西藏拉鲁湿地土壤酵母菌多样性及产胞外 酶活性菌株分布特性研究     

郝兆  梁泽鹏  熊宁  拉巴  德吉  郭小芳 《广东农业科学》2017,44(4):99-107

采用平板稀释法从西藏拉鲁湿地土壤中分离酵母菌,开展城市湿地酵母菌多样性研究。结合经典分类法及26S rDNA D1/D2区域序列分析,对获得的酵母菌菌株进行系统分类,并进行产胞外酶活性菌株的皿内初筛。结果显示,分离得到的83株酵母菌分属于隐球菌属Cryptococcus、假丝酵母属Candida、原囊菌属Protomyces、红酵母属Rhodotorula及孢囊线黑粉酵母Cystofilobasidium等5个属16个种,其中胶红酵母Rhodotorula mucilaginosa相对丰度最高,约26%,其次为维多利亚隐球酵母Cryptococcus victoriae和山杨隐球酵母Cryptococcus aspenensis;多样性分析表明,LhWS6样点的酵母菌多样性最丰富,LhWS9样点则最低;产胞外酶活性菌株初筛结果表明,25℃下产脂肪酶活性菌株比例最高,为67%,而4℃下产淀粉酶活性菌株数最多,为49株。另外,低温条件下产淀粉酶、果胶酶、纤维素酶和几丁质酶的活性菌株比例均高于常温条件。结果表明拉鲁湿地土壤酵母菌总体种类较丰富,但每个样点的种类相对单一,说明湿地生境或人为活动一定程度影响到该生态环境酵母菌的种群分布,开发青藏高原耐低温、产胞外酶等活性菌株具有一定的应用前景。  相似文献   

Pharmacokinetics of orally administered DL-α-lipoic acid in dogs     

Zicker SC  Avila A  Joshi DK  Gross KL 《American journal of veterinary research》2010,71(11):1377-1383

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Are the Traditional Medical Uses of Muricidae Molluscs Substantiated by Their Pharmacological Properties and Bioactive Compounds?     

Kirsten Benkendorff  David Rudd  Bijayalakshmi Devi Nongmaithem  Lei Liu  Fiona Young  Vicki Edwards  Cathy Avila  Catherine A. Abbott 《Marine drugs》2015,13(8):5237-5275

Marine molluscs from the family Muricidae hold great potential for development as a source of therapeutically useful compounds. Traditionally known for the production of the ancient dye Tyrian purple, these molluscs also form the basis of some rare traditional medicines that have been used for thousands of years. Whilst these traditional and alternative medicines have not been chemically analysed or tested for efficacy in controlled clinical trials, a significant amount of independent research has documented the biological activity of extracts and compounds from these snails. In particular, Muricidae produce a suite of brominated indoles with anti-inflammatory, anti-cancer and steroidogenic activity, as well as choline esters with muscle-relaxing and pain relieving properties. These compounds could explain some of the traditional uses in wound healing, stomach pain and menstrual problems. However, the principle source of bioactive compounds is from the hypobranchial gland, whilst the shell and operculum are the main source used in most traditional remedies. Thus further research is required to understand this discrepancy and to optimise a quality controlled natural medicine from Muricidae.  相似文献   

Absorption,translocation and metabolism of bispyribac‐sodium on rice seedlings under cold stress          下载免费PDF全文

Luiz Fernando D Martini  Nilda R Burgos  José Alberto Noldin  Luis Antonio de Avila  Reiofeli A Salas 《Pest management science》2015,71(7):1021-1029

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乡土植物在青海省高等级公路绿化中的应用     

杨占武  喇臣梅  陈武生 《青海农林科技》2010,(4):64-67

乡土植物是在长期的系统演化过程中,经过严格自然选择的优胜者,它们与当地的气候、土壤相适应,具有适应性广、抗病虫害能力高、抗逆性强等特点。本文通过总结近年来乡土植物在青海公路绿化中的实践经验,就如何合理规划应用乡土植物进行了阐述。  相似文献   

液相色谱质谱联用分离、鉴定芥蓝中脱硫芥子油苷   总被引：6，自引：0，他引：6  

腊贵晓  方萍  李亚娟  王月 《浙江大学学报(农业与生命科学版)》2008,34(5):557-563

    从芥蓝菜薹中提取芥子油苷,经阴离子交换柱DEAE-Sephadex A-25纯化和硫酸酯酶脱硫,得到脱硫芥子油苷提取液.比较了两种高效液相色谱的流动相体系(甲醇与水体系和乙腈与水体系)及两种长度(250 mm×4.6 mm和150 mm×4.6 mm)的C18色谱柱(Prontosil ODS2,粒径5μm)对芥蓝脱硫芥子油苷的分离效果,确定分离条件为乙腈与水流动相体系和250 mm×4.6 mm C18柱.采用质谱联用及紫外扫描,在芥蓝菜薹中检测出7种脂肪族芥子油苷和4种吲哚族芥子油苷,其中4-甲硫基丁基芥子油苷为第一次在芥蓝中检测到.芥蓝中主要以脂肪族芥子油苷为主,占总芥子油苷含量的91.6%,而吲哚组芥子油苷的含量仅占8.4%.其中,3-丁烯基芥子油苷和4-甲基亚硫酰丁基芥子油苷为主要芥子油苷组分,分别占总含量的47.9%和35.5%,而含量最低的为4-羟基-3-吲哚甲基芥子油苷,只占总芥子油苷含量的0.2%.  相似文献   

Interaction between quinclorac and imidazolinones in the control of resistant Cyperus iria to ALS inhibitors     

Avila Neto  Roberto Costa  de Souza  Pablo Mazzuco  Rubert  Jaine  Seibt  Tiago André  Thomasi  Rosana Marzari  Melo  Adriano Arrué  Alves  Marcelo Plada  da Rosa Ulguim  André 《Journal of Crop Science and Biotechnology》2023,26(2):161-166

Journal of Crop Science and Biotechnology - Herbicides belonging to the chemical group imidazolinones and the quinclorac herbicide are important to control weeds in flooded rice. The objective of...  相似文献   

西藏不同青稞品种的品质差异分析   总被引：2，自引：0，他引：2  

张唐伟  余耀斌  拉琼 《大麦与谷类科学》2017,34(1)

为了解西藏地区不同青稞品种的品质差异,采集了西藏青稞主产区的不同青稞品种,并对青稞中的水分、淀粉、粗蛋白、粗纤维、矿质元素以及有效成分总黄酮、花青素、β-葡聚糖等14项指标进行了检测。结果表明:有色青稞中淀粉和微量元素Mn、Cu、Zn的含量在年度间存在着显著的差异,且有色青稞微量元素含量普遍偏低;青稞总黄酮含量范围在0.14%~0.42%,均值为0.23%;β-葡聚糖含量范围为2.65%~6.52%,均值为4.59%;有色青稞花青素含量变化较大,范围在0.022 7~0.649 7 mg/g,均值为0.133 2 mg/g。总黄酮含量、β-葡聚糖含量年际间差异不大,花青素含量年际间差异巨大。总黄酮含量有色青稞显著高于普通青稞,而β-葡聚糖含量二者无显著差异。  相似文献   

Effect of pressure on induction of mutation by nitrogen mustard     

McELROY WD  DE LA HABA G 《Science (New York, N.Y.)》1949,110(2867):640-642

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Some Current Misconceptions of N. L. Sadi Carnot's Memoir and Cycle     

LA Mer VK 《Science (New York, N.Y.)》1949,109(2841):598

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