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Abuelhassan S, Bakhite EA, Abdel‐Rahman AE, El‐Mahdy AFM, Saddik AA, Marae IS, Abdel‐Hafez SH, Tolba M. Synthesis, photophysical properties and biological activities of some new thienylpyridines, thienylthieno[2.3‐
b
]pyridines and related fused heterocyclic compounds. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Suzan Abuelhassan
- Department of Chemistry, Faculty of science Assiut University Assiut Egypt
| | - Etify A. Bakhite
- Department of Chemistry, Faculty of science Assiut University Assiut Egypt
| | | | - Ahmed F. M. El‐Mahdy
- Department of Chemistry, Faculty of science Assiut University Assiut Egypt
- Department of Materials and Optoelectronic Sbcience National SunYat‐Sen University Kaohsiung Taiwan
| | | | - Islam S. Marae
- Department of Chemistry, Faculty of science Assiut University Assiut Egypt
| | | | - Mahmoud Tolba
- Chemistry Department, Faculty of Science New Valley University El‐Kharja Egypt
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Tolba M, Al-Hossainy AF, Kamal Eldean AM, Younis O. From blue to green photoluminescence: Design, synthesis, and DFT calculations of heterocyclic compounds containing chromenothienopyrimidine moiety. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100801] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mahmoud Tolba
- New Valley University Chemistry Department Chemistry Department, Faculty of Science, New Valley University, El-Kharga 72511 72511 El-Kharga EGYPT
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Tolba M, Maresch M, Kamal D. Distal radial artery ligation for treatment of steal syndrome associated with radiocephalic arteriovenous fistula. J Surg Case Rep 2020; 2020:rjaa314. [PMID: 32963762 PMCID: PMC7490220 DOI: 10.1093/jscr/rjaa314] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 06/27/2020] [Accepted: 07/18/2020] [Indexed: 11/23/2022] Open
Abstract
We present a case of dialysis associated steal syndrome in a hemodialysis patient with left radiocephalic arteriovenous fistula that caused him severe rest pain. Angiography showed retrograde flow from the ulnar artery to the distal radial artery through a hypertrophied palmar arch. The problem was solved by surgical ligation of the distal radial artery leading to complete relief of patient symptoms without any notable complications.
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Affiliation(s)
- Mahmoud Tolba
- Department of Surgery, Vascular Surgery Service, Bahrain Defense Forces Hospital, Royal Medical Services, Riffa, Bahrain
| | - Martin Maresch
- Department of Surgery, Vascular Surgery Service, Bahrain Defense Forces Hospital, Royal Medical Services, Riffa, Bahrain
| | - Dhafer Kamal
- Department of Surgery, Vascular Surgery Service, Bahrain Defense Forces Hospital, Royal Medical Services, Riffa, Bahrain
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Minikh O, Tolba M, Brovko LY, Griffiths MW. Bacteriophage-based biosorbents coupled with bioluminescent ATP assay for rapid concentration and detection of Escherichia coli. J Microbiol Methods 2010; 82:177-83. [PMID: 20561957 DOI: 10.1016/j.mimet.2010.05.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Accepted: 05/23/2010] [Indexed: 10/19/2022]
Abstract
Wild type T4 bacteriophage and recombinant T4 bacteriophages displaying biotin binding peptide (BCCP) and cellulose binding module (CBM) on their heads were immobilized on nano-aluminum fiber-based filter (Disruptor), streptavidin magnetic beads and microcrystalline cellulose, respectively. Infectivity of the immobilized phages was investigated by monitoring the phage-mediated growth inhibition of bioluminescent E. coli B and cell lysis using bioluminescent ATP assay. The results showed that phage immobilization resulted in a partial loss of infectivity as compared with the free phage. Nevertheless, the use of a biosorbent based on T4 bacteriophage immobilized on Disruptor filter coupled with a bioluminescent ATP assay allowed simultaneous concentration and detection of as low as 6 x 10(3)cfu/mL of E. coli in the sample within 2h with high accuracy (CV=1-5% in log scale). Excess of interfering microflora at levels 60-fold greater than the target organism did not affect the results when bacteriophage was immobilized on the filter prior to concentration of bacterial cells.
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Affiliation(s)
- O Minikh
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, Ontario, N1G 2W1 Canada
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Tolba M, Minikh O, Brovko LY, Evoy S, Griffiths MW. Oriented immobilization of bacteriophages for biosensor applications. Appl Environ Microbiol 2010; 76:528-35. [PMID: 19948867 PMCID: PMC2805203 DOI: 10.1128/aem.02294-09] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Accepted: 11/15/2009] [Indexed: 11/20/2022] Open
Abstract
A method was developed for oriented immobilization of bacteriophage T4 through introduction of specific binding ligands into the phage head using a phage display technique. Fusion of the biotin carboxyl carrier protein gene (bccp) or the cellulose binding module gene (cbm) with the small outer capsid protein gene (soc) of T4 resulted in expression of the respective ligand on the phage head. Recombinant bacteriophages were characterized in terms of infectivity. It was shown that both recombinant phages retain their lytic activity and host range. However, phage head modification resulted in a decreased burst size and an increased latent period. The efficiency of bacteriophage immobilization with streptavidin-coated magnetic beads and cellulose-based materials was investigated. It was shown that recombinant bacteriophages form specific and strong bonds with their respective solid support and are able to specifically capture and infect the host bacterium. Thus, the use of immobilized BCCP-T4 bacteriophage for an Escherichia coli B assay using a phage multiplication approach and real-time PCR allowed detection of as few as 800 cells within 2 h.
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Affiliation(s)
- M. Tolba
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, Ontario N1G 2W1, Canada, Department of Chemical Enzymology, Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119911, Russia, Department of Electrical and Computing Engineering and National Institute for Nanotechnology, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
| | - O. Minikh
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, Ontario N1G 2W1, Canada, Department of Chemical Enzymology, Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119911, Russia, Department of Electrical and Computing Engineering and National Institute for Nanotechnology, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
| | - L. Y. Brovko
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, Ontario N1G 2W1, Canada, Department of Chemical Enzymology, Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119911, Russia, Department of Electrical and Computing Engineering and National Institute for Nanotechnology, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
| | - S. Evoy
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, Ontario N1G 2W1, Canada, Department of Chemical Enzymology, Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119911, Russia, Department of Electrical and Computing Engineering and National Institute for Nanotechnology, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
| | - M. W. Griffiths
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, Ontario N1G 2W1, Canada, Department of Chemical Enzymology, Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119911, Russia, Department of Electrical and Computing Engineering and National Institute for Nanotechnology, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
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Zhu L, Tolba M, Arola D, Salloum M, Meza F. Evaluation of effectiveness of Er,Cr:YSGG laser for root canal disinfection: theoretical simulation of temperature elevations in root dentin. J Biomech Eng 2009; 131:071004. [PMID: 19640129 DOI: 10.1115/1.3147801] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Erbium, chromium: yttrium, scandium, gallium, garnet (Er,Cr:YSGG) lasers are currently being investigated for disinfecting the root canal system. Prior to using laser therapy, it is important to understand the temperature distribution and to assess thermal damage to the surrounding tissue. In this study, a theoretical simulation using the Pennes bioheat equation is conducted to evaluate how heat spreads from the canal surface using an Er,Cr:YSGG laser. Results of the investigation show that some of the proposed treatment protocols for killing bacteria in the deep dentin are ineffective, even for long heating durations. Based on the simulation, an alternative treatment protocol is identified that has improved effectiveness and is less likely to introduce collateral damage to the surrounding tissue. The alternative protocol uses 350 mW laser power with repeating laser tip movement to achieve bacterial disinfection in the deep dentin (800 microm lateral from the canal surface), while avoiding thermal damage to the surrounding tissue (T<47 degrees C). The alternative treatment protocol has the potential to not only achieve bacterial disinfection of deep dentin but also shorten the treatment time, thereby minimizing potential patient discomfort during laser procedures.
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Affiliation(s)
- L Zhu
- Department of Mechanical Engineering, University of Maryland, Baltimore, MD 21250, USA.
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Singh A, Glass N, Tolba M, Brovko L, Griffiths M, Evoy S. Immobilization of bacteriophages on gold surfaces for the specific capture of pathogens. Biosens Bioelectron 2009; 24:3645-51. [DOI: 10.1016/j.bios.2009.05.028] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2009] [Revised: 05/03/2009] [Accepted: 05/19/2009] [Indexed: 10/20/2022]
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Abd EI-Rahim, A, Fathy EIS, Tolba M. EFFECT OF AMMONIUM NITRATE, CALCIUM NITRATE AND PLANTING SPACES ON YIELD AND YIELD COMPONENTS OF TOMATO. Journal of Plant Production 2003; 28:1391-1399. [DOI: 10.21608/jpp.2003.245930] [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]
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