نتایج جستجو برای: toluenesulfonic acid ptsa

تعداد نتایج: 747488  

2004
William S.-Y. Wang Gang Peng

Tone is an essential component for word formation in all tone languages. Substantial work has been done on using tone information to improve speech recognition of tone languages. In this paper, a new method, called Parallel Tone Score Association (PTSA), for effectively and efficiently using tone in speech recognition is proposed. Experimental results show that the relative character error rate...

Journal: :Structural Chemistry 2023

Single crystals of 8-hydroxy-5-nitroquinolinium p-toluene sulfonate (HNT) were grown by the slow evaporation solution growth technique. The structure was elucidated single-crystal X-ray diffraction analysis, and crystal belongs to monoclinic system with space group C2/c. crystallinity HNT studied powder analysis. presence functional groups determined FT-IR spectral band gap energy is estimated ...

Journal: :Journal of the American Chemical Society 2006
Young K Chen Masanori Yoshida David W C MacMillan

The first enantioselective organocatalytic amine conjugate addition has been successfully developed. The application of LUMO-lowering iminium catalysis has enabled the highly chemo- and enantioselective 1,4-addition of a rationally designed N-silyloxycarbamate nucleophile (HOMO-raised) to alpha,beta-unsaturated aldehydes. Imidazolidinone 2*pTSA was found to catalyze the addition of various orth...

Journal: :Journal of Applied Polymer Science 2021

Polyvinyl alcohol (PVA) is a hydrophilic polymer well known for good film forming properties, high water vapor permeance JW, and low nitrogen permeance. However, depending on molar mass temperature, PVA swells strongly in until complete dissolution. This behavior affects the usability of aqueous environments makes cross-linking necessary if higher structural integrity envisaged. In this work, n...

Journal: :SIMADA (Jurnal Sistem Informasi & Manajemen Basis Data) 2018

Journal: :Applied Catalysis A-general 2023

A number of SO3H-functionalized solids (biochar, montmorillonites, carbon and halloysite nanotubes) has been studied as catalysts in the cascade Prins-Ritter reaction (-)-isopulegol with benzaldehyde acetonitrile for synthesis octahydro-2H-chromene amides (as 4R- 4S-isomers). high selectivity to these products at 30 °C presence H2O was observed on modified chlorosulfonic acid (CSA) reaching 84%...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید