检索结果-南通市图书馆

A comprehensive study of the proteins involved in salinity stress response in roots and shoots of the FL478 genotype of rice(Oryza sativa L. ssp. indica)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Crop Journal 2021年第5期9卷 1154-1168页

作者： Camilo lopez-Cristoffanini Mireia Bundo Xavier Serrat Blanca San Segundo Marta lopez-Carbonell Salvador Nogues Departament de Biologia Evolutiva Ecologia i Ciències AmbientalsSeccio de Fisiologia VegetalUniversitat de Barcelona08028 BarcelonaSpain Centre for Research in Agricultural Genomics(CRAG) CSIC-IRTA-UAB-UBEdifici CRAGCampus de la UAB08193 BellaterraBarcelonaSpain Consejo Superior de Investigaciones Científicas(CSIC) BarcelonaSpain

Rice,a major staple,is the most salt-sensitive *** salinity triggers several adaptive responses in rice to cope with osmotic and ionic stress at the physiological,cellular,and molecular levels.A major QTL for salinity tolerance,named Saltol,is present on chromosome 1 of Indian landraces such as Pokkali and Nona *** early proteomic and physiological responses to salinity in roots and shoots of FL478,an inbred rice line harboring the Saltol QTL,were *** were cultured in hydroponic cultures with 100 mmol L^(-1) Na Cl and evaluated at 6,24,and 48 *** the physiological level,root length significantly increased at 48 h,whereas shoot length was *** Na^(+)/K^(+) ratio was maintained at lower levels in shoots than in roots,suggesting that roots play a protective *** than 2000 proteins were detected in both *** showed a faster and more coordinated proteomic response than shoots,evident after only 6 h of *** responses showed clear correspondence with those of proteins involved in transcription and *** of mitochondrial activity and amino acid metabolism in roots,and activation of stress-responsive proteins such as dehydrins and PLAT in shoots,may play a key role during the response of the plant to salinity *** and physiological responses showed that roots respond in a more highly adaptive manner than shoots to salinity stress,suggesting that this tissue is critical to the tolerance observed in cultivars harboring Saltol.

关键词： FL478 Shotgun proteomics Rice Salinity Root Saltol

Loss of largest and oldest individuals of the Montpellier snake correlates with recent warming in the southeastern Iberian Peninsula

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2017年第6期63卷 607-613页

作者： Cosme lopez-CALDERON Monica FERICHE Esmeralda ALAMINOS Juan M. PLEGUEZUELOS Department of Zoology Faculty of Biology University of Seville C/Reina Mercedes Seville E-41012 Spain Department of Zoology Faculty of Sciences University of Granada Granada E-18071 Spain

The effects of climate change on organisms are now being extensively studied in many different taxa. However, the variation in body size, usually shrinkage in response to increasing temperature, has received little attention regarding to reptiles. During past periods of global warming, many organisms shrank in size, and current evidence and experiments manipulating temperature have shown a biomass decrease in some organisms with increasing temperatures. Here we test whether the body size of the Montpellier snake Malpolon rnonspessulanus from the southeastern Iberian Peninsula is changing and correlated with the increasing temperature in this region during a 39- year period （1976-2014）. We measured the snout-vent length （SVL） of vouchers in scientific collections to check for trends in adult body size at the population level in relation with temperature, while controlling for the age of the individuals （estimated by skeletochronology, n =141）. Given the great ontogenetic variation in body size of the study species, we categorized age in 3 classes：＂young adults＂（under 5 years old）, ＂intermediate adults＂（from 5 to 7 years old）, and ＂old adults＂（from 8 to 14 years old）. By means of linear mixed models, we found a negative relationship between SVL of ＂old adults＂ and average annual temperature in the region during the lifetime of each individual. Our results indicate that largest and oldest individuals of the Montpellier Snake, that is, males because of strong sexual size dimorphism in this species, disappeared from the study population, and suggest that it occurred in response to rising environmental temperature.

关键词： body shrinkage climate warming differential mortality Malpolon monspessulanus skeletochronology snakes Spain.

Effect of Sn precursor on the synthesis of SnO2 and Sb-doped SnO2 particles via polymeric precursor method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Materials Science 2013年第4期7卷 387-395页

作者： Francisco lopez MORALES Teresa ZAYAS Oscar E. CONTRERAS Leonardo SALGADO Department of Chemistry Metropolitan Autonomous University- Iztapalapa P.O. Box 55-534 C.P. 09340 Mexico D.F. Mexico Postgraduate in Environmental Sciences and Center of Chemistry of the Science Institute Meritorious Autonomous University of Puebla P.O. Box 1613 C.P. 72000 Puebla Mexico Center of Nanoscience and Nanotechnology Department of Nanostructures P.O. Box 14 C.P. 22800 Ensenada B.C. Mexico

SnO2 and Sb-doped SnO2 particles were synthesized using the polymeric precursor method with different Sn salt precursors： SnCl2.2H2O, SnCl4.5H20, or Sn citrate. Sb2O3 was used as the precursor of Sb, and the molar ratio of nsn：nsb was held constant. FTIR and TGA/DTA were used to examine the influence of the Sn precursor on the formation and thermal decomposition of the Sn and Sn-Sb complexes. The calcination products obtained from heating the Sn and Sn-Sb complexes at 500℃ in air were analyzed using XRD and TEM analysis. The results revealed that the SnO2 and Sb-doped SnO2 formation temperatures depended on the nature of the Sn precursor. The calcination products were found to be SnO2 and Sb-doped SnO2 particles, which crystallized in a tetragonal cassiterite structure with a highly preferred （110） planar orientation. The Sn precursor and the presence of Sb in the SnO2 matrix strongly influenced the crystallinity and lattice parameters.

关键词： SnO2 and Sb-doped SnO2 Sn precursor Pechini method thermal decomposition nanoparticle

Clinical significance of cytomegalovirus infection in patients with inflammatory bowel disease

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第1期19卷 17-25页

作者： Elena Garrido Elisa Carrera Rebeca Manzano Antonio lopez-Sanroman Inflammatory Bowel Disease Clinic Department of GastroenterologyUniversity Hospital Ramón y Cajal28034 MadridSpain Department of Gastroenterology University Hospital of Guadalajara19002 GuadalajaraSpain Department of Gastroenterology Hospital Sureste28500 MadridSpain

Cytomegalovirus(CMV) infection is common in *** virus then enters a "latency phase" and can reactivate to different stimuli such as *** clinical significance of CMV infection in inflammatory bowel disease is different in Crohn's disease(CD) and ulcerative colitis(UC).CMV does not interfere in the clinical course of ***,CMV reactivation is frequent in severe or steroid-resistant *** is not known whether the virus exacerbates the disease or simply appears as a bystander of a severe *** methods are used to diagnose CMV *** is classically based on histopathological identification of viral-infected cells or CMV antigens in biopsied tissues using haematoxylin-eosin or immunohistochemistry,other tests on blood or tissue samples are currently being *** chain reaction performed in colonic mucosa has a high sensitivity and a positive result could be associated with a worse prognosis disease;further studies are needed to determine the most appropriate strategy with positive CMV-DNA in colonic *** endoscopic features have not been described in active UC and CMV *** colitis is usually treated with ganciclovir for several weeks,there are different opinions about whether or not to stop immunosuppressive *** antiviral drugs may be *** controlled studies would needed to determine which subgroup of UC patients would benefit from early antiviral treatment.

关键词： Cytomegalovirus Inflammatory bowel disease Crohn’s disease Ulcerative colitis Hematoxylin and eosin Immunohistochemical Polymerase chain reaction Ganciclovir Infectious colitis

Ozone forming potential and sulfur effects on in-use vehicles of the metropolitan area of Mexico City

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 Zhejiang University-Science A(Applied Physics & Engineering) 2006年第3期7卷 463-471页

作者： SCHIFTER I. DíAZ L. lopez-SALINAS E. Instituto Mexicano del Petróleo Estudios Ambientales Eje Central Lázaro Cárdenas No. 152 San Bartolo Atepehuacan México D.F. 07730 Mexico

The largest urban areas of Mexico cities have witnessed high levels of air pollution in the past few decades. The most important air pollutants are ozone and paniculate matter with levels that are still far above current air quality standard. In this work we studied exhaust and evaporative emissions of Mexico City metropolitan area （MAMC） vehicles using fuels in which sulfur content was varied from 89×10^-6 to 817×10^-6, and calculated the ozone forming potential of emissions as well as the specific reactivity of the exhaust for each average fleet-fuel combinations. Data on emission levels were compared to those obtained in 2000 for the same vintage of vehicles. The almost twofold increase in emissions found could be due to degradation of the exhaust emissions control systems.

关键词： Fuel formulation Ozone forming potential Vehicles emissions Mexico

Morphological and mineralogical characterizations of oolitic iron ore in the Exi region, China

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2013年第2期20卷 113-118页

作者： Shao-xian Song Ernesto Fabian Campos-Toro Yi-min Zhang Alejandro lopez-Valdivieso School of Resources and Environmental Engineering Wuhan University of Technology Instituto de Metalurgia Universidad Autonoma de San Luis Potosi

The morphological and mineralogical characterizations of a Chinese oolitic iron ore （Exi deposit） were studied by scanning electron microscopy and energy-dispersive X-ray spectroscopy in this work. It is shown that the Exi ore is mainly composed of hematite, quartz, apatite, and chlorite. The hematite is present as the oolitic layers and in the spaces between the aggregated ooids; quartz exists as granular particles in the spaces and as nucleuses in ooids; the harmful mineral, apatite, is associated with hematite as the oolitic layers, fine dissemination, granular particles in the spaces, and nucleuses in ooids. From the viewpoint of mineral beneficiation, it is hard to separate apatite and chlorite but easy to separate quartz from hematite in the Exi iron ore in recovering the iron values.

关键词： iron ores mineralogy morphology scanning electron microscopy

Exploring the reproductive ecology of the tropical semifossorial snake Ninia atrata

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2020年第2期41卷 157-171页

作者： Teddy Angarita-Sierra Cesar Alejandro lopez-Hurtado Tropical Organism Biology Research Group Universidad Nacional de ColombiaBogota111321Colombia Yoluka ONG Fundacion de Investigacion en Biodiversidad y ConservacionBogota110931Colombia Vicerrectoria de Investigacion Universidad Manuela BeltranBogota110231Colombia

Based on histological analyses and field studies,this research describes the reproductive ecology of a population of Ninia atrata snakes inhabiting an oil palm ***,through a multivariate approach,we explored the main drivers of reproductive output in *** showed that prey abundance and food intake were crucial variables contributing to reproductive *** linear regression models showed that neonates had high sensitivity(R2=55.29%)to extreme changes in climate,which was strongly related to slug and snail abundance variability and microhabitat *** cycles were markedly different between the sexes,being continuous in males and cyclical in *** this variation,reproductive cycles at the population level were seasonal *** recruitment of neonates all year,multiple clutches,high mating frequency,and continuous sperm production characterized the reproductive phenology of *** addition,a significant number of previtellogenic females presented oviductal sperm as well as uterine scars,suggesting a high precocity in the *** main drivers of reproductive output also differed between the *** females,clutch size and secondary follicle variability were highly related to stomach bolus volume,fat body area,and body *** males,height of piles of palm leaves and body mass,rather than intrinsic reproductive traits,were the main drivers of sperm ***,in both cases,the relationship between body mass,prey abundance,and food intake suggests that *** follows the income breeding strategy to compensate for reproductive costs and to maximize fitness.

关键词： Continuous male reproduction Clutch mass Income breeding Iteroparity Spermatogenesis Oogenesis Reproductive effort El Nino-Southern Oscillation(ENSO)

Is the speed of adjusting to environmental change condition dependent?An experiment with house mice(Mus musculus)

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2024年第3期70卷 350-360页

作者： Karem lopez-Hervas Neelam Porwal Mathilde Delacoux Alexandros Vezyrakis Anja Guenther RG Behavioural Ecology of Individual Differences Max Planck Institute for Evolutionary Biology24306 PlönGermany Department of Evolutionary Biology Faculty of BiologyAdam Mickiewicz UniversityWieniawskiego 161-712 PoznańPoland Department for Collective Behaviour Max Planck Institute of Animal Behaviour78464 ConstanceGermany Centre for the Advanced Study of Collective Behaviour University of Konstanz78464 ConstanceGermany Animal Ecology Institute for Biochemistry and BiologyUniversity of Potsdam14469 PotsdamGermany

Environmental conditions change constantly either by anthropogenic perturbation or naturally across space and ***,a change in behavior is the frst response to changing *** fexibility can potentially improve an organism’s chances to survive and ***,we lack an understanding on the time-scale such behavioral adjustments need,how they actually affect reproduction and survival and whether behavioral adjustments are suffcient in keeping up with changing *** used house mice(Mus musculus)to test whether personality and life-history traits can adjust to an experimentally induced food-switch fexibly in adulthood or by intergenerational plasticity,that is,adjustments only becoming visible in the offspring *** lived in 6 experimental populations of semi-natural environments either on high or standard quality food for 4 *** showed previously that high-quality food induced better conditions and a less risk-prone ***,we tested whether the speed and/or magnitude of adjustment shows condition-dependency and whether adjustments incur ftness ***-history but not personality traits reacted fexibly to a food-switch,primarily by a direct reduction of reproduction and sloweddown *** whose parents received a food-switch developed a more active stress-coping personality and gained weight at a slower rate compared with their respective ***,the modulation of most traits was condition-dependent,with animals previously fed with high-quality food showing stronger *** study highlights that life-history and personality traits adjust at different speed toward environmental change,thus,highlighting the importance of the environment and the mode of response for evolutionary models.

关键词： animal personality context dependence environmental change Match-mismatch non-genetic inheritance phenotypic flexibility phenotypic plasticity

Unsupervised full-color cellular image reconstruction through disordered optical fiber

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2023年第6期12卷 1091-1102页

作者： Xiaowen Hu Jian Zhao Jose Enrique Antonio-lopez Rodrigo Amezcua Correa Axel Schülzgen CREOL The College of Optics and PhotonicsUniversity of Central FloridaOrlandoFL 32816USA The Picower Institute for Learning and Memory Massachusetts Institute of TechnologyCambridgeMA 02139USA

Recent years have witnessed the tremendous development of fusing fiber-optic imaging with supervised deep learning to enable high-quality imaging of hard-to-reach ***,the supervised deep learning method imposes strict constraints on fiber-optic imaging systems,where the input objects and the fiber outputs have to be collected in *** unleash the full potential of fiber-optic imaging,unsupervised image reconstruction is in ***,neither optical fiber bundles nor multimode fibers can achieve a point-to-point transmission of the object with a high sampling density,as is a prerequisite for unsupervised image *** recently proposed disordered fibers offer a new solution based on the transverse Anderson ***,we demonstrate unsupervised full-color imaging with a cellular resolution through a meter-long disordered fiber in both transmission and reflection *** unsupervised image reconstruction consists of two *** the first stage,we perform a pixel-wise standardization on the fiber outputs using the statistics of the *** the second stage,we recover the fine details of the reconstructions through a generative adversarial *** image reconstruction does not need paired images,enabling a much more flexible calibration under various *** new solution achieves full-color high-fidelity cell imaging within a working distance of at least 4 mm by only collecting the fiber outputs after an initial *** imaging robustness is also demonstrated when the disordered fiber is bent with a central angle of 60°.Moreover,the cross-domain generality on unseen objects is shown to be enhanced with a diversified object set.

关键词： fiber optical image