S. Lavarías

ORCID: 0000-0003-1732-2092
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About
Contact & Profiles
Research Areas
  • Environmental Toxicology and Ecotoxicology
  • Aquaculture Nutrition and Growth
  • Pesticide Exposure and Toxicity
  • Insect Resistance and Genetics
  • Mollusks and Parasites Studies
  • Cholinesterase and Neurodegenerative Diseases
  • Crustacean biology and ecology
  • Lipid metabolism and biosynthesis
  • Helminth infection and control
  • Insect Utilization and Effects
  • Pesticide and Herbicide Environmental Studies
  • Essential Oils and Antimicrobial Activity
  • Physiological and biochemical adaptations
  • Peroxisome Proliferator-Activated Receptors
  • Metabolomics and Mass Spectrometry Studies
  • Environmental Chemistry and Analysis
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Trypanosoma species research and implications
  • Animal Behavior and Reproduction
  • Algal biology and biofuel production
  • COVID-19 Clinical Research Studies
  • Insect Pest Control Strategies
  • Aquatic Invertebrate Ecology and Behavior
  • Entomopathogenic Microorganisms in Pest Control
  • Insect and Pesticide Research

Universidad Nacional de La Plata
2011-2024

Consejo Nacional de Investigaciones Científicas y Técnicas
2013-2024

Instituto Nacional de Limnología
2020-2022

Centro Científico Tecnológico - San Juan
2020

Biochemistry Research Institute of La Plata
2005-2011

The chemical control of the Chagas disease vector Triatoma infestans is endangered by emergence pyrethroid resistance. An effective alternative tool use entomopathogenic fungus Beauveria bassiana. effect deltamethrin on fungal growth, gene expression and enzyme activity in relation to detoxification, antioxidant response oxidative stress levels was studied evaluate tolerance deltamethrin.The mean inhibitory concentration (IC50 ) 50 µg deltamethrin/cm(2). Cytochrome P450 genes were...

10.1002/ps.3583 article EN Pest Management Science 2013-05-28

10.1016/j.cbpb.2011.08.006 article EN Comparative Biochemistry and Physiology Part B Biochemistry and Molecular Biology 2011-08-30

Abstract The site of synthesis mollusc lipoproteins is hitherto unknown and was investigated for perivitellin 2 (PV2), an egg lipoprotein found in the freshwater snail Pomacea canaliculata . Tissues (albumen gland, gonad–digestive gland complex, muscle) from vitellogenic females were incubated vitro with 14 C‐leucine at 25°C 12 hr. At end incubation, soluble proteins tissue homogenates medium analyzed de novo protein by electrophoresis HPLC, radiolabeled quantified liquid scintillation. Two...

10.1002/jez.10043 article EN Journal of Experimental Zoology 2002-01-16

Abstract The effect of the water‐soluble fraction (WSF) crude oil on lipid contents, classes, FA, and PC molecular species was studied in high‐phospholipid (hepatopancreas) low‐phospholipid (egg) tissues a freshwater crustacean. After 21‐d exposure to sublethal concentration WSF, significant decrease shrimp total lipids observed, although no alterations could be detected hepatopancreas or egg contents. TAG/phospholipid ratios increased decreased eggs, suggesting either mobilization TAG...

10.1007/s11745-005-1408-y article EN Lipids 2005-05-01

Summary Embryo morphometry and developing time from just-laid eggs until hatching were described in the palaemonid prawn, Macrobrachium borellii, using a rapid non-invasive staging method. Embryos kept laboratory under controlled conditions development divided into seven stages according to major morphological characteristics. This lecithotrophic, freshwater shrimp has highly abbreviated type of after 39 ± 2 days as postlarvae at 24°C. Morphometry was recorded stereoscopic microscope with an...

10.1080/07924259.2002.9652747 article EN Invertebrate Reproduction & Development 2002-09-01

Hemocyanin of the spider Polybetes pythagoricus, in addition to its typical role as an oxygen transporter, also exhibits a phenoloxidase activity induced by micellar concentrations SDS. In present work, we found kinetic parameters Km and Vmax pythagoricus hemocyanin (PpHc) PO be 0.407 mM 0.081 µmolmin(-1) mg protein(-1) , respectively. Dopamine was used substrate with SDS at final concentration 10 30-min incubation 25°C. Conformational changes Hc associated treatment were analyzed using...

10.1002/jez.1947 article EN Journal of Experimental Zoology Part A Ecological Genetics and Physiology 2015-07-01

The aim of this study was to evaluate the effects last generation insecticide spirotetramat (STM) on embryos and larvae freshwater prawn Macrobrachium borellii. Both were exposed serial dilutions STM determine LC50 values. After 96-h exposure, live fixed for histological analysis. In addition, ovigerous females a sublethal concentration (1.7 mg/L) 96 h activity enzymes catalase, glutathione-S-transferase, superoxide dismutase as well lipoperoxidation (LPO) protein oxidation levels in...

10.1016/j.ecoenv.2022.114257 article EN cc-by-nc-nd Ecotoxicology and Environmental Safety 2022-11-16
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