Alaa Sayed | Assiut University (original) (raw)

Papers by Alaa Sayed

Research paper thumbnail of Nigella sativa seed protects against 4-nonylphenol-induced haematotoxicity in Clarias gariepinus (Burchell, 1822): Oxidant/antioxidant rebalance

4-Nonylphenol(NP)isanemergingconcerncontaminantwhichiswidelyspreadinthe aquaticecosystem.Nigella ... more 4-Nonylphenol(NP)isanemergingconcerncontaminantwhichiswidelyspreadinthe aquaticecosystem.Nigella sativaseed(NSS)hasmultifacetedtherapeuticvalues.This studyaimedtogiveinsightintothepotentialprotectiveeffectofNSSonNP-induced haematotoxicityinClarias gariepinusthroughevaluationofhaematologicalparameters, oxidant/antioxidant balance of blood lysate and histopathological investigation of bloodsmear.Onehundredandfiftyfishweredividedintofivegroups(30/group).First groupservedascontrolwhichdidnotreceivedNPexposureandfedbasaldietwith-out NSS supplementation. The other four groups were exposed to NP at a dose of 0.1mgL −1 andfeddietssupplementedwithNSSatlevelsof0,10,25and50g/kgdiet,

Research paper thumbnail of Histological and Histochemical Studies on the Early Developmental Stages of the Egyptian Toad Bufo regularis Reuss

The present study was carried out to investigate the histological and histochemical changes in th... more The present study was carried out to investigate the histological and histochemical changes in the
liver and skin on different developmental stages of Egyptian toad Bufo regularis to be used as a
histological key for such species. Our experiment started when tadpoles began to feed. The adapted
embryos are divided into 3 large tanks of 200 embryos each, collections of samples started from
feeding age every three days. Both histological and histochemical results showed that the general
architecture of the different organs was correlated with the state of development, i.e. larval, metamorphic
and post-metamorphic. They, therefore, displayed different characteristic features depending
on the investigated developmental stage starting from the larval stage (stage 44) and
ending with the post-metamorphic stage 66.

Research paper thumbnail of Molecular Characterization on the Early Developmental Stages of the Egyptian Toad Bufo regularis Reuss

Research paper thumbnail of Effect of Dietary Supplementation of Spirulina Platensis on the Growth and Haematology of the Catfish Clarias Gariepinus

Research paper thumbnail of Nuclear and cytoplasmic changes in erythrocytes of p53-deficient medaka fish (Oryzias latipes) after exposure to gamma-radiation

Research paper thumbnail of Use of hematological parameters to assess the efficiency of quince (< i> Cydonia oblonga</i> Miller) leaf extract in alleviation of the effect of ultraviolet–A radiation on African catfish< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Effects of 4-nonylphenol on blood cells of the African catfish< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Effects of ultraviolet A on the activity of two metabolic enzymes, DNA damage and lipid peroxidation during early developmental stages of the African catfish, Clarias gariepinus (Burchell, 1822)

Research paper thumbnail of Ultraviolet radiation-A (366nm) induced morphological and histological malformations during embryogenesis of< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Acute effects of Ultraviolet-A radiation on African Catfish< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Reproductive biomarkers to identify endocrine disruption in< i> Clarias gariepinus</i> exposed to 4-nonylphenol

Research paper thumbnail of Effects of 4-nonylphenol on metabolic enzymes, some ions and biochemical blood parameters of the African catfish Clarias gariepinus (Burchell, 1822)

Research paper thumbnail of Histopathological Alterations in some Body Organs of Adult Clarias gariepinus (Burchell, 1822) Exposed to 4-Nonylphenol

Research paper thumbnail of 4-Nonylphenol induced morphological and histopathological malformations in Bufo regularis tadpoles

Research paper thumbnail of The Protective Role of Quince Leaf Extract against the Adverse Impacts of Ultraviolet-A Radiation on Some Tissues of< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Genotoxicity induced by 4-Nonylphenol in adult and embryos of Clarias gariepinus

Research paper thumbnail of Effects of ultraviolet A on the activity of two metabolic enzymes, DNA damage and lipid peroxidation during early developmental stages of the African catfish, Clarias gariepinus (Burchell, 1822)

Research paper thumbnail of Ultraviolet radiation-A (366 nm) induced morphological and histological malformations during embryogenesis of Clarias gariepinus (Burchell, 1822)

Research paper thumbnail of Acute effects of Ultraviolet-A radiation on African Catfish Clarias gariepinus (Burchell, 1822

Journal of Photochemistry and Photobiology B-biology, 2007

Research paper thumbnail of Ultraviolet radiation-A (366 nm) induced morphological and histological malformations during embryogenesis of Clarias gariepinus (Burchell, 1822

Journal of Photochemistry and Photobiology B-biology, 2009

Research paper thumbnail of Nigella sativa seed protects against 4-nonylphenol-induced haematotoxicity in Clarias gariepinus (Burchell, 1822): Oxidant/antioxidant rebalance

4-Nonylphenol(NP)isanemergingconcerncontaminantwhichiswidelyspreadinthe aquaticecosystem.Nigella ... more 4-Nonylphenol(NP)isanemergingconcerncontaminantwhichiswidelyspreadinthe aquaticecosystem.Nigella sativaseed(NSS)hasmultifacetedtherapeuticvalues.This studyaimedtogiveinsightintothepotentialprotectiveeffectofNSSonNP-induced haematotoxicityinClarias gariepinusthroughevaluationofhaematologicalparameters, oxidant/antioxidant balance of blood lysate and histopathological investigation of bloodsmear.Onehundredandfiftyfishweredividedintofivegroups(30/group).First groupservedascontrolwhichdidnotreceivedNPexposureandfedbasaldietwith-out NSS supplementation. The other four groups were exposed to NP at a dose of 0.1mgL −1 andfeddietssupplementedwithNSSatlevelsof0,10,25and50g/kgdiet,

Research paper thumbnail of Histological and Histochemical Studies on the Early Developmental Stages of the Egyptian Toad Bufo regularis Reuss

The present study was carried out to investigate the histological and histochemical changes in th... more The present study was carried out to investigate the histological and histochemical changes in the
liver and skin on different developmental stages of Egyptian toad Bufo regularis to be used as a
histological key for such species. Our experiment started when tadpoles began to feed. The adapted
embryos are divided into 3 large tanks of 200 embryos each, collections of samples started from
feeding age every three days. Both histological and histochemical results showed that the general
architecture of the different organs was correlated with the state of development, i.e. larval, metamorphic
and post-metamorphic. They, therefore, displayed different characteristic features depending
on the investigated developmental stage starting from the larval stage (stage 44) and
ending with the post-metamorphic stage 66.

Research paper thumbnail of Molecular Characterization on the Early Developmental Stages of the Egyptian Toad Bufo regularis Reuss

Research paper thumbnail of Effect of Dietary Supplementation of Spirulina Platensis on the Growth and Haematology of the Catfish Clarias Gariepinus

Research paper thumbnail of Nuclear and cytoplasmic changes in erythrocytes of p53-deficient medaka fish (Oryzias latipes) after exposure to gamma-radiation

Research paper thumbnail of Use of hematological parameters to assess the efficiency of quince (< i> Cydonia oblonga</i> Miller) leaf extract in alleviation of the effect of ultraviolet–A radiation on African catfish< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Effects of 4-nonylphenol on blood cells of the African catfish< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Effects of ultraviolet A on the activity of two metabolic enzymes, DNA damage and lipid peroxidation during early developmental stages of the African catfish, Clarias gariepinus (Burchell, 1822)

Research paper thumbnail of Ultraviolet radiation-A (366nm) induced morphological and histological malformations during embryogenesis of< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Acute effects of Ultraviolet-A radiation on African Catfish< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Reproductive biomarkers to identify endocrine disruption in< i> Clarias gariepinus</i> exposed to 4-nonylphenol

Research paper thumbnail of Effects of 4-nonylphenol on metabolic enzymes, some ions and biochemical blood parameters of the African catfish Clarias gariepinus (Burchell, 1822)

Research paper thumbnail of Histopathological Alterations in some Body Organs of Adult Clarias gariepinus (Burchell, 1822) Exposed to 4-Nonylphenol

Research paper thumbnail of 4-Nonylphenol induced morphological and histopathological malformations in Bufo regularis tadpoles

Research paper thumbnail of The Protective Role of Quince Leaf Extract against the Adverse Impacts of Ultraviolet-A Radiation on Some Tissues of< i> Clarias gariepinus</i>(Burchell, 1822)

Research paper thumbnail of Genotoxicity induced by 4-Nonylphenol in adult and embryos of Clarias gariepinus

Research paper thumbnail of Effects of ultraviolet A on the activity of two metabolic enzymes, DNA damage and lipid peroxidation during early developmental stages of the African catfish, Clarias gariepinus (Burchell, 1822)

Research paper thumbnail of Ultraviolet radiation-A (366 nm) induced morphological and histological malformations during embryogenesis of Clarias gariepinus (Burchell, 1822)

Research paper thumbnail of Acute effects of Ultraviolet-A radiation on African Catfish Clarias gariepinus (Burchell, 1822

Journal of Photochemistry and Photobiology B-biology, 2007

Research paper thumbnail of Ultraviolet radiation-A (366 nm) induced morphological and histological malformations during embryogenesis of Clarias gariepinus (Burchell, 1822

Journal of Photochemistry and Photobiology B-biology, 2009