scholarly journals Preparation and characterization of gamma oryzanol loaded zein nanoparticles and its improved stability

2020 ◽  
Author(s):  
Ubonphan Rodsuwan ◽  
Usaraphan Pithanthanakul ◽  
Krittiya Thisayakorn ◽  
Dudsadee Uttapap ◽  
Korawinvich Boonpisuttinant ◽  
...  
Keyword(s):  
Improved Stability ◽  
Gamma Oryzanol

A p-Type PbS Quantum Dot Ink with Improved Stability for Solution Processable Optoelectronics

2021 ◽  
Author(s):  
Fiaz Ahmed ◽  
John Hardin Dunlap ◽  
Perry J. Pellechia ◽  
Andrew Greytak
Keyword(s):  
Quantum Dot ◽  
Ligand Exchange ◽  
Chemical Characterization ◽  
Single Step ◽  
Improved Stability ◽  
Solution Processable ◽  
P Type ◽  
Pbs Quantum Dot

A highly stable p-type PbS-QDs ink is prepared using a single-step biphasic ligand exchange route, overcoming instability encountered in previous reports. Chemical characterization of the ink reveals 3-mercaptopriopionic acid (MPA)...

Characterization of an Improved dc Plasma Excitation Source

1980 ◽  
Vol 34 (1) ◽  
pp. 24-30 ◽  
Author(s):  
G. N. Coleman ◽  
W. P. Braun ◽  
A. M. Allen
Keyword(s):  
Thermal Conductivity ◽  
Direct Current ◽  
Direct Evidence ◽  
Plasma Jet ◽  
Sample Introduction ◽  
Direct Current Plasma ◽  
Actual Mechanism ◽  
Improved Stability ◽  
Plasma Excitation

Several modifications of the direct current plasma jet have resulted in significantly enhanced analysis capabilities. Reducing the electrode angle, decreasing the aerosol chimney size, and operating in a diffuse mode with helium have provided improved stability, sensitivity, freedom from interferences, and detection limits. While the actual mechanism of the helium enhancement is not clear, no direct evidence was found which supports participation in the excitation step. Rather, improved desolvation, vaporization and possibly sample introduction result from the thermal conductivity of helium being much greater than that of argon.

Design and characterization of a fusion glycoprotein vaccine for Respiratory Syncytial Virus with improved stability

Vaccine ◽  
2018 ◽  
Vol 36 (52) ◽  
pp. 8119-8130 ◽  
Author(s):  
Lan Zhang ◽  
Eberhard Durr ◽  
Jennifer D. Galli ◽  
Scott Cosmi ◽  
Pedro J. Cejas ◽  
...  
Keyword(s):  
Respiratory Syncytial Virus ◽  
Fusion Glycoprotein ◽  
Improved Stability ◽  
Syncytial Virus

Properties of a-Si:H and a-SiGe:H Films Deposited by Photo-Assisted CVD

1986 ◽  
Vol 70 ◽  
Author(s):  
R. E. Rocheleau ◽  
S. C. Jackson. ◽  
S. S. Hegedus ◽  
B. N. Baron
Keyword(s):  
High Efficiency ◽  
Chemical Vapor ◽  
Photovoltaic Cell ◽  
Gas Flows ◽  
Long Term Stability ◽  
Improved Stability ◽  
Deposition Processes ◽  
P Type

ABSTRACTChemical vapor deposition techniques, in particular plasma enhanced CVD, have been used to produce high quality a-Si:H materials. Continuing research is directed toward increased device performance, improved stability, and translation of scale to commercial production. A part of this effort is the evaluation of alternate CVD techniques which in addition to providing technical options for high efficiency and long term stability are likely to lead to improved understanding of the relationships between deposition processes and material properties. A relatively new technique for depositing a-Si:H is photo-CVD which utilizes ultraviolet light to initiate the decomposition of silane or disilane. The best results from both materials properties and device efficiency points of view have been achieved using mercury sensitized photo-CVD. Recently, a 10.5% efficient a-Si:H p-i-n photovoltaic cell, fabricated by photo-CVD, was reported [1]. A limitation in photo-CVD has been preventing deposition on the UV transparent window. In this paper we describe a new photo-CVD reactor with a moveable UV-transparent Teflon film and secondary gas flows to eliminate window fouling. The deposition and opto-electronic characterization of intrinsic a-Si:H and a-SiGe:H and p-type a-SiC:H are described. Finally, preliminary results of p-i-n solar cells are presented.

Fabrication and characterization of ferritin–chitosan–lutein shell–core nanocomposites and lutein stability and release evaluation in vitro

RSC Advances ◽  
2016 ◽  
Vol 6 (42) ◽  
pp. 35267-35279 ◽  
Author(s):  
Rui Yang ◽  
Yunjing Gao ◽  
Zhongkai Zhou ◽  
Padraig Strappe ◽  
Chris Blanchard
Keyword(s):  
Gastrointestinal Tract ◽  
Prolonged Release ◽  
Core System ◽  
Improved Stability ◽  
Fabrication And Characterization

The nano-sized ferritin and chitosan provide a platform for fabricating shell–core system to encapsulate lutein, exhibiting improved stability and prolonged release of lutein in simulated gastrointestinal tract digestion.

scholarly journals Electrochemical Characterization of the Marine Antioxidant Gadusol

2012 ◽  
Vol 7 (9) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Ernesto Maximiliano Arbeloa ◽  
Cristina Luján Ramírez ◽  
Raúl Ariel Procaccini ◽  
María Sandra Churio
Keyword(s):  
Sodium Dodecyl ◽  
Antioxidant Properties ◽  
Homogeneous Medium ◽  
Natural Antioxidants ◽  
Direct Analysis ◽  
Antioxidant Additive ◽  
Electron Transfer Mechanism ◽  
Improved Stability ◽  
Cetyl Trimethyl Ammonium

The electrochemical properties of gadusol, a metabolite extracted from fish roes, were determined for the first time by cyclic- and square-wave voltammetries on a glassy carbon electrode in buffered aqueous solutions. The aims of the work were characterization of the redox behavior and assessment of the mechanism underlying the antioxidant capacity of the compound. Anodic waves with peak potentials of 710 ± 5 mV and 601 ± 9 mV vs. Ag/AgCl were obtained for gadusol and its anion gadusolate, respectively. The voltammograms point to the irreversible nature of the oxidation process and reveal better antioxidant properties for the compound under physiological pH, with a moderate reductive power, but improved stability under atmospheric oxidation in comparison with other natural antioxidants such as ascorbic acid. The presence of direct ionic micelles prepared with sodium dodecyl-sulfate or cetyl-trimethyl-ammonium chloride yielded no significant differences regarding homogeneous medium in the cyclic voltammetry of gadusolate. The results provide evidence of the electron transfer mechanism for the quenching reaction of standard-reactive species by gadusolate and support it as a promising candidate to be tested as an antioxidant additive to food, cosmetic and pharmaceutical formulas. The direct analysis of the metabolite in biological systems and natural extracts by electrochemical methods is also envisaged.

Preparation and characterization of multipoint yeast D-amino acid oxidase mutants with improved stability and activity

2017 ◽  
Vol 72 (5) ◽  
pp. 218-223 ◽  
Author(s):  
D. L. Atroshenko ◽  
S. A. Zarubina ◽  
M. D. Shelomov ◽  
I. V. Golubev ◽  
S. S. Savin ◽  
...  
Keyword(s):  
Amino Acid ◽  
Acid Oxidase ◽  
Amino Acid Oxidase ◽  
Improved Stability
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