检索结果-南通市图书馆

A video camera recording method for measuring terminal velocity of seed dispersal by wind

Journal of Forestry Research 2021年第1期32卷 81-90页

作者： Minghu Liu Zhiming Xin Zhi Su Yingming Zhao Xinle Li Zhimin Liu mariano ACony Wei Liang Xuanping Qin Jianqiang Qian Xue Cui Quanlai Zhou Experimental Center of Desert Forestry Chinese Academy of Forestry1 Shiyan LaneTuanjie RoadDengkou 015200People’s Republic of China Institute of Applied Ecology Chinese Academy of Sciences72 Wenhua RoadShenyang 110016People’s Republic of China Instituto Argentino de Investigaciones de las Zonas Aridas-CONICET CC.5075500 MendozaArgentina University of Chinese Academy of Sciences 19 Yuquan RoadBeijing 100049People’s Republic of China Henan Agricultural University 63 Nongye RoadZhengzhou 450002People’s Republic of China Station of Forest and Grassland Pest Control and Quarantine Shenyang 110804Liaoning ProvincePeople’s Republic of China

An accurate and convenient method is essential for measuring the terminal velocity of seeds dispersed by *** and random errors produced by existing methods lower the accuracy and convenience in determining seed terminal *** this study,a video camera was used to record the falling process of forty-one species of wind-borne seed with eight appendage structures and seven aerodynamic behaviors in a settling tower at a speed of 50 frames per second(fps).The videos were analyzed by Quick Time Player to determine seed acceleration height,acceleration time,and terminal *** results showed that acceleration height and time,terminal velocity,and the diff erence between terminal velocity and descent velocity(DTD)increased with wing *** with dropping methods,the camera recording method eliminated the eff ect of acceleration and corrected seed terminal *** on wing loading,release heights were determined for accurate measurement of terminal velocity of diff erent *** method,due to its inexpensive equipment,high accuracy,easy observation and operation,can be applied to measure the terminal velocity of wind dispersed seeds,and provides a promising method in exploring the dispersal process of seeds.

关键词： Acceleration height Acceleration time Settling tower Aerodynamic behavior Appendage structures

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

Silymarin,boswellic acid and curcumin enriched dietetic formulation reduces the growth of inherited intestinal polyps in an animal model

引用

World Journal of Gastroenterology 2020年第14期26卷 1601-1612页

作者： Bruna Girardi Maria Pricci Floriana Giorgio mariano Piazzolla Andrea Iannone Giuseppe Losurdo Mariabeatrice Principi Michele Barone Enzo Ierardi Alfredo Di Leo THD SpA Correggio 42015Italy Gastroenterology Section Department of Emergency and Organ TransplantationUniversity of BariBari 70124Italy

BACKGROUND Some substances of plant origin have been reported to exert an effect in reducing intestinal neoplasm development,especially in animal *** polyposis coli multiple intestinal neoplasia-ApcMin/+is the most studied murine model of genetic intestinal *** To assess whether an enriched nutritional formulation(silymarin,boswellic acid and curcumin)with proven“in vitro”and“in vivo”anti-carcinogenetic properties may prevent inherited intestinal cancer in animal *** Forty adenomatous polyposis coli multiple intestinal neoplasia-ApcMin/+mice were used for the study of cancer *** were divided into two groups:20 assumed standard and 20 enriched *** the 110th d animals were *** each group,four subgroups received intraperitoneal bromodeoxyuridine injection at different times(24,48,72 and 96 h before the sacrifice)in order to assess epithelial ***,we evaluated the following parameters:Intestinal polypoid lesion number and size on autoptic tissue,dysplasia and neoplasia areas by histological examination of the whole small intestine,inflammation by histology and cytokine mRNA expression by real-time polymerase chain reaction,bromodeoxyuridine and TUNEL immunofluorescence for epithelial turnover and apoptosis,***,we performed western blotting analysis for the expression of estrogen alpha and beta receptors,cyclin D1 and cleaved caspase 3 in normal and polypoid *** Compared to standard,enriched diet reduced the total number(203 vs 416)and the mean±SD/animal(12.6±5.0 vs 26.0±8.8;P<0.001)of polypoid *** enriched diet group a reduction in polyp size was observed(P<0.001).Histological inflammation and pro-inflammatory cytokine expression were similar in both *** of low-grade dysplasia(P<0.001)and intestinal carcinoma(IC;P<0.001)were significantly decreased in enriched diet *** was observed in 100%in standard and 85%in enriched formulation assumin

关键词： Intestinal cancer Familial adenomatous polyposis Chemopreventive diet Apc^Min/+mice Boswellia Curcumin

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

Treatment options for localised renal cell carcinoma of the transplanted kidney

引用

World Journal of Transplantation 2020年第6期10卷 147-161页

作者： Gloria Motta mariano Ferraresso Luca Lamperti Dhanai Di Paolo Nicholas Raison Marta Perego Evaldo Favi Urology IRCCS Policlinico San DonatoSan Donato Milanese 27288Italy Renal Transplantation Fondazione IRCCS Ca’Granda Ospedale Maggiore PoliclinicoMilan 20122Italy Department of Clinical Sciences and Community Health University of MilanMilan 20122Italy MRC Centre for Transplantation King’s College LondonLondon WC2R 2LSUnited Kingdom

Currently,there is no consensus among the transplant community about the treatment of renal cell carcinoma(RCC)of the transplanted *** recently,graftectomy was universally considered the golden standard,regardless of the characteristics of the *** to the encouraging results observed in native kidneys,conservative options such as nephron-sparing surgery(NSS)(enucleation and partial nephrectomy)and ablative therapy(radiofrequency ablation,cryoablation,microwave ablation,high-intensity focused ultrasound,and irreversible electroporation)have been progressively used in carefully selected recipients with early-stage allograft *** reports show excellent patient survival,optimal oncological outcome,and preserved renal function with acceptable complication ***,the rarity and the heterogeneity of the disease,the number of options available,and the lack of long-term follow-up data do not allow to adequately define treatment-specific advantages and *** role of active surveillance and immunosuppression management remain also *** order to offer a better insight into this difficult topic and to help clinicians choose the best therapy for their patients,we performed and extensive review of the *** focused on epidemiology,clinical presentation,diagnostic work up,staging strategies,tumour characteristics,treatment modalities,and follow-up *** research confirms that both NSS and focal ablation represent a valuable alternative to graftectomy for kidney transplant recipients with American Joint Committee on Cancer stage T1aN0M0 *** on T1bN0M0 lesions are scarce but suggest extra *** designed multi-centre prospective clinical trials are warranted.

关键词： Renal cell carcinoma Kidney transplant Graftectomy Nephron-sparing surgery Focal ablation Review

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

Does Education Affect Individual Well-Being? Some Italian Empirical Evidences

引用

Open Journal of Statistics 2014年第5期4卷 319-329页

作者： Francesca Giambona mariano Porcu Isabella Sulis Department of Social Sciences and Institution Università degli Studi di Cagliari Viale Sant’Ignazio Cagliari

Using data from the last European Survey on Income and Living Conditions (EU-SILC), this paper focuses on the measurement of well-being and on its association with education. EU-SILC survey gives information on several aspects of people’s daily life (i.e. housing, labour, health, education, finance, material deprivation and possession of durables) allowing a multi-dimensional approach to the study of well-being, poverty and social exclusion. For our aims we have considered only survey data collected in Italy. Due to the multidimensionality of well-being concept, we have selected some variables related principally to four main dimensions of well-being, which are financial endowment, housing conditions and goods possessions, health status, and environment. A first explanatory analysis via multivariate regression model has highlighted the effect of education on the factors considered. Finally, a latent class regression analysis has been used to cluster individuals into mutually exclusive latent classes which identify different intensities of well-being (the latent trait) taking into account the effect of education in the membership probability of each latent class.

关键词： Well-Being Education Latent Class Regression Analysis IRT Multivariate Regression

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

Unmasking the responses of the stem cells and progenitors in the subventricular zone after neonatal and pediatric brain injuries

引用

Neural Regeneration Research 2016年第1期11卷 45-48页

作者： mariano Guardia Clausi Ekta Kumari Steven W.Levison Department of Pharmacology Physiology and Neuroscience Rutgers-New Jersey Medical School

There is great interest in the regenerative potential of the neural stem cells and progenitors that populate the subventricular zone（SVZ）. However, a comprehensive understanding of SVZ cell responses to brain injuries has been hindered by the lack of sensitive approaches to study the cellular composition of this niche. Here we review progress being made in deciphering the cells of the SVZ gleaned from the use of a recently designed flow cytometry panel that allows SVZ cells to be parsed into multiple subsets of progenitors as well as putative stem cells. We review how this approach has begun to unmask both the heterogeneity of SVZ cells as well as the dynamic shifts in cell populations with neonatal and pediatric brain injuries. We also discuss how flow cytometric analyses also have begun to reveal how specific cytokines, such as Leukemia inhibitory factor are coordinating SVZ responses to injury.

关键词： CNS regeneration cytokines glial progenitors gliogenesis inflammation cerebral palsy traumatic brain injury stroke

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

There is life after coking for Ir nanocatalyst superlattices

引用

Nano Research 2022年第8期15卷 6969-6976页

作者： Antonio J.Martínez-Galera Haojie Guo mariano D.Jiménez-Sánchez Stefano Franchi Kevin C.Prince José M.Gómez-Rodríguez Departamento de Física de la Materia Condensada Universidad Autónoma de MadridMadrid E-28049Spain Instituto Nicolás Cabrera Universidad Autónoma de MadridMadrid E-28049Spain Elettra-Sincrotrone Trieste S.C.p.A. in Area Science ParkBasovizza(Trieste)34149Italy Condensed Matter Physics Center(IFIMAC) Universidad Autónoma de MadridMadrid E-28049Spain

Achieving superior performance of nanoparticle systems is one of the biggest challenges in *** major phenomena,occurring during the reactions,hinder the development of the full potential of nanoparticle catalysts:sintering and contamination with carbon containing species,sometimes called ***,we demonstrate that Ir nanocrystals,arranged into periodic networks on hexagonal boron nitride(h-BN)supports,can be restored without sintering after contamination by persistent *** restoration yields the complete removal of carbon from the nanocrystals,which keep their crystalline structure,allowing operation without *** findings,together with the possibility of fine tuning the nanocrystals size,confer this nanoparticle system a great potential as a testbed to extract key information about catalysis-mediated oxidation *** the case of the CO oxidation by O2,reaction of interest in environmental science and green energy production,the existence of chemical processes not observed before in other nanoparticle systems is demonstrated.

关键词： catalysis coke nanoparticles scanning tunneling microscopy(STM) X-ray photoemission spectroscopy(XPS)

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

Letter to the Editor concerning:Gallbladder perforation:A single-center experience in north India and a step-up approach for management

引用

Hepatobiliary & Pancreatic Diseases International 2022年第6期21卷 617-618页

作者： Hermilo Jeptef Angeles-Mar mariano Garcia-Camp RodrigoEnrique Elizondo-Omaña Santos Guzmán-López Javier Humberto Martinez-Garza Alejandro Quiroga-Garza Universidad Autonoma de Nuevo Leon School of MedicineHuman Anatomy DepartmentMonterreyNuevo León CP 64460México Universidad Autonoma de Nuevo Leon School of MedicinePlataforma INVEST-KER Unito Mayo Clinic(KER Unit Mexico)MonterreyNuevo LeónMéxico General Surgery Division Instituto Mexicano del Seguro SocialMonterreyNuevo LeónMéxico

To the Editor:We sincerely applaud the work done by Gupta et al.,in which they analyzed a single-center experience regarding gallbladder per-foration(GBP)management[1].Currently,there is a lack of cohort studies to adequately describe the approach strategies and man-agement for this pathology,with international guidelines making ambiguous recommendations[2,3].Their study stratified GBP types and provided details regarding clinical presentation,comorbidities,preoperative diagnosis,etiology,imaging techniques,and surgical *** study reported a high conversion rate when a la-paroscopic approach was attempted for cholecystectomy.

关键词： diagnosis concerning approach

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

The cold-induced factor CBF3 mediates root stem cell activity,regeneration,and developmental responses to cold

引用

Plant Communications 2023年第6期4卷 197-211页

作者： Pablo Perez-Garcia Ornella Pucciariello Alvaro Sanchez-Corrionero Javier Cabrera Cristina del Barrio Juan Carlos del Pozo mariano Perales Krzysztof Wabnik Miguel A.Moreno-Risueno Centro de Biotecnologíay Genómica de Plantas(Universidad Politécnica de Madrid(UPM)–Instituto Nacional de Investigacióny Tecnología Agraria y Alimentaria–CSIC(INIA-CSIC)) MadridSpain

Plant growth and development involve the specification and regeneration of stem cell niches(SCNs).Although plants are exposed to disparate environmental conditions,how environmental cues affect developmental programs and stem cells is not well *** stem cells are accommodated in meristems in SCNs around the quiescent center(QC),which maintains their *** a combination of genetics and confocal microscopy to trace morphological defects and correlate them with changes in gene expression and protein levels,we show that the cold-induced transcription factor(TF)C-REPEAT BINDING FACTOR 3(CBF3),which has previously been associated with cold acclimation,regulates root development,stem cell activity,and ***3 is integrated into the SHORT-ROOT(SHR)regulatory network,forming a feedback loop that maintains SHR ***3 is primarily expressed in the root endodermis,whereas the CBF3 protein is localized to other meristematic tissues,including root *** of cbf3-1 using a wild-type CBF3 gene and a CBF3 fusion with reduced mobility show that CBF3 movement capacity is required for SCN patterning and regulates root ***,cold induces CBF3,affecting QC ***,exposure to moderate cold around 10℃–12℃promotes root regeneration and QC respecification in a CBF3-dependent manner during the recuperation *** contrast,CBF3 does not appear to regulate stem cell survival,which has been associated with recuperation from more acute cold(-4℃).We propose a role for CBF3 in mediating the molecular interrelationships among the cold response,stem cell activity,and development.

关键词： stem cells regeneration organ patterning protein movement cell fate low temperature

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

Computer-aided sperm analysis： a useful tool to evaluate patient＇s response to varicocelectomy

引用

Asian Journal of Andrology 2017年第4期19卷 449-452页

作者： Julia I Ariagno Gabriela R Mendeluk Maria J Furlan M Sardi P Chenlo Susana M Curi Mercedes N Pugliese Herberto E Repetto mariano Cohen Clinical Biochemistry Department Male Fertility Laboratory Faculty of Pharmacy and Biochemetry University of Buenos Aires Argentina Urology Department "Jose de San Martin" Clinical Hospital University of Buenos Aires Buenos Aires Argentina (CP1120)

Preoperative and postoperative sperm parameter values from infertile men with varicocele were analyzed by computer-aided sperm analysis （CASA） to assess if sperm characteristics improved after varicocelectomy. Semen samples of men with proven fertility （n = 38） and men with varicocele-related infertility （n = 61） were also analyzed. Conventional semen analysis was performed according to WHO （2010） criteria and a CASA system was employed to assess kinetic parameters and sperm concentration. Seminal parameters values in the fertile group were very far above from those of the patients, either before or after surgery. No significant improvement in the percentage normal sperm morphology （P = 0. 10）, sperm concentration （P = 0.52）, total sperm count （P = 0.76）, subjective motility （%）（P = 0.97） nor kinematics （P = 0.30） was observed after varicocelectomy when all groups were compared. Neither was significant improvement found in percentage normal sperm morphology （P = 0.91）, sperm concentration （P =0. 10）, total sperm count （P = 0.89） or percentage motility （P = 0.77） after varicocelectomy in paired comparisons of preoperative and postoperative data. Analysis of paired samples revealed that the total sperm count （P = 0.01） and most sperm kinetic parameters： curvilinear velocity （P = 0.002）, straight-line velocity （P = 0.0004）, average path velocity （P = 0.0005）, linearity （P = 0.02）, and wobble （P = 0.006） improved after surgery. CASA offers the potential for accurate quantitative assessment of each patient＇s response to varicocelectomy.

关键词： computer-assisted semen analysis male infertility semen analysis varicocele varicocelectomy

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

A Shell Model Mass Formula for Exotic Light Nuclei

引用

Journal of Physical Science and Application 2012年第8期2卷 306-314页

作者： mariano Bauer Hugo Garcfa Tecocoatzi Cristian Mojica lnstituto de Fisica Universidad Nacional Autonoma de Mexieo Mexico D.F. O1000 Mexico Instituto de Ciencias Nucleares Universidad Nacional Autonoma de Mexico Mexico D.F. 01000 Mexico

An analytic phenomenological shell model mass formula for light nuclei is constructed. The formula takes into account the non locality of the self consistent single particle potential and the special features of light nuclei, namely：（a） charge and mass distributions are closer to a Gaussian shape than to the shape characteristic in medium and heavy nuclei; （b） the central charge and mass densities are larger than, and decrease towards, the ＂asymptotic＂ values that are the reference parameters for nuclear matter; and （c） after a shell closure, the next level has a larger orbital angular momentum and a noticeably larger mean square radius. Only then a good numerical fit is obtained with parameters consistent with optical model analysis and empirical spin-orbit couplings. A correlation between the ＂skin effect＂ and the symmetry dependence of the optical potential is established. Towards the neutron drip line the potential well depth, the spin-orbit splitting of the single particle levels and the gap between major shells decrease, as has been observed. The ensuing shift and contraction of the single particle level scheme may lead to：（a） to strong configuration mixing and new magic numbers, and （b） the onset of the halo effect, to avoid the expulsion of single particle levels to the continuum.

关键词： Light nuclei features shell model mass formula skin effect halo effect.

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

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：