatidis) extract in all the dilutions significantly improved the viability of MDCK cells(P < 0.01). The inhibition of virus absorption to the host cells by CB, epigoitrin and PEP was in a dose dependent manner.CONCLUSION: CB, epigoitrin, PEP and PEP+ALK+OA exert their anti-influenza activity by inhibiting the virus multiplication, prophylaxsis and blocking the virus attachment. The primary mode of action of PEP and PEP + ALK + OA is the inhibition of virus replication. The inhibitory effects on virus attachment and multiplication are the main modes for epigoitrin.