检索结果-南通市图书馆

World Journal of Hepatology 2015年第7期7卷 1001-1006页

作者： Marisol Galvez-Martinez Alfredo I Servin-Caamano Eduardo Perez-Torres Francisco salas-Gordillo Xaira Rivera-Gutierrez Fatima Higuera-de la Tijera Gastroenterology Department Hospital General de México "Dr. Eduardo Liceaga" Internal Medicine Department Hospital General de México "Dr. Eduardo Liceaga" Faculty of Medicine "Universidad Veracruzana"

AIM: To identify a mean platelet volume(MPV) cutoff value which should be able to predict the presence of bacterial ***: An observational, analytic, retrospective study. We evaluated medical records of cirrhotic patients who were hospitalized from January 2012 to January 2014 at the Gastroenterology Department of "Hospital General de México Dr. Eduardo Liceaga", we included 51 cirrhotic patients with ascites fluid infection(AFI), and 50 non-infected cirrhotic patients as control group. Receiver operator characteristic curves were used to identify the best cutoff value of several parameters from hematic cytometry, including MPV, to predict the presence of ascites fluid ***: Of the 51 cases with AFI, 48 patients(94.1%) had culture-negative neutrocytic ascites(CNNA), 2(3.9%) had bacterial ascites, and one(2%)had spontaneous bacterial peritonitis. Infected patients had greater count of leucocytes and polymorphonuclear cells, greater levels of MPV and cardiac frequency(P 0.80). A cutoff MPV value of 8.3 fl was the best to discriminate between cirrhotic patients with AFI and those without infection. CONCLUSION: Our results support that MPV can be an useful predictor of systemic inflammatory response syndrome in cirrhotic patients with AFI, particularly CNNA.

关键词： Mean platelet volume Cirrhosis Ascites fluid infection Culture negative neutrocytic ascites Systemic inflammatory response

Hydraulic Jump in the Gulf of California

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Marine Science 2012年第4期2卷 141-149页

作者： David salas-Monreal David Alberto salas-de-Leon María Adela Monreal-Gomez Mayra Lorena Riverón-Enzástiga Erika Mojica-Ramírez Instituto de Ciencias del Mar y Limnología Mexico City Mexico Instituto de Ciencias Marinas y Pesquerias Universidad Veracruzana Veracruz Mexico Posgrado en Ciencias del Mar y Limnología Mexico City Mexico

Acoustic Doppler current profiles and water density profiles were measured over the 280 m deep continental slope of the Gulf of California to elucidate the bathymetric effect on zooplankton distribution. These measurements were combined with water velocity and density simulations from the Regional Ocean Model System with and without the influence of Coriolis acceleration. The data revealed an acceleration of the near-bottom flow as it moved toward increasing depths. This acceleration was produced by the adjustment of the isopycnals to bathymetry (hydraulic jump). Zooplankton patches moved downward at the continental slope and then upward, thus exhibiting wave patterns. Model outputs without the effect of Coriolis acceleration also suggested that vertical zooplankton concentration followed a wave pattern. However, when Coriolis acceleration was added to the momentum equation, the horizontal zooplankton distribution was enhanced, which reduced the vertical zooplankton concentration observed over irregular bathymetries. Coriolis acceleration was responsible for horizontal dispersal of up to 20% of the total zooplankton concentration located over the wave trough.

关键词： Hydraulic Jump Acoustic Doppler Current Profiles Internal Waves Zooplankton Biovolumes Gulf of California

Green Synthesis of Bimetallic Nanoparticles From Prosopis juliflora(Sw)DC.,and Its Effect Against Cotton Mealybug,Phenacoccus solenopsis(Hemiptera:Pseudococcidae)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2019年第3期88卷 269-275页

作者： V.Mendez-Trujillo B.Valdez-salas M.Carrillo-Beltran M.A.Curiel-Alvarez O.Tzintzun-Camacho C.Ceceña-Duran D.Gonzalez-Mendoza Facultad de Medicina de la Universidad Autónoma de Baja California Dr.Humberto Torres Sanginés S/NCentro Cívico21000MexicaliBaja CaliforniaMéxico Instituto de Ingeniería de la Universidad Autónoma de Baja California Calle de la Normal S/N y Boulevard Benito Juárez21100MexicaliBaja CaliforniaMéxico Instituto de Ciencias Agrícolas de la Universidad Autónoma de Baja California(ICA-UABC).Carretera a Delta S/N C.P.21705 Ejido Nuevo LeónBaja CaliforniaMéxico

Phenacoccus solenopsis has been recognized as an aggressively invasive species on cotton plants in different *** study was conducted to investigate the effect of green synthesized Cu/Zn-nanoparticles using aqueous leaf extract of Prosopis juliflora(mezquite)against *** scanning electron microscope(SEM)showed bimetallic nanoparticles of Cu/Zn-NPs with spherical shape with varying size of 74.33 nm to 59.46 *** than 30%mortality of *** was observed with Cu/Zn-nanoparticles(100 ppm)at 96 hours after *** mortality of *** was recorded with Cu/Zn solution(100 ppm)and aqueous *** *** results of the viability test for Cu/Zn-nanoparticles of *** showed a significant reduction of the cell viability by 50%in insect exposed to Cu/*** studies about nanotoxicity of Cu/Zn-NPs of *** are needed to reveal the mechanism of toxicity this phytonanoparticles in ***.

关键词： Photosynthesis biocontrol cotton mealybug nanoinsecticide

Glutathione peroxidase activity in cell cultures from different regions of human epididymis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2005年第1期7卷 33-37,页

作者： Enrique Castellon Hernan Rioseco Juan Rojas Michel Royer Eduardo salas Hoctor Contreras Christian Huidobro Physiology and Biophysics Program Institute of Biomedical Sciences Faculty of Medicine University. of Chile Santiago 6530499 Chile Urology Department Clinic Hospital J. J. Aguirre University of Chile Santiago 6530499 Chile

Aim: To study the secretory activity and androgen regulation of glutathione peroxidase (GPx) in epithelial cell cultures from human epididymis. Methods: Tissue was obtained from patients undergoing therapeutic orchidectomy for prostatic cancer. Epithelial cell cultures were obtained from the caput, corpus and cauda epididymides. Enzymatic activity was measured in conditioned media by colorimetric methods in absence or presence of 1, 10 or 100 nrnoI.L^(-1) testosterone. The effect of 1 μmol.L^(-1) flutamide was also evaluated. Results: GPx activity was higher in cultures from corpus and cauda than caput epididymidis. The presence of different concentrations of testosterone increase enzyme activity in cell cultures from all epididymal regions. Addition of flutamide reverses the androgen dependent increase of GPx activity. Conclusion: GPx activity is secreted from human epididymal cells in a region dependent manner and is regulated by androgens.

关键词： glutathione peroxidase human epididymis cell culture androgen regulation

The User Interfaces Transition Diagram-Editor: A Tool to Simplify User-System Interaction Modeling

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

Journal of Software Engineering and Applications 2023年第9期16卷 483-495页

作者： Maria C. Gómez-Fuentes Jorge Cervantes-Ojeda Alan Badillo-salas Department of Applied Mathematics and Systems Universidad Autónoma Metropolitana Mexico City Mexico

The User Interface Transition Diagram (UITD) is a formal modeling notation that simplifies the specification and design of user-system interactions. It is a valuable communication tool for technical and non-technical stakeholders during the requirements elicitation phase, as it provides a simple yet technically complete notation that is easy to understand. In this paper, we investigated the efficiency of creating UITDs using ***, a widely used diagramming software, compared to a dedicated UITD editor. We conducted a study to compare the time required to use each tool to complete the task of creating a medium size UITD, as well as the subjective ease of use and satisfaction of participants with the dedicated Editor. Our results show that the UITD editor is more efficient and preferred by participants, highlighting the importance of using specialized tools for creating formal models such as UITDs. The findings of this study have implications for software developers, designers, and other stakeholders involved in the specification and design of user-system interactions.

关键词： UITD User Interfaces Flow Specification Requirements Specification Modelling Notation

Epidemiological assessment of intestinal parasitic infections in dogs at animal shelter in Veracruz,Mexico

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2015年第1期5卷 34-39页

作者： Cosme Alvarado-Esquivel Dora Romero-salas Mariel Aguilar-Domínguez Anabel Cruz-Romero Nelly Ibarra-Priego dalberto Angel Pérez-de-Len Biomedical Research Laboratory School of Medicine and NutritionJuarez University of the State of DurangoAvenida Universidad S/N34000 DurangoMexico Parasitology Laboratory School of Veterinary Medicine and ZootechnicsUniversidad VeracruzanaCircunvalacin y Yez S/N91710 VeracruzMexico United States Department of Agriculture Agricultural Research ServiceKnipling-Bushland U.S. Livestock Insects Research Laboratory

Objective:To determine the prevalence of infection with intestinal parasites in 101 dogs in an animal shelter in ***,and investigate whether any general characteristics of the dogs were associated with ***:Parasitologiesl examination of fecal samples from the dogs was performed by means of centrifuge-flotation using Sheather's sucrose and zinc sulfate flotation *** addition,hematocrit was determined in each canine blood ***:Intestinal parasites were found in 99(98.0%) of the 101 dogs *** five different intestinal parasites were identified:Ancylostoma caninum in 89 dogs(88.1%).Giardia canis in 46(45.5%).Unciiuiria stenocephalia in 43(42.6%).Trichuris vulpis in 19(18.8%)and Strongyloides canis in 16(15.8%).Multivariate analysis showed:I) Giardia infection was associated with young age and mixed breed;2) Ancylostoma was associated with young age and no rabies vaccination:and 3) Strongyloides was associated with no rabies *** and Trichuris infections were not associated with the variables ***:A high prevalence of intestinal parasites was found in the dogs *** suggests that the environment is highly contaminated with intestinal *** and therapeutic measures should be taken against infection with intestinal parasites in dogs in this region.

关键词： Intestinal parasites Infection Prevalence Shelter Dogs Mexico

Maternal Response of Perinatally Underfed Wistar Virgin Females Exposed to Newborn Rats

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 Behavioral and Brain Science 2019年第3期9卷 78-89页

作者： Manuel salas Mirelta Regalado Carmen Torrero Minerva Ortiz-Valladares Lorena Rubio Department of Developmental Neurobiology and Neurophysiology Institute of Neurobiology National Autonomous University of Mexico Campus UNAM Juriquilla Queretaro Mexico

Nutrition plays a major role in the survival of the progeny, and its perinatal deficiencies delay physical development and interfere with social and cognitive performance later in life. The effects of early undernutrition on maternal social performance of sensitized adult virgin rats were evaluated. Several maternal and non-maternal responses were measured in virgin female Wistar rats randomly divided into two groups, control and early undernourished, during 19 days of chronic daily exposure to fresh foster pups in home-cage conditions. Underfed females (F0) received different percentages of a balanced diet during gestation. After birth, pups were underfed (F1) by alternating every 12 h between litters two lactating dams, one with ligated nipples. Weaning was at 25 days of age followed by an ad lib diet until postpartum day 90, when sensitized virgins were maternally tested daily for seven successive sessions. Significantly (p < 0.05) low body weight scores in UG F1 virgins of five different ages were observed. The UG F1 females expressed significantly (p < 0.05) lower frequency values in sniffing, licking, retrieving, crouching, and handling shavings, with clear prolonged sniffing, retrieving and handling shaving latencies towards the foster pups compared with CG F1 sensitized females. Self-grooming was not affected, whereas exploration was significantly reduced. Current findings suggest that perinatal undernutrition interfered the organization of a core neuronal circuitry underlying the mother-litter interactions involved in social and cognitive performance of sensitized adult virgins. Furthermore, the behavioral maternal alterations in F1 virgins may possibly generate a risky negative social environment to induce cognitive and/or brain disorders in later generations.

关键词： Early Undernutrition Maternal Sensitization Cognitive Development Rats

Complex causes and consequences of rangeland greening in South America -multiple interacting natural and anthropogenic drivers and simultaneous ecosystem degradation and recovery trends

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geography and Sustainability 2020年第4期1卷 304-316页

作者： Wang Li Robert Buitenwerf Renata Nicora Chequín Javier Elias Florentín Roberto Manuel salas Julia Carolina Mata Li Wang Zheng Niu Jens-Christian Svenning Center for Biodiversity Dynamics in a Changing World(BIOCHANGE) Aarhus UniversityNy Munkegade 114Aarhus C 8000Denmark Section for Ecoinformatics and Biodiversity Department of BiologyAarhus UniversityNy Munkegade 114Aarhus C 8000Denmark State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100101China Instituto de Botánica del Nordeste(CONICET-UNNE) Sargento Cabral 2131c.c.209C.P.3400Argentina University of Chinese Academy of Sciences Beijing 100049China

Land-surface greening has been reported globally over the past *** often seen to represent ecosystem recovery,the impacts on biodiversity and society can also be *** has been widely reported from rangelands,where drivers and processes are complex due to its high environmental heterogeneity and societal ***,we assess the complexity behind greening and assess its links to various drivers in an iconic,heterogeneous rangeland area,the IberáWetlands and surroundings,in ***-series satellite imagery over the past 19 years showed overall net greening,but also substantial local browning both in protected and unprotected areas,linking to land use,temporal changes in surface water,fire,and *** found substantial woody expansion mainly in the unprotected land,with 37%contributed by tree plantations and the remaining 63%by spontaneous woody expansion,along with widespread transitions from terrestrial land to seasonal surface *** occurrences tended to reduce greening with unprotected areas experiencing widespread and frequent ***,protected areas had more browning in unburnt areas than burned *** variation in annual precipitation and temperature tended to nonlinearly influence fire occurrences with an interplay of human fire management,further shaping the vegetation greening,pointing to high complexity behind the observed rangeland greening involving interactions among local *** findings highlight that the observed overall greening is an outcome of multiple trends with clear negative impacts on biodiversity and the local livestock-oriented culture(notably expanding tree plantations)and spontaneous vegetation dynamics,partly involving spontaneous woody *** latter has positive potential for biodiversity and ecosystem services in terms of woodland recovery,but can become negative in such a natural savanna region if expansions develop on a too broad scale,highlighting the importance of ensu

关键词： South America Rangeland Vegetation greening Climate change Sustainability Remote sensing

Hypertension and obesity in living kidney donors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Transplantation 2021年第6期11卷 180-186页

作者： Mahmoud M Mohamed Ahmed Daoud Syed Quadri Michael J Casey Mariah Aurora Posadas salas Vinaya Rao Tibor Fülöp Karim M Soliman Department of Medicine Division of NephrologyUniversity of TennesseeMemphisTN 38163United States Department of Medicine Division of NephrologyCairo UniversityCairo 11562Egypt Department of Medicine Division of NephrologyMedical University of South CarolinaCharlestonSC 29425United States Medicine Service Ralph H.Johnson VA Medical CenterCharlestonSC 29401United States

Over the past few decades,the shortage in the kidney donor pool as compared to the increasing number of candidates on the kidney transplant waitlist led to loosening of kidney donors’acceptance *** and obesity represent risk factors for chronic kidney disease,both in native kidneys and those in kidney transplant *** great progress has been made in kidney transplantation from living donors to benefit the recipient survival and quality of life,progress has been slow to fully risk-characterize the *** review critically reassesses the current state of understanding regarding the risk of endstage kidney disease in those donors with obesity,hypertension or *** risk assessment tools need to be developed urgently to fully understand the risk glomerular filtration rate compensation failure in the remaining kidney of the donors.

关键词： Living donor Kidney Obesity Hypertension Living kidney donors

Olfactory Discrimination in Adult Male Rats Undernourished during the Pre- and Neonatal Period

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 Behavioral and Brain Science 2012年第3期2卷 283-290页

作者： Mitzi G. Carreon Carmen Torrero Mirelta Regalado Lorena Rubio Manuel salas Developmental Neurobiology and Neurophysiology Department Neurobiology Institute University of Mexico Campus UNAM Juriquilla Queretaro Mexico

In the neonatal rat, the olfactory system is a fundamental channel to locate and recognize the mother, to survive and develop early social behavior, and to distinguish related or unrelated members of a litter. Perinatal undernutrition in rats alters the neuronal organization and functioning of the olfactory system and its ascending relays, possibly affecting odor discrimination. In this study we compared the frequency and time spent visiting the source of urine obtained from unrelated female subjects and amyl acetate odors vs water in adult perinatally underfed rats. Each test initiated with one daily presentation during three consecutive aliquots of deionized water (10 μl) placed on a filter paper for 2 min, separated by 1-min intervals for habituation. The water presentations were followed by three exposures to an odor, all at the same dilution (either 1:1 or 1:80) for dishabituation. Control (C) and undernourished (U) subjects display similar, significant habituation/dishabituation responses, except that the U subjects showed greater increases in the frequency and duration of visits to undiluted and diluted urine and amyl acetate cues compared to the controls. These findings are similar to previous studies showing that adult rats investigate novel odors longer than the familiar ones. Thus, perinatal undernutrition appears to interfere with the foundation of the olfactory development causing long-term olfactory discrimination deficits as revealed by the increased frequency and duration of visits to the source of odors that may be relevant for social behavior.

关键词： Olfactory Discrimination Main Olfactory System Perinatal Undernutrition