检索结果-南通市图书馆

Improving the nutritional values of yellow mealworm Tenebrio molitor(Coleoptera: Tenebrionidae) larvae as an animal feed ingredient: a review

引用

Journal of Animal Science and Biotechnology 2024年第1期15卷 35-52页

作者： Linggawastu Syahrulawal Magnhild Oust Torske rumakanta sapkota Geir Næss Prabhat Khanal Animal Science Production and Welfare DivisionFaculty of Biosciences and AquacultureNord UniversitySkolegata 22Steinkjer 7713Norway Department of Environmental Science Faculty of Technical SciencesAarhus UniversityFrederiksborgvej 399Roskilde 4000Denmark

Yellow mealworm larvae(YML;Tenebrio molitor) are considered as a valuable insect species for animal feed due to their high nutritional values and ability to grow under different substrates and rearing conditions. Advances in the understanding of entomophagy and animal nutrition over the past decades have propelled research areas toward testing multiple aspects of YML to exploit them better as animal feed sources. This review aims to summarize various approaches that could be exploited to maximize the nutritional values of YML as an animal feed ingredient. In addition, YML has the potential to be used as an antimicrobial or bioactive agent to improve animal health and immune function in production animals. The dynamics of the nutritional profile of YML can be influenced by multiple factors and should be taken into account when attempting to optimize the nutrient contents of YML as an animal feed ingredient. Specifically, the use of novel land-based and aquatic feeding resources, probiotics, and the exploitation of larval gut microbiomes as novel strategies can assist to maximize the nutritional potential of YML. Selection of relevant feed supplies, optimization of ambient conditions, the introduction of novel genetic selection procedures, and implementation of effective post-harvest processing may be required in the future to commercialize mealworm production. Furthermore, the use of appropriate agricultural practices and technological improvements within the mealworm production sector should be aimed at achieving both economic and environmental sustainability. The issues highlighted in this review could pave the way for future approaches to improve the nutritional value of YML.

关键词： Alternative protein source Feed application Nutritional value Yellow mealworm

来源：

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

The importance of laminin at the blood-brain barrier

引用

Neural Regeneration Research 2023年第12期18卷 2557-2563页

作者： Sebok K.Halder Arjun sapkota Richard Milner San Diego Biomedical Research Institute San DiegoCAUSA

The blood-brain barrier is a unique property of central nervous system blood vessels that protects sensitive central nervous system cells from potentially harmful blood *** mechanistic basis of this barrier is found at multiple levels,including the adherens and tight junction proteins that tightly bind adjacent endothelial cells and the influence of neighboring pericytes,microglia,and astrocyte *** addition,extracellular matrix components of the vascular basement membrane play a critical role in establishing and maintaining blood-brain barrier integrity,not only by providing an adhesive substrate for blood-brain barrier cells to adhere to,but also by providing guidance cues that strongly influence vascular cell *** extracellular matrix protein laminin is one of the most abundant components of the basement membrane,and several lines of evidence suggest that it plays a key role in directing blood-brain barrier *** this review,we describe the basic structure of laminin and its receptors,the expression patterns of these molecules in central nervous system blood vessels and how they are altered in disease states,and most importantly,how genetic deletion of different laminin isoforms or their receptors reveals the contribution of these molecules to blood-brain barrier function and ***,we discuss some of the important unanswered questions in the field and provide a“to-do”list of some of the critical outstanding experiments.

关键词： astrocytes basement membrane blood vessels blood-brain barrier integrity dystroglycan endothelial cells inflammation integrins laminin pericytes

来源：

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

Discovery and genome-guided mapping of REN12 from Vitis amurensis, conferring strong, rapid resistance to grapevine powdery mildew

引用

Horticulture Research 2023年第5期10卷 139-149页

作者： Surya sapkota Cheng Zou Craig Ledbetter Anna Underhill Qi Sun David Gadoury Lance Cadle-Davidson School of Integrative Plant Science Cornell AgriTechCornell UniversityGenevaNY14456USA BRC Bioinformatics Facility Institute of BiotechnologyCornell UniversityIthacaNY14853USA United States Department of Agriculture(USDA)-Agricultural Research Service(ARS) Crop DiseasesPests and Genetics Research UnitSan Joaquin Valley Agricultural Sciences CenterParlierCA93648USA USDA-ARS Grape Genetics Research UnitGenevaNY14456USA

Powdery mildew resistance genes restrict infection attempts at different stages of ***,a strong and rapid powdery mildew resistance phenotype was discovered from Vitis amurensis‘PI 588631’that rapidly stopped over 97%of Erysiphe necator conidia,before or immediately after emergence of a secondary hypha from *** resistance was effective across multiple years of vineyard evaluation on leaves,stems,rachises,and fruit and against a diverse array of *** laboratory *** core genome rhAmpSeq markers,resistance mapped to a single dominant locus(here named REN12)on chromosome 13 near 22.8–27.0 Mb,irrespective of tissue type,explaining up to 86.9%of the phenotypic variation observed on *** sequencing of recombinant vines using skim-seq technology enabled the locus to be further resolved to a 780 kb region,from 25.15 to 25.93 *** analysis indicated the allele-specific expression of four resistance genes(NLRs)from the resistant ***12 is one of the strongest powdery mildew resistance loci in grapevine yet documented,and the rhAmpSeq sequences presented here can be directly used for marker-assisted selection or converted to other genotyping *** no virulent isolates were identified among the genetically diverse isolates and wild populations of *** tested here,NLR loci like REN12 are often ***,stacking of multiple resistance genes and minimal use of fungicides should enhance the durability of resistance and could enable a 90%reduction in fungicides in low-rainfall climates where few other pathogens attack the foliage or fruit.

关键词： Vitis resistance durability

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

Onecut transcription factors in retinal development and maintenance

引用

Neural Regeneration Research 2015年第6期10卷 899-900页

作者： Darshan sapkota Xiuqian Mu Department of Ophthalmology/Ross Eye Institute Department of Biochemistry New York State Center of Excellence in Bioinformatics and Life Sciences SUNY Eye Institute University at Buffalo

The retina and its development： The retina is an essential part of the visual system. A myriad of eye diseases are characterized by retinal degeneration, caused by either genetic or environmental factors. This underscores the importance of studying the genetic and molecular mechanisms that regulate the generation and maintenance of neurons in the mammalian retina. Our recent studies demonstrate that two related transcription factors Onecutl （Ocl） and Onecut2 （0c2） regulate multiple cell fates in the mouse retina, and their absence results in progressive retinal neurodegeneration （Wu et al., 2012, 2013; sapkota et al., 2014）.

关键词： cell Onecut transcription factors in retinal development and maintenance RGCs

来源：

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

Molecular and genetic regulations of fleshy fruit shape and lessons from Arabidopsis and rice

引用

Horticulture Research 2023年第7期10卷 176-191页

作者： Qiang Li Shuangxia Luo Liying Zhang Qian Feng Lijun Song Manoj sapkota Shuxin Xuan Yanhua Wang Jianjun Zhao Esther van der Knaap Xueping Chen Shuxing Shen College of Horticulture State Key Laboratory of North China Crop Improvement and RegulationKey Laboratory of Vegetable Germplasm Innovation and Utilization of HebeiCollaborative Innovation Center of Vegetable Industry in HebeiHebei Agricultural UniversityBaodingHebei 071000China Center for Applied Genetic Technologies Institute for Plant BreedingGenetics and GenomicsDepartment of HorticultureUniversity of GeorgiaAthensGAUSA

Fleshy fruit shape is an important external quality trait influencing the usage of fruits and consumer ***,modification of fruit shape has become one of the major objectives for crop ***,the underlying mechanisms of fruit shape regulation are poorly *** this review we summarize recent progress in the genetic basis of fleshy fruit shape regulation using tomato,cucumber,and peach as *** analyses suggest that the OFP-TRM(OVATE Family Protein-TONNEAU1 Recruiting Motif)and IQD(IQ67 domain)pathways are probably conserved in regulating fruit shape by primarily modulating cell division patterns across fleshy fruit ***,cucumber homologs of FRUITFULL(FUL1),CRABS CLAW(CRC)and 1-aminocyclopropane-1-carboxylate synthase 2(ACS2)were found to regulate fruit *** also outline the recent progress in fruit shape regulation mediated by OFP-TRM and IQD pathways in Arabidopsis and rice,and propose that the OFP-TRM pathway and IQD pathway coordinate regulate fruit shape through integration of phytohormones,including brassinosteroids,gibberellic acids,and auxin,and microtubule *** addition,functional redundancy and divergence of the members of each of the OFP,TRM,and IQD families are also *** review provides a general overview of current knowledge in fruit shape regulation and discusses the possible mechanisms that need to be addressed in future studies.

关键词： Arabidopsis Molecular probably

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

Species diversity and regeneration of old-growth seasonally dry Shorea robusta forests following gap formation

引用

Journal of Forestry Research 2009年第1期20卷 7-14页

作者： Indra Prasad sapkota Mulualem Tigabu Per Christer Oden Department of Forest Genetics and Plant Physiology Swedish University of Agricultural Sciences SE-901 83 Umea Sweden.

Diversity and regeneration of woody species were investigated in two ecological niches viz. gap and intact vegetation in old-growth seasonally dry Shorea robusta （Gaertn. f.） forests in Nepal. We also related varieties of diversity measures and regeneration at- tributes to gap characteristics. Stem density of tree and shrub components is higher in the gap than in the intact vegetation. Seedling densities of S. robusta and Terminalia alata （B. Heyne ex Roth.） are higher in the gap than in the intact vegetation, while contrary result is observed for T. bellirica （Gaertn. ex Roxb.） and Syzigium cumini （L. Skeels） in term of seedling density. The complement of Simpson index, Evenness index, and species-individual ratio in the seedling layer are lower in the gap than the intact vegetation. Gap size can explain species richness and species establishment rate. Gaps created by multiple tree falls in different years have higher seedling density of S. robusta than gaps created by single and/or multiple tree falls in the same year. In conclusion, gaps maintain species diversity by increasing seedling density, and favor regeneration of Sal forests. In addition to gap size, other gap attributes also affect species diversity and regeneration.

关键词： Canopy gap intermediate disturbance hypothesis Nepal Sal (Shorea robusta Gaertn. f.) forest

来源：

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

Gap characteristics and their effects on regeneration,dominance and early growth of woody species

引用

Journal of Plant Ecology 2009年第1期2卷 21-29页

作者： Indra Prasad sapkota Per Christer Oden Swedish University of Agricultural Sciences Southern Swedish Forest Research CentreTropical Silviculture and Seed Science GroupPO Box 49SE-23053 AlnarpSweden

Aims We aim to examine the canopy gap characteristics and evaluate their influence on regeneration,dominance and the early growth of woody species in seasonally dry Shorea robusta forests(Sal forests).Methods Sixty canopy gaps were surveyed in six randomly located transects belts in seasonally dry subtropical Sal forests of central *** transect belt was followed until 10 gap sites were *** equation for the area of an ellipse was used to calculate the size of canopy gap,measuring the longest axis and its perpendicular shorter ***,sizes,ages and causes of tree falls creating canopy gaps along with number and sizes of border trees were identified and *** gap inventories were carried out using square 25-m2 quadrats placed in the middle of each *** individuals>2 m in height within the quadrat were identified at the species level and their diameter at breast height was *** assigned a nested 4-m2 quadrat to the corner of each 25-m2 quadrat,within which all woody individuals>10 cm tall were identified at the species level,and counted them and their regeneration mechanisms were *** height and collar diameter of the tallest individuals were *** statistics was calculated for the variables of interests and Pearson correlation,linear regression,independent-sample t-test and chi-square test were used to relate them and to test for their *** Findings The study found mean gap size of 283 m2 and;50%gaps of 10–15 years *** created by natural single-tree falls were significantly more numerous,and their mean size was significantly smaller than those resulting from artificial causes or multiple-tree *** size correlated with the basal area of felled trees,but it did not correlate with the number of tree *** tree fall basal area was significantly positively correlated to the seed-originated seedling to resprout ratio,it was negatively correlated,along with gap area and th

关键词： canopy gap seedling density seedling growth basal area Sal forests Nepal

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

Perspectives of CRISPR/Cas-mediated cisengineering in horticulture:unlocking the neglected potential for crop improvement

引用

Horticulture Research 2020年第1期7卷 2317-2327页

作者： Qiang Li Manoj sapkota Esther van der Knaap College of Horticultural Science and Engineering Shandong Agricultural UniversityTai’anChina Center for Applied Genetic Technologies University of GeorgiaAthensGAUSA Institute for Plant Breeding Genetics and GenomicsUniversity of GeorgiaAthensGAUSA Department of Horticulture University of GeorgiaAthensGAUSA

Directed breeding of horticultural crops is essential for increasing yield,nutritional content,and consumer-valued characteristics such as shape and color of the ***,limited genetic diversity restricts the amount of crop improvement that can be achieved through conventional breeding *** genetic changes in cisregulatory regions of genes play important roles in shaping phenotypic diversity by altering their *** of CRISPR/Cas editing in crop species can accelerate crop improvement through the introduction of genetic variation in a targeted *** advent of CRISPR/Cas-mediated cis-regulatory region engineering(cis-engineering)provides a more refined method for modulating gene expression and creating phenotypic diversity to benefit crop ***,we focus on the current applications of CRISPR/Cas-mediated cis-engineering in horticultural *** describe strategies and limitations for its use in crop improvement,including de novo cis-regulatory element(CRE)discovery,precise genome editing,and transgene-free genome *** addition,we discuss the challenges and prospects regarding current technologies and ***/Cas-mediated cis-engineering is a critical tool for generating horticultural crops that are better able to adapt to climate change and providing food for an increasing world population.

关键词： CRISPR/Cas breeding crops

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

尼泊尔加德满都谷地区高校汉语教学现状调查研究

尼泊尔加德满都谷地区高校汉语教学现状调查研究

引用

作者：张开（sapkota PRAKASH）浙江师范大学

学位级别：硕士

随着中尼两国经济文化合作的逐渐加深,汉语教学也不断发展,尤其是这几年尼泊尔汉语教学的学习者数量和汉语课程开设总量都取得了突破。笔者作为一名尼泊尔籍的来华留学生,一直以来都关注尼泊尔汉语教学发展,尼泊尔加德满都谷地区汉语教... 详细信息

随着中尼两国经济文化合作的逐渐加深,汉语教学也不断发展,尤其是这几年尼泊尔汉语教学的学习者数量和汉语课程开设总量都取得了突破。笔者作为一名尼泊尔籍的来华留学生,一直以来都关注尼泊尔汉语教学发展,尼泊尔加德满都谷地区汉语教学有着悠久的历史,中小学汉语教学方面的研究成果也相对丰富,但学界对该地区高校的汉语教学研究方面未给予足够关注。本文以尼泊尔加德满都谷地区最具代表性的四所高校——特里布文大学世界语言学院、加德满都大学孔子学院、加德满都管理学院和ACE BUSINESS SCHOOL汉语教学为研究对象,通过问卷调查和访谈,探析加德满都谷地区高校汉语教学现状,剖析高校汉语教学存在的问题,并提出相应的改进措施。研究发现,本土汉语教师发展状况日渐提升;生源主要来自商务管理、旅游与酒店管理专业学生;汉语课程主要集中在语言培训;现有的教材有三种《HSK标准教程》、《汉语口语速成》和《新实用汉语课本》。该地区的汉语教学存在着以下问题:汉语教师比例不平衡,缺少中国教师;缺少正版教材、没有本土教材;汉语课程设置单一,课程类型主要是综合课,大部分高校不进行分技能教学;公立学校的教学条件比较差,教学资源不足等等。基于以上研究结果,笔者从政府、孔子学院、学校、教材和教师五个层面提出了相关对策,以期对尼泊尔加德满谷地区汉语教学提供一定的启示与借鉴。

关键词：尼泊尔加德满都谷地区高校汉语教学

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Investigation of air pollution concentration in Kathmandu valley during winter season

引用

Journal of Environmental Sciences 2005年第6期17卷 1008-1013页

作者： KONDO Akira KAGA Akikazu IMAMURA Kiyoshi INOUE Yoshio SUGISAWA Masahiko SHRESTHA Manohar Lal sapkota Balkrishan Graduate School of Engineering Department of Environmental Engineering Osaka University JapanGraduate School of Engineering Department of Environmental Engineering Osaka University JapanEnvironmental Pollution Control Center Osaka Prefecture JapanGraduate School of Engineering Department of Environmental Engineering Osaka University JapanGraduate School of Engineering Department of Environmental Engineering Osaka University JapanGraduate School of Engineering Department of Environmental Engineering Osaka University JapanInstitute of Engineering Pulchok Tribhuvan University Nepal

The monthly concentrations of NO2, NOx, SO2 and O3 measured by a passive sampler from February 2003 to January 2004 showed that the air pollution during the winter season in Kathmandu valley was higher than the summer season. The O3 level was found the highest during April, May and June due to strong radiation. The hourly concentrations of NO2, NOx, O3 and suspended particulate matter（SPM） were also measured by automatic instruments on December 2003. Temperature at the height of 60 m and 400 m at Raniban Mountain in the northwest of Kathmandu valley was measured on February 2001 in the winter season and the average potential temperature gradient was estimated from observed temperature. Wind speed was also measured at the department of hydrology, airport section, from 18 February to 6 March 2001. It was found that the stable layer and the calm condition in the atmosphere strongly affected the appearance of the maximum concentrations of NO2 and SPM in the morning, and that the unstable layer and the windy condition in the atmosphere was considerably relevant to the decrease of air pollution concentrations at daytime. The emission amounts of NOx, HCs and total suspended particle（TSP） from transport sector in 2003 were estimated from the increasing rate of vehicles on the basis of the emission amounts in 1993 to be 3751 t/a, 30570 t/a and 1317 t/a, respectively. The diurnal concentrations in 2003 calculated by the two-layers box model reproduced the characteristics of air pollution in Kathmandu valley such as the maximum value of O3 and its time, the maximum value of NO in the morning, and the decrease of NO and NO2 at daytime. The comparison with the concentrations in 1993 calculated suggested that the main cause of air pollution was the emission from transport sector.

关键词： air pollution concentration Kathmandu vallay box model

来源：

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

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：