Three new types of Gemini amphiphiles (N ,N ?-bis-(4-decyloxybenzylidene)-ethane-1,2-diamine, N ,N ?-bis-(4decyloxy-2-hydroxybenzylidene)-ethane-1,2-diamine, and (N ,N ?-bis-(4-decyloxy-2-hydroxybenzylidene)-ethane-1,2diamine)copper(II) were synthesized. Their aggregation behaviors were studied by TEM observation and monolayer experiments. It was found that the vesicle formation and transformat...

The very sensitive, fairly selective direct spectrophotometric method for the determination of trace amount of vanadium (V) with naphthalene -1, 5 -diamine has been developed. Naphthalene -1, 5 -diamine reacts in slightly acidic (0.0001– 0.001 M H2SO4 or pH 4.0–5.5) alcohol media with vanadium (V) to give a red–violet chelate which has an absorption maximum at 531 nm. The stoichiometric composi...

polyethylene imide was synthesized from the reaction of high density polyethylene grafted maleic anhydride (pe-g-ma) and 1,4-diaminobutane in boiling xylene. the chemical compositions of the reaction products were examined by fourier transform infrared spectroscopy. different conditions and parameters like the effect of temperature, time, monomer concentration and oxygen on the extent of reacti...

Transparent, crack-free mesoporous silica sol–gel monolith 2 was prepared from the hydrolysis of Si(OMe)4 in MeOH containing ethylene glycol (HOCH2CH2OH). Gradual exposure of the product monolith 1 to MeOH/H2O and then H2O helps prevent cracking of the monolith. Direct reaction of chelating diamine H2N(CH2)2NH(CH2)3Si(OMe)3 with 1 gave diamine-grafted monolith 3. Imprint-grafting of monolith 1 ...

The tetrahydrosalens N,N'-bis(2-hydroxybenzyl)-ethane-1,2-diamine ((2)(1)), N,N'-bis(2-hydroxybenzyl)-(-)-1,2-cyclohexane-(1R,2R)-diamine ((2)(2)), N,N'-bis(2-hydroxybenzyl)-N,N'-dimethyl-ethane-1,2-diamine ((2)(3)), N,N'-bis(2-hydroxybenzyl)-N,N'-dibenzyl-ethane-1,2-diamine ((2)(4)), and N,N'-bis(2-(4-tert-butyl)hydroxybenzyl)-ethane-1,2-diamine ((2)(5)), as well as their prodrug glycosylated ...

New insights into the structural, electronic and catalytic properties of Fe complexes are provided by a density functional theory study of model as well as real [Fe(II)(H)(2)(diphosphine)(diamine)] systems. Calculations conducted using several different functionals on the trans- and cis-isomers of [Fe(II)(H)(2)(S-xylbinap)(S,S-dpen)] complexes show that, as with the [Ru(II)(H)(2)(diphosphine)(d...

This study aimed to evaluate the scientific evidence regarding the effectiveness of silver diamine fluoride (SDF) in preventing and arresting caries in the primary dentition and permanent first molars. A systematic review (SR) was performed by 2 independent reviewers using 3 electronic databases (PubMed, ScienceDirect, and Scopus). The database search employed the following key words: "topical ...

Vegetated filter strips (VFS) potentially reduce the off-site movement of herbicides from adjacent agricultural fields by increasing herbicide mass infiltrated (Minf) and mass adsorbed (Mas) compared with bare field soil. However, there are conflicting reports in the literature concerning the contribution of Mas to the VFS herbicide trapping efficiency (TE). Moreover, no study has evaluated TE ...

Diamine oxidase and peroxidase, associated with the wall in pinto bean (Phaseolus vulgaris L. var Pinto) leaves, can be washed out by vacuum infiltration and assayed without grinding the leaf. The diamine oxidase activity is inhibited in vivo by exposure of the plants to ozone (dose of 0.6 microliters per liter x hour), whereas the peroxidase activity associated with the wall space is stimulate...