Objective:To investigate the antibacterial activity of henna(Lawsonia inermis Linn) obtained from different regions of Oman against a wide array of micro-organisms.Methods:fresh henna samples were obtained from differ...Objective:To investigate the antibacterial activity of henna(Lawsonia inermis Linn) obtained from different regions of Oman against a wide array of micro-organisms.Methods:fresh henna samples were obtained from different regions of Oman as leaves and seeds,100 g fresh and dry leaves and SO g of fresh and dry seeds were separately soaked in 500 mL of ethanol for three days,respectively,with frequent agitation.The mixture was filtered,and the crude extract was collected.The crude extract was then heated,at 48 ℃ in a water bath to evaporate its liquid content.The dry crude henna extract was then tested for its antibacterial activity using well-diffusion antibiotic susceptibility technique.Henna extracts were investigated for their antibacterial activity at different concentrations against a wide array of different micro-organisms including a laboratory standard bacterial strain of Pseudomonas aeruginosa(NCTC 10662)(A aeruginosa) and eleven fresh clinical isolates of P.aeruginosa obtained from patients attending the Sultan Qaboos University Hospital(SQUH).2-Hydroxy-p-Nathoqinone-Tech(2-HPNT, MW=174.16,C_(10)H_40_3) was included as control(at 50%concentration) along with the henna samples tested.Results:Henna samples demonstrated antibacterial activity against all isolates but the highest susceptibility was against P.aeruginosa with henna samples obtained from Al-sharqyia region.Conclusions:Omani henna from Al-sharqyia region demonstrates high in vitro anti-P. aeruginosa activity compared with many henna samples from different regions of Oman.展开更多
This work is a Taxonomic study based on genus Lawsonia L. in Tehama area, Albaha region—Saudi Arabia. It includes scientific description of the family Lythraceae and scientific classification of the species Lawsonia ...This work is a Taxonomic study based on genus Lawsonia L. in Tehama area, Albaha region—Saudi Arabia. It includes scientific description of the family Lythraceae and scientific classification of the species Lawsonia inermis L. The study aims to: 1) Identify Lawsonia inermis L. species in Tihama—Albaha region. 2) Determine the distribution and habits of the species Lawsonia inermis L. 3) Provide medicinal properties and local uses of Lawsonia inermis L. Botanical names and synonyms were updated. Vernacular names have been presented. Botanical description is determined depending on the vegetative of the plant. Flowers and fruits were characterized. The method was recorded due to Dr. Jacob Thomas, Herbarium Dept., College of Science, King Saud University [1]. Information about habitats and distribution was provided. The plant species has been illustrated by photos in its habitat. Chemical components, medicinal properties and local uses were included. The study revealed that Lawsonia inermis L. is widely spread throughout the study area and it has great medicinal importance, so it requires more comprehensive studies for identification. Therefore, more Biochemical studies on the effective chemical compounds are required for the medicinal importance of the plant. The results revealed that there were many medicinal properties and local uses of Lawsonia inermis L.展开更多
A new simple and sensitive kinetic spectrophotometric method has been proposed for the determination of cefadroxil in pure form and pharmaceutical formulations. The proposed method is based on the formation of yellow ...A new simple and sensitive kinetic spectrophotometric method has been proposed for the determination of cefadroxil in pure form and pharmaceutical formulations. The proposed method is based on the formation of yellow coloured product (λmax = 410 nm) that resulted after addition of the reagent, which is composed of a mixture of Henna extract, sodium hydroxide and potassium permanganate, to cefadroxil aqueous solution. The experimental conditions have been optimized. Beer’s law is obeyed over the concentrations of 100 - 35 μg/ml, with a linear regression correlation coefficient of 0.996. The proposed method has been successfully applied for the determination of cefadroxil in pharmaceutical dosage forms.展开更多
Green inhibitors are promising alternatives to toxic corrosion inhibitors as they are environmentally safe substances, ecologically acceptable and renewable. In this research, the effect of green henna as an inhibitor...Green inhibitors are promising alternatives to toxic corrosion inhibitors as they are environmentally safe substances, ecologically acceptable and renewable. In this research, the effect of green henna as an inhibitor existing in the coating of TMSM-PMMA and its electrochemical study were analyzed. The coating was produced by “sol-gel” method in order to protect the corrosion of low-carbon steel. TMSM hybrid cell was synthesized by hydrolysis and condensation, Metaacryloxypropyltrimethoxysilane and Tetraetylorthosilicate with 1:1 molar ratio and PMMA hybrid cell was produced by Methylmetaacrylate polymerization. Finally two cells were mixed in 1:1 weight ratio. The carbon steel substrates were prepared by dip coating method. SEM technique was applied for the microstructure evaluation of thin layers including different concentrations of henna extract. Adhesion of coating was analyzed by “Pull off” test. Additionally, the experimental results obtained in different concentrations of henna extract using electrochemical methods such as tafel polarization, electrochemical impedance spectroscopy indicating that coating with the concentration of 3% inhibitor had a high level of inhibition efficiency in 0.1 M HCL. The results of polarization tests signified that henna extract acts as a mixed inhibitor.展开更多
Rising global energy demand has encouraged engineers to create and design new methods to improve oil recovery from reservoirs.In this study,feasibility of using Henna extract as a natural surfactant and synthesized na...Rising global energy demand has encouraged engineers to create and design new methods to improve oil recovery from reservoirs.In this study,feasibility of using Henna extract as a natural surfactant and synthesized nanoparticles(Titanium dioxide(TiO2),Silicon dioxide(SiO2),Graphene and composite of TiO2-Graphene)for reduction of oil-water interfacial tension has been experimentally investigated.Nanoparticles were synthesized via sol-gel method and XRD,FESEM,EDAX and FTIR tests were conducted to confirm the authenticity of this synthesizing materials.Nano-surfactants were stabled with a natural water-based suspending surfactant called Tragacanth extract,which could be introduced as a practical substitute for industrial nanoparticles'stabilizers in oil industry.After CMC determination of Henna extract surfactant,the optimal concentration of Tragacanth extract surfactant,with the purpose of nano-surfactants’stabilization,was determined through particle size and zeta potential tests.Results of interfacial tension(IFT)measurements showed that the increase of Henna extract concentration from 0 wt%to 10 wt%reduced IFT between kerosene and water from 37.23 to 15.24 mN/m.Furthermore,adding 1 wt%of synthesized TiO2 nanoparticle to the Henna extract surfactant at its CMC value reduced IFT from 18.43 to 14.57 mN/m.As an impact of this significant reduction in IFT value,oil recovery factor could be improved drastically during EOR operations.Results proved that TiO2 nano-surfactant was as effective as industrial surfactants,which put human's and environment's health at risk and impose heavy economic strain on governments.展开更多
Acidizing treatment in petroleum reservoirs is a short-term and viable strategy to preserve the productivity of a well.There is a major concern for the degradation of cement sheath integrity,leading to poor zonal isol...Acidizing treatment in petroleum reservoirs is a short-term and viable strategy to preserve the productivity of a well.There is a major concern for the degradation of cement sheath integrity,leading to poor zonal isolation and environmental issues.Therefore,it is essential to understand how the cement behaves when attacked by hydrochloric acid.In this study,a cement slurry by incorporation of the Henna extract,as an environmentally friendly cement additive,was synthesized as a potential solution to solve this problem.The characteristics of the treated cement slurry were compared with a reference slurry(w/c?0.44)which is composed of only cement and water.A kinetic study was carried out to evaluate the adsorption behavior of the cement slurries exposed to an acid solution with 0.1 M HCl in a range of 25 to 55C conditions.The features of the cement slurries were evaluated by multiple analytical techniques such as XRD,FTIR,TG,and DSC analysis.From the experimental data,it is concluded that the second-order Lagergren kinetic model revealed to be the best in describing kinetic isotherms taken,because the margin between experimental and calculated values was minor for this model.The results of the characterization and HCl interaction kinetic studies underlined the prominent protective role of Henna extract-modified cement slurry in the enhancement of the cement resistance against acid attack and utilization in environmentally favorable oil well acidizing treatments.展开更多
Phenylalanine hydroxylase is assumed to be a key enzyme in drosopterin metabolism, but direct in vivo evidence to support this hypothesis is still absent.In the present study, we found a new natural reces-sive purple ...Phenylalanine hydroxylase is assumed to be a key enzyme in drosopterin metabolism, but direct in vivo evidence to support this hypothesis is still absent.In the present study, we found a new natural reces-sive purple eye mutant of Drosophila melanogaster, Hnbp, which was a 45-nt insertion mutant in the second exon of Henna.The insertion resulted in a predicted protein with 15 additional amino acids as compared to the wild-type protein.Further analysis of protein structure showed that the predicted mutant protein probably had two more β-sheets, which may cause instability of two α-helices near the catalytic centre of the enzyme in the Biopterin-Hydroxyl binding domain.Hnbp mutant showed eye color defect with decrease of mRNA level, as well as drosopterin content reduction.The drosopterin defect could be fully rescued by expression of wild type Henna in the Hnbp background by GMR-GAL4 UAS-Henna/UAS-Henna:Hnbp/Hnbp transgenic line.All taken together, it can be concluded that the mu-tation in Henna is responsible for drosopterin reduction in mutant Hnbp, which provides key in vivo evidence to support the hypothesis that Henna is involved in drosopterin synthesis.展开更多
出版于2006年9月的最新版的《国际植物命名法规》,即维也纳法规(Vienna Code),取代了圣路易斯法规(Saint Louis Code)而成为管理植物学(包括藻类学和真菌学)科学命名的唯一有效法规。本文报道了维也纳法规和圣路易斯法规之间的主要区别...出版于2006年9月的最新版的《国际植物命名法规》,即维也纳法规(Vienna Code),取代了圣路易斯法规(Saint Louis Code)而成为管理植物学(包括藻类学和真菌学)科学命名的唯一有效法规。本文报道了维也纳法规和圣路易斯法规之间的主要区别。这些区别包括两版法规在起始日期、有效发表、合格发表、化石植物、多型真菌、拼写和附录诸方面的不同。展开更多
基金Supported by Sultan Qaboos University(Grant No.IG/MED/ANAT/06/01)
文摘Objective:To investigate the antibacterial activity of henna(Lawsonia inermis Linn) obtained from different regions of Oman against a wide array of micro-organisms.Methods:fresh henna samples were obtained from different regions of Oman as leaves and seeds,100 g fresh and dry leaves and SO g of fresh and dry seeds were separately soaked in 500 mL of ethanol for three days,respectively,with frequent agitation.The mixture was filtered,and the crude extract was collected.The crude extract was then heated,at 48 ℃ in a water bath to evaporate its liquid content.The dry crude henna extract was then tested for its antibacterial activity using well-diffusion antibiotic susceptibility technique.Henna extracts were investigated for their antibacterial activity at different concentrations against a wide array of different micro-organisms including a laboratory standard bacterial strain of Pseudomonas aeruginosa(NCTC 10662)(A aeruginosa) and eleven fresh clinical isolates of P.aeruginosa obtained from patients attending the Sultan Qaboos University Hospital(SQUH).2-Hydroxy-p-Nathoqinone-Tech(2-HPNT, MW=174.16,C_(10)H_40_3) was included as control(at 50%concentration) along with the henna samples tested.Results:Henna samples demonstrated antibacterial activity against all isolates but the highest susceptibility was against P.aeruginosa with henna samples obtained from Al-sharqyia region.Conclusions:Omani henna from Al-sharqyia region demonstrates high in vitro anti-P. aeruginosa activity compared with many henna samples from different regions of Oman.
文摘This work is a Taxonomic study based on genus Lawsonia L. in Tehama area, Albaha region—Saudi Arabia. It includes scientific description of the family Lythraceae and scientific classification of the species Lawsonia inermis L. The study aims to: 1) Identify Lawsonia inermis L. species in Tihama—Albaha region. 2) Determine the distribution and habits of the species Lawsonia inermis L. 3) Provide medicinal properties and local uses of Lawsonia inermis L. Botanical names and synonyms were updated. Vernacular names have been presented. Botanical description is determined depending on the vegetative of the plant. Flowers and fruits were characterized. The method was recorded due to Dr. Jacob Thomas, Herbarium Dept., College of Science, King Saud University [1]. Information about habitats and distribution was provided. The plant species has been illustrated by photos in its habitat. Chemical components, medicinal properties and local uses were included. The study revealed that Lawsonia inermis L. is widely spread throughout the study area and it has great medicinal importance, so it requires more comprehensive studies for identification. Therefore, more Biochemical studies on the effective chemical compounds are required for the medicinal importance of the plant. The results revealed that there were many medicinal properties and local uses of Lawsonia inermis L.
文摘A new simple and sensitive kinetic spectrophotometric method has been proposed for the determination of cefadroxil in pure form and pharmaceutical formulations. The proposed method is based on the formation of yellow coloured product (λmax = 410 nm) that resulted after addition of the reagent, which is composed of a mixture of Henna extract, sodium hydroxide and potassium permanganate, to cefadroxil aqueous solution. The experimental conditions have been optimized. Beer’s law is obeyed over the concentrations of 100 - 35 μg/ml, with a linear regression correlation coefficient of 0.996. The proposed method has been successfully applied for the determination of cefadroxil in pharmaceutical dosage forms.
文摘Green inhibitors are promising alternatives to toxic corrosion inhibitors as they are environmentally safe substances, ecologically acceptable and renewable. In this research, the effect of green henna as an inhibitor existing in the coating of TMSM-PMMA and its electrochemical study were analyzed. The coating was produced by “sol-gel” method in order to protect the corrosion of low-carbon steel. TMSM hybrid cell was synthesized by hydrolysis and condensation, Metaacryloxypropyltrimethoxysilane and Tetraetylorthosilicate with 1:1 molar ratio and PMMA hybrid cell was produced by Methylmetaacrylate polymerization. Finally two cells were mixed in 1:1 weight ratio. The carbon steel substrates were prepared by dip coating method. SEM technique was applied for the microstructure evaluation of thin layers including different concentrations of henna extract. Adhesion of coating was analyzed by “Pull off” test. Additionally, the experimental results obtained in different concentrations of henna extract using electrochemical methods such as tafel polarization, electrochemical impedance spectroscopy indicating that coating with the concentration of 3% inhibitor had a high level of inhibition efficiency in 0.1 M HCL. The results of polarization tests signified that henna extract acts as a mixed inhibitor.
文摘Rising global energy demand has encouraged engineers to create and design new methods to improve oil recovery from reservoirs.In this study,feasibility of using Henna extract as a natural surfactant and synthesized nanoparticles(Titanium dioxide(TiO2),Silicon dioxide(SiO2),Graphene and composite of TiO2-Graphene)for reduction of oil-water interfacial tension has been experimentally investigated.Nanoparticles were synthesized via sol-gel method and XRD,FESEM,EDAX and FTIR tests were conducted to confirm the authenticity of this synthesizing materials.Nano-surfactants were stabled with a natural water-based suspending surfactant called Tragacanth extract,which could be introduced as a practical substitute for industrial nanoparticles'stabilizers in oil industry.After CMC determination of Henna extract surfactant,the optimal concentration of Tragacanth extract surfactant,with the purpose of nano-surfactants’stabilization,was determined through particle size and zeta potential tests.Results of interfacial tension(IFT)measurements showed that the increase of Henna extract concentration from 0 wt%to 10 wt%reduced IFT between kerosene and water from 37.23 to 15.24 mN/m.Furthermore,adding 1 wt%of synthesized TiO2 nanoparticle to the Henna extract surfactant at its CMC value reduced IFT from 18.43 to 14.57 mN/m.As an impact of this significant reduction in IFT value,oil recovery factor could be improved drastically during EOR operations.Results proved that TiO2 nano-surfactant was as effective as industrial surfactants,which put human's and environment's health at risk and impose heavy economic strain on governments.
文摘Acidizing treatment in petroleum reservoirs is a short-term and viable strategy to preserve the productivity of a well.There is a major concern for the degradation of cement sheath integrity,leading to poor zonal isolation and environmental issues.Therefore,it is essential to understand how the cement behaves when attacked by hydrochloric acid.In this study,a cement slurry by incorporation of the Henna extract,as an environmentally friendly cement additive,was synthesized as a potential solution to solve this problem.The characteristics of the treated cement slurry were compared with a reference slurry(w/c?0.44)which is composed of only cement and water.A kinetic study was carried out to evaluate the adsorption behavior of the cement slurries exposed to an acid solution with 0.1 M HCl in a range of 25 to 55C conditions.The features of the cement slurries were evaluated by multiple analytical techniques such as XRD,FTIR,TG,and DSC analysis.From the experimental data,it is concluded that the second-order Lagergren kinetic model revealed to be the best in describing kinetic isotherms taken,because the margin between experimental and calculated values was minor for this model.The results of the characterization and HCl interaction kinetic studies underlined the prominent protective role of Henna extract-modified cement slurry in the enhancement of the cement resistance against acid attack and utilization in environmentally favorable oil well acidizing treatments.
基金the State Major Basic Research Development Program (Grant No. 2006CB102100)National Natural Science Foundation of China (Grant No. 30771535)
文摘Phenylalanine hydroxylase is assumed to be a key enzyme in drosopterin metabolism, but direct in vivo evidence to support this hypothesis is still absent.In the present study, we found a new natural reces-sive purple eye mutant of Drosophila melanogaster, Hnbp, which was a 45-nt insertion mutant in the second exon of Henna.The insertion resulted in a predicted protein with 15 additional amino acids as compared to the wild-type protein.Further analysis of protein structure showed that the predicted mutant protein probably had two more β-sheets, which may cause instability of two α-helices near the catalytic centre of the enzyme in the Biopterin-Hydroxyl binding domain.Hnbp mutant showed eye color defect with decrease of mRNA level, as well as drosopterin content reduction.The drosopterin defect could be fully rescued by expression of wild type Henna in the Hnbp background by GMR-GAL4 UAS-Henna/UAS-Henna:Hnbp/Hnbp transgenic line.All taken together, it can be concluded that the mu-tation in Henna is responsible for drosopterin reduction in mutant Hnbp, which provides key in vivo evidence to support the hypothesis that Henna is involved in drosopterin synthesis.
文摘出版于2006年9月的最新版的《国际植物命名法规》,即维也纳法规(Vienna Code),取代了圣路易斯法规(Saint Louis Code)而成为管理植物学(包括藻类学和真菌学)科学命名的唯一有效法规。本文报道了维也纳法规和圣路易斯法规之间的主要区别。这些区别包括两版法规在起始日期、有效发表、合格发表、化石植物、多型真菌、拼写和附录诸方面的不同。
