检索结果-南通市图书馆

Variation in Yellow Root Cassava (Manihot esculentus Crantz) Genotypes and Phenotypic Relationship for Selected Postharvest and Morphological Traits

Advances in Entomology（昆虫学） 2024年第3期 143页

作者： Saffea Joseph Torto Abu James Sundufu Alusaine Edward Samura Sahr Ngoba Fomba Dennis Peter Musa Skeku Alfred Kanu prince emmanuel norman4

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Agricultural Sciences 2024年第9期15卷 993-1008页

作者： Suffian Mansaray prince emmanuel norman Joseph Sherman-Kamara Isata Kamanda Kadiatu Nannah Serry Post-Harvest and Nutrition Sierra Leone Agricultural Research Institute (SLARI) Tower Hill Freetown Sierra Leone Department of Agriculture Engineering School of Technology Njala University Njala Campus Bo Sierra Leone Germplasm Enhancement and Seeds System Sierra Leone Agricultural Research Institute (SLARI) Tower Hill Freetown Sierra Leone

This study evaluated the variation in yellow root cassava (Manihot esculentus Crantz) genotypes and phenotypic relationship for selected postharvest and morphological traits. The trial was established at the Njala Agricultural Research Centre experimental site, Njala, during 2017/2018 cropping season in a randomized complete block design with three replications. Findings showed that the higher the total carotene content (TCC) in yellow flesh cassava genotypes, the longer the rate of postharvest physiological deterioration (PPD). Genotypes TR-0051-TCC/17 and TR-0012-TCC/17 recorded higher TCC (18.9 µg/g and 13.6 µg/g) and longer rate of PPD (4.29 and 3.14), respectively. Genotypes TR-0051-TCC/17, TR-0016-TCC/17, TR-0028-TCC/17, TR-0012-TCC/17 and TR-0020-TCC/17 had the highest TCC values of 18.9 µg/g, 16.09 µg/g, 14.72 µg/g, 13.6 µg/g and 11.23 µg/g with corresponding higher color chart values of 6, 6, 6, 5, and 6, respectively. This suggests the direct dependence of TCC on the root parenchyma color intensity in yellow flesh cassava genotypes. Findings also show a direct relationship between morphological and postharvest traits in yellow flesh cassava genotypes that could be exploited for the genetic improvement of cassava for increased shelf life, nutrition and related quality traits, as well as conservation and utilization of the crop.

关键词： Cassava Variability Regression Correlation Postharvest and Morphological Traits

Genetic Structure and Diversity Study of Cassava (Manihot esculenta) Germplasm for African Cassava Mosaic Disease and Fresh Storage Root Yield

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Genetics 2023年第1期13卷 23-47页

作者： Janatu Veronica Sesay Aiah Lebbie Richard Wadsworth Ephraim Nuwamanya Souleymane Bado prince emmanuel norman Sierra Leone Agricultural Research Institute PMB 1313 Tower Hill Freetown Sierra Leone Department of Biological Sciences School of Environmental Sciences Njala University Njala Sierra Leone Makerere University Kampala Kampala Uganda Department of Plant Science Phytoprise GmbH DI Rudolf Schober-StraBe 4 7400 Oberwart Oberwart Austria

A better understanding of population structure and genetic diversity among cassava germplasm for African cassava mosaic disease and fresh root yield traits is useful for cassava improvement programme. Phenotype-based selection for these traits is cumbersome due to phenotypic plasticity and difficulty in screening of phenotypic-induced variations. This study assessed quantitative trait loci (QTL) regions associated with African cassava mosaic disease (ACMD) and fresh storage root yield (FSRY) in 131 cassava (Manihot esculenta) genotypes using a genome-wide association study (GWAS). The single nucleotide polymorphism (SNP) loci and associated candidate genes, when validated, would be a valuable resource for marker-assisted selection in the breeding process for development of new cassava genotypes with improved resistance to ACMD and desirable high root yield. Population structure analysis using 12,500 SNPs differentiated the 131 genotypes into five distinct sub-groups (K = 5). Marker-trait association (MTA) analysis using the generalized linear model identified two QTL regions significant for ACMD and three for FSRY. This study demonstrated that DArTseq markers are useful genomic resources for genome-wide association studies of ACMD and FSRY traits in cassava for the acceleration of varietal development and release.

关键词： Population Structure Genetic Variability GWAS SNP Markers Cassava

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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 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

Oviposition Site Preference and Its Effects on Subsequent Development of Variegated Grasshopper (Zonocerus variegatus L.) under Laboratory Conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Entomology 2024年第3期12卷 143-154页

作者： Saffea Joseph Torto Abu James Sundufu Alusaine Edward Samura Sahr Ngoba Fomba Dennis Peter Musa Skeku Alfred Kanu prince emmanuel norman Department of Crop Protection School of Agriculture and Food Sciences Njala 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 Germplasm Enhancement and Seeds Systems Sierra Leone Agricultural Research Institute Freetown Sierra Leone

Female grasshoppers can affect the fitness of their offspring through their selection of oviposition site. Knowledge of soil type on oviposition, and its effects on subsequent development can provide guidelines for habitat manipulations that reduce the harmful effects of these pests on farmers fields. The influence of soil types on the oviposition site preference of variegated grasshopper (Zonocerus variegatus L.) reared some cassava (Manihot esculenta Crantz) varieties, was investigated in a cage trial carried out at the Bio factory laboratory, School of Agriculture and Food Sciences, Njala University, Sierra Leone during 2022/2023. The treatments comprised three soil types (Sandy, Loamy and Clay), each with three replications laid out in a randomized complete block design (RCBD) in wooden cages. Data were collected on the following development parameters including, Net reproductive growth ratio (R0), Generation time (Tc), Intrinsic rate of increase (rm), Finite rate of increase (), Doubling time (Dt), and overall survivorship. Findings revealed that, Z. variegatus L. preferred sandy soil in which, on average, most eggs were deposited (338, 6.62 4.40), followed by loamy soil, 286 (5.53 3.96), and then, clayey soil, 200 (3.91 3.85);though, the differences were not significant. This study established that Z. variegatus deposited more eggs in sandy soil > loamy soil > clayey soil, respectively;and subsequent survivorship of the immature unto mature adult insect, revealed a similar order. This indicates that the sandy soil is the most preferred substrate for oviposition and subsequent development into adult insects.

关键词： Development Oviposition Oviposition Site Preference Soil Types Variegated Grasshopper

Comparative Evaluation of Antitumor Chinese Patent Medicine Injections Based on Evidence-Based Medicine and Markov Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Traditional Chinese Medicine 2024年第2期10卷 220-229页

作者： Jing Yang Yan-Peng Wang Wen-Gong Yu Yu-Yao Guan prince emmanuel Opoku Amponsah Xian-Shuai Tang Ying-Zi Sun Lei Zheng School of Medicine and Pharmacy Ocean University of ChinaQingdaoChina Department of Pharmacy Shandong Medical CollegeJinanChina Department of Pharmacy Cheeloo College of MedicineShandong Provincial Third HospitalShandong UniversityJinanChina Biomedical Engineering Graduate School University of ArizonaTucsonAZUSA

Objective: The objective of this study was to explore the safety, efficacy, economy, and other aspects of frequently-used antitumor Chinese patent medicine injections through a comprehensive evaluation of evidence-based medical research to provide scientific information and decision-making basis for drug selection, rational drug use, public awareness of safe drug use, and medical insurance. Materials and Methods: The names of five frequently used antitumor Chinese patent medicine injections were used as search terms, including the compound Sophora flavescens injection, Kangai injection, Aidi injection, Kanglaite injection, and Brucea javanica oil emulsion injection. Relevant evidence-based medical research was extracted from the databases. A descriptive evaluation was conducted, and the Markov model was used for the cost-benefit analysis. Finally, the above injections are ranked by comprehensive scores using the multi-criteria decision analysis and Delphi method. Results: The five injections had their own advantages in enhancing the effectiveness of anti-tumor treatments, improving the quality of life for cancer patients, and reducing the incidence of adverse reactions. From the perspective of economy and other attributes, compound S. flavescens was superior to B. javanica oil, Aidi, Kangai, and Kanglaite. After a comprehensive evaluation of the above five injections, the compound S. flavescens injection received the highest score. Conclusions: Compound S. flavescens, Kangai, Aidi, B. javanica oil, and Kanglaite have their own advantages in effectiveness and no significant difference in safety. Compound S. flavescens injection has the highest comprehensive score. Clinical attention should be paid to monitoring the initial stage of medication and special groups.

关键词： Anti-tumor Chinese patent medicine comprehensive evaluation medication safety pharmacoeconomics rational drug use

Evaluation of Condom Use among University Undergraduates in Port Harcourt, Nigeria

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Biosciences and Medicines 2020年第5期8卷 31-41页

作者： emmanuel Okwudili Oranu prince Atochi Woruka Esther Nonye-Enyindah Department of Obstetrics and Gynaecology University of Port Harcourt Teaching Hospital Port Harcourt Nigeria Department of Obstetrics and Gynaecology Rivers State University Teaching Hospital Port Harcourt Nigeria

Background: Barrier contraception has the beauty of dual protection—against pregnancy and sexually transmitted infections. Following the persisting burden of unsafe abortion and human immunodeficiency virus (HIV), much sensitization/campaign has been ongoing in the past few decades by government and non-governmental organisations (NGOs) in Nigeria against unprotected sexual intercourse. The youth are generally assumed to have high risk sexual behaviour, hence this study on Port Harcourt university undergraduates. Objectives: To determine the awareness and use of condom among University undergraduates in Port Harcourt. Methods: The study was a prospective descriptive cross-sectional study of 636 undergraduate students of the University of Port Harcourt and Rivers state University, South-south Nigeria. The multistage sampling technique was used to randomly select participants and data collected using a pretested structured self administered questionnaire. Data was analyzed using version 23.0 SPSS and reported in means, frequencies and percentages. Probability value was set at 5% (p χ2 = 200.602). Only 5.5% of the respondents in this study were willing to know their HIV status. Conclusion: There is a high level of condom awareness among Port Harcourt University undergraduates. Surprisingly, their practice of unprotected sexual intercourse is still high.

关键词： Condom Use Unprotected Intercourse Port Harcourt

Genetic and Agronomic Parameter Estimates of Growth, Yield and Related Traits of Maize (Zea mays L.) under Different Rates of Nitrogen Fertilization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2024年第4期15卷 274-291页

作者： prince emmanuel norman Lansana Kamara Aloysius Beah Kelvin Sahr Gborie Francess Sia Saquee Sheku Alfred Kanu Fayia Augustine Kassoh Yvonne Sylvia Gloria Ethel norman Abdul Salaam Kargbo Sierra Leone Agricultural Research Institute (SLARI) Freetown Sierra Leone School of Agriculture Njala University Njala Campus Njala Sierra Leone School of Natural Resources Management Njala University Njala Campus Njala Sierra Leone Department of Agro Biotechnology Institute of Agriculture RUDN University Moscow Russia Faculty of Development Agriculture & Natural Resources Management Eastern Technical University of Sierra Leone Kenema Sierra Leone

This study evaluated the genetic and agronomic parameter estimates of maize under different nitrogen rates. The trial was established at the Njala Agricultural Research Centre experimental site during 2021 and 2022 in a split block design with three maize varieties (IWCD2, 2009EVDT, and DMR-ESR-Yellow) and seven nitrogen (0, 30, 60, 90, 120, 150 and 180 kg∙N∙ha−1) rates. Findings showed that cob diameter and anthesis silking time (ASI) had intermediate heritability, ASI had high genetic advance, ASI and grain yield had high genotypic coefficient of variation (GCV), while traits with high phenotypic coefficient of variation (PCV) were plant height, ASI, grain yield, number of kernel per cob, number of kernel rows, ear length, and ear height. The PCV values were higher than GCV, indicating the influence of the environment in the studied traits. Nitrogen rates and variety significantly (p −1 plots exhibiting the lowest and highest grain yields of 1238 kg∙ha−1 and 2098 kg∙ha−1, respectively. Variety and nitrogen effects on partial factor productivity (PFPN), agronomic efficiency (AEN), net returns (NR), value cost ratio (VCR) and marginal return (MR) indicated that these parameters were significantly affected (p N (41.3 kg grain kg−1∙N) and AEN (29.4 kg grain kg−1∙N) were obtained in the 30 kg∙N∙ha−1 plots, while the highest VCR (2.8) and MR (SLL 1.8 SLL−1 spent on N) were obtained in the 180 kg∙N∙ha−1. The significant influence of variety and nitrogen on traits suggests that increasing yields and maximizing profits require use of appropriate nitrogen fe

关键词： Nitrogen Rates Genetic and Agronomic Estimates Introduced Genotypes Grain Yield Zea mays

Prospects of Robot Laser Cutting in the Era of Industry 4.0

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Engineering and Technology 2022年第3期10卷 639-655页

作者： emmanuel Afrane Gyasi Arttu Antila prince Owusu-Ansah Paul Kah Antti Salminen Department of Automotive and Agricultural Mechanization Engineering Kumasi Technical University Kumasi Ghana Suomen Vesileikkaus Oy Keuruu Finland Division of Welding Technology University West Trollh&auml ttan Sweden Department of Mechanical Engineering University of Turku Turku Finland

Laser cutting is a non-contact thermal cutting process and an integral part of manufacturing. In metal processing, laser cutting is at the forefront of the manufacturing chain followed by joining and manufacturing processes like welding. The future of metal manufacturing processes like laser cutting shall rely on intelligent systems such as automation and robotics based on the advancement of technology and digital transformation spearheaded by Industry 4.0. Moreover, the digital transition where robots and automated systems are key drivers creates a broader platform to utilize energy-efficiency materials. Such energy-efficient materials include high-strength steels (HSS) for structural applications (e.g. bio-energy structures, wind turbines, ice-going vessels) onshore, offshore and in the Arctic region. The aim of this paper is to elucidate the prospects of robot laser cutting systems in the framework of integrated metal manufacturing in future factories. Previous studies on laser cutting technologies are examined based on scientific and industrial perspectives. Robot laser cutting system is compared with the well-known flat-bed laser cutting CNC machine in several aspects including flexibility in manufacturing, ease for digitalization, off-line capabilities and investment analysis. The findings shall help to determine the competitiveness of robot laser cutting systems with flat-bed laser cutting CNC machines, especially when considering metal manufacturing in small and medium-sized enterprises (SMEs). The outcome of this study is to stir up experimental and computational research on robot laser cutting systems of metals, and help companies in their decision-making process when deciding which laser cutting system will best suit their manufacturing operations in the future.

关键词： Laser Cutting Robots Automation Integrated Manufacturing Digitalization Metals

Evaluation of concentrations of trace metal(loid)s in indigenous crab species and human health risk implications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Emerging Contaminants 2022年第1期8卷 371-380页

作者： prince Onyedinma Ukaogo Jian Tang Ahamefula Anselm Ahuchaogu Okenwa Uchenna Igwe Anthony I.Obike Precious Onyinyechi Emole Loai Aljerf Ojah emmanuel Onah Ali Tijjani Atem Bethel Ajong Analytical/Environmental Units Department of Pure and Industrial ChemistryAbia State UniversityUturuNigeria Faculty of Information Technology Beijing University of TechnologyBeijing100124China Beijing Laboratory of Smart Environmental Protection Beijing100124China Department of Chemistry Michael Okpara University of AgricultureUmudikeAbia StateNigeria Key Laboratory of Organic Industries Department of ChemistryFaculty of SciencesDamascus UniversityDamascusSyria Department of Chemistry University of IbadanIbadanNigeria Department of Applied Chemistry Federal University of Dutsin-maKatsina StateNigeria Department of Biochemistry Faculty of SciencesUniversity of DschangDschangCameroon

Despite the nutritional benefits of crab consumption,the bioaccumulation of hazardous trace metals(loid)in crabs can endanger consumers’*** consumption of crab has received less ***,Cd,Cr,Cu,Li,Hg,Fe,Pb and Zn in four common crab species collected from the bank of selected streams and the associated health risks were analyzed for the consumers by evaluating estimated weekly intake(EWI),non-carcinogenic and carcinogenic health risks to children,adolescents,and *** this study,320 samples were collected in *** crab and sediment samples showed a descending average content of Fe>Zn>Cu>Cr>Pb>As>Cd>Li>Hg,*** values of children,adolescents,and adults were all lower than provisional tolerable weekly intakes(PTWIs)of all crab *** to the toxic hazard quotient(THQ)and the total hazard index(HI)calculations for trace metal contents in the crabs,mercury did not pose any risk to human health;whereas,the other determined trace metals(loid)gave the values of HI>1 and showed a possibility of risk on the long *** all age groups,the consumption of ***,***,and *** would lead to lifetime cancer risk due to As and Cd ***,Statistical analysis reveals the origin of the contaminants in the crabs,and indicate that Cr,Zn,Pb,and Cd are from anthropogenic activities while the other metals originate from natural lithogenic actions.

关键词： Crab Anthropogenic Carcinogenic Target hazard quotient Bioaccumulation Trace metals(loid)