检索结果-南通市图书馆

bioDesign research 2022年第1期2022卷 395-435页

作者： Neeta lohani Mohan b.Singh Prem L.bhalla Plant Molecular.biology and biotechnology Laboratory Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkvilleVIC 3010Australia

It is vital to ramp up crop production dramatically by 2050 due to the increasing global population and demand for ***, with the climate change projections showing that droughts and heatwaves becoming common in much of the globe,there is a severe threat of a sharp decline in crop yields. Thus, developing crop varieties with inbuilt genetic tolerance toenvironmental stresses is urgently needed. Selective breeding based on genetic diversity is not keeping up with the growingdemand for food and feed. However, the emergence of contemporary plant genetic engineering, genome-editing, and syntheticbiology offer precise tools for developing crops that can sustain productivity under stress conditions. Here, we summarize thesystems biology-level understanding of regulatory pathways involved in perception, signalling, and protective processesactivated in response to unfavour.ble environmental conditions. The potential role of noncoding rNAs in the regulation ofabiotic stress responses has also been highlighted. Further, examples of imparting abiotic stress tolerance by geneticengineering are discussed. Additionally, we provide perspectives on the rational design of abiotic stress tolerance throughsynthetic biology and list various bioparts that can be used to design synthetic gene circuits whose stress-protective functionscan be switched on/off in response to environmental cues.

关键词： protective crops precise

Edge Port Excited Metamaterial based Patch Antennas for 5G Application

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications and Network 2021年第3期13卷 111-129页

作者： Pandharinath r. Satarkar rajesh b. lohani Department of Electronics & Telecommunication Goa College of Engineering Goa University Farmagudi Goa India Government of Goa Farmagudi Goa India

Microstrip Patch Antenna is a narrowband antenna fabricated by etching the antenna element pattern in metal trace of elements like copper.bonded to an insulating dielectric substrate with a continuous metal layer on the opposite side of the substrate which forms a ground plane. Electromagnetic Metamaterial is an artificial material that is made up of different types of structural designs on dielectric substrates. In this paper, a broad and elite investigation is being carried out by designing and simulating a single negative metamaterial cell comprising a square split ring resonator. This metamaterial cell depicts negative values of permeability for a specific range of frequencies. These cells show exceptionally great applications in the design of microstrip patch antenna. The substrate of the microstrip patch antenna with a ground plane is loaded with a square split-ring resonator, Conventional and proposed patch antennas are simulated, analyzed, and reported for performance comparison of its parameters. The proposed edge port feed metamaterial based rectangular microstrip patch antenna and Circular patch antenna designed at 26 GHz resonance frequency useful for 5G applications. both antennas are designed on rT Duroid 5880 Substrate with 2.2, dielectric constants. The parameters such as bandwidth, gain and return loss of metamaterial loaded rectangular microstrip patch antenna and Circular patch antenna increases consider.bly compared to conventional antennas. Comparing parameters of both antennas, the performance of the rectangular microstrip patch antenna is found to be better than circular patch antenna.

关键词： Microstrip Substrate rT Duroid FEKO Polarization Electromagnetics Antenna Metamaterial

Analysis of Wide-bandgap Material OPFET UV Detectors for High Dynamic range Imaging and Communication Applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications and Network 2019年第4期11卷 83-117页

作者： Jaya V. Gaitonde rajesh b. lohani Department of Electronics and Telecommunication Engineering Goa Engineering College Goa University Government of Goa Ponda India

The ultraviolet (UV) photoresponses of Wurtzite GaN, ZnO, and 6H-SiC-based Optical Field Effect Transistor (OPFET) detectors are estimated with an in-depth analysis of the same considering the generalized model and the front-illuminated model for high resolution imaging and UV communication applications. The gate materials considered for the proposed study are gold (Au) and Indium-Tin-Oxide (ITO) for GaN, Au for SiC, and Au and silver dioxide (AgO2) for ZnO. The results indicate significant improvement in the Linear Dynamic range (LDr) over the previously investigated GaN OPFET (buried-gate, front-illuminated and generalized) models with Au gate. The generalized model has superior dynamic range than the front-illuminated model. In terms of responsivity, all the models including buried-gate OPFET exhibit high and compar.ble photoresponses. buried-gate devices on the whole, exhibit faster response than the surface gate models except in the AgO2-ZnO generalized OPFET model wherein the switching time is the lowest. The generalized model enables faster switching than the front-illuminated model. The switching times in all the cases are of the order of nanoseconds to picoseconds. The SiC generalized OPFET model shows the highest 3-db bandwidths of 11.88 GHz, 36.2 GHz, and 364 GHz, and modest unity-gain cut-off frequencies of 4.62 GHz, 8.71 GHz, and 5.71 GHz at the optical power densities of 0.575 μW/cm2, 0.575 mW/cm2, and 0.575 W/cm2 respectively. These are in overall, the highest detection-cum-amplifi-cation bandwidths among all the investigated devices. The same device exhibits the highest LDr of 73.3 db. The device performance is superior to most of the other existing detectors along with compar.ble LDr, thus, emerging as a high performance photodetector for imaging and communication applications. All the detectors show consider.bly high detectivities owing to the high responsivity values. The results have been analyzed by the photovoltaic and the photoconductive effec

关键词： UV OPFET GaN SiC ZnO Au ITO AgO2 High Dynamic range Imaging Photon Counting Communication

Effects of moisture content and feed rate on milling characteristics of wild apricot pits (Prunus armeniaca L.)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and biological Engineering 2014年第1期7卷 103-110页

作者： A.E.Kate U.C.lohani N.C.Shahi J.P.Pandey A.Sarkar Khan Chand Department of Post Harvest Process&Food Engineering College of TechnologyG.B.Pant University of Agriculture and TechnologyPantnagarU.S.Nagar(Uttarakhand)-263145India Department of agricultural and biological Engineering South Dakota State UniversityBrookingsSD 57006USA

Milling with decortication of wild apricot pits was done in wild apricot pit decorticator working on the principle of“impact and compression”.The milling characteristics includes decortication efficiency,percentage of husk,percentage of broken kernels and output capacity was evaluated at the different levels of moisture content,i.e.,8%,10%,12%,14%and 16%(w.b.)and feed rates,i.e.,12 g/stroke,14 g/stroke,16 g/stroke,18 g/stroke and 20 g/*** moisture content as well as feed rate significantly(Prtication efficiency,percentage of husk as well as brokens and output *** efficiency was initially increased and then decreased and opposite nature was found for the percentage of *** percentage of broken kernels and output capacity decreases with the increase in moisture content,while output capacity increases with the increase in feed rate and brokens decreases with the increase in feed rate of wild apricot pits.

关键词： wild apricot pit milling characteristics decortication efficiency moisture content husk percentage broken percentage output capacity

采用响应曲面法优化脚踏分级机山杏核现场分级操作(摘选)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

农业工程 2014年第4期4卷 186-188页

作者： A E Kate U C lohani N C Shahi A Sarkar J P Pandey G b Pant农业技术大学采后加工和食品工程学院

分级是山杏核采后加工利用的最初操作步骤。利用响应面分析对踏板式山杏核分级机机械参数和分级操作(以尺寸为标准)进行优化设计。采用3因素(踏板速度、进料速度和含水率)3水平(速度60、70和80 r/min,进料速度275、300和375 kg/h,含水率... 详细信息

分级是山杏核采后加工利用的最初操作步骤。利用响应面分析对踏板式山杏核分级机机械参数和分级操作(以尺寸为标准)进行优化设计。采用3因素(踏板速度、进料速度和含水率)3水平(速度60、70和80 r/min,进料速度275、300和375 kg/h,含水率10.5%、12.5%和14.5%)研究分级效率(%)和分级能力(kg/h)。为得到自变量最优解,对试验数据进行分析。开发了全二阶模型用于预测反应(分级效率和分级能力),并且研究了各个参数及其相互作用。试验结果表明,分级效率和分级能力分别为75.9%~82.4%和270~325 kg/h。在踏板速度75 r/min,进料速度325 kg/h和核含水率14.5%时,分级机可以达到最大分级效率和分级能力。

关键词：分级机响应面分析优化二阶模型