adel kamal El-Dean | Assiut University (original) (raw)
Papers by adel kamal El-Dean
MOLECULAR REARRANGEMENT OF SULPHUR COMPOUNDS (PART I). PYROLYSIS OF SOME SUBSTITUTED RHODANINE
Thermal rearrangement of 3-phenylrhodanine (I) and 5-benzylidene-3-phenylrhodanine (IV) in air ha... more Thermal rearrangement of 3-phenylrhodanine (I) and 5-benzylidene-3-phenylrhodanine (IV) in air has been thoroughly investigated. Homolytic cleavage of (C-S) and (C-N) bonds occurred, followed by a series of hydrogen abstractions, coupling, and cyclization reactions. The isolated
products of compound (I) are CS2 CO, H2S, NH3, aniline, dibenzylamine, tribenzylamine, thioglycolic acid, phenyl isothiocyanate, bibenzyl. stilbene, p-arninoacetophenone, thiocarbanilide,
2-thioxoindole and 2,3,4,5-tetraphenylthiophene.I n case of compound (IV),t he isolated products are CS2 H2S. H2O, CO, phenyl isothiocyanate, benzothiophene, 2-phenylquinoline, aniline, thiocarbanilide,
2-phenylindole, cinnamic acid and polystyrene. A suitable mechanism has been suggested to
account for the obtained products.
SYNTHESIS OF TRICYCLIC COMPOUNDS WITH THIOPYRIDONE RINGS, 1989
Reaction of 3,4-trimethylene-6-amino-S-ethoxycarbonylthiopyrane-2-thione (1) with hydrazine hydra... more Reaction of 3,4-trimethylene-6-amino-S-ethoxycarbonylthiopyrane-2-thione (1) with hydrazine hydrate gave the corresponding o-diaminocyclopentapyridine-2-thione (2). Ring closure of 2 with some reagents, namely, formic acid, aromatic aldehydes, carbon disulphide. phenacyl bromide, ethyl chloroformate, ethyl chloroacetate, nitrosylsulfuric acid, and pyruvic acid gave tricyclic compounds (2-14) by direct or indirect pathways, respectively.
SYNTHESIS AND REACTIONS OF SOME ISOQUINOLINE DERIVATIVES, 1989
Treatment of 3,4-tetramethylene-6-amino-5-cyano-thiopyran-2(1H)thione (1) with alkali followed by... more Treatment of 3,4-tetramethylene-6-amino-5-cyano-thiopyran-2(1H)thione (1) with alkali followed by acidification with HCI afforded 1,2,5,6,7,8-hexahydro-4-cyano-3(2H)-oxoisoquinoline-l-thiol (2). When compound (1) was reacted with excess alkyl halides the corresponding 0and S-alkylated isoquinolines (3) were obtained. Also, cu-chloroacetic acid and p-bromopropionic acid reacted with compound (2) to produce thiazolo and thiazinoisoquinoiines (4) and (5). Furthermore, the reaction of (2) with one mole of phenacylbromide produced-S-phenacyl derivatives (6), which cyclized to give the corresponding thiazoloisoquinoline (7). However two moles of phenacyl bromides gave the corresponding Sand 0-phenacyl derivatives (8). The later compounds were cyclized to give furoisoquinoline derivative (9).
Phosphorus, Sulfur, and Silicon and the Related Elements, 1996
... ABD EL-AAL. M. GABER,$,$ AHMED. A. ATALLAT and ... (1981). (1988). 10. AA Atalla, S. A. Mahgo... more ... ABD EL-AAL. M. GABER,$,$ AHMED. A. ATALLAT and ... (1981). (1988). 10. AA Atalla, S. A. Mahgoub, AM Gaber and MM Aly, Bull. Fac. Sci., Assiut Univ., 19, 67 11. S. A. Mahgoub, A. M. Fahmy, MM Aly and M. Z. A. Badr, Bull. Chem SOC. Jpn., 59, 1605 12. ...
![Research paper thumbnail of Novel Syntheses of 5-Aminothieno[2,3-c]pyridazine, Pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazine, Pyridazino[4′,3′:4,5]thieno[3,2-d][1,2,3]triazine and Phthalazine Derivatives](https://attachments.academia-assets.com/97175415/thumbnails/1.jpg)
](ChemInform, 2003
Condensation of 4-cyano-5,6-dimethyl-3-pyridazinone 1 with aromatic aldehydes gave the novel styr... more Condensation of 4-cyano-5,6-dimethyl-3-pyridazinone 1 with aromatic aldehydes gave the novel styryl derivatives 2a-c. Refluxing of compound 2a with phosphorus oxychloride furnished 3-chloropyridazine derivative 3. Compound 3 was reacted with thiourea and produced pyridazine-3(2H)thione 4. Thieno[2,3-c]pyridazines 5a-e were achieved by cycloalkylation of compound 4 with halocompounds in methanol under reflux and in the presence of sodium methoxide. Also, refluxing of compound 4 with N-substituted chloroacetamide in the presence of potassium carbonate afforded thienopyridazines 6a-e. Cyclization of compound 6 with some electrophilic reagents as carbon disulfide and triethyl orthoformate furnished the novel pyrimido[4',5':4,5]thieno[2,3-c]pyridazines 12 and 13a-c, respectively. Diazotisation of compound 6 with sodium nitrite in acetic acid produced the pyridazino[4',3':4,5]thieno[3,2-d][1,2,3]triazines 14a-c. Ternary condensation of compound 1, aromatic aldehydes and malononitrile in ethanol containing piperidine under reflux afforded the novel phthalazines 16a-c. Compound 3 was subjected to some nucleophilic substitution reactions with amines and sodium azide and formed the aminopyridazines 17a, b and tetrazolo[1,5-b]pyridazine 19, respectively. The structures of the synthesized compounds were established by elemental and spectral analyses.
Journal of the Chinese Chemical Society, 2004
Abd El-Aal M. Gaber,a Mohamed SA El-Gaby,b* Adel M. Kamal El-Dean,a Hassan A. Eyadac and Ahmed SN... more Abd El-Aal M. Gaber,a Mohamed SA El-Gaby,b* Adel M. Kamal El-Dean,a Hassan A. Eyadac and Ahmed SN Al-Kamalia aDepartment of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt bDepartment of Chemistry, Faculty of Science, Al-Azhar University at ...
Egyptian Sugar Journal, Jun 1, 2019
The adsorption behavior of mordant yellow 12 (4-amino phenyl azo salicylic sodium salt) (MY12) fr... more The adsorption behavior of mordant yellow 12 (4-amino phenyl azo salicylic sodium salt) (MY12) from aqueous solutions using low cost adsorbent citric acid or tartaric acid treated Sugarcane bagasse (SCB) was carried out. The experimental results have been investigated according to Langmuir and Freundlich isotherms. The effect of initial concentration of the dye, biosorbent dosage, temperature, contact time and pH were involved in the experiments. It was reported that the maximum removal percentage of MY12 was 95.2 % at pH 2.8 and contact time 40 minutes. The removal percentage decreases, as the concentration of the dye increases. Similar trend was found with the pH factor. The maximum biosorption capacities qe of MY12 by SCB was 8.2 mg g-1. It was concluded that; bagasse can be used as an efficient adsorbent material for the removal of organic dyes from aqueous solutions.
Egyptian Sugar Journal, 2018
This research aims to remove the solid sediments that completely blocked the central distribution... more This research aims to remove the solid sediments that completely blocked the central distribution pipe in the juice clarifiers. These sediments can't be removed by traditional methods such as crushing or heating, due to the special condition of the pipe inside the clarifier, its narrow diameter and vertical position. Therefore, chemical methods were used to solve this problem. A new technique was used in this process through a mixture of sodium hydroxide and hydrogen peroxide solution. There are many experiments and attempts to find the most suitable way of addition and also the final required concentrations of 1:1 dilution for both solutions and the diluted sodium hydroxide solution (48%) was added firstly and after 24 hours a solution of hydrogen peroxide was added with twice the amount of sodium hydroxide. This work was based on the fact that the decomposition of hydrogen peroxide in the alkaline medium is accompanied by the release of oxygen, the occurrence of effervescence ...
Egyptian Sugar Journal, 2020
Glycosylation of small molecules based heterocycles can improve the biological importance of the ... more Glycosylation of small molecules based heterocycles can improve the biological importance of the parent scaffold. In the current study, various new substituted pyridine and substituted pyrimidine thioglycosides were synthesized via the reaction of substituted pyridine and pyrimidine thiols with 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide in presence of sodium acetate and ethanol .The chemical structures of the synthesized compounds were confirmed by elemental and spectral techniques including FT-IR, 1 H NMR In addition to 13 C NMR and mass spectroscopy for some of them. Alternatively, some of the synthesized compounds revealed significant antibacterial and antifungal activates. Also, most of these compounds exhibited highly promising anti-inflammatory activities compared with indomethacin.
Egyptian Sugar Journal
Antibiotic pollution in the aquatic environment has emerged as one of the most serious concerns c... more Antibiotic pollution in the aquatic environment has emerged as one of the most serious concerns caused by the use of pharmaceuticals and personal care products (PPCPs). Antibiotic levels in wastewater from pharmaceutical factories and hospitals have been detected at varying levels. An effective method for the removal of ceftriaxone (a β-lactam antibiotic) in aqueous systems has been developed. The method uses Fe(III) to complex ceftriaxone and removes it from the solution. Ultraviolet (UV) and Fourier Transform Infra-Red (FTIR) detection techniques were used to identify the ceftriaxone-Fe(III) complex, while high-performance liquid chromatography (HPLC), was used to quantify the amount of ceftriaxone removed. Results showed that 99.7 % of ceftriaxone was removed in 3 h by Fe (III) ions in a 1:1 concentration ratio at pH 3.3 and at room temperature. The study demonstrated that reaction time, and concentration ratio of the reactants are critical parameters for effective complexation. The complexation reaction technique has the potential to be used in a treatment process for the removal of ceftriaxone chemically from industrial wastewater. However, a neutralization step is required to process the waste aqueous phase.
Egyptian Sugar Journal, 2020
Hexavalent chromium is a priority toxic and carcinogenic chemical when present in excess. It is v... more Hexavalent chromium is a priority toxic and carcinogenic chemical when present in excess. It is very much required to remove it from effluents before allowing it to enter any water system or on to land. In the present study, the removal of Cr(VI) by adsorptionfrom wastewater using low cost adsorbent modified sugarcane bagasse by tartaric acid (SCB) was studied. The effect of the initial concentration of Cr(VI), bio sorbent dosage, temperature, contact time, and pH were studied. It was noted that the removal decreased with the increase in the initial concentration of Cr(VI) ions and also pH. The adsorption of Cr(VI) from water was favorable at low pH values. The kinetic of the Cr(VI) adsorption on SCB was found to follow pseudo second order mechanism. The adsorption data can be satisfactorily explained by Freundlich isotherm. This work proved that treated bagasse can be used as an efficient adsorbent material for removal of Cr(VI) from wastewater.
Egyptian Sugar Journal, 2019
Oligosaccharides (OS) are considered as functional food and prebiotics. They employed in food, fe... more Oligosaccharides (OS) are considered as functional food and prebiotics. They employed in food, feed, pharmaceutical and agricultural applications as well as used as cosmetics and immunestimulating agents. Oligosaccharides may be isolated from natural sources or chemically synthesized, but the prices are high. An alternative approach to oligosaccharide synthesis is to use microbial production. The high cost of OS production is the major restriction in the industrial production. So, this study was aimed to produce OS by Leuconostoc holzaapfeliistrain S7 using sugar cane molasses as low cost fermentation medium. The yields of OS by this bacterial strain reached to 21.55, 28.82, 37.35, 44.23and 30.93gl-1 when used sugar cane molasses at concentrations of 130, 160, 200, 262 and 290 gl-1 , respectively, comparing with 64.80 gl-1 OS formed by the same strain grown on modified sodium gluconate medium at 7 pH fortified by 80 gl-1 sucrose and 5gl-1 of a mixture of equal weight of each of yeast extract, peptone & beef extract, incubated at 25°C for 72 hours. Chemical characterization of the obtained OS was achieved using Fourier Transform-Infra-Red spectroscopy (FT-IR) and Liquid Chromatography-Mass Spectrometric (LC-MS).Also, their melting point and monosaccharaides content in extracted product were determined. It could be concluded that sugar cane molasses used in
Egyptian Sugar Journal, 2020
Egyptian Sugar Journal, 2019
Egyptian Sugar Journal, 2020
Sugarcane bagasse was collected from different sources(from local juice centre, Egyptian Sugar & ... more Sugarcane bagasse was collected from different sources(from local juice centre, Egyptian Sugar & Integrated Industries Company, The residue of the sugar production and by scratching of sugarcane). The waxes were extracted using different solvents (water, ethanol, n-hexane, toluene and methylene chloride). The waxes obtained from each solvent containing different components. The extracted waxes were crystallized and then carrying out different analyses for each fraction of them (FT-IR, H NMR and GC-MS spectra), depending on the analyses we determined the wax components.
Current Chemistry Letters
Pyrimidine compounds continue to attract great interest in the field of organic synthesis due to ... more Pyrimidine compounds continue to attract great interest in the field of organic synthesis due to their various chemical and biological applications observed, especially in recent times. As a result, this review covering some periods from 1957 to 2021 has been prepared to discuss some of the structural pathways of these compounds as well as some of their interactions and applications.
Current Chemistry Letters
In examining for unique insecticidal agents, two derivatives namely, 2-((3-cyano-4,6-distyrylpyri... more In examining for unique insecticidal agents, two derivatives namely, 2-((3-cyano-4,6-distyrylpyridin-2-yl)thio)-N-(4-nitrophenyl)acetamide (2) and 3-amino-N-(4-nitrophenyl)-4,6-distyrylthieno[2,3-b]pyridine-2-carboxamide (3) were synthesized from distyrylpyridine-2-thione (1). The new compounds were structurally clarified by spectral and elemental analysis data. The insecticidal activity of these compounds were carried out against cowpea aphid, Aphis craccivora Koch. It is demonstrated that the compounds 2 and 3 have noteworthy insecticidal activity against nymphs of cowpea aphid with LC50 values of 0.025-0.027 ppm and 0.005-0.006 ppm after 24 h and 48 h of treatment, respectively. Also, the compounds 2 and 3 have noteworthy insecticidal activity against adults of cowpea aphid with LC50 values of 0.112-0.129 ppm and 0.014-0.015 ppm after 24 h and 48 h of treatment, respectively, that were comparable to that of the control acetamiprid.
MOLECULAR REARRANGEMENT OF SULPHUR COMPOUNDS (PART I). PYROLYSIS OF SOME SUBSTITUTED RHODANINE
Thermal rearrangement of 3-phenylrhodanine (I) and 5-benzylidene-3-phenylrhodanine (IV) in air ha... more Thermal rearrangement of 3-phenylrhodanine (I) and 5-benzylidene-3-phenylrhodanine (IV) in air has been thoroughly investigated. Homolytic cleavage of (C-S) and (C-N) bonds occurred, followed by a series of hydrogen abstractions, coupling, and cyclization reactions. The isolated
products of compound (I) are CS2 CO, H2S, NH3, aniline, dibenzylamine, tribenzylamine, thioglycolic acid, phenyl isothiocyanate, bibenzyl. stilbene, p-arninoacetophenone, thiocarbanilide,
2-thioxoindole and 2,3,4,5-tetraphenylthiophene.I n case of compound (IV),t he isolated products are CS2 H2S. H2O, CO, phenyl isothiocyanate, benzothiophene, 2-phenylquinoline, aniline, thiocarbanilide,
2-phenylindole, cinnamic acid and polystyrene. A suitable mechanism has been suggested to
account for the obtained products.
SYNTHESIS OF TRICYCLIC COMPOUNDS WITH THIOPYRIDONE RINGS, 1989
Reaction of 3,4-trimethylene-6-amino-S-ethoxycarbonylthiopyrane-2-thione (1) with hydrazine hydra... more Reaction of 3,4-trimethylene-6-amino-S-ethoxycarbonylthiopyrane-2-thione (1) with hydrazine hydrate gave the corresponding o-diaminocyclopentapyridine-2-thione (2). Ring closure of 2 with some reagents, namely, formic acid, aromatic aldehydes, carbon disulphide. phenacyl bromide, ethyl chloroformate, ethyl chloroacetate, nitrosylsulfuric acid, and pyruvic acid gave tricyclic compounds (2-14) by direct or indirect pathways, respectively.
SYNTHESIS AND REACTIONS OF SOME ISOQUINOLINE DERIVATIVES, 1989
Treatment of 3,4-tetramethylene-6-amino-5-cyano-thiopyran-2(1H)thione (1) with alkali followed by... more Treatment of 3,4-tetramethylene-6-amino-5-cyano-thiopyran-2(1H)thione (1) with alkali followed by acidification with HCI afforded 1,2,5,6,7,8-hexahydro-4-cyano-3(2H)-oxoisoquinoline-l-thiol (2). When compound (1) was reacted with excess alkyl halides the corresponding 0and S-alkylated isoquinolines (3) were obtained. Also, cu-chloroacetic acid and p-bromopropionic acid reacted with compound (2) to produce thiazolo and thiazinoisoquinoiines (4) and (5). Furthermore, the reaction of (2) with one mole of phenacylbromide produced-S-phenacyl derivatives (6), which cyclized to give the corresponding thiazoloisoquinoline (7). However two moles of phenacyl bromides gave the corresponding Sand 0-phenacyl derivatives (8). The later compounds were cyclized to give furoisoquinoline derivative (9).
Phosphorus, Sulfur, and Silicon and the Related Elements, 1996
... ABD EL-AAL. M. GABER,$,$ AHMED. A. ATALLAT and ... (1981). (1988). 10. AA Atalla, S. A. Mahgo... more ... ABD EL-AAL. M. GABER,$,$ AHMED. A. ATALLAT and ... (1981). (1988). 10. AA Atalla, S. A. Mahgoub, AM Gaber and MM Aly, Bull. Fac. Sci., Assiut Univ., 19, 67 11. S. A. Mahgoub, A. M. Fahmy, MM Aly and M. Z. A. Badr, Bull. Chem SOC. Jpn., 59, 1605 12. ...
ChemInform, 2003
Condensation of 4-cyano-5,6-dimethyl-3-pyridazinone 1 with aromatic aldehydes gave the novel styr... more Condensation of 4-cyano-5,6-dimethyl-3-pyridazinone 1 with aromatic aldehydes gave the novel styryl derivatives 2a-c. Refluxing of compound 2a with phosphorus oxychloride furnished 3-chloropyridazine derivative 3. Compound 3 was reacted with thiourea and produced pyridazine-3(2H)thione 4. Thieno[2,3-c]pyridazines 5a-e were achieved by cycloalkylation of compound 4 with halocompounds in methanol under reflux and in the presence of sodium methoxide. Also, refluxing of compound 4 with N-substituted chloroacetamide in the presence of potassium carbonate afforded thienopyridazines 6a-e. Cyclization of compound 6 with some electrophilic reagents as carbon disulfide and triethyl orthoformate furnished the novel pyrimido[4',5':4,5]thieno[2,3-c]pyridazines 12 and 13a-c, respectively. Diazotisation of compound 6 with sodium nitrite in acetic acid produced the pyridazino[4',3':4,5]thieno[3,2-d][1,2,3]triazines 14a-c. Ternary condensation of compound 1, aromatic aldehydes and malononitrile in ethanol containing piperidine under reflux afforded the novel phthalazines 16a-c. Compound 3 was subjected to some nucleophilic substitution reactions with amines and sodium azide and formed the aminopyridazines 17a, b and tetrazolo[1,5-b]pyridazine 19, respectively. The structures of the synthesized compounds were established by elemental and spectral analyses.
Journal of the Chinese Chemical Society, 2004
Abd El-Aal M. Gaber,a Mohamed SA El-Gaby,b* Adel M. Kamal El-Dean,a Hassan A. Eyadac and Ahmed SN... more Abd El-Aal M. Gaber,a Mohamed SA El-Gaby,b* Adel M. Kamal El-Dean,a Hassan A. Eyadac and Ahmed SN Al-Kamalia aDepartment of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt bDepartment of Chemistry, Faculty of Science, Al-Azhar University at ...
Egyptian Sugar Journal, Jun 1, 2019
The adsorption behavior of mordant yellow 12 (4-amino phenyl azo salicylic sodium salt) (MY12) fr... more The adsorption behavior of mordant yellow 12 (4-amino phenyl azo salicylic sodium salt) (MY12) from aqueous solutions using low cost adsorbent citric acid or tartaric acid treated Sugarcane bagasse (SCB) was carried out. The experimental results have been investigated according to Langmuir and Freundlich isotherms. The effect of initial concentration of the dye, biosorbent dosage, temperature, contact time and pH were involved in the experiments. It was reported that the maximum removal percentage of MY12 was 95.2 % at pH 2.8 and contact time 40 minutes. The removal percentage decreases, as the concentration of the dye increases. Similar trend was found with the pH factor. The maximum biosorption capacities qe of MY12 by SCB was 8.2 mg g-1. It was concluded that; bagasse can be used as an efficient adsorbent material for the removal of organic dyes from aqueous solutions.
Egyptian Sugar Journal, 2018
This research aims to remove the solid sediments that completely blocked the central distribution... more This research aims to remove the solid sediments that completely blocked the central distribution pipe in the juice clarifiers. These sediments can't be removed by traditional methods such as crushing or heating, due to the special condition of the pipe inside the clarifier, its narrow diameter and vertical position. Therefore, chemical methods were used to solve this problem. A new technique was used in this process through a mixture of sodium hydroxide and hydrogen peroxide solution. There are many experiments and attempts to find the most suitable way of addition and also the final required concentrations of 1:1 dilution for both solutions and the diluted sodium hydroxide solution (48%) was added firstly and after 24 hours a solution of hydrogen peroxide was added with twice the amount of sodium hydroxide. This work was based on the fact that the decomposition of hydrogen peroxide in the alkaline medium is accompanied by the release of oxygen, the occurrence of effervescence ...
Egyptian Sugar Journal, 2020
Glycosylation of small molecules based heterocycles can improve the biological importance of the ... more Glycosylation of small molecules based heterocycles can improve the biological importance of the parent scaffold. In the current study, various new substituted pyridine and substituted pyrimidine thioglycosides were synthesized via the reaction of substituted pyridine and pyrimidine thiols with 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide in presence of sodium acetate and ethanol .The chemical structures of the synthesized compounds were confirmed by elemental and spectral techniques including FT-IR, 1 H NMR In addition to 13 C NMR and mass spectroscopy for some of them. Alternatively, some of the synthesized compounds revealed significant antibacterial and antifungal activates. Also, most of these compounds exhibited highly promising anti-inflammatory activities compared with indomethacin.
Egyptian Sugar Journal
Antibiotic pollution in the aquatic environment has emerged as one of the most serious concerns c... more Antibiotic pollution in the aquatic environment has emerged as one of the most serious concerns caused by the use of pharmaceuticals and personal care products (PPCPs). Antibiotic levels in wastewater from pharmaceutical factories and hospitals have been detected at varying levels. An effective method for the removal of ceftriaxone (a β-lactam antibiotic) in aqueous systems has been developed. The method uses Fe(III) to complex ceftriaxone and removes it from the solution. Ultraviolet (UV) and Fourier Transform Infra-Red (FTIR) detection techniques were used to identify the ceftriaxone-Fe(III) complex, while high-performance liquid chromatography (HPLC), was used to quantify the amount of ceftriaxone removed. Results showed that 99.7 % of ceftriaxone was removed in 3 h by Fe (III) ions in a 1:1 concentration ratio at pH 3.3 and at room temperature. The study demonstrated that reaction time, and concentration ratio of the reactants are critical parameters for effective complexation. The complexation reaction technique has the potential to be used in a treatment process for the removal of ceftriaxone chemically from industrial wastewater. However, a neutralization step is required to process the waste aqueous phase.
Egyptian Sugar Journal, 2020
Hexavalent chromium is a priority toxic and carcinogenic chemical when present in excess. It is v... more Hexavalent chromium is a priority toxic and carcinogenic chemical when present in excess. It is very much required to remove it from effluents before allowing it to enter any water system or on to land. In the present study, the removal of Cr(VI) by adsorptionfrom wastewater using low cost adsorbent modified sugarcane bagasse by tartaric acid (SCB) was studied. The effect of the initial concentration of Cr(VI), bio sorbent dosage, temperature, contact time, and pH were studied. It was noted that the removal decreased with the increase in the initial concentration of Cr(VI) ions and also pH. The adsorption of Cr(VI) from water was favorable at low pH values. The kinetic of the Cr(VI) adsorption on SCB was found to follow pseudo second order mechanism. The adsorption data can be satisfactorily explained by Freundlich isotherm. This work proved that treated bagasse can be used as an efficient adsorbent material for removal of Cr(VI) from wastewater.
Egyptian Sugar Journal, 2019
Oligosaccharides (OS) are considered as functional food and prebiotics. They employed in food, fe... more Oligosaccharides (OS) are considered as functional food and prebiotics. They employed in food, feed, pharmaceutical and agricultural applications as well as used as cosmetics and immunestimulating agents. Oligosaccharides may be isolated from natural sources or chemically synthesized, but the prices are high. An alternative approach to oligosaccharide synthesis is to use microbial production. The high cost of OS production is the major restriction in the industrial production. So, this study was aimed to produce OS by Leuconostoc holzaapfeliistrain S7 using sugar cane molasses as low cost fermentation medium. The yields of OS by this bacterial strain reached to 21.55, 28.82, 37.35, 44.23and 30.93gl-1 when used sugar cane molasses at concentrations of 130, 160, 200, 262 and 290 gl-1 , respectively, comparing with 64.80 gl-1 OS formed by the same strain grown on modified sodium gluconate medium at 7 pH fortified by 80 gl-1 sucrose and 5gl-1 of a mixture of equal weight of each of yeast extract, peptone & beef extract, incubated at 25°C for 72 hours. Chemical characterization of the obtained OS was achieved using Fourier Transform-Infra-Red spectroscopy (FT-IR) and Liquid Chromatography-Mass Spectrometric (LC-MS).Also, their melting point and monosaccharaides content in extracted product were determined. It could be concluded that sugar cane molasses used in
Egyptian Sugar Journal, 2020
Egyptian Sugar Journal, 2019
Egyptian Sugar Journal, 2020
Sugarcane bagasse was collected from different sources(from local juice centre, Egyptian Sugar & ... more Sugarcane bagasse was collected from different sources(from local juice centre, Egyptian Sugar & Integrated Industries Company, The residue of the sugar production and by scratching of sugarcane). The waxes were extracted using different solvents (water, ethanol, n-hexane, toluene and methylene chloride). The waxes obtained from each solvent containing different components. The extracted waxes were crystallized and then carrying out different analyses for each fraction of them (FT-IR, H NMR and GC-MS spectra), depending on the analyses we determined the wax components.
Current Chemistry Letters
Pyrimidine compounds continue to attract great interest in the field of organic synthesis due to ... more Pyrimidine compounds continue to attract great interest in the field of organic synthesis due to their various chemical and biological applications observed, especially in recent times. As a result, this review covering some periods from 1957 to 2021 has been prepared to discuss some of the structural pathways of these compounds as well as some of their interactions and applications.
Current Chemistry Letters
In examining for unique insecticidal agents, two derivatives namely, 2-((3-cyano-4,6-distyrylpyri... more In examining for unique insecticidal agents, two derivatives namely, 2-((3-cyano-4,6-distyrylpyridin-2-yl)thio)-N-(4-nitrophenyl)acetamide (2) and 3-amino-N-(4-nitrophenyl)-4,6-distyrylthieno[2,3-b]pyridine-2-carboxamide (3) were synthesized from distyrylpyridine-2-thione (1). The new compounds were structurally clarified by spectral and elemental analysis data. The insecticidal activity of these compounds were carried out against cowpea aphid, Aphis craccivora Koch. It is demonstrated that the compounds 2 and 3 have noteworthy insecticidal activity against nymphs of cowpea aphid with LC50 values of 0.025-0.027 ppm and 0.005-0.006 ppm after 24 h and 48 h of treatment, respectively. Also, the compounds 2 and 3 have noteworthy insecticidal activity against adults of cowpea aphid with LC50 values of 0.112-0.129 ppm and 0.014-0.015 ppm after 24 h and 48 h of treatment, respectively, that were comparable to that of the control acetamiprid.