Mohamed Gomaa - Academia.edu (original) (raw)

Papers by Mohamed Gomaa

Research paper thumbnail of Development of A Mobile Unit for The Manufacture of Non-Conventional Feed تطوير وحدة متنقلة لتصنيع الأعلاف غير التقليدية

Journal of the Advances in Agricultural Researches

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Research paper thumbnail of Relation between electric properties and water saturation for hematitic sandstone with frequency

Annals of Geophysics

Page 1. 801 ANNALS OF GEOPHYSICS, VOL. 51, N. 5/6, October/December 2008 Key words Electric prope... more Page 1. 801 ANNALS OF GEOPHYSICS, VOL. 51, N. 5/6, October/December 2008 Key words Electric properties –complex conductivity – frequency – hematite – water saturation 1. Introduction Electrical spectra of porous rocks ...

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Research paper thumbnail of Low-cost biosorption of Methylene Blue and Congo Red from single and binary systems using Sargassum latifolium biorefinery waste/wastepaper xerogel: an optimization and modeling study

Journal of Applied Phycology

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Research paper thumbnail of A Variable Fractional Order Fuzzy Logic Control Based MPPT Technique for Improving Energy Conversion Efficiency of Thermoelectric Power Generator

Energies

Thermoelectric generation technology is considered to be one of the viable methods to convert was... more Thermoelectric generation technology is considered to be one of the viable methods to convert waste heat energy directly into electricity. The utilization of this technology has been impeded due to low energy conversion efficiency. This paper aims to improve the energy conversion efficiency of the thermoelectric generator (TEG) model with a novel maximum power point tracking (MPPT) technique. A variable fractional order fuzzy logic controller (VFOFLC)-based MPPT technique is proposed in the present work in which the operating point of the TEG is moved quickly towards an optimal position to increase the energy harvesting. The fraction order term α, introduced in the MPPT algorithm, will expand or contract the input domain of the fuzzy logic controller (FLC to shorten the tracking time and maintain a steady-state output around the maximum power point (MPP). The performance of the proposed MPPT technique was verified with the TEG model by simulation using MATLAB /SIMULINK software. The...

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Research paper thumbnail of Enhancement of a Hydrogen Engine Cavitation Utilizing Mixed Fuel: a Review and Experimental Case Study

International Review of Mechanical Engineering (IREME)

Previous studies examining gasoline and hydrogen engines have typically focused on factors pertai... more Previous studies examining gasoline and hydrogen engines have typically focused on factors pertaining to air to fuel ratios, their effects on an ICE performance, combustion by-products produced during the ignition cycle and its subsequent environmental effects. Alternatively, this study examines the ways in which a hydrogen engine cavitation can be enhanced by using a graphene coated layer on the cylinder combustion chamber walls. SEM micrographs for the coated surfaces' microstructure showed a uniform distribution of the graphene layer that was free from cavities and demonstrating little to no observable defects. The study's results also showed large improvements in the BTE and exhaust temperature with respect to BMEP performance. This further resulted in significantly low levels harmful gaseous emissions, with observable reductions in the emissions of CO, NOx, and hydrocarbon derived from gasoline and pure hydrogen fuel. These results are thus indicative of a significant improvement in the performance of this particular typology of engine, in contrast to other experimentation focus found in other studies.

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Research paper thumbnail of Subtalar Arthroereisis in Treatment of Pediatric Flexible Flat Foot Using Subtalar Sinus Tarsi Implants

Indian Journal of Public Health Research & Development

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Research paper thumbnail of Environmental Impacts on the Performance of Solar Photovoltaic Systems

Sustainability

This study scrutinizes the reliability and validity of existing analyses that focus on the impact... more This study scrutinizes the reliability and validity of existing analyses that focus on the impact of various environmental factors on a photovoltaic (PV) system’s performance. For the first time, four environmental factors (the accumulation of dust, water droplets, birds’ droppings, and partial shading conditions) affecting system performance are investigated, simultaneously, in one study. The results obtained from this investigation demonstrate that the accumulation of dust, shading, and bird fouling has a significant effect on PV current and voltage, and consequently, the harvested PV energy. ‘Shading’ had the strongest influence on the efficiency of the PV modules. It was found that increasing the area of shading on a PV module surface by a quarter, half, and three quarters resulted in a power reduction of 33.7%, 45.1%, and 92.6%, respectively. However, results pertaining to the impact of water droplets on the PV panel had an inverse effect, decreasing the temperature of the PV p...

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Research paper thumbnail of Experimental Extrahepatic Cholestasis in Dogs: Ultrasonographic, Biochemical and Histopathological Study

Advances in Animal and Veterinary Sciences

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Research paper thumbnail of Evaluating the Environmental Impacts and Energy Performance of a Wind Farm System Utilizing the Life-Cycle Assessment Method: A Practical Case Study

Energies

The ever-increasing popularity of finding alternative forms of renewable energy has seen an incre... more The ever-increasing popularity of finding alternative forms of renewable energy has seen an increased interest and utilization of wind energy. The objective of this research therefore, is to evaluate the environmental impacts and energy performance of wind farms. This study was operationalized in Jordan using a life-cycle assessment (LCA) method. The environmental impact is evaluated through lifecycle emissions that include all emissions during various phases of the project. The energy performance is illustrated by the energy indicators. The latter is the energy payback ratio (EPR) and the energy payback time (EPT). This study was conducted on a 38 Vestas V112 3-MW wind turbine located in the southern region of Tafilah in Jordan that is host to the country’s first wind farm. SimaPro 7.1 software was used as the modeling platform. Data for this study were collated from various sources, including, manufacturers, the wind turbine farm, and local subcontractors. A software database was ...

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Research paper thumbnail of Theoretical and experimental performance investigation of a newly combined TDD and SWH system

Applied Thermal Engineering

This research investigates the theoretical and experimental performance of the newly combined TDD... more This research investigates the theoretical and experimental performance of the newly combined TDD/SWH (Tubular Daylight Device and Solar Water Heating) system. A novel proposed system was implemented to convert solar energy into two useful energies; light and heat simultaneously under climatic circumstances of Egypt with the same occupied space. A detailed thermodynamic model was developed to predict the performances of the TDD/SWH system. The system performance was analyzed theoretically and experimentally against time, variable temperature and incident sunlight. The experimentally recorded measurements that include the total and diffuse radiations, absorber, inlet collector, exit collector and inside water tank temperature are compared with those obtained by theoretical analysis. Additionally, three daily performances were done to study the effect of sun insolation and ambient condition on the TDD/SWH system. All measured data was recorded automatically at an interval 30 min. The TDD performance was obtained theoretically and experimentally through the internal and external illuminance. The increasing of inlet water temperature in SWH collector leads to decrease in rate of heat transfer between the collector pipe's and water. Average hourly and daily performance of SWH was calculated. Finally, the obtained results demonstrate that the proposed theoretical model matched with the experimental work.

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Research paper thumbnail of Pre versus post application of a 0.12% chlorhexidine based oral hygiene protocol in an Egyptian pediatric intensive care unit: Practice and effects

The Egyptian Journal of Critical Care Medicine

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Research paper thumbnail of A novel merging Tubular Daylight Device with Solar Water Heater – Experimental study

Renewable Energy

Tubular Daylight device (TDD) and solar water heater (SWH) are two power saving solutions that ar... more Tubular Daylight device (TDD) and solar water heater (SWH) are two power saving solutions that are commonly employed individually in residential and industrial premises. This paper proposed a novel merged power saving system consisting of TDD and SWH in one model, which is the first attempt to integrate these two systems. The idea of merging the TDD with SWH is based on utilizing the existing area around the TDD to implement the SWH around the TDD tube through a serpentine collector. The main purpose for such integration is to enhance solar energy saving, space area saving, and to decrease the fabrication cost. The illumination and thermal performance of the new proposed model were tested and analysed experimentally in different seasons in Cairo-Egypt to assess its performance in practical use. The obtained results indicated that the merged system succeeded in transferring an acceptable illumination rate and increasing the water temperature. The transferred internal illuminance has reached approximately to 6.5 W/m 2 that fulfils the required needs of lighting. Additionally, the system increased the water temperature up to 62 C, with a performance instantaneous efficiency that reached 21.17% which is very satisfactory. Furthermore, the performance of thermosyphon SWH with different serpentine collector coil number of turns has been evaluated. The results proved that, the collector number of turns has significantly affected the SWH performance in a directly proportional relation.

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Research paper thumbnail of Potential of fecal waste for the production of biomethane, bioethanol and biodiesel

Journal of Biotechnology

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Research paper thumbnail of Retrofitting strategy for building envelopes to achieve energy efficiency

Alexandria Engineering Journal

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Research paper thumbnail of Design, selective alkylation and X-ray crystal structure determination of dihydro-indolyl-1,2,4-triazole-3-thione and its 3-benzylsulfanyl analogue as potent anticancer agents

European Journal of Medicinal Chemistry, 2017

Three sets of substituted indolyl-triazoles were synthesized by the alkylation of 1,2-dihydro-5-(... more Three sets of substituted indolyl-triazoles were synthesized by the alkylation of 1,2-dihydro-5-(1H-indol-2-yl)-1,2,4-triazole-3-thione with different alkyl halides. The use of pyridine restricted the alkylation to sulfur. Whereas, upon using K2CO3, the alkylation exceeded sulfur to one of the remaining triazole nitrogens. The assignment of which nitrogen is alkylated besides sulfur is made for the first time using X-ray analysis of single crystals and 2D NMR which indicated that S-, 2-N-isomers will be preferably formed over the S-, 1-N-isomers. The antiproliferative activity on HEPG-2 and MCF-7 cancer cell lines was tested. The results showed that compound 2a is the most active with an IC50 3.58 μg/mL and 4.53 μg/mL for HEPG-2 and MCF-7 respectively and compound 7 is the least active with an IC50 > 100 μg/mL compared to the standard drug doxorubicin (IC50 4.0 μg/mL). The interaction of the synthesized compounds with tyrosine kinases, namely, Akt, PI3, and EGFR was also studied using molecular docking simulation to predict their mode of action which will drive future work directions.

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Research paper thumbnail of Metabolic engineering of cyanobacteria and microalgae for enhanced production of biofuels and high-value products

Journal of applied microbiology, Jan 13, 2016

A lot of research has been performed on cyanobacteria and microalgae with the aim to produce nume... more A lot of research has been performed on cyanobacteria and microalgae with the aim to produce numerous biotechnological products. However, native strains have a few shortcomings, like limitations in cultivation, harvesting and product extraction, which prevents reaching optimal production value at lowest costs. Such limitations require the intervention of genetic engineering to produce strains with superior properties. Promising advancements in the cultivation of cyanobacteria and microalgae have been achieved by improving photosynthetic efficiency through increasing RuBisCO activity and truncation of light-harvesting antennae. Genetic engineering has also contributed to final product extraction by inducing autolysis and product secretory systems, to enable direct product recovery without going through costly extraction steps. In this review, we summarize the different enzymes and pathways that have been targeted thus far for improving cultivation aspects, harvesting and product extr...

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Research paper thumbnail of Industrial optimization of fucoidan extraction from Sargassum sp. and its potential antioxidant and emulsifying activities

Food Hydrocolloids, 2016

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Research paper thumbnail of Morphohistological and surgical anatomy of the sinus interdigitalis in Egyptian native breeds of sheep

Beni-Suef University Journal of Basic and Applied Sciences, 2015

ABSTRACT The current study aimed to characterize the gross and microscopic structures of the inte... more ABSTRACT The current study aimed to characterize the gross and microscopic structures of the interdigital sinus in Egyptian native breeds of sheep and goats (Baladi sheep and goats) to aid in conducting farther studies on such sinus and its surgical importance. The study was carried out on the distal fore and hind limb specimens (below the fetlock joint) obtained from healthy mature ten Baladi sheep and ten Baladi goats of both sexes. For sheep, thirty specimens were subjected to gross anatomical investigation and the other ten specimens were used for histological examination. While, the forty goats fore and hind feet specimens were examined grossly. The results obtained revealed the presence of a well-developed interdigital sinus in Baladi sheep, but there was no evidence for the existence of this unique structure in all examined specimens of Baladi goats. Such sinus appeared grossly as a pipe-like, composed of two parts; body (corpus) and neck (column) which opened in the skin of the interdigital area with an external orifice. The body consisted of three distinct parts in the forefeet and a single part in the hind feet. Histologically, the wall in body and neck regions of the interdigital sinus composed of three distinct layers; epidermis, dermis and a fibrous capsule. Many sebaceous glands, hair follicles and sweat glands in addition to the glandular apocrine gland were distributed within the dermis. The secretory adenomers of the interdigital sinus arranged in different lobules and lined with cuboidal cells with bleb-like projections. It reacted positively with Periodic Acid Schiff (PAS), Sudan black and Sudan III stains, on the other hand it negatively reacted with Alcian blue stain (AB).

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Research paper thumbnail of Abstract A158: Development of CYP26 inhibitors to optimize the treatment of neuroblastoma with retinoic acid

Molecular Cancer Therapeutics, 2009

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Research paper thumbnail of Antibacterial effect of the red sea soft coral Sarcophyton trocheliophorum

Natural product research, Jan 17, 2015

The marine soft corals Sarcophyton trocheliophorum crude extracts possessed antimicrobial activit... more The marine soft corals Sarcophyton trocheliophorum crude extracts possessed antimicrobial activity towards pathogenic bacterial strains, i.e. Bacillus cereus, Salmonella typhi, Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa. Bioassay-guided fractionation indicated that the antimicrobial effect was due to the presence of terpenoid bioactive derivatives. Further biological assays of the n-hexane fractions were carried out using turbidity assay, inhibition zone assay and minimum inhibitory concentration for investigating the growth-inhibition effect towards the Gram-positive and Gram-negative bacteria. The fractions were screened and the structure of the isolated compound was justified by interpretation of the spectroscopic data, mainly mass spectrometry (GC-MS). The structure was assigned as (5S)-3-[(3E,5S)-5-hydroxy-3-hepten-6-yn-1-yl]-5-methyl-2(5H)-furanone and was effective at concentrations as low as 0.20 mg/mL. The above findings, in the course of our ongoing...

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Research paper thumbnail of Development of A Mobile Unit for The Manufacture of Non-Conventional Feed تطوير وحدة متنقلة لتصنيع الأعلاف غير التقليدية

Journal of the Advances in Agricultural Researches

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Research paper thumbnail of Relation between electric properties and water saturation for hematitic sandstone with frequency

Annals of Geophysics

Page 1. 801 ANNALS OF GEOPHYSICS, VOL. 51, N. 5/6, October/December 2008 Key words Electric prope... more Page 1. 801 ANNALS OF GEOPHYSICS, VOL. 51, N. 5/6, October/December 2008 Key words Electric properties –complex conductivity – frequency – hematite – water saturation 1. Introduction Electrical spectra of porous rocks ...

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Research paper thumbnail of Low-cost biosorption of Methylene Blue and Congo Red from single and binary systems using Sargassum latifolium biorefinery waste/wastepaper xerogel: an optimization and modeling study

Journal of Applied Phycology

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Research paper thumbnail of A Variable Fractional Order Fuzzy Logic Control Based MPPT Technique for Improving Energy Conversion Efficiency of Thermoelectric Power Generator

Energies

Thermoelectric generation technology is considered to be one of the viable methods to convert was... more Thermoelectric generation technology is considered to be one of the viable methods to convert waste heat energy directly into electricity. The utilization of this technology has been impeded due to low energy conversion efficiency. This paper aims to improve the energy conversion efficiency of the thermoelectric generator (TEG) model with a novel maximum power point tracking (MPPT) technique. A variable fractional order fuzzy logic controller (VFOFLC)-based MPPT technique is proposed in the present work in which the operating point of the TEG is moved quickly towards an optimal position to increase the energy harvesting. The fraction order term α, introduced in the MPPT algorithm, will expand or contract the input domain of the fuzzy logic controller (FLC to shorten the tracking time and maintain a steady-state output around the maximum power point (MPP). The performance of the proposed MPPT technique was verified with the TEG model by simulation using MATLAB /SIMULINK software. The...

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Research paper thumbnail of Enhancement of a Hydrogen Engine Cavitation Utilizing Mixed Fuel: a Review and Experimental Case Study

International Review of Mechanical Engineering (IREME)

Previous studies examining gasoline and hydrogen engines have typically focused on factors pertai... more Previous studies examining gasoline and hydrogen engines have typically focused on factors pertaining to air to fuel ratios, their effects on an ICE performance, combustion by-products produced during the ignition cycle and its subsequent environmental effects. Alternatively, this study examines the ways in which a hydrogen engine cavitation can be enhanced by using a graphene coated layer on the cylinder combustion chamber walls. SEM micrographs for the coated surfaces' microstructure showed a uniform distribution of the graphene layer that was free from cavities and demonstrating little to no observable defects. The study's results also showed large improvements in the BTE and exhaust temperature with respect to BMEP performance. This further resulted in significantly low levels harmful gaseous emissions, with observable reductions in the emissions of CO, NOx, and hydrocarbon derived from gasoline and pure hydrogen fuel. These results are thus indicative of a significant improvement in the performance of this particular typology of engine, in contrast to other experimentation focus found in other studies.

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Research paper thumbnail of Subtalar Arthroereisis in Treatment of Pediatric Flexible Flat Foot Using Subtalar Sinus Tarsi Implants

Indian Journal of Public Health Research & Development

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Environmental Impacts on the Performance of Solar Photovoltaic Systems

Sustainability

This study scrutinizes the reliability and validity of existing analyses that focus on the impact... more This study scrutinizes the reliability and validity of existing analyses that focus on the impact of various environmental factors on a photovoltaic (PV) system’s performance. For the first time, four environmental factors (the accumulation of dust, water droplets, birds’ droppings, and partial shading conditions) affecting system performance are investigated, simultaneously, in one study. The results obtained from this investigation demonstrate that the accumulation of dust, shading, and bird fouling has a significant effect on PV current and voltage, and consequently, the harvested PV energy. ‘Shading’ had the strongest influence on the efficiency of the PV modules. It was found that increasing the area of shading on a PV module surface by a quarter, half, and three quarters resulted in a power reduction of 33.7%, 45.1%, and 92.6%, respectively. However, results pertaining to the impact of water droplets on the PV panel had an inverse effect, decreasing the temperature of the PV p...

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Research paper thumbnail of Experimental Extrahepatic Cholestasis in Dogs: Ultrasonographic, Biochemical and Histopathological Study

Advances in Animal and Veterinary Sciences

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evaluating the Environmental Impacts and Energy Performance of a Wind Farm System Utilizing the Life-Cycle Assessment Method: A Practical Case Study

Energies

The ever-increasing popularity of finding alternative forms of renewable energy has seen an incre... more The ever-increasing popularity of finding alternative forms of renewable energy has seen an increased interest and utilization of wind energy. The objective of this research therefore, is to evaluate the environmental impacts and energy performance of wind farms. This study was operationalized in Jordan using a life-cycle assessment (LCA) method. The environmental impact is evaluated through lifecycle emissions that include all emissions during various phases of the project. The energy performance is illustrated by the energy indicators. The latter is the energy payback ratio (EPR) and the energy payback time (EPT). This study was conducted on a 38 Vestas V112 3-MW wind turbine located in the southern region of Tafilah in Jordan that is host to the country’s first wind farm. SimaPro 7.1 software was used as the modeling platform. Data for this study were collated from various sources, including, manufacturers, the wind turbine farm, and local subcontractors. A software database was ...

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Research paper thumbnail of Theoretical and experimental performance investigation of a newly combined TDD and SWH system

Applied Thermal Engineering

This research investigates the theoretical and experimental performance of the newly combined TDD... more This research investigates the theoretical and experimental performance of the newly combined TDD/SWH (Tubular Daylight Device and Solar Water Heating) system. A novel proposed system was implemented to convert solar energy into two useful energies; light and heat simultaneously under climatic circumstances of Egypt with the same occupied space. A detailed thermodynamic model was developed to predict the performances of the TDD/SWH system. The system performance was analyzed theoretically and experimentally against time, variable temperature and incident sunlight. The experimentally recorded measurements that include the total and diffuse radiations, absorber, inlet collector, exit collector and inside water tank temperature are compared with those obtained by theoretical analysis. Additionally, three daily performances were done to study the effect of sun insolation and ambient condition on the TDD/SWH system. All measured data was recorded automatically at an interval 30 min. The TDD performance was obtained theoretically and experimentally through the internal and external illuminance. The increasing of inlet water temperature in SWH collector leads to decrease in rate of heat transfer between the collector pipe's and water. Average hourly and daily performance of SWH was calculated. Finally, the obtained results demonstrate that the proposed theoretical model matched with the experimental work.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Pre versus post application of a 0.12% chlorhexidine based oral hygiene protocol in an Egyptian pediatric intensive care unit: Practice and effects

The Egyptian Journal of Critical Care Medicine

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A novel merging Tubular Daylight Device with Solar Water Heater – Experimental study

Renewable Energy

Tubular Daylight device (TDD) and solar water heater (SWH) are two power saving solutions that ar... more Tubular Daylight device (TDD) and solar water heater (SWH) are two power saving solutions that are commonly employed individually in residential and industrial premises. This paper proposed a novel merged power saving system consisting of TDD and SWH in one model, which is the first attempt to integrate these two systems. The idea of merging the TDD with SWH is based on utilizing the existing area around the TDD to implement the SWH around the TDD tube through a serpentine collector. The main purpose for such integration is to enhance solar energy saving, space area saving, and to decrease the fabrication cost. The illumination and thermal performance of the new proposed model were tested and analysed experimentally in different seasons in Cairo-Egypt to assess its performance in practical use. The obtained results indicated that the merged system succeeded in transferring an acceptable illumination rate and increasing the water temperature. The transferred internal illuminance has reached approximately to 6.5 W/m 2 that fulfils the required needs of lighting. Additionally, the system increased the water temperature up to 62 C, with a performance instantaneous efficiency that reached 21.17% which is very satisfactory. Furthermore, the performance of thermosyphon SWH with different serpentine collector coil number of turns has been evaluated. The results proved that, the collector number of turns has significantly affected the SWH performance in a directly proportional relation.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Potential of fecal waste for the production of biomethane, bioethanol and biodiesel

Journal of Biotechnology

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Research paper thumbnail of Retrofitting strategy for building envelopes to achieve energy efficiency

Alexandria Engineering Journal

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Design, selective alkylation and X-ray crystal structure determination of dihydro-indolyl-1,2,4-triazole-3-thione and its 3-benzylsulfanyl analogue as potent anticancer agents

European Journal of Medicinal Chemistry, 2017

Three sets of substituted indolyl-triazoles were synthesized by the alkylation of 1,2-dihydro-5-(... more Three sets of substituted indolyl-triazoles were synthesized by the alkylation of 1,2-dihydro-5-(1H-indol-2-yl)-1,2,4-triazole-3-thione with different alkyl halides. The use of pyridine restricted the alkylation to sulfur. Whereas, upon using K2CO3, the alkylation exceeded sulfur to one of the remaining triazole nitrogens. The assignment of which nitrogen is alkylated besides sulfur is made for the first time using X-ray analysis of single crystals and 2D NMR which indicated that S-, 2-N-isomers will be preferably formed over the S-, 1-N-isomers. The antiproliferative activity on HEPG-2 and MCF-7 cancer cell lines was tested. The results showed that compound 2a is the most active with an IC50 3.58 μg/mL and 4.53 μg/mL for HEPG-2 and MCF-7 respectively and compound 7 is the least active with an IC50 > 100 μg/mL compared to the standard drug doxorubicin (IC50 4.0 μg/mL). The interaction of the synthesized compounds with tyrosine kinases, namely, Akt, PI3, and EGFR was also studied using molecular docking simulation to predict their mode of action which will drive future work directions.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Metabolic engineering of cyanobacteria and microalgae for enhanced production of biofuels and high-value products

Journal of applied microbiology, Jan 13, 2016

A lot of research has been performed on cyanobacteria and microalgae with the aim to produce nume... more A lot of research has been performed on cyanobacteria and microalgae with the aim to produce numerous biotechnological products. However, native strains have a few shortcomings, like limitations in cultivation, harvesting and product extraction, which prevents reaching optimal production value at lowest costs. Such limitations require the intervention of genetic engineering to produce strains with superior properties. Promising advancements in the cultivation of cyanobacteria and microalgae have been achieved by improving photosynthetic efficiency through increasing RuBisCO activity and truncation of light-harvesting antennae. Genetic engineering has also contributed to final product extraction by inducing autolysis and product secretory systems, to enable direct product recovery without going through costly extraction steps. In this review, we summarize the different enzymes and pathways that have been targeted thus far for improving cultivation aspects, harvesting and product extr...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Industrial optimization of fucoidan extraction from Sargassum sp. and its potential antioxidant and emulsifying activities

Food Hydrocolloids, 2016

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Morphohistological and surgical anatomy of the sinus interdigitalis in Egyptian native breeds of sheep

Beni-Suef University Journal of Basic and Applied Sciences, 2015

ABSTRACT The current study aimed to characterize the gross and microscopic structures of the inte... more ABSTRACT The current study aimed to characterize the gross and microscopic structures of the interdigital sinus in Egyptian native breeds of sheep and goats (Baladi sheep and goats) to aid in conducting farther studies on such sinus and its surgical importance. The study was carried out on the distal fore and hind limb specimens (below the fetlock joint) obtained from healthy mature ten Baladi sheep and ten Baladi goats of both sexes. For sheep, thirty specimens were subjected to gross anatomical investigation and the other ten specimens were used for histological examination. While, the forty goats fore and hind feet specimens were examined grossly. The results obtained revealed the presence of a well-developed interdigital sinus in Baladi sheep, but there was no evidence for the existence of this unique structure in all examined specimens of Baladi goats. Such sinus appeared grossly as a pipe-like, composed of two parts; body (corpus) and neck (column) which opened in the skin of the interdigital area with an external orifice. The body consisted of three distinct parts in the forefeet and a single part in the hind feet. Histologically, the wall in body and neck regions of the interdigital sinus composed of three distinct layers; epidermis, dermis and a fibrous capsule. Many sebaceous glands, hair follicles and sweat glands in addition to the glandular apocrine gland were distributed within the dermis. The secretory adenomers of the interdigital sinus arranged in different lobules and lined with cuboidal cells with bleb-like projections. It reacted positively with Periodic Acid Schiff (PAS), Sudan black and Sudan III stains, on the other hand it negatively reacted with Alcian blue stain (AB).

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Abstract A158: Development of CYP26 inhibitors to optimize the treatment of neuroblastoma with retinoic acid

Molecular Cancer Therapeutics, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Antibacterial effect of the red sea soft coral Sarcophyton trocheliophorum

Natural product research, Jan 17, 2015

The marine soft corals Sarcophyton trocheliophorum crude extracts possessed antimicrobial activit... more The marine soft corals Sarcophyton trocheliophorum crude extracts possessed antimicrobial activity towards pathogenic bacterial strains, i.e. Bacillus cereus, Salmonella typhi, Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa. Bioassay-guided fractionation indicated that the antimicrobial effect was due to the presence of terpenoid bioactive derivatives. Further biological assays of the n-hexane fractions were carried out using turbidity assay, inhibition zone assay and minimum inhibitory concentration for investigating the growth-inhibition effect towards the Gram-positive and Gram-negative bacteria. The fractions were screened and the structure of the isolated compound was justified by interpretation of the spectroscopic data, mainly mass spectrometry (GC-MS). The structure was assigned as (5S)-3-[(3E,5S)-5-hydroxy-3-hepten-6-yn-1-yl]-5-methyl-2(5H)-furanone and was effective at concentrations as low as 0.20 mg/mL. The above findings, in the course of our ongoing...

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