Results 31 to 40 of about 14,001 (199)

Esters of (S)-1,2-propanediol and (R,R)-2,3-butanediol — Chiral Compounds Inducing Cholesteric Phases with a Helix Inversion · [PDF]

open access: yes, 1987
Mesogenic chiral esters of optically active (S)-1,2-propanediol and (R,R)-2,3-butanediol were synthesized. The compounds, added to a nematic phase induce cholesteric phases exhibiting a helix inversion with temperature variation.
Heppke, G.   +2 more
core   +1 more source

Determination of 1,2-propanediol in milk by gas chromatography-mass spectrometry [PDF]

open access: yesZhongguo niangzao
A method for the detection of 1,2-propanediol in milk by gas chromatography-mass spectrometry (GC-MS) was established by optimizing pretreatment and chromatographic conditions.
GAO Yujie, ZHANG Lijia, LI Peizhen, WU Xiaoli, MO Nan, BAI Yanmei, WANG Yang, LIU Lijun
doaj   +1 more source

Insights on the Extraction Performance of Alkanediols and Glycerol: Using Juglans regia L. Leaves as a Source of Bioactive Compounds

open access: yesMolecules, 2020
Glycerol and alkanediols are being studied as alternative solvents to extract phytochemicals from plant material, often as hydrogen bond donors in deep eutectic solvents (DESs).
Vanessa Vieira   +5 more
doaj   +1 more source

Exploring Lactobacillus reuteri DSM20016 as a biocatalyst for transformation of longer chain 1,2-diols: Limits with microcompartment. [PDF]

open access: yesPLoS ONE, 2017
Lactobacillus reuteri metabolises glycerol efficiently to form 3-hydroxypropionic acid (3-HP) and 1,3-propanediol (1,3PDO) by the same mechanism as that for 1,2-propanediol (1,2PDO) conversion to propionic acid and propanol via its propanediol ...
Lu Chen, Rajni Hatti-Kaul
doaj   +1 more source

Hydrogenolysis of glycerol to monoalcohols over supported Mo and W Catalysts [PDF]

open access: yes, 2016
MoO3 and WO3 were supported on γ-Al2O3 and SiO2 with nominal loadings of 10 wt % via wet impregnation. The catalysts were characterized using XRD, TPR, Pulse TPD, Raman, TEM, and BET surface area.
Dasireddy, Venkata D. B. C.   +5 more
core   +3 more sources

Depolymerization and Reuse of Polycarbonates: Emerging Classes, Mechanisms and Challenges

open access: yesAngewandte Chemie, EarlyView.
This review collects the latest developments in the area of chemical and catalytic polycarbonate recycling strategies and includes the controlled degradation of similar types of macromolecules. Apart from the main strategies for deconstruction, the key mechanistic features of these depolymerization processes are also discussed together with the ...
Davide Rigo   +4 more
wiley   +2 more sources

Dissimilation of 1,2-propanediol by rumen micro-organisms [PDF]

open access: yesBritish Journal of Nutrition, 1973
1. The main products of fermentation of 1,2-propanediol weren-propanol and propionic acid, but variable amounts of acetic acid and carbon dioxide were also formed. The concentrations of an intermediate propionaldehyde increased and then decreased.2. A tentative scheme is suggested, showing that 1,2-propanediol is first dehydrated to propionaldehyde ...
J W, Czerkawski, G, Breckenridge
openaire   +2 more sources

Semi-pilot scale-up of a continuous packed-bed bioreactor system developed for the lipase-catalyzed production of pseudo-ceramides

open access: yesOilseeds and fats, crops and lipids, 2017
Ceramides are sphingolipid compounds that are very attractive as active components in both the pharmaceutical and the cosmetic industries. In this study, the synthesis of 1-O,3-N-diacyl 3-amino-1,2-propanediol-type pseudo-ceramides was developed at the ...
Le Joubioux Florian   +3 more
doaj   +1 more source

Spectrophotometric determination of lipases, lysophospholipases, and phospholipases

open access: yesJournal of Lipid Research, 1984
Spectrophotometric techniques for determining the activities of lipases, lysophospholipases, and phospholipases are reviewed. These methods involve the use of thioester substrate analogs as well as omega-nitrophenyl derivatives of the corresponding ...
A A Farooqui   +4 more
doaj   +1 more source

Synthesis of empty bacterial microcompartments, directed organelle protein incorporation, and evidence of filament-associated organelle movement [PDF]

open access: yes, 2010
Compartmentalization is an important process, since it allows the segregation of metabolic activities and, in the era of synthetic biology, represents an important tool by which defined microenvironments can be created for specific metabolic functions ...
Bhella, D.   +6 more
core   +2 more sources

Home - About - Disclaimer - Privacy