نتایج جستجو برای: toluene sulfonic acid
تعداد نتایج: 754583 فیلتر نتایج به سال:
The rodlike ionogenic polymers poly(p-pyridylene-phenylene) and poly(p-pyridylene/phenylene-ethynylene) form polyelectrolytes when protonated with toluene sulfonic acid or ethane sulfonic acid in chloroform solution. This molecular modification, clearly indicated by a marked red shift of the UV absorption band, induces the formation of prolate, bundlelike aggregates, whose size and shape are ob...
قارچ ها به عنوان یکی از مهمترین عوامل بیماریزای گیاهی، منبع اصلی از متابولیت های ثانویه بیواکتیو هستند، و از اهمیت قابل توجهی در فعل و انفعالات زیست محیطی برخوردار می باشند از جمله متابولیت ها می توان آنتی بیوتیک ها، توکسین ها و آنزیم ها را نام برد. در این پژوهش شناسایی متابولیت های ثانویه تولید شده در 21 گونه قارچی با کمک gc – ms انجام گردید. نتایج حاصل از بررسی قابلیت ضد باکتریایی، ضد قارچی، ...
Single step pretreatment-saccharification of corn stover was investigated in aqueous p-toluenesulfonic and sulfuric acid media. Dilute aqueous solution of p-toluenesulfonic acid was a better catalyst than aqueous sulfuric acid of the same H(+) ion concentration for single step pretreatment-saccharification of corn stover at moderate temperatures and pressures. For example, 100mg corn stover hea...
4-chloromethyl styrene homopolymer and its copolymers with styrene were prepared from their corresponding 4-chloromethyl styrene and styrene monomers at 1:0, 1:1, 1:3 and 1:5 mole ratios. these homo- and copolymerswere synthesized by radical polymerization in presence of aibn as initiator and dry toluene as solvent. then, chloromethyl groups were converted into azidomethyl groups on the homo- a...
In the title compound, [Pd(C(7)H(7)O(3)S)(2)(C(13)H(14)N(2))(2)](n), the metal ion, located on a twofold rotation axis, exhibits a slightly distorted octa-hedral coordination environment, with bond angles that deviate by at most 2.2° from an ideal geometry, completed by two O atoms from two deprotonated p-toluene-sulfonic acid ligands and four N atoms from four 1,3-di-4-pyridylpropane ligands. ...
Abstract In this paper, polypyrrole coated conductive fabrics were prepared using pyrrole as the monomer, p-toluene sulfonic acid doping agent and ammonium persulfate oxidant, adopting simple method of situ polymerization liquid phase. Six types polyester-cotton blended fabrics, nylon wool silk basalt aramid fabric respectively base materials same process conditions; its electrical conductivity...
The title compound, C(15)H(17)ClNO(2)S(+)·C(10)H(15)O(4)S(-)·C(3)H(6)O, was synthesized by N-alkyl-ation of α-amino-(2-chloro-phen-yl)acetate with 2-thienylethyl p-toluene-sulfonate, followed by reaction with (+)-camphor-10-sulfonic acid. In the crystal, the cations and anions are linked through N-H⋯O hydrogen bonds. The thio-phene ring of the cation was found to be disordered over two sites, w...
Silica boron sulfonic acid [SiO2–B(OSO3H)3] as an inexpensive, reusable, and Lewis and Brønsted acid catalyst was successfully synthesized, and used for the one-pot three-components synthesis of biologically active substituted Hantzsch 1,4-dihydropyridine derivatives in the absence of solvent at 90ºC. Silica boron sulfonic acid is attractive and efficient, because it plays in two role as a Lew...
The title compound, C(21)H(36)O(3), was obtained by treatment of cyclo-hexa-necarbaldehyde with catalytic toluene-4-sulfonic acid monohydrate. This redetermination results in a crystal structure with significantly higher precision than the original determination [Diana & Ganis (1963 ▶). Atti Accad. Naz. Lincei, 35, 80-88]. The asymmetric unit contains one sixth of the mol-ecule, the formula uni...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید