检索结果-南通市图书馆

Journal of Foreign Languages and Cultures 2021年第2期5卷 33-38,156页

作者： carlos Mendoza-Alvarez Boston College

This essay analyzes the phenomenon of clandestine graves of missing persons in Mexico as a social,political,and philosophical problem,where theological clues are *** the contributions of decolonial thought this reflection seeks to think the absence and,within it,to think the emergence of an alternative world promoted by the just people of history with the resistances they create to live the present with dignity and hope.

关键词： missing people resistances survivors messianic times

Effect of Exogenous Melatonin on Seed Germination and Seedling Growth in Melon(Cucumis melo L.) Under Salt Stress

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Horticultural Plant Journal 2019年第2期5卷 79-87页

作者： José Luis Casta?ares carlos Alberto Bouzo Plant Physiology Laboratory Department of Basic Sciences Universidad Nacional de Luján Laboratory of Research in Physiology and Plant Molecular Biology Facultad de Ciencias Agrarias Universidad Nacional del Litoral

An investigation was carried out to evaluate the effect of different application forms and concentrations of melatonin on germination and initial growth of melon plants in several different salinity conditions. We evaluated germination percentage and growth of seedlings and measured total chlorophyll content, relative electrolyte leakage, peroxidase activity, root viability, proline concentration, relative water content,Na^+/K^+ratio in green parts and K^+leakage from roots. Seed germination percentage under salt stress increased with treatments of 10 and50 μmol·L^(-1) melatonin. Seed treatment and plant watering with melatonin at 50 μmol·L^(-1) improved growth parameters and plants showed higher chlorophyll content as well as better biochemical parameters than non-treated plants. Results suggest that melatonin can alleviate the effect of salt stress during seed germination and first stages of plant development.

关键词： melon melatonin salt stress germination antioxidation

The labyrinth of nuclear reprogramming

在线全文

学校读者我要写书评

暂无评论

Journal of Molecular Cell Biology 2011年第6期3卷 327-329页

作者： Ignacio Sancho-Martinez Emmanuel Nivet Juan carlos Izpisua Belmonte Gene Expression Laboratory Salk Institute for Biological Studies10010 North Torrey Pines RoadLa JollaCA 92037USA Center for Regenerative Medicine in Barcelona Dr Aiguader 88Barcelona 08003Spain

Human embryonic stem cells(ESCs)have the capability to differentiate into all somatic cell types,a process that recapitu-lates the early stages of human ***,the use of ESCs raises several controversies,particularly concern-ing the ethical dilemma regarding the use of human embryonic material and the need for embryo *** discov-ery of induced pluripotent stem cell(iPSC)technology in 2006(Takahashi and Yamanaka,2006)opened the door for possible application of pluripotent stem-cell-related therapies in the clinic as well as for the generation of patient-derived pluripotent stem cells suitable for disease modeling in vitro.

关键词： programming destruction opened

Linking morphological and ecophysiological leaf traits to canopy dieback in Persian oak trees from central Zagros

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 2019年第5期30卷 1755-1764页

作者： Ahmad Hosseini Seyed Mohsen Hosseini Juan carlos Linares Department of Natural Resources AREEOIlam Agricultural and Natural Research and Education CenterIlam 69317-73835Iran Faculty of Natural Resources&Marine Sciences Tarbiat Modares UniversityNoorMazandaran 46417-76489Iran Department of Physical Chemical and Natural SystemsUniversity Pablo de OlavideCarretera de Utrera Km 141013 SevilleSpain

Intraspecific variability in morphological and ecophysiological leaf traits might be theorized to be present in declining populations,since they seem to be exposed to stress and plasticity could be *** we focused on declining Persian oaks(Quercus brantii ***(Jaub and Spach)Zohary)in the Zagros Mountains of western Iran,representing the most important tree species of this *** selected trees with contrasting crown dieback,from healthy to severely defoliated,to investigate the relationships between canopy dieback and leaf morphology,water content and *** also measured esterase and peroxidase,as enzymatic antioxidants and indicators of contrasting *** showing moderate to severe defoliation showed higher leaf mass area(LMA),reduced relative water content(RWC),and lower stomatal density(SD).Increasing LMA indicates a more sclerophyllic structure,according to drier *** did not find significant differences in leaf pigments(chlorophyll a and b,and carotenoids)among crown dieback classes,suggesting that Persian oak trees are able to maintain accurate photochemical efficiency,while reduced RWC and SD suggest hydraulic *** results do not provide a consistent pattern as regards enzymatic antioxidant defense in Persian *** leaf traits would be important drivers of future adaptive evolution in Persian oak,leading to smaller and thicker leaves,which have fitness benefits in dry ***,drought responses may be critically affecting carbon uptake,as photosynthetic compounds are less effectively used in leaves with higher sclerophylly.

关键词： Crown dieback Drought Leaf mass area Oak decline Quercus brantii Stomatal density Sclerophylly

Prevalence of musculoskeletal injuries and a proposal for neuromuscular training to prevent lower limb injuries in Brazilian Army soldiers:an observational study

在线全文

学校读者我要写书评

暂无评论

Military Medical Research 2019年第1期6卷 45-52页

作者： Michele Zukauskas de Andrade Gomes carlos Eduardo Pinfildi Department of Human Movement Science Federal University of Sao Paulo(UNIFESP)Campus Baixada Santista Human Movement Science and Rehabilitation Department of Human Movement ScienceFederal University of Sao Paulo-Physical TherapyCampus Baixada Santista

Background: The activities carried out by soldiers in the army involve great physical demands and require intense trainings to perform combat-specific tasks. Musculoskeletal injury is a potential threat to the health and physical integrity of the soldier. This study aimed to evaluate the prevalence of lower limb musculoskeletal injuries among soldiers and to propose a training protocol to prevent the most frequent ***: This observational(cross-sectional) study recruited a sample of 103 soldiers who required medical attention,from a total 202 new battalion soldiers. The medical records(paper and online) had a form of running text. All data collected were recorded by the registered physicians of the battalion medical post. The records were analyzed by the following variables: medical diagnosis, injury site, mechanism, type of treatment, time loss, existence of previous injury,and recurring ***: A total of 112 musculoskeletal injuries were diagnosed in 71 soldiers, and other types of diseases/injuries were diagnosed in the other soldiers. Joint pain accounted for 55.4% of the diagnoses. The knee was the most affected site, while trauma and overload were the most common mechanisms of injury. Drug treatment was used most frequently, accounting for 58% of the cases. The majority of the sample obtained a temporary leave of absence for1 to 6 days or not at all. Previous injuries and recurrence were not presented as risk factors for injury. With the data received, a protocol for the prevention of injuries to the lower limbs was ***: This study indicated that the most frequent site of injury is the knee, and joint pain is the most common diagnosis. These results may support the necessity to develop a neuromuscular training protocol to prevent lower limb injuries, which we suggest to be applied in future studies.

关键词： Physical therapy Wounds and injuries Primary prevention Lower extremity Proprioception Military personnel

FAST SPECTRAL GALERKIN METHOD FOR LOGARITHMIC SINGULAR EQUATIONS ON A SEGMENT＊

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2018年第1期36卷 128-158页

作者： carlos Jerez-Hanckes Serge Nicaise Carolina Urzua-Torres School of Engineering Pontificia Universidad Catolica de Chile 782-0436 Santiago Chile. LAMAV Universite de Valenciennes and CNRS 59313 Valenciennes France. Seminar for Applied Mathematics ETH Zurich Raemistrasse 101 8092 Zurich Switzerland.

We present a fast Galerkin spectral method to solve logarithmic singular equations on segments. The proposed method uses weighted first-kind Chebyshev polynomials. Conver- gence rates of several orders are obtained for fractional Sobolev spaces H^-1/2 （or H00^-l/2）. Main tools are the approximation properties of the discretization basis, the construction of a suitable Hilbert scale for weighted L2-spaces and local regularity estimates. Numerical experiments are provided to validate our claims,

关键词： Screen problems Boundary integral operators Spectral methods.

Fabrication and testing of polymer-based capacitive micromachined ultrasound transducers for medical imaging

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2018年第1期4卷 178-189页

作者： carlos D.Gerardo Edmond Cretu Robert Rohling Department of Electrical and Computer Engineering University of British Columbia2332 Main MallVancouverBCCanada Department of Mechanical Engineering University of British Columbia6250 Applied Science LnVancouverBCCanada

The ultrasonic transducer industry is dominated by piezoelectric *** an emerging alternative,capacitive micromachined ultrasound transducers(CMUTs)offer wider bandwidth,better integration with electronics,and ease of fabricating large *** have a sealed cavity between a fixed electrode and a suspended metalized *** cost and sensitivity are limiting factors in current CMUTs that depend on the fabrication equipment and,especially,on the materials *** widespread use of CMUTs,a much lower fabrication cost that uses inexpensive materials,which maintain or improve upon existing sensitivity,is ***,a new fabrication process is described for polymer-based CMUTs(polyCMUTs)using the photopolymer SU-8 and *** first ultrasound B-mode image of a wire phantom created with a 64-element linear array using synthetic aperture beamforming techniques is presented.A 12 VAC signal superimposed on a 10 VDC signal was used on the transmission side,and only a bias-tee,with no amplifiers,was used on the receiving *** low operational voltage and high sensitivity of this device can be partially attributed to a pre-biasing condition on the *** using a novel sacrificial layer combined with a top electrode embedded inside the membrane,we demonstrated that SU-8 can be used to manufacture CMUTs ***,the fabrication used relatively simple equipment,and the number of fabrication steps was reduced compared to traditional CMUT *** new fabrication process has the potential to increase the use of CMUTs in the ultrasound market,including the market for wearable transducers.

关键词： polymer electrode testing

A Note on Extreme Points in Dual Spaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2013年第3期29卷 471-476页

作者： Juan Francisco MENA-JURADO Juan carlos NAVARRO-PASCUAL Departamento de Análisis Matemático Facultad de Ciencias Universidad de Granada Departamento de lgebra y Análisis Matemático Universidad de Almería

Given a normed space X it can be easily proven that every extreme point in Bx＊, the unit ball of X＊, is the restriction of an extreme point in Bx Our purpose is to study when the restrictions of extreme points in B... 详细信息

关键词： Extreme point Ll-predual M-ideal

Management of hypertensive crises in the elderly

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2018年第7期15卷 514-522页

作者： Abbas Alshami carlos Romero America Avila Joseph Varon Dorrington Medical Associates Houston Texas USA University of Baghdad/College of Medicine Baghdad Iraq Universidad Autonoma de San Luis Potosi San Luis Potosi Mexico Universidad Durango Santander Hermosillo Sonora Mexico The University of Texas Health Science Center at Houston USA The University of Texas Medical Branch at Galveston USA Critical Care Services United Memorial Medical Center / United General Hospital Houston Texas USA

Hypertensive crises are elevations of blood pressure higher than 180/120 mmHg. These can be urgent or emergent, depending on the presence of end organ damage. The clinical presentation of hypertensive crises is quite variable in elderly patients, and clinicians must be suspicious of non-specific symptoms. Managing hypertensive crises in elderly patients needs meticulous knowledge of the pathophysiological changes in them, pharmacological options, pharmacokinetics of the medications used, their side effects, and their interactions with other medications. Clevidipine, nicardipine, labetalol, esmolol, and fenoldopam are among the preferred choices in the elderly due to their efficacy and tolerability. Nitroprusside, hydralazine, and nifedipine should be avoided, unless there are no other options available, due to the high risk of complications and unpredictable responses.

关键词： Beta-blockers Calcium channel blockers Clevidipine Elderly Esmolol Fenoldopam Hypertensive crises Labetalol Nicardipine Nitroprusside

Natural organic matter quantification in the waters of a semiarid freshwater wetland (Tablas de Daimiel, Spain)

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2013年第1期25卷 114-123页

作者： Montserrat Filella Juan carlos Rodríguez-Murillo Franc ois Quentel Institute F.-A. Forel University of Geneva10 route de SuisseCH-1290 Versoix Switzerland Museo Nacional de Ciencias Naturales CSICSerrano 115 E-28006 MadridSpain Laboratoire de Chimie Analytique UMR-CNRS 6521 Universit de Bretagne Occidentale6 avenue V.Le GorgeuCS 93837F-29238 Brest Cedex 3France

Dissolved organic matter （DOM） concentrations have been measured in the waters of a semiarid freshwater wetland, the Tablas de Daimiel, Spain, when the system-characterised by variable hydroperiodicity conditions, was completely flooded （February 2011）. Fluxes of DOM from the wetland soils to the overlying waters were measured by using a passive diffusion sampler （peeper）. Not only dissolved organic carbon （DOC） concentrations were measured but refractory organic matter （ROM, usually known as humic substances） was also quantified using a novel voltammetric method. Fluorescence spectra were recorded to help in selecting the appropriate standard for ROM quantification, test the homogeneity of DOM in the waters and get an indication of their source. The results obtained show a 7-fold increase in measured ROM concentrations from the Gigtiela River to the outlet, which points to a net exportation of ROM from the wetland and to the existence of an internal source of ROM in the system, probably diffusion from the wetland soils. This hypothesis is confirmed by the flux of ROM from the soils to the water column measured with the peeper and by the common fluorescence characteristics of colunm and interstitial waters. The smaller increase in DOC concentrations along the wetland, in spite of the higher DOC fluxes from soils, suggests that there is significant turnover of organic carbon （OC） in the water column. The system acts as a major carbon sink but, when flooded, exports .OC as DOM.

关键词： organic carbon natural organic matter refractory organic matter DOC ROM humic wetland Daimiel