نتایج جستجو برای: padina sanctae cruces
تعداد نتایج: 795 فیلتر نتایج به سال:
BACKGROUND Multi-resistantmicroorganisms such as Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Candida tropicalis e Candida krusei are the main causes of microbial infections. Padina sanctae-crucis is a seaweed often used to check the contamination of ecosystems by materials such as heavy metals, but studies of the antimicrobial activity of the same seaweed were not found. ...
سابقه و هدف: جذب به عنوان یکی از موثرترین روش های تصفیه برای حذف فلزات سنگین در نظر گرفته شده است. هدف از این مطالعه بررسی کارایی جلبک قهوه ای (padina sanctae cruces) در جذب منگنز از محلول های آبی است. مواد و روش ها: آزمایشات در سیستم ناپیوسته و در دمای اتاق انجام شد و تاثیر پارامترهایی مانند محدوده زمان تماس (120-3 دقیقه)، 7 غلظت اولیه منگنز (100- 5/0 میلی گرم بر لیتر)، ph (8 ، 7 ، 5 ، 3) و 6 ...
Padina sanctae-crucis Børgesen is distributed worldwide in tropical and subtropical seas; belongs to the Dictyotaceae family, and has proven to be an exceptional source of biologically active compounds. Four compounds were isolated and identified, namely: dolastane diterpene new for the genus Padina; phaeophytin and hidroxy-phaeophytin new for the family Dictyotaceae, and; mannitol first descri...
A main goal of the neuroscience of consciousness is: find the neural correlate to conscious experiences (NCC). When have we achieved this goal? The answer depends on our operationalization of "NCC." Chalmers (2000) shaped the widely accepted operationalization according to which an NCC is a neural system with a state which is minimally sufficient (but not necessary) for an experience. A deeper ...
Two tropical macroalgae, Gracilaria salicornia and Padina sanctae-crusis, were exposed to varying concentrations of total Cu and subsequently subjected to photosynthesis-irradiance (P-I) response experiments. The study aimed to determine the effects of total Cu toxicity on the P-I model parameters and growth rate of the macroalgae. The photosynthetic efficiency (α) showed a decreasing pattern w...
Background and purpose: Adsorption is considered as one of the promising treatment methods for removal of heavy metals from aqueous solutions. The aim of this study was to determine the efficiency of Padina sanctae crucis in removal of manganese (Mn) from aqueous solutions. Materials and methods: Biosorption was studied in a series of batch experiments at room temperature and the effects of ...
A taxonomic study of the genus Padina from Japan, Southeast Asia, and Hawaii based on morphology and gene sequence data (rbcL and cox3) resulted in the recognition of four new species, that is, Padina macrophylla and Padina ishigakiensis from Ryukyu Islands, Japan; Padina maroensis from Hawaii; and Padina usoehtunii from Myanmar and Thailand. All species are bistratose and morphologically diffe...
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