Limnoperna fortunei, an Asiatic rivers bivalve has become a worldwide problematic invasive species causing several water quality and macrofouling problems. In the Neotropical region it was first recorded in 1991 in the Rio de la Plata coast, Buenos Aires province. Since this, it showed a quick upstream invasion into the principals aquatic systems of the Plata Basin. Nevertheless, there is not a...

Individual dry weight and carbon content, ingestion rate, growth rate and production rate were determined for different developmental stages of Artemia franciscana feeding on six different concentrations of Isochrysis galbana (Tahiti). The cultures were grown at nearly constant food 21 concentrations, ranging from 0.2 to 20 mg C l for 12 days at a temperature of 26–288C and 34 ppt salinity. The...

The present study evaluates the feasibility of using Artemia franciscana in reducing the Ni concentration of synthetic wastewater by the process of bioaccumulation. Metallothionein protein plays a key role in the uptake of nickel by Artemia. Artemia (Brine shrimp) was exposed to an initial nickel concentration of 40 mg/L. Gradual decrease of nickel was observed from 40 mg/L to 5 mg/L with a rem...

A catalog of the 161 type specimens of species of Hemiptera Cicadidae housed in the collection of the Entomology Division of the Museo de La Plata is presented. This collection represents 52 species grouped in 19 genera. For each species the original and current names, bibliographic references, type category, number of specimens, gender, Museo de La Plata code numbers, and transcription of data...

(1. LPS, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China; 2. Chairman of ISJS, Le Chardon, Quartier Brugiere, 07200 Vogue, France; 3 . Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W, Palisades, New York 10964-1000, USA; 4 . Department of Regional and Petroleum Geology, Polish Geological Institute, Rakowiecka 4, 00-975 Wars...

Erratum to `̀ Pharmacokinetics and penetration into tissue ̄uid of ceftizoxime in normal and hyperthemic sheep'' [Small Rumin. Res. 37 (2000) 43±49] Roberto Rule, RauÂl Lacchini, GermaÂn Quiroga, Laura Moreno, Perla de Buschiazzo ComisioÂn de Investigaciones Cientõ ®cas de la Provincia de Buenos Aires, CaÂtedra de Farmacologia, Facultad de MeÂdicina, U.N.L.P., Calle 60 y 120, 1900 La Plata, Arge...

We recently discovered pathways of lumisterol (L3) activation by CYP11A1 and CYP27A1, with resulting CYP11A1-derived hydroxymetabolites being detectable in the human serum epidermis. hydroxylumisterols induced keratinocyte differentiation photoprotective actions against UVB. In follow-up studies we detected hydroxyproducts CYP27A1 action on L3, 25(OH)L3, 25R27(OH)L3 25S27(OH)L3, epidermal kerat...

OSCAR CALVO, CICpBA, L.E.I.C.I., Departamento de Electrotecnia, Facultad de Ingenierı́a, Universidad Nacional de La Plata, 1900 La Plata, Argentina JULYAN H. E. CARTWRIGHT,y Instituto Andaluz de Ciencias de la Tierra, IACT (CSIC-UGR), E-18071 Granada, Spain DIEGO L. GONZÁLEZ,z Istituto Lamel, CNR, I-40129 Bologna, Italy ORESTE PIRO,x Institut Mediterrani d’Estudis Avançats, IMEDEA (CSIC–UIB), E-...