Results 21 to 30 of about 42,123 (288)

Recent advances in the asymmetric phosphoric acid-catalyzed synthesis of axially chiral compounds

Beilstein Journal of Organic Chemistry, 2021
In recent years, the synthesis of axially chiral compounds has received considerable attention due to their extensive application as biologically active compounds in medicinal chemistry and as chiral ligands in asymmetric catalysis.
Alemayehu Gashaw Woldegiorgis, Xufeng Lin   +1 more
doaj   +1 more source

Characterization of Lignin Precipitated From The Soda Black Liquor of Oil Palm Empty Fruit Bunch Fibers by Various Mineral Acids

ASEAN Journal on Science and Technology for Development, 2017
Soda lignin from oil palm empty fruit bunch was directly isolated by various mineral acids i.e. sulfuric acid, hydrochloric acid, phosphoric acid and nitric acid at three levels of concentration (20% v/v, 60%v/v and concentrated).
M.N Mohamad Ibrahim, S.B Chuah, W.D. Wan Rosli   +2 more
doaj   +1 more source

THE DETERMINATION OF PHOSPHORIC ACID. [PDF]

Journal of the American Chemical Society, 1894
n ...
openaire   +1 more source

Chiral phosphoric acid-catalyzed enantioselective phosphinylation of 3,4-dihydroisoquinolines with diarylphosphine oxides

Communications Chemistry, 2023
Catalytic enantioselective phosphinylation of imines with diarylphosphine oxides is a powerful approach to access chiral α-amino diarylphosphine oxides.
Yongbiao Guo, Ning Li, Junchen Li, Xiaojing Bi, Zhenhua Gao, Ya-Nan Duan, Junhua Xiao   +6 more
doaj   +1 more source

Potentiodynamic and Quantum Studies of Some Amino Acids as Corrosion Inhibitors for Copper

International Journal of Electrochemical Science, 2012
A comparative study of different types of amino acids: proline, cysteine, phenyl alanine, alanine, hisitidine and glycine as inhibitors for copper corrosion in 8M phosphoric acid at different temperatures was carried out. Potentiodynamic polarization and
H.H. Abdel Rahman, A.H.E. Moustafa, M.K. Awad   +2 more
doaj   +1 more source

Reducing Iron Oxide Content in Phosphoric Acid Using Polyacrylates and Phosphonic Acids [PDF]

ACS Omega
Gustavo Paiva Ribeiro, Sandra Cristina Dantas, Eloízio Júlio Ribeiro, Carla Eponina Hori   +3 more
doaj   +2 more sources

Hyper-Crosslinked Porous Chiral Phosphoric Acids: Robust Solid Organocatalysts for Asymmetric Dearomatization Reactions

, 2022
Knitting rigid aromatic building blocks using external crosslinkers has been developed into an effective strategy for the synthesis of porous polymers in recent years.
Lei-Ming Zou (12341233), Xian-Yun Huang, Xian-Yun Huang (12341230), Lei-Ming Zou, Tao Tu (456663), Qing Gu (337545), Qingshu Zheng, Shu-Li You (1446211), Qingshu Zheng (1911784), Qing Gu, Tao Tu, Shu-Li You   +11 more
core   +1 more source

Use of acids as additives in sugarcane silage

Revista Colombiana de Ciencias Pecuarias, 2015
Background: sugarcane silage often becomes a problem for the producers due to its high population of yeast and its high content of soluble carbohydrates.
Eric HCB van Cleef, Anibal C Rêgo, René M Patiño, Flavia O Scarpino van Cleef, Jane MB Ezequiel   +4 more
doaj   +1 more source

Inhibitors of lipid phosphatidate receptors: N-palmitoyl-serine and N-palmitoyl-tyrosine phosphoric acids

Journal of Lipid Research, 1996
An improved synthesis of two lipid phosphoric acids, N-palmitoyl-L-serine phosphoric acid (NP-Ser-PA) and N-palmitoyl-L-tyrosine phosphoric acid (NP-Tyr-PA), from the benzyl esters of L-serine and L-tyrosine is described.
R Bittman, B Swords, K Liliom, G Tigyi
doaj   +1 more source

Insights on Molecular Characteristics of Hydrochars by ¹³C-NMR and Off-Line TMAH-GC/MS and Assessment of Their Potential Use as Plant Growth Promoters

Molecules, 2021
Hydrochar is a carbon-based material that can be used as soil amendment. Since the physical-chemical properties of hydrochar are mainly assigned to process parameters, we aimed at evaluating the organic fraction of different hydrochars through 13C-NMR ...
Laís G. Fregolente, João Vitor dos Santos, Giovanni Vinci, Alessandro Piccolo, Altair B. Moreira, Odair P. Ferreira, Márcia C. Bisinoti, Riccardo Spaccini   +7 more
doaj   +1 more source