Results 11 to 20 of about 42,123 (288)

Straightforward Immobilization of Phosphonic Acids and Phosphoric Acid Esters on Mesoporous Silica and Their Application in an Asymmetric Aldol Reaction

Nanomaterials, 2019
The combined benefits of moisture-stable phosphonic acids and mesoporous silica materials (SBA-15 and MCM-41) as large-surface-area solid supports offer new opportunities for several applications, such as catalysis or drug delivery.
Christian Weinberger, Tatjana Heckel, Patrick Schnippering, Markus Schmitz, Anpeng Guo, Waldemar Keil, Heinrich C. Marsmann, Claudia Schmidt, Michael Tiemann, René Wilhelm   +9 more
doaj   +2 more sources

Zr-Based Metal-Organic Frameworks with Phosphoric Acids for the Photo-Oxidation of Sulfides. [PDF]

Int J Mol Sci, 2022
Heterogeneous Brønsted acidic catalysts such as phosphoric acids are the conventional activators for organic transformations. However, the photocatalytic performance of these catalysts is still rarely explored. Herein, a novel Zr-based metal−
Zhao Z, Liu M, Zhou K, Gong H, Shen Y, Bao Z, Yang Q, Ren Q, Zhang Z.   +8 more
europepmc   +2 more sources

The Effect of Different Acid Treatments on Shear Bond Strength Between Monolithic Zirconia and Dentin Surface

Cumhuriyet Dental Journal, 2021
Objective: The aim of this study is to evaluate the effect of dentin surface treatments with citric, tartaric, phosphoric, and boric acids on the bonding strength of monolithic zirconia.
Oguzhan Gorler, Melih Ulgey
doaj   +1 more source

THE PHOSPHORIC ACID IN STARCH. [PDF]

Journal of the American Chemical Society, 1916
n ...
Northrop, John H., Nelson, J. M.
openaire   +2 more sources

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

Molecules, 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, Ru-Si Wen, Xiao-Rui Huang, Rong-Xiu Qin, Yi-Ming Hu, Yong-Hong Zhou   +5 more
doaj   +1 more source

THE DETERMINATION OF PHOSPHORIC ACID. [PDF]

Journal of the American Chemical Society, 1895
n ...
openaire   +2 more sources

XLVIII.—The phosphoric acids [PDF]

J. Chem. Soc., Trans., 1911
n ...
Holt, Alfred, Myers, James Eckersley
openaire   +2 more sources

Influence of exposure to phosphoric and polyacrylic acids on selected microscopic and physical/chemical properties of calcium hydroxide cements

European Oral Research, 2020
Purpose This study aimed to evaluate if the contact of calcium hydroxide cements with polyacrylic and phosphoric acids would alter selected microscopic and physical and chemical properties.
Isabela Dantas Torres De Araújo, Renato Barbosa Soares, Camila Pessoa Lopes, Isana Álvares Ferreira, Boniek Castillo Dutra Borges   +4 more
doaj   +1 more source

Comparison of Shear Bond Strength, Adhesive Remnant Index and Enamel Cracks in Bonding and Rebonding of Stainless Steel Brackets to Enamel Surface Conditioned with Er:YAG Laser Versus Conventional Acid Etching

Frontiers in Dentistry, 2021
Objectives: The aim of the present study was to compare shear bond strength (SBS), adhesive remnant index and enamel cracks in bonding and rebonding of brackets to enamel, conditioned with erbium-doped yttrium aluminium garnet (Er:YAG) laser and ...
Elahe Soltanmohamadi Borujeni, Javad Chalipa, Ardavan Etemadi, Maryam Nasiri, Mohammad Javad Kharrazifard, Mohammad Sadegh Ahmad Akhoundi   +5 more
doaj   +1 more source

Asymmetric cross-dehydrogenative coupling enabled by the design and application of chiral triazole-containing phosphoric acids. [PDF]

J Am Chem Soc, 2013
This report describes the development of an enantioselective C-N bond-forming reaction to produce 1,2,3,4-tetrahydroisoquinoline-derived cyclic aminals catalyzed by chiral phosphate anions.
Neel AJ, Hehn JP, Tripet PF, Toste FD.
europepmc   +2 more sources