Time filter

Source Type

Gomes V.,University of Sao Paulo | Passos M.J.A.C.R.,University of Sao Paulo | Rocha A.J.S.,University of Sao Paulo | Santos T.C.A.,University Monte Serrat | And 2 more authors.
Brazilian Journal of Oceanography | Year: 2013

Changes in environmental factors may deeply affect the energy budget of Antarctic organisms as many of them are stenothermal and/or stenohaline ectotherms. In this context, the aim of this study is to contribute to knowledge on variations in the energy demand of the Antarctic amphipod, Gondogeneia antarctica as a function of temperature and salinity. Experiments were held at the Brazilian Antarctic Station "Comandante Ferraz", under controlled conditions. Animals collected at Admiralty Bay were acclimated to temperatures of 0°C; 2.5°C and 5°C and to salinities of 35, 30 and 25. Thirty measurements were made for each of the nine combinations of the three temperatures and three salinities, totalling 270 measurements. Metabolic rates were assessed by oxygen consumption and total nitrogenous ammonia excretion, in sealed respirometers. When acclimated to salinities 30 or 35, metabolic rates at 0°C and 2.5°C were very similar indicating a possible mechanism of metabolic compensation for temperature. At 5.0°C, however, metabolic rates were always higher. Lower salinities enhanced the effects of temperature on metabolism and ammonia excretion rates. The physiological adaptations of individuals of G. antarctica suggest adaptive mechanisms for energy saving, adjusted to an environment with stable conditions of temperature and salinity. Little is known about the joint effects of salinity and temperature and this study is an important contribution to the understanding of the mechanism of polar organisms in their adaptation to both factors.

Peres R.C.,University Monte Serrat | Hirata R.,University Monte Serrat | Claudio S.R.,University Monte Serrat | Liz T.,University Monte Serrat | And 2 more authors.
Journal of Pharmacy and Nutrition Sciences | Year: 2012

Several studies has pointed that red wine diet, rich in polyphenols, has several effects like vasodilation, possible antioxidant effect, decrease of cellular events of atherosclerosis, decrease of blood pressure, and reduction of cardiovascular risks. This paper proposes an investigation of the effects of a 21 days diet of 200 ml dialy of red dry wine for markers of muscle injury such as CK and CK-MB, besides cholesterol and its fractions, LDL and HDL, and triglycerides, in normal subjects. The results showed decreased levels of plasma total cholesterol and LDL, and a tendency to increased levels of HDL, what suggests red dry wine has effects on decrease cardiovascular risks. However, significant increase of cardiac CK-MB isoenzyme was observed what could point to increase the oxidation of muscle tissues. It can be concluded that, despite the CK-MB increase, red dry wine can be considered as a tool to decrease cardiovascular diseases risks. © 2012 Lifescience Global.

Peres R.C.,Federal University of Sao Paulo | Peres R.C.,University Monte Serrat | Gollucke A.P.B.,Federal University of Sao Paulo | Soares C.,University Monte Serrat | And 7 more authors.
International Journal of Food Sciences and Nutrition | Year: 2015

The aim of this study was to investigate the phenolic composition of a natural food colourant (G8000™) as well as its effects on plasma markers after 28-day consumption by healthy individuals at a dietary dose (70g). Parameters of total cholesterol and its fractions, triglycerides and plasma enzymes biomarkers of muscle injury were measured. Major compounds identified in G8000™ by ESI-MS showed the presence of anthocyanins, organic acids, phenolic acids as well as monosaccharides. HDL levels significantly increased from 43 ± 10.2 mg/dL to 95 ± 16.9 mg/dL. LDL levels significantly decreased from 110 ±40.9 mg/dL to 69 ± 39 mg/dL (p < 0.001). No significant statistical differences (p > 0.05) were observed for total cholesterol, triglycerides and VLDL. After the intake, plasma enzyme CK-MB decreased from 20 ± 12.1 U/L to 10 ± 1.9 U/L while LDH levels increased from 275 ± 124.4 U/L to 317 ± 114.7 U/L (p < 0.005). No significant differences were observed for CK levels. Taken together, dietary intake of natural colourant G8000™ was able to exert beneficial effects on atherosclerosis biomarkers. © 2015 Informa UK Ltd.

Discover hidden collaborations