Results 21 to 30 of about 266,478 (309)

Fluorescently tuned nitrogen-doped carbon dots from carbon source with different content of carboxyl groups

open access: yesAPL Materials, 2015
In this study, fluorescent nitrogen-doped carbon dots (NCDs) were tuned via varying the sources with different number of carboxyl groups. Owing to the interaction between amino and carboxyl, more amino groups conjugate the surface of the NCDs by the ...
Hao Wang   +7 more
doaj   +1 more source

Crystal structure of poly[[[μ4-5-(9H-carbazol-9-yl)isophthalato][μ3-5-(9H-carbazol-9-yl)isophthalato]bis-(di-methyl-formamide)(methanol)dizinc] di-methyl-formamide monosolvate]. [PDF]

open access: yes, 2015
The structure of the polymeric title compound, {[Zn2(C20H11NO4)2(C3H7NO)2(CH3OH)]·C3H7NO} n , comprises carbazolylisophthalate moieties connecting dimetallic tetra-carboxyl-ate zinc secondary building units (SBUs) parallel to [100] and [010], leading to ...
Campana, Charles   +2 more
core   +4 more sources

Clustering-Triggered Emission of Carboxymethylated Nanocellulose

open access: yesFrontiers in Chemistry, 2019
Non-conjugated polymers with luminescence emission property have recently drawn great attention due to their promising applications in different areas. Most traditional organic synthetic non-conjugated polymers required complicated synthesis.
Meng Li   +7 more
doaj   +1 more source

Indometacin loading and in vitro release properties from novel carbopol coated spherical mesoporous silica nanoparticles [PDF]

open access: yes, 2013
Spherical MCM-41 silica nanosized particles were synthesized and post synthesis modified by 3-aminopropyltriethoxysilane (APTES) in order to prepare amino-functionalized carrier.
Agnes Szegedi   +36 more
core   +1 more source

Structure formation in sugar containing pectin gels – Influence of Ca2+ on the gelation of low-methoxylated pectin at acidic pH [PDF]

open access: yes, 2011
A new method for the examination of the pectin gelation process is presented as a complementation of the most common determination of the gelling point (cross-over of G′ and G″) from oscillation measurements.
Einhorn-Stoll, Ulrike   +2 more
core   +1 more source

An acidic-groups detection method and its application to analysis of Chinese humic acid samples.

open access: yesPLoS ONE, 2020
The method of non-aqueous conductivity titration (NACT) of organic weak acids was applied to quickly and accurately determine the phenolic-hydroxyl and carboxyl-groups contents in humic acid.
Pengfei Xu   +7 more
doaj   +1 more source

Hydrogen-bonding interactions in the crystalline-phase structures of cinnamic acid derivatives [PDF]

open access: yes, 1999
Secondary interactions responsible for the crystalline-phase structures of various cinnamic acids and cinnamic acid esters drawn from the Cambridge Structural Database were studied with the help of the Cerius package implemented on an SGI workstation ...
Pálinkó, István
core   +1 more source

Preparation, Characterization of Carboxyl Polyaldehyde Sugars and Application as Innovative Anti-crease Finishing Agents for Cotton Fabric

open access: yesJournal of Natural Fibers, 2022
We have designed and prepared four new cellulose cross-linking agents using NaClO/NaBr/TEMPO and sodium periodate selective catalytic oxidation systems. First, the primary hydroxyl group of sucrose, trehalose, maltose, or lactose was carboxylated through
Jiangfei Lou, Dan Wang, Xuerong Fan
doaj   +1 more source

Functionalized polystyrene nanoparticles as a platform for studying bio–nano interactions

open access: yesBeilstein Journal of Nanotechnology, 2014
Nanoparticles of various shapes, sizes, and materials carrying different surface modifications have numerous technological and biomedical applications.
Cornelia Loos   +6 more
doaj   +1 more source

Dopamine-derived nitrogen-doped carboxyl multiwalled carbon nanotube-modified graphite felt with improved electrochemical activity for vanadium redox flow batteries [PDF]

open access: yesRoyal Society Open Science, 2020
Improving the electrochemical activity of electrodes is essential to the development of vanadium redox flow battery (VRFB). In this work, we prepared a novel electrode with the modification of nitrogen-doped carboxyl multiwalled carbon nanotubes using ...
Qiang Li   +4 more
doaj   +1 more source

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