scholarly journals Electronic transitions and ESIPT kinetics of the thienyl-3-hydroxychromone nucleobase surrogate in DNA duplexes: a DFT/MD-TDDFT study

RSC Advances ◽  
2020 ◽  
Vol 10 (13) ◽  
pp. 7349-7359 ◽  
Author(s):  
Alain Sougnabé ◽  
Daniel Lissouck ◽  
Fabien Fontaine-Vive ◽  
Mama Nsangou ◽  
Yves Mély ◽  
...  
Keyword(s):  
Base Composition ◽  
Electronic Transitions ◽  
Dna Duplexes ◽  
Abasic Site ◽  
Environment Changes ◽  
Highly Sensitive ◽  
Kinetics Of

The fluorescent nucleobase surrogate M (2-thienyl-3-hydroxychromone fluorophore) when imbedded in DNA opposite an abasic site exhibits a two colour response highly sensitive to environment changes and base composition.

scholarly journals Gelatin Beads/Hemp Hurd as pH Sensitive Devices for Delivery of Eugenol as Green Pesticide

2021 ◽  
Author(s):  
Gianluca Viscusi ◽  
Giuliana Gorrasi
Keyword(s):  
Release Kinetics ◽  
Barrier Properties ◽  
Ph Sensitive ◽  
Release Behavior ◽  
Sorption Coefficient ◽  
Highly Sensitive ◽  
Mean Diameter ◽  
Ph Conditions ◽  
Kinetics Of ◽  
Hemp Hurd

AbstractIn this paper gelatin beads reinforced with natural hemp hurd have been produced as pH sensitive devices for the release of eugenol, as green pesticide. The composites beads, with a mean diameter of about 1 mm, were obtained by polymer droplet gelation in sunflower oil. Thermal properties were evaluated showing no noticeable difference after the introduction of hemp hurd. Barrier properties demonstrated an improvement of hydrophobization. The introduction of 5% w/w of hemp hurd led to a reduction of sorption coefficient of about 85% compared to unloaded gelatin beads. Besides, the diffusion coefficient decreased, introducing 5% w/w of hemp hurd, from 8.91 × 10−7 to 0.77 × 10−7 cm2/s. Swelling and dissolution phenomena of gelatin beads were studied as function of pH. The swelling of gelatin beads raised as pH increased up to 2.3 g/g, 9.1 g/g and 27.33 g/g at pH 3, 7 and 12, respectively. The dissolution rate changed from 0.034 at pH 3 to 0.077 h−1 at pH 12. Release kinetics of eugenol at different pH conditions were studied. The released eugenol after 24 h is 98%, 91%, 81 and 63% w/w (pH 3), 87%, 62%, 37 and 32 wt% (pH 7) and 81%, 68%, 60 and 52 wt% (pH 12) for unloaded gelatin beads and gelatin beads with 1%, 3 and 5% of hemp hurd, respectively. The eugenol release behavior was demonstrated to be highly sensitive to the pH release medium, which allows to tune such devices as green pesticide release systems in soils with different level of acidity/basicity.

scholarly journals Investigation of the Kinetics of Photoinduced Electronic Transitions in Nanostructures of Bacterial Reaction Centers

2016 ◽  
Vol 61 (10) ◽  
pp. 923-931
Author(s):  
Y.M. Barabash ◽  
◽  
M.A. Drapikovskyi ◽  
M.A. Zabolotny ◽  
M.P. Kulish ◽  
...  
Keyword(s):  
Reaction Centers ◽  
Electronic Transitions ◽  
Bacterial Reaction Centers ◽  
Kinetics Of

Kinetics of highly sensitive troponin I and T after eccentric exercise

2010 ◽  
Vol 48 (11) ◽  
Author(s):  
Giuseppe Lippi ◽  
Franco Impellizzeri ◽  
Gian Luca Salvagno ◽  
Monica Mion ◽  
Martina Zaninotto ◽  
...  
Keyword(s):  
Eccentric Exercise ◽  
Troponin I ◽  
Highly Sensitive ◽  
Highly Sensitive Troponin ◽  
Kinetics Of

The effect of LNA nucleobases as enhancers for the binding of amiloride to an abasic site in DNA/DNA and DNA/RNA duplexes

2014 ◽  
Vol 12 (37) ◽  
pp. 7250-7256 ◽  
Author(s):  
Yusuke Sato ◽  
Tetsushi Sato ◽  
Takaya Sato ◽  
Seiichi Nishizawa ◽  
Norio Teramae
Keyword(s):  
Nucleic Acid ◽  
Locked Nucleic Acid ◽  
Dna Duplexes ◽  
Abasic Site ◽  
Rna Duplexes

We report on a significant effect of locked nucleic acid (LNA) nucleobases on the binding of amiloride for abasic site (AP)-containing DNA duplexes.

Abasic site-binding ligands conjugated with cyanine dyes for “off–on” fluorescence sensing of orphan nucleobases in DNA duplexes and DNA–RNA hybrids

2014 ◽  
Vol 50 (5) ◽  
pp. 515-517 ◽  
Author(s):  
Yusuke Sato ◽  
Megumi Kudo ◽  
Yu Toriyabe ◽  
Shota Kuchitsu ◽  
Chun-xia Wang ◽  
...  
Keyword(s):  
Cyanine Dyes ◽  
Dna Duplexes ◽  
Abasic Site ◽  
Fluorescence Sensing ◽  
Site Binding

Mathematical modeling of the kinetics of a highly sensitive enzyme biosensor

2018 ◽  
Vol 126 (1) ◽  
pp. 49-59
Author(s):  
Elbahi Djaalab ◽  
Mohamed El Hadi. Samar ◽  
Saida Zougar
Keyword(s):  
Mathematical Modeling ◽  
Highly Sensitive ◽  
Enzyme Biosensor ◽  
Kinetics Of

Highly sensitive in situ monitoring of catalytic reactions by surface enhancement Raman spectroscopy on multifunctional Fe3O4/C/Au NPs

Nanoscale ◽  
2014 ◽  
Vol 6 (14) ◽  
pp. 7954-7958 ◽  
Author(s):  
Wenya Cai ◽  
Xianghu Tang ◽  
Bai Sun ◽  
Liangbao Yang
Keyword(s):  
Magnetic Field ◽  
Raman Spectroscopy ◽  
Catalytic Reaction ◽  
Catalytic Reactions ◽  
In Situ Monitoring ◽  
Au Nps ◽  
Highly Sensitive ◽  
Kinetics Of ◽  
The Magnetic Field

In situ monitoring and characterizing kinetics of catalytic reaction with SERS on multifunctional Fe3O4/C/Au NPs in the magnetic field.

Kinetics of Iterative Carbohydrate Transfer to Polysaccharide Catalyzed by Chondroitin Polymerase on a Highly Sensitive Flow-Type 27 MHz Quartz-Crystal Microbalance

2012 ◽  
Vol 18 (24) ◽  
pp. 7388-7393 ◽  
Author(s):  
Toshiaki Mori ◽  
Takayuki Kodera ◽  
Hiroshi Yoshimine ◽  
Yoshimitsu Kakuta ◽  
Nobuo Sugiura ◽  
...  
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Flow Type ◽  
Highly Sensitive ◽  
Kinetics Of

Metabolism of high molecular weight, polydisperse, rapidly labeled nuclear RNA in rat liver

1968 ◽  
Vol 46 (12) ◽  
pp. 1497-1505 ◽  
Author(s):  
Maurice Brossard ◽  
Louis Nicole
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Rat Liver ◽  
Ribosomal Rna ◽  
Base Composition ◽  
Orotic Acid ◽  
Chromosomal Origin ◽  
Base Analysis ◽  
Nuclear Rna ◽  
Kinetics Of

Studies of the metabolism of rat liver RNA showed the existence of two species of rapidly labeled nuclear RNA: a 45 S preribosomal type of nucleolar origin, and a 6–50 S polydisperse RNA of chromosomal origin. The kinetics of labeling with orotic acid-14C and the nature of the latter RNA have been investigated. The following findings are reported, (1) This RNA is composed of at least four main classes of RNA having sedimentation coefficients of approximately 45, 35, 24, and 18 S. (2) Except for the 18 S class which seems to be an end product, the three other classes have a rapid turnover and do not appear to leave the nucleus. (3) Base analysis after 32P incorporation indicates that these four classes of RNA have a similar base composition with a G+C/A + U ratio in the range of 0.98–1.07, which resembles DNA more closely than ribosomal RNA. (4) The 6–50 S polydisperse RNA has a different metabolism than that of the 45 S preribosomal type and there is no precursor-to-product relationship between these two species of RNA.

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