The impact of various exogenous type starch on the structural properties and dispersion stability of autoclaved lotus seed starch

2021 ◽  
Vol 175 ◽  
pp. 49-57
Author(s):  
Yixin Zheng ◽  
Yujia Ou ◽  
Chong Zhang ◽  
Yi Zhang ◽  
Baodong Zheng ◽  
...  
Keyword(s):  
Structural Properties ◽  
Dispersion Stability ◽  
Lotus Seed ◽  
The Impact

scholarly journals Structural Properties of G,T-Parallel Duplexes

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
Anna Aviñó ◽  
Elena Cubero ◽  
Raimundo Gargallo ◽  
Carlos González ◽  
Modesto Orozco ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Structural Properties ◽  
Theoretical Calculations ◽  
Md Simulations ◽  
Theoretical Studies ◽  
Duplex Structure ◽  
Strong Stabilization ◽  
The Stability ◽  
The Impact

The structure of G,T-parallel-stranded duplexes of DNA carrying similar amounts of adenine and guanine residues is studied by means of molecular dynamics (MD) simulations and UV- and CD spectroscopies. In addition the impact of the substitution of adenine by 8-aminoadenine and guanine by 8-aminoguanine is analyzed. The presence of 8-aminoadenine and 8-aminoguanine stabilizes the parallel duplex structure. Binding of these oligonucleotides to their target polypyrimidine sequences to form the corresponding G,T-parallel triplex was not observed. Instead, when unmodified parallel-stranded duplexes were mixed with their polypyrimidine target, an interstrand Watson-Crick duplex was formed. As predicted by theoretical calculations parallel-stranded duplexes carrying 8-aminopurines did not bind to their target. The preference for the parallel-duplex over the Watson-Crick antiparallel duplex is attributed to the strong stabilization of the parallel duplex produced by the 8-aminopurines. Theoretical studies show that the isomorphism of the triads is crucial for the stability of the parallel triplex.

Molecular Dynamics Studies on the Growth and Structural Properties of Hydrogenated DLC Films

2008 ◽  
Vol 373-374 ◽  
pp. 108-112
Author(s):  
Yu Jun Zhang ◽  
Guang Neng Dong ◽  
Jun Hong Mao ◽  
You Bai Xie
Keyword(s):  
Molecular Dynamics ◽  
Structural Properties ◽  
Impact Energy ◽  
Frictional Coefficient ◽  
Carbon Films ◽  
Dynamics Simulation ◽  
Diamond Surface ◽  
Hydrogen Atoms ◽  
Molecular Configuration ◽  
The Impact

The novel frictional properties of hydrogenated DLC (Diamond-like Carbon) films have been reported for nearly ten years. But up to now, researchers still haven’t known the exact mechanism resulting in the super-low frictional performance of hydrogenated DLC films. Especially they have little knowledge on the molecular configuration and structural properties of these kinds of films. In this paper, CH3 radicals with different impact energies are selected as source species to deposit DLC films on diamond (100) by molecular dynamics simulation. Results show hydrogenated DLC films can be successfully obtained when impact energy is in an appropriate scope that is no less than 20eV. The depositing processes involve impinging diamond surface and bonding procedure. Some atoms, instead of bonding with substrate atoms, fly away from the diamond surface. Only suitable impact energy can improve the growth of the film. Within 30eV to 60eV, the maximum deposition ratio is attained. In addition, when carbon atoms act as the deposition sources, the deposition ratio is relatively higher. Furthermore, the authors find that species with higher concentration of carbon atoms in deposition sources lead to a better deposition rate. Carbon atoms are more reactive than hydrogen atoms. Then the relative densities of DLC films are calculated. The density curves indicate that the structures of the films vary obviously as the impact energy augments. The average relative density is generally monotone increase with the increment of impact energy. The hybridization of carbon atoms greatly affects the properties of hydrogenated DLC films. The transition between sp2 and sp3 will result in the graphitization and reduce the frictional coefficient when DLC films are used as tribo-pair in friction.

Structural properties and prebiotic activities of fractionated lotus seed resistant starches

2018 ◽  
Vol 251 ◽  
pp. 33-40 ◽  
Author(s):  
Hongliang Zeng ◽  
Peilin Chen ◽  
Chuanjie Chen ◽  
Cancan Huang ◽  
Shan Lin ◽  
...  
Keyword(s):  
Structural Properties ◽  
Lotus Seed ◽  
Resistant Starches

Moisture distribution model describes the effect of water content on the structural properties of lotus seed resistant starch

2019 ◽  
Vol 286 ◽  
pp. 449-458 ◽  
Author(s):  
Chuanjie Chen ◽  
Weiqing Fu ◽  
Qing Chang ◽  
Baodong Zheng ◽  
Yi Zhang ◽  
...  
Keyword(s):  
Water Content ◽  
Structural Properties ◽  
Resistant Starch ◽  
Moisture Distribution ◽  
Distribution Model ◽  
Lotus Seed ◽  
Effect Of Water

Effects of pullulanase pretreatment on the structural properties and digestibility of lotus seed starch-glycerin monostearin complexes

2020 ◽  
Vol 240 ◽  
pp. 116324 ◽  
Author(s):  
Yixin Zheng ◽  
Yujia Ou ◽  
Yi Zhang ◽  
Baodong Zheng ◽  
Shaoxiao Zeng ◽  
...  
Keyword(s):  
Structural Properties ◽  
Lotus Seed

EVALUATION OF THE OPERATIONAL WEAR OF THE SANDVIK CV117 CENTRIFUGAL CRUSHER

Tribologia ◽  
2020 ◽  
Vol 289 (1) ◽  
pp. 31-39
Author(s):  
Dominika GRYGIER
Keyword(s):  
Kinetic Energy ◽  
Structural Properties ◽  
Direct Contact ◽  
Operating Time ◽  
Full Scale ◽  
Impact Forces ◽  
The Impact ◽  
Macroscopic Analysis

The purpose of the study described in the work was to evaluate the operating wear of the SANDVIK CV117 centrifugal crusher working in the Melaphyre mine in Grzędy. The research was carried out on work elements, such as the lining assembly, rotor tips, shredder hammers, the directional bushing, and the distributor divider. All components had direct contact with the aggregate, and their operating time was about 1150 hours. The studies included a mine full scale observation, macroscopic analysis of the elements, and an assessment of the impact of exploitation on selected structural properties of the elements material. On the basis of the carried out analyses, it was concluded that the major problem faced by all the tested components is the simultaneous interaction of high friction and impact forces resulting from the kinetic energy of the accelerated grains of the material acquired from the rotor during operation of the crusher.

Effect of process-induced common bean hardness on structural properties of in vivo generated boluses and consequences for in vitro starch digestion kinetics

2019 ◽  
Vol 122 (04) ◽  
pp. 388-399 ◽  
Author(s):  
Andrea Pallares Pallares ◽  
Bram Loosveldt ◽  
Solomon N. Karimi ◽  
Marc Hendrickx ◽  
Tara Grauwet
Keyword(s):  
Common Bean ◽  
Structural Properties ◽  
Kinetic Modelling ◽  
Mechanical Degradation ◽  
Common Beans ◽  
Starch Digestion ◽  
Digestion Kinetics ◽  
The Impact

AbstractIn the present study, we evaluated the effect of process-induced common bean hardness on structural properties ofin vivogenerated boluses and the consequences forin vitrostarch digestion. Initially, the impact of human mastication on the particle size distribution (PSD) of oral boluses from common beans with different process-induced hardness levels was investigated through a mastication study. Then the effect of structural properties of selected boluses onin vitrostarch digestion kinetics was assessed. For a particular process-induced hardness level, oral boluses had similar PSD despite differences in masticatory parameters between participants of the mastication study. At different hardness levels, a clear effect of processing (P<0·0001) was observed. However, the effect of mastication behaviour (P=0·1141) was not significant. Two distinctive fractions were present in all boluses. The first one was a cotyledon-rich fraction consisting of majorly small particles (40–125 µm), which could be described as individual cells based on microscopic observations. This fraction increased with a decrease in process-induced hardness. The second fraction (>2000 µm) mostly contained seed coat material and did not change based on hardness levels. Thein vitrostarch digestion kinetics of common bean boluses was only affected by process-induced hardness. After kinetic modelling, significant differences were observed between the reaction rate constant of boluses generated from the hardest beans and those obtained from softer ones. Overall this work demonstrated that thein vitronutritional functionality of common beans is affected to a greater extent by structural properties induced by processing than by mechanical degradation in the mouth.

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