Papers by Waleed Abouamer
Plants
The exploitation of massive amounts of food and agro-waste represents a severe social, economic, ... more The exploitation of massive amounts of food and agro-waste represents a severe social, economic, and environmental issue. Under the growing demand for food products that are free of toxic synthetic insecticides, a methanolic extract of spent coffee grounds (SCGs), which represent the main byproduct of coffee production, was applied in the current study as a bioinsecticide against the main pests of the green bean: Spodoptera littoralis, Agrotis ipsilon, Bemisia tabaci, Empoasca fabae, and Aphis craccivora. A deterrent assay, contact bioassay, and lethal concentration analysis were performed to reveal the repellent, antifeedant, and oviposition deterrent effects. Parallel to the above-mentioned bioassays, the phytochemical composition of the methanolic SCG extract was investigated via a high-performance liquid chromatography (HPLC) analysis. Fourteen phenolic acids and five flavonoids, in addition to caffeine (alkaloid), were identified in the extract. Cinnamic, rosmarinic, and gallic...
Exploiting massive amounts of food and agro-waste represents a severe social, economic, and envir... more Exploiting massive amounts of food and agro-waste represents a severe social, economic, and environmental issue. Under the growing demand toward food products free of toxic synthetic insecticides, the methanolic extract of spent coffee grounds (SCGs), which represent the main by-product of coffee production, was applied in the current study as a bioinsecticide against the main pests of the green bean; Spodoptera littoralis, Agrotis ipsilon, Bemisia tabaci, Empoasca fabi and Aphis craccivora. Deterrent assay, contact bioassay, and lethal concentration analysis were performed to reveal the repellent, antifeedant, and oviposition deterrent effects. Parallel to the above-performed bioassays, the phytochemical composition of the SCGs methanolic extract was investigated via High-Performance Liquid Chromatography (HPLC) analysis. Fourteen phenolic acids and five flavonoids in addition to caffeine (alkaloid) have been identified in the extract. Cinnamic, rosmarinic, and gallic acids were th...
Journal of Plant Protection and Pathology, 2012
Laboratory study in cages was conducted, using different plant seeds to estimate the food prefere... more Laboratory study in cages was conducted, using different plant seeds to estimate the food preference of house sparrow, Passer domesticus niloticus Nicoll and Bonhote. Under choice and non choice test. Sparrows showed a clear difference in food preference among various seeds, while under non choice tests, sparrows preferred wheat, soybean, sorghum, safflower, sunflower and fenugreek respectively but under choice tests, sparrows preferred soybean, wheat, safflower, sunflower, sorghum and fenugreek respectively.
Journal of Plant Protection and Pathology, 2012
Propylene chlorohydrins are manufactured organic compounds containing chlorine and hydroxyl group... more Propylene chlorohydrins are manufactured organic compounds containing chlorine and hydroxyl groups. The production in the United States in 1976 was estimated to be greater than 1.78 billion pounds. These chemicals are used commercially as chemical intermediates in the manufacture of propylene oxide, a starting material for the production of polyurethane polyols and propylene glycol (US.EPA, 1977). Propylene chlorohydrins have been identified as potential pollutants for humans. On the other hand, it introduced a new form of rodenticide “ the toxicant- sterilant”. The present investigation was carried out to study the toxicity and sterilant activity of α- chlorohydrin ( Epibloc®, U- 5879 ) against adult female albino rats. Experiments were divided into three parts. The first part was concerned with determining the acute toxicity of the drug. The second part was concerned with haematological, histopathological and embryological studies of female rats treated orally with α- CH at a sing...
Abstract: Dimethoate is an organophosphorus insecticide with contact and systemic action. It was ... more Abstract: Dimethoate is an organophosphorus insecticide with contact and systemic action. It was introduced in 1956 and is produced in many countries. It is a general-use chemical for use against a broad range of insects in agriculture and also for the control of the housefly. This study was designed to evaluate and assess the possible embryo toxic potentials and neurodevelopmental impairment of Dimethoate on the intrauterine growth of mouse embryos. Fifty female mice (CD1) were given Dimethoate at sublethal doses of 9, 13, 18 and 33 mg/kg body weight /day respectively, by oral gavage, from zero day of gestation (GD0) up to 20th day of gestation (GD20). Body weights were recorded daily and at the end of the experiment mice were sacrificed, uteri were removed and dissected to evaluate the intrauterine growth retardations as well as skeletal malformation. The Student's “t”-distribution were adopted for assessment of significant changes occurring between the groups. Results reveale...
Background: Depot Medroxyprogesterone acetate (Depo-Provera ® ; DMPA) is a long term contraceptiv... more Background: Depot Medroxyprogesterone acetate (Depo-Provera ® ; DMPA) is a long term contraceptive used throughout the world. DMPA exerts its effects by blocking ovulation and inducing endometrial atrophy. Objective: This study designed to investigate the parenteral effect of DMPA on the adult female rats. Design and setting: Eighty healthy adult female rats (Sprague-Dawley) were randomly assigned into two major groups; each one divided into four minor groups injected weekly with DMPA doses (Vehicle 0; 2.7; 5.4 and 10.8 mg/kg/day) for four or six weeks, rats were observed for body weights, viability and death, at the end of experiment animals were sacrificed for further and biochemical investigation. Heart blood was drawn and sera were separated for assessment of liver function test, lipid profile, obesity and oxidative stress markers were assessed. Assessment of significant difference between the treated and control groups were carried out using SPSSv12 software. Results: DMPA dose...
Three pesticides commonly used in agriculture {glyphosate as a herbicide, mancozeb as a fungicide... more Three pesticides commonly used in agriculture {glyphosate as a herbicide, mancozeb as a fungicide and carbosulfan as an insecticide} were examined to evaluate their possible teratological effects in pregnant female rats. Groups of female Wister rats were given glyphosate, mancozeb and carbosulfan at sublethal doses of 500,500 and 10 mg/kg b.w (approximately 1/10 of their LD50 values) per day by oral gavage, respectively, from the sixth day till the twentieth day of gestation. Dams body weight were recorded daily and cesarean were performed on the twentieth day of gestation. Results showed that tested pesticides reduced dams body weight gain compared to control and caused different teratological effects such as significant irregular distribution of implantation sites, increase the resoprtion and number of dead fetuses, decrease fetal weights as well as less ossification in different parts of the fetal skeleton.
Many pesticides are known as endocrine disrupting chemicals (EDCs) which interfere with the synth... more Many pesticides are known as endocrine disrupting chemicals (EDCs) which interfere with the synthesis, storage/release, transport, binding, action, receptor recognition, post receptor activation, or elimination of natural hormones in the body that are responsible for the body functions such as the maintenance of homeostasis, growth, maturation, behavior, reproduction and embryo development. Recently, EDCs have received considerable attention because of the fear and anxiety that they have caused. Therefore, the purpose of this study is to investigate the toxicological risks of three commonly used pesticides (i.e. glyphosate as herbicide, mancozeb as fungicide and carbosulfan as an insecticide) which are suspected as endocrine disruptors. All experiments were conducted at the laboratories of Plant Protection Department, Faculty of Agriculture, Al-Azhar University, from the period of 2006 – 2009. These experiments were divided into two parts. The first part was concerned with toxicolog...
Field experiments were performed in two successive seasons (2010-2011 and 2011-2012) to evaluate ... more Field experiments were performed in two successive seasons (2010-2011 and 2011-2012) to evaluate the efficacy of six post-emergence herbicides beside hand weeding for controlling annual broad leaved weeds in wheat fields. The treatments were: Brominal W 24% EC (bromoxynil octanate), at the rate of 1.0 L fed. -1 (Feddan = 0.42 of hectare), Derby 17.5% SC (florasulam 75 + flumetsulam 100 gm L. -1 ) at 30.0 ml fed -1 , Granstar 75% DF (tribenuron-methyl) at 8.0 gm fed. -1 , Harmony M 75% (thifensulfuron methyl 68.2+metsulfuron methyl 6.8), at 24.0 gm fed. -1 , Pardner 22.5% EC (bromoxynil), at 1.0 L fed. -1 and Sinal 40% SC (metosulam) at 40.0 ml fed. -1 .
Laboratory study in cages was conducted, using different plant seeds to estimate the food prefere... more Laboratory study in cages was conducted, using different plant seeds to estimate the food preference on house sparrow, Passer domestic's niloticus Nicoll and Bonhote under choice and non choice test, Sparrows showed a clear difference in food preference among various seeds, while under non choice tests, sparrows preferred wheat, soybean, sorghum, safflower, sunflower and fenugreek respectively but under choice tests, sparrows preferred soybean, wheat, safflower, sunflower, sorghum and fenugreek respectively.
Many pesticides are known as endocrine disrupting chemicals (EDCs) which interfere with the synth... more Many pesticides are known as endocrine disrupting chemicals (EDCs) which interfere with the synthesis, storage/release, transport, binding, action, receptor recognition, post receptor activation, or elimination of natural hormones in the body that are responsible for the body functions such as the maintenance of homeostasis, growth, maturation, behavior, reproduction and embryo development.
Three pesticides commonly used in agriculture {glyphosate as a herbicide, mancozeb as a fungicide... more Three pesticides commonly used in agriculture {glyphosate as a herbicide, mancozeb as a fungicide and carbosulfan as an insecticide} were examined to evaluate their possible teratological effects in pregnant female rats. Groups of female Wister rats were given glyphosate, mancozeb and carbosulfan at sublethal doses of 500,500 and 10 mg/kg b.w (approximately 1 / 10 of their LD 50 values) per day by oral gavage, respectively, from the sixth day till the twentieth day of gestation. Dams body weight were recorded daily and cesarean were performed on the twentieth day of gestation. Results showed that tested pesticides reduced dams body weight gain compared to control and caused different teratological effects such as significant irregular distribution of implantation sites, increase the resoprtion and number of dead fetuses, decrease fetal weights as well as less ossification in different parts of the fetal skeleton.
Background: Depot Medroxyprogesterone acetate (Depo-Provera ® ; DMPA) is a long term contraceptiv... more Background: Depot Medroxyprogesterone acetate (Depo-Provera ® ; DMPA) is a long term contraceptive used throughout the world. DMPA exerts its effects by blocking ovulation and inducing endometrial atrophy. Objective: This study designed to investigate the parenteral effect of DMPA on the adult female rats. Design and setting: Eighty healthy adult female rats (Sprague-Dawley) were randomly assigned into two major groups; each one divided into four minor groups injected weekly with DMPA doses (Vehicle 0; 2.7; 5.4 and 10.8 mg/kg/day) for four or six weeks, rats were observed for body weights, viability and death, at the end of experiment animals were sacrificed for further and biochemical investigation. Heart blood was drawn and sera were separated for assessment of liver function test, lipid profile, obesity and oxidative stress markers were assessed. Assessment of significant difference between the treated and control groups were carried out using SPSSv12 software. Results: DMPA doses induced marked body weight gain elevations in liver function tests both ALT & AST and decrease in the activity of SOD, GSH-Px, NPSH and increase in production of TBARS. These alterations were statistically significant (P # 0.01) as well as dose and time dependant. Conclusion: The findings of our study shed more light on the long term effects of DMPA and support the claims that this progestational hormone derivative, while being a contraceptive, may induce harmful health alterations. Thus, special care should be exercised for women use this medication. Cardiovascular, hepatic markers as well as body weight should be evaluated periodically.
Thesis Chapters by Waleed Abouamer
Dissertation Chapters by Waleed Abouamer
Many pesticides are known as endocrine disrupting chemicals (EDCs) which interfere with the synth... more Many pesticides are known as endocrine disrupting chemicals (EDCs) which interfere with the synthesis, storage/release, transport, binding, action, receptor recognition, post receptor activation, or elimination of natural hormones in the body that are responsible for the body functions such as the maintenance of homeostasis, growth, maturation, behavior, reproduction and embryo development.
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Papers by Waleed Abouamer
Thesis Chapters by Waleed Abouamer
Dissertation Chapters by Waleed Abouamer