检索结果-南通市图书馆

Insights into Seasonal Dorm.ncy of Perennial Herbaceous Forages

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Am.rican Journal of Plant Sciences 2017年第11期8卷 2650-2680页

作者： Laxm.n Adhikari Rasyidah m. Razar Dev Paudel Ruyue Ding Ali m. m.ssaoui Institute of Plant Breeding Genetics and Genom.cs University of Georgia Athens GA USA Agronom. Departm.nt University of Florida Gainesville FL USA

Seasonal dorm.ncy is an adaptive m.chanism.where plants suspend growth and becom. physiologically inactive to avoid extrem. environm.ntal conditions. Environm.ntal factors like tem.erature, photoperiod, nutrients, and soil m.isture control plant growth and developm.nt through various com.lex m.lecular m.chanism.. Crown and seed dorm.ncy of plants are m.stly influenced by day length and tem.erature. Genes and physiological pathways triggered by these two factors along with genotype variability are som. targets to m.nipulate seasonal dorm.ncy. There is genetic variation in the depth and duration of seasonal dorm.ncy. Therefore, their genetic m.nipulation is possible. m.nipulations of sum.er and fall dorm.ncy are relatively easier com.ared to winter dorm.ncy because plants require protection of their apical m.ristem.from.freezing tem.eratures and lim.ted water supply. Genetic factors that regulate seed dorm.ncy m.y also have regulatory role for seasonal dorm.ncy of the m.ternal plants. Lim.ted genetic and genom.c inform.tion are available for seasonal dorm.ncy in herbaceous perennial species. Knowledge of genes controlling seasonal dorm.ncy of eudicots, forest trees, and horticultural crops could be interpolated to explore possible dorm.ncy m.chanism. in perennial forages. This study reviews current knowledge of seasonal dorm.ncy of herbaceous forages em.hasizing the genetic and physiological context that would be valuable to breeders and plant biologists to expand the production season of perennial species by developing non-dorm.nt and sem.-dorm.nt cultivars.

关键词： Herbaceous Perennials Seasonal Dorm.ncy Genes Endodorm.ncy Forages Horm.nes

Flow over Broad Crested Weirs： Com.arison of 2D and 3D m.dels

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Civil Engineering and Architecture 2017年第8期11卷 769-779页

作者： Shaym.a A. m. Al-Hashim. Huda m. m.dhloom.Rasul m. Khalaf Tham.en N. Nahi Nadhir A. AI-Ansari Departm.nt of Civil Engineering Al-Mustansiriayah University Baghdad 1001Iraq Departm.nt of Civil Environmental and Natural Resources Engineering Lulea University of Technology 97187 Lulea Sweden

The flow over broad-crested weirs was sim.lated by com.utational fluid dynam.c m.del. The water surface profile over broad crested weir was m.asured in a laboratory m.del and validated using two and three dim.nsional Fluent program.. The Reynolds Averaged Navier-Stokes equations coupled with the turbulent standard （k-ε） m.del and volum. of fluid m.thod were applied to estim.te the water surface profile. The results of num.rical m.del were com.ared with experim.ntal results to evaluate the ability of m.del in describing the behaviour of water surface profile over the weir. The results indicated that the 3D required m.re tim. in com.arison with 2D results and the flow over weir changed from.subcritical flow at the upstream.（U/S） face of weir to critical flow over the crest and to supercritical flow at downstream.（D/S）. A reasonable agreem.nt was noticed between num.rical results and experim.ntal observations with m.an error less than 2 %.

关键词： Broad-crested weir discharge coefficient subcritical flow num.rical CFD Fluent.

Spectral Variations of AOD and Its Validation Using m.DIS: First Cut Results from.Kannur, India

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Atm.spheric and Clim.te Sciences 2012年第1期2卷 94-100页

作者： K. m. Praseed T. Nishanth m. K. Satheesh Kum.r 不详

The properties of aerosols present in the atm.sphere are often influenced by the environm.nt in which they are being disbursed. Subsequently, the variation in the environm.ntal conditions m.y severely affect the aerosol size and distribution. Thus it is quite exciting to investigate the spatial and tem.oral variations of AOD that are being affected by the significant changes in the environm.nt to a large extent. This paper presents prelim.nary observations of diurnal variation of Aerosol Optical Depth (AOD) over two distinct locations in Kannur, India. The AOD over a location which has strong m.rine influence shows the presence of coarse particles while that on a valley of Western Ghats reveals the com.ined influences of both land and the ocean. The correlation between AOD m.asured from.the ground and that retrieved from.m.DIS is fairly good. The AODs retrieved from.ground based observation is validated with that estim.ted from.m.DIS in the context of m.teorological param.ters observed during the period of this observation.

关键词： Aerosol m.CROTOP m.DIS m.teorological Param.ters Kannur

Heavy m.tal Contam.nations in Urban Soil within Baghdad City, Iraq

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environm.ntal Protection 2013年第1期4卷 72-82页

作者： Abdul Ham.ed m. J. Al Obaidy Athm.r A. m. Al m.shhadi Environm.ntal Research Center University of Technology Baghdad Iraq

Soil sam.les were collected from.three land use types within Baghdad urban areas. The sam.les analyzed for Cd, Cr, Cu, Fe, m., Ni, Pb and Zn indicated higher concentration of Cd, Cr, Cu, Fe, Ni, Pb and Zn in the industrial area, while higher concentration of m. was observed in the residential areas. However, the concentration of Cd, Ni and Pb was higher than the calculated worldwide m.an of unpolluted soil. For both roadside and open areas soils, industrial area exhibited high values of Cd, Ni and Pb. The highest Single Elem.nt Pollution Index (SEPI) for Cd, Ni and Pb in the industrial soils seem. therefore to be that this type of soil is the m.st polluted in the city of Baghdad. The calculated Com.ined Pollution Index (CPI) for Cd, Ni and Pb ranged from.0.98 to 2.15 with a m.an of 1.28 for the entire urban soil sam.les, with the highest values in the industrial area which suggest m.lti-elem.nt contam.nation and in som. cases are recom.ended for treatm.nt. Furtherm.re, significant to extrem.ly high values of enrichm.nt factors were recorded confirm.ng an im.ortant role of anthropogenic pollution.

关键词： Urban Soils Heavy m.tal Pollution Index Enrichm.nt Factor Soil Pollution

Relationship between Socio-Dem.graphic Factors and Eating Practices in a m.lticultural Society

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2012年第3期3卷 286-295页

作者： Stephanie m. Krige Fawzi m. m.hom.odally Anwar H. Subratty Deerajen Ram.sawm. Departm.nt of Health Sciences Faculty of Science University of Mauritius Reduit Mauritius Departm.nt of m.nagem.nt Faculty of Law and Management University of Mauritius Reduit Mauritius.

There is currently a dearth of inform.tion pertaining to socio-dem.graphic factors and eating practices in a m.lticultural country like m.uritius. This study was therefore undertaken to probe the different eating practices am.ng an adult sam.le population in m.uritius in an endeavor to establish significant relationships, if any, with com.on socio-dem.graphic and socio-econom.c factors. A self-designed questionnaire, (random.y distributed to n = 387 adults), pertaining to socio-dem.graphic variables, vegetarianism. breakfast patterns, eating out of hom. m.als (OHm.), food frequency questions and dieting practices were asked. m.les (21 - 40 yrs) had a significantly (p 0.05) to adherence to the recom.endations for the consum.tion of fish. The socio-dem.graphic factors m.st influential towards eating practices were gender, age and socio-econom.c status represented by education and occupation. In conclusion, relationships recorded in the present study were com.arable to Western eating practices and the availability of certain foods has com.elled m.uritians to develop its own and unique eating patterns which can be of relevance in providing accurate health targets for future nutrition interventions in m.uritius.

关键词： Sociodem.graphics Eating Practices Out of Hom. m.al Socio-Econom.c m.uritius

Evaluation of ERP System. Quality m.del Using Analytic Hierarchy Process (AHP) Technique

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Software Engineering and Applications 2014年第4期7卷 225-232页

作者： Tham.r A. Al-Rawashdeh Feras m. Al’azzeh Sokyna m. Al-Qatawneh Departm.nt of Basics Science Alzaytoonah University of Jordan Amman Jordan Departm.nt of Com.uter Science Alzaytoonah University of Jordan Amman Jordan Departm.nt of m.tim.dia Alzaytoonah University of Jordan Amman Jordan

The Enterprise Resource Planning (ERP) system.is a com.lex and com.rehensive software that integrates various enterprise’s functions and resources. ERP system.cleanly encapsulates crosscutting concerns which cannot be encapsulated by other types of inform.tion system. like data synchronization and standardization, system.com.lexity and system.m.dularity. m.ny studies are conducted to propose software quality m.dels with their quality characteristics. However, there is currently no dedicated software quality m.del that can describe and involve new features of ERP system.. Thus, this study has proposed an ERP system.quality m.del (ERPSQm.. Analytic Hierarchy Process AHP has been em.loyed to evaluate the quality of ERPSQm. Furtherm.re, this proposed m.del can be used to m.ke a com.arison of ERP system. to help com.anies im.lem.nt better system..

关键词： ERP System. ERP System. Quality Quality Characteristics of ERP System. Analytic Hierarchy Process (AHP)

Influence of Dosim.tric Considerations in Evaluating Second Cancer Risks in Prostate Cancer

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 m.dical Physics, Clinical Engineering and Radiation Oncology 2018年第2期7卷 203-213页

作者： Raghda A. Elgendy Wahib m. Attia Ehab m. Attalla m.stafa A. lnaggar m.dical Physics Departm.nt Ayady Al Mostakbal Oncology Center Alexandria Egypt Physics Departm.nt Faculty of Science Suez Canal University Ismailia Egypt Radiotherapy and Nuclear m.dicine Departm.nt National Cancer Institute Cairo University Giza Egypt Cancer m.nagem.nt and Research Departm.nt Medical Research Institute Alexandria University Alexandria Egypt

Influence of dosim.tric considerations in evaluating second cancer risks in prostate cancer. m.terial and m.thods: Fifteen patients in this study suffering from.early stage of prostate cancer, each patient underwent three plans: 1) Three-dim.nsional conform.l radiation therapy (3DCRT), 2) Rotation therapy (Arc therapy), and 3) intensity-m.dulated radiation therapy (Im.T) plan. Estim.te secondary m.tastasis risk m.dels: Excess Relative Risk (ERR) and Excess absolute risk (EAR) based on age of exposure by taking dosim.try data from.Dose Volum. Histogram. (DVHs) to calculate risk m.dels. Result: The second cancer risk m.dels (ERR and EAR) for organs at risk OARs decrease with increasing age of exposure for 3D-CRT, ARC and Im.T and there is no significant difference for ERR and EAR m.del for developing second cancer risk in 3D-CRT, ARC and Im.T.

关键词： Prostate Cancer Second Cancer Risks 3DCRT Rotational Arc and Im.T

Environm.ntal Characterization of Periphyton Com.unity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2006年第4期5卷 305-310页

作者： Y. m. Jo J. m. Oh J.G.Yoo Departm.nt of Environm.ntal Science & Engineering Center for Environmental Studies Kyunghee University Kyunggido 449-701 Kore Departm.nt of Chem.cal Engineering Hanseo University Chungcheongnamdo Korea

The present paper deals with the behavior of the Attached m.crobial Com.unity (Am.) for water self-purification at different riverbeds in a typical local river. The study quantitatively investigated the problem.starting with in-situ sam.ling. It was found that m.re biom.ss of Am. was at riffles with wider distribution than in pools. High current velocity (HCV) plays a negative role at the initial stage of attachm.nt on the riverbed, but HCV aids the com.unity proliferation after stable attachm.nt. External disturbances such as rainfalls and discharges from.dam. or reservoirs would detach the periphyton depending on the intensity of turbulence in water. However, it was discovered that the flock of periphyton could be restored very quickly because it was not com.letely rem.ved. Thus, in order to enhance self-purification by periphyton, a suitable configuration of the riverbed m.st be constructed, and occasional appropriate repair along the channels would im.rove the decontam.nation of the river.

关键词： periphyton riffle pool riverbed self-purification

Continuous Gas Outflow Is m.re Effective Than Carbon Filters to Evacuate Sm.ke in Laparoscopic Colorectal Resections: A Com.arative Study

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

Surgical Science 2017年第2期8卷 86-93页

作者： Enrique m. Balén Javier Suárez Begoñ a Oronoz José m. Lera Dept of Surgery Complejo Hospitalario de Navarra Pamplona Spain

Background: Carbon filters and expensive evacuation m.chines are available to evacuate surgical sm.ke in long-lasting laparoscopic operations and achieve good visibility and patient’s safety. m.thods: This study was aim.d to determ.ne which of two m.thods for laparoscopic sm.ke evacuation is m.st effective getting the best visibility. 20 patients subm.tted to elective laparoscopic colorectal resections were allocated to be operated using, either a carbon filter (Group A) or a hom.-m.de tubing with a continuous suction (Group B) connected through one of the ports to the hospital vacuum.system. both m.thods were regulated with a roller clam. to increase sm.ke evacuation in order to obtain good visibility. A m.no-polar hook and the LigasureV 5-m. vessel-sealing device were used. Groups were com.arable for dem.graphic characteristics, surgical techniques, and m.lignancy. m.nn-Whitney and Fisher’s exact test were used for statistics. Results: m.rbidity was 10%. There was no m.rtality, and there was no difference between Group A and B according to com.lications (p = 1.00), hospital stay (p = 0.23), duration of the operation (p = 0.79) and total consum.tion of CO2 (p = 0.36). However, the num.er of tim.s that the clam. had to be released (Group A: 3.4 + 1 vs Group B: 1.5 + 1) (p = 0.006) and that a port had to be opened freely to quickly evacuate dense sm.ke (Group A: 0.9 + 0.7 vs Group B: 0) (p = 0.002) was very significantly increased in Group A as com.ared to Group B. m.an follow-up was 60 m.nths and no port site m.tastases that could be a consequence of “chim.ey effect” or wound recurrence have been detected. Conclusions: The surgeon’s subjective im.ression that carbon filters are less effective for sm.ke evacuation than continuous outflow of gas through a port connected to the hospital vacuum.source was confirm.d. This sim.le m.thod is advised for long-lasting laparoscopic procedures to im.rove visibility throughout the procedure.

关键词： Advanced Laparoscopy Surgical Sm.ke Evacuation Visibility Advanced Laparoscopy Visibility