Mandibular gland secretion of Melipona beecheii: chemistry and behavior.

The mandibular gland secretion of Melipona beecheii contains a rich mixture of terpenoid and oxygenated compounds and unsaturated and saturated hydrocarbons. However, it differs markedly from the 11 other Brazilian species examined in previous studies, both by the absence of 2-heptanol and the presence of rose oxides. The most abundant compound was geranyl hexanoate, whereas the most volatile compounds were cis- and trans-rose oxide and geraniol.

[Effectiveness of a multifactorial strategy for implementing clinical guidelines on unstable angina: cluster randomized trial].

Unlabelled: INTRODUCTION AND OBJECTIVES. Clinical practice in unstable angina is not always based on best evidence. Guidelines have the potential to improve quality of health care.

Risk of venous thromboembolic disease in women A qualitative systematic review.

Objectives: To review the scientific evidence on the risk and prevention of venous thromboembolic disease (VTD) associated with specific clinical factors in women.

Study Design: Qualitative systematic review.

Data Source: MEDLINE, Cochrane library, clinical practice guidelines, and referenced articles from these sources.

[Basic aspects and measurement of the antioxidant vitamins A and E].

Vitamin E usually works as a biological antioxidant, preventing the oxidation of polyunsaturated fatty acids and proteins, for which it is considered an important protective factor in the development of diseases related to oxidative processes. Beyond its antioxidant properties, it has been involved also in genetic expression, mitochondrial metabolism, cell differentiation and immune system regulation. From the point of view of its antioxidant protection properties, values > or = 1200-1300 micrograms/dL are considered optimum levels (standardized according to plasmatic lipid levels).