Ahmed Dakrory | Cairo University (original) (raw)

Papers by Ahmed Dakrory

Vestnik Zoologii, Apr 1, 2016

Birth Defects Research, Jul 4, 2023

BackgroundSilymarin is an antioxidant without side effects even at relatively high physiological ... more BackgroundSilymarin is an antioxidant without side effects even at relatively high physiological dosage. Therefore, it is safely used as a herbal medicine for treating different diseases.Aim of workThe purpose of this study was to examine the toxicity of cadmium (Cd) in pregnant rats and their fetuses and the ameliorative effects of silymarin (SL) against this toxicity.Materials & methodsA total of 24 pregnant rats allocated into four equal groups. Control, silymarin (200 mg/kg), Cd (5 mg/kg), and a combination of Cd and silymarin concurrent from 6 to 20th gestational day. Number of corpora lutea, dams', gravid uteri, placental weights, and likewise fetal body weights and lengths were analyzed as physical parameters. Serum levels of aspartate transaminase, alanine transaminase, creatinine, urea, uric acid, and maternal and fetal liver tissues for malondialdehyde, superoxide dismutase, catalase and glutathione activity were studied. The histology of hepatic and renal tissues for both mothers and fetuses was examined. Data were statistically analyzed by analysis of variance test and Duncan's multiple range test was used to compare group means.ResultsThe findings evidenced that Cd causes teratogenic abnormalities and histopathological variation in hepatic and renal tissues of both mothers and fetuses. Cd triggers oxidative stress and disrupts liver and kidney function. In Cd + silymarin treated rats exhibited improvement in the pregnancy outcomes, reduced histopathological changes, oxidative stress as well as liver and kidney enzymes.ConclusionWe deduced that using of silymarin during gestation is effective and ameliorate the toxic maternal complications caused by cadmium.

The Egyptian Journal of Hospital Medicine, 2023

Brazilian Journal of Biology, Jan 15, 2018

The Egyptian Journal of Aquatic Research, Mar 1, 2018

Abstract The milk shark, Rhizoprionodon acutus (Ruppell, 1837), is one of the most abundant shark... more Abstract The milk shark, Rhizoprionodon acutus (Ruppell, 1837), is one of the most abundant shark species landed at Ataka fishing port at the Gulf of Suez. A total of 357 individuals (165 males and 192 females) were collected from the trawl and artisanal fisheries. Males ranged from 44.6 to 88.5 cm TL, while females ranged from 47.8 to 97.2 cm TL. The total sex ratio was estimated at 1:1.16 for males and females respectively. Lengths at 50% maturity were estimated to be 76.5 cm TL for males and 74 cm TL for females. Females possess one functional ovary and two functional uteri. The vitellogenesis and gestation occur concurrently and thus females seem to have a reproductive cycle of one year with no resting period. The mean embryo lengths in different months and the presence of neonates in virtually all months, however, indicated that parturition takes place throughout the year with a peak in summer. Length and weight at birth, depending on term embryos and neonates ranged from 39.5 to 44.6 cm TL (mean 42.05 ± 2.55). Ovarian fecundity ranged from one to nine (mean 5.56 ± 0.33). Uterine fecundity ranged from one to six embryos (mean 3.22 ± 0.24). The sex ratio of embryos was approximately 1:1.

Journal of Textile and Apparel Technology and Management, May 19, 2015

Electrospinning of carboxymethyl chitosan (CMCS) solutions in water was studied by adding poly (v... more Electrospinning of carboxymethyl chitosan (CMCS) solutions in water was studied by adding poly (vinyl alcohol) (PVA) as “guest” polymer. The properties of the CMCS/PVA solutions measured, and effects of the polymer concentration, CMCS/PVA mass ratio and processing parameters on the electrospinnability of CMCS/PVA were investigated. Morphology of the electrospun CMCS/PVA observed by using scanning electron micrographs. Results showed that the ultra-fine fibers could be generated after addition of PVA in different mass ratios of CMCS to PVA from 4–8 wt. % CMCS/PVA solutions. Antibacterial activity of electrospun fibers prepared against Gram (-ve) and Gram (+ve) bacteria is measured via Disk Diffusion Method. Electrospun CMCS/PVA nanofiberwebs show good antibacterial effects towards Gram (+ve) and Gram (-ve) bacteria. Antibacterial activities of electrospun nanofiberwebs increased by increasing the CMCS percent in the electrospun membrane. Results of the higher antibacterial activity of electrospun CMCS/PVA nanofiberwebs oriented its potential applications in wound dressings.

Amphibia-Reptilia, 2016

Skin lipids impede transcutaneous water loss in several species of squamate reptiles and act as a... more Skin lipids impede transcutaneous water loss in several species of squamate reptiles and act as a barrier to harmful microorganisms; they play an additional role as chemical cues involved in chemical communication eliciting behavioral responses in intra- and interspecific interactions. While studies till now give little detailed information on the nature of skin slough, the femoral gland secretions of the lacertid lizardAcanthodactylus boskianushave been analyzed and the chemical profile is known for the species. In the present study we use GC-MS analysis of skin slough to focus on the chemical composition of skin in the xeric-adapted lacertid lizardA. boskianusand compare this to its femoral secretions. In the shed skin we detected steroids, alcohols, carboxylic acids, alkanes, aldehydes, carboxylic acid esters, squalene, monoglycerides of fatty acids, glycerol monoethers of long chain alcohols, and 1,3 alkanediol, which are the same chemical groups already found in the femoral sec...

Copyright © 2015 Ahmed I. Dakrory et al. This is an open access article distributed under the Cre... more Copyright © 2015 Ahmed I. Dakrory et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Oxidative stress is a common mechanism contributing to the initiation and progression of hepatic damage. Hence there is a great demand for the development of agents with potent antioxidant effect. The aim of the present study is to evaluate the efficacy ofHolothuria atra extract (HaE) as an antioxidant against 7,12-dimethylbenz[a]anthracene- (DMBA-) induced hepatorenal dysfunction. Experimental animals were divided into two main groups: protective and curative. Each group was then divided into five subgroups pre- or posttreated either with distilled water (DMBA subgroups) or with HaE (200mg/kg body weight) for seven and fourteen days. Single oral administration of DMBA (15mg/kg body weight) to Wistar rats resulted in a significant ...

Egyptian Journal of Basic and Applied Sciences, 2021

Ahmed I. Dakrory In the present study, there is a well developed ciliary ganglion. In Natrix tess... more Ahmed I. Dakrory In the present study, there is a well developed ciliary ganglion. In Natrix tessellata and Coluber rogersi , this ganglion consists of two types of neurons, large ones at the periphery and smaller ones at the center. In Malpolon monspessulana, there is only one type of neurons; i.e., there is no regional differentiation. The ciliary ganglion in Natrix tessellata has two roots; radices ciliares brevis and longa, whereas in Coluber rogersi and Malpolon monspessulana, has only one root; mixed root in Coluber and radix ciliaris brevis in Malpolon. In the three species studied, there is no direct connection between the ciliary ganglion and the carotid plexus, i.e., there is no sympathetic root for the ganglion. In Natrix tessellata and Coluber rogersi, two ciliary nerves arise from the ciliary ganglion, whereas in Malpolon monspessulana, there is a single ciliary nerve.

The Journal of Basic & Applied Zoology, 2015

Australian Journal of Basic and Applied …, 2011

Journal of American Science, 2011

BioMed Research International, 2015

Oxidative stress is a common mechanism contributing to the initiation and progression of hepatic ... more Oxidative stress is a common mechanism contributing to the initiation and progression of hepatic damage. Hence there is a great demand for the development of agents with potent antioxidant effect. The aim of the present study is to evaluate the efficacy ofHolothuria atraextract (HaE) as an antioxidant against 7,12-dimethylbenz[a]anthracene- (DMBA-) induced hepatorenal dysfunction. Experimental animals were divided into two main groups: protective and curative. Each group was then divided into five subgroups pre- or posttreated either with distilled water (DMBA subgroups) or with HaE (200 mg/kg body weight) for seven and fourteen days. Single oral administration of DMBA (15 mg/kg body weight) to Wistar rats resulted in a significant increase in the serum liver enzymes and kidney function’s parameters. DMBA increased level of liver malondialdehyde (MDA), decreased levels of reduced glutathione (GSH), glutathione-S-transferase (GST), superoxide dismutase (SOD), and catalase (CAT) in th...

Abstract: The ciliary ganglion is a well-defined ovate ganglionic mass in the three species studi... more Abstract: The ciliary ganglion is a well-defined ovate ganglionic mass in the three species studied Uromastyx aegyptius, Sphenops sepsoides and Varanus griseus. The ganglion consists of bipolar neurons in the three species studied. In both Uromastyx and Sphenops the neurons are of two sizes large and small, while in Varanus they are of one and the same size. In the three species studied, the ciliary ganglion has three roots, parasympathetic (motor), sympathetic and sensory roots. The parasympathetic root is represented by the radix ciliaris brevis which arises from the ramus inferior of the nervus oculomotorius. The sympathetic root arises from the internal carotid plexus and joins the ganglion in both Sphenops and Varanus while it jnoins the ciliary nerve in Uromaxtyx. The sensory root is formed of the radix ciliaris longa which connects the ramus nasalis of the nervus trigeminus and the ciliary ganglion in Varanus and the ciliary nerve in Sphenops and both in Uromastyx. The ciliar...

The ciliary ganglion is a well-defined ovate ganglionic mass in the three species studied Uromast... more The ciliary ganglion is a well-defined ovate ganglionic mass in the three species studied Uromastyx aegyptius, Sphenops sepsoides and Varanus griseus. The ganglion consists of bipolar neurons in the three species studied. In both Uromastyx and Sphenops the neurons are of two sizes large and small, while in Varanus they are of one and the same size. In the three species studied, the ciliary ganglion has three roots, parasympathetic (motor), sympathetic and sensory roots. The parasympathetic root is represented by the radix ciliaris brevis which arises from the ramus inferior of the nervus oculomotorius. The sympathetic root arises from the internal carotid plexus and joins the ganglion in both Sphenops and Varanus while it jnoins the ciliary nerve in Uromaxtyx. The sensory root is formed of the radix ciliaris longa which connects the ramus nasalis of the nervus trigeminus and the ciliary ganglion in Varanus and the ciliary nerve in Sphenops and both in Uromastyx. The ciliary ganglion...