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Effects of slope aspects on forest compositions, comm.nity structures and soil properties in natural temperate forests of Garhwal Himalaya

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Journal of Forestry Research 2010年第3期21卷 331-337,398页

作者： C.m.Sharma n.P.Baduni Sumeet Gairola S.K.Ghildiyal Sarvesh Suyal Departm.nt of Botany Post Box No.51HNB Garhwal University

The present study was undertaken in seven natural forest types of temperate zone （1500 to 3100 m, a.s.l.） of Garhwal Himalaya to understand the effects of slope aspects viz., north-east （nE）, north-west （nW）, south-east （SE） and south-west （SW）, on the forest structure, composition and soil characteristics of each selected forest type. The sample plots in each forest type were laid out by using stratified random approach. The indices i.e., the Importance Value Index, Shannon-Wiener diversity index, Simpson’s concentration of Dom.nance, Simpson diver-sity index, Pielou equitability and margalef species richness index were calculated statistically using standard softwares to elucidate the differ-ences in forest structure and composition of forest types on different slope aspects of the sites. The composite soil samples were taken from each forest stand and the physico-chemical properties of the soil i.e., moisture content （mC）, water holding capacity （WHC）, pH, organic carbon （OC）, phosphorus （P）, potassium （K） and available nitrogen （n） were analyzed. The results show that the higher values of total basal cover （74.4 m2·ha-1 in Quercus semecarpifolia forest）, Concentration of dom.nance （0.85 in Pinus roxburghii forest） and Tree diversity （1.81 in Quercus floribunda forest） in the forests were recorded in the northern aspects. mC （40.8% in Quercus leucotrichophora forest）, WHC （48.9% in Cupressus torulosa forest）, OC （3.8% in Cedrus deodara forest）, P （31.9 kg·ha-1 in Quercus leucotrichophora forest） and n （1.0% in Pinus roxburghii forest） had also higher values in the soils of northern aspects. Consequently the higher productivity of the forests was also noticed on the northern aspects.

关键词： diversity stem density forest composition aspects soil nutrients

Cu(In,Ga)Se_(2)based ultrathin solar cells the pathway from lab rigid to large scale flexible technology

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npj Flexible Electronics 2023年第1期7卷 524-534页

作者： T.S.Lopes J.P.Teixeira m.A.Curado B.R.Ferreira A.J.n.Oliveira J.m.V.Cunha m.m.nteiro A.Violas J.R.S.Barbosa P.C.Sousa I.Çaha J.Borme K.Oliveira J.Ring W.C.Chen Y.Zhou K.Takei E.niemi F.L.Deepak m.Edoff G.Brammertz P.A.Fernandes B.Verm.ng P.m.P.Salomé InL-International Iberian nanotechnology Laboratory Avenida Mestre JoséVeiga4715-330 BragaPortugal Hasselt University imo-imomecMartelarenlaan 423500 HasseltBelgium Imec imo-imomecThor Park 83203600 GenkBelgium EnergyVille imo-imecThorPark 83203600 GenkBelgium CFisUC Department of PhysicsUniversity of CoimbraP-3004-516 CoimbraPortugal Departam.nto de Física Universidade de AveiroCampus Universitário de Santiago3810-193 AveiroPortugal i3n Universidade de AveiroCampus Universitário de Santiago3810-193 AveiroPortugal Obducat AB Medicon Village22363 LundSweden Ångström Laboratory Department of Engineering SciencesUppsala University75121 UppsalaSweden midsummer AB Elektronikhõjden 6SE-17543 JãrfãllaSweden CIETI Departamento de FísicaInstituto Superior de Engenharia do PortoInstituto Politécnico do Porto4200-072 PortoPortugal

The incorporation of interface passivation structures in ultrathin Cu(In,Ga)Se_(2)based solar cells is *** fabrication used an industry scalable lithography technique—nanoimprint lithography(nIL)—for a 15×15 cm^(2)dielectric layer *** with a nIL nanopatterned dielectric layer are benchmarked against electron-beam lithography(EBL)patterning,using rigid *** nIL patterned device shows similar perform.nce to the EBL patterned *** impact of the lithographic processes in the rigid solar cells’perform.nce were evaluated via X-ray Photoelectron Spectroscopy and through a Solar Cell Capacitance *** device on stainless-steel showed a slightly lower perform.nce than the rigid approach,due to additional challenges of processing steel substrates,even though scanning transmission electron microscopy did not show clear evidence of impurity ***,time-resolved photolum.nescence results strongly suggested elem.ntal diffusion from the flexible ***,bending tests on the stainless-steel device dem.nstrated the mechanical stability of the CIGS-based device.

关键词： lithography ultrathin rigid

Factors affecting single-step transepithelial photorefractive keratectomy outcome in the treatm.nt of mild,moderate,and high myopia:a cohort study

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International Journal of Ophthalmology(English edition) 2022年第5期15卷 786-792页

作者： m.nsour m.Al-mohaimeed Departm.nt of Ophthalmology College of MedicineQassim UniversityQassimBuraidah 51452Saudi Arabia

AIm:To investigate the effect of preoperative factors on visual acuity,higher-order aberrations(HOAs),and index of success for spherical change(***)after transepithelial photorefractive keratectomy(t-PRK)for treating different grades of ***:This was a retrospective one-armed cohort study where patients with high,moderate,or mild myopia treated with single-step t-PRK using Amaris 500 Hz excimer laser were evaluated for visual acuity,refractive status,corneal topography,HOAs,***,and mean efficiency and safety index before and 6 mo after ***:A total of 154 eyes of 77 patients with mild(n=59),moderate(n=83),and high(n=12)myopia were *** efficiency and safety indices for vision recovery by single-step t-PRK were 98%and 100%,*** achieved spherical equivalent(SE)was within 1 diopter(D)in 151(98%)*** median of the *** was 1.18[interquartile range(IQR)1.0,1.4].The change in *** was significantly correlated with age(P=0.007),6.5 mm ablation zone(m.nn-Whitney U test,Pnd mild and moderate grade of myopia(Kruskal–Wallis test,Pn,spherical aberration,and aberration coefficient types of HOA increased significantly(Wilcoxon test,Pmo *** was a significant correlation between spherical aberration and aberration coefficient HOAs by myopia grades(PnCLUSIOn:Single-step t-PRK has promising short-term outcomes for refractive corrections and vision improvem.nt to treat all three grades of myopia.

关键词： myopia refractive surgery trans-epithelial photorefractive keratectomy higher-order aberrations

Ag/PEPC/niPc/ZnO/Ag thin film capacitive and resistive humidity sensors

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Journal of Semiconductors 2010年第5期31卷 45-50页

作者： Kh.S.Karimov Kuan Yew Cheong m.Saleem Imran murtaza m.Farooq Ahmad Fauzi mohd noor GIK Institute of Engineering Sciences and Technology TopiDistrict SwabiNWFP 23640Pakistan Physical Technical Institute of Academy of Sciences Rudaki Ave 33Dushanbe734025Tajikistan School of materials & m.neral Resources Engineering Engineering CampusUniversiti Sains Malaysia14300 Nibong TebalPenangMalaysia

A thin film of blended poly-n-epoxypropylcarbazole（PEPC）（25 wt.%）,nickel phthalocyanine（niPc）（50 wt.%） and ZnO nano-powder（25 wt.%） in benzene（5 wt.%） was spin-coated on a glass substrate with silver electrodes to produce a surface-type Ag/PEPC/niPc/ZnO/Ag capacitive and resistive *** with two different PEPC/niPc/ZnO film thicknesses（330 and 400 nm） were fabricated and *** effects of humidity on capacitance and resistance of the Ag/PEPC/niPc/ZnO/Ag sensors were investigated at two frequencies of the applied voltage：120 Hz and 1 *** was observed that at 120 Hz under humidity of up to 95%RH the capacitance of the sensors increased by 540 times and resistance decreased by 450 times with respect to humidity conditions of 50%RH. It was found that the sensor with a thinner semiconducting film（330 nm） was more sensitive than the sensor with a thicker film（400 nm）.The sensitivity was improved when the sensor was used at a lower frequency as compared with a high *** is assumed that the humidity response of the sensors is associated with absorption of water vapors and doping of water molecules in the semiconductor blend *** had been proven by simulation of the capacitance-humidity relationship.

关键词： organic semiconductor poly-n-epoxypropylcarbazole nickel phthalocyanine nano-powder ZnO sensor

Recent advances in extraction of antioxidants from plant by-products processing industries

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Food Quality and Safety 2017年第1期1卷 61-81页

作者： m.Selvamuthukumaran John Shi Departm.nt of Food Science and Post Harvest Technology Institute of TechnologyHaramaya UniversityPO Box 138Dire DawaEthiopia Guelph Research and Developm.nt Center Agriculture and Agri-Food Canada93 Stone Road WestGuelphOntario N1G 5C9Canada

The by-products obtained from plant processing industries are the cheap source of bioactive compounds especially *** of bioactive compounds can be obtained by using conventional and non-conventional *** efficiency of any conventional method mainly depends on the choice of *** major challenges of conventional extraction are longer extraction time,requirem.nt of costly and high purity solvent,evaporation of the huge amount of solvent,low extraction selectivity,and thermal decomposition of thermolabile *** overcome these limitations of conventional extraction methods,new and promising extraction techniques are *** techniques are referred as non-conventional extraction ***,in this review,some of the most promising techniques such as ultrasoundassisted extraction,pulsed electric field extraction,enzyme-assisted extraction,microwave-assisted extraction,pressurized liquid extraction,supercritical fluid extraction,pressurized low-polarity water extraction,and molecular distillation were *** process systems along with industrial applications for non-conventional method of antioxidants extraction were discussed,and the comparative efficacies of different extraction methods were *** conventional technologies by non-conventional ones for the extraction of valuable compounds from plant by-products processing industries has several advantages,which includes reduction of the processing time,energy consumption,and the uses of harmful and expensive solvents and increase in the extraction *** and developm.nt of hybrid methods should be investigated,while considering plant material characteristics and choice of compounds in *** choice of standard methods also influences the measurem.nt of extraction *** increasing economic significance of bioactive compounds and commodities rich in these bioactive compounds may lead to find out more sophi

关键词： Antioxidants Extraction non-conventional methods Plant by-products Pulsed electric field extraction Ultrasoundassisted extraction

Genetic Comparison am.ng Rhynchophorus ferrugineus and Four Rhynchophorus Species

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Journal of Agricultural Science and Technology(B) 2011年第4期1卷 610-615页

作者： R. A. A. m. EI-mergawy A. m. Al Ajlan n. Abdalla m. I. nasr J. F. Silvain RD UR 072 Laboratory Evolution Genomes and Speciation UPR 9034 CNRS 91198 Gifsur-Yvette France Departm.nt of molecular Biology Genetic Engineering and Biotechnology Research institute （GEBRI） Sadat City MinoufiaUniversity Egypt Departm.nt of Arid Land Agriculture College of Agriculture ＆ Food Sciences King Faisal University P.O. Box 55009 Hofuf31982 Kingdom of Saudi Arabia Departm.nt of Genetics Faculty of Agriculture Cairo University Egypt Universitd Paris-Sud 11 Orsay Cedex 91405 France

Genetic comparison between Rhynchophorus ferrugineus （Coleoptera： Curculionidae： Rhynchophorinae） and other four Rhynchophorus spp. such as R. bilineatus, R. phoenicis, R. cruentatus and R. palmarum was investigated using partial sequences of Cytochrome c oxidase subunit I （COl） mitochondrial gene. The number ofpolymorphic sites ranged from 79 to 102 while the genetic distances ranged from 0.058 to 0.095. The number of polymorphic sites, genetic distances and phylogenetic relationships am.ng R. ferrugineus and the other four tested species revealed that *** was more closely related to R. bilineatus while it was distantly related to R. palmarum. It is possible to rank the five tested species as follows： ***, R. bilineatus, R. phoenicis, R. cruentatus and R. palmarum. The result of this study is the first step of the revision of the uncertain taxonomic status and phylogenetic relationships am.ng the Rhynchophorus genus. Further analysis should be performed using other Rhynchophorus species as well as other molecular markers.

关键词： Rhynchophorus spp. R. ferrugineus red palm weevil phylogeny.

Synthesis, spectral characterization, thermal and biological studies of lanthanide(Ⅲ) complexes of oxyphenbutazone

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Journal of Rare Earths 2014年第1期32卷 43-51页

作者： P.S.Binil m.R.Anoop K.R.Jisha S.Suma m.R.Sudarsanakumar Departm.nt of Chemistry S.N.College Departm.nt of Chemistry M.G.College

Lanthanide（III） complexes of 4-butyl-1-（4-hydroxyphenyl）-2-phenyl-3,5-pyrazolidinedione （OPB） were prepared by ho-mogeneous precipitation. The solid complexes were characterized by elem.ntal analysis, magnetic susceptibility data, molar conduc-tivity measurem.nts and IR, UV-Vis, mass, 1H nmR and 13C nmR spectral methods. The thermal decomposition of the complexes under static air atmosphere was investigated by simultaneous TG/DTG at a heating rate of 10 °C/m.n. The final decomposition prod-ucts were found to be metal oxides. The spectroscopic data suggested that OPB acted as a bidentate, m.no-ionic ligand coordinating through two carbonyl oxygens of the pyrazolidinedione ring. The kinetic and thermodynamic parameters such as activation energy, pre-exponential factor and entropy of activation for each step of the decomposition reactions were evaluated using Coats-Redfern and macCallum-Tanner equations. The negative entropy values of the complexes indicated that the activated complexes had a more or-dered structure than the reactant and that the reactions were slower than normal. Investigations of antimicrobial activity of the com-pounds were carried out by the disk diffusion technique.

关键词： oxyphenbutazone lanthanide(III) complexes thermal study antimicrobial activity rare earths

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SF6和真空中高压绝缘及电弧开断的进展

SF6和真空中高压绝缘及电弧开断的进展

Estimation of Low nutrients in Tomato Crops Through the Analysis of Leaf Images Using machine Learning

作者： V.n.·墨尔勒(V.n. malller) m.S.·奈杜(m.S. naidu)

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Journal of Artificial Intelligence and Technology 2021年第2期1卷 131-137页

作者： Hiram Ponce Claudio Cevallos Ricardo Espinosa Sebastián Gutiérrez Universidad Panamericana Facultad de IngenieríaAugusto Rodin 498Ciudad de México 03920México Universidad Panamericana Facultad de IngenieríaJosemaría Escriváde Balaguer 101Aguascalientes 20290México

Tomato crops are considered the most important agricultural products ***,the quality of tomatoes depends mainly on the nutrient *** inspection is made by farmers to anticipate the nutrient deficiency of the ***,precision agriculture has explored opportunities to automate nutrient level *** work has dem.nstrated that a convolutional neural network is able to estimate low nutrients in tomato plants using images of their ***,the perform.nce of the convolutional neural network was not ***,this work proposes a novel convolutional neural network-based classifier,namely,Cnn+AHn,for estimating low nutrients in tomato crops using an image of the tomato *** Cnn+AHn incorporates a set of convolutional layers as the feature extraction part,and a supervised learning method called artificial hydrocarbon network as the dense *** combinations of the architecture of Cnn+AHn were *** results showed that our best Cnn+AHn classifier is able to estimate low nutrients in tomato plants with an accuracy of 95.57%and F1-score of 95.75%,outperform.ng the literature.

关键词： agriculture image processing deep learning computer vision color analysis