Despite of the extensive study for peptide synthesis, DCC-mediated esterification is left still unclear. Therefore, DCC- and DCC/HOBt-mediated reactions of 3-phenylpropionic acid (1) with benzyl alcohol were carried out under several mechanistic considerations. Further, in order to determine the...

3-Phenylpropionic acid (2) is an intermediate for the anti-aids drug Indinavir. The one step conversion of cinnamaldehyde (4) into 2 was attempted using homogeneous ruthenium catalysts. Use of [H2Ru(Ph3P)4] induced mainly decarbonylation of 4 to give styrene. Use of RuCl3PCy3 gave a mixture of 2...

Marine aerosols were collected over the western North Atlantic off the coast of Boston to Bermuda in August 2012 using a high-volume air sampler. Aerosol samples were analyzed for organic and elemental carbon (OC/EC), low molecular weight dicarboxylic acids and related compounds, lipid class com...

To meet new regulations, alternative plasticizers to di(2-ethylhexyl) phthalate (DEHP) are now commonly used in the manufacturing of medical devices. These are: acetyl tri-n-butyl citrate (ATBC), bis (2-ethylhexyl)adipate (DEHA), dioctyl terephtalate (DEHT), di-isononylphtalate (DINP), diisonony...

F344 male rats were given five consecutive weekly subcutaneous injections of folic acid for induction of chronic renal dysfunction and then di(2-ethylhexyl)phthalate (DEHP) or di(2-ethylhexyl)adipate (DEHA) in the diet at a concentration of 0, 6000 or 25,000 ppm for 4 weeks in order to investiga...

Citrate esters are considered functional alternatives to phthalate plasticizers, but their toxicity remains poorly understood. The toxicity of citrate esters, including triethyl 2-acetylcitrate (ATEC) and trihexyl O-acetylcitrate (ATHC), were examined together with that of bis (2-ethylhexyl) pht...

The article reports self-diffusivity measurements of dimethyl (DMA), diethyl (DEA), dipropyl (DPA), dibutyl (DBA), and bis(2-ethylhexyl) (DEHA) adipates from (293–339) K by the PGSE–NMR technique. The expanded uncertainty of the results is estimated to better than ±2%. The results are interpr...

The article reports density measurements of dipropyl (DPA), dibutyl (DBA) and bis(2-ethylhexyl) (DEHA) adipates, using a vibrating U-tube densimeter, model DMA HP, from Anton Paar GmbH. The measurements were performed in the temperature range (293 to 373) K and at pressures up to about 68 MPa, e...

An efficient and convenient aryl sulfonyl introducing strategy for the synthesis of 3-sulfonyl coumarins via ipso-cyclization/1,2-ester migration from substituted phenyl 3-phenylpropiolates with disulfides and potassium persulfate as sulfonylating reagents was developed, halogen and many other e...

A method for the first direct insertion of difluorcarbene, generated from TMSCF3, into diselenides and disulfides is disclosed, producing novel difluoromethyl diselenoacetals and difluoromethyl dithioacetals. The reaction conditions tolerate a range of synthetically useful and biologically relev...

The ligands 2-((2-aminophenyl)diazenyl)phenol, HOL1-NH2, 1a; 2-((2-aminophenyl)diazenyl)-5-methylphenol, HOL2-NH2, 1b; and 2-((2-aminophenyl) diazenyl)-5-chlorophenol, HOL3-NH2, 1c, which are abbreviated as HOL-NH2, 1, afforded the complexes of compositions [(OL-NH)Pd(PPh3)], 2, and [(OL-NH)Ru(C...

Butterflies and moths differ significantly in their daily activities: butterflies are diurnal while moths are largely nocturnal or crepuscular. This life history difference is presumably reflected in their sensory biology, and especially the balance between the use of chemical versus visual sign...

We report on fabrication of 320 × 256 dual-band (mid-/long-wave infrared) type-II InAs/GaSb strained layer superlattice (T2LS) focal plane array (FPA) with pBp architecture. The simplified fabrication procedure has been utilized to reveal the fundamental electro-optical performance of both abso...

The rapidly growing problem of new psychoactive substances (NPS) makes the time management for international control a real challenge, with the traditional detection methods becoming increasingly inadequate. NPS screening technologies, such as NMR, which allows multiple substances to be detected...

Terahertz radiation from an accelerator-based light source at the PBP-CMU Electron Linac Laboratory is aimed for terahertz transmission imaging purpose. Femtosecond electron bunches are accelerated with a linear accelerator and are guided to hit an aluminium radiator to produce coherent transiti...

SummaryNon-ribosomal peptides (NRPs) are biosynthesized on non-ribosomal peptides synthetase (NRPS) complexes, of which a C-terminal releasing domain commonly offloads the products. Interestingly, a dedicated releasing domain is absent in surugamides (SGM) NRPS, which directs the biosynthesis of...

Among 547 Haemophilus influenzae isolates recovered in our center, 45 displayed a phenotype of loss of PBP 3 affinity (8.2%). Two isolates with 6 substitutions in PBP 3 showed decreased susceptibility to third-generation cephalosporins. Clinical data revealed clinical failure after ceftriaxone t...

In the present study, cyanobacterium BTA 170 was isolated from Manipur, India and was phylogenetically related to Oscillatoria sp. The biomass of BTA 170 contained 6.5% of ash, 32.25% of carbohydrate, 37.44% of protein, 22.31% of lipid and 1.5% of moisture. 0.3 M of glycine and 5 mM of sodium gl...

Horner-Wadsworth-Emmons condensation of (α-fluoropropargyl) phosphonate ester 3 and p-anisaldehyde provides a new method for the synthesis of monofluoro-conjugated enynes. Spontaneous crystallization of 4 yielded the Zisomer of 2-fiuoro-1-(p-methoxyphenyl)-1-penten- 3-yne. A comparison of bond ...

In the present work, the temperature dependence of the molar heat capacity of chitosan-graft-poly(2-ethylhexyl acrylate) copolymer was measured for the first time in the temperature range from 6 to 350 K by precise adiabatic calorimetry, and the thermophysical properties of copolymer were studie...