Artigos Científicos 1662 results

Chá verde e efeitos à saúde – Artigo 03

Dissipation Pattern, Processing Factors, and Safety Evaluation for Dimethoate and Its Metabolite (Omethoate) in Tea (Camellia Sinensis) Residue levels of dimethoate and its oxon metabolite (omethoate) during tea planting, manufacturing, and brewing were investigated using a modified QuEChERS sample preparation and gas chromatography. Dissipation of dimethoate and its metabolite in tea plantation followed the first-order kinetic with a half-life of 1.08–1.27 d. Tea manufacturing ...

Chá verde e efeitos à saúde – Artigo 02

Comparative effects of selected plant polyphenols, gallic acid and epigallocatechin gallate, on matrix metalloproteinases activity in multidrug resistant MCF7/DOX breast cancer cells The aim of the study was to investigate the effect of selected polyphenols: gallic acid (GA) and epigallocatechin gallate (EGCG) on matrix metalloproteinase (MMP-2 and MMP-9) activity in multidrug resistant (MDR) human breast adenocarcinoma cells: MCF7/DOX cells and obtained recently in our laboratory ...

Chá verde e efeitos à saúde – Artigo 01

Anti-Cancer Effects of Green Tea by Either Anti- or Pro- Oxidative Mechanisms Tea derived from the leaves and buds of Camellia sinensis (Theaceae) is consumed worldwide. Green tea contains various components with specific health-promoting effects, and is believed to exert protective effects against diseases including cancer, diabetes and hepatitis, as well as obesity. Of the various tea components, the polyphenol catechins have been the subject of extensive investigation and among the ...

Nutrição e Fertilidade – Artigo 20

Zinc levels in seminal plasma and their correlation with male infertility: A systematic review and meta-analysis Zinc is an essential trace mineral for the normal functioning of the male reproductive system. Current studies have investigated the relationship between seminal plasma zinc and male infertility but have shown inconsistent results. Hence, we systematically searched PubMed, EMBASE, Science Direct/ Elsevier, CNKI and the Cochrane Library for studies that examined the relations...

Nutrição e Fertilidade – Artigo 19

Zinc Levels in Seminal Fluid in Infertile Males and its Relation with Serum Free Testosterone Introduction: The role of zinc is critical to reproduction potential. Seminal zinc is thought to be derived almost exclusively from prostatic secretions. Sperm motility is significantly influenced by zinc. Zinc deficiency has been linked with male sterility and subfertility. Aim: To assess the influence of seminal plasma zinc on seminogram characteristics and whether endogenous testosterone affects ...

Nutrição e Fertilidade – Artigo 18

The zinc spark is an inorganic signature of human egg activation Egg activation refers to events required for transition of a gamete into an embryo, including establishment of the polyspermy block,  completion of meiosis, entry into mitosis, selective recruitment and degradation of maternal mRNA, and pronuclear development. Here we show that zinc fluxes accompany human egg activation. We monitored calcium and zinc dynamics in individual human eggs using selective fluorophores following ...

Nutrição e Fertilidade – Artigo 17

The role of vitamin D in reproductive dysfunction in women – a systematic review Vitamin D is essential for the proper functioning of the human body. There is also evidence of its strong association with fertility problems in women. This review aims to evaluate the relationship between vitamin D and diseases affecting women’s fertility (polycystic ovarian syndrome (PCOS), uterine leiomyomas and endometriosis), and in vitro fertilization (IVF) outcome. A systematic review of the ...

Nutrição e Fertilidade – Artigo 16

The influence of ginger (Zingiber officinale) on human sperm quality and DNA fragmentation: A double-blind randomized clinical trial Background: Although the effectiveness of ginger as an antioxidant agent has been exploited, little human research has been conducted on its activity on male reproductive functions. Objective: This study was designed to investigate the effects of ginger (Zingiber officinale) on sperm DNA fragmentation (SDF) in infertile men. Materials and Methods: This ...