The recent research was directed to explore the phytochemical, antimicrobial and antioxidant activity of Hydrodictyon reticulatum L. samples were then identified morphologically anatomically. By using different solvents algal extracts prepared. phytochemical performed determine presence or absence alkaloids, steroids, tannin, triterpenoids, saponin, terpenoids, quinine, coumarins, phlobatannins...

Single-chain magnets (SCMs) are materials composed of magnetically isolated one-dimensional (1D) units exhibiting slow relaxation of magnetization. The occurrence of SCM behavior requires the fulfillment of stringent conditions for exchange and anisotropy interactions. Herein, we report the synthesis, the structure, and the magnetic characterization of the first actinide-containing SCM. The 5f-...

The inner salts x-H3N-closo-1-CB11H11 (x = 12, 2) and 7-H3N-12-F-closo-1-CB11H11 were fluorinated with elemental fluorine in anhydrous hydrogen fluoride to give the B-perfluorinated ammonio derivatives 1-H-x-H3N-closo-1-CB11F10 (x = 12, 7, 2). Deprotonation of the ammonio group yielded the corresponding amino-functionalized anions [1-H-x-H2N-closo-1-CB11F10](-) (x = 12, 7, 2) that were isolated...

The O-methyl substituents of aromatic compounds constitute a C(1) growth substrate for a number of taxonomically diverse anaerobic acetogens. In this study, strain TH-001, an O-demethylating obligate anaerobe, was chosen to represent this physiological group, and the carbon flow when cells were grown on O-methyl substituents as a C(1) substrate was determined by C radiotracer techniques. O-[met...

Ab initio calculations of depolarization ratios and intensities of classically scattered light, in terms of dipole polarizabilities and polarizability anisotropies, are reported for different hydrogen bonded molecular clusters. Five different groups of organic heterodimers formed with water are considered: HCHO · · ·H2O, CH3HO · · ·H2O, HCOOH · · ·H2O, CH3CN · · ·H2O, and (CH3)2CO · · ·H2O, tog...

Density functional theory (DFT) calculations are carried out to investigate partial oxidation of propylene over neutral VO 3 clusters. C=C bond cleavage products CH 3CHO + VO 2CH 2 and HCHO + VO 2CHCH 3 can be formed overall barrierlessly from the reaction of propylene with VO 3 at room temperature. Formation of hydrogen transfer products H 2O + VO 2C 3H 4, CH 2=CHCHO + VO 2H 2, CH 3CH 2CHO + V...

The dielectric constant and the pyroelectric coefficient at constant stress of 1-lithium hydrogen dimalate l-Li®(OOCCHOHCH 2CO O H )e (HOOCCHOHCH2COOH), were investigated in the temperature range 200 S 77K ^ Td (decomposition temperature) and 100 ^ T/K ^ Td, respec­ tively. The compound crystallizes in the space group P2j. In the direction of the 2, axis £22 increases with almost constant slope...

1 ABSTRACT The atmospheric General Circulation Model of the Laboratoire de M et eorologie Dynamique (LMD) is coupled to a slab ocean model and is used to investigate the climatic impact of a CO 2 doubling. Two versions of the model are used with two diierent representations of the cloud-radiation interaction. Both of them contain a prognostic equation for the cloud liquid water content, but the...