Role of amylolytic activities during pregermination on rice kernel morphology and physicochemical properties of isolated starch

2018 ◽  
Vol 95 (4) ◽  
pp. 543-554 ◽  
Author(s):  
Warunee Kupkanchanakul ◽  
Masubon Thongngam ◽  
Yong-Cheng Shi ◽  
Onanong Naivikul
Keyword(s):  
Physicochemical Properties ◽  
Kernel Morphology

Characteristics Of The Structure Formation Of Gypsum Binder Modified With Zinc Hydrosilicates

2020 ◽  
pp. 40-46
Keyword(s):  
Synergistic Effect ◽  
Physicochemical Properties ◽  
Structure Formation ◽  
Silicic Acid ◽  
Chemical Properties ◽  
Crystal Formation ◽  
Ability To Act ◽  
Chemical Factors ◽  
Sorption Characteristics

The authors' methodic for assessing the role of chemical and physic-chemical factors during the structure formation of gypsum stone is presented in the article. The methodic is also makes it possible to reveal the synergistic effect and to determine the ranges of variation of controls factors that ensure maximum values of such effect. The effect of a micro-sized modifier based on zinc hydro-silicates on the structure formation of building gypsum is analyzed and corresponding dependencies are found. It is shown that effects of influence of modifier on the properties of gypsum compositions are determined by chemical properties of modifier. Among the mentioned properties are sorption characteristics (which depend on the amount of silicic acid and its state) and physicochemical properties - the ability to act as a substrate during crystal formation. The proposed method can also be extended to other binding substances and materials. This article contributes to the understanding of the processes that occur during the structure formation of composites, which will make it possible to control the structure formation in the future, obtaining materials with a given set of properties.

scholarly journals The Role of H2C2O4 and Na2CO3 as Precipitating Agents on The Physichochemical Properties and Photocatalytic Activity of Bismuth Oxide

2020 ◽  
Vol 18 (1) ◽  
pp. 129-137
Author(s):  
Yayuk Astuti ◽  
Rizka Andianingrum ◽  
Abdul Haris ◽  
Adi Darmawan ◽  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Physicochemical Properties ◽  
Bismuth Oxide ◽  
Rate Constants ◽  
Degradation Rate ◽  
Precipitation Method ◽  
Methyl Orange Degradation ◽  
Methyl Orange Dye

AbstractSynthesis of bismuth oxide synthesis through the precipitation method using H2C2O4 and Na2CO3 precipitating agents, identification of physicochemical properties and its photocatalysis activity for methyl orange degradation were conducted. The bismuth oxide synthesis was undertaken by dissolving Bi(NO3)3.5H2O in HNO3, then added precipitating agents to form precipitate. The results showed that bismuth oxide produced by H2C2O4 precipitating agent was a yellow powder containing a mixture of α-Bi2O3 (monoclinic) and β-Bi2O3 (tetragonal), porous with size of 28-85 μm. Meanwhile, the use of Na2CO3 as precipitating agent resulted in bismuth oxide consisting of α-Bi2O3 and β-Bi2O3 and Bi2O4, irregular shape without pore being 40-115 μm in size. Bismuth oxide synthesized with H2C2O4 precipitating agent showed higher photocatalytic activity compared to bismuth oxide synthesized using Na2CO3 on degrading methyl orange dye with degradation rate constants of 2.35x10-5 s-1 for H2C2O4 and 1.81x10-5 s-1 for Na2CO3.

The role of hydrophobic alkyl chains in the physicochemical properties of poly(β-amino ester)/DNA complexes

2015 ◽  
Vol 126 ◽  
pp. 374-380 ◽  
Author(s):  
Azahara Rata-Aguilar ◽  
Nathaly Segovia-Ramos ◽  
Ana Belén Jódar-Reyes ◽  
Víctor Ramos-Pérez ◽  
Salvador Borrós ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Amino Ester ◽  
Dna Complexes ◽  
Alkyl Chains

Sb-V-Ox catalysts—Role of chemical composition of MCM-41 supports in physicochemical properties

2009 ◽  
Vol 142 (3-4) ◽  
pp. 175-180 ◽  
Author(s):  
H. Golinska ◽  
P. Decyk ◽  
M. Ziolek ◽  
J. Kujawa ◽  
E. Filipek
Keyword(s):  
Chemical Composition ◽  
Physicochemical Properties ◽  
Mcm 41

scholarly journals The Role of Montmorillonite Loading on the Physicochemical Properties of Regenerated Cellulose Nanocomposite Films Obtained from Microcrystalline Cellulose

2020 ◽  
Vol 31 (1) ◽  
pp. 85-103
Author(s):  
P. R. D. Weerasooriya ◽  
◽  
S. N. Ain Jamal ◽  
M. K. Mohamad Haafiz ◽  
H. P. S. Abdul Khalil ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Microcrystalline Cellulose ◽  
Nanocomposite Films ◽  
Regenerated Cellulose
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