检索结果-南通市图书馆

Journal of Integrative Plant Biology 2008年第6期50卷 641-647页

作者： Hai-yan li Yun-Fei yang Institute of Grassland Science Northeast Normal University Key Laboratory of Vegetation Ecology Ministry of Education Changchun 130024 China

Green foxtail （Setaria viridis L.） is a common weed species in temperate regions. Research on the effect of delayed reproduction on the phenotypic plasticity and regularity of the vegetative and reproductive growth is of vital significance for understanding population regulation and control of the weed in the growing season. Green foxtail seeds were sown every 10 days from 25 June to 24 August of 2004. The growth and production metrics were measured via harvesting tufts and statistical analysis was carried out. The results showed that the reproductive tillers, seed number, seed biomass and one thousand-seed weight of plants at the first sowing （25 June） approximately increased 28.8, 7 827.0, 1 104,0 and 12.3 times compared with that at the last sowing （24 August）, respectively. Total tillers, reproductive tillers and height increased linearly as the reproductive period delayed, however, biomass increased exponentially. Quadratic equations best explained the relationships between the delayed reproductive period and seed number, inflorescence length, one thousand-seed weight, seed biomass. Based on the quantity and quality of seed production, weeding young seedlings emerging before July can be the most effective weed-control strategy in the Songnen Plain.

关键词： delayed reproduction life history phenotypic plasticity quantitative characteristics Setaria viridis weed control

Molecular Cloning and Bacterial Expression of Germacrene A Synthase cDNA from Crepidiastrum sonchifolium

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2006年第5期22卷 606-611页

作者： REN Jie liU yan-qiu yang li NI Rui YOU Song School of Pharmaceutical Engineering Shenyang Pharmaceutical UniversityShenyang 110016 P. R. China

Germacrene A synthase（GAS） catalyzes the biosynthesis of germacrene A, which is a key precursor for sesquiterpone lactones. Cloning of a novel full-length cDNA encoding GAS from the medicinal plant Crepidiastrum sonchifolium（dosignated CsGAS） is reported in this study. The cDNA is 1837 bp long and contains a 1680-bp open reading frame encoding a 559 amino-acid protein. The functional expression of the cDNA in Escherichia coli, as an N-terminal thioredoxin fusion protein, with the pET32a vector yielding a recombinant enzyme. Sequence analysis was used to compare this enzyme with the mechanistically related epi-aristolochene synthase from tobacco, and the effect of possible involvement of a number of amino acids in sesquiterpone synthase on product specificity was also discussed.

关键词： Germacrene A synthase Crepidiastrum sonchifolium Sesquiterpene synthase Expression Fusion protein

Rapid progression of atherosclerosis in a patient with acute coronary syndrome and ANCA-associated vasculitis:split or confluence?

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2022年第5期19卷 403-408页

作者： Ya-Chao li Meng-Jie LEI yan-li yang Zeng-Ming XUE Department of Cardiology Langfang People’s HospitalHebei Medical UniversityLangfang Core Laboratory of Precision Treatment of CADLangfangHebei ProvinceChina

A59-year-old female patient was admitted to our hospital on 9 March 2021,due to recurrent chest *** underwent percutaneous coronary intervention,with a focus on the proximal segment of the left anterior descending(LAD)artery,six months prior to *** patient had a long-term history of hyperlipidaemia and obstructive sleep apnoea syndrome(OSAS).She also had rheumatoid arthritis and ANCA-associated vasculitis that lasted for more than 10 years and a 9-year history of concomitant *** was on long-term oral leflunomide and intermittent oral *** patient underwent a computed tomography angiogram(CTA)six years ago(2015),which showed minor atherosclerotic plaque build-up in the LAD artery and the right coronary artery(RCA)(Figure 1).

关键词： coronary patient admitted

NUMERICAL SIMULATION OF UPliFT FORCES ON SLAB IN PLUNGE POOL

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2002年第3期14卷 91-96页

作者： li, yan-ling yang, Yong-Quan Zhang, Jian-Min Hydraulics Lab. of High Speed Flows Sichuan Univ. Chengdu 610065 China

The mechanism of the fluid-solid coupled vibration is analyzed as the fluctuating pressure acts on the inlet and the outlet slits of a slab. The parameter multinomial method was exploited to calculate the pressure field within the joints of the slabs by solving the basic equations of the oscillation flow. The calculated result shows that the time-averaged uplift increases with the increase of the length of the slab and is large in the middle and is small in both sides. The time-averaged uplift reduces with the increase of water depth, and the fluctuating uplift reduces rapidly with the increase of the thickness of the slit. The calculated result is in agreement with the experimental results.

关键词： Energy dissipators Flow of fluids Numerical analysis Uplift pressure Vibrations (mechanical)

Novel conservative treatment for peritoneal dialysis-related hydrothorax:Two case reports

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2020年第24期8卷 6437-6443页

作者： Bin-Bin Dai Bei-Duo lin li-yan yang Jian-Xin Wan yang-Bin Pan Department of Nephrology The First Affiliated Hospital of Fujian Medical UniversityFuzhou 350005Fujian ProvinceChina Department of Nephrology Shanghai Pudong HospitalShanghai 201399China

BACKGROUND Peritoneal dialysis (PD) is an important renal replacement therapy for patientswith end-stage renal disease. PD-related hydrothorax is a rare but seriouscomplication in PD patients, produced by the movement of peritoneal dialysatethrough pleuroperitoneal fistulas. In previous reports, patients with hydrothoraxsecondary to PD were usually recommended to discontinue PD and transfer tohemodialysis (HD). Herein, we describe another method of managing thiscomplication—with an adjusted PD prescription and continuous drainage ofpleural effusion, patients could continue PD without recurrence of *** SUMMARY In this report, we present the medical records of 2 patients with hydrothoraxsecondary to PD. We recommended intermittent PD with continuous drainage ofpleural effusion. A type 18Ga soft catheter was placed to drain pleural ***-guided thoracentesis was performed, and the soft catheter was placedin the pleural cavity for a long period (3 mo and 2 mo, respectively). The pleuralcatheter was removed when no fluid was drained from the pleural cavity. Afterseveral months, pleuroperitoneal fistulas were closed in both patients and PD wascontinued. These patients did not transfer to HD, had no recurrence ofhydrothorax and were still treated with PD after 1 *** These 2 case reports show that continuous drainage of pleural effusion with an18Ga soft catheter is a useful method for hydrothorax secondary to PD.

关键词： Peritoneal dialysis End-stage renal disease Hydrothorax Treatment Conservative Case report

Development and Research on the Internet Resources Aggregation Platform

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2007年第2期12卷 243-248页

作者： XU Youwei TANG Shengqun yang yan XU yang li ling State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 Hubei China

We proposed an Intemet resource aggregation platform based on semantic web. The platform includes an Web Ontology Language（OWL） ontology design toolkit（VO-Editor） and a selective inference algorithm engine so that it can visually editing ontology and using novel selective reasoning for information aggregation. We introduce the VO-Editor and the principle of selective inference algorithm. At last a case of budget travel system is used to interpret the approach of Internet resources aggregation by this platform.

关键词： semantic web ontology information aggregation inference Web Ontology Language

Quantum Mechanical Nature in liquid NMR Quantum Computing

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2002年第3期38卷 305-308页

作者： LONG Gui-Lu yan Hai-yang li yan-Song TU Chang-Cun ZHU Sheng-Jiang RUAN Dong SUN yang TAO Jia-Xun CHEN Hao-Ming Department of Physics Tsinghua University Beijing 100084 China Laboratory for Quantum Computation and Quantum Measurement Beijing 100084 China Center for Atomic and Molecular Nano-Sciences Tsinghua University Beijing 100084 China Institute of Theoretical Physics the Chinese Academy of Sciences Beijing 100080 China Department of Physics Tsinghua University Beijing 100084 ChinaLaboratory for Quantum Computation and Quantum Measurement Beijing 100084 China Department of Physics Tsinghua University Beijing 100084 ChinaLaboratory for Quantum Computation and Quantum Measurement Beijing 100084 China Department of Physics Tsinghua University Beijing 100084 ChinaLaboratory for Quantum Computation and Quantum Measurement Beijing 100084 China Department of Physics Tsinghua University Beijing 100084 China Department of Physics Tsinghua University Beijing 100084 China Department of Physics Tsinghua University Beijing 100084 China Laboratory for Quantum Computation and Quantum Measurement Beijing 100084 China Department of Physics and Astronomy University of Tennessee Knoxville Tennessee 37996 USA Department of Chemistry Tsinghua University Beijing 100084 China Department of Physics Tsinghua University Beijing 100084 China

The quantum nature of bulk ensemble NMR quantum computing the center of recent heated debate,is addressed. Concepts of the mixed state and entanglement are examined, and the data in a two-qubit liquid NMRquantum computation are analyzed. The main points in this paper are: i) Density matrix describes the "state" of anaverage particle in an ensemble. It does not describe the state of an individual particle in an ensemble; ii) Entanglementis a property of the wave function of a microscopic particle (such as a molecule in a liquid NMR sample), and separabilityof the density matrix cannot be used to measure the entanglement of mixed ensemble; iii) The state evolution in bulk-ensemble NMRquantum computation is quantum-mechanical; iv) The coefficient before the effective pure state densitymatrix, e, is a measure of the simultaneity of the molecules in an ensemble. It reflects the intensity of the NMR signaland has no significance in quantifying the entanglement in the bulk ensemble NMR system. The decomposition of thedensity matrix into product states is only an indication that the ensemble can be prepared by an ensemble with theparticles unentangled. We conclude that effective-pure-state NMR quantum computation is genuine, not just classicalsimulations.

关键词： quantum mechanical nature, NMR quantum computing, mixed state, entanglement

Potentials of marine natural products against malaria, leishmaniasis, and trypanosomiasis parasites: a review of recent articles

在线全文

学校读者我要写书评

暂无评论

Infectious Diseases of Poverty 2021年第1期10卷 95-96页

作者： Justus Amuche Nweze Florence N.Mbaoji yan-Ming li li-yan yang Shu-Shi Huang Vincent N.Chigor Emmanuel A.Eze li-Xia Pan Ting Zhang Deng-Feng yang Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry National Engineering Research Center of Non-Food Biorefi neryState Key Laboratory of Non-Food Biomass and Enzyme TechnologyGuangxi Academy of SciencesNanning 530007GuangxiPeople's Republic of China Nation al Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionWHO Collaborating Center for Tropical DiseasesNatio nal Center for Inter national Research on Tropical DiseasesKey Laboratory of Parasite and Vector Biology of the Chinese Ministry of HealthShanghai 200025People's Republic of China Full list of author information is available at the end of the article

Background:Malaria and neglected communicable protozoa parasitic diseases,such as leishmaniasis,and trypanosomiasis,are among the otherwise called diseases for neglected communities,which are habitual in underprivileged populations in developing tropical and subtropical regions of Africa,Asia,and the *** of the currently available therapeutic drugs have some limitations such as toxicity and questionable efficacy and long treatment period,which have encouraged *** have prompted many researchers to focus on fin ding new drugs that are safe,effective,and affordable from marine environ *** aim of this review was to show the diversity,structural scaffolds,in-vitro or in-vivo efficacy,and recent progress made in the discovery/isolation of marine natural products(MNPs)with potent bioactivity against malaria,leishmaniasis,and *** text:We searched PubMed and Google scholar using Boolean Operators(AND,OR,and NOT)and the combination of related terms for articles on marine natural products(MNPs)discovery published only in English language from January 2016 to June *** nine articles reported the isolation,identification and antiparasitic activity of the isolated compounds from marine environment.A total of 125 compounds were reported to have been isolated,out of which 45 were newly isolated *** compounds were all isolated from bacteria,a fungus,sponges,algae,a bryozoan,cnidarians and soft *** recent years,great progress is being made on anti-malarial drug discovery from marine organisms with the isolation of these potent ***,some of these promising antikinetoplastid MNPs have potency better or similar to conventional drugs and could be developed as both antileishmanial and antitrypanosomal ***,very few of these MNPs have a pharmaceutical destiny due to lack of the following:sustainable production of the bioactive compounds,stan da rd efficient screening methods,knowledge of the me

关键词： Marine natural products Neglected tropical diseases Anti-trypanosoma Anti-leishmania Anti-plasmodia Protozoa parasites

sPLA2-IB Level Correlates with Hyperlipidemia and the Prognosis of Idiopathic Membranous Nephropathy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Medical Science 2020年第4期40卷 683-690页

作者： li-yan yang Yuan-sheng WU Bin-bin DAI Song-hua liN Hong CHEN Guo-ping li Xuan TAO Jian-xin WAN yang-bin PAN Department of Nephrology the First Affiliated Hospital of Fujian Medical UniversityFuzhou 350005China Shanghai Pudong Hospital Fudan University Pudong Medical CenterShanghai 201399China Department of Cardiology the First Affiliated Hospital of Fujian Medical UniversityFuzhou 350005China Department of Pathology the First Affiliated Hospital of Fujian Medical UniversityFuzhou 350005China

Summary:Recent studies suggested that serum secretory phospholipase A2 group IB(sPLA2-IB)was increased in idiopathic membranous nephropathy(IMN).However,the interference of high lipemia on the sPL.A2-IB levels was not taken into account in these *** present study aimed to investigate the correlation between sPLA2-IB and lipemia,and the clinical merit of sPLA2-IB in the prediction of prognosis of IMN patients.A total of 64 IMN patients,39 immunoglobulin A nephropathy(IgAN)patients and 64 healthy controls were included in the *** levels of serum sPLA2-IB,lipemia and proteinuria were *** IMN patients were followed up for 6 *** stages were made for all IgAN and IMN *** results showed that the levels of serum sPLA2-IB,cholesterol and low-density lipoprotein cholesterol(LDL-C)were significantly higher,and the levels of albumin and high-density lipoprotein cholesterol(HDL-C)were significantly lower in IMN patients than in healthy controls and IgAN *** sPLA2-IB levels were also found to be higher in IgAN patients than in heathy controls,but the association of serum sPLA2-IB levels with proteinuria,cholesterol and albumin was only shown in IMN *** against M-type receptor for secretory phospholipase A2(PLA2R1)was positive in 813%IMN *** sPLA2-IB deposition,podocyte fused processes,and density deposition on thickened basement membrane were seen in IMN patients,but not in IgAN *** patients with lower sPLA2-IB and proteinuria levels were found to have better outcome after the 6-month *** IMN patients,sPLA2-IB levels were significantly increased in both serum and renal *** conclusion,serum sPLA2-IB was closely correlated with proteinuria,albumin and cholesterol,and IMN patients with lower sPLA2-IB levels were more likely to achieve a better outcome.

关键词： sPLA2-IB lipemia idiopathic membranous nephropathy prognosis

Positive reverse transcription-polymerase chain reaction assay results in patients recovered from COVID-19: Report of two cases

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第12期9卷 2816-2822页

作者： Ke-Xin Huang Cheng He yan-li yang Di Huang Zhi-Xia Jiang Bang-Guo li Heng liu Department of Radiology The Affiliated Hospital of Zunyi Medical UniversityZunyi 563000Guizhou ProvinceChina Department of Nursing Guizhou Jiangjunshan HospitalGuiyang 563000Guizhou ProvinceChina

BACKGROUND Coronavirus disease 2019(COVID-19)has spread around the *** February 28,2020,the World Health Organization adjusted the risk of spread and impact of COVID-19 to“very high”at the global *** have mainly focused on the etiology,epidemiology,and treatment of COVID-19 to limit further spread and the negative impact of the disease,while less attention has been devoted to the follow-up and reexamination of patients who recovered from COVID-19 or were released from *** SUMMARY This study reports two cases where patients who had negative reverse transcription-polymerase chain reaction(RT-PCR)test results and met the criteria for discharge subsequently had positive RT-PCR test *** clinical manifestations and computed tomography(CT)findings of these patients were *** conversion of RT-PCR test results in these two patients may be related to false-negative and false-positive outcomes of the *** images helped track improvement of pulmonary *** The timing of discharge of COVID-19 patients should be determined by comprehensive analysis of CT images and RT-PCR test results.

关键词： COVID-19 False negative Recovery Reverse transcription-polymerase chain reaction SARS-CoV-2 Case report