Results 21 to 30 of about 15,336 (235)

Novel Fmoc-Polyamino Acids for Solid-Phase Synthesis of Defined Polyamidoamines [PDF]

open access: yes, 2011
A versatile solid-phase approach to sequence-defined polyamidoamines was developed. Four different Fmoc-polyamino acid building blocks were synthesized by selective protection of symmetrical oligoethylenimine precursors followed by introduction of a ...
Badgujar, Naresh   +2 more
core   +1 more source

Copper Complexes of Nicotinic-Aromatic Carboxylic Acids as Superoxide Dismutase Mimetics

open access: yesMolecules, 2008
Nicotinic acid (also known as vitamin B3) is a dietary element essential for physiological and antihyperlipidemic functions. This study reports the synthesis of novel mixed ligand complexes of copper with nicotinic and other select carboxylic acids ...
Virapong Prachayasittikul   +5 more
doaj   +1 more source

Effects of Preferential Incorporation of Carboxylic Acids on the Crystal Growth and Physicochemical Properties of Aragonite

open access: yesCrystals, 2020
The preferential incorporation of carboxylic acids into aragonite and its effects on the crystal growth and physicochemical properties of aragonite were systematically investigated using a seeded co-precipitation system with different carboxylic acids ...
Seon Yong Lee   +3 more
doaj   +1 more source

Effects of mutations in the helix G region of horseradish peroxidase [PDF]

open access: yes, 2008
Horseradish peroxidase (HRP) has long attracted intense research interest and is used in many biotechnological fields, including diagnostics, biosensors and biocatalysis.
Barry J. Ryan   +59 more
core   +1 more source

Characteristics of the root exudate release system of typical plants in plateau lakeside wetland under phosphorus stress conditions

open access: yesOpen Chemistry, 2020
In this study, the root exudates of wetland plants, Pistia stratiotes, black algae, and Cyperus alternifolius, exposed to six phosphorus concentration gradients (0, 0.2, 1, 5, 10, and 20 mg/L) were characterized.
Duan Xu, Zhao Yang-yi, Zhang Jian-cong
doaj   +1 more source

ISOTHERM ADSORPTION STUDY OF THE SOME DICARBOXYLIC ACID BY MANGANESE DIOXIDE [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2014
The adsorption process for Aliphatic and Aromatic dicarboxylic acid on manganese dioxide was studied briefly as a polluted material which produced in nature.
KHALEL I. AL-NIEMI   +2 more
doaj   +1 more source

Origins and composition of fine atmospheric carbonaceous aerosol in the Sierra Nevada Mountains, California [PDF]

open access: yes, 2011
In this paper we report chemically resolved measurements of organic aerosol (OA) and related tracers during the Biosphere Effects on Aerosols and Photochemistry Experiment (BEARPEX) at the Blodgett Forest Research Station, California from 15 August–10 ...
Bench, G.   +16 more
core   +2 more sources

Synthesis and characterization of new phthalimides and succinimides substituted with 1,3,4-oxadiazole ring [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2012
A series of new phthalimides and succinimides connected to 1,3,4-oxadiazole moiety were synthesized via multistep synthesis. The first step involved synthesis of six 5- substituted 2- amino-1,3,4-oxadiazoles by oxidative cyclization of substituted ...
Ahlam Marouf Al-Azzawi   +1 more
doaj   +1 more source

Glycine–phthalic acid (1/1) [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2012
In the title compound, C2H5NO2·C8H6O4, the glycine mol-ecule exists as a zwitterion (2-aza-niumyl-ethano-ate) with a positively charged amino group and a negatively charged carboxyl-ate group. In the crystal, N-H⋯O and O-H⋯O hydrogen bonds link the components into layers parallel to the ab plane.
Balakrishnan, T.   +2 more
openaire   +2 more sources

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