Effect of the Enzymatic Hydrolysis on Starch Properties

2015 ◽  
Vol 723 ◽  
pp. 701-704
Author(s):  
Jing Li
Keyword(s):  
Tensile Strength ◽  
Enzymatic Hydrolysis ◽  
Corn Starch ◽  
Modified Starch ◽  
Starch Granules ◽  
Compound Structure ◽  
Starch Properties ◽  
Better Than

In this article, corn starch was modified by α-amylase with different hydrolytic time (30, 60, 90 and 120 min) and the effects of modification technology on its properties of viscosity, compound structure and mechanical were studied. The result showed that structure of modified starch was conserved with hydrolytic time increased, whereas tensile strength were increased and viscosity was decreased. The performance of modified starch that hydrolyzed by 30 min was better than others and pinholes were generated in the surface of starch granules

scholarly journals Chitosan Modified Corn Starch and Its Application as a Glass Fibre Sizing Agent

2017 ◽  
Vol 25 (0) ◽  
pp. 112-120 ◽  
Author(s):  
Ying Wang ◽  
Jianfeng Li ◽  
Hui Li ◽  
Xiaodan Wang ◽  
Hong Lei ◽  
...  
Keyword(s):  
Surface Tension ◽  
Tensile Strength ◽  
Glass Fiber ◽  
Glass Fibre ◽  
Corn Starch ◽  
Modified Starch ◽  
Film Forming ◽  
Emulsion Film ◽  
Overall Performance ◽  
Strength And Stiffness

Chitosan-modified corn starch was prepared and then applied as a glass fiber sizing agent. The effect of the chitosan on starch-based emulsion, film and sized glass fiber was studied. When 5 % of the chitosan was added, the overall performance of the modified film-forming agent was optimal. The viscosity, surface tension and zeta potential of the sizing agent were 44.99 mPa·s, 51.29 mN·m[sup]-1[/sup] and 4.5 mV, respectively. The modified sizing agent could easily spread over the surface of glass fibre, and conglutinated to the glass surface firmly. The tensile strength and stiffness of modified-starch glass fiber reached 0.43 N·tex[sup]-1[/sup] and 4.96 cm. Glass fiber with good overall performance was obtained.

Cereal grain digestion by selected strains of ruminal fungi

1993 ◽  
Vol 39 (4) ◽  
pp. 367-376 ◽  
Author(s):  
T. A. McAllister ◽  
Y. Dong ◽  
L. J. Yanke ◽  
H. D. Bae ◽  
K.-J. Cheng ◽  
...  
Keyword(s):  
Corn Starch ◽  
Fungal Growth ◽  
Wheat Starch ◽  
Cereal Grains ◽  
Starch Granules ◽  
Starch Digestion ◽  
Protein Matrix ◽  
Cereal Grain ◽  
Neocallimastix Patriciarum ◽  
Grain Starch

The ruminal fungi Orpinomyces joyonii strain 19-2, Neocallimastix patriciarum strain 27, and Piromyces communis strain 22 were examined for their ability to digest cereal starch. All strains digested corn starch more readily than barley or wheat starch. Orpinomyces joyonii 19-2 exhibited the greatest propensity to digest starch in wheat and barley, whereas the digestion of these starches by N. patriciarum 27 and P. communis 22 was limited. Media ammonia concentrations were lower when fungal growth was evident, suggesting that all strains assimilate ammonia. Fungi formed extensive rhizoidal systems on the endosperm of corn, but O. joyonii 19-2 was the only strain to form such systems on the endosperm of wheat and barley. All strains penetrated the protein matrix of corn but did not penetrate starch granules. Starch granules from all three cereals were pitted, evidence of extensive digestion by extracellular amylases produced by O. joyonii 19-2. Similar pitting was observed on the surface of corn starch granules digested by N. patriciarum 27 and P. communis 22, but not on wheat and barley starch granules. The ability of ruminal fungi to digest cereal grains depends on both the strain of fungus and the type of grain. The extent to which fungi digest cereal grain in the rumen remains to be determined.Key words: ruminal fungi, cereal grain, starch digestion, ruminant.

scholarly journals Physicochemical characteristics of modified starch granules from Durio zibethinus Murr. var. Bintana

2021 ◽  
Author(s):  
Rini Hardiyanti ◽  
S. Suharman ◽  
M. Zulham Efendi Sinaga ◽  
I. Putu Mahendra ◽  
Adrian Hartanto
Keyword(s):  
Physicochemical Characteristics ◽  
Modified Starch ◽  
Starch Granules ◽  
Durio Zibethinus

Test Methods for Mechanical Properties of Structural Adhesives

2010 ◽  
Vol 97-101 ◽  
pp. 814-817 ◽  
Author(s):  
Jun Deng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Shear Strength ◽  
Elastic Modulus ◽  
Butt Joint ◽  
Test Methods ◽  
Joint Specimen ◽  
Lap Shear ◽  
Better Than

One of the greatest drawbacks to predicting the behaviour of bonded joints has been the lack of reliable data on the mechanical properties of adhesives. In this study, methods for determining mechanical properties of structural adhesive were discussed. The Young’s modulus, Poisson’s ratio and tensile strength of the adhesive were tested by dogbone specimens (bulk form) and butt joint specimens (in situ form). The shear modulus and shear strength were test by V-notched specimens (bulk form) and thick adherend lap-shear (TALS) joint specimens (in situ form). The test results show that the elastic modulus provided by the manufacturer is too low, the dogbone specimen is better than the butt joint specimen to test the tensile strength and elastic modulus and the TALS joint specimen is better than the V-notched specimen to test the shear strength.

Studies on Rye Starch Properties and Modification. Part I: Composition and Properties of Rye Starch Granules

1991 ◽  
Vol 43 (9) ◽  
pp. 331-339 ◽  
Author(s):  
Friedrich Schierbaum ◽  
Sylvia Radosta ◽  
Manfred Richter ◽  
Bernd Kettlitz ◽  
Christine Gernat
Keyword(s):  
Starch Granules ◽  
Starch Properties

Thermal behaviour of corn starch granules under action of fungal α-amylase

2008 ◽  
Vol 93 (2) ◽  
pp. 445-449 ◽  
Author(s):  
L. G. Lacerda ◽  
M. A. da Silva Carvalho Filho ◽  
I. M. Demiate ◽  
G. Bannach ◽  
M. Ionashiro ◽  
...  
Keyword(s):  
Thermal Behaviour ◽  
Corn Starch ◽  
Starch Granules

Studies on the Development of Benzoyl Peroxide Catalysed Rapid Oil Tanning using Linseed Oil

2021 ◽  
Vol 116 (7) ◽  
Author(s):  
Bindia Sahu ◽  
Jaya Prakash Alla ◽  
Gladstone Christopher Jayakumar
Keyword(s):  
Amino Acids ◽  
Tensile Strength ◽  
Physical Properties ◽  
Water Absorption ◽  
Benzoyl Peroxide ◽  
Special Class ◽  
Linseed Oil ◽  
Tanning Process ◽  
Remarkable Reduction ◽  
Better Than

Leather tanning is a stabilisation process of skin fibers. This is achieved by the interaction of collagen amino acids with tanning agents to stabilise skin from putrefaction. Tanning of collagen with oil is a special class of tanning known as chamois tanning. Chemically, the oil tanning involves oxidation of unsaturation present in the oil, which is generally achieved by exposing oil treated skins to air. In this study, Benzoyl peroxide has been used as an accelerating agent for oxidation of unsaturated bonds present in the linseed oil for oil tanning process. Results shows remarkable reduction in tanning duration from fifteen days to two days. The chamois leathers prepared using oxidation accelerant (Benzoyl peroxide) have been evaluated for physical properties such as water absorption (611%), tensile strength (18 N/mm2) and percentage of elongation (66 %) which are found to be better than control leathers.

Effect of the Heat-Moisture Treatment on the Enzymatic Susceptibility of Corn Starch Granules

1995 ◽  
Vol 47 (6) ◽  
pp. 223-228 ◽  
Author(s):  
Célia M. L. Franco ◽  
César F. Ciacco ◽  
Débora Q. Tavares
Keyword(s):  
Corn Starch ◽  
Starch Granules ◽  
Heat Moisture Treatment ◽  
Moisture Treatment

Surface Modification of Starch and its Application in Rubber Composite with Low Heat Generation and High Fatigue Resistant

2011 ◽  
Vol 194-196 ◽  
pp. 2409-2414
Author(s):  
Qing Hong Fang ◽  
Tian Yu Li ◽  
Na Wang ◽  
Li Jun Jin ◽  
Yue Liang
Keyword(s):  
Surface Modification ◽  
Corn Starch ◽  
Modified Starch ◽  
Organic Solution ◽  
Rubber Composites ◽  
Grafting Reaction ◽  
Rubber Composite ◽  
High Fatigue ◽  
Ether Ester ◽  
Reinforcing Filler

The surface modification of corn starch and the use of modified starch as reinforcing filler partly replaced carbon black in rubber composites were studied. The surface of starch was modified with 3, 4-2H-dihydropyran and maleic anhydride by grafting reaction in organic solution, that is, the process of etherification and the esterification of the starch. The structure of the ether ester starch was investigated by FTIR, SEM. Based on the results of the mechanical and heat building up properties of composite, it is showed that using modified starch as reinforcement filler filled into the rubber partly replaced CB, the characteristics of high flex life and low heat building up for composite can be obtained.

Sign in / Sign up

Export Citation Format

Share Document