Endocrine disruptive effects

Part 2 book "The fish oocyte, from basic studies to biotechnological applications" includes content: Ecotoxicological effects of endocrine disrupting compounds on fish reproduction, regulatory mechanisms of oocyte maturation and ovulation, physiological and molecular basis of fish oocyte hydration, fertilization and egg activation in fishes, low-temperature preservation of fish gonad cells and oocytes,...and other contents.

252p oursky05 20-09-2023 3 2   Download

Human placental JEG-3 cells conserve a high P450 aromatase activity and are therefore suitable to evaluate how contaminants may interfere with the routes involved in estrogen synthesis during pregnancy. This has been traditionally assessed by measuring aromatase activity through the amount of tritiated water (3H2O) formed during the aromatization of 1β-3H-androst-4-ene-3,17-dione (3H-AD).

8p viginny 23-12-2022 6 3   Download

Anti-androgens entering the aquatic environment, e.g., by effluents from wastewater treatment plants or agricultural settings are contributing to endocrine disruption in wildlife and humans. Due to the simultaneous presence of agonistic compounds, common in vitro bioassays can underestimate the risk posed by androgen antagonists.

9p vironald 15-12-2022 5 2   Download

This study investigates the pesticides atrazine, chlorpyrifos, and dieldrin for endocrine disrupting, phenotypic, and neurobehavioral effects. Zebrafish embryos were exposed to various environmentally relevant concentrations of pesticides during two critical windows, 0-5 days post fertilization (dpf) throughout embryogenesis and 4- 5 dpf at early larval development.

12p thebadguys 15-01-2022 9 0   Download

Atrazine is widely used in agriculture and is a known endocrine disrupting chemical. Atrazine can seep into the water body through surface, posing a potential threat to the aquatic ecological environment and human drinking water source.

15p visilicon2711 20-08-2021 5 1   Download

Endocrine Disruptors (ED) are substances that impede the normal performance of the endocrine system. It leads to several adverse effects on health such as abnormalities of the reproductive, skeletal, immune, metabolic, neurological, cardiovascular system as well as several types of carcinomas. These could be either naturally occurring organic substances such as phytoestrogens or artificially synthesised chemicals employed in the manufacture of plastics, plasticizers, pesticides, synthetic hormones, pharma compounds etc.

13p chauchaungayxua12 29-07-2021 12 1   Download

Constructed wetland is a low cost, effective technology and it is still in the state of improvement to enhance the treatment efficiency, especially in nutrient and trace elements treatment. This study investigated the effect of aerobic and anoxic conditions in Horizontal Subsurface Flow Constructed Wetland (HSFCW) on nutrient, organic, metal and Octylphenol - OP (Endocrine disrupting chemical) treatment.

8p larachdumlanat127 02-01-2021 11 2   Download

The endocrine disrupting chemical bisphenol A (BPA) is widely used in the production of polycarbonate plastics and epoxy resins. The use of BPA-containing products in daily life makes exposure ubiquitous, and the potential human health risks of this chemical are a major public health concern.

11p vivalletta2711 11-01-2020 19 0   Download

The present study aimed at verifying the usefulness of dietary 2.5% bee-pollen (BP) or propolis (PROP) to overcome the genotoxic and endocrine disruptive effects of malathion polluted water in Oreochromis niloticus (O. niloticus). The acute toxicity test was conducted in O. niloticus in various concentrations (0–8 ppm); mortality rate was assessed daily for 96 h. The 96 h-LC50 was 5 ppm and therefore 1/5 of the median lethal concentration (1 ppm) was used for chronic toxicity assessment.

14p kethamoi1 17-11-2019 14 1   Download

A robust body of literature details reproductive effects in fish, amphibians, and reptiles related to exposure to endocrine disruptors. Evidence of these effects has also been seen in wild mammals such as polar bears and seals. Environmental exposure assessments and wildlife, laboratory and epidemiologic studies show exposure to low-level environmental contaminants, such as pesticides and other chemicals, subtly undermines the ability to reproduce.

0p yasuyidol 02-04-2013 53 2   Download

This lab uses freshwater sponges as model organisms to examine the biological effects of water pollution. Specifically, the focus of this laboratory module is on the effects that chemicals of environmental concern (e.g., endocrine disrupters) have on sponge growth and development. Contamination of aquatic ecosystems is a serious issue in environmental science. Identifying which chemicals we should be concerned with, and determining the consequences of contamination by specific compounds, is a major area of current research.

5p tainhacmienphi 19-02-2013 43 4   Download

Results from this laboratory can be used for a discussion of the biological consequences of pollution and will provide students with an appreciation for how dilution influences a chemical's biological effect. While endocrine disrupters are currently a 'hot topic,' other pollutants could also be tested. We tested some heavy metals (which are a perennial concern) and had some very interesting growth abnormalities show up. Chemical pollutants are not the only parameters that may influence sponge growth.

14p tainhacmienphi 19-02-2013 50 3   Download

This lab will introduce students to a simple bioassay that will allow them to explore the effects that a chemical's concentration has on the level of toxicity. By relying on morphological examination of sponges hatching from gemmules that are smaller than a millimeter in diameter, this module will help students develop their microscopy skills. Our major aim, however, is to have students strengthen their ability to design and test their own hypotheses.

9p tainhacmienphi 19-02-2013 26 4   Download

During the last two decades, evidence of increasing trends of several endocrine-related disorders has been strengthened. These disorders often come with lack of uniform diagnosis and/ or even unclear endocrine disruption. The later is mainly due to abnormal classical changes in the blood- released hormone to its targeted organ, abnormal communication between cells within a tissue or organ (paracrine), within the same cell (intracrine) or signals which act on the same cell (autocrine).

232p camchuong_1 10-12-2012 63 6   Download

Since the synthesis of DDT during 1874 several insecticide molecules have been identified and synthesized globally for the control of insect pests, pathogens, microbes, vectors of human and animal diseases, weeds and other obnoxious organisms. Currently, 1.8 billion kgs of pesticides are used annually worldwide in the form of herbicides, insecticides and fungicides. There are more than 1055 active ingredients registered as pesticides till date implying that there is no best alternate for the chemical pesticide.

392p maket1311 16-10-2012 77 7   Download

The detection of pharmaceutical residues remained elusive until instruments such as liquid chromatography and mass spectrometry became commonplace in environmental laboratories. The documentation of the occurrence of pharmaceutical residues and endocrine disrupting chemicals in water resources has raused questions about their long-term effects in the ecosystem and their potential effects on human health.

382p 951628473 04-05-2012 112 37   Download

Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Effects of endocrine disrupting chemicals on expression of phospholipid hydroperoxide glutathione peroxidase mRNA in rat testes

6p hoami_238 17-09-2011 45 5   Download