Working in the context of symmetric spectra, we consider any higher algebraic structures that can be described as algebras over an operad O. We prove that the fundamental adjunction comparing O-algebra spectra with coalgebra spectra over the associated comonad K, via topological Quillen homology (or TQ-homology), can be turned into an equivalence of homotopy theories by replacing O-algebras wit...

Phloroglucinol and resorcinol are not substrates for clingstone peach (Prunus persica) polyphenol oxidase, but they react with 4-methyl-o-quinone, produced either enzymatically or nonenzymatically, to give an intense red or red-brown color with a maximal absorption at about 470 nanometers. Several colored products were isolated from an ethyl acetate extract of the reaction by two-dimensional th...

Ethyl naphtho[2,1-b]furan-2-carboxylate (2) on reaction with hydrazine hydrate in presence of acid catalyst in ethanol medium affords naphtho[2,1-b]furan-2-carbohydrazide (3). The reaction of substituted acetophenones (4a-c) with aromatic aldehydes (5a-e) produces chalcones (6a-o) via the Claisen condensation. The reaction of naphtho[2,1-b]furan-2-carbohydrazide (3) with chalcones (6a-6o) in pr...

The aerosol effects on clouds and precipitation in deep convective cloud systems are investigated using the Weather Research and Forecast (WRF) model with the Morrison two-moment bulk microphysics scheme. Considering positive or negative relationships between the cloud droplet number concentration (Nc) and spectral dispersion (o), a suite of sensitivity experiments are performed using an initia...

1. l-Serine O-sulphate and l-threonine O-sulphate are degraded in the presence of pyridoxal 5'-phosphate to yield equimolar amounts of the corresponding keto acid, ammonia and sulphate. 2. Pyridoxal catalyses the same reactions at a faster rate. 3. One of a number of bi- or ter-valent metal ions must be present for these degradations to proceed. The reaction rates are dependent on a number of f...

Formation of carbinolamine, imine, and oxazolidines from the reactions of desisopropylpropranolol (5), its O-methyl ether (10), and 3-(1-naphthoxy)propylamine (11) with trifluoroacetone and trifluoroacetaldehyde methyl hemiacetal was investigated by F NMR and tandem mass spectrometry. Products from the metabolism of the related secondary amine substrates trifluoropropranolol (7), its O-methyl e...

Two new sulfated triterpenoid saponins, zygophylosides Q (1) and R (2), have been isolated from the barks of Zygophyllum fabago L. Their structures were elucidated as 3beta,24,28,30-tetrahydro-urs-20-ene-24-O-sulphonyl-3-O-[beta-D-glucopyranosyl]-30-O-beta-D-glucopyranoside and 3beta,24,28,30-tetrahydro-urs-20-ene-24-O-sulphonyl-3-O-[beta-D-xylopyranosyl]-30-O-beta-D-glucopyranoside, respective...

Respiration in support of N(2) fixation by rhizobia in legume root nodules depends on an adequate supply of O(2), but excessive O(2) can damage nitrogenase, the key enzyme. The movement of O(2) into and within the nodule is driven by gradients in the concentration of O(2) or in the oxygenation of the O(2)-carrier, leghaemoglobin. Steeper gradients may increase flux to the sites of respiration, ...

Formation of carbinolamine, imine, and oxazolidines from the reactions of desisopropylpropranolol (5), its O-methyl ether (10), and 3-(1-naphthoxy)propylamine (11) with trifluoroacetone and trifluoroacetaldehyde methyl hemiacetal was investigated by F NMR and tandem mass spectrometry. Products from the metabolism of the related secondary amine substrates trifluoropropranolol (7), its O-methyl e...

The bark of Terminalia arjuna is known for its heart-health benefits in ayurvedic literature. This has been further supported by in vivo studies on animal and human volunteers. But there is no detailed study on identification of the active ingredients such as polyphenols. Polyphenols possesses antioxidant properties and are well-known health actives, it is important to characterise polyphenols ...