检索结果-南通市图书馆

Building a healthy China by enhancing physical activity:Priorities,challenges,and strategies

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 Sport and Health Science 2017年第1期6卷 125-126页

作者： sa Wu Yufeng Luo Xue Qiu Mingxiao Bao Sport Social Science Research Center China Institute of Sport ScienceBeijing 100061China

Dear editor,In 2016,several landmark government initiatives were launched in an effort to build a more healthy *** March,the National People’s Congress of China adopted the 13th FiveYear Plan,which sets out new objectives,principles,and targets for 2016–2020,1including action plans for enhancing environmental protection and green growth,promoting individual

关键词： Building a healthy China by enhancing physical activity:Priorities and strategies challenges PA

Automated tree detection and crown delineation using airborne laser scanner data in heterogeneous East-Central Europe forest with different species mix

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2017年第5期28卷 1049-1059页

作者： Róbert Smreek Ivan sakov Zuzana Michnová Ján Tuek Department of Forest Management and Geodesy Technical University in Zvolen Department of Forest Policy Economics and Forest ManagementNational Forest Centre-Forest Research Institute Zvolen

Identifying tree locations is a basic step in the derivation of other tree parameters using remote sensing techniques, particularly when using airborne laser scanning. There are several techniques for identifying tree positions. In this paper, we present a raster-based method for determining tree position and delineating crown coverage. We collected data from nine research plots that supported different mixes of species. We applied a raster-based method to raster layers with six different spatial resolutions and used terrestrial measurement data as reference data. Tree identification at a spatial resolution of 1.5 m was demonstrated to be the most accurate, with an average identification ratio (ir) of 95% and average detection ratio of 68% being observed. At a higher spatial resolution of 0.5 m, ir was overestimated by more than 600%. At a lower spatial resolution of 3 m, ir was underestimated at less than 44% of terrestrial measurements. The inventory process was timed to enable evaluation of the time efficiency of automatic methods.

关键词： Airborne laser scanning East-Central Europe Individual tree Mixed forest Tree crown delineation

Influence of a-tocopherol on nickel induced alteration of serum lipid profile in male albino rats

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2008年第1期1卷 14-18页

作者： Gupta AD Dhundasi sa Dhara PC Das KK Department of Physiology Al-Ameen Medical CollegeBijapur 586108 KarnatakaIndia Department of Human Physiology & Community Health Vidyasagar UniversityMidnapur(West) 721102West BengalIndia

We studied the effect of the simultaneous treatment withα-tocopherol(100 mg / kg;im) and nickel sulfate (20 mg/kg,ip) on nickel-induced changes in serum lipid ***-treated rats showed a significant increase in serum LDL cholesterol,total cholesterol,triglycerides,and a significant decrease in serum HDL cholesterol. Simultaneous administration ofα-tocopherol with nickel sulfate improved LDL-cholesterol and HDLcholesterol level when compared with rats receiving nickel sulfate *** results indicate thatα-tocopherol is beneficial in preventing nickel-induced lipid profile alterations.

关键词： nickel sulfate α-tocopherol serum lipid profile

Myxomycetes in a forest affected by great cormorant colony:a case study in Western Lithuania

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fungal Diversity 2013年第2期59卷 131-146页

作者： Gražina Adamonytė Reda iršėnaitė Jurga Motiejūnaitė Ričardas Taraškevičius DalytėMatulevičiūtė Institute of Botany Nature Research CentreŽaliųjųEžerųStr.49LT-08406 VilniusLithuania Institute of Geology and Geography Nature Research CentreŠevčenkos Str.13LT-03223 VilniusLithuania

Myxomycete distribution patterns were investigated in a colony of great cormorants(Phalacrocorax carbo sinensis)established in a pine forest in the Curonian Spit,western *** impact on the forest resulted both in vegetation changes and altered types and characteristics of myxomycete *** lowest myxomycete species richness was found in the most active part of the colony with the newest and most numerous *** myxomycete assemblages of the active part of the colony also showed the biggest differences from the reference zone(oligotrophic pine forest).The general abundance of myxomycetes in the territory of the colony was higher due to the presence of the species that are not characteristic of pine *** most abundant species in the territory were Badhamia apiculospora and Perichaena *** with other facultative coprophiles,such rare species as Comatricha mirabilis and Arcyria leiocarpa were found sporulating in the *** Bray-Curtis ordination revealed a tripole gradient of myxomycete distribution in the *** was hypothesized that the first continuum may reflect myxomycete assemblage transition from hypertrophic to oligotrophic habitat;the second continuum may reflect myxomycete assemblage distribution from habitats with limited diversity of available substrata,extreme levels of nutrients and high pH to habitats with high diversity of available substrata,moderate to high levels of nutrients and pH,and the third continuum may reflect myxomycete assemblage distribution from habitats with lower diversity of available substrata,low levels of nutrients and pH to habitats with high diversity of available substrata,moderate to high levels of nutrients and pH.

关键词： Bird colony Hypertrophication Mycetozoans Slime moulds

Laser irradiation effects and its possible mechanisms of action on spermatozoa functions in domestic animals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian pacific Journal of Reproduction 2017年第3期6卷 97-103页

作者： Lone sa Mohanty TK Kumaresan A Bhakat M Artificial Breeding Research Centre ICAR-National Dairy Research InstituteKarnal132001HaryanaIndia Livestock Research Centre ICAR-National Dairy Research InstituteKarnal132001HaryanaIndia

This article presents a review pertains the laser irradiation effects and its possible mechanisms of action on spermatozoa functions in domestic animals. To improve artificial insemination, laser is sensitive and cost effective technique, when compared to other conventional methods. Laser may have both positive and negative effects on spermatozoa functions. Since the effects of light are mediated by reactive oxygen species, and the levels of these reactive oxygen species following irradiating spermatozoa with laser may be responsible for determining the effects of laser on sperm. Dose of laser may be regarded as of great significance and this dosage of laser may be responsible for determining its effects on spermatozoa. Optimum dosage of laser for improving seminal attributes may vary among various species and this need to be standardized in each of them. The beneficial effects include improving sperm livability, acrosomal integrity, hypo-osmotic swelling response, mitochondrial function and computer-aided sperm analysis parameters. The increase in cytochrome c oxidase activity, ATP levels and mitochondrial membrane potential, in laser irradiated cells may be responsible for enhanced sperm quality parameters. Improving fertility with laser irradiated spermatozoa has been reported in few species like boar and need to be elaborated in other species. In conclusion laser may be regarded as an easy, cheap and time saving technology for improving artificial insemination;in addition, laser may have various potential applications in the field of reproductive biotechnology as well as in livestock farms and veterinary polyclinics.

关键词： Laser irradiation Spermatozoa Function Mechanism

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

　

中国有色金属学会会刊：英文版 2001年第6期11卷 942-945页

作者： Yuang, DS Huang, KS Liu, GK Tong, YX sa, LC Zhongshan Univ Sch Chem & Chem Engn Guangzhou 510275 Peoples R China

Potentiostatic and pulse electrolysis techniques were used to prepare La-Co-Fe alloy films using ethylenediamine (EN) as complexant. Surfaces of alloy films obtained by these two techniques are smooth, adhesive, compact and metallic luster. The contents of La in alloy films obtained by potentiostatic electrolysis technique are in the range of 13.23%～47.67%. The contents of La in alloy films deposited by pulse electrolysis technique are in the range of 10.67%～16.29%.

关键词： ethylenediamine lanthanum codeposition dimethylsulfoxide La-Co-Fe alloy films

Radial profile of bottom quarks in jets in high-energy nuclear collisions

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第6期45卷 167-175页

作者： sa Wang Wei Dai Ben-Wei Zhang Enke Wang Key Laboratory of Quark&Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan 430079China Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Southern Nuclear Science Computing CenterSouth China Normal UniversityGuangzhou 510006China School of Mathematics and Physics China University of GeosciencesWuhan 430074China

Angular correlations between a heavy quark(HQ)and its tagged jet are potentially new tools to gain insight into the in-medium partonic interactions in relativistic heavy-ion *** this work,we present the first theoretical study on the radial profiles of B mesons in jets in Pb+Pb collisions at the Large Hadron Collider(LHC).The initial production of a bottom quark tagged jet in p+p is computed by SHERPA,which matches the next-to-leading order matrix elements with contributions of parton showers,whereas the massive quark traversing the quark-gluon plasma is described by a Monte Carlo model,SHELL,which can simultaneously simulate light and heavy flavor in-medium energy loss within the framework of Langevin *** p+p collisions,we find that at lower PQ/T the radial profiles of heavy flavors in jets are sensitive to the heavy quark *** 0-10%Pb+Pb collisions at√SNN=5.02 TeV,we observe an inverse modification pattern of the B meson radial profiles in jets at4PQ/T20 GeV region naturally has a narrower initial distribution and consequently leads to a narrower modification pattern of the radial profile;however the diffusion nature of the heavy flavor in-medium interactions will give rise to a broader modification pattern of the radial *** two effects consequently compete and offset with each other,and the b quarks in jets benefit more from the former and suffer less diffusion effect compared to that of c quarks in *** findings can be tested in the future experimental measurements at the LHC to gain better understanding of the mass effect of jet quenching.

关键词： jet quenching quark-gluon plasma heavy flavor jet radial profile mass effect

Tailoring the separation performance of a carbon nanotube-based mixed matrix membrane decorated with metal–organic framework

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2023年第12期64卷 87-95页

作者： Hui-Yong Wu Hong-Xin Fu Yu Liu Xiao-sa Zhang Wen-Ze Li Jian Luan College of Science Shenyang University of Chemical TechnologyShenyang 110142China College of Sciences Northeastern UniversityShenyang 110819China

Synthesis of mixed matrix membranes(MMM)using carbon nanotubes(CNTs)has shown great prospects for achieving excellent selective separation because of its special ***,the preparation of highly selective MMM faces challenges,which is attributed to the obstacles encountered by CNTs dispersion in polymer matrix and elimination of interface defects.A novel CNT-based composite decorated with metal–organic framework(MOF)was synthesized and applied to the preparation of *** was post modified,and then carboxyl groups were inserted on the outer surface of *** synthetic MMM(Cu-MOF-en@MWCNT)not only has selective adsorption on dyes,but also has selective photodegradation on *** method of using CNTs to wrap the outside of MOF has great potential in dye *** performance of MMM was further improved by decorating MOF on the filler to improve the selectivity to the designated dye.

关键词： Composites Carbon nanotube Metal-organic framework Organic crosslinking Selectivity Adsorbents

C-reactive protein may be a prognostic factor for the whole gastroenteropancreatic neuroendocrine tumor group

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2019年第2期11卷 139-152页

作者： ?mer Koma? G?ksel Bengi ?zgül sa?ol Mesut Akarsu Department of Internal Medicine Dokuz Eylul University Faculty of Medicine Department of Gastroenterology Dokuz Eylul University Faculty of Medicine Department of Pathology Dokuz Eylul University Faculty of Medicine

BACKGROUND Long non-coding RNAs(lncRNAs) are a kind of single-stranded RNA of more than 200 nucleotides in length and have no protein-coding function. Amounting studies have indicated that lncRNAs could play a vital role in the initiation and development of cancers, including gastric cancer(GC). Considering the crucial functions of lncRNAs, the identification and exploration of novel lncRNAs in GC is *** To identify independent prognostic markers for the whole gastroenteropancreatic neuroendocrine tumor(GEP-NET) *** Ninety-three patients diagnosed with GEP-NETs within a specified period were included in this study. Patient data were retrospectively analyzed. The relationships between all independent variables and 5-year survival status calculated during the follow-up period(months) were assessed. In addition, the relationships between the independent variables were *** When 5-year survival rate was compared, a statistically significant relationship between the age at diagnosis, male gender, tumor size, tumor stage, liver and/or distant metastasis, and tumor grade determined by the Ki-67 level and mitotic count, and the level of C-reactive protein(CRP), was observed. The meansurvival(overall survival) of the study group was 102.5 ± 6.3(SD) mo. The percentages of 1, 3 and 5-year survival were 90%, 72%, and 61%, respectively. In63 of 93 patients, Ki-67 and the mitotic count determined the same grade. The Ki-67 levels in 29 patients and the mitotic count in only 1 patient were in the higher grade. The risk of death increased by 4% for every 1 year increase at the diagnosis age and was 2.0-fold higher for male patients, 3.0-fold higher for G3 according to the mitotic count, 3.7-fold higher for G3 according to the Ki-67 level, 12.7-fold higher for cases with tumor stage 3 or 4 by a 1 cm increase in the ratio of 9% in tumor size, and 6.1-fold higher for patients with liver metastasis for every 1 mg/dL increase in the ratio of 1.5% in CR

关键词： Gastroenteropancreatic neuroendocrine tumors C-reactive protein Prognostic factor Neuroendocrine tumors Gastrointestinal system