检索结果-南通市图书馆

Effect of Calcium Nitrate and Sodium Nitrite on the Rebar Corrosion of Medium Carbon Steel in Seawater and cassava Fluid

引用

Journal of Minerals and Materials Characterization and Engineering 2014年第3期2卷 223-229页

作者： Mohammed Adamu Lasisi Ejibunu Umoru Oladeji Oluremi Ige Department of Metallurgical Engineering Kogi State Polytechnic Lokoja Nigeria Department of Materials Science and Engineering Obafemi Awolowo University Ile-Ife Nigeria

Inhibitors are regularly used as one of the principal prevention and control techniques in reinforcement corrosion. Hence this study investigates the effect of calcium nitrate and sodium nitrite inhibitors on the rebar corrosion of medium carbon steel in seawater and cassava fluid with a view to determining inhibitive potentials of the different inhibitors in the two media. Gravimetric and voltametric techniques were employed in this study and a total of forty-five corrosion coupons of different dimensions were produced. Forty coupons were used for gravimetric analysis and the remaining five for corrosion potentials measurements. Eight of the samples were used as control;while other eight samples each were admixed with calcium nitrate and sodium nitrite in concrete cubes. It was later immersed in seawater and cassava fluid for a total duration of 32 days and the measurements were taken at the interval of 4 days in order to determine the corrosion rates in mils per year (mmpy). Two controls and admixed samples each were later immersed in seawater and cassava fluid, respectively, for durations of 32 days to determine the corrosion potentials using a voltmeter and a Copper-Copper Sulphate Electrode (Cu/CuSO4). The pH of each medium was measured throughout the period of exposure. The results obtained expressed that all the samples except the control samples, displayed some degree of inhibition. The inhibition levels for the admixed samples in seawater were higher compared with those in cassava fluid. Inhibition efficiencies for various inhibitors followed different trends in different environment. The inhibition efficiencies for calcium nitrate in cassava fluid and seawater were 26.81% and 64.85% respectively. The study concluded that inorganic inhibitors were effective in inhibiting corrosion in cyanide and chloride contaminated concrete cubes.

关键词： Inhibitor Rebar Corrosion Steel Seawater cassava Fluid

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Multiplex PCR for Identification and Detection of cassava Mosaic Begomoviruses in Togo

引用

Advances in Microbiology 2023年第11期13卷 517-525页

作者： Senya Sakina Allado Djodji Kossikouma Adjata Justin Simon Pita Assion Sétu Mivedor Kodjovi Atassé Dansou-Kodjo Koffi Tozo Laboratoire de Virologie et de Biotechnologies Vé g&eacutetales Ecole Sup&eacuterieure d’Agronomie (ESA) Universit&eacute de Lom&eacute Lom&eacute Togo Laboratory of Plant Virology Universit&eacute F&eacutelix Houphou&eumlt-Boigny P&ocircle Scientifique et d’Innovation Bingerville C&ocircte d’Ivoire Laboratoire de Physiologie et Biotechnologies Vé g&eacutetales Facult&eacute des Sciences Universit&eacute de Lom&eacute Lom&eacute Togo

cassava mosaic disease (CMD) caused by cassava Mosaic Begomoviruses (CMBs) is one of the most devastating crop diseases and a major constraint for cassava production. In order to ensure surveillance for epidemic prevention, low-cost diagnostic tools are appropriate for large-scale testing of cassava viruses. Multiplex PCR diagnosis is one approach that can reduce diagnostic costs and delays. A multiplex PCR approach was developed for simultaneous detection of African cassava mosaic virus (ACMV), East African cassava Mosaic Virus and East African cassava mosaic Cameroon virus (EACMV/CM) in Togo CMD-infected cassava leaves. Three primers pairs were used to target their respective viruses in a single tube PCR. Multiplex PCR detected ACMV, EACMV and EACMV/CM in plant DNA extracts prepared from cassava leaves infected with CMB. The primers amplified 783 bp specific to ACMV, 650 bp specific to EACMV and 560 bp specific to EACMCV/CM in both uniplex and multiplex formats. Multiplex PCR is an excellent tool for the effective control of cassava diseases. .

关键词： cassava Begomovirus CMD CMB EACMV/CM PCR Multiplex

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Incidence, Severity and Gravity of cassava Mosaic Disease in Savannah Agro-Ecological Region of DR-Congo: Analysis of Agro-Environmental Factors

引用

American Journal of Plant Sciences 2012年第4期3卷 512-519页

作者： Marcel Muengula-Manyi Kabwe K. Nkongolo Claude Bragard Patrick Tshilenge-Djim Stephan Winter Adrien Kalonji-Mbuyi Department of Biology Laurentian University Sudbury Ontario Canada Earth and Life Institute Applied Microbiology-Phytopathology Univer-sité Catholique de Louvain Louvain-la-Neuve Belgium Plant Virus Collection DSMZ Deutsche Sammlung von Mikroorganismen und Zellkuturen GmbH Braunschweig Germany Unit of Phytopathology Faculty of Agronomy University of Kinshasa Kinshasa Democratic Republic of Congo

African cassava mosaic disease (ACMD) is the most severe and widespread disease caused by viruses limiting production of the crop in sub-Saharan Africa. The objective of the present study was to evaluate CMD incidence, severity, and gravity under different agro-environmental conditions. A total of 222 fields were surveyed in 23 different locations. All the farmers grow only local cassava varieties without applications of fertilizers. Overall, mean CMD incidences for all sites surveyed were 58.2% and 51.7%, in 2009 and 2010, respectively. Disease severity ranged from 2.4 to 3.1 on a scale of 1 to 5. Mean disease gravity varied from 29.7% to 62%, in 2010, and 2009, respectively. Detailed analysis of agronomic and environmental revealed no significant association between cassava stand locations, age, land topography and the development of CMD. Likewise intercropping practices and field topping did not affect the development of CMD in all the fields surveyed. There were significant differences in the number of white flies (Bemisia tabaci) per plant in 2009 and 2010, but no significant correlations between the number of B. tabaci per plant and CMD incidence, severity, and gravity was found. In most fields, CMD appears to originate mostly from unhealthy cassava cuttings used for planting.

关键词： cassava Mosaic Disease Farmers’ Fields Agro-Environmental Factors Gandajika DR-Congo

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The difference of soluble sugar contents and starch synthetic key enzyme activities between high and low starch cultivar of cassava

引用

Journal of Life Sciences 2009年第5期3卷 21-29页

作者： LUO Xing-lu CHI Min-qing HUANG Qiu-feng Agricultural College Guangxi University Nanning 530005 China

The difference of soluble sugar contents and starch synthetic key enzyme activities between high starch cultivar and low starch cultivar were studied in this experiment, of which FuXuan01, GR891, SC124, and SC201 were used as materials. The results showed that the contents of reducing sugar in root tube of low starch cultivars were higher than those of high starch cultivars in all growth periods, the contents of sucrose in root tube of high starch cultivar were higher than those of low starch cultivars in the early growth period, but, lower in the late growth period, and there were almost no difference in the contents of soluble sugar in root tube between high starch cultivar and low starch cultivar in the early growth period, but notable difference in the late growth period and the soluble sugar contents of low starch cultivars were higher than those of high starch cultivars. It also-showed that the activities of ADPGPpase, SSS, and SBE （starch branching enzyme） of high starch cultivars were higher than those of low starch cultivars. It was evident that there were close correlations between the content of sucrose, reducing sugar and soluble sugar in root tube, and the activities of ADPGPpase, SSS, SBE, and the starch accumulation in the root tubers of cassava. It was quite evident in this experiment that the soluble sugar and starch synthetic key enzyme were main factors controlling starch accumulation in root tubers. These results provided important indication for physiological controlling in high starch cultivation and gene engineering breeding of high starch cultivar of cassava.

关键词： cassava high starch cultivar low starch cultivar: soluble sugar: starch synthetic key enzyme

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of cassava Leaf (<i>Manihot esculenta </i>) Level in Guinea-Pigs (<i>Cavia porcellus </i>) Meal on the Physico-Chemical and Techno-logical Properties of Its Meat

引用

Food and Nutrition Sciences 2015年第15期6卷 1408-1421页

作者： Christelle Laure Maguipa Tandzong Pierre Dé siré Mbougueng Hilaire Macaire Womeni Nathalie Mveugang Ngouopo Department of Biochemestry Faculty of Science University of Dschang Dschang Cameroon Department of Process Engineering National School of Agro-Industrial Sciences University of Nga-ound&eacute ré Ngaound&eacute ré Cameroon Department of Biological Science Faculty of Science University of Ngaound&eacute ré Nga-ound&eacute ré Cameroon

The present study was carried out to evaluate the effect of different rates of dried cassava leafs in diet as replacement of protein sources on the weight gain and carcass yield of guinea-pigs, as well as on the physico-chemical and technological properties of guinea-pigs’ meat. A total of forty-eight (48) eight-week-old guinea-pigs were divided in a completely randomized experimental design, in four groups and fed with the experimental foods. These experimental foods were formulated as follows: cassava-leaf (Manihot esculenta) powder was incorporated at concentrations of 0%, 8%, 10% and 12% respectively in replacement of protein sources for R0, R1, R2 and R3. Each treatment consisted of a group of 12 guinea pigs per paddock (6 males and 6 females). The initial weight (IW), final weight (FW), daily weight gain (DWG) and total gain (TG) were evaluated. At the 22nd week, animals of each group were sacrificed by bleeding, then skinned and eviscerated. Carcasses were cut, and some parts (loin, thigh and shoulder) were collected, deboned and analysed. The highest FW and carcass yield (CY) were obtained with the use of 10% cassava leafs (R2): 556 g (FW), 42.65% (CY) for males and 529.17 g (FW), 37.39% (CY) for females. The incorporation of 8% (R1) and 12% (R3) cassava leafs led to a significant increase (P cassava leafs in the diet resulted in a significant decrease in the water holding capacity and technological yield in the different parts studied. These results show that, the incorporation of cassava leafs in guinea-pigs’ diet made it possible to obtain good growth (R2) and meat of good technological quality

关键词： Guinea Pigs Diet cassava Leafs Physico-Chemical Composition Meat Technological Properties

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

White Gold: cassava as an Industrial Base

引用

American Journal of Plant Sciences 2015年第7期6卷 972-979页

作者： Nyerhovwo J. Tonukari Nyerhovwo J. Tonukari Theresa Ezedom Chinoye C. Enuma Samson O. Sakpa Oghenetega J. Avwioroko Linda Eraga Enovwo Odiyoma Department of Biochemistry Faculty of Science Delta State University Abraka Nigeria African Research Laboratories Otorho-Agbon Ethiope-East LGA Delta State Nigeria

A great number of production sectors in Africa that make use of maize, rice and wheat starches have carried out several experiments on cassava (Manihot esculenta) flour and starch, and found them to be potentially valuable substitutes. The benefits ranged from being a human staple food, constituent of animal feeds, and raw material in food processing, textile, pharmaceutical, detergent, alcohol and plastic industries to production of confectioneries like bread, spaghetti and chinchin. The vast availability of this “white gold” in most African countries can be explored in order to fully maximize its potential as an industrial base for interested entrepreneurs.

关键词： cassava (Manihot esculenta) Flour Starch Diverse Applications Industrial Base

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

QTL Analysis for Yield Related Traits with an F1 Population of Non-inbred Parents in cassava

QTL Analysis for Yield Related Traits with an F1 Population ...

引用

第十二届全国植物基因组学大会

作者： Xin Chen,Yuhua Fu,Zhiqiang Xia,Li Jie,Cheng Lu,Wenquan Wang~* Institute of Tropical Bioscience and Biotechnology,Chinese Academy of Tropical Agricultural Sciences(CATAS),Haikou 571101,China

A genetic linkage map of cassava has been generated with total 200 molecular markers which fit a 1:1 segregated ratio by using an F population of an intraspecific cross between SC6,as female parent,and Mianbao, as male *** genetic map consisted of 20 linkage groups and spanned a 1645.1 cM genetic distance with the average marker interval being *** this study,57 repeatedly detected QTL(rd-QTL) for three traits,fresh root yield,root dry matter content and root starch content of the F population were identified trial by using inclusive composite interval mapping(ICIM) software in four *** these 57

关键词： cassava genetic map quantitative trait loci(QTL) breeding

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Grasshopper Incidence and Severity of Damage as Influenced by Cyanogenic Potential in Leaf Tissue of cassava (Manihot esculenta Crantz)

引用

Advances in Molecular Imaging 2024年第3期13卷 23-38页

作者： Saffea Joseph Torto Prince Emmanuel Norman Alusaine Edward Samura Sahr Ngoba Fomba Dennis Peter Musa Johnny Ernest Norman Skeku Alfred Kanu Department of Crop Protection School of Agriculture and Food Sciences Njala University Njala Sierra Leone Sierra Leone Agricultural Research Institute (SLARI) Freetown Sierra Leone Department of Horticulture School of Natural Resources Management Njala University Njala Sierra Leone Department of Crop Science School of Agriculture and Food Sciences Njala University Njala Sierra Leone

This study assessed the effect of cyanogenic potential (CNP) in leaf tissue on grasshopper incidence and severity of damage in cassava for the identiﬁcation of parents with desired complementary traits for crossing. The experiment was conducted at the Foya Wulleh, Njala experimental site in Sierra Leone during 2020 and 2021 cropping seasons in a randomized complete block design with three replications. A total of 30 genotypes comprising 26 breeding lines, two improved and two local genotypes were assessed. Results showed a signiﬁcant (p cassava genotypes. Findings showed that the higher leaf CNP, the lower the grasshopper infestation in cassava genotypes. About two genotypes (Cooksoon and Cocoa) had low leaf CNP;three genotypes (TR0020, TR0037 and TR0013) CNP had moderately low leaf CNP;eight genotypes (SLICASS 6, TR0029, TR0032, TR0011, TR0012, TR0016-1/17, TR0002 and TR0010) had intermediate leaf CNP;seven (TR0009, TR0015-1/17, TR0036, TR0022-1/17, SLICASS 4, TR0007 and TR0026-1/17) had moderately high leaf CNP;eight (TR0008, TR0019-1/17, TR0006, TR0005, TR0021, TR0021-1/17, TR0022 and TR0024-1/17) had high leaf CNP;and two genotypes (TR0001 and TR0018-1/17) had very high leaf CNP. This suggests the indirect dependence of leaf cyanogenic potential on grasshopper infestation (incidence and severity of damage) in cassava that could be exploited for the genetic improvement of cassava for improved resistance to grasshopper infestation, nutrition and utilization of the crop.

关键词： cassava Cyanogenic Potential Grasshopper Infestation Regression Correlation Analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of Technological Treatments on cassava (Manihot Esculenta Crantz) Composition

引用

Food and Nutrition Sciences 2010年第1期1卷 19-23页

作者： Sahoré Drogba Alexis Nemlin Gnopo Jean UFR des Sciences et Technologies des Aliments Universite d"Abobo-Adjame

The composition of cassava roots and those of its derived food (attiéké and semolina), were determined. The comparative study of the cassava roots composition with those of the semolina and attiéké has shown that the technological applied treatments in the preparation of cassava meal and attiéké influenced its composition. Thus, apart from the lipids content and energy values which slightly increased, all the components (protein, ash, cellulose, carbohydrates, starch and hydrocyanic acid) decreased in food derived from cassava.

关键词： cassava Semolina Attiéké Composition Technological Treatment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Alternation of Starch Property by the Regulation of GBSSI Expression in Transgenic cassava

Alternation of Starch Property by the Regulation of GBSSI Ex...

引用

中国遗传学会植物遗传和基因组学专业委员会2009年学术研讨会

作者： Shanshan Zhao,and Peng Zhang~* SIBS-ETH Shanghai Center for cassava Biotechnology,National Laboratory of Plant Molecular Genetics, Institute of Plant Physiology & Ecology,Shanghai Institutes for Biological Sciences,Chinese Academy of Sciences,300 Fenglin Road,Shanghai 200032,China

cassava starch has wide-range of bioindustrial applications because of its unique property such as low levels of fat,protein,phosphorus *** further extend its application potential,development of cassava starch with d... 详细信息

关键词： cassava starch GBSSI RNA interference genetic engineering

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：