scholarly journals High-temperature heating and microwave pretreatments: A new light in bamboo's enzymatic hydrolysis

2016 ◽  
Vol 20 (3) ◽  
pp. 999-1002 ◽  
Author(s):  
Jiajia Fu ◽  
Yu Li ◽  
Qun Zhang ◽  
Shen Shen ◽  
Xiao-Ying Du ◽  
...  
Keyword(s):  
High Temperature ◽  
Enzymatic Hydrolysis ◽  
Protein Adsorption ◽  
Reducing Sugar ◽  
Sugar Yield ◽  
X Ray ◽  
Temperature Heating ◽  
Hydrolysis Of ◽  
High Temperature Heating

A combined technology of high-temperature heating and microwave is proposed to treat bamboo substrates prior to enzymatic hydrolysis to overcome the limits of ei- ther technology. The combined technology helps to promote the reducing sugar yield from enzymatic hydrolysis of bamboo. The protein adsorption test indicated that more enzyme proteins could adsorb on the surface of bamboo pretreated by the combined technology. Thus, the possibility of enzymes to hydrolyze bamboo increased. Meanwhile, X-ray diffractometry tested revealed that the combined technology benefited the removal of non-cellulosic substances from bamboo and resulted in a higher crystallinity.

The X-ray pattern of low-temperature cristobalite

1944 ◽  
Vol 27 (187) ◽  
pp. 54-55 ◽  
Author(s):  
A. H. Jay
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Open Hearth ◽  
Crystalline Material ◽  
The Other ◽  
Raw Material ◽  
X Ray ◽  
Temperature Heating ◽  
High Temperature Heating ◽  
Roof Brick

Cristobalite is found as the first product in the conversion of quartz following a high-temperature heating, and it constitutes a large percentage of the crystalline material in most manufactured silica bricks. It is present also in fireclay products, the amount being dependent upon the nature of the raw material and the conditions of firing. In the majority of these products the cristobalite is only poorly developed, i.e. the crystals are only perfect over distances of the order of about 1 × 10-6 cm. This value is derived from the diffuseness of the high-order reflections on the X-ray powder photograph. On the other hand, the crystals of cristobalite are well developed in the hot face of an open hearth silica roof-brick.

scholarly journals Isolasi dan Karakterisasi Selulosa Mikrokristal dari Ampas Tebu (Saccharum officinarum L.)

2019 ◽  
Vol 16 (2) ◽  
pp. 67-72
Author(s):  
Desy Nawangsari
Keyword(s):  
High Temperature ◽  
Microcrystalline Cellulose ◽  
Woody Plants ◽  
Saccharum Officinarum ◽  
Dilute Acid ◽  
Cellulose Production ◽  
Base Solution ◽  
Temperature Heating ◽  
Hydrolysis Of ◽  
High Temperature Heating

Microcrystalline cellulose is the result of isolation from alpha cellulose. Woody plants are generally the source of microcrystalline cellulose production. One of the natural ingredients that can be used to make microcrystalline cellulose is bagasse (Saccharum officinarum L.). Bagasse contains 37.65% of cellulose which can be isolated by the delignification stage using a base solution, the process of bleaching and hydrolysis of alpha cellulose by high temperature heating using dilute dilute acid. The yield of microcrystalline cellulose from bagasse 26.03% and fulfilling the characterization based on the literature.

scholarly journals Enzymatic Hydrolysis of Blend of Lignicellulosic Materials for Reducing Sugar Production: Screening of Significant Process Factors

2020 ◽  
pp. 1-10
Author(s):  
Bathlomew Chukwudi Amadi ◽  
Philomena Kañulia Igbokwe ◽  
Chijioke Elijah Onu
Keyword(s):  
Enzymatic Hydrolysis ◽  
Process Parameters ◽  
Confidence Level ◽  
Statistical Significance ◽  
Latin Square ◽  
Reducing Sugar ◽  
Sugar Yield ◽  
Blend Ratio ◽  
Process Factors ◽  
Hydrolysis Of

The screening of the process parameters on the enzymatic hydrolysis of a blend of two lignocellulosic materials - corn cob (CC) and deseeded fluted pumpkin fruit (DFPF) using Trichoderma reesei was the focus of the present study. Four process parameters – time, temperature, substrate blend ratio and pH were screened for statistical significance using a 4 x 4 matrix of Graeco-Latin square design of experiment. The reducing sugar yield was determined using the dinitrosalisylic acid (DNS) method and maximum reducing sugar yield of 57.92mg/ml obtained in 2days at 40oC, blend ratio of 0.2:0.8 (CC:DFPF) and pH 5.5. Result of the Analysis of Variance (ANOVA) obtained showed that with 3 degrees of freedom and 6 residual degree of freedom at 95% confidence level (i.e. 0.05 significance), time, temperature and substrate blend ratio significantly affected the enzymatic hydrolysis process whereas the effect of pH was not significant. However, only time was significant at 99% confidence level (0.01 significance) while temperature, substrate blend ratio and pH were not significant. This study has highlighted the significant factors among the process variables in emzymatic hydrolysis of a blend of CC and DFPF.

scholarly journals Effect of Severity Factor on the Subcritical Water and Enzymatic Hydrolysis of Coconut Husk for Reducing Sugar Production

2020 ◽  
Vol 15 (3) ◽  
pp. 786-797
Author(s):  
Maktum Muharja ◽  
Nur Fadhilah ◽  
Rizki Fitria Darmayanti ◽  
Hanny Frans Sangian ◽  
Tantular Nurtono ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Subcritical Water ◽  
Biomass Conversion ◽  
Reducing Sugar ◽  
Sugar Yield ◽  
Sugar Production ◽  
Severity Factor ◽  
Coconut Husk ◽  
Hydrolysis Process ◽  
Hydrolysis Of

Preventing the further degradation of monomeric or oligomeric sugar into by-product during biomass conversion is one of the challenges for fermentable sugar production. In this study, the performance of subcritical water (SCW) and enzymatic hydrolysis of coconut husk toward reducing sugar production was investigated using a severity factor (SF) approach. Furthermore, the optimal condition of SCW was optimized using response surface methodology (RSM), where the composition changes of lignocellulose and sugar yield as responses. From the results, at low SF of SCW, sugar yield escalated as increasing SF value. In the enzymatic hydrolysis process, the effect of SCW pressure is a significant factor enhancing sugar yield. A maximum total sugar yield was attained on the mild SF condition of 2.86. From this work, it was known that the SF approach is sufficient parameter to evaluate the SCW and enzymatic hydrolysis of coconut husk. Copyright © 2020 BCREC Group. All rights reserved 

scholarly journals Effect of high temperature pretreatment on xylanase and cellulase hydrolysis of bamboo

2015 ◽  
Vol 19 (4) ◽  
pp. 1341-1344 ◽  
Author(s):  
Qun Zhang ◽  
Jia-Jia Fu ◽  
Xiao-Ying Du ◽  
Rui-Juan Sun ◽  
Hong-Bo Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Enzymatic Hydrolysis ◽  
Temperature Treatment ◽  
Sugar Yield ◽  
Enzyme Hydrolysis ◽  
High Temperature Treatment ◽  
Temperature Pretreatment ◽  
Hydrolysis Of ◽  
Cellulase Hydrolysis

Cellulase and xylanase were applied to hydrolyze bamboo. High temperature treatment was launched to treat bamboo prior to enzymatic hydrolysis. Results indicated that bamboo with a high temperature pretreatment caused a more reduction of sugar yield. It is concluded that the high temperature pretreatment is the most effective method to strengthen enzyme hydrolysis towards bamboo.

Modeling the High-Temperature Heating of Scrap Metals

Vestnik MEI ◽  
2019 ◽  
Vol 6 ◽  
pp. 58-63
Author(s):  
Konstantin V. Strogonov ◽  
◽  
Andrey A. Chaymelov ◽  
Keyword(s):  
High Temperature ◽  
Scrap Metals ◽  
Temperature Heating ◽  
High Temperature Heating

Can microorganisms survive high-temperature heating during the interplanetary transfer by meteorites?

BIOPHYSICS ◽  
2007 ◽  
Vol 52 (6) ◽  
pp. 640-644 ◽  
Author(s):  
A. K. Pavlov ◽  
V. N. Shelegedin ◽  
V. T. Kogan ◽  
A. A. Pavlov ◽  
M. A. Vdovina ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Heating ◽  
High Temperature Heating
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