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Use of IVF and ET in Mexican Criollo Sheep (Ovis aries): Immediate and Delayed Embryo Transfers

Advances in Reproductive Sciences 2016年第1期4卷 8-16页

作者： José ernesto Hernández Pichardo Francisco ortiz José Luis Rodríguez Yvonne Ducolomb Filiberto Fernández Reyes Miguel Betancourt Eduardo Casas Yvonne Heuze Michael E. Kjelland Salvador Romo Departamento de Producción Agrícola y Animal División de Ciencias Biológicas y de la Salud Universidad Autónoma Metropolitana-Xochimilco México DF México SVI México y Crio Vida Animal México Camino San Rafael 2 Col. San Rafael Querétaro México Departamento de Ciencias de la Salud División de Ciencias Biológicas y de la Salud Universidad Autónoma Metropolitana-Iztapalapa México DF México Conservation Genetics & Biotech LLC Valley City ND USA Laboratorio de Reproducción Facultad de Estudios Superiores Cuautitlán UNAM Estado de México México

There is little information in the scientific literature concerning sheep pregnancy and lambing success with regard to the timeframe from when in vitro produced embryos are transported to the designated location for embryo transfer (ET). The aim of this study was to transfer in vitro produced embryos under two different conditions that could typically occur using the aforementioned assisted reproductive techniques (ARTs). Abattoir ovaries were used to procure oocytes for in vitro embryo production and subsequent transfer to synchronized ewes. The study consisted of two experiments: Experiment 1 (Exp1)—embryos taken from the laboratory to a nearby surgical room for immediate ET, and Experiment 2 (Exp2)—ET after 5 hours (h) of transport to a rural farm. Lambing in relation to detected pregnancies, births compared to pregnancies, and the proportion of twin offspring were all higher in Exp2. Notably, in both Exp1 and Exp2, there was not a significant difference (P > 0.05) between the number of embryos transferred, i.e., 3 versus 4, respectively, and the number of ewes that underwent parturition in each group. Also, in both experiments there was not a significant difference (P > 0.05) in the number of ewes that underwent parturition based on the number (i.e., ≥1) of corpora lutea present. The results of the present study demonstrate the importance of evaluating different conditions when applying ARTs, as there are many variables that can influence the outcome. Importantly, Exp2 results show that ovine ET in places located far away from the embryo production site can be useful and successful provided that embryo transport, ET, and recipient conditions are adequate.

关键词： Embryo (Transfer) Fertilization (In Vitro) Ovine Reproduction (Assisted) Sheep

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Synthesis of advanced ceramics by hydrothermal crystallization and modified related methods

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Journal of Advanced Ceramics 2012年第3期1卷 204-220页

作者： Joséortiz-LANDEROS Carlos GÓMEZ-YÁÑEZ Rigoberto LÓPEZ-JUÁREZ Iván DÁVALOS-VELASCO Heriberto PFEIFFER Departamento de Ingeniería Metalúrgica Escuela Superior de Ingeniería Química e Industrias ExtractivasIPNUPALMAv.Instituto Politécnico Nacional s/nCP 07738México DFMéxico. Centro de Ciencias Aplicadas y Desarrollo Tecnológico Universidad Nacional Autónoma de MéxicoA.P.70-186CoyoacánMéxico D.F.México. Instituto de Investigaciones en Materiales Universidad Nacional Autónoma de MéxicoCircuito exterior s/nCiudad UniversitariaDel.CoyoacánCP 04510México DFMéxico.

The present article aims to give a brief overview about the advantages of the hydrothermal crystallization method for the synthesis of advanced *** is given,not only on the conventional hydrothermal crystallization,but also on some of its variants;such as ultrasound-assisted,electrochemical-assisted,microwave-assisted and surfactant-assisted hydrothermal methods which open up new opportunities for the synthesis of ceramic materials with novel properties demanded for advanced *** the current work the synthesis of barium titanate(BaTiO3),lithium metasilicate(Li2SiO3)and sodium-potassium niobate(Na,K)NbO3 powders are reported as cases of study.

关键词： hydrothermal synthesis barium titanate Li_(2)SiO_(3) potassium-sodium niobate

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Assessment of Mg(OH)_(2)/TiO_(2) coating in the Mg-Ca-Zn alloy for improved corrosion resistance and antibacterial performance

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Journal of Magnesium and Alloys 2023年第1期11卷 361-378页

作者： Leonardo Hernández Jesús Ramón-Sierra Montserrat Soria-Castro Ángel Bacelis Geonel Rodríguez-Gattorno Elizabeth ortiz-Vázquez Gloria Acosta Applied Physics Department Center for Research and Advanced Studies of the National Polytechnic Institute(CINVESTAV-IPN)Carr.Ant.a Progreso km.6C.P.97310MeridaYucatanMexico Tecnológico Nacional de México/Instituto Tecnológico de Mérida.Av.Tecnológico s/n Km.4.5 ant.Carr.Mérida-Progreso C.P.97118MéridaYucatánMéxico Facultad de Química Universidad Nacional Autónoma de México(UNAM)Av.Universidad 3000C.P.04510CoyoacánCDMXMéxico

The high activity of metallic magnesium and alloys limits its potential in biomedical applications;in recent years,extensive efforts have been devoted to modulating this *** this work,we present Mg(OH)_(2) and TiO_(2)barrier coatings to reduce the degradation of magnesium alloy(Mg-Ca-Zn)*** coatings were deposited by the anodization method and the spin-coating technique,*** anodized layer was coated with TiO_(2)generated from the hydrolysis of 3%weight of TTIP(Ti[OCH(CH_(3))_(2)]_(4),Titanium(IV)isopropoxide)in 2-Propanol deposited by the spin-coating *** the degradation in Ringer’s solution by electrochemical impedance spectroscopy and OCP revealed a 98%reduction in pittings in uncoated samples after 14 days of *** p H measurements revealed that the TiO_(2)coating reduced the alkalization of the physiological environment,keeping the pH at 6.0 *** vitro studies of two types of bacteria(*** and ***)exhibited zones of inhibition in the agar and activity bactericidal(kill time test).The mechanisms behind the improved degradation resistance and enhanced antibacterial activity are presented and discussed *** modification with Mg(OH)_(2)/TiO_(2)coatings is a promising strategy to control the biodegradation of magnesium implants for bone regeneration.

关键词： Magnesium alloy EIS Mg(OH)_(2) TiO_(2) Antibacterial coatings

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Friction-based riveting technique for AZ31 magnesium alloy

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Journal of Magnesium and Alloys 2022年第1期10卷 122-130页

作者： Tianhao Wang Scott Whalen Xiaolong Ma Joshua Silverstein Hrishikesh Das Madhusudhan R.Pallaka Angel ortiz Timothy Roosendaal Piyush Upadhyay Keerti S Kappagantula Pacific Northwest National Laboratory MSIN:K2-03902 Battelle Blvd.RichlandWA 99352United States

A new friction-based riveting technique, Rotating Hammer Riveting(RHR), is demonstrated to fully form AZ31 Mg rivet heads in a mere 0.23 s. Heat and pressure generated through severe plastic deformation during the process was sufficient to form the Mg rivet head without the need for a pre-heating operation. Due to preliminary twinning and followed by dynamic recrystallization, AZ31 Mg grains in the rivet head were refined during RHR, which enhance the formability of Mg rivets by triggering grain boundary sliding and reducing plastic anisotropy of Mg. In addition, RHR joints showed a metallurgical bond between the rivet head and top AZ31 Mg sheet, which eliminates a significant pathway for corrosion.

关键词： Rivet Magnesium Dissimilar joining

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Multi-phase(Zr,Ti,Cr)B_(2) solid solutions:Preparation,multi-scale microstructure,and local properties

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Journal of Advanced Ceramics 2023年第2期12卷 414-431页

作者： Laura SILVESTRONI Nicola GILLI Alex SANGIORGI Alessandro COROZZI Suzana FILIPOVIĆ Nina OBRADOVIĆ Laia ortiz-MEMBRADO Emilio JIMÉNEZ-PIQUÉ William G.FAHRENHOLTZ CNR-ISSMC Institute of ScienceTechnology and Sustainability for Ceramics(former ISTEC)Via Granarolo 6448018 FaenzaItaly CNR-IMM Institute for Microelectronics and MicrosystemsVia Gobetti 10140129 BolognaItaly Institute of Technical Sciences of SASA Knez Mihailova 35/IV11000 BelgradeSerbia Department of Materials Science and Engineering EEBEUniv.Politècnica de Catalunya-BarcelonaTECH.Avda.Eduard Maristany 1608019 BarcelonaSpain Department of Materials Science and Engineering Missouri University of Science and TechnologyRollaMO 65049USA

Multi-phase ceramics based on ZrB_(2),TiB_(2) and doped with CrB_(2) and SiC were prepared by powder metallurgy and hot pressing to explore the possibility of obtaining multi-scale microstructures by super-saturation of complex(Zr,Ti,Cr)B_(2) solid ***-shell structures formed in TiB_(2) grains,whereas ZrB_(2) appeared to form a homogeneous solid solution with the other *** of nano-inclusions within both micron-sized borides was assessed by transmission electron microscopy and thermodynamics elucidated the preferential formation of boride inclusions due to the specific sintering *** addition,atomic size factors explicated the precipitation of CrB_(2) nano-particles into ZrB_(2)-rich grains and of ZrB_(2) nano-particles into TiB_(2)-rich *** hardness of the constituent phases measured by nanoindentation ranged from 36 to 43 GPa.

关键词： boride core-shell solid solution nanoindentation sintering

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Management of“Wall to Wall Heart”in a Transient Neonatal Tricuspid Regurgitation

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Congenital Heart Disease 2021年第3期16卷 205-210页

作者： Elio Caruso Silvia Farruggio Davide Calvaruso David Fabio Petruccelli David Angel ortiz Ruiz Corrado Di Mambro Salvatore Agati Mediterranean Pediatric Cardiology Center“Bambino Gesù” San Vincenzo HospitalTaorminaItaly

We present a case of a one-day-old newborn,without prenatal diagnosis,referred to our cardiologic intensive care unit in critical condition presenting sub-cyanosis and peripheral oxygen saturation of 80%.Echocardiography diagnosis was tricuspid valve dysplasia with severe regurgitation,functional pulmonary valve atresia with intact ventricular septum and reversal flow in the large patent ductus arteriosus(PDA).Chest X-ray showed severe cardiomegaly and wall to wall *** E1 infusion was started once after *** few days,clinical conditions progressively worsened because of right heart failure;a first pharmacological approach to close PDA failed and surgery ligation of PDA was necessary to restore anterograde pulmonary flow and heart size.

关键词： Wall to wall heart tricuspid regurgitation pulmonary atresia arterial duct

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