The title compound, C(26)H(20)O(2), has long been known, but was not structurally characterized until now. It adopts the Z conformation and the atoms comprising the ester linkage are essentially coplanar (r.m.s. deviation of 0.0234 Å). The acyl C-O bond length of 1.470 (2) Å falls within the normal range seen for esters of tertiary alcohols and is below the value of 1.496 Å found in tri-tert-bu...

• draw the mechanism of ester hydrolysis under acidic and basic reaction conditions; • account for the irreversibility of the hydrolysis reaction under basic conditions; • form new esters by baseor acid-catalysed transesterification mechanisms; • draw the mechanism for cleaving tert-butyl esters and understand why the mechanism is different from that for methyl esters; • understand why protonat...

Polytriarylamine copolymers can be prepared by Suzuki-Miyaura cross-coupling reactions of bis N-methyliminodiacetic acid (MIDA) boronate ester substituted arylamines with dibromo arenes. The roles of solvent composition, temperature, reaction time, and co-monomer structure were examined and (co)polymers prepared containing 9, 9-dioctylfluorene (F8), 4-sec-butyl or 4-octylphenyl diphenyl amine (...

The current study was carried out to evaluate the in-vitro and in-vivo efficiency of alphaglucosidase inhibitor of marine actinobacteria in the control of postprandial hyperglycaemia.Soil samples were collected from salterns, coastal area in Kothapatnam, Ongole, AndhraPradesh, India. Among the actinobacterial isolates tested for yeastα-glucosidase inhibitoryactivity, only three isolates showed ...

Fatty acid butyl esters were synthesized from sunflower oil with 1-butanol using a homogeneous Rhizomucor miehei lipase in a biphasic organic (triglyceride, 1-butanol, hexane)- water (with enzyme) system in a continuous setup consisting of a cascade of a stirred tank reactor and a continuous centrifugal contactor separator (CCCS), the latter being used for integrated reaction and liquid-liquid ...

Introduction Tissue conditioners are used for conditioning of denture-bearing inflamed mucosa by ill-fitting dentures prior to fabricating new dentures, for relining the existing dentures, and for provisional relining of immediate dentures and ill-fitting dentures [1-2]. Tissue conditioners have also been used as functional impression materials [1-3]. Their efficacy as functional impression mat...

This study describes a fast and accurate method for the sample preparation, identification, and quantitation of nitrilotriacetic (NTA) acid in environmental aqueous samples at a concentration of ppb level. The method is sensitive, specific, and free from the interferences of fatty and amino acids. The tri-n-propyl- and tri-n-butyl-NTA acid esters were prepared by the reaction of n-propyl-HCl an...

The biological properties of plant oils are improved by their conversion to nanoemulsions (NEs). This study evaluated the antimicrobial, antioxidant, and anti-hemolytic efficacy coconut salad rocket NEs. result gas chromatography-mass spectroscopy analysis showed varied constituents such as palmitic acid, trimethylsilyl ester; 2,3-bis(acetyloxy)propyl laurate in oil, 2-lauro-1,3-didecoin, n-but...

High concentration of Cs is present in high-level radioactive waste. It well-known that an alkali element and difficult to extract completely into organic phase. Crown ether compounds are widely available for extractants; DtBuDB18C6 (di-t-butyl-dibenzo-18crown6), was used this study. Organic solvents the industrial applications, such as n-dodecane 1-octanol, have low solubility concerning compo...