检索结果-南通市图书馆

Ecological and habitat ranges of orchids in the northernmost regions of their distribution areas:A case study from Ural Mountains,Russia

引用

Plant Diversity 2023年第2期45卷 211-218页

作者： irina A.Kirillova Yuriy A.Dubrovskiy Svetlana V.Degteva Alexander B.Novakovskiy Institute of Biology of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences 28 Kommunisticheskaya St.167982SyktyvkarKomi RepublicRussia

The Orchidaceae,which is one of the most interesting families of angiosperms,contains a large number of rare *** their acknowledged importance,little attention has been paid to the study of orchids distributed in northern *** this study,we determined the syntaxonomical diversity and ecological parameters of orchid habitats in two of Europe's largest protected areas,the Pechoro-Ilychsky Reserve and the Yugyd Va National Park(northeastern European Russia),and then compared our findings to those in other parts of orchid distribution *** this purpose,we studied 345 descriptions of plant communities(releves) containing species from Orchidaceae and defined habitat parameters using Ellenberg indicator values with the community weight mean approach,nonmetric multidimensional scaling(NMS),and relative niche *** found that orchids were distributed in eight habitat types and 97 plant *** largest number of orchid species is found in forest *** of the orchid species under study occur in the mires and rock habitats with open *** orchids consistently occur in areas disturbed by human *** addition,our study indicates that the main drivers of orchid distribution across the vegetation types are light and soil *** analysis of the ecological parameters of orchid habitats indicates that some orchid species can be classified as habitat specialists that are confined to a relatively narrow ecological niche in the Urals(e.g.,Goodyera repens,Cypripedium guttatum and Dactylorhiza maculata).Several other species(*** cordata and Dactylorhiza fuchsia) grow under diverse ecological parameters.

关键词： Orchidaceae Plant communities Nature protected areas Community weight mean Illumination Moisture

来源：

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

Demographic determinants of risk,colon distribution and density scores of diverticular disease

引用

World Journal of Gastroenterology 2011年第8期17卷 1009-1017页

作者： Mark Golder irina Chis Ster Pratusha Babu Amita Sharma Muhammad Bayat Abdulkadir Farah Centre for Academic Surgery Institute of Cell and Molecular Science Barts and the London School of Medi-cine and Dentistry Queen Mary University MRC centre for Paediatric Epidemiology and Biostatistics University College Department of Radiology University Hospital Lewisham

AIM:To investigate associations between ethnicity,age and sex and the risk,colon distribution and density scores of diverticular disease(DD).METHODS:Barium enemas were examined in 1000 patients:410 male,590 female;760 whites,62 Asians,44 black africans(BAs),and 134 other blacks(OBs).Risks and diverticula density of left-sided DD(LSDD) and rightsided-component DD(RSCDD = right-sided DD + right and left DD + Pan-DD) were compared using logistic ***:Four hundred and forty-seven patients had DD(322 LSDD and 125 RSCDD).Adjusted risks:(1) LSDD:each year increase in age increased the odds by 6%(95% CI:5-8,SE:0.8%,P < 0.001);Asians:odds ratio(OR):0.23(95% CI:0.10-0.53,SE:0.1,P ≤ 0.001) and OBs:OR:0.25(95% CI:0.14-0.43,SE:0.07,P ≤ 0.001) appeared protected vs Whites;(2) RSCDD:each year increase in age increased the odds by 4%(95% CI:2-6,SE:1%,P < 0.001);females were 0.60 times(95% CI:0.40-0.90,SE:0.12,P = 0.01) less likely than males to have RSCDD;BAs were 3.51 times(95% CI:1.70-7.24,SE:1.30,P < 0.001) more likely than Whites to have RSCDD;and(3) DD density scores:each year increase in age increased the odds of highdensity scores by 4%(95% CI:1-6,SE:1%,P < 0.001);RSCDD was 2.77 times(95% CI:1.39-3.32,SE:0.67,P < 0.001) more likely to be of high density than *** further signif icant differences were found in the adjusted ***:Right colonic DD might be more common and has higher diverticula density in the west than previously *** appear predisposed to DD,whereas other ethnic differences appear conserved following migration.

关键词： Diverticular disease Migration Barium enema Ethnicity Colon distribution Risk

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Orbital magneto-optical response of periodic insulators from first principles

引用

npj Computational Materials 2019年第1期5卷 874-882页

作者： irina V.Lebedeva David A.Strubbe Ilya V.Tokatly Angel Rubio Nano-Bio Spectroscopy Group and ETSF Departamento de Física de MaterialesUniversidad del País Vasco UPV/EHU20018 San SebastiánSpain Department of Physics School of Natural SciencesUniversity of CaliforniaMercedCA 95343USA Donostia International Physics Center(DIPC) Manuel de Lardizabal 520018 San SebastiánSpain IKERBASQUE Basque Foundation for Science48011 BilbaoSpain Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science Luruper Chaussee 14922761 HamburgGermany

Magneto-optical response,*** response in the presence of a magnetic field,is commonly used for characterization of materials and in optical ***,quantum mechanical description of electric and magnetic fields in crystals is not straightforward as the position operator is ill *** present a reformulation of the density matrix perturbation theory for time-dependent electromagnetic fields under periodic boundary conditions,which allows us to treat the orbital magneto-optical response of solids at the ab initio *** efficiency of the computational scheme proposed is comparable to standard linearresponse calculations of absorption spectra and the results of tests for molecules and solids agree with the available experimental data.A clear signature of the valley Zeeman effect is revealed in the continuum magneto-optical spectrum of a single layer of hexagonal boron *** present formalism opens the path towards the study of magneto-optical effects in strongly driven low-dimensional systems.

关键词： periodic magneto solids

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Detection and evaluation of different morphological forms of Mycoplasma hominis in human semen

引用

Asian Journal of Andrology 2024年第1期26卷 71-76页

作者： Elizaveta Bragina Tatyana Sorokina Avtandil Chogovadze Yulia Shevchenko Vyacheslav Chernykh Olga Barkhatova irina Rakovskaya Research Centre for Medical Genetics Moscow 115522Russia A.N.Belozersky Institute of Physico-Chemical Biology Lomonosov Moscow State University Moscow 119992Russia Reprolab Limited Liability Company Moscow 119333Russia N.I.Pirogov Russian National Research Medical University Moscow 117997Russia Federal Government Budgetary Institution"National Research Center for Epidemiology and Microbiology Named after Honorary Academician N.F.Gamaleya of the Ministry of Health of the Russian Federation" Moscow 123098Russia

Recently discovered microcolonial forms of Mycoplasma hominis(***)and their impact on human spermatogenesis are *** spermatozoa of 125 fertile men(sperm donors;from Reprobank[Reproductive Tissue Bank,Moscow,Russial)and of 93 patients with fertility problems(from the Federal State Budgetary Institution"Research Centre for Medical Genetics[RCMG]",Moscow,Russia)were *** colonies of *** and microcolonies were detected by molecular biological methods,culture of bacteria,and transmission electron *** unique structure of microcolonial cells,in which the cytoplasmic cylinder is surrounded by concentric electron-dense and electron-light layers with a periodicity of 12-14 nm,and the ability of microcolonial cells to attach to spermatozoa are *** patients with lower sperm quality,microcolonies of *** were detected 2.5 times more frequently than classical *** detection of microcolonies in the ejaculate and the frequent isolation of microcolonies from sperm samples of patients with fertility problems suggest that microcolonial cells may be one cause of infertility.

关键词： ejaculate fertility Mycoplasma hominis spermatogenesis transmission electron microscopy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Development and evaluation of a patient decision aid for pediatric interval appendectomy

引用

World Journal of Pediatric Surgery 2022年第4期5卷 275-281页

作者： Victoria Larocca irina Oltean Viviane Grandpierre Ahmed Nasr Children's Hospital of Eastern Ontario Research Institute OttawaOntarioCanada Pediatric Surgery Children's Hospital of Eastern OntarioOttawaOntarioCanada

Objective One option for the treatment of perforated appendicitis in pediatric patients is interval appendectomy(IA).A patient decision aid(PDA)can be useful in the decision-making process regarding *** purpose of this study was to evaluate parents’decisional conflict before and after engaging with a developed *** Participants included(a)parents who are considering IA surgery for their child,(b)have not yet had their follow-up appointment postdischarge,and(c)were fluent in either the official languages of English or *** study used a pretest and post-test design to measure participants’decisional conflict and treatment option *** and acceptability of the PDA were also *** A total of 18 participants completed the study(16 mothers).Major findings include significant decreases in all Decisional Conflict Scale items from pre-PDA to post-PDA engagement,except for one *** majority of participants perceived the PDA to be useful,easy to find information regarding risks and provided enough information to help them make a decision regarding their child’s *** This is the first study to develop and evaluate a PDA among parents who are making a decision regarding IA *** results showed a significant decrease in decisional conflict after using the *** results also showed that the PDA was generally accepted among parents and had positive perceptions regarding length,content,and *** use of PDA for this population can help ease feelings of decisional conflict and equip parents with the information to make informed decisions.

关键词： decision enough conflict

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genetic and phenotypic analyses reveal major quantitative loci associated to fruit size and shape traits in a non-flat peach collection ( P. persica L. Batsch)

引用

Horticulture Research 2021年第1期8卷 3211-3227页

作者： Marco Cirilli irina Baccichet Remo Chiozzotto Cristian Silvestri Laura Rossini Daniele Bassini Universita degli Studi di Milano-DiSAA MilanoItaly Universita degli Studi della Tuscia-DAFNE ViterboItaly

Fruit size and shape are critical agronomical and pomological attributes and prime targets in peach breeding *** from the flat peach type,a Mendelian trait well-characterized at the genetic level,ample diversity of fruit size and shapes is present across peach ***,knowledge of the underlying genomic loci remains *** this work,fruit size and shape were assessed in a collection of non-flat peach accessions and selections,under controlled fruit load *** architecture of these traits was then dissected by combining association and linkage mapping,revealing a major locus on the proximal end of chromosome 6(qSHL/Fs6.1)explaining a large proportion of phenotypic variability for longitudinal shape and also affecting fruit size.A second major locus for fruit longitudinal shape(qSHL5.1),probably also affecting fruit size,was found co-localizing at locus G,suggesting pleiotropic effects of peach/nectarine *** additional QTL for fruit longitudinal shape(qSHL6.2)was identi fied in the distal end of chromosome 6 in a cross with an ornamental double-flower peach and co-localized with the Di2 locus,controlling flower *** assisting breeding activities,knowledge of loci controlling fruit size and shape paves the way for more in-depth studies aimed at the identification of underlying genetic variant(s).

关键词： shape size breeding

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Efficacy of a combination of dutasteride, tadalafil, and solifenacin in the treatment of previously unsuccessful patients

引用

Asian Journal of Urology 2022年第1期9卷 42-50页

作者： Kirill Kosilov irina Kuzina Vladimir Kuznetsov Olga Barabash Ekaterina Fedorishcheva Department of Social Sciences School of HumanitiesFar Eastern Federal UniversityVladivostokPrimorsky regionRussian Federation Department of Clinical Medicine School of MedicineFar Eastern Federal UniversityVladivostokPrimorsky regionRussian Federation Department of Public Health Pacific State Medical UniversityVladivostokPrimorsky regionRussian Federation Department of Physical Culture and Health and Sports Work Vladivostok State University of Economics and ServiceVladivostokPrimorsky regionRussian Federation

Objective To evaluate the efficacy and safety of simultaneous administration of dutasteride,tadalafil and solifenacin in the treatment of benign prostatic hyperplasia(BPH)with overactive bladder symptoms and lower urinary tract obstruction in previously unsuccessfully treated *** Patients in Group A(n=97)received dutasteride 0.5 mg/day,tadalafil 2.5 mg/day,and solifenacin 2.5 mg/day;Group B(n=95)received dutasteride 0.5 mg/day,tadalafil 5 mg/day,and solifenacin 5 mg/day;Group C(n=103)received dutasteride 0.5 mg/day,tadalafil 20 mg/day,and solifenacin 10 mg/*** functional status of the lower urinary tract was assessed using the International Prostate Symptom Score(I-PSS),Overactive Bladder Questionnaire(OABq),International Index of Erectile Function(IIEF),and Male Sexual Health Questionnaire Ejaculatory Dysfunction(MSHQ-EjD)as well as *** The total score of the sexual function remained unchanged in Group B of patients 81.3 points vs.80.2 points(p>0.05)according to MSHQ-EjD,61.4 points vs.51.2 points(p>0.05)according to IIEF *** total assessment of symptoms of hyperactivity significantly decreased in Group C according to OABq data after the 4th week of the study(17.5 points vs.26.1 points,p<0.05)and remained below the baseline until the end of the study(15.2 points).Conclusions The simultaneous administration of standard doses of dutasteride,solifenacin,and tadalafil for 3 months is safe,effective,and can be recommended for patients with BPH to reduce symptoms of obstruction and hyperactivity of the bladder and maintain sexual function.

关键词： Lower urinary tract symptoms Benign prostatic hyperplasia Dutasteride Tadalafil Solifenacin Sexual function

来源：

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

Novel method for the preparation of Cs-containing FAU（Y） catalysts for aniline methylation

引用

Frontiers of Chemical Science and Engineering 2018年第1期12卷 70-76页

作者： Olga A. Ponomareva Polina A. Shaposhnik Marina Vo Belova Boris A. Kolozhvari irina I. Ivanova Department of Chemistry Lomonosov Moscow State University Moscow 119991 Russia A.V. Topchiev Institute of Petrochemical Synthesis Moscow Russia

Cs-containing FAU（Y）-type zeolite catalysts were prepared by conventional and novel ion exchange procedures followed by incipient wetness impregnation with CsOH. The novel ion exchange procedure involved hydrothermal treatment of NaY zeolite in aqueous solution of CsCl at 140-200 ℃ for 6-24 h. The samples were characterized by low-temperature nitrogen adsorption, X-ray fluorescence analysis, X-ray powder diffraction, scanning electron microscopy, 23Na, 27Al and 133Cs magic angle spinning nuclear magnetic resonance, CO2 and NH3-Temperature programmed desorption. The results show that hydrothermal treatment at 200 ℃ allows to obtain higher degrees of ion-exchange （up to 83%） with respect to conventional method giving maximum 66%- 69%. Catalytic properties of Cs-containing FAU（Y） were studied in aniline methylation. The yield of Nomethylani- line is shown to correlate with catalyst＇s basicity. The best catalyst performance was achieved over the catalyst with the highest ion-exchange degree impregnated with CsOH. The selectivity to N-methylaniline over this catalyst reached 96.4%.

关键词： FAU(Y) zeolite ion exchange with cesium aniline alkylation N-methylaniline

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

LIVE IMAGING OF EARLY DEVELOPMENTAL PROCESSES IN MAMMALIAN EMBRYOS WITH OPTICAL COHERENCE TOMOGRAPHY

引用

Journal of Innovative Optical Health Sciences 2009年第3期2卷 253-259页

作者： KIRILL V.LARIN irina V.LARINA MICHAEL LIEBLING MARY E.DICKINSON Department of Biomedical Engineering University of Houston HoustonTXUSA Department of Molecular Physiology and Biophysics Baylor College of Medicine HoustonTXUSA Department of Electrical and Computer Engineering University of California Santa BarbaraCAUSA

Early embryonic imaging of cardiovascular development in mammalian models requires a methodthat can penetrate through and distinguish the many tissue layers with high spatial and temporalresolution. In this paper we evaluate the capability of Optical Coherence Tomography (OCT)technique for structural 3D embryonic imaging in mouse embryos at different stages of thedevelopmental process ranging from 7.5 dpc up to 10.5 dpc. Obtained results suggest that thecollected data is suitable for quantitative and qualitative measurements to assess cardiovascularfunction in mouse models, which is likely to expand our knowledge of the complexity of theembryonic heart, and its development into an adult heart.

关键词： Optical Coherence Tomography non-invasive mouse embryos cardiovascular function.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomineralization of organic matter in cobalt-rich crusts from the Marcus–Wake Seamounts of the western Pacific Ocean

引用

Acta Oceanologica Sinica 2014年第12期33卷 67-74页

作者： ZHAO Jun ZHANG Haisheng WU Guanghai LU Bing PULYAEVA irina A ZHANG Haifeng PANG Xuehui Key Laboratory of Marine Ecosystem and Biogeochemistry Second Institute of Oceanography State Oceanic Administration State Scientific Centre Yuzhmorgeologia Gelendzhik 353461 Russia School of Chemistry and Engineering University of Jinan

Organic matter in cobalt-rich crust （CRC） from the Marcus-Wake Seamounts of the western Pacific Ocean, Sample CM1D03, has been analyzed to understand the source, geochemistry and mineralization of organic matter, and the mineralization environment. Biomarkers, includingn-alkanes, isoprenoids, terpanes and sterols, have been detected in various layers of the CRC sample, using gas chromatography （GC） and gas chromatography-mass spectrometry （GC-MS）. The content of organic carbon （OC） and its stable isotope （δ13C）, and the combined features of the biomarkers show that the mineralized organic matter in CM1D03 CRC was mainly derived from microorganisms and lower plankton （e.g., bacteria and algae, respectively） from marine surface water, with some terrestrial higher plant components. The ratio of chloroform bitu-men ＂A＂： OC was high in the CRC, between 10.51 and 20.66, showing significant migration characteristics of n-alkanes. Four mineralization categories of organic matter were recognized based on GC chromatograms ofn-alkane molecules：（1） primitive type （bacteria and algae）, which is characterized by moderately mature ofn-alkanes preserving the original characteristics of the organic matter from microorganisms and lower plankton; （2） microbial degradation type, which is characterized by low contents ofn-alkanes and rising baseline in the chromatogram, with the ＂bulge＂ being the products of organic matter by biodegradation; （3） organic matter migration type, which is characterized by low carbon number ofn-alkanes withnC18 as the main peak carbon, without odd even predominance, and low concentrations of isoprenoids and hydro-carbons with high carbon number; and （4） organic matter hydrothermal type, which is characterized by relatively low concentration of small molecular weightn-alkanes, pristane, and phytane, accompanied by higher concentration ofn-alkanes with carbon number greater thannC18. This study shows that biomarkers can record controlling factors of mineraliz

关键词： ubiomineralization cobalt-rich crust biomarker Marcus-Wake Seamounts

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：