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Evaluation of Cuban Bacillus thuringiensis(Berliner,1911)(Bacillales:Bacillacea)isolates with larvicidal activity against Aedes aegypti(Linnaeus,1762)(diptera:Culicidae)

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Asian Pacific Journal of Tropical Medicine 2022年第2期15卷 79-86页

作者： Aileen Gonzalez Rizo Camilo E Castañet Martinez Celeste Ramírez Cardentey Ariamys Companioni Ibañez zulema menéndez díaz Lianet Monzote Fidalgo Hilda M HernandezÁlvarez Vector Control department Institute of Tropical MedicinePedro KouríAutopistaNovia del Mediodía km 6½La Habana 11400Cuba Virology department Institute of Tropical MedicinePedro KouríAutopista Novia del Mediodía km 6½La Habana 11400Cuba Parasitology department Institute of Tropical MedicinePedro KouríAutopista Novia del Mediodía km 6½La Habana 11400Cuba

Objective:To evaluate 11 Cuban native Bacillus(B.)thuringiensis isolates in order to select one with the best larvicidal activity against Aedes(Ae.)aegypti and low ***:The cry and cyt genes of the isolates(A21,A51,L95,L910,M29,R84,R85,R87,R89,U81 and X48)were amplified by *** influence of organic matter and NaCl on the larvicidal activity was tested by *** was assayed on peritoneal macrophages of BALB/c ***:The cyt1(Aa,Ab,Ba),cyt2,cry4aA,cry4Ba,cry11(Aa,Ba,Bb)and cry10 genes were identified in all native Cuban *** larvicidal activity(LC_(90))of seven isolates was affected by the presence of organic matter in the water,while A21,A51,L910,R84,U81 and X48 had better LC_(50),LC_(90),LC_(95) than the 266/29-Ⅶ-98 control *** LC_(50) of two isolates was affected by the presence of NaCl and A21,A51,R85 isolate had better larvicidal activity than the 266/29-Ⅶ-98 control *** terms of toxicity against macrophages,the extracts of nine isolates were less cytotoxic than the control ***:Native isolate A21 had the main virulence factors against *** larvae,displayed a good larvicidal activity in presence of different factors related with *** breeding sites,and had low citotoxicity against *** results can contribute to the improvement of existing biological control strategies and the development of new biolarvicides.

关键词： Mosquitoes Biological control agent Bacillus thuringiensis Bioassays Aedes aegypti cry and cyt genes

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Controlling Molecular Packing in Aqueous Metallosupramolecular Self-assembly by Ligand Geometry

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Precision Chemistry 2023年第5期1卷 332-340页

作者： Papri Sutar Torsten dunnebacke zulema Fernández Timo Krüer Christina Rest Gustavo Fernández Organisch-Chemisches Institut Westfälische-Wilhelms Universität Münster48149 MünsterGermany

The coordination geometry of d8 transition metal complexes has been successfully exploited as a tool to tune photophysical properties and self-assembly pathways of supramolecular polymerization processes,with a focus being primarily placed on organic *** such controlled supramolecular and photophysical properties to assemblies in aqueous media by molecular design is,however,still challenging due to the difficulty in programming noncovalent interactions in ***,we tackle this challenge by analyzing the aqueous self-assembly of amphiphilic Pt(II)complexes of different molecular geometry in order to control self-assembly and metal−metal interactions in aqueous *** this end,we have designed two Pt(II)complexes,1 and 2,containing an identical oligophenyleneethynylene(OPE)-based aromatic scaffold that differ in the molecular geometry(linear vs V-shaped)imposed by ligand substitution and studied their comparative self-assembly behavior in aqueous *** though both molecules follow the isodesmic mechanism of self-assembly,their structural difference strongly influences the molecular packing in aqueous media,which in turn impacts the photophysical properties(*** or presence of MMLCT)and the self-assembly *** the molecular geometry for 2 enforces short Pt…Pt contacts driven by an efficient face-to-face stacking of the OPE backbone,the antiparallel packing of 1 with slight translational offset does not allow the formation of short Pt…Pt *** a distinct interplay of interactions for 1 and 2 in aqueous media leads to significant differences in photoluminescence.

关键词： Self-assembly supramolecular polymerization amphiphilic systems π-conjugated systems Pt(II)complexes

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The Use of the ICTs in the Value Chain Proce,;ses and Their Impact on Organizational Performance

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Chinese Business Review 2016年第9期15卷 437-446页

作者： zulema Cordova Ruiz Sosima Carrillo Loreto Maria Bravo Zanoguera Jessica Lizbeth Cisneros Martinez Autonomus University of Baja California Mexicali Mexico

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Liver Lead Levels in Snow Goose (Chen caerulescens) in a Wetland near the City of durango, Mexico

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Open Journal of Animal Sciences 2015年第1期5卷 30-35页

作者： Martín Emilio Pereda-Solís Alicia zulema Cárdenas González José Hugo Martínez Guerrero Luis Francisco Sánchez Anguiano Federico Rosales Alférez Facultad de Medicina Veterinaria y Zootecnia Cuerpo Académico de Fauna Silvestre Universidad Juárez del Estado de Durango Durango México Instituto de Investigaciones Científicas Universidad Juárez del Estado de Durango Durango México

The use of lead in ammunition for hunting exposes waterfowl to lead poisoning (plumbism) by accidental consumption of shotgun pellets. To test this hypothesis we sampled 18 liver tissue samples of Snow Goose (Chen caerulescens) collected during the 2012-2013 hunting season in a wetland near the city of durango, Mexico. We quantified liver lead levels using an atomic absorption spectrophotometer and portions of liver were fixed and stained for their histological study. Average lead concentration (in dry weight) were under the normal range (mean = 0.73 ± 0.2, standard error) which do not represent any risk of poisoning. Liver tissue injuries were not observed in the histopathological analysis, suggesting no reaction to a xenobiotic agent such as lead. Gastrointestinal content analysis showed lead pellet in the gizzard of one individual, but we could not find a relationship between pellet ingestion and lead concentration in the liver. Although the results did not provide evidences of lethal or sublethal effects caused by lead poisoning, they show a possible risk due to the presence of lead pellets in the digestive tract.

关键词： Snow Goose Chen caerulescens Lead Poisoning Lead Pellets Ingestion Lead Concentration Liver

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