zakaria.attia

Prof. Dr. Zakaria Atia Mohamed

استاذ - رئيس قسم النبات والميكروبيولوجي

كلية العلوم

العنوان: قسم النبات و الميكروبيولوجي - كلية العلوم

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  • واجبات المقررات الدراسية 4
  • المنشورات و المؤلفات 9
  • ساعات مكتبية 3
  • الاعلانات 16
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  • كل التنزيلات 5
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Potentially harmful microalgae and algal blooms in the Red Sea: Current knowledge and research needs

2018 | الكلمات المفتاحية Red Sea- harmful algal blooms- algal tox,
Potentially harmful microalgae and algal blooms in the Red Sea: Current knowledge and research needs
Harmful algal blooms (HABs) have increased throughout the world's coastal oceans during the last century mostly due to water eutrophication and climate change. These blooms are often accompanied by extreme extensive negative impacts to fisheries, coastal resources, public health and local economies. However, limited studies have reported HAB events in Red Sea coastal waters. This article reviews potentially harmful microalgae ... إقراء المزيد

Bioavailability of bound microcystins in mice orally fed with contaminated tilapia edible tissues: Implications to human health

2018 | الكلمات المفتاحية Bound microcystins- Fish tissues - Diges,
Bioavailability of bound microcystins in mice orally fed with contaminated tilapia edible tissues: Implications to human health
This study investigates for the first time in vivo potential release of bound microcystins (MCs) from edible fish tissues. Bound MCs were released in the mouse digestive system and reached the liver (2.1–14.3 ng g−1) and blood (1–5 ngml−1). The released MCs were active and negatively affected liver functions of treated mice. The estimated daily intake (EDI) for bound MCs ... إقراء المزيد

Macrophytes-cyanobacteria allelopathic interactions and their implications for water resources management—A review

2017 | الكلمات المفتاحية Allelopathy -Biocontrol -Cyanobacteria -,
Macrophytes-cyanobacteria allelopathic interactions and their implications for water resources management—A review
Macrophytes and phytoplankton including cyanobacteria are main primary producers in aquatic environments. Macrophytes can maintain water quality by suppressing phytoplankton growth through a number of mechanisms: while e.g. the absorption of high amounts of nutrients and the provision of refuge from predation for herbivorous aquatic fauna are widely accepted macrophyte functions, the role of their release of allelopathic substances in ... إقراء المزيد

Harmful cyanobacteria and their cyanotoxins in Egyptian fresh waters – state of knowledge and research needs

2016 | الكلمات المفتاحية eutrophication, harmful blooms, hepatotoxins, neurotoxins, water quality,
Harmful cyanobacteria and their cyanotoxins in Egyptian fresh waters – state of knowledge and research needs
Cyanobacterial blooms have increased in freshwater ecosystems worldwide in the last century, mostly resulting from eutrophication and climate change. These blooms represent serious threats to environmental and human health because of the production of harmful metabolites, called cyanotoxins. Like many countries, Egypt has been plagued with cyanobacterial blooms in most water sources, including the Nile River, irrigation canals, lakes and ... إقراء المزيد

Cyanobacterial Toxins in Water Sources and Their Impacts on Human Health

2016 | الكلمات المفتاحية Cyanotoxins- water- human health,
Cyanobacterial Toxins in Water Sources and Their Impacts on Human Health
Cyanobacteria are a group of phytoplankton of marine and freshwaters. The accelerated eutrophication of water sources by agricultural and industrial runoff has increased the occurrence and intensity of cyanobacterial blooms. They are of particular concern because of their production for potent hepato, neuro, and dermatoxins, being hazardous to human health. Dissemination of knowledge about cyanobacteria and their cyanotoxins assists water ... إقراء المزيد

Breakthrough of Oscillatoria limnetica and microcystin toxins into drinking water treatment plants – examples from the Nile River, Egyp

2016 | الكلمات المفتاحية conventional drinking water treatment, removal, cyanobacteria,
Breakthrough of Oscillatoria limnetica and microcystin toxins into drinking water treatment plants – examples from the Nile River, Egyp
The presence of cyanobacteria and their toxins (cyanotoxins) in processed drinking water may pose a health risk to humans and animals. The efficiency of conventional drinking water treatment processes (coagulation, flocculation, rapid sand filtration and disinfection) in removing cyanobacteria and cyanotoxins varies across different countries and depends on the composition of cyanobacteria and cyanotoxins prevailing in the water source. Most ... إقراء المزيد

Occurrence of toxic cyanobacteria and microcystin toxin in domestic water storage reservoirs, Egypt

2016 | الكلمات المفتاحية cyanobacteria, domestic reser, cyanobacteria, domestic reserv, Cyanobacteria . Drinking water . Microcy,
Occurrence of toxic cyanobacteria and microcystin toxin in domestic water storage reservoirs, Egypt
Residents in many developing countries store treated drinking water in tanks or reservoirs because of intermittent and infrequent water supplies. Many studies have focused on bacterial contamination of domestic reservoir waters, the cyanobacterial and algal contamination is largely unexplored. Therefore, the present study investigates toxic cyanobacteria and their microcystin (MC) toxins in some domestic water storage reservoirs in Egypt as ... إقراء المزيد

Occurrence of cyanobacteria and microcystin toxins in raw and treated waters of the Nile River, Egypt: implication for water treatment and human health

2015 | الكلمات المفتاحية Cyanobacteria . Drinking water . Microcy,
Occurrence of cyanobacteria and microcystin toxins in raw and treated waters of the Nile River, Egypt: implication for water treatment and human health
Abstract Monitoring of cyanobacteria and their associated toxins has intensified in raw water sources of drinking water treatment plants (WTPs) in most countries of the world. However, it is not explored yet for Egyptian WTPs. Therefore, this study was undertaken to investigate the occurrence of cyanobacteria and their microcystin (MC) toxins in the Nile River source water of Damietta WTP ... إقراء المزيد

Cyanotoxins in Egypt and Saudi Arabia

2011 | الكلمات المفتاحية Cyanotoxins- Egypt- Saudi Arabia,
Cyanotoxins in Egypt and Saudi Arabia
Cyanobacteria are photosynthetic prokaryotes that can have a wide range of habitats such as rivers, lakes, streams, ponds, marine environments, and even harsh environments, for example, hot springs. They are a natural and essential part of the ecosystem, representing the base of the aquatic food chain. However, increased eutrophication (e.g., nutrient enrichment) of these water bodies can lead to a ... إقراء المزيد

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