We demonstrate that refinery-grade propane/propylene mixtures, rather than polymer-grade propylene, can be used for industrial propylene hydroformylation with Rh/BiPhePhos catalyst complexes. Because propylene hydroformylation is selective, an enriched propane stream is produced, which may be re...

β-Diimine nickel complexes have been synthesized using phenyl-amino-based ligands (NPh) substituted with none, two or three methyl groups. The resulting complexes, NiNPh, NiNPhMe2 and NiNPhMe3, which associated with ethylaluminum sesquichloride (EASC) as a co-catalyst, were tested for propylene...

Ag2+(b) species were detected by electron paramagnetic resonance (EPR) on silver loaded over ceria by impregnation in a previous work. Contrasting the EPR simulation with the experimental measurements evidenced that, upon propene oxidation, the Ag2+(b) species transform into two clusters each co...

The base-catalyzed, gas-phase epoxidation of propylene glycol acetates to propylene oxide (PO) is carried out in a laboratory-scale fixed-bed reactor. Potassium salts (0.5–2.5 mmol K/g) on silica are identified as selective catalysts for the reaction. A temperature of 400 °C at high space velo...

In this manuscript, we report the synthesis, NMR and single-crystal structures of three propylene linking dimers related with the hydrolytic degradation of one 5,6-dehydronorcantharimide dimer. Special attention was paid to the conformation of propylene linkers in order to understand their chang...

The nitrosoureas derived from 3 naturally occurring ureides were administered to rats and the velocity sedimentation of hepatic DNA in alkaline and neutral sucrose gradients determined. The potent hepatocarcinogen 1-nitroso-5,6-dihydrouracil induced apparent double strand as well as single stran...

We tested the ability of phenobarbital and two liver carcinogens, acetoxime and 1-nitroso-5,6-dihydrouracil (NDHU), to induce hyperplastic liver nodules (HLN) in MRC-Wistar and Wistar rats, using a system that included a single diethylnitrosamine (DEN) treatment, partial hepatectomy, and adminis...

In present study, surface light scattering (SLS) was used for the simultaneous determination of liquid surface tension and kinematic viscosity of the binary and ternary mixtures of three fatty acid ethyl esters (FAEEs) and n-dodecane. The SLS apparatus was firstly checked with n-dodecane and a g...

In this work, four heteroleptic Ni(II)dppe dithiolates complexes, [Ni(NED)(dppe)] (Ni-NED), [Ni(ecda)(dppe)] (Ni-ecda), [Ni(i-mnt)(dppe)] (Ni-i-mnt) and [Ni(cdc)(dppe)] (Ni-cdc) (dppe = 1,2-bis(diphenylphosphino)ethane; NED = 1-nitroethylene-2,2-dithiolate; ecda = 1-ethoxycarbonyl-1-cyanoethyele...

Single crystals of bis(κ2S,S′-di(isopropyl)dithiocarbamato) nickel(II) were utilized as a single source precursor for the formation of NiS via thermolysis. The complex decomposed at ∼250 °C to form α-NiS exclusively with no β-NiS detected. Analysis of the thermolysis regime using in situ t...

2-Trimethylsilylmethyl and 2-trimethylstannylmethyl-1,3-butadiene undergo facile cycloaddition with dienophiles, and show high regioselectivity with unsymmetrical dienophiles.

A series of monoazo dyes has been synthesised from 2- and 3-amino-benzo[b]thiophene diazo components. The spectroscopic properties of the dyes were compared with literature data and theoretical expectations. Dispersions of the dyes were applied to hydrophobic fibres; the colorimetric and fastnes...

RNA interference-based therapies are dependent on intracellular delivery of siRNA. The release of siRNA from the endosomal compartment may be a rate limiting step in the transfection process. The purpose of this study was to produce pH–responsive nanocarriers made of trimethylchitosan (TMC). To...

The application of hydrophobic polymers to stone materials is an effective way to preserve stone artifacts and to protect them from decay. To improve the characteristics and performance of water-repellent treatments, and to avoid the use of harmful solvents, new solutions have recently been expl...

In consequence of some unique properties, such as nanophase separation, biocompatibility and mechanical stability, amphiphilic polymer conetworks (APCNs) have received significant attention in recent years. APCNs are composed of hydrophilic and hydrophobic polymer chains connected with covalent ...

The main objective of this study was to develop a local, oral mucoadhesive metronidazole benzoate (MET) delivery system that can be applied and removed by the patient for the treatment of periodontal diseases. The results of present study revealed that the retention time of MET at its absorption...

The objective of this study was to prepare pH sensitive polymethacrylic acid-calcium deficient hydroxyapatite (CDHA) nanocomposites. The CDHA nanoparticles were prepared by coprecipitation method. The modification of CDHA by methacrylic acid (MA) was achieved by AIBN initiated free radical polym...

Two distinct types of micelle structures have been successfully obtained from poly(ethylene oxide-b-methacrylic acid) (PEO-b-PMAA) in aqueous solutions: one with a PEO-core surrounded by a PMAA corona and the other with a PMAA-core surrounded by a PEO-corona. The PEO-core micelles were obtained ...

Poly(methacrylic acid)-b-poly(ethylene oxide) are double hydrophilic block copolymers, which are able to form micelles by complexation with a counter-polycation, such as poly-l-lysine. A study was carried out on the ability of the copolymers to interact with model membranes as a function of thei...

Calcium oxalate was synthesized from calcium chloride solution using oxalic acid in the presence of di sodium salt of ethylenediaminetetraacetic acid (EDTA) and commercially available1-hydroxyethylidene-1,1-diphosphonic acid (HEDP), aquasoft having chelating value 330 (AQ 330). The experiments w...