Particle size distribution (PSD) is one of the critical attributes crystals. PSD not only influences downstream processes but also controls final product performance in crystallization. In this work, we have used model system methanol–water-paracetamol for carrying out anti-solvent crystallization to produce paracetamol With reference a base case stirred tank, three devices connected tank with ...

Abstract For the use of polymers as biomaterials in production implants, several processing methods are needed. Besides injection molding or Fused Deposition Modeling temperature based processes, also solvent processes were performed such solvent-casting and electrospinning. As fabrication medical devices makes potentially hazardous toxic solvents, they have to be extracted from final device. a...

Received (received date) Revised (revised date) We investigate a new method for simulating polymer-solvent systems which combines a lattice Boltzmann approach for the uid with a continuum molecular dynamics (MD) model for the polymer chain. The two parts are coupled by a friction force which is proportional to the diierence of the monomer velocity and the uid velocity at the monomer's position....

We have examined the direct arylation of imidazolinone (1) with 6 different palladium sources, 15 different phosphine ligands, 12 different bases and 14 different solvent systems. There is no significant difference between using Pd(OAc)2 and Pd(TFA)2. This reaction proceeds less efficiently or reproducibly with Pd2(dba)3/(o-biphenyl)PCy2, O=PCy3, O=PPh3, P(OMe)3, PCy3·HBF4, PCy3, PPBu /DMF, NMP...

The processes by which solvated electrons are generated and undergo recombination are of great interest in condensed phase physical chemistry because of their relevance to both electron transfer reactions and radiation chemistry. Although most of the work in this area has focused on aqueous systems, many outstanding questions remain, especially concerning the nature of these processes in low po...

With the use of appropriately chosen solvent pairs it is demonstrated that solvent dependence of peptide carbonyl carbon resonances can be correlated with polypeptide secondary structure. Solvent titrations show the peptide carbonyl which is intramolecularly hydrogen bonded to exhibit less chemical shift on going from a dimethylsulfoxide solution to a solution containing a solvent which is a go...

The impact of selected cellulose solvent systems based on the principal constituents tetrabutylammonium fluoride (TBAF), 1-ethyl-3-methyl-1H-imidazolium-acetate, N-methylmorpholine-N-oxide, or calcium thiocyanate octahydrate (CTO) on the properties of cellulose II aerogels prepared from these solvent systems has been investigated as a means towards tailoring cellulose aerogel properties with re...

The reaction between diaminomaleonitrile (DAMN) and aldehydes and the resulting monoimines are well known. Since the standard reaction conditions involve the use of toxic solvents (typically methanol), we have sought to apply green chemistry principles to this reaction by either using water as the solvent without any catalysts or employing "solvent-free" conditions. The monoimines derived from ...

zataria multiflora boiss is used in traditional folk remedies as antiseptic, analgesic, carminative, anthelmintic medication. the main components of zataria multiflora are phenolic compounds such as thymol and carvacrol. the aim of this study was developed a simple and rapid method for determination of the thymol in different extracts of zataria multiflora by hplc method. the dried aerial parts...