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Agricultural Sciences 2015年第9期6卷 1014-1022页

作者： Jose Luis Arredondo-Figueroa Laura Georgina Nunez-García Jesus T.Ponce-Palafox irene de los angeles barriga-sosa Unidad Acuícola Departamento de ZootecniaUniversidad Autonoma de AguascalientesAguascalientesMéxico Planta Experimental de Produccion Acuicola Division de Ciencias Biológicas y de la SaludDepartamento de HidrobiologíaUniversidad Autónoma Metropolitana IztapalapaMéxicoD.F.México Centro de Innovación y Transferencia Tecnológica CENITT Posgrado CBAPEscuela Nacional de Ingeniería PesqueraUniversidad Autónoma de NayaritTepicMéxico

We present results of a long-term study aimed to optimize Nile tilapia O. niloticus production in a recirculating aquaculture system (RAS) in México City. Three experiments were evaluated: 1) fry production;2) production of masculinized fries;and 3) assessment of growth under three different densities (10, 30 and 75 fish/m3). The broodstock produced on average 2400 ± 600 fry every 15 days during six months, with a total production of 28,800 ± 2000. One hundred percent males were produced in 274-L raceways in an eight-week period. The obtained results in fish production in the RAS system indicated variations related to density. A daily growth rate of 3.6 g/day was registered with a density of 10 fish/m3, 0.9 g/day in 30 fish/m3 and 0.4 g/day in 75 fish/m3. This information could be useful for production purposes in this type of systems.

关键词： Tilapia Oreochromis niloticus Intensive Culture Sex Reversal Growth densities

Evaluation of Growth Performance of a Genetically Characterized F1 Rainbow Trout,Oncorhynchus mykiss in a Recirculating Aquaculture System

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Agricultural Sciences 2017年第7期8卷 716-728页

作者： Jose Luis Arredondo-Figueroa Nayeli Ismene Armendáriz-Sáenz Laura Georgina Núnez-García Jesús Trinidad Ponce-Palafox irene de los angeles barriga-sosa Posta Zootécnica Departamento de ZootecniaCentro de Ciencias AgropecuariasUniversidad Autónoma de AguascalientesJesús MaríaMéxico Planta experimental de Producción Acuícola Departamento de HidrobiologíaDivisión de Ciencias Biológicas y de la SaludUniversidad Autónoma Metropolitana IztapalapaIztapalapaMéxico Escuela Nacional de Ingeniería Pesquera Unidad de Bioingeniería CosteraUniversidad Autónoma de NayaritSan BlasMéxico

The growth performance of a selected F1 rainbow trout genetically characterized as polymorphic with locus Omy207UoG (NA = 13, PIC = 0.891, HE = 0.9003) was evaluated in a recirculating aquaculture system (RAS). A set of 157 rainbow trout of 37.8 g of mean body weight and 14.6 cm mean total length per tank, were introduced in each of six fish tank of 5 m3 connected to a recirculating aquaculture system (RAS). The trout was rearing during 317 days. Growth performance indicators and water quality were evaluated during the experiment. The genetically selected F1 rainbow trout showed a tendency towards homogeneity in growth performance along the culture period, reaching a mean total weight of 552.2 g. The length-weight relationship indicated an isometric growth (>3.0). This study presents the basis to establish a long-term marker-assisted selection program for rainbow trout culture in a subtropical region.

关键词： Rainbow Trout Oncorhynchus mykiss Genetically Characterized Growth Performance Water Quality

Movement initiation of millimeter particles on a rotating rough surface: The role of adhesion

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Particuology 2020年第6期18卷 92-99页

作者： Karina de los angeles Valenzuela Aracena Rodolfo O.Unac irene Ippolito Ana M.Vidales INFAP CONICETDepartamento de FisicaFacultad de Ciencias Fisico Matematicas y NaturalesUniversidad Nacional de San LuisEjercito de los Andes 950D5700HHWSan LuisArgentina Universidad de Buenos Aires Facultad de IngenieriaGrupo de Medios PorososPaseo Colon 850C1063ACV Buenos AiresArgentina

We performed experiments to determine the critical moment for movement initiation of a millimeter bead on a rotating rough *** corresponding critical angular velocities were measured for glass and stainless-steel ball bearings over two different rough surfaces with glued glass beads.A basic theoretical analysis was developed to explain the observed *** the expectation of a simple approach with the presence of the obstacles offered by a rough surface could be sufficient to describe the problem,we prove here that the sole con sideration of these obstacles,and even friction,are insufficient to explain the results in the range of a few-millimeter glass *** the thermodynamic work of adhesion between surfaces is significant,the adhesion forces must be considered in the force balance for particle detachment:.This effect is a determinant for describing theoretically and numerically the dynamics of millimeter particles.

关键词： detachment Adhesion Centrifugation

New concepts for generating interspecies chimeras using human pluripotent stem cells

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Protein & Cell 2022年第4期13卷 234-238页

作者： Alejandro de los angeles Jun Wu department of Psychiatry Yale University School of MedicineNew HavenCTUSA department of Molecular Biology University of Texas Southwestern Medical CenterDallasTXUSA Hamon Center for Regenerative Science and Medicine University of Texas Southwestern Medical CenterDallasTXUSA

The worldwide paucity of transplantable organs for patients is a devastating *** different approaches have been conceived to address this donor organ shortage,one strategy that has garnered significant attention recently is the prospect of producing human organs in animals through a technique called interspecies blastocyst complementation based on the generation of interspecies *** blastocyst complementation works by injecting pluripotent stem(PS)cells from one species into organogenesis-disabled blastocysts of another species(Kobayashi et al.,2010).As the chimeric embryo develops,donor cells can fill the vacated developmental organ niche and enrich in a target organ of *** principle,interspecies blastocyst complementation may one day allow the generation of human organs inside ***,some ethical issues concerning research and potential human clinical use with chimeras persist(Hyun,2019).

关键词： organs donor generating

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Isolation and Characterization of 26 Microsatellite Loci for the Shortfin Silverside Fish <i>Chirostoma humboldtianum</i>Valenciennes1835 (Atherinopsidae: Menidiinae) derived from Next Generation Sequencing and Their Cross-Amplification in Central Mexican Atherinopsids

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Open Journal of Genetics 2014年第5期4卷 355-361页

作者： barriga-sosa irene de los angeles Rosa María García-Martínez Jhoana Díaz-Larrea Oscar Adrián Lozano Garza Francisco Javier García-de-León departamento de Hidrobiología Universidad Autónoma Metropolitana Iztapalapa México D.F. México Laboratorio de Genética y Biología Molecular Planta Experimental de Producción Acuícola Departamento de Hidrobiología Universidad Autónoma Metropolitana Iztapalapa México D.F. México Laboratorio de Genéticapara la Conservación Centro de Investigaciones Biológicas del Noroeste Instituto Politécnico Nacional La Paz México

The endemic silverside fish C. humboldtianum is of great ichtyologycal, economical and cultural relevance in central Mexico and it has been suggested that it is among a group of other “peces blancos”, the most ancestral species. Here we characterized a set of 26 microsatellite loci from the species in order to further assess population and phylogeographic issues that aid in evaluating their highly impacted populations. From 58 primer pairs tested on specimens from Villa Victoria dam (Rio Balsas Basin), 26 loci positively amplified on the species and cross-primed on specimens of the closely related and threatened Poblana alchichica, C. promelas and C. riojai. Loci resolved medium and high genetic variation (mean NA = 14.3, SD = 9.38;mean HO & HE = 0.47, SD = 0.32 and 0.58, SD = 0.32, respectively) and it is expected that these polymorphic loci are also useful in studing threatened atherinopsid species.

关键词： Endemic Polymorphism Villa Victoria Poblana alchichica C. promelas C. riojai

dental-derived stem cells in tissue engineering:the role of biomaterials and host response

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Regenerative Biomaterials 2024年第1期3卷 17-26页

作者： Weihao Yuan Luiza de Almeida Queiroz Ferreira Bo Yu Sahar Ansari Alireza Moshaverinia Weintraub Center for Reconstructive Biotechnology Section of ProsthodonticsSchool of DentistryUniversity of CaliforniaLos AngelesLos AngelesCA 90095USA department of Restorative dentistry School of DentistryUniversidade Federal de Minas GeraisBelo HorizonteMinas GeraisBrazil Section of Restorative dentistry School of DentistryUniversity of CaliforniaLos AngelesLos AngelesCA 90095USA department of Bioengineering Henry Samueli School of Engineering and Applied SciencesUniversity of CaliforniaLos AngelesLos AngelesCA 90095USA

dental-derived stem cells(DSCs)are attractive cell sources due to their easy access,superior growth capacity and low *** can respond to multiple extracellular matrix signals,which provide biophysical and biochemical cues to regulate the fate of residing ***,the direct transplantation of DSCs suffers from poor proliferation and differentiation toward functional cells and low survival rates due to local ***,elegant advances in the design of novel biomaterials have been made to give promise to the use of biomimetic biomaterials to regulate various cell behaviors,including proliferation,differentiation and *** could be tailored with multiple functionalities,e.g.,*** is an emerging need to summarize recent advances in engineered biomaterials-mediated delivery and therapy of DSCs and their potential ***,we outlined the design of biomaterials for supporting DSCs and the host response to the transplantation.

关键词： dental-derived stem cells biomaterials host response tissue engineering

Environmental Occurrence of Selenium in Waters and Related Health Significance

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Biomedical and Environmental Sciences 1997年第2期10卷 292-299页

作者： JANE L. VALENTINE(School of Public Health, University of CalIfornia at los angeles, los angeles, CA 90024, USA) School of Public Health University of California at Los Angeles 90024 USA.

Appreciable amounts of selenium in spring and well waters can be found due to geological occurrence. Concentrations of as much as 400 9000 μg/l have been reported in U. S. *** levels are 8 to 180 times the current EPA drinking water standard and approximate dietary exposures of 4900μg in selenosis regions of China. Reviews of health significance of the elevated drinking water exposures to U. S. populations revealed elevated concentrations of selenium in urine and blood. A decrease in glutathione peroxidase activity in such instances was noted. However noticeable symptoms and signs seem absent in studies reviewed. A comparison of intake levels (diet or drinking water) to urinary excretion for residents of China and the U. S. produced a correlation coefficient, r = 0. 82 (P < 0. 01 ) for the three research studies available

关键词： In Am Environmental Occurrence of Selenium in Waters and Related Health Significance

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Posterior gut development in Drosophila:a model system for identifying genes controlling epithelial morphogenesis

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Cell Research 1998年第4期8卷 273-284页

作者： LENGYEL JUDITH A XUE JUN LIU (department of Molecular, Cell and developmental Biology University of California at los angeles, los angeles, CA USA, 90095-1606 USA) department of Molecular Cell and Developmental Biology University of California at Los Angeles Los Angeles USA

The posterior gut of the Drosophila embryo, consisting of hindgut and Malpighian tubules, provides a simple,well-defined system where it is possible to use a genetic approach to define components essential for epithelial *** review here the advantages of Drosophila as a model genetic organism, the morphogenesis of the epithelial structures of the posterior gut, and what is known about the genetic requirements to form these *** overview, primordia are patterned by expression of hierarchies of transcription factors; this leads to localized expression of cell signaling molecules, and finally, to the least understood step: modulation of cell adhesion and cell shape. We describe approaches to identify additional genes that are required for morphogenesis of these simple epithelia, particularly those that might play a structural role by affecting cell adhesion and cell shape.

关键词： Organogenesis cell rearrangement convergent extension hindgut Malpighian tubule

OPTIMAL COARSE GRID SIZE IN DOMAIN deCOMPOSITION

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Journal of Computational Mathematics 1994年第4期12卷 291-297页

作者： Tony Chan Jian-Ping Shao(department of Mathematics, University of Califoruia, los angeles, USA) University of California 美国

In most domain decomposition (DD) methods, a coarse grid solve is employed to provide the global coupling required to produce an optimal method. The total cost of a method can depend sensitively on the choice of the coaxse grid size H. In this paper, we give a simple analysis of this phenomenon for a model elliptic problem and a variant of Smith's vertex space domain decomposition method [11, 3]. We derive the optimal value Hopt which asymptotically minimises the total cost of method (number of floating point operations in the sequential case and execution time in the parallel case), for subdomain solvers with different complekities. Using the value of Hopt, we derive the overall complexity of the DD method, which can be significantly lower than that of the subdomain solver

关键词： UCLA OPTIMAL COARSE GRID SIZE IN DOMAIN deCOMPOSITION CAM

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JClic Crosswords in Chemistry Class

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Journal of Chemistry and Chemical Engineering 2015年第4期9卷 303-308页

作者： Maria de los angeles Montiel Montoya department of Chemistry National Preparatory School No. 4 National Autonomous University of Mexico Mexico 11870 Mexico

Eight crosswords made in JClic were applied to twenty nine students from group 654, in area 2, at ENP （national preparatory school） No. 4 （a national public high school） in order to review Unit 2 and introduce the following Unit of Chemistry IV. Two surveys were applied in scholars in order to evaluate： the application of crosswords and of ICT （information and communications technology）. The results show that students like ICT because it is a relaxing mechanism to learn, JClic games were also liked by the majority due to the team work, so it induces to considerable learning.

关键词： ICT JClic amusing teaching-learning activities crosswords organic chemistry.