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Search Results: 1 - 10 of 77852 matches for " 武改红 "
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基于3“s”和网络技术的森林病虫害监测与管理系统*
敢?,英?
世界林业研究 , 2004,
Abstract: 主要介绍了遥感、地理信息系统和全球定位系统技术在森林病虫害监测和管理中的优势,分析了目前存在的主要问题,提出了建立基于3"s"技术管理系统的迫切性和结构框架,还指出了万维网地理信息系统用于病虫害监测与管理的原理和必然趋势。
黑曲霉原生质体诱变选育β-葡萄糖苷酶高产菌株
王春丽?,,陈畅?,陈树林?
生物工程学报 , 2009,
Abstract: 本研究报道了以原生质体诱变技术选育高产β-葡萄糖苷酶的黑曲霉菌株,并研究了其发酵特性。以黑曲霉cgmcc3.316为出发菌株,通过紫外诱变得到突变株3-3m。然后以3-3m为供试菌株,研究了其原生质体制备与再生的条件。最后通过原生质体诱变,选育得到一株β-葡萄糖苷酶活力较高的突变株60b-3d。该菌株具有良好的遗传稳定性,酶活力平均达到23iu/ml,与出发菌株cgmcc3.316相比提高39%。此外,该菌株的木聚糖酶活力也有所增加。同时考察了黑曲霉60b-3d的发酵特性,并与3-3m和出发菌株进行比较,结果表明该菌株有较高的蛋白分泌能力。本研究为发酵生产β-葡萄糖苷酶提供了一株良好的供试菌株。
Research on Development Rules of Forest Hazard Caused by Masion Pine Caterpillars Based on GIS
基于GIS的马尾松毛虫灾害空间扩散规律分析

WU Hong-zhi,CHEN Gai-ying,
,

遥感学报 , 2004,
Abstract: Although the integrated technique of management for Mason pine caterpillar have developed a systemic research for about half a century, it is still unable to meet the demand of forestry sustainable development with social and economic development. The monitoring and management system of forest insects and diseases based on "3S" and internet technology have already been established in many countries. However it is still in very preliminary stage and far from being perfect in our country at present. In this paper, we utilize remote sensing of data Qianshan county, Anhui province and primarily discuss the correlation between the occurrence and development of pine caterpillar and terrain, roads with residential areas in virtue of spatial analysis functions of GIS such as overlay, proximity and spatial statistics analysis. Dynamic change information of pine caterpillar among different years is also compared. Finally this article educed various factors influencing pine caterpillar and master space-time spatial expansion rule of pine caterpillar. It is beneficial to early forecast and prevention of pine caterpillar. The result has validated some empirical knowledge, such as geographic distribution and developing process of pine caterpillar. It shows the feasibility of forecasting pine caterpillar quantitatively and orientationally by using GIS.
混合菌发酵法生产三氮唑核苷的工艺条件优化
,赵希景,徐庆阳,李爱涛,陈宁
化工学报 , 2007,
Abstract: 以枯草芽孢杆菌(Bacillussubstilis)TM903和谷氨酸棒杆菌(Corynebacteriumglutamicum)TL1105为供试菌株,进行混合菌发酵法生产三氮唑核苷的研究。通过对TL1105接种量、KH2PO4、Mn2+以及前体物1H-1,2,4-三氮唑-3-甲酰胺(简称TCA)添加量的研究初步确定三氮唑核苷的发酵工艺条件。采用MINITAB软件对葡萄糖、KH2PO4、Mn2+及TCA的添加方式进行析因实验设计,得出最佳发酵条件,即一次性投糖,KH2PO4、Mn2+及TCA则进行分批流加。在最佳发酵条件下进行三氮唑核苷混合菌发酵,经过发酵60h,发酵液中可积累4.69g?L-1的三氮唑核苷。
复合木质纤维素酶菌株筛选及其培养条件优化
于俊杰,赫荣琳,,张粲,陈树林,张同存
生物技术通报 , 2013,
Abstract: 通过富集培养、平板初筛、平板点接,从土壤中筛选得到一批产木质纤维素酶系较全的菌株,经摇瓶复筛验证确定26-6为出发菌株。该菌经PDA平板菌落形态观察、孢子扫描电镜观察以及ITS序列片段分析,初步鉴定该菌为草酸青霉组菌株,并命名为PenicilliumoxalicumEH26-6。随后对菌株的摇瓶发酵条件进行研究,最终确定了最佳产酶条件:玉米芯为碳源,玉米浆干粉为有机氮源,初始pH5.0,温度30℃,接种量10%。本研究为低成本生产复合纤维素酶系的生产提供一个备选菌株。
四种测定纤维素酶发酵过程生物量方法的比较
李晨,赫荣琳,,马立娟,路福平,陈树林
生物技术通报 , 2013,
Abstract: 分别采用测定菌丝体蛋白的方法、测定核酸的方法、酸洗干燥法和纤维素测定仪的方法测定以不溶性纤维素为底物发酵产纤维素酶过程中的生物量。通过对发酵液取样测定比较,结果发现,采用测定核酸的方法精密度最高,其RSD值为6.32%,该法同纤维素测定仪的方法均可用于精确测定以不溶性纤维素为底物发酵产纤维素酶过程中的生物量。酸洗干燥法的测定结果精密度较差一些,但由于操作简便,也可用于常规分析。而测定菌丝体蛋白的方法无论是在精密度上还是操作简便性上均不占优势,该方法可作为另外3种方法的补充。为以不溶性纤维素为底物发酵产纤维素酶过程中生物量的分析检测提供了选择方法的依据。
Protoplast mutagenesis for improving β-glucosidase production of Aspergillus niger
黑曲霉原生质体诱变选育β-葡萄糖苷酶高产菌株

Chunli Wang,Gaihong Wu,Chang Chen,Shulin Chen,
王春丽
,,陈畅,陈树林

生物工程学报 , 2009,
Abstract: 本研究报道了以原生质体诱变技术选育高产β-葡萄糖苷酶的黑曲霉菌株,并研究了其发酵特性。以黑曲霉CGMCC3.316为出发菌株,通过紫外诱变得到突变株3-3M。然后以3-3M为供试菌株,研究了其原生质体制备与再生的条件。最后通过原生质体诱变,选育得到一株β-葡萄糖苷酶活力较高的突变株60B-3D。该菌株具有良好的遗传稳定性,酶活力平均达到23IU/mL,与出发菌株CGMCC3.316相比提高39%。此外,该菌株的木聚糖酶活力也有所增加。同时考察了黑曲霉60B-3D的发酵特性,并与3-3M和出发菌株进行比较,结果表明该菌株有较高的蛋白分泌能力。本研究为发酵生产β-葡萄糖苷酶提供了一株良好的供试菌株。
2004-2014年郑州市猩红热流行特征分析
Epidemic characteristics of scarlet fever in Zhengzhou: 2004-2014

陈巧格,,李国伟,李肖,宋彩娟,王万民,韩同
- , 2016,
Abstract: 目的 分析2004-2014年郑州市猩红热流行特征,为制定防控策略和开展防治工作提供科学依据。方法 用描述流行病学方法对2004-2014年郑州市猩红热疫情资料进行分析。结果 2004-2014年郑州市猩红热年均报告发病率为4.30/10万;男女性别比为1.75∶1;5-6月和11-12月报告发病数分别占全年报告发病数的34.15%、34.97%;发病年龄以0~10岁年龄组为主,占98.30%;学生、幼托儿童、散居儿童报告发病数分别占全部报告发病数的36.95%、39.36%、22.76%。结论 学校和托幼机构是猩红热高发场所,应加强学校和托幼机构疫情监测工作,防止暴发流行。??
基于SPA-MLR方法的土壤含水量光谱预测模型研究
Study on the spectral prediction model of soil moisture content based on SPA-MLR method

贾学勤,冯美臣,杨武德,王超,孙慧,,张松
- , 2018, DOI: 10.7606/j.issn.1000-7601.2018.03.39
Abstract: 以人工调配的不同含水量土壤的高光谱数据为基础,运用11种常规的变换方法对原始光谱反射率进行变换,使用连续投影算法(SPA)提取特征波段,然后建立多元线性回归(MLR)模型,并对不同模型进行评价比较,旨在选择监测土壤含水量的最佳高光谱模型,实现土壤含水量高光谱监测。结果表明,随着土壤含水量的增加光谱反射率先升高后降低;使用SPA提取的特征波段为3~5个,且不同变换处理后提取的特征波段存在差异。利用特征波段建立MLR回归模型,表明原始光谱经一定数学变换处理可以提高土壤含水量高光谱监测精度,其中对数的一阶微分变换处理(T8)后建立的SPA-MLR模型监测精度最高,其校正模型表现为R2=0.957,RMSE=2.16,RPD=4.74,验证模型表现为R2=0.903,RMSE=3.41,RPD=2.95。故基于反射率对数一阶微分变换处理所建立的SPA-MLR模型可以更好地实现土壤含水量的高光谱监测。
Based on hyperspectral data of artificially deployed soil with different moisture content, 11 conventional transformation methods were used to transform the original spectral reflectance, successive projection algorithm (SPA) was used to extract the sensitive wavelengths, and then the multiple linear regression (MLR) model was established. different models were evaluated and compared in order to select the best hyperspectral model for monitoring soil moisture and achieve hyperspectral monitoring of soil moisture content. The results showed that the spectral reflectance increased first and then decreased with the increase of soil moisture content; and the characteristic bands of SPA extraction ranged from 3 to 5, and there were differences in the characteristic bands extracted by different spectral transformations. The establishment of the MLR regression model using the characteristic wavebands shows that the original spectrum can improve the hyperspectral monitoring accuracy of soil moisture after a certain mathematical transformation. the SPA[CD*2]MLR model based on spectral reflectivity of the first-order differential logarithmic transform (T8) were the best, the calibration model showed that R2=0.957,RMSE=2.16,RPD=4.74 and validation model showed that R2=0.903,RMSE=3.41,RPD=2.95. Therefore, the SPA-MLR model based on the logarithmic first differential transformation of reflectance can realize the hyperspectral monitor of soil moisture content, and the study would provide technical support for rapid monitoring of the soil moisture content.
高效协同酶解中性汽爆玉米秸秆的工艺优化
钟健,杨敬,钞亚鹏,,贾文娣,张国青,石家骥,孙艳,钱世钧
化工学报 , 2011,
Abstract: 玉米秸秆是我国主要的农业废弃物之一,在木质纤维素乙醇领域具有广阔的应用前景。而玉米秸秆预处理和酶法糖化成本过高是目前工艺中的重点和难点之一。从4种纤维素降解酶制剂中优选出对中性汽爆玉米秸秆有最佳协同效果的木霉和黑曲霉纤维素酶制剂(6∶4体积比混合)。在此基础上,评估了木聚糖酶、β-葡萄糖苷酶、β-葡聚糖酶、漆酶、锰过氧化物酶等酶制剂,聚乙二醇-4000、吐温-80、牛血清白蛋白等非酶因子对糖化效率的影响,得到了一组高效协同降解汽爆玉米秸秆的复合酶体系,并获得了适宜的糖化工艺。结果表明,以每克中性汽爆预处理的玉米秸秆为底物,加入10FPU木霉/曲霉混合酶液,并添加1000IU的木聚糖酶和0.05gPEG4000,于50℃/150r·min-1服务把本文推荐给朋友加入引用管理器E-mailAlertRSS作者相关文章
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