检索结果-南通市图书馆

Roles of eIF5A in the immunosurveillance of cellular senescence

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cancer Biology & Medicine 2022年第11期19卷 1523-1527页

作者： Xiangli Jiang fabricio Loayza-Puch Department of Thoracic Oncology Tianjin Medical University Cancer Institute&HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin's Clinical Research Center for CancerTianjin 300060China Translational Control and Metabolism German Cancer Research Center(DKFZ)Heidelberg 69120Germany

Senescence is a cellular stress response program that prevents the proliferation of oncogenically activated, genetically unstable, and/or damaged cells. Senescence was first described in 1961, when normal cultured human fibroblasts were found to enter irreversible growth arrest after multiple cell divisions, in a process known as replicative senescence1. Several types of senescence have since been identified, such as stress-induced senescence, oncogene-induced senescence, and virus-induced senescence. Despite having distinct features due to their different triggers, senescent cells share several key features.

关键词： unstable SASP senescence

Impact of Cascade Disconnection of Distributed Energy Resources on Bulk Power System Stability:Modeling and Mitigation Requirements

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2023年第2期11卷 412-420页

作者： fabricio Andrade Mourinho Tatiana Mariano Lessa Assis Electrical Engineering Department of the Federal University of Rio de Janeiro(COPPE/UFRJ) Rio de JaneiroRJBrazil

This work presents a new approach to establishing the minimum requirements for anti-islanding protection of distributed energy resources(DERs)with focus on bulk power system *** proposed approach aims to avoid cascade disconnection of DERs during major disturbances in the transmission network and to compromise as little as possible the detection of real islanding *** proposed approach concentrates on the rate-of-change of frequency(RoCoF)protection function and it is based on the assessment of dynamic security regions with the incorporation of a new and straightforward approach to represent the disconnection of DERs when analyzing the bulk power system ***,the impact of disconnection of DERs on the Brazilian Interconnected Power System(BIPS)stability is analyzed,highlighting the importance of modeling such disconnection in electromechanical stability studies,even considering low penetration levels of ***,the proposed approach is applied to the BIPS,evidencing its benefits when specifying the minimum requirements of anti-islanding protection,without overestimating them.

关键词： Anti-islanding protection bulk power system stability distributed energy resource(DER) dynamic security region(DSR)

On the numerical solution to the truncated discrete SPH formulation of the hydrostatic problem

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2020年第4期32卷 699-709页

作者： Pablo Eleazar Merino-Alonso fabricio Macia Antonio Souto-Iglesias Mathematical Modeling Analysisand Simulation Applied to Engineering Research Group(M2ASAI)Universi dad politecnica de Madrid(UPM)School of marine engineering(ETSIN)MadridSpain Marine and Hydrodynamical Model Basin Research Group(CEHINAV) Universidad Politecnica de Madrid(UPM)School of Marine Engineering(ETSIN)MadridSpain

The aim of this work is to study the solution of the smoothed particle hydrodynamics(SPH)discrete formulation of the hydrostatic problem with a free *** problem,in which no time dependency is considered,takes the form of a system of linear *** particular,the problem in one dimension is *** focus is set on the convergence when both the particle spacing and the smoothing length tend to zero by keeping constant their *** of this ratio of the order of one,corresponding to a limited number of neighbors,are of practical ***,the problem in which each particle has one single neighbor at each side is *** explicit expressions of the numerical solution and the quadratic error are provided in this *** expression of the quadratic error demonstrates that the SPH solution does not converge to the exact one in general under the specified *** this case,the error converges to a residue,which is in general large compared to the norm of the exact *** cases with two and three neighbors are also *** analytical study in the case of two neighbors is performed,showing how the kernel influences the accuracy of the solution through modifying the condition number of the referred system of linear *** addition to that,a numerical investigation is carried out using several Wendland kernel *** two and three neighbors are involved it is found that the error tends in most cases to a small limiting value,different from zero,while divergent solutions are also found in the case of two neighbors with the Wendland Kernel *** cases with more neighbors are also *** general,the Wendland Kernel C2 turns out to be the worst choice,as the solution is divergent for certain values of the ratio between the particle spacing and the smoothing length,associated with an ill-conditioned matrix.

关键词： Smoothed particle hydrodynamics(SPH) convergence water-at-rest problem hydrostatic tank,free surface kernel truncation

Yet Another Intelligent Code-Generating System： A Flexible and Low-Cost Solution

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 Computer Science & Technology 2018年第5期33卷 940-965页

作者： Joao fabricio Filho Luis Gustavo Araujo Rodriguez Anderson Faustino da Silva Department of Informatics State University of Maringd Maringd-PR 87020-900 Brazil Federal University of Technology -- Parand Campo Mourao-PR 87301-899 Brazil

Modern compilers apply various code transformation algorithms to improve the quality of the target code. However, a complex problem is to determine which transformation algorithms must be utilized. This is difficult because of three reasons： a number of transformation algorithms, various combination possibilities, and several configuration possibil- ities. Over the last few years, various intelligent systems were presented in the literature. The goal of these systems is to search for transformation algorithms and thus apply them to a certain program. This paper proposes a flexible, low-cost and intelligent system capable of identifying transformation algorithms for an input program, considering the program＇s specific features. This system is flexible for parameterization selection and has a low-computational cost. In addition, it has the capability to maximize the exploration of available computational resources. The system was implemented under the Low Level Virtual Machine infrastructure and the results indicate that it is capable of exceeding, up to 21.36%, performance reached by other systems. In addition, it achieved an average improvement of up to 17.72% over the most aggressive compiler optimization level of the Low Level Virtual Machine infrastructure.

关键词： compiler code transformation iterative compilation knowledge representation machine learning

Discovery of the marine Eocene in the northern South China Sea

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2019年第5期6卷 881-886页

作者： Zhimin Jian Haiyan Jin Michael A Kaminski fabricio Ferreira Baohua Li Pai-Sen Yu State Key Laboratory of Marine Geology Tongji University Geosciences Department King Fahd University of Petroleum and Minerals Institute for Geosciences Universidade Federal Fluminense Nanjing Institute of Geology and Paleontology Chinese Academy of Sciences Applied Research Laboratories(NARLabs) Taiwan Ocean Research Institute(TORI)

The nature of the Eocene stratigraphy of the South China Sea (SCS) has been a mystery for *** the southern SCS, the Eocene system with marine deposits is often considered as representing part of the ‘Proto-South Chin... 详细信息

关键词： SCS Sr Discovery of the marine Eocene in the northern South China Sea China

Novel preoperative strategies to improve hepatocellular carcinoma resectability

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2023年第1期12卷 140-141页

作者： Francisco Tustumi fabricio Ferreira Coelho Paulo Herman Department of Gastroenterology Universidade de São PauloSao PauloBrazil Department of Surgery Hospital Israelita Albert EinsteinSao PauloBrazil

Peng et al.(1)performed a pretty interesting article,reporting the proposal of a new strategy to improve resectability for hepatocellular carcinoma(HCC).Their findings are *** strategies to improve liver resection are methods for promoting future liver remnant(FLR)growth in a timely manner before cancer *** main strategies are portal vein embolization(PVE)and associating liver partition and portal vein ligation for staged hepatectomy(ALPPS).

关键词： hepatocellular liver

Tree structure and diversity of lowland Atlantic forest fragments：comparison of disturbed and undisturbed remnants

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 Forestry Research 2016年第3期27卷 605-609页

作者： fabricio Alvim Carvalho Joao Marcelo Alvarenga Braga Marcelo Trindade Nascimento Departamento de Botanica Universidade Federal de Juiz de Fora. Campus Universitario s/n Sao PedroJuiz de Fora-MG 36036-900 Brazil Instituto de Pesquisas do Jardim Botanico do Rio de Janeiro. Rio de Janeiro-RJ Brazil Laboratorio de Ciencias Ambientais CBB Universidade Estadual do Norte Fluminense Campos dos Goytacazes-RJ 28013-602 Brazil

This study describes the tree community structure of three moist lowland Atlantic Forest fragments in Rio de Janeiro State, southeastern Brazil. Two fragments were disturbed and an undisturbed one was used as reference. Our hypothesis was that disturbed fragments show distinct structural patterns in comparison with undisturbed stands due to past disturbance practices and forest fragmentation. Four 100 ×5 m sampling plots were demarcated in each fragment and all live and dead trees with DBH C 5 cm were located, measured and identified. The results supported our hypothesis, due to the high values found for standing dead trees, an increase of dominance of a few pioneer species, lower values of large trees and species richness in disturbed fragments in comparison with the undisturbed one. The advanced fragmentation process in the Southern Brazilian lowland areas and the high species richness in undisturbed areas highlight these forest fragments as priority areas for conservation and management.

关键词： Phytosociology Tree community Forestfragmentation . Hotspot Brazil

Species composition and diversity of woody communities along an elevational gradient in tropical Dwarf Cloud Forest

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2021年第6期18卷 1489-1503页

作者： Breno MOREIRA Pedro Manuel VILLA Carlos Mariano ALVEZ-VALLES fabricio Alvim CARVALHO Botanical Garden Federal University of Juiz de ForaJuiz de Fora36045-500Brazil Department of Forest Engineering Federal University of ViçosaViçosa36570-900Brazil Department of Veterinary Medicine National University Major of San MarcosPucallpa25001Peru Departament of Botany Federal University of Juiz de ForaJuiz de Fora36036-900 Brazil

Elucidating woody community diversity and structure change along environmental gradients is still a central issue of tropical forest ecology. We have evaluated changes in alpha and beta diversity, community composition and structure of woody communities along an elevational gradient in Dwarf Cloud Forests, Southeast Brazil. We selected five areas along an elevational gradient(1,300-1,600 m asl), and randomly allocated 10 plots(10 m × 20 m) in each area in the Ibitipoca State Park(ISP), Serra da Mantiqueira, southeastern Brazil. All woody species(diameter at breast height ≥ 5.0 cm) were collected for taxonomic identification. Thus, we analysed the woody communities based on a phytosociological approach. Overall, 147 species and 37 families were recorded, distributed in 2,303 individuals. No differences in the species richness pattern were observed between areas using the rarefaction and extrapolation curves. Significant differences in species composition and structure between areas were observed. The high beta diversity observed, corroborated by the Jaccard coefficient, increases with decreasing altitude. Our results showed that woody communities in the studied Dwarf Cloud Forests have a higher diversity and structural variability along elevational gradient.

关键词： Atlantic Forest Forest structure Ibitipoca State Park Serra da Mantiqueira

Daily expression of sodium-dependent glucose cotransporter-1protein in jejunum during rat ontogeny

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2019年第3期5卷 290-296页

作者： Juan I.Baston fabricio D.Cid Enrique Caviedes-Vidal Juan G.Chediack Laboratorio de Fisiopatología Endometrial Instituto de Biología y Medicina Experimental(IByME)CONICETCiudad Autoonoma de Buenos AiresC1428ADNArgentina Laboratorio de Biología Integrativa“Prof.E.Caviedes Codelia” Facultad de QuímicaBioquímica y FarmaciaUniversidad Nacional de San LuisSan LuisD5700HHWArgentina Instituto Multidisciplinario de Investigaciones en Biología-San Luis(IMIBIO-SL CCT-SL)CONICETSan Luis D5700HHWArgentina

It is widely known that intestinal capacities such as the enzymatic hydrolysis of carbohydrates,lipids and proteins,and the subsequent absorption of the hydrolyzed *** evolutionary matched to dietary loads and feeding *** this study,we demonstrate that the protein expression of apically located sodium-dependent glucose cotransporter-1(SGLT-1)throughout rat ontogeny is daily adjusted to afford glucose uptake when the load of this metabolically essential monosaccharide in the intestinal lumen is *** jejunal expression of SGLT-1 protein in 14 one-day-old suckling pups was found to increase at dark and early light phase(P<0.05).when they have a better access to mother *** weaning21-d-old and juvenile 28-d-old rats,the cotransporter expression was high throughout the entire day(P<0.05).Finally,adult 90-d-old rats showed a well-developed circadian rhythm for SGLT-1 protein(P<0.05).whose expression increased at late light and dark phase when the highest intestinal glucose load was *** our knowledge,these results are the first reporting the daily profile of SGLT-1 expression during rat early developmental stage and may contribute to understand the biological significance of a well-established molecular capacity to deal with the crucial increase of glucose load in the diet during the weaning process.

关键词： Intestinal SGLT-1 Protein expression Daily rhythms Ontogeny Rat