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Cricetidae; breeding; chromosomes; females; fever; laboratory animals; males; mice; monogamy; pregnancy; reproductive performance; sex ratio; sexual maturity; voles; weaning; Argentina
Abstract:
... Akodon molinae, a vole mouse widely distributed in central Argentina, shows remarkable chromosome polymorphisms. It is one of the natural reservoirs of the actiologic agent of haemorrhagic fever, and a laboratory colony could be of great help in investigating this disease. Pregnancy lasted 23 (range 21-25) days. Litters of 4-5 young were born to monogamous breeding pairs about every 30 days, with ...
... A blocking enzyme-linked immunosorbent assay (ELISA) using a urease conjugate (U-B-ELISA) was evaluated for screening sera for antibodies to pseudorabies virus under field conditions. A total of 764 serum samples were analyzed by U-B-ELISA. Of these, 264 were evaluated by both virus neutralization and U-B-ELISA, and the results were compared. U-B-ELISA showed 98.5% and 98.9% sensitivity and specif ...
... We have analysed complete or partial VP1 sequences of 31 foot-and-mouth disease (FMD) viruses belonging to serotypes A, O and C to determine the genetic relatedness of field strains of FMD virus (FMDV) that have circulated in Argentina between 1961 and 1994. Phylogenetic analysis, which also included 15 previously published Argentinean sequences and six reference strains, revealed that (i) FMD typ ...
air pollution; coastal soils; cohesion; copper; effluents; estuaries; hydrocarbons; hydrophobicity; industrial wastes; lead; marshes; micelles; pipes; porosity; raw materials; redox potential; resistance to penetration; soil sampling; sulfates; sulfides; waste disposal; water flow; zinc; Argentina
Abstract:
... The Bahía Blanca Estuary is located in southern Buenos Aires province, Argentina. The area is linked to a petrochemical industrial complex, whose raw materials and final products contaminate the surrounding areas via atmospheric pollution and effluents, which are dumped in the estuary waters. To establish the effects of the industrial waste disposal on the nearest coastal soils, 17 samples were ta ...
Leunda, Maria R., et al. ; Odeon, Anselmo C.; Risatti, Guillermo; Kaiser, German G.; Odriozola, Ernesto; Campero, Carlos M.; Donis, Ruben O.; Show all 7 Authors
... The objective of the present work is the description outbreaks caused by bovine viral diarrhea virus (BVDV) in commercial beef cattle ranches in Argentina. Genetic affiliation and their association with the clinical manifestation were carried out with five BVDV isolates from an outbreak of mucosal disease (MD) (Outbreak #1), acute enteritis (Outbreaks #2 and #3) and generalized dermatitis (Outbrea ...
... Ellagic acid is a phenolic compound which occurs naturally in strawberries. Interest in ellagic acid has increased during the past few years owing to its properties as a micronutrient. The objective of this study was to determine the ellagic acid content in strawberries compared with that in other common fruits and to evaluate its variability, the effects of ripening stage, and the tissue and seas ...
Mentha piperita nothosubsp. piperita; crop yield; field experimentation; flowering; leaves; planting; shoots; spring; stolons; summer; winter; Argentina
Abstract:
... The effect of two propagation methods (use of stolons in winter and shoots in spring) on the yield of fresh and dried leaves of peppermint (Mentha Xpiperita L.) was studied in a field experiment in the La Plata zone of Argentina. Fresh and dry weights were greater for plants propagated from stolons in winter and harvested in summer (in full bloom and post-bloom) and from shoots planted in spring i ...
... A serologic subgroup of bovine leukemia virus (BLV) has not been identified, whereas genetic diversity among BLVs has been reported by polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP). To investigate the distribution of BLV provirus variants, 42 isolates from Argentina and Japan were examined by nested PCR for a segment of the env gene, followed by DNA sequencing. Th ...
Maria José Martínez, et al. ; Julio L. Dardanelli; Mónica Balzarini; Martha Cuniberti; Silvia Resnik; Silvina F. Ramunda; Rosana Herrero; Hector Baigorri; Show all 8 Authors
Glycine max; soybeans; maturity groups; genotype; genotype-environment interaction; agroecosystems; crop yield; seed oils; protein content; lipid content; crop quality; data analysis; plant adaptation; Argentina
Abstract:
... Argentina is the largest soybean [Glycine max (L.) Merrill] meal and oil exporter in the world, with crops covering a 23° to 39° S latitude range, allowing the presence of genotypes from different maturity groups (MG). Multi-environment yield trials (MET) for commercial cultivars are conducted each year across the crop area. The aim of this paper was to evaluate the consistency of MG effects and i ...
... To evaluate whether observed geographical shifts in the distribution of the blue-winged macaw (Primolius maracana) are related to ongoing processes of global climate change. This species is vulnerable to extinction and has shown striking range retractions in recent decades, withdrawing broadly from southern portions of its historical distribution. Its range reduction has generally been attributed ...
... Phaffia rhodozyma (sexual form, Xanthophyllomyces dendrorhous) is a basidiomycetous yeast that has been found in tree exudates in the Northern Hemisphere at high altitudes and latitudes. This yeast produces astaxanthin, a carotenoid pigment with biotechnological importance because it is used in aquaculture for fish pigmentation. We isolated X. dendrorhous from the Southern Hemisphere (Patagonia, A ...
... In Argentinean crop fields, weed control is mainly achieved by intense use of glyphosate as a nonselective and/or selective herbicide. Glyphosate use is very high as more than 95%% of the 16 million ha soybean crop consists of glyphosate-resistant cultivars, always treated with this herbicide. From initial success, inconsistent glyphosate control of Johnsongrass, an invading C4 perennial grass of ...
... Nematology , 2007, Vol. 9(6), 903-905 Short communication Infection rate of different generations of infective juveniles (IJ) of Steinernema rarum (Doucet, 1986) Mamiya, 1988 (Steinernematidae; Rhabditida) from the province of Córdoba, Argentina Cecilia G. R IVEROS 1 , ∗ , Marcelo E. D OUCET 1 , Maria A. B ERTOLOTTI 1 and Julio A. D I R IENZO 2 Entomopathogenic nematodes of the family Steinerne- m ...
... Fifty-six Malbec wines from seven Argentine viticulture regions (Valles Calchaquíes, Mendoza del Este, Mendoza del Sur, Patagonia, Alto Río Mendoza, Valle de Uco and San Juan), of the 2004 vintage, were evaluated by sensory descriptive analysis using a panel of 10 not-sighted assessors. "Noncommercial" samples were obtained using standardized conditions, not aging and produced with grapes corres ...
water pollution; lowlands; streams; biofilm; oxygen consumption; biochemical oxygen demand; community structure; water quality; water analysis; physicochemical properties; Argentina
Abstract:
... The structural features and O₂ consumption of the epipelic biofilm in streams of the Pampean plain were explored. The study was conducted in three lowland streams subjected to different anthropic disturbances. Three sampling sites were selected in different sectors of these streams considering land use intensity (high, moderate, and low). Samples of the water and of the epipelic biofilm were taken ...
... The construction of small dams in principal streams is one of the most common forms of regulation in the province of San Luis since they cause changes of physical, chemical and biological nature downstream. The purpose of this study was to analyze the short-term modifications in the food organization of benthic macroinvertebrates communities due to the construction of a dam in the Grande River (Sa ...
Camellia sinensis; fatty acids; polyphenols; nutrient content; vitamin content; wheat; food composition; qualitative analysis; tomatoes; carotenoids; mineral content; quantitative analysis; genetically modified foods; corn; black tea; in vitro studies; antioxidant activity; antioxidants; ascorbic acid; naringenin; green tea; transgenic plants; tea (beverage); dietary minerals; Argentina
Abstract:
... The genetic modification in fruit and vegetables could lead to changes in metabolic pathways and, therefore, to the variation of the molecular pattern, with particular attention to antioxidant compounds not well-described in the literature. The aim of the present study was to compare the quality composition of transgenic wheat (Triticum durum L.), corn (Zea mays L.), and tomato (Lycopersicum escul ...
... The grasshopper Dichroplus elongatus Giglio Toss is an example of a species with widespread B-chromosome polymorphism. We detected in males considerable variation in adult size, and part of this variation is associated with the polymorphism for B-chromosomes that has a negative effect on male body size. The analysis of fitness components revealed that B-carriers are negatively selected during mati ...
... How interactions between exotic species affect invasion impact is a fundamental issue on both theoretical and applied grounds. Exotics can facilitate establishment and invasion of other exotics (invasional meltdown) or they can restrict them by re-establishing natural population control (as predicted by the enemy-release hypothesis). We studied forest invasion on an Argentinean island where 43 spe ...