检索结果-南通市图书馆

远震数据显示贝加尔裂谷带北穆伊斯克(Severomuysk)段地壳和上地幔的精细结构

在线全文

学校读者我要写书评

暂无评论

地学前缘 2022年第2期29卷 378-392页

作者： valentina v.mordvinova Maria A.KHRITOvA Elena A.KOBELEvA Mikhail M.KOBELEv Evgeniy Kh.TURUTANOv victor S.KANAYKIN Institute of the Earth’s Crust Siberian Branch of the Russian Academy of Science Irkutsk 664033Russia Baikal Branch of the Geophysical Service of the Russian Academy of Science Irkutsk 664033Russia Irkutsk National Research Technical University Irkutsk 664074Russia

通过贝加尔裂谷系统北穆伊斯克(Severomuysk)段的密集地震台站线性网络获得的远距离强震记录,并利用P波接收函数技术,揭示了地壳和上地幔顶部的复杂分层块状结构。横波速度的分布表明构成北穆伊斯克地壳的地块具有不同性质。这些地块的... 详细信息

通过贝加尔裂谷系统北穆伊斯克(Severomuysk)段的密集地震台站线性网络获得的远距离强震记录,并利用P波接收函数技术,揭示了地壳和上地幔顶部的复杂分层块状结构。横波速度的分布表明构成北穆伊斯克地壳的地块具有不同性质。这些地块的西部聚散和地壳下部的分层证实了该地区隆起的堆积-碰撞起源。位于西伯利亚克拉通变薄的倾斜边缘上的北穆伊斯克段解释了该地区地壳碰撞效应的强度。2015年地震的震中深度与Muyakan凹陷地壳上部的明显速度差异存在令人信服的相关性。

关键词：地球物理学 P-波接收函数地震速度剖面西伯利亚克拉通贝加尔裂谷带

同方期刊数据库

Seasonal Dynamics of Male and Female Reproductive Systems in the Siberian Salamander, Salamandrella keyserlingii (Caudata, Hynobiidae)

在线全文

学校读者我要写书评

暂无评论

Asian Herpetological Research 2015年第3期6卷 169-183页

作者： vadim v.YARTSEv valentina N.KURANOvA Department of vertebrate Zoology and Ecology Institute of BiologyTomsk State University

It is not well known how low temperatures, like a subarctic steppe–tundra climate, influence reproductive traits of ectothermic vertebrates. To begin answering this question, we studied male and female reproductive systems of Salamandrella keyserlingii inhabiting a Tomsk population（southeast of Western Siberia）, Russia, in ecological and physiological terms. In males, before spermiation, the testicular size and weight in late April–early May were greatest of all. Spermiation occurred during breeding immigration in spring when mean air temperature was above 10°С, and at the same time rain fell. After spermiation, the testicular size and weight decreased sharply, and the diameter of the vasa deferentia increased. ＂Spawning＂（i.e., simultaneous extrusion of sperm and oviposition） occurred from late April to late May, and this duration fluctuated in temperature and humidity. The testicular size and weight increased in summer. Sperm mass was detected in the testes by the smear method in April–September, except in June when single fragmented unrealized sperm was detected and in July when spermatids were detected. In females, ovarian weight was greatest in spring before ovulation. From late June, vitellogenesis began in ovarian follicles, in which mint green yolks accumulated. Melanin deposited in the surface of the ovary from July when oviducts were hypertrophying. In contrast, some large-sized females did not show any sexual maturity shortly before hibernation（although these females may be subadults）. These results suggest that low temperatures in Siberia induce early timing of gamete maturation in females, but the females＇ reproductive cycle might also be biennial. A reproductive cycle in males was annual with the completion of the gamete maturation process in August.

关键词： annual reproductive cycle biennial reproductive cycle breeding immigration gamete maturation subarctic climate

Psycho-gastroenterological profile of an Italian population of children with disorders of gut-brain interaction:A case-control study

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Pediatrics 2025年第1期14卷 69-77页

作者： valentina Giorgio Ilaria venezia Licia Pensabene Elisa Blasi Donato Rigante Paolo Mariotti Giuseppe Stella Gaia Margiotta Giovanna Quatrale Giuseppe Marano Marianna Mazza Antonio Gasbarrini Eleonora Gaetani Pediatric Unit Department of WomenChildren and Public Health SciencesFondazione Policlinico Universitario“A.Gemelli”IRCCSUniversitàCattolica del Sacro CuoreRome 00168Italy Child Neuropsychiatry Unit ASST Santi Paolo e CarloSan Paolo HospitalMilan 20142Italy Child Neuropsychiatry Unit Department of WomenChildren and Public Health SciencesFondazione Policlinico Universitario“A.Gemelli”IRCCSUniversitàCattolica del Sacro CuoreRome 00168Italy Department of Medical and Surgical Sciences Pediatric UnitUniversity Magna GraeciaCatanzaro 88100Italy Unit of Psychiatry Fondazione Policlinico Universitario“A.Gemelli”IRCCSRome 00168Italy Department of Neurosciences UniversitàCattolica del Sacro CuoreRome 00168Italy Department of Internal Medicine and Gastroenterology Fondazione Policlinico Universitario"A.Gemelli"IRCCSRome 00168Italy Department of Medical and Surgical Sciences Fondazione Policlinico Universitario"A.Gemelli"IRCCSUniversitàCattolica del Sacro CuoreRome 00168Italy

BACKGROUND Disorders of gut-brain interaction(DGBI)are common,but knowledge about their physiopathology is still poor,nor valid tools have been used to evaluate them in *** To develop a psycho-gastroenterological questionnaire(PGQ)to assess the psycho-gastroenterological profile and social characteristics of a pediatric population with and without *** One hundred and nineteen Italian children(age 11-18)were included:28 outpatient patients with DGBI(Rome Iv criteria)and 91 healthy *** filled the PGQ,faces pain scale revised(FPS-R),Bristol stool chart,ga-strointestinal symptoms rating scale,state-trait anxiety inventory,Toronto alexithymia scale 20,perceived self-efficacy in the management of negative emotions and expression of positive emotions(APEN-G,APEP-G),irritable bowel syndrome-quality of life questionnaire,school performances,tobacco use,early life events,degree of *** Compared to controls,patients had more medical examinations(35%of them went to the doctor more than five times),a higher school performance(23%vs 13%,Pver vs 16%,Pvents(28%vs 1%Pvs 7%,Pvalence of early life events,a lower quality of life,more medical examinations rising health care costs,lower anxiety levels.

关键词： Disorders of gut-brain interaction Functional gastrointestinal disorders Psycho-gastroenterological profile Gut-brain axis Rome Iv criteria Pediatric patients

Contribution of the Earth's gravitational potential to variations in orbital motion of short-period comets

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

Research in Astronomy and Astrophysics 2016年第4期16卷 1-6页

作者： valentina M.Chepurova Nelli v.Kulikova Elena N.Petrovskaya Sternberg Astronomical Institute Lomonosov Moscow State University Department of Computer Systems Networks and Technologies National Research Nuclear University Moscow Engineering Physics Institute Institute for Nuclear Power Engineering

We present simulation results on evolution development of orbital motion of short-period comets with the revolution period not exceeding 6-7 years, namely comets 21P/Giacobini-Zinner, 26P/Grigg- Skjellerup and 7P/Pons-Winnecke. The calculations cover the range from the date of the object＇s discovery to 2100. variations in the objects＇ orbital elements under the action of gravity disturbances, taking Earth＇s gravitational potential into account when the small body approaches, are analyzed. Corrected dates of peri- helion passages can be used for scheduling observations.

关键词： comets: individual (21P/Giacobini-Zinner 26P/Grigg-Skjellerup 7P/Pons-Winnecke)-- me-teorites meteors meteoroids

Genotoxic Potential of Copper Oxide Nanoparticles in the Bivalve Mollusk Mytilus trossulus

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2017年第2期16卷 339-345页

作者： victor P.Chelomin valentina v.Slobodskova Maksim Zakhartsev Sergey Kukla Laboratory of Marine Ecotoxicology V.I.Ilichev Pacific Oceanological Institute of the Far East Branch of Russian Academy of SciencesVladivostok 600041Russia The Far Eastern Federal University School of Natural SciencesVladivostok 600091Russia University of Hohenheim Stuttgart 70599Germany

Copper oxide nanoparticles(CuO-NPs) are among the most widely used metal oxide nanoparticles,which increases the chance of their being released into the marine *** the applications of these particles have increased in recent years,their potential impact on the health of marine biota has also ***,the toxicological effects of these NPs in the marine environment are poorly *** the present study,the DNA damaging potential of CuO-NPs in the marine eastern mussel Mytilus trossulus was evaluated and compared to that of dissolved copper *** was assessed by the single cell gel electrophoresis(comet) assay in mussel gill and digestive gland *** results showed that copper in both forms(CuO-NPs and dissolved copper) was accumulated to different extents in mussel *** mussel exposed to the dissolved copper attained higher concentrations of copper in the gills than in the digestive *** contrast to these results,it was found that CuO-NPs could induce much higher copper accumulation in the digestive gland than in the gills.A clear and statistically significant increase in DNA damage was found in both tissues of the Cu-exposed group compared to the control *** results indicated that the CuO-NP exposure produced remarkable effects and increased DNA damage significantly in mussel gill cells *** should be noted that the digestive gland cells were prone to accumulation following CuO-NPs when compared to the gill cells,while the gill cells were more sensitive to the genotoxic effects of *** results also suggested the need for a complete risk assessment of engineered particles before its arrival in the consumer market.

关键词： CuO nanoparticles copper accumulation DNA damage genotoxicity Mytilus trossulus

Evaluation of DNA Damage in the Marine Mussel Crenomytilus grayanus as a Genotoxic Biomarker of Pollution

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2019年第1期18卷 159-164页

作者： SLOBODSKOvA valentina v. ZHURAvEL Elena v. KUKLA Sergey P. CHELOMIN victor P. Laboratory of Marine Ecotoxicology V.I.Ilichev Pacific Oceanological Institute Far Eastern Branch Russian Academy of Sciences School of Natural Sciences Far Eastern Federal University

Marine pollution affects all life processes in aquatic organisms. The genotoxic effect of pollution on the mussel Crenomytilus grayanus was assessed. Bivalves were collected from the ‘clean'(vostochnaya Cove) and polluted(Nakhodka Bay) areas in the Peter the Great Bay. The degree of DNA damage in C. grayanus was determined by alkaline comet assay as mean percentage of DNA in tail, and the genetic damage index was calculated. Our results indicate that almost one-third of DNA in cells of gills and digestive gland of C. grayanus inhabiting the Nakhodka Bay had destructive changes compared to the individuals of this species from the vostochnaya Cove. This study has shown that chronic pollution of the aquatic environment causes destructive changes to DNA in gill and digestive gland cells of C. grayanus.

关键词： genotoxicity DNA comet assay Crenomytilus grayanus pollution

Bartonella infection in asymptomatic horses and donkeys from Tuscany,Central Italy

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2017年第11期10卷 1077-1079页

作者： Edoardo Magni Fabrizio Bertelloni Micaela Sgorbini valentina v.Ebani Department of veterinary Science University of PisaViale Delle Piagge 256124 PisaItaly

Objective: To investigate the occurrence of Bartonella sp. infection in asymptomatic horses and donkeys living in Tuscany, Central ***: Blood samples were collected from 77 horses and 15 donkeys and tested by indirect immunofluorescent test to detect antibodies against Bartonella sp. and by PCR to detect the ***: Fifty-four(58.69%; 95% CI: 47.95%–68.87%) animals, 9 donkeys and 45 horses, were seropositive with antibody titers ranging from 1:64 to 1:512. PCR assays detected 9 horses positive for Bartonella sp. and 3 donkeys for Bartonella henselae genotype ***: The detected sero-prevalence suggests a common and frequent exposure of equids living in Central Italy to bartonellae and PCR results show that Bartonella *** is possible both in horses and donkeys. At the best of our knowledge, this is the first report of Bartonella henselae infection in donkeys.

关键词： Bartonella Horse Donkey PCR Zoonosis

NIR emitting terephthalates(SmxDyyGd1-x-y)2(tph)3(H2O)4 for luminescence thermometry in the physiological range

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

Journal of Rare Earths 2020年第5期38卷 492-497页

作者： Anastasia v.Orlova vladislava Yu.Kozhevnikova Leonid S.Lepnev Alexander S.Goloveshkin Irina M.Le-Deigen valentina v.Utochnikova M.v.Lomonosov Moscow State University 1/3 Leninskye GoryMoscow119991Russian Federation P.N.Lebedev Physical Institute Leninsky prosp.531J9991MoscowRussian Federation A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of SciencesVavilova St.28119991MoscowRussian Federation EvOLED Ltd. 1A-24 Puskina ielaRiga LV-1050Latvia

The first luminescence thermometer based on coordination compound of samarium and dysprosium is repo *** luminescence intensity and high signal resolution are reached thanks to the concentration quenching reduction due to the use of the trimetallic complexes of *** best thermometric properties in a wide temperature range among the studied systems are demonstrated by(Sm0.2Dy0.15Gd0.65)2(tph)3(H2O)*** sensitivity reaches 0.5%/K in visible range and 1.2%/K in NIR range at low temperatures and 0.5%/K and 0.8%/K in physiological range.

关键词： Luminescence Lanthanides Carboxylates Thermometry NIR range Rare earths

Antibiotic resistance in patients with liver cirrhosis:Prevalence and current approach to tackle

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第31期11卷 7530-7542页

作者： valentina Liakina Clinic of Gastroenterology Nephrourology and SurgeryInstitute of Clinical MedicineFaculty of MedicineVilnius UniversityVilnius 01513Lithuania Department of Chemistry and Bioengineering Faculty of Fundamental SciencesVilnius TechVilnius 10223Lithuania

Regardless of etiology,complications with bacterial infection in patients with cirrhosis are reported in the range of 25%-46%according to the most recent *** to frequent episodes of bacterial infection and repetitive antibiotic treatment,most often with broad-spectrum gram negative coverage,patients with cirrhosis are at increased risk of encountering multidrug resistant bacteria,and this raises *** such patients,extended-spectrum beta-lactamase and AmpCproducing Enterobacterales,methicillin-or vancomycin-resistant Staphylococcus aureus,vancomycin-resistant Enterococci,carbapenem-resistant Pseudomonas aeruginosa,and Acinetobacter baumannii,all of which are difficult to treat,are the most *** is why novel approaches to the prophylaxis and treatment of bacterial infections to avoid antibiotic resistance have recently been *** the same time,our knowledge of resistance mechanisms is constantly *** review summarizes the current situation regarding the burden of antibiotic resistance,including the prevalence and mechanisms of intrinsic and acquired resistance in bacterial species that most frequently cause complications in patients with liver cirrhosis and recent developments on how to deal with multidrug resistant bacteria.

关键词： Cirrhosis Bacterial complications Antibiotics Intrinsic resistance Acquired resistance Probiotics vaccines