نتایج جستجو برای: palythoa
تعداد نتایج: 94 فیلتر نتایج به سال:
The recent decline in the condition of coral reef communities worldwide has fueled the need to develop innovative assessment tools to document coral abundance and distribution rapidly and effectively. While most monitoring programs rely primarily on data collected in situ by trained divers, digital photographs and video are used increasingly to extract ecological indicators, provide a permanent...
As coral reef habitats decline worldwide, some reefs are transitioning from coral- to algal-dominated benthos with the exact cause for this shift remaining elusive. Increases in the abundance of microbes in the water column has been correlated with an increase in coral disease and reduction in coral cover. Here we investigated how multiple reef organisms influence microbial communities in the s...
Palytoxin (PTX), isolated from the marine soft coral Palythoa tuberculosa, increases the cation conductance of human red cell membranes. In the presence of 10(-10) M PTX and 10(-5) M DIDS, the membrane potential approximates the equilibrium potential for Na+ or K+ rather than Cl-. Even in the absence of DIDS, the Na+ and K+ conductances were greater than the Cl- conductance. The selectivity of ...
We analyzed the diversity and population structure of the 775 Vibrio isolates from different locations of the southwestern Atlantic Ocean (SAO), including St. Peter and St. Paul Archipelago (SPSPA), Abrolhos Bank (AB) and the St. Sebastian region (SS), between 2005 and 2010. In this study, 195 novel isolates, obtained from seawater and major benthic organisms (rhodoliths and corals), were compa...
با توجه به افزایش مقاومت باکتریها نسبت به آنتیبیوتیکها، نیاز به مواد جدید با خواص ضد باکتریایی بیش از بیش احساس میشود. از جمله این مواد، می توان به ترکیبات زیست فعال با خواص ضد باکتریایی استخراجشده از موجودات دریایی از قبیل مرجانها اشاره کرد. این پژوهش بهمنظور بررسی اثر ضد باکتریایی عصارههای متانولی، هیدرو اتانولی و هگزانی دو مرجان دریاییMadracis sp. و Palythoatuberclosa انجام گردید. بع...
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