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Black gill disease in Litopenaeus vannamei made by various agents

Aquaculture and Fisheries 2024年第4期9卷 626-634页

作者： Mohammad Khalil Pazir Sajjad Pourmozaffar Ivone Giffard mena Ren Shengjie Amirhossein Ahmadi Issa Sharifpour Iran Shrimp Research Center Iranian Fisheries Science Research InstituteAgricultural ResearchEducation and Extension Organization(AREEO)Bushehr75169-89177Iran Persian Gulf Mollusks Research Station Persian Gulf and Oman Sea Ecology Research CenterIranian Fisheries Sciences Research InstituteAgricultural Research Education and Extension Organization(AREEO)Bandar-e-Lengeh75145Iran AEO Team UMR 5119 EcolagUniversite Montpellier IIMontpellier Cedex 0534095France Faculty of Science Queensland University of TechnologyQLD4001Australia Department of Biological Science and Technology Faculty of Nano and Bio Science and TechnologyPersian Gulf UniversityBushehr75169Iran Iranian Fisheries Science Research Institute Agricultural ResearchEducation and Extension Organization(AREEO)Tehran14968-13151Iran

Melanization of shrimp gills is a general symptom in shrimp black bill diseases(sBG);therefore,the cause is not immediately *** study aimed to determine the primary and secondary agents associated with a black gill outbreak in the Delvar complex in the Bushehr Province of *** July and August of 2020,450 healthy and affected shrimps were collected based on brown to black gill color from three farms of the Bushehr Province in *** of pathogens was performed by gross signs,wet mounts,microbiological tests,histopathology methods,and sequencing of molecular *** mean weight and length of infected shrimps was significantly(P<0.05)lower than the healthy *** histological examination of sBG indicated the adhesion of secondary lamellae,accumulation of hemocyte cells at the end of the secondary lamellae,and necrosis of epithelial cells with pyknosis and *** to our results,Aspergillus sydowii as a primary agent correlates with sBG disease in Litopenaeus vannamei from Iran,and other biotic factors,including bacterial(Vibrio owensii and ***)probably are secondary agents associated with sBG disease.

关键词： Black gill disease Litopenaeus vannamei Aspergillus Vibrio sp. Protozoan

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体位性低血压的危险因素:老年男女存在差异

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中华高血压杂志 2019年第6期27卷 598-598页

作者： Méndez AS Melgarejo JD mena lj Chávez CA González AC Boggia J Terwilliger JD Lee JH Maestre GE 陈云叶鹏不详

体位性低血压(orthostatic hypotension,OH)一般发生在站立后调节血压水平的机制发生变化以后。目前尚不清楚不同性别间OH的发生率和危险因素有何不同。本文旨在调查老年人OH患病率和危险因素的性别差异。方法:纳入来自委内瑞拉马拉开... 详细信息

体位性低血压(orthostatic hypotension,OH)一般发生在站立后调节血压水平的机制发生变化以后。目前尚不清楚不同性别间OH的发生率和危险因素有何不同。本文旨在调查老年人OH患病率和危险因素的性别差异。方法:纳入来自委内瑞拉马拉开波老龄化研究的882名参与者。从仰卧位到站立位3 min后,收缩压持续下降≥20和(或)舒张压持续下降≥10 mm Hg(1 mm Hg=0.133 kPa)定义为OH。考虑到性别的交互作用和性别分层,研究者采用多因素Logistic回归模型评估男、女OH危险因素的相关性。

关键词：体位性低血压危险因素老年人 Logistic回归模型性别差异血压水平委内瑞拉交互作用

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Degradation of AZ31 and AZ91 magnesium alloys in different physiological media:Effect of surface layer stability on electrochemical behaviour

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Journal of Magnesium and Alloys 2020年第3期8卷 667-675页

作者： Emmanuel mena-Morcillo Lucien Veleva Applied Physics Department Center for Investigation and Advanced StudyCINVESTAV-IPNCarr.Ant.a Progreso Km.697310 MeridaYucatanMexico

This work deals with the degradation of AZ31 and AZ91 magnesium alloys when they are exposed to three types of physiological media for seven days at 37°C:Ringer's,Hanks\and simulated body fluid(SBF)solutions.A combination of immersions tests and surface characterisation methods were employed to evaluate the attack on the surface,and the stability of the formed corrosion product layers for each alloy/electrolyte *** of the Mg-ion released into the electrolytes were also carried out in order to be correlated with the degradation of the *** impedance spectroscopy(EIS)and potentiodynamic polarisation(PDP)techniques were employed to compare the performance of the alloys in these different aggressive *** to the obtained results,the Mg-alloys exposed to Hanks'media were the less affected,which fact was attributed to a higher stability of the corrosion products layer formed in this medium,in comparison of those formed in Ringer's and SBF *** add让ion,the corrosion damage was lower for AZ91 than for AZ31 alloy in all environments due to its higher Al *** mass loss rates calculated from both immersion tests and electrochemical methods followed the same trend for comparative purposes between alloys.

关键词： Mg-alloys AZ-series Surface layer Physiological media Mass loss rate Degradation

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A Note on Extreme Points in Dual Spaces

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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

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Availability-based simulation and optimization modeling framework for open-pit mine truck allocation under dynamic constraints

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International Journal of Mining Science and Technology 2013年第1期23卷 113-119页

作者： mena Rodrigo Zio Enrico Kristjanpoller Fredy Arata Adolfo European Foundation for New Energy-Electricity of France at Central School of Paris-Supelec Paris 92295 France Energy Department Polytechnic of Milan Milan 20133 Italy Department of Industrial Engineering Federico Santa Maria Technical University Valparaiso 2390123 Chile Industrial Engineering School Pontifical Catholic University of Valparaiso Valparaiso 2340025 Chile

We present a novel system productivity simulation and optimization modeling framework in which equipment availability is a variable in the expected productivity function of the system. The framework is used for allocating trucks by route according to their operating performances in a truck-shovel system of an open-pit mine, so as to maximize the overall productivity of the fleet. We implement the framework in an originally designed and specifically developed simulator-optimizer software tool. We make an application on a real open-pit mine case study taking into account the stochasticity of the equipment behavior and environment. The total system production values obtained with and without considering the equipment reliability, availability and maintainability (RAM) characteristics are compared. We show that by taking into account the truck and shovel RAM aspects, we can maximize the total production of the system and obtain specific information on the production availability and productivity of its components.

关键词： Simulation Optimization Reliability Productivity Open-pit Truck allocation

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Neural Network-Based Second Order Reliability Method(NNBSORM)for Laminated Composite Plates in Free Vibration

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Computer Modeling in Engineering & Sciences 2018年第4期115卷 105-129页

作者： mena E.Tawfik Peter L.Bishay Edward E.Sadek Aerospace Engineering Department Faculty of EngineeringCairo UniversityEgypt Mechanical and Aerospace Engineering Department Rutgersthe State University of New JerseyNew BrunswickNJUSA Mechanical Engineering Department College of Engineering and Computer ScienceCalifornia State UniversityNorthridgeCAUSA.

Monte Carlo Simulations(MCS),commonly used for reliability analysis,require a large amount of data points to obtain acceptable accuracy,even if the Subset Simulation with Importance Sampling(SS/IS)methods are *** Second Order Reliability Method(SORM)has proved to be an excellent rapid tool in the stochastic analysis of laminated composite structures,when compared to the slower MCS ***,SORM requires differentiating the performance function with respect to each of the random variables involved in the *** most suitable approach to do this is to use a symbolic solver,which renders the simulations very slow,although still faster than ***,the inability to obtain the derivative of the performance function with respect to some parameters,such as ply thickness,limits the capabilities of the classical *** this work,a Neural Network-Based Second Order Reliability Method(NNBSORM)is developed to replace the finite element algorithm in the stochastic analysis of laminated composite plates in free *** of the ability to obtain expressions for the first and second derivatives of the NN system outputs with respect to any of its inputs,such as material properties,ply thicknesses and orientation angles,the need for using a symbolic solver to calculate the derivatives of the performance function no longer *** proposed approach is accordingly much faster,and easily allows for the consideration of ply thickness *** present analysis showed that dealing with ply thicknesses as random variables results in 37%increase in the laminate’s probability of failure.

关键词： Reliability analysis artificial neural network composite laminates subset simulation importance sampling Monte Carlo

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Characterization of Cd1-xZnxTe（0≤x≤1） Nanolayers Grown by Atomic Layer Deposition on GaSb and GaAs（001） Oriented Substrates

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Journal of Electronic Science and Technology 2019年第2期17卷 97-108页

作者： Joel Díaz-Reyes Roberto Saúl Castillo-Ojeda José Eladio Flores-mena Center for Research in Applied Biotechnology Instituto Politécnico Nacional Tepetitla 90700 Mexico Universidad Politécnica de Pachuca Pachuca 43830 Mexico Faculty of Sciences of the Electronics Autonomous University of Puebla Puebla 72570 Mexico

ZnTe, CdTe, and the ternary alloy CdZnTe are important semiconductor materials used widely for the detection of an important range of electromagnetic radiation as gamma ray and X-ray. Although, recently these materials have acquired renewed importance due to the new explored nanolayer properties of modern devices. In addition, as shown in this work they can be grown using uncomplicated synthesis techniques based on the deposition in vapour phase of the elemental precursors. This work presents the results obtained from the deposition of nanolayers of these materials using the precursor vapour on GaAs and GaSb (001) substrates. This growth technique, extensively known as atomic layer deposition (ALD), allows the layers growth with nanometric dimension. The main results presented in this work are the used growth parameters and the results of the structural characterization of the layers by the means of Raman spectroscopy measurements. Raman scattering shows the peak corresponding to longitudinal optical (LO)-ZnTe, which is weak and slightly redshift in comparison with that reported for the ZnTe bulk at 210 cm^-1. For the case of the CdTe nanolayer, Raman spectra presented the LO-CdTe peak, which is indicative of the successful growth of the layer. Its weak and slightly redshift in comparison with that reported for the CdTe bulk can be related with the nanometric characteristic of this layer. The performed high-resolution X-ray diffraction (HR-XRD) measurement allows to study some important characteristics such as the crystallinity of the grown layer. In addition, the HR-XRD measurement suggests that the crystalline quality has dependence on the growth temperature.

关键词： Ⅲ-Ⅴ substrates atomic layer deposition(ALD) defect generation mechanism ternary alloy Cd1-xZnxTe Zn and Cd mixture

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Minimally invasive spleen-preserving distal pancreatectomy: Does splenic vessel preservation have better postoperative outcomes? A systematic review and meta-analysis

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Hepatobiliary & Pancreatic Diseases International 2015年第4期14卷 346-353页

作者： Fady Elabbasy Rahul Gadde mena M Hanna Danny Sleeman Alan Livingstone Danny Yakoub Division of Surgical Oncology Department of Surgery Sylvester Comprehensive Cancer Center University of Miami-Miller School of Medicine

BACKGROUND： Minimally invasive spleen-preserving distal pancreatectomy （SPDP） can be performed with either splenic vessel preservation （SVP） or resection [Warshaw procedure （WP）]. The aim of this study was to evaluate the postoperative clinical outcomes of patients undergoing both methods. DATA SOURCES： Database search of PubMed, Embase, Scopus, Cochrane, and Google Scholar was performed （2000-2014）; key bibliographies were reviewed. Qualified studies compar- ing patients undergoing SPDP with either SVP or WP, and as- sessing postoperative complications were included. Calculated pooled risk ratio （RR） with the corresponding 95% confidence interval （CI） by random effects methods were used in the meta-analyses. RESULTS： The search yielded 215 studies, of which only 14 observational studies met our selection criteria. The studies included 943 patients in total; 652 （69%） underwent SVP and 291 （31%） underwent WP. Overall, there was a lower incidence of splenic infarction （RR=0.17; 95% Ch 0.09-0.33; P〈0.001）, gastric varices （RR=0.16; 95% Ch 0.05-0.51; P=0.002）, and intra/postoperative splenectomy （RR=0.20; 95% Ch 0.08-0.49; P〈0.001） in the SVP group. There was no difference in in- cidence of pancreatic fistula （WP vs SVP, 23.6% vs 22.9%;P=0.37）, length of hospital stay, operative time or blood loss. There was moderate cross-study heterogeneity. CONCLUSIONS： SVP is a safe, efficient and feasible technique that may be used to preserve the spleen. WP may be more suit- able for large tumors dose to the splenic hilum or those associ- ated with splenomegaly. Randomized clinical trials are justified to examine the long-term benefits of SVP-SPDP.

关键词： splenic infarction spleen-preserving distal pancreatectomy splenic vessel preservation Warshaw procedure gastric varices

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A nonlinear relapse model with disaggregated contact rates:Analysis of a forward-backward bifurcation

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Infectious Disease Modelling 2023年第3期8卷 769-782页

作者： Jimmy Calvo-Monge Fabio Sanchez Juan Gabriel Calvo Dario mena Escuela de Matematica Universidad de Costa RicaCiudad Universitaria Rodrigo FacioSan Jose11501Costa Rica Centro de Investigacion en Matematica Pura y Aplicada Universidad de Costa RicaCiudad Universitaria Rodrigo FacioSan Jose11501Costa Rica

Throughout the progress of epidemic scenarios,individuals in different health classes are expected to have different average daily contact *** contact heterogeneity has been studied in recent adaptive models and allows us to capture the inherent differences across health statuses *** with reinfection bring out more complex scenarios and offer an important application to consider contact ***,we developed a nonlinear differential equation model to explore the dynamics of relapse phenomena and contact differences across health *** incidence rate function is formulated,taking inspiration from recent adaptive *** incorporates contact behavior for individuals in each health *** use constant contact rates at each health status for our analytical results and prove conditions for different forward-backward bifurcation *** relationship between the different contact rates heavily in-fluences these *** examples highlight the effect of temporarily recov-ered individuals and initial conditions on infected population persistence.

关键词： Nonlinear relapse Nonlinear incidence MaMthematical model Backward bifurcation Adaptive behavior 2000 MSC 37N25 92B05

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Pediatric bowel preparation: Sodium picosulfate, magnesium oxide, citric acid vs polyethylene glycol, a randomized trial

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World Journal of Gastroenterology 2020年第40期26卷 6260-6269页

作者： Carmen Cuffari Steven L Ciciora Masakazu Ando mena Boules Joseph M Croffie Department of Pediatrics The Johns Hopkins School of MedicineBaltimoreMD 21287United States Department of Pediatrics The Ohio State University College of MedicineColombusOH 43205United States Department of Statistics Ferring Pharmaceuticals IncParsippanyNJ 07054United States Department of Medical Affairs Ferring Pharmaceuticals IncParsippanyNJ 07054United States Department of Pediatrics Indiana University School of MedicineIndianapolisIN 46202United States

BACKGROUND Bowel preparation in children can be *** To describe the efficacy, safety, and tolerability of sodium picosulfate, magnesium oxide, and citric acid(SPMC) bowel preparation in *** Phase 3, randomized, assessor-blinded, multicenter study of low-volume, divided dose SPMC enrolled children 9-16 years undergoing elective colonoscopy. Participants 9-12 years were randomized 1:1:1 to SPMC ? dose × 2, SPMC 1 dose × 2, or polyethylene glycol(PEG). Participants 13-16 years were randomized 1:1 to SPMC 1 dose × 2 or PEG. PEG-based bowel preparations were administered per local protocol. Primary efficacy endpoint for quality of bowel preparation was responders(rating of ‘excellent' or ‘good') by modified Aronchick Scale. Secondary efficacy endpoint was participant's tolerability and satisfaction from a 7-item questionnaire. Safety assessments included adverse events(AEs) and laboratory *** 78 participants were randomized, 48 were 9-12 years, 30 were 13-16 years. For the primary efficacy endpoint in 9-12 years, 50.0%, 87.5%, and 81.3% were responders for SPMC ? dose × 2, SPMC 1 dose × 2, and PEG groups, respectively. Responder rates for 13-16 years were 81.3% for SPMC 1 dose × 2 and 85.7% for PEG. Overall, 43.8% of participants receiving SPMC 1 dose × 2 reported it was ‘very easy' or ‘easy' to drink, compared with 20.0% receiving PEG. Treatment-emergent AEs were reported by 45.5% of participants receiving SPMC 1 dose × 2 and 63.0% receiving *** SPMC was an efficacious and safe for bowel preparation in children 9-16 years, with comparable efficacy to PEG. Tolerability for SPMC was higher compared to PEG.

关键词： Children Colonoscopy Colon cleansing Sodium picosulfate magnesium oxide and citric acid Polyethylene glycol

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