نتایج جستجو برای: acridine 18 dione
تعداد نتایج: 359131 فیلتر نتایج به سال:
Acridine orange is a metachromatic intercalator used extensively in histochemistry to differentiate double- from single-stranded (ds, ss) nucleic acid by the emission of green and red fluorescence, respectively, under ultraviolet light. In the present study we standardised a protocol in order to use acridine orange to detect rotavirus ds RNA in polyacrylamide gels and compared it to silver and ...
Triple helix formation usually requires an oligopyrimidine*oligopurine sequence in the target DNA. A triple helix is destabilized when the oligopyrimidine*oligopurine target contains one (or two) purine*pyrimidine base pair inversion(s). Such an imperfect target sequence can be recognized by a third strand oligonucleotide containing an internally incorporated acridine intercalator facing the in...
Two new 5,12-disubstituted 2,3-di-ethyl-naphtho-[2,3-g]quinoxaline-6,11-dione compounds were readily synthesized from the commercial dye quinizarin. For 2,3-diethyl-5,12-di-hydroxy-naphtho-[2,3-g]quinoxaline-6,11-dione, (II), C20H16N2O4, the mol-ecule displays a near planar conformation and both hy-droxy groups participate in intra-molecular O-H⋯O(carbon-yl) hydrogen bonds. In the crystal, π-π ...
A fluorescence quenching method was used to determine the equilibrium binding constants for the association of acridine, acridine orange, and acridine yellow G to humic acid. The fluorescence of each polycyclic aromatic nitrogen heterocycle (PANH) was monitored as aliquots of humic acid were added, and a Stern-Volmer plot was produced in which the slope is the equilibrium constant of the bindin...
The mutagenic activities of benz(a)acridine, benz(c)acridine, and a number of their derivatives, including 12 epoxides and diol-epoxides, were examined in bacterial and mammalian cells to determine the importance of bay-region activation of azapolycyclic aromatic hydrocarbons. In Salmonella typhimurium strain TA98, the diastereomeric bay-region 3,4-diol-1,2-epoxides of benz(c)acridine, in which...
در این پروژه، سه کمپلکس تک هسته ای از ru(iii) با فرمول های [rucl3(phen-dione)(ch3cn)3]، [rucl(phen-dione)(tptz)](pf6)2 و [rucl(phen-dione)(ch3cn)3](pf6)2 سنتز شد (که در آنها phen-dione=1 و10- فنانترولین- 5 و6- دی اون و tptz= 2 و4 و6- تریس(2- پیریدیل) 1 و3و 5- تری آزین می باشد). کمپلکس های سنتز شده با روش های ft-ir، آنالیز عنصری و uv-vis شناسایی شدند. فعالیت الکتروکاتالیستی کمپلکس ها برای کاهش c...
The objective of this study was to synthesize several new pregnane derivatives and evaluate them as antiandrogens. From the commercially available 16-dehydropregnenolone acetate (7), two new steroidal compounds were synthesized: 17alpha-hydroxy-17beta-methyl-16beta-phenyl-D-homoandrosta-1,4,6-triene-3,20-dione (18) and 17alpha-acetoxy-17beta-methyl-16beta-phenyl-D-homoandrosta-1,4,6-triene-3,20...
AROMATICINE (SYSTEMATIC NAME: 4a,8-dimethyl-3-methyl-ene-3,3a,4,4a,7a,8,9,9a-octa-hydro-azuleno[6,5-b]furan-2,5-dione), C(15)H(18)O(3), is a natural lactone isolated from Amblyopappus pusillus. The mol-ecular structure and conformation agree with the results of Romo, Joseph-Nathan & Díaz [(1964 ▶). Tetra-hedron, 20, 79-85]. The fused-ring system contains a seven-membered ring in a twist-boat co...
The title compound, C(18)H(21)NO(3), was obtained via a double Mannich condensation reaction of 6-methyl-tetra-hydro-isobenzofuran-1,7(3H,7aH)-dione with formaldehyde and benzyl-amine. The mol-ecule contains three fused rings of which the cyclo-hexa-none and piperidine rings adopt chair conformations and the furan-one ring assumes an envelope conformation. An inter-molecular C-H⋯π inter-action ...
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