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Synthesis and characterization of vanadium oxides nanorods 总被引:1,自引:0,他引:1
Vanadium oxides nanorods with high crystallinity and high surface area were synthesized by hydrothermal method using laurylamine hydrochloride, metal alkoxide and acetylacetone. The samples characterized by XRD, nitrogen adsorption isotherm, SEM, TEM, and SAED. Uniformly sized B phase VO2 nanorods had widths about 40-80 nm and lengths reaching up to 1 μm. V2O5 rodlike structured with the widths about 100-500 nm and the lengths of 1-10 μm were obtained by calcination at 400 °C for 4 h. This synthesis method provides a new simple route to fabricate one-dimensional nanostructured metal oxides under mild conditions. 相似文献
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Masahiko Isaka Somporn PalasarnSomjit Komwijit Sayanh SomrithipolSujinda Sommai 《Tetrahedron letters》2014
Cyclodepsipeptides SCH 217048 (1), SCH 218157 (2), and a new analog, pleosporin A (3), were isolated from cultures of an unidentified elephant dung fungus of the family Pleosporaceae. The structure of 3 was elucidated on the basis of detailed spectroscopic interpretation. The absolute configurations of 1–3 were determined by chiral column HPLC analysis and Marfey’s method. Cyclodepsipeptides 1–3 exhibited antimalarial activity against Plasmodium falciparum K1 with respective IC50 values of 1.6, 6.4, and 1.6 μg/mL, while they did not show cytotoxicity against KB, MCF-7 and NCI-H187 cell-lines or non-cancerous Vero cells at 50 μg/mL. 相似文献
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Masahiko Isaka Somporn PalasarnPanida Chinthanom Jiraporn ThongtanMalipan Sappan Sayanh Somrithipol 《Tetrahedron letters》2012,53(36):4848-4851
New 4-pyrone and 4-pyridone derivatives, poronitins A (1) and B (2), and a new isocoumarin, 3,4-dihydro-6,8-dimethoxy-4-hydroxy-4-methyl-3-methyleneisochromen-1-one (3), were isolated from cultures of the elephant dung fungus, Poronia gigantea. The structures were elucidated on the basis of the NMR and MS data. Poronitin A (1) and known (R)-5-methylmellein were detected in all cultures (4 strains) of P. gigantea, which suggested that these metabolites maybe useful as chemotaxonomic markers. 相似文献
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Dilip Kumar Saha Sommai Patitungkho Subhash Padhye Dileep N. Deobagkar Aarti Ozarkar Mohan M. Bhadbhade Rajesh G. Gonnade 《Transition Metal Chemistry》2005,30(3):334-340
The X-ray crystal structures of two ciprofloxacin compounds, viz. [Cu(cfH)2(Cl)2] · 2MeOH · 6H2O (2) and [Cu(cfH)(phen)Cl]BF4 · 4H2O (3) are reported. Complex (2) has a distorted octahedral geometry, whereas for the nitrogen adduct (3) a distorted square–pyramidal geometry is seen. Significant enhancement in the antimycobacterial activity of the copper conjugates correlates with their copper redox couples (Cu2+ /Cu+) probably due to its relevance to intracellular accumulations and subsequent role in generating oxidative stress. 相似文献
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Masahiko Isaka Somporn Palasarn Sujinda Sommai Pattiyaa Laksanacharoen Kitlada Srichomthong 《Natural product research》2018,32(13):1506-1511
A maleic anhydride derivative, botryoanhydride (1), and a chromone derivative, botryochromone (2), together with three known chromones, eugenitin (3), 6-hydroxymethyleugenin (4) and 6-methoxymethyleugenin (5), were isolated from cultures of the endophytic fungus BCC 54265 of the family Botryosphaeriaceae. The structures were elucidated on the basis of NMR, HRMS and CD data. Compound 2 showed weak cytotoxic activity to cancer cell-lines. 相似文献
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Masahiko Isaka Somporn Palasarn Sujinda Sommai Sukitaya Veeranondha Kitlada Srichomthong Palangpon Kongsaeree Samran Prabpai 《Tetrahedron》2017,73(12):1561-1567
Seven new lanostane triterpenoids, astraeusins M–Q (1–5), 26-epi-artabotryol C1 (6), and 26-epi-astrasiaone (7), together with seventeen known compounds (8–24), were isolated from the food mushroom Astraeus asiaticus. The C-26 configuration of artabotriol C1 and astrasiaone, originally reported as 26R (6 and 7, respectively), was revised to be 26S (16 and 17, respectively). Astraeusin M (1) exhibited antimalarial activity against Plasmodium falciparum K1 with an IC50 value of 3.0 μg/mL. 相似文献
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