Journal of Scientific and Technical Research
Issue 2, 2016
Original Articles
Abstract
Bamboo is a natural vegetable fibre originated from the tropical and sub-tropical countries. In this research, alkaline-bio scoured raw bamboo fibre powder was subjected to alkaline one step pyrolysis activation by using KOH. The bamboo carbon powder was fed into a tube furnace with a ramping rate of 10°C min-1 until the temperature reached at 360°C and dwell time 15 min for N2 atmosphere. Subsequently they were cooled to room temperature. A thin film of n-Cu2O was fabricated by boiling a well cleaned Copper sheet in a 5x10-3M CuSO4 solution inside an ultrasonic bath at 60°C for 50 min. There after thin layer of colloidal CuI was deposited on the n-Cu2O layer. BAC was placed on n-Cu2O/p-CuI and ITO conductive glass plate was placed to fabricate Cu/ Cu2O/BAC/ITO solid state photovoltaic cell. BAC acts as an upper electrode; separate photo generated charge carriers and enhanced photocurrent. Mean Particle size distribution curves, Absorption spectra, Photocurrent action spectra and time development of photocurrent were used from this study.
Bamboo is a natural vegetable fibre originated from the tropical and sub-tropical countries. In this research, alkaline-bio scoured raw bamboo fibre powder was subjected to alkaline one step pyrolysis activation by using KOH. The bamboo carbon powder was fed into a tube furnace with a ramping rate of 10°C min-1 until the temperature reached at 360°C and dwell time 15 min for N2 atmosphere. Subsequently they were cooled to room temperature. A thin film of n-Cu2O was fabricated by boiling a well cleaned Copper sheet in a 5x10-3M CuSO4 solution inside an ultrasonic bath at 60°C for 50 min. There after thin layer of colloidal CuI was deposited on the n-Cu2O layer. BAC was placed on n-Cu2O/p-CuI and ITO conductive glass plate was placed to fabricate Cu/ Cu2O/BAC/ITO solid state photovoltaic cell. BAC acts as an upper electrode; separate photo generated charge carriers and enhanced photocurrent. Mean Particle size distribution curves, Absorption spectra, Photocurrent action spectra and time development of photocurrent were used from this study.
Restricted
Abstract
This paper carried out experimental study through extraction and characterization of oil extract from Rhynchophorus ferrugineus larvae. Normal hexane was used as solvent for the Soxhlet method of extraction which gives the highest percentage oil yield of 24.6% of all the other methods (Maceration method 18.2%, Cold Extraction Method 10.6%). The physicochemical analysis revealed that the tested paramaters which includes, iodine value, specific gravity, refractive index, saponification value, cholesterol value, acid value, peroxide value, free fatty acid value, viscosity etc falls within the CODEX acceptable limit of edible vegetable oil. The unsaturated nature of the oil was revealed by the fatty acid profile test using gas chromatography because of the presence of palmitoleate which is an ester of palmitoleic acid, an omega 7 mono unsaturated fatty acid and also by the iodine value (128.1892mg/g) which is a measure of the degree of unsaturation in edible oil, which falls within the range of class of oil known as semidrying oil, suggesting that the oil contains some proportion of unsaturated double bonds thereby, the oil is healthy for consumption. Elemental Analysis of the oil using Atomic Absorption Spectrophotometer indicated the presence of metals such as calcium, zinc, magnesium, manganese, iron etc in the oil. Determination of Vitamins ascertained the presence of some vitamins such as Vitamin D, B1, E, C and A
This paper carried out experimental study through extraction and characterization of oil extract from Rhynchophorus ferrugineus larvae. Normal hexane was used as solvent for the Soxhlet method of extraction which gives the highest percentage oil yield of 24.6% of all the other methods (Maceration method 18.2%, Cold Extraction Method 10.6%). The physicochemical analysis revealed that the tested paramaters which includes, iodine value, specific gravity, refractive index, saponification value, cholesterol value, acid value, peroxide value, free fatty acid value, viscosity etc falls within the CODEX acceptable limit of edible vegetable oil. The unsaturated nature of the oil was revealed by the fatty acid profile test using gas chromatography because of the presence of palmitoleate which is an ester of palmitoleic acid, an omega 7 mono unsaturated fatty acid and also by the iodine value (128.1892mg/g) which is a measure of the degree of unsaturation in edible oil, which falls within the range of class of oil known as semidrying oil, suggesting that the oil contains some proportion of unsaturated double bonds thereby, the oil is healthy for consumption. Elemental Analysis of the oil using Atomic Absorption Spectrophotometer indicated the presence of metals such as calcium, zinc, magnesium, manganese, iron etc in the oil. Determination of Vitamins ascertained the presence of some vitamins such as Vitamin D, B1, E, C and A
Restricted
Abstract
Structural analysis of medicinal compound is important for understanding of the compound and its interaction as a medicine. In the present paper, the chemical studies on Suphamethoxazole (C10H11N3O3S) carried out by Gaussian 09 software to determine total energy, molecular energies and atomic mass distributions and also calculate the bond lengths bond angles and torsional angles. And its structural analysis using X-ray technique has been done after growing it with slow evaporation using methanol as a solvent
Structural analysis of medicinal compound is important for understanding of the compound and its interaction as a medicine. In the present paper, the chemical studies on Suphamethoxazole (C10H11N3O3S) carried out by Gaussian 09 software to determine total energy, molecular energies and atomic mass distributions and also calculate the bond lengths bond angles and torsional angles. And its structural analysis using X-ray technique has been done after growing it with slow evaporation using methanol as a solvent
Restricted
Abstract
p-CuSCN was sensitized by n-Cu2O quantum dots (QDs) to fabricate a new solid state photovoltaic cell. QDs of n-Cu2O were deposited by boiling Cu/p-CuSCN photoelectrodes in a 1M CuSO4 solution to form Cu2O QDs on p-CuSCN. Boiling periods controlled the n-Cu2O quantum dot size. Activated coconut shell charcoal (CAC) was introduced on top of the Cu2O as the upper electrode and finally ITO glass was placed on CAC to fabricate the device
p-CuSCN was sensitized by n-Cu2O quantum dots (QDs) to fabricate a new solid state photovoltaic cell. QDs of n-Cu2O were deposited by boiling Cu/p-CuSCN photoelectrodes in a 1M CuSO4 solution to form Cu2O QDs on p-CuSCN. Boiling periods controlled the n-Cu2O quantum dot size. Activated coconut shell charcoal (CAC) was introduced on top of the Cu2O as the upper electrode and finally ITO glass was placed on CAC to fabricate the device
Restricted
Abstract
A simple, sensitive and precise HPTLC (high performance thin layer chromatography) method has been developed for quantitative estimation of ketamine in bulk and pharmaceutical formulations. The separation of ketamine was achieved over HPTLC glass plate of silica GF- 254 by using cyclohexane:toluene:diethylamine (5:3:2 v/v) solvent system. Densitometric evaluation was carried out in the UV region at wavelength of 254. The method was found to be accurate (98.92–100.26%) and precise (CV = 0.43–0.67 for intra-day and CV = 0.58–1.45 for inter-day) within the corresponding linear range. The limit of detection (LOD) and limit of quantification (LOQ) of sample have been found to be 100 ng/spot and 303 ng/spot, respectively
A simple, sensitive and precise HPTLC (high performance thin layer chromatography) method has been developed for quantitative estimation of ketamine in bulk and pharmaceutical formulations. The separation of ketamine was achieved over HPTLC glass plate of silica GF- 254 by using cyclohexane:toluene:diethylamine (5:3:2 v/v) solvent system. Densitometric evaluation was carried out in the UV region at wavelength of 254. The method was found to be accurate (98.92–100.26%) and precise (CV = 0.43–0.67 for intra-day and CV = 0.58–1.45 for inter-day) within the corresponding linear range. The limit of detection (LOD) and limit of quantification (LOQ) of sample have been found to be 100 ng/spot and 303 ng/spot, respectively
Restricted
Abstract
Fluorescence quenching of four naphthalenediols [1,5-; 1,7-; 2,7-; and 2,3- Naphthalenediols (NDs)] by inorganic anions [Cl−, Br−, SO4 2− SO3 2−, S2O3 2−, CO3 2−, NO3 −, and HPO4 2−] have been studied in 95% (v/v) water –ethanol mixture medium. The quenching was found to be dynamic in all systems. The plots of log kq values with singlet transition energy (Es) of the fluorophore and with ECTTS of the quencher are linear indicating the presence of electron transfer quenching mechanism. ΔGTH values for charge transfer quenching have been determined for naphthalenediols
Fluorescence quenching of four naphthalenediols [1,5-; 1,7-; 2,7-; and 2,3- Naphthalenediols (NDs)] by inorganic anions [Cl−, Br−, SO4 2− SO3 2−, S2O3 2−, CO3 2−, NO3 −, and HPO4 2−] have been studied in 95% (v/v) water –ethanol mixture medium. The quenching was found to be dynamic in all systems. The plots of log kq values with singlet transition energy (Es) of the fluorophore and with ECTTS of the quencher are linear indicating the presence of electron transfer quenching mechanism. ΔGTH values for charge transfer quenching have been determined for naphthalenediols
Restricted
Abstract
The rhizome (root) of turmeric (Curcuma longa) has long been used in traditional Asian medicine to treat various human body disorders. Laboratory and animal research have demonstrated enormous biological properties of Curcuma longa. Here we have carried out the phytochemical analysis and anticandidal examination of the ethanolic rhizome extract of this plant. Phytochemical analysis of the test extract revealed the presence of alkaloids, tannins, amino acids, cardiac glycosides and diterpenes. In GC-MS analysis, the major compound found was aromatic (ar-) tumerone (32.73%). Antifungal activity of the test extract was investigated against 10 fluconazole-resistant and 5 fluconazole-sensitive Candida strains. Minimum inhibitory concentrations (MIC90) ranged from 1000 to 2200 μg/ml for both sensitive and resistant strains. Ergosterol content was drastically reduced by the test extract (MIC90), 65% in clinical-sensitive and 71% in clinical-resistant strains. The drop in sterol content correlated well with MIC90 values. It appears that the test extract acts in a dose-dependent fashion to decrease the ergosterol content in test extract treated samples. Cellular toxicity of this extract against H9c2 rat cardiac myoblasts was less than 12% at the highest MIC value. These findings encourage further development of ethanolic rhizome extract of Curcuma longa
The rhizome (root) of turmeric (Curcuma longa) has long been used in traditional Asian medicine to treat various human body disorders. Laboratory and animal research have demonstrated enormous biological properties of Curcuma longa. Here we have carried out the phytochemical analysis and anticandidal examination of the ethanolic rhizome extract of this plant. Phytochemical analysis of the test extract revealed the presence of alkaloids, tannins, amino acids, cardiac glycosides and diterpenes. In GC-MS analysis, the major compound found was aromatic (ar-) tumerone (32.73%). Antifungal activity of the test extract was investigated against 10 fluconazole-resistant and 5 fluconazole-sensitive Candida strains. Minimum inhibitory concentrations (MIC90) ranged from 1000 to 2200 μg/ml for both sensitive and resistant strains. Ergosterol content was drastically reduced by the test extract (MIC90), 65% in clinical-sensitive and 71% in clinical-resistant strains. The drop in sterol content correlated well with MIC90 values. It appears that the test extract acts in a dose-dependent fashion to decrease the ergosterol content in test extract treated samples. Cellular toxicity of this extract against H9c2 rat cardiac myoblasts was less than 12% at the highest MIC value. These findings encourage further development of ethanolic rhizome extract of Curcuma longa
Restricted