Physico-chemical and structural properties of hydrogels formed by chitosan, in the presence and absence of poly(vinylpyrrolidone) and sodium decylsulfate

2007 ◽  
Vol 9 (46) ◽  
pp. 6150 ◽  
Author(s):  
Gaetano Mangiapia ◽  
Henrich Frielinghaus ◽  
Gerardino D’Errico ◽  
Ornella Ortona ◽  
Roberto Sartorio ◽  
...  
Keyword(s):  
Structural Properties ◽  
Physico Chemical ◽  
Sodium Decylsulfate ◽  
Presence And Absence

scholarly journals Rouse model with transient intramolecular contacts on a timescale of seconds recapitulates folding and fluctuation of yeast chromosomes

2019 ◽  
Vol 47 (12) ◽  
pp. 6195-6207 ◽  
Author(s):  
Marius Socol ◽  
Renjie Wang ◽  
Daniel Jost ◽  
Pascal Carrivain ◽  
Cédric Vaillant ◽  
...  
Keyword(s):  
Structural Properties ◽  
Single Particle Tracking ◽  
Chemical Parameters ◽  
Chromosome Conformation ◽  
Formation Reaction ◽  
Rouse Model ◽  
Physico Chemical ◽  
Capture Techniques

Abstract DNA folding and dynamics along with major nuclear functions are determined by chromosome structural properties, which remain, thus far, elusive in vivo. Here, we combine polymer modeling and single particle tracking experiments to determine the physico-chemical parameters of chromatin in vitro and in living yeast. We find that the motion of reconstituted chromatin fibers can be recapitulated by the Rouse model using mechanical parameters of nucleosome arrays deduced from structural simulations. Conversely, we report that the Rouse model shows some inconsistencies to analyze the motion and structural properties inferred from yeast chromosomes determined with chromosome conformation capture techniques (specifically, Hi-C). We hence introduce the Rouse model with Transient Internal Contacts (RouseTIC), in which random association and dissociation occurs along the chromosome contour. The parametrization of this model by fitting motion and Hi-C data allows us to measure the kinetic parameters of the contact formation reaction. Chromosome contacts appear to be transient; associated to a lifetime of seconds and characterized by an attractive energy of –0.3 to –0.5 kBT. We suggest attributing this energy to the occurrence of histone tail-DNA contacts and notice that its amplitude sets chromosomes in ‘theta’ conditions, in which they are poised for compartmentalization and phase separation.

Effects of high hydrostatic pressure on physico-chemical and structural properties of two pumpkin species

2019 ◽  
Vol 274 ◽  
pp. 281-290 ◽  
Author(s):  
Maria Paciulli ◽  
Massimiliano Rinaldi ◽  
Margherita Rodolfi ◽  
Tommaso Ganino ◽  
Michele Morbarigazzi ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Structural Properties ◽  
High Hydrostatic Pressure ◽  
Physico Chemical

Physico-chemical, rheological and structural properties of fractionated potato starches

2007 ◽  
Vol 82 (3) ◽  
pp. 383-394 ◽  
Author(s):  
Lovedeep Kaur ◽  
Jaspreet Singh ◽  
Owen J. McCarthy ◽  
Harmit Singh
Keyword(s):  
Structural Properties ◽  
Physico Chemical ◽  
Potato Starches

Physico-chemical, functional and structural properties of RS3/RS4 from kidney bean (Phaseolus vulgaris) cultivars

2016 ◽  
Vol 87 ◽  
pp. 514-521 ◽  
Author(s):  
Adil Gani ◽  
Amreen Jan ◽  
Asima Shah ◽  
F.A. Masoodi ◽  
Mudasir Ahmad ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Structural Properties ◽  
Kidney Bean ◽  
Physico Chemical

Chemical and Structural Properties of Jordanian Diatomaceous Clay Supported Metal Oxides

2004 ◽  
Vol 7 (2) ◽  
Author(s):  
Amjad H. El-Sheikh ◽  
Maha F. Tutunji ◽  
Ghazi A. W. Derwish ◽  
Salem M. Musleh
Keyword(s):  
Hydrogen Peroxide ◽  
Metal Oxides ◽  
Surface Area ◽  
Structural Properties ◽  
Structural Changes ◽  
Phenol Solution ◽  
Supported Metal Oxides ◽  
Presence And Absence ◽  
Titanium Vanadium ◽  
Supported Metal

AbstractMetal oxides of titanium, vanadium, manganese and iron were deposited on the native Jordanian diatomaceous clay. The chemical and structural properties of the prepared samples were investigated using SEM, XRF, ICP, XRD and FTIR techniques. The diatomaceous clay supported metal oxides were used in preliminary experiments to explore their interaction with aqueous phenol solution under thermal and photochemical conditions, in the presence and absence of hydrogen peroxide. The results showed that the metal oxides have interacted with the diatomaceous clay and caused some structural changes. These were reflected in the surface area of the samples and their activity in the phenol reactions.

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