Results 31 to 40 of about 933,084 (308)

Bile acids. LXVII. The major bile acids of Varanus monitor

open access: yesJournal of Lipid Research, 1982
The major bile acids of gall bladder bile of Varanus monitor have been separated by thin-layer chromatography and shown to be derivatives of taurine.
S S Ali, E Stephenson, W H Elliott
doaj   +1 more source

Similarity of unusual bile acids in human umbilical cord blood and amniotic fluid from newborns and in sera and urine from adult patients with cholestatic liver diseases

open access: yesJournal of Lipid Research, 1988
Unusual bile acids in umbilical cord blood and amniotic fluid of term newborns and in sera and urine from adult patients with cholestatic liver diseases were analyzed by use of gas-liquid chromatography-mass spectrometry.
J Shoda   +7 more
doaj   +1 more source

Development of chiral phosphoric acids based on ferrocene-bridged paracyclophane frameworks [PDF]

open access: yes, 2013
International audienceThis work deals with the development of a new family of planar chiral phosphoric acids, based on a ferrocenophane/paracyclophane scaffold.
Betzer, Jean-François   +7 more
core   +6 more sources

Biliary bile acids, bile alcohols, and sterols of Alligator mississippiensis.

open access: yesJournal of Lipid Research, 1980
Bile from Alligator mississippiensis was found to contain a mixture of more than twenty bile acids, bile alcohols, and neutral sterols. Bile acids and bile alcohols were purified by reversed-phase high performance liquid chromatography and thin-layer ...
G S Tint   +6 more
doaj   +1 more source

Simple and stereospecific homologation of urethane-protected alpha-amino acids to their higher homologs using HBTU1 [PDF]

open access: yes, 2003
A simple, efficient and stereospecific approach for the homologation of urethane-protected a-amino acids to beta-amino acids by the Arndt-Eistert method employing Fmoc-/Boc-alpha-amino acid and 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyl-uronium ...
Sureshbabu, V.V., Vasanthakumar, G.R.
core   +1 more source

Chemical Conversion of Cyclic .ALPHA.-Amino Acids to Cyclic .ALPHA.-Aminophosphonic Acids.

open access: yesChemical and Pharmaceutical Bulletin, 2001
The oxidative decarboxylation of cyclic alpha-amino acids having urethane-type N-protecting groups with lead tetraacetate [Pb(OAc)4] gave 2-hydroxy derivatives, which were transformed into the corresponding alpha-aminophosphonic acid esters by treatment of trialkyl phosphites in the presence of Lewis acids.
M, Kaname, H, Mashige, S, Yoshifuji
openaire   +3 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Synthesis of 24-nor-5 beta-cholan-23-oic acid derivatives: a convenient and efficient one-carbon degradation of the side chain of natural bile acids

open access: yesJournal of Lipid Research, 1988
An efficient procedure for obtaining nor-bile acids from natural (C24) bile acids is described. Treatment of formylated bile acids with sodium nitrite in a mixture of trifluoroacetic anhydride with trifluoroacetic acid gives, through a ''second order ...
C D Schteingart, A F Hofmann
doaj   +1 more source

Synthesis of Terpineol from Alpha-Pinene Catalyzed by α-Hydroxy Acids

open access: yesMolecules, 2022
We report the use of five alpha-hydroxy acids (citric, tartaric, mandelic, lactic and glycolic acids) as catalysts in the synthesis of terpineol from alpha-pinene.
Zhong-Lei Meng   +5 more
doaj   +1 more source

The cytotoxicity of fatty acid/α-lactalbumin complexes depends on the amount and type of fatty acid [PDF]

open access: yes, 2013
peer-reviewedComplexes of the milk protein, α-lactalbumin, and the fatty acid, oleic acid, have previously been shown to be cytotoxic. Complexes of α-lactalbumin and five different fatty acids (vaccenic, linoleic, palmitoleic, stearic, and elaidic acid ...
Aits   +35 more
core   +1 more source

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