Asian Journal of Chemistry (ASIAN J CHEM )


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Publications in this journal

  • [show abstract] [hide abstract]
    ABSTRACT: We investigated the free amino acids content in different plant parts of golden root (Scutellaria baicalensis) and identified 21 different free amino acids, the levels of which varied widely between organs. The amount of free amino acids in the flower was much higher than that in the leaf (3.4-fold), stem (1.9-fold) and root (5.3-fold). Most of the free amino acids were present in higher amounts in the flower; in particular, a markedly higher amount of glutamine was observed in the flower, which contained 27, 11 and 2 times more glutamine than the root, leaf and stem. Norvaline was found only in the root, which also contained much higher amounts of leucine (37-, 28- and 9-fold higher than in the leaf, stem and flower). Our findings demonstrate that S. baicalensis contains varying amounts of free amino acids between plant tissues and the levels were the highest in the flower.
    Asian Journal of Chemistry 04/2014; 26(10):1910-1912.
  • Asian Journal of Chemistry 03/2014; 26(6):1829-1832.
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    ABSTRACT: Linear programming as versatile optimization tool could successfully be applied to engineer the properties of oil in order to improve the quality aspects respecting the multiple linear constraints variables. Spreadsheets based software with the solver function may successfully be used to solve the purpose. The possibility to obtain the desired ratio of saturated, mono unsaturated and poly unsaturated fatty acid ratio with the optimal range of omega-6 (ω-6) to omega-3 (ω-6) fatty acid ratio having minimal cost in oil blend was assessed. Palm oil, rice bran oil, linseed oil and sunflower oil were used to develop the model oil blend to confirm the ideal fatty acid ratio as laid down by health agencies. Blending of oil has altered the fatty acids composition of saturated fatty acid, mono unsaturated fatty acid and poly unsaturated fatty acid to a desired level and thus resulted in a significant change in physico-chemical characteristics. As the developed model oil has an optimal combination of fatty acids with an appropriate ratio of ω-6:ω-3 fatty acids, makes it healthier alternative.
    Asian Journal of Chemistry 02/2014; 26(4):1145-1150.
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    ABSTRACT: The effects on algae removal imposed by ultrasound technology employing different combinations of parameters, including frequency, power and irradiation time, were estimated using response surface methodology. This technology was applied in the backwater area of Pengxi river in the three Gorges Reservoirs. Results showed that, the algae removal rate by ultrasound was 64.1 %, at an optimal frequency of 45 kHz, input power of 60 W and irradiation time of 48 s. After 2 h of ultrasound irradiation on the 500 m2 study field, the algae density dropped from (1.10 ± 0.02) × 107 to (2.1 ± 0.1) × 106 cells/mL. Chlorophyll-a concentration dropped to 13.8 % of its initial amount algae were effectively controlled. Ultrasound technology is concluded to be effective for algae removal and can thus be applied to algal blooms.
    Asian Journal of Chemistry 02/2014; 26(4):1165-1170.
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    ABSTRACT: Removal of metal ions from waste-water streams is a hot issue for environmental protection. In this study, adsorption capacity of spent Eugenia jambolana leaves was investigated for removing chromium(III) and nickel(II) from aqueous medium. FT-IR and chemical characterization of Eugenia jambolana leaves helps to investigate the mechanism of adsorption. Adsorption parameters were optimized and isothermal studies were carried out. It indicated that chemisorption mode is more predominant over physiosorption of Ni(II) and Cr(III) with maximum adsorption capacity 6.003 and 3.815 mg/g, respectively. Feasibility of process is confirmed by separation factor values: 0.25 and 0.141 for Ni(II) and Cr(III) correspondingly and Gibb’s free energy values: -6.971 and -5.212 KJ/mol for Ni(II) and Cr(III), respectively. Heats of adsorption for Ni(II) and Cr(III) removal by Eugenia jambolana leaves were -1.349 and -0.0384 KJ/mol, respectively. The results shown that Eugenia jambolana leaves can be used on industrial scale for removal of heavy metals.
    Asian Journal of Chemistry 02/2014; 26(3):644-648.
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    ABSTRACT: The present study is carried out to find the extraction, physico-chemical analysis and toxicology with in vitro microbial screening characters of the Indian rubber seed oil. Vibrational studies of the oil exemplify the characteristic strong absorption at 1741 and 1461 cm–1 for –C=O and –C=C– groups respectively and did not give any idea about the presence of cyanide peak. Both the 1H NMR and 13C NMR spectral studies specify that the presence of triacylglycerol groups were saturated in addition to unsaturated. Determination of cyanide by means of colorimetric method was verified and there is no any absorption observed. This can be attributed that no hazardous linamarin were found in Indian rubber seed oil. Further, to estimate the potential of alternative hosts for oil production and influence of this oil with some common pathogenic microorganisms were also screened by well-diffusion techniques.
    Asian Journal of Chemistry 02/2014; 26(3):729-732.
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    ABSTRACT: In the present study a simple and novel high-performance thin-layer chromatography (HPTLC) method for quantitative determination of glycyrrhizin at stomach pH and its comparison with normal pH has been developed for marketed antistress liquorice root capsules and herbal tea. Chromatography was performed by using solvents including ethyl acetate:glacial acetic acid:methanol:water in proportion of 5:2:2:1, v/v/v/v as mobile phase. The developed plate was scanned and quantified densitometrically at absorption maxima 254 nm. The system was found to give compact spot for glycyrrhizin (Rf = 0.29 ± 0.001). The linearity relationship was described by the equation: Y = 2.103X + 25.289. Linearity range for glycyrrhizin was 100-1000 ng (r2 = 0.996). The amount of glycyrrhizin was estimated by comparing the peak area of standard and the same was present in the crude extract of antistress herbal formulations. The content of glycyrrhizin in 1 g of drug material at normal pH (i.e. 6.8) of methanol was estimated as 7.50 % w/w and 6.05 % w/w in a dose of sample liquorice root and herbal tea, respectively. At pH 2.58 the glycyrrhizin concentration declined to 5.43 % w/w and 3.28 % w/w in sample liquorice root and herbal tea, respectively. The method was validated for precision, accuracy, recovery, robustness, specificity, detection and quantification limits in accordance with ICH guidelines.
    Asian Journal of Chemistry 01/2014; 26(3):874-878.
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    ABSTRACT: Millet (Panicum miliaceum L.) cultivars from China and Korea were analyzed using HPLC to determine the levels of 5 different carotenoids: lutein, zeaxanthin, b-carotene, 9-cis-b-carotene and 13-cis-b-carotene. There was a significant difference in carotenoid content among cultivars from the 2 locations, with the Chinese cultivars generally having a higher content than the Korean cultivar. Lutein was present at the highest concentration in all of the cultivars, but was 34, 33 and 16 % higher in Joongback (China) than in Joongjukyumi (China), Hwangguem (Korea) and Joongjuk (China), respectively. Joongback also contained 58, 55 and 37 % higher concentrations of zeaxanthin than Joongjukyumi, Hwangguem and Joongjuk, respectively and a 33 % higher concentration of b-carotene than Hwangguem (Korea). The other two carotenoids (9-cis-b-carotene and 13-cis-b-carotene) were present at similar levels in all 4 cultivars. The results suggest that the millet cultivar Joongback from China could potentially be used as a source of carotenoids in the human diet.
    Asian Journal of Chemistry 01/2014; 26(2):464-466.
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    ABSTRACT: Nine different bitter melon cultivars collected from Japan and Philippines were analyzed to distinguish the levels of three different carotenoids i.e., lutein, a-carotene and b-carotene using HPLC. The carotenoid content varied significantly among the cultivars from the 2 locations. In general, the carotenoid contents in the Philippines cultivar was higher than in the Japanese ones, with the highest content found in Galaxy from Philippines and the lowest in the cultivar Kyushu from the Japanese cultivar. The levels of lutein in the Galaxy cultivar were 2.9 and 2.8 times higher than Kyushu and Trident 357 cultivars, respectively. The cultivar Galaxy from Philippines contained 3.7, 3.1 and 3.0-fold higher a-carotene compared to Kyushu, Sta. Rita Strain. L and Peacock, respectively. The levels of b-carotene in the Galaxy cultivars were 3.9, 2.9 and 2.8 times higher than that of Kyushu, Sta. Rita Strain. L and Peacock, respectively. The results suggest that the bitter melon cultivar Galaxy could potentially be used as a source of carotenoid.
    Asian Journal of Chemistry 01/2014; 26(2):461-463.
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    ABSTRACT: Mustard (Brassica juncea) is an important oil crop in the Brassicaceae family, containing a variety of amino acids. The present study investigated the variation in amino acids among the different tissues of green and red mustard cultivars. The levels of these amino acids varied significantly among tissues and between cultivars. A markedly higher quantity of all of the amino acids was observed in young leaf tissue, compared to other parts of the plant, in both cultivars. Among the free amino acids, concentrations of leucine, lysine, arginine, alanine, valine and phenylalanine were much higher than those of any other amino acids. In green mustard cultivars, young leaf tissue contained 3.6, 1.3, 17.5 and 63.2 times greater total amino acid content than stem, flower, seed and root, respectively. Young leaf tissue of red mustard cultivars contained 11.56, 1.1, 9.6 and 35.1 times greater total amino acid content than stem, flower, seed and root, respectively. Considering the total amino acid contents from all organs, the green cultivar contained 1.3 times more amino acids than the red cultivar. Present results demonstrate that mustard cultivars contain varying amounts of free amino acids among plant tissues and suggest that these cultivars have excellent potential to serve as a source of amino acids in vegetable plants
    Asian Journal of Chemistry 01/2014; 26(2):396-398.
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    ABSTRACT: The complex [Eu(L)3(phen)] (where L = 2'-hydroxy-4'-methoxy-2-phenylacetophenone, phen = 1,10-phenanthroline) was synthesized and characterized, by elemental analysis, energy dispersive X-ray spectroscopy, 1H NMR spectroscopy infra red spectroscopy, TGA/ DTA, scanning electron microscopy and the excitation as well as emission spectrum. The [Eu(L)3(phen)] had regular shaped particles with size less than 1 μm without any phase separation and on excitation at 344 nm emits bright red luminescence with main peak at 614 nm. The complex emitting red luminescence might be used to make the electroluminescent devices for display purposes.
    Asian Journal of Chemistry 01/2014; 26(2):583.
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    ABSTRACT: The complex [Eu(L)3(bipy)] (where L = 2'-hydroxy-4'-methoxyacetophenone, bipy = 2, 2'-bipyridine) was synthesized and characterized by elemental analysis, energy dispersive X-ray spectroscopy, 1H NMR spectroscopy, infra red spectroscopy, TGA/DTA, scanning electron microscopy and the excitation as well as emission spectrum. The [Eu(L)3(bipy)] had regular shaped particles with size less than 1 μm without any phase separations and on excitation at 384 nm emits bright red luminescent with main peak at 612 nm. The complex emitting red luminescent might be used to make the electroluminescent (EL) devices.
    Asian Journal of Chemistry 01/2014; 26(2):597.

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