AbstractThree strains of Pseudomonas (P.) bacteria were screened for their capabilities of degrading chemically synthesized saturated branched‐chain fatty acids (sbc–FA). Mixtures of sbc–FA with the methyl‐branch located at various locales along the fatty acid were used as a carbon feedstock in shake‐flask culture. Utilization (and hence degradability) of the sbc–FA was monitored based on positive bacterial growth, fatty acid recovery rates and chromatographic (gas chromatography (GC) and GC‐mass spectroscopy (MS)) analysis of the recovered carbon source. P. putida KT2442 and P. oleovorans NRRL B‐14683 were both able to grow on sbc–FA utilizing 35 wt% and 27 wt% of the carbon source, respectively after 144 h. In contrast, P. resinovorans NRRL B‐2649 exhibited the most efficient use of the carbon source by utilizing 89 % of the starting material after 96 h resulting in a cell dry weight (CDW) of 3.1 g/L. GC and GC–MS analysis of the recovered carbon source revealed that the bacterial strains selectively utilized the isostearic acid in the sbc–FA mixture, and a new group of C10, C12, C14 and C16‐linear and/or branched‐chain fatty acids (approximately 4–29 wt%) were formed during degradation.
Process for preparing amide gellant compounds with aromatic end groups
申请人:Chopra Naveen
公开号:US08581000B2
公开(公告)日:2013-11-12
Disclosed is a process for preparing a compound of the formula
wherein R1 and R1′, R2 and R2′, and R3 are as defined herein, said process comprising (I) reacting a diacid of the formula HOOC—R2—COOH with a diamine of the formula H2N—R3—NH2 to form an acid-terminated oligoamide intermediate of the formula HOOC—R2—CONH—R3—HNCO—R2′—COOH; and (II) reacting the acid-terminated oligoamide intermediate with a monoalcohol of the formula R1—OH in the presence of a tin or organic titanate catalyst, in the absence of a coupling agent, and in the absence of a solvent to form the product. Also disclosed is a composition prepared by the process.
Organic Phase Change Carriers Containing Nanoparticles, Phase Change Inks Including Same and Methods for Making Same
申请人:Breton Marcel P.
公开号:US20070283846A1
公开(公告)日:2007-12-13
Disclosed is an organic phase change carrier and a method for forming same, and a phase change ink including same. The organic phase change carrier comprises a colloidal dispersion of nanoparticles exhibiting a substantially uniform distribution of said nanoparticles discretely distributed therewithin, at least one curable monomer; a phase change inducing component, and an initiator. The organic phase change carrier exhibits a substantially uniform distribution of the nanoparticles so that they are discretely distributed therewithin, and are substantially resistant to the aggregation of the nanoparticles distributed therewithin.
ORGANIC PHASE CHANGE CARRIERS CONTAINING NANOPARTICLES, PHASE CHANGE INKS INCLUDING SAME AND METHODS FOR MAKING SAME
申请人:Breton Marcel P.
公开号:US20100116424A1
公开(公告)日:2010-05-13
Disclosed is an organic phase change carrier and a method for forming same, and a phase change ink including same. The organic phase change carrier comprises a colloidal dispersion of nanoparticles exhibiting a substantially uniform distribution of said nanoparticles discretely distributed therewithin, at least one curable monomer; a phase change inducing component, and an initiator. The organic phase change carrier exhibits a substantially uniform distribution of the nanoparticles so that they are discretely distributed therewithin, and are substantially resistant to the aggregation of the nanoparticles distributed therewithin.
A curable phase change gellant ink composition including a phase change ink vehicle comprising at least one acrylate monomer, oligomer, or prepolymer; acryloylmorpholine; at least one gellant, wherein the gellant is miscible with the phase change ink vehicle; a photoinitiator; and an optional colorant.