Xylitol Production from Rice Straw Hemicellulose Hydrolyzate by Polyacrylic Hydrogel Thin Films with Immobilized Candida subtropicalis WF79

2008 ◽  
Vol 105 (2) ◽  
pp. 97-105 ◽  
Author(s):  
Wen-Chang Liaw ◽  
Chee-Shan Chen ◽  
Wen-Shion Chang ◽  
Kuan-Pin Chen
Keyword(s):  
Thin Films ◽  
Rice Straw ◽  
Xylitol Production ◽  
Hemicellulose Hydrolyzate

Synthesis of Transparent Amorphous Carbon Thin Films from Cellulose Powder in Rice Straw

2016 ◽  
Vol 42 (1) ◽  
pp. 225-233 ◽  
Author(s):  
Mahmoud Fathy ◽  
Th. Abdel Moghny ◽  
Mahmoud Ahmed Mousa ◽  
Abdel-Hameed A-A. El-Bellihi ◽  
Ahmed E. Awadallah
Keyword(s):  
Thin Films ◽  
Rice Straw ◽  
Amorphous Carbon ◽  
Cellulose Powder ◽  
Carbon Thin Films

scholarly journals Evaluation of nutrient supplementation to charcoal-treated and untreated rice straw hydrolysate for xylitol production by Candida guilliermondii

2005 ◽  
Vol 48 (3) ◽  
pp. 497-502 ◽  
Author(s):  
Solange Inês Mussatto ◽  
Inês Conceição Roberto
Keyword(s):  
Calcium Chloride ◽  
Rice Straw ◽  
Rice Bran ◽  
Activated Charcoal ◽  
Candida Guilliermondii ◽  
Xylitol Production ◽  
Nutrient Supplementation ◽  
Hemicellulosic Hydrolysate ◽  
Rice Straw Hydrolysate ◽  
Xylitol Yield

Xylitol was produced by Candida guilliermondii from charcoal-treated and untreated rice straw hemicellulosic hydrolysate with or without nutrients (ammonium sulphate, calcium chloride, rice bran extract). Both, xylitol yield and volumetric productivity decreased significantly when the nutrients were added to treated and untreated hydrolysates. In the treated hydrolysate, the efficiency of xylose conversion to xylitol was 79% when the nutrients were omitted. The results demonstrated that rice straw hemicellulosic hydrolysate treated with activated charcoal was a cheap source of xylose and other nutrients for xylitol production by C. guilliermondii. The non-necessity of adding nutrients to the hydrolysate media would be very advantageous since the process becomes less costly.

Production of ethanol and mycelial biomass from rice straw hemicellulose hydrolyzate by Mucor indicus

2006 ◽  
Vol 41 (3) ◽  
pp. 653-658 ◽  
Author(s):  
Keikhosro Karimi ◽  
Giti Emtiazi ◽  
Mohammad J. Taherzadeh
Keyword(s):  
Rice Straw ◽  
Mycelial Biomass ◽  
Hemicellulose Hydrolyzate ◽  
Mucor Indicus

scholarly journals Optimized Bioconversion of Xylose Derived from Pre-Treated Crop Residues into Xylitol by Using Candida boidinii

Agronomy ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 79
Author(s):  
Soma Bedő ◽  
Anikó Fehér ◽  
Panwana Khunnonkwao ◽  
Kaemwich Jantama ◽  
Csaba Fehér
Keyword(s):  
Rice Straw ◽  
Wheat Bran ◽  
Crop Residues ◽  
Low Cost ◽  
Oxygen Transfer Rate ◽  
Candida Boidinii ◽  
Xylitol Production ◽  
Xylitol Fermentation ◽  
Xylose Concentration ◽  
Xylitol Yield

Crop residues can serve as low-cost feedstocks for microbial production of xylitol, which offers many advantages over the commonly used chemical process. However, enhancing the efficiency of xylitol fermentation is still a barrier to industrial implementation. In this study, the effects of oxygen transfer rate (OTR) (1.1, 2.1, 3.1 mmol O2/(L × h)) and initial xylose concentration (30, 55, 80 g/L) on xylitol production of Candida boidinii NCAIM Y.01308 on xylose medium were investigated and optimised by response surface methodology, and xylitol fermentations were performed on xylose-rich hydrolysates of wheat bran and rice straw. High values of maximum xylitol yields (58–63%) were achieved at low initial xylose concentration (20–30 g/L) and OTR values (1.1–1.5 mmol O2/(L × h)). The highest value for maximum xylitol productivity (0.96 g/(L × h)) was predicted at 71 g/L initial xylose and 2.7 mmol O2/(L × h) OTR. Maximum xylitol yield and productivity obtained on wheat bran hydrolysate were 60% and 0.58 g/(L × h), respectively. On detoxified and supplemented hydrolysate of rice straw, maximum xylitol yield and productivity of 30% and 0.19 g/(L × h) were achieved. This study revealed the terms affecting the xylitol production by C. boidinii and provided validated models to predict the achievable xylitol yields and productivities under different conditions. Efficient pre-treatments for xylose-rich hydrolysates from rice straw and wheat bran were selected. Fermentation using wheat bran hydrolysate and C. boidinii under optimized condition is proved as a promising method for biotechnological xylitol production.

The study of interfacial reactions of nickel thin films on GaAs

1983 ◽  
Vol 41 ◽  
pp. 156-157
Author(s):  
L.J. Chen ◽  
Y.F. Hsieh
Keyword(s):  
Thin Films ◽  
Integrated Circuits ◽  
Interfacial Reactions ◽  
Metal Contacts ◽  
Nickel Thin Films ◽  
Thin Foils ◽  
The Status ◽  
Si Doped ◽  
Electron Microscopes

One measure of the maturity of a device technology is the ease and reliability of applying contact metallurgy. Compared to metal contact of silicon, the status of GaAs metallization is still at its primitive stage. With the advent of GaAs MESFET and integrated circuits, very stringent requirements were placed on their metal contacts. During the past few years, extensive researches have been conducted in the area of Au-Ge-Ni in order to lower contact resistances and improve uniformity. In this paper, we report the results of TEM study of interfacial reactions between Ni and GaAs as part of the attempt to understand the role of nickel in Au-Ge-Ni contact of GaAs.N-type, Si-doped, (001) oriented GaAs wafers, 15 mil in thickness, were grown by gradient-freeze method. Nickel thin films, 300Å in thickness, were e-gun deposited on GaAs wafers. The samples were then annealed in dry N2 in a 3-zone diffusion furnace at temperatures 200°C - 600°C for 5-180 minutes. Thin foils for TEM examinations were prepared by chemical polishing from the GaA.s side. TEM investigations were performed with JE0L- 100B and JE0L-200CX electron microscopes.

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