检索结果-南通市图书馆

Evaluation of root traits and water use efficiency of different cotton genotypes in the presence or absence of a soil-hardpan

引用

The Crop Journal 2021年第4期9卷 945-953页

作者： Ricardo St Aime Grace Rhodes Michael Jones BTodd Campbell Sruthi narayanan Department of Plant and Environmental Sciences Clemson UniversityClemsonSC 29634USA Medical University of South Carolina SC 29425USA Pee Dee Research and Education Center Clemson UniversityFlorenceSC 29506USA USDA-ARS Coastal Plain SoilWater and Plant Conservation ResearchFlorenceSC 29501USA

Cotton(Gossypium spp.) is an important fiber and oil crop grown worldwide. Water and nutrient stresses are major issues affecting cotton production globally. Root traits are critical in improving water and nutrient uptake and maintaining plant productivity under optimal as well as drought ***, root traits have rarely been utilized in cotton breeding programs, a major reason being the lack of information regarding genetic variability for root traits. The objective of this research was to evaluate ten selected cotton genotypes for root traits and water use efficiency. The tested genotypes included germplasm lines(PD 1 and PD 695) and cultivars that are currently grown in the southeastern USA(PHY 499 WRF, PHY 444 WRF, PHY 430 W3 FE, DP 1646 B2 XF, DP 1538 B2 XF, DP 1851 B3 XF, NG5007 B2 XF, and ST 5020 GLT). Experiments were conducted under controlled environmental conditions in 2018 and 2019. A hardpan treatment was included in the second year to evaluate the effect of a soil hardpan on root traits and water use efficiency. Genotype PHY 499 WRF ranked at the top and NG5007 B2 XF ranked at the bottom for root morphological traits(total and fine root length, surface area,and volume) and root weight. PHY 499 WRF was also one of the best biomass producers and had high water use efficiency. PHY 444 WRF, PHY 430 W3 FE, and PD-1 were the other best genotypes in terms of root traits and water use efficiency. All genotypes had higher values for root traits and water use efficiency under hardpan conditions. This trend indicates a horizontal proliferation of root systems when they incur a stress imposed by a hardpan. The genotypic differences identified in this research for root traits and water use efficiency would be valuable for selecting genotypes for cotton breeding programs.

关键词： Cotton Root traits Water use efficiency Hardpan Genetic variability

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

Inverted internal limiting membrane flap technique for very large macular hole

引用

International Journal of Ophthalmology(English edition) 2016年第8期9卷 1230-1232页

作者： Mitali Khodani Pooja Bansal Raja narayanan Jay Chhablani Kanuri Santhamma Retina Vitreous Centre LV Prasad Eye Institute Kallam Anji Reddy Campus Dr. Rajendra prasad Centre for Ophthalmic Sciences All India Institute of Medical Sciences

AIMTo assess the anatomical and visual outcome of idiopathic macular holes greater than 1000 µm using the inverted internal limiting membrane flap *** retrospective case series included 5 eyes of 5 patients with idiopathic macular hole with base diameter greater than 1000 µm who underwent inverted internal limiting membrane flap technique along with standard 23G pars plans vitrectomy with posterior hyaloid detachment and fluid gas exchange with 12%-14% perfluoropropane (C3F8). Preoperative and postoperative visual acuity and spectral domain optical coherence tomography images were evaluated. The main outcome measures were visual outcome and macular hole *** age was 63.2±8.4y with all 5 subjects being females. Mean duration of symptoms was 11±14mo with a mean postoperative follow up of 13.2±13mo. The mean base diameter of the macular holes was 1420±84.8 µm (1280-1480 µm). Type 1 closure was achieved in four out of five patients, while one patient had type 2 closure using the inverted internal limiting membrane (ILM) flap technique. Median baseline BCVA was 0.79 logMAR (Snellen’s equivalent 20/120) and median final BCVA 0.6 logMAR (Snellen’s equivalent 20/80) with mean visual improvement of approximately three lines improvement. No complications related to surgical procedure were *** inverted internal limiting membrane flap technique may be promising for very large macular holes with high rate of macular closure and good visual outcome.

关键词： inverted internal limiting membrane flap technique vitrectomy macular hole

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

Strain Limit of Extra Galvannealed Interstitial-Free and Bake Hardened Steel Sheets Under Different Stress Conditions

引用

Journal of Iron and Steel Research(International) 2008年第5期15卷 56-60页

作者： R Narayanasamy N L Parthasarathi R Ravindran C Sathiya narayanan Department of Production Engineering National Institute of TechnologyTiruchirappalli 620015TamilnaduIndia

The formability of bake hardened steel （thickness 0.82 mm）, and the extra galvannealed IF steel （thickness 0.82 mm） have been studied. The suitability of the above steels for forming applications has been critically examined. The microstructure, tensile properties, and formability parameters of the above sheet metals were determined. The manufacturing process of the steels and the significance with reference to its formability were studied.

关键词： bake hardened steel extra galvannealed IF steel microstructure forming limit diagram tensile parameter

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

Nanobiocomposite Electrochemical Biosensor Utilizing Synergic Action of Neutral Red Functionalized Carbon Nanotubes

引用

Nano-Micro Letters 2012年第4期4卷 220-227页

作者： D.R.Shobha Jeykumari R.Kalaivani S.Sriman narayanan Department of Chemistry Women’s Christian college Department of Chemistry School of Basic Sciences VELS University Department of Analytical Chemistry School of Chemical Sciences University of Madras Guindy Campus National Centre for Nanoscience and Nanotechnology University of Madras Guindy campus

An amperometric hydrogen peroxide biosensor using a nanobiocomposite based on neutral red modified carbon nanotubes and co-immobilized glucose oxidase and horseradish peroxidase is reported. Modification of the nanobiocomposite electrode with neutral red resulted in a sensitive, low-cost and reliable H_2O_2 sensor. The use of carbon nanotubes, as the conductive part of the composite, facilitated fast electron transfer rates. The biosensor was characterized for the influence of p H, potential and temperature. A remarkable feature of the biosensor is the detection of H_2O_2 at low applied potentials where the noise level and interferences are minimal. The sensor has a fast steady-state measuring time of 10 s with a quick response(2 s). The biosensor showed a linear range from 15 n M to 45 m M of H_2O_2 and a detection limit of 5 n M. Nafion, which is used as a binder, makes the determination free from other electroactive substances. The repeatability, reproducibility,stability and analytical performance of the sensor are very good.

关键词： Multiwalled carbon nanotubes Neutral red Glucose oxidase Horseradish peroxidase Nafion Nanobiocomposite biosensor

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

Metallurgical analysis of a failed maraging steel shear screw used in the band separation system of a satellite launch vehicle

引用

Defence Technology（防务技术） 2016年第5期12卷 380-387页

作者： S.V.S. Narayana MURTY Sushant K. MANWATKAR E Ramesh narayanan Material Characterization Division Materials and Metallurgy Group Vikram Sarabhai Space Centre Trivandrum 695 022 India

Maraging steels have excellent combination of strength and toughness and are extensively used for a variety of aerospace applications. In one such critical application, this steel was used to fabricate shear screws of a stage separation system in a satellite launch vehicle. During assembly preparations, one of the shear screws which connected the separation band and band end block has failed at the first thread. Microstructural analysis revealed that the crack originated from the root of the thread and propagated in an intergranular mode. The failure is attributed to combined effect of stress and corrosion leading to stress corrosion cracking.

关键词： M250 grade maraging steel Shear screw Separation system Mermen band Stress corrosion cracking

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

Matrisomal genes in squamous cell carcinoma of head and neck influence tumor cell motility and response to cetuximab treatment

引用

Cancer Communications 2022年第4期42卷 355-359页

作者： Kah Yee Goh Kah Weng Lau Terence You De Cheng Su Chin Tham Chwee Teck Lim narayanan Gopalakrishna Iyer Su Bin Lim Darren Wan-Teck Lim Division of Medical Oncology National Cancer Centre SingaporeSingapore 169610 Department of Pathology National University HospitalSingapore 119074 A*STAR ProteosInstitute of Molecular and Cell BiologySingapore 138673 Department of Biomedical Engineering Mechanobiology InstituteNational University of SingaporeT-LabSingapore 117411 Institute for Health Innovation and Technology(iHealthtech) National University of SingaporeMD6Singapore 117599 Department of Head and Neck Surgery National Cancer Centre Singapore11 Hospital CrescentSingapore 169610 Office of Academic and Clinical Development Duke-NUS Medical SchoolSingapore 169857 Department of Biochemistry and Molecular Biology Ajou University School of MedicineYeongtong-GuSuwon 16499South Korea

Dear Editor,Head and neck squamous cell carcinoma(HNSCC)is the sixth most common cancer globally[1,2].Despite the improvement in treatment modalities,up to 50%of HNSCC patients still develop recurrent/metastatic(R/M)disease[3],and platinum-based chemotherapy with cetuximab and/or pembrolizumab has become the standard of care[4].However,R/M HNSCC is challenging to treat,the prognosis is poor,and there is an unmet need for new therapeutic targets.

关键词： chemotherapy cetuximab 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

Is routine use of transanastomotic tube justified in the repair of esophageal atresia?

引用

World Journal of Pediatrics 2017年第6期13卷 584-587页

作者： Sarath Kumar narayanan Arun Preeth Vazhiyodan Prathap Somnath Arun Mohanan Department of Pediatric Surgery Institute of Maternal and Child HealthGovernment Medical CollegeKozhikodeKeralaIndia

Background:Transanastomotic feeding tube (TAFT) is commonly used for post-operative enteral nutrition after esophageal atresia (EA)/tracheoesophageal fistula (TEF) *** purpose of this study is to analyze the therapeutic implications of avoiding a TAFT and its impact on the outcomes ***:The medical data of 33 inpatients with EA/TEF type C repair from 2009 to 2014 were retrospectively *** were divided into two groups for comparison based on the usage of TAFT during the repair:TAFT-(without) and TAFT+ (with) groups,without *** groups were compared statistically for post-operative complications and ***:Eighteen neonates were males and 15 females,with an average birth weight of 2.43±0.43 kg and a mean gestational age of 36.15 *** (57.5%) in the TAFT-group and 14 (42A%) were in the TAFF+ *** post-operative complications,need for dilatations,duration of total parenteral nutrition (TPN) and length of hospital stay were similar in both *** incidence of pneumonitis was significantly higher in the TAFT+ ***:By avoiding a TAFT,there is no increase in complication rates nor does it entail a prolonged period of ***,not using a TAFT may have the advantage of reducing incidence of aspiration and consequent pneumonifis.

关键词： esophageal atresia tracheo-esophageal fistula transanastomotic tube

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

Identifying strategic maintenance capacity for accidental damage occurrence in aircraft operations

引用

Journal of Management Analytics 2019年第1期6卷 30-48页

作者： Prasobh narayanan Wim J.C.Verhagen V.S.Viswanath Dhanisetty Delft University of Technology DelftNetherlands

Airline operators face accidental damages on their fleet of aircraft as part of operational *** occurrences are hard to predict;consequently,the approach towards repairing accidental damage is reactive in aircraft maintenance ***,by aggregating occurrence data and predicting future occurrence rates,it is possible to predict future long-term(strategic)demand for maintenance *** this paper,a novel approach for integration of reliability modelling and inventory control is ***,the concept of a base stock policy has been translated to the maintenance slot capacity problem to determine long-term cost-optimal *** has been modelled using a superposed Non-homogeneous Poisson Process(NHPP).A case study has been performed on damage data from a fleet of Boeing 777 *** results prove the feasibility of adopting an integrated approach towards strategic capacity identification,using real-life data to predict future damage occurrence and associated maintenance slot requirements.

关键词： aircraft maintenance strategic capacity identification stochastic process inventory control

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

Pure and Mg-doped self-assembled ZnO nano-particles for the enhanced photocatalytic degradation of 4-chlorophenol

引用

Journal of Environmental Sciences 2013年第10期25卷 2157-2167页

作者： N.Clament Sagaya Selvam S.narayanan L.John Kennedy J.Judith Vijaya Catalysis and Nanomaterials Research Laboratory Department of Chemistry Loyola College Materials Division School of Advanced Sciences Vellore Institute of Technology UniversityChennai Campus

A novel self-assembled pure and Mg doped ZnO nano-particles （NPs） were successfully synthesized by a simple low temperature co-precipitation method. The prepared photocatalysts were characterized by X-ray diffraction, high resolution scanning electron mi- croscopy, high resolution transmission electron microscopy, diffuse reflectance spectroscopy and photoluminescence （PL） spectroscopy. The results indicated that the prepared photocatalysts showed high crystallinity with a uniform size distribution of the NPs. The degradation of cholorphenols is highly mandatory in today＇s scenario as they are affecting the environment adversely. Thus, the photocatalytic degradation of 4-chlorophenol （4-CP）, a potent endocrine disrupting chemical in aqueous medium was investigated by both pure and Mg-doped ZnO NPs under UV-light irradiation in the present study. The influence of the Mg content on the structure, morphology, PL character and photocatalytic activity of ZnO NPs were investigated systematically. Furthermore,the effect of different parameters such as 4-CP concentration, photocatalyst amount, pH and UV-light wavelength on the resulting photocatalytic activity was investigated.

关键词： Mg-doped ZnO nanoparticles photocatalyst photocatalytic degradation 4-chlorophenol

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

Recurrent isochromosome 21 and multiple abnormalities in a patient suspected of having acute myeloid leukemia with eosinophilic differentiation—a rare case from South India

引用

Chinese Journal of Cancer 2012年第1期31卷 45-50页

作者： Sangeetha Vijay Santhi Sarojam Sureshkumar Raveendran Vani Syamala Sreeja Leelakumari Geetha narayanan Sreedharan Hariharan Division of Cancer Research Regional Cancer CentreMedical CollegeThiruvananthapuramKerala 695011India Division of Medical Oncology Regional Cancer CentreMedical CollegeThiruvananthapuramKerala 695011India

Acute myeloid leukemia (AML) is a phenotypically heterogeneous disorder. The M4 subtype of AML is frequently associated with the cytogenetic marker inversion 16 and/or the presence of eosinophilia. Blast crisis is the aggressive phase of the triphasic chronic myeloid leukemia (CML), which is a disease with Philadelphia (Ph) chromosome as the major abnormality. In the present study, we report a 76-year-old patient suspected of having AML with eosinophilic differentiation (AML-M4), which in clinical tests resembles CML blast crisis with multiple chromosomal abnormalities. Isochromosome 21 [i(21)(q10)] was the most recurrent feature noted in metaphases with 46 chromosomes. Ring chromosome, tetraploid endoreduplication, recurrent aneuploid clones with loss of X chromosome, monosomy 17, monosomy 7, and structural variation translocation (9;14) were also observed in this patient. Fluorescent in situ hybridization (FISH) confirmed the absence of Ph chromosome. This report shows how cytogenetic analyses revealed atypical structural aberrations in the M4 subtype of AML.

关键词：慢性粒细胞白血病嗜酸性粒细胞等臂染色体染色体异常髓细胞急性细胞遗传学分析复发

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：