1
|
Abd El-Tawab, A, Abdel-Salam M, Ahmed M, Hashim T. Improving Salt-Affected Soils for Enhanced Fodder Beet Productivity: Effects of Soil Conditioners and Tillage Techniques. Journal of Soil Sciences and Agricultural Engineering 2023; 0:143-150. [DOI: 10.21608/jssae.2023.202488.1156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
2
|
Abdel-Hady E, Mohamed F, Ahmed M, Abdel-Salam M, Ayobe M. Supplementation of Lipoic Acid, Zinc and Clopidogrel Reduces Mortality Rate and Incidence of Ventricular Arrhythmia in Experimental Myocardial Infarction. Front Physiol 2021; 12:582223. [PMID: 33815129 PMCID: PMC8009994 DOI: 10.3389/fphys.2021.582223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 02/26/2021] [Indexed: 11/21/2022] Open
Abstract
Despite the significant advances in management of coronary heart diseases, myocardial infarction (MI) is still associated with a high mortality rate. The present study was planned to investigate the possible protective effects of the anti-oxidants lipoic acid and zinc sulfate as well as the anti-platelet clopidogrel on cardiac dysfunction in experimental isoproterenol (ISO)-induced MI, aiming at achieving useful means for protection and therapy against MI. Wistar rats of both sexes were allocated into five groups: control, untreated MI and MI pre-treated with lipoic acid, zinc, or clopidogrel. All rats were subjected to ECG recording and measurement of plasma levels of troponin I, creatine kinase-MB (CK-MB) unit, triglycerides and total cholesterol. The hearts were isolated and studied on Langendorff preparation for assessment of intrinsic cardiac activities. The results revealed that the percent mortality was markedly reduced upon pre-treatment and the total arrhythmia was also decreased except for the zinc pre-treated rats. The ST-segment elevation was significantly reduced and the plasma levels of CK-MB were only decreased in lipoic acid and clopidogrel pre-treated rats with variable hypolipidemic effect. Hearts of clopidogrel pre-treated rats showed augmented inotropic activity both basal and in response to β-adrenergic stimulation. While zinc pre-treated hearts revealed improved rate of contraction and increased myocardial flow rate. Overall, these results indicate that lipoic acid, zinc and clopidogrel were variably effective in modifying the ISO-induced MI insults and offered partial protection against experimental myocardial damage.
Collapse
Affiliation(s)
- Enas Abdel-Hady
- Department of Physiology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Fatma Mohamed
- Department of Physiology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mona Ahmed
- Department of Physiology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mohamed Abdel-Salam
- Department of Physiology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mahmoud Ayobe
- Department of Physiology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| |
Collapse
|
3
|
Abdel-Salam M, Omran B, Whitehead K, Baek KH. Superior Properties and Biomedical Applications of Microorganism-Derived Fluorescent Quantum Dots. Molecules 2020; 25:E4486. [PMID: 33007905 PMCID: PMC7582318 DOI: 10.3390/molecules25194486] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/29/2020] [Accepted: 09/29/2020] [Indexed: 11/16/2022] Open
Abstract
Quantum dots (QDs) are fluorescent nanocrystals with superb photo-physical properties. Applications of QDs have been exponentially increased during the past decade. They can be employed in several disciplines, including biological, optical, biomedical, engineering, and energy applications. This review highlights the structural composition and distinctive features of QDs, such as resistance to photo-bleaching, wide range of excitations, and size-dependent light emission features. Physical and chemical preparation of QDs have prominent downsides, including high costs, regeneration of hazardous byproducts, and use of external noxious chemicals for capping and stabilization purposes. To eliminate the demerits of these methods, an emphasis on the latest progress of microbial synthesis of QDs by bacteria, yeast, and fungi is introduced. Some of the biomedical applications of QDs are overviewed as well, such as tumor and microRNA detection, drug delivery, photodynamic therapy, and microbial labeling. Challenges facing the microbial fabrication of QDs are discussed with the future prospects to fully maximize the yield of QDs by elucidating the key enzymes intermediating the nucleation and growth of QDs. Exploration of the distribution and mode of action of QDs is required to promote their biomedical applications.
Collapse
Affiliation(s)
- Mohamed Abdel-Salam
- Analysis and Evaluation Department, Nanotechnology Research Center, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo PO 11727, Egypt;
| | - Basma Omran
- Department of Biotechnology, Yeungnam University, Gyeongbuk, Gyeongsan 38541, Korea;
- Department of Processes Design & Development, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo PO 11727, Egypt
| | - Kathryn Whitehead
- Microbiology at Interfaces, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK;
| | - Kwang-Hyun Baek
- Department of Biotechnology, Yeungnam University, Gyeongbuk, Gyeongsan 38541, Korea;
| |
Collapse
|
4
|
Mohamed F, Elwan M, Abd El-Hamed K, Abdel-Salam M, El-Deeb AA. Strawberry Plug Transplant Production in Trays: The Influence of Genotype, Initial Ramet Size and Substrate. Catrina: The International Journal of Environmental Sciences 2019; 18:71-80. [DOI: 10.21608/cat.2019.28607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
|
5
|
Abdelaziz AA, Seto T, Abdel-Salam M, Otani Y. Influence of nitrogen excited species on the destruction of naphthalene in nitrogen and air using surface dielectric barrier discharge. J Hazard Mater 2013; 246-247:26-33. [PMID: 23280051 DOI: 10.1016/j.jhazmat.2012.12.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2012] [Revised: 11/28/2012] [Accepted: 12/01/2012] [Indexed: 06/01/2023]
Abstract
The destruction of naphthalene, as representative polycyclic aromatic hydrocarbons, by surface dielectric barrier discharge is investigated in air as well as dry and humidified nitrogen at ambient temperature. Naphthalene destruction efficiency is evaluated in terms of chemical change vis-a-vis energy utilization. The detected byproducts are qualitatively evaluated in order to understand the role of the active species in the destruction process. The results show that the destruction efficiency and the energy efficiency are higher in the dry nitrogen than in the humidified nitrogen, and these decrease with the increase of the humidity. Measured concentration of ozone as a byproduct qualitatively indicates the roles of oxygen and ozone in the destruction process in air. The analysis of the aerosol particles formed during the destruction process, both in the dry and humidified nitrogen, confirmed the adverse effects of the humidity on the byproducts formation and subsequently on the destruction process.
Collapse
Affiliation(s)
- Ayman A Abdelaziz
- Department of Chemical and Material Engineering, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | | | | | | |
Collapse
|
6
|
Feteih R, Abdel-Salam M, Jamjoom H, Akbar H. Salivary anti-Helicobacter pylori positivity among endoscopy patients with chronic liver disease. East Mediterr Health J 2009; 15:1371-1378. [PMID: 20218127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this study, endoscopy patients with and without chronic liver disease (CLD) were examined and tested for Helicobacter pylori infection by detecting the presence of serum and salivary anti-H. pylori antibody. The validity of these measures was compared with Campylobacter-like organism analysis (gold standard) performed on patients requiring gastric biopsy. Among 114 patients with CLD and 50 without, the commonest endoscopy diagnosis was gastritis (27.2%). Salivary H. pylori positivity was significantly associated with older age. Salivary anti-H. pylori antibody positivity showed low sensitivity (36.6%) and high specificity (75.8%) in CLD patients.
Collapse
Affiliation(s)
- R Feteih
- Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | | | | | | |
Collapse
|
7
|
Abdel-Salam M, Wiitanen D, Abd-Elsalam M. Magnetic fields in a Faraday-rotator underneath a high-voltage transmission-line conductor. Proceedings of the Twenty-Second Annual North American Power Symposium 2002. [DOI: 10.1109/naps.1990.151376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
|
8
|
Abstract
This paper is aimed at determining the distribution of the fields, induced charges, and currents on a human body standing in the high electric fields produced by high voltage overhead transmission lines. This method of analysis is based on the charge simulation technique. This will serve to explain the biological studies of possible long-term exposure effects to electric fields.
Collapse
Affiliation(s)
- M Abdel-Salam
- Electrical Engineering Department, Assiut University, Egypt
| | | |
Collapse
|
9
|
Abd-Elsalam M, Abdel-Salam M, Wiitanen D, Perger W. A new laser voltmeter. Meas Sci Technol 1993; 4:311-320. [DOI: 10.1088/0957-0233/4/3/009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
|
10
|
Abdel-Salam M, Weiss P, Lieske B. Discharges in air from point electrodes in the presence of dielectric plates-experimental results. ACTA ACUST UNITED AC 1992. [DOI: 10.1109/14.135602] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
11
|
Abdel-Salam M, Mayall BH, Chew K, Silverman S, Greenspan JS. Which oral white lesions will become malignant? An image cytometric study. Oral Surg Oral Med Oral Pathol 1990; 69:345-50. [PMID: 2314859 DOI: 10.1016/0030-4220(90)90297-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We investigated the value of image cytometry in predicting the prognosis of oral epithelial lesions, whether or not they show dysplasia. Thirty-five oral epithelial lesions were studied retrospectively. Of these, 23 had later transformed to carcinoma and 12 had not. By means of the Leitz TAS image analyzer, 200 nuclei of epithelial cells and 20 nuclei of lymphocytes from each section were individually assessed for eight features related to shape and amount of stain and for six features related to chromatin pattern. The mean, standard deviation, and interquartile range of each feature were calculated, first for each section and then for each group. With the use of linear stepwise discriminant analysis we constructed a predictive model, which consisted of three variables related to chromatin pattern. The variables were mean margination, standard deviation of clumping, and standard deviation of condensation. In the jackknife classification, this model predicted the malignant potential of the lesions that later transformed to cancer with 86% predictive value and 83% sensitivity.
Collapse
Affiliation(s)
- M Abdel-Salam
- Oral Pathology Department, Alexandria University, Egypt
| | | | | | | | | |
Collapse
|
12
|
Abstract
The value of image analysis in predicting the malignant potential of oral epithelial lesions showing either hyperplasia or dysplasia was investigated; 5-micron formalin-fixed sections of 16 oral epithelial lesions, of which eight had later transformed to carcinoma and eight had not transformed during a follow-up of 10-15 years were studied. The sections were stained with the azure A-Feulgen reaction for nuclear DNA. In each section 200 nuclei of epithelial cells and 20 nuclei of lymphocytes were assessed; all measurements were made blindly. For each nucleus six features related to shape and amount of stain and six features related to chromatin pattern were assessed. For each feature the mean, SD, and interquartile range were determined and used for linear stepwise discriminant analysis. A model of three variables with the most discriminating power was developed. When the jackknifed classification test was applied using this model, the malignant potential of the lesions that later transformed could be predicted with 87.5% accuracy.
Collapse
Affiliation(s)
- M Abdel-Salam
- Department of Stomatology, University of California, San Francisco 94143-0512
| | | | | | | | | |
Collapse
|
13
|
Abstract
We investigated the value of image analysis in discriminating among oral white lesions with hyperplasia without dysplasia and oral white or white-and-red lesions with moderate or severe dysplasia. Normal oral epithelial tissue was used as a control. Image analysis was applied to 5-micron formalin-fixed sections stained with the azure A-Feulgen reaction for nuclear DNA. For 150-200 cells from each section, 5 nuclear variables were assessed: area, form factor, total stain, average stain and ellipticity. For each variable, 2 measurements were obtained, the mean and the interquartile range, and were used for stepwise discriminant analysis. Using this test, a model of 3 measurements with the most discriminating power was developed. When the jackknife classification test was applied to this model, we could discriminate with 81% accuracy between the 4 groups of tissue studied.
Collapse
Affiliation(s)
- M Abdel-Salam
- Department of Stomatology, University of California, San Francisco 94143-0512
| | | | | | | | | |
Collapse
|
14
|
Shillitoe EJ, Hoover CI, Fisher SJ, Abdel-Salam M, Greenspan JS. Characterization of oral streptococci that activate the dietary glycoside rutin to a mutagen. J Natl Cancer Inst 1984; 73:673-8. [PMID: 6381853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Oral streptococci are described that hydrolyze the dietary glycoside rutin (CAS: 153-18-4), resulting in mutagenic activity. Bacteria that hydrolyze rutin were isolated from the mouth of each of 10 healthy volunteers. The activity was inducible, and the product was mutagenic in the Salmonella mutagenicity assay. These bacteria were present in the greatest proportion on the dorsum of the tongue where they formed 1.5% of the total cultivable microflora. The appearance of the colonies, cell morphology, and biochemical characteristics were those of Streptococcus milleri. However, rutin hydrolysis did not occur with any of 30 isolates of this species from blood of patients with bacteremia, with any of 4 stock strains, or with any of 14 strains of streptococci from the other 4 major oral species. Therefore, activation of rutin to a mutagen is not a universal function of the normal oral flora, but it can be accomplished by some strains of S. milleri.
Collapse
|
15
|
|
16
|
Korany MA, Abdel-Salam N, Abdel-Salam M. Colorimetric Determination of Thymol and Eugenol in Volatile Oils. J AOAC Int 1978. [DOI: 10.1093/jaoac/61.1.169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
A colorimetric method for determining thymol and eugenol in volatile oils is presented. Thymol and eugenol are reacted with sodium cobaltinitrite in aqueous acetic acid. The yellow color produced is measured at 330 and 370 nm in chloroform, and at 396 and 450 nm in sodium hydroxide solution for thymol and eugenol, respectively. The method is applied to the assay of thyme oil (thymol type) and clove oil. The results obtained are reasonably reproducible with a coefficient of variation less than 2%.
Collapse
Affiliation(s)
- Mohamed A Korany
- University of Alexandria, Faculty of Pharmacy, Alexandria, Egypt
| | | | | |
Collapse
|