keyword
MENU ▼
Read by QxMD icon Read
search

Bioethanol

keyword
https://www.readbyqxmd.com/read/28330307/effect-of-particle-size-moisture-content-and-supplements-on-selective-pretreatment-of-cotton-stalks-by-daedalea-flavida-and-enzymatic-saccharification
#1
Harmanpreet Meehnian, Asim K Jana, Mithu Maiti Jana
A large amount of cotton stalk waste biomass with high cellulose content are incinerated by the farmers causing air pollution. The high cellulose content of cotton stalks can be converted to fermentable sugars by fungal delignification pretreatment of lignocellulosic biomass and enzymatic saccharification. The effect of particle size, moisture content, and media supplements was studied for delignification of cotton stalks by Daedalea flavida MTCC 145 (DF-2) in solid-state fermentation. The highest lignolytic enzyme activities, optimal lignin degradation 29...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330264/construction-of-recombinant-sestc-saccharomyces-cerevisiae-for-consolidated-bioprocessing-cellulase-characterization-and-ethanol-production-by-in-situ-fermentation
#2
Peizhou Yang, Haifeng Zhang, Shaotong Jiang
Bioethanol is an important oil substitute produced by the sugar fermentation process. To improve the efficiency of cellulase expression of Saccharomyces cerevisiae, a eukaryotic expression vector harboring a single-enzyme-system-three-cellulase gene (sestc) was integrated into the S. cerevisiae genome by the protoplast method. Using PCR screening, RT-PCR, and "transparent circle" detection, several recombinant S. cerevisiae strains, capable of efficiently expressing the heterogeneous cellulase, were selected...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330218/bacterial-carrageenases-an-overview-of-production-and-biotechnological-applications
#3
REVIEW
Prakram Singh Chauhan, Arunika Saxena
Carrageenan, one of the phycocolloids is a sulfated galactan made up of linear chains of galactose and 3,6-anhydrogalactose with alternating α-(1 → 3) and β-(1 → 4) linkages and further classified based on the number and the position of sulfated ester(s); κ-, ι- and λ-carrageenan. Enzymes which degrade carrageenans are called k-, ι-, and λ-carrageenases. They all are endohydrolases that cleave the internal β-(1-4) linkages of carrageenans yielding products of the oligo-carrageenans. These enzymes are produced only by bacteria specifically gram negative bacteria...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330211/cellulase-production-using-natural-medium-and-its-application-on-enzymatic-hydrolysis-of-thermo-chemically-pretreated-biomass
#4
Shivani Sharma, Vinay Sharma, Arindam Kuila
Lignocellulosic bioethanol is an important renewable fuel for transportation purpose. Commercial production of lignocellulosic bioethanol mainly depends on cost of cellulase production, efficient pretreatment and enzymatic hydrolysis process. In the present study cellulase production from Aspergillus niger under submerged fermentation (SmF) was optimized using coconut water as natural medium. Maximum cellulase production (0.53 IU/mL) was achieved within 3 days of incubation using 8 % (w/v) waste paper and 0...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330203/evaluation-of-several-ionic-liquids-for-in-situ-hydrolysis-of-empty-fruit-bunches-by-locally-produced-cellulase
#5
Amal Ahmed Elgharbawy, Md Zahangir Alam, Nassereldeen Ahmad Kabbashi, Muhammad Moniruzzaman, Parveen Jamal
Lignocellulosic biomasses, exhibit resistance to enzymatic hydrolysis due to the presence of lignin and hemicellulose. Ionic liquids proved their applicability in lignin degradation, however, ionic liquid removal has to be performed to proceed to hydrolysis. Therefore, this study reports an in situ hydrolysis of empty fruit bunches (EFB) that combined an ionic liquid (IL) pretreatment and enzymatic hydrolysis. For enzyme production, palm kernel cake (PKC) was used as the primary media for microbial cellulase (PKC-Cel) from Trichoderma reesei (RUTC30)...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330171/purification-and-characterization-of-endo-%C3%AE-1-4-d-glucanase-from-trichoderma-harzianum-strain-hzn11-and-its-application-in-production-of-bioethanol-from-sweet-sorghum-bagasse
#6
Zabin K Bagewadi, Sikandar I Mulla, Harichandra Z Ninnekar
An acidophilic-solvent-thermostable endo β-1,4-D-glucanase produced from a potential Trichoderma harzianum strain HZN11 was purified to homogeneity by DEAE-Sepharose and Sephadex G-100 chromatography with 33.12 fold purification with specific activity of 66.25 U/mg and molecular mass of ~55 kDa. The optimum temperature and pH were 60 °C and 5.5 retaining 76 and 85 % of activity after 3 h, respectively. It showed stability between pH 4.5-6.0 and temperature between 50-70 °C indicating thermostability...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330139/production-of-bioethanol-as-useful-biofuel-through-the-bioconversion-of-water-hyacinth-eichhornia-crassipes
#7
Arpan Das, Priyanka Ghosh, Tanmay Paul, Uma Ghosh, Bikas Ranjan Pati, Keshab Chandra Mondal
Water hyacinth (Eichhornia crassipes) represents a promising candidate for fuel ethanol production in tropical countries because of their high availability and high biomass yield. Bioconversion of such biomass to bioethanol could be wisely managed through proper technological approach. In this work, pretreatment of water hyacinth (10 %, w/v) with dilute sulfuric acid (2 %, v/v) at high temperature and pressure was integrated in the simulation and economic assessment of the process for further enzymatic saccharification was studied...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28325660/production-of-bioethanol-from-napier-grass-via-simultaneous-saccharification-and-co-fermentation-in-a-modified-bioreactor
#8
Yu-Kuo Liu, Wei-Chuan Chen, Yu-Ching Huang, Yu-Kaung Chang, I-Ming Chu, Shen-Long Tsai, Yu-Hong Wei
The aim of this study was to use a modified bioreactor system for simultaneous saccharification of cellulose and bioethanol production. We tested Aspergillus niger and Trichoderma reesei for cellulose saccharification and Zymomonas mobilis for bioethanol production simultaneously in this modified bioreactor. The results showed that various carboxymethylcellulose (CMC) concentrations (10, 15, or 20 g/L) as a substrate for A. niger and T. reesei yielded bioethanol production of 0.51, 0.78, and 0.89 g/L and a CMC conversion rate of 10...
March 18, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28325310/production-of-bioethanol-from-pre-treated-cotton-fabrics-and-waste-cotton-materials
#9
Svetlana Nikolić, Vesna Lazić, Đorđe Veljović, Ljiljana Mojović
This study highlights the potential of cotton fabric as a promising feedstock for the production of bioethanol as renewable biofuel. The effect of corona pre-treatment of non-mercerized and mercerized cotton fabrics on glucose and ethanol yield is discussed. Fermentation kinetics for ethanol production and the basic process parameters were assessed and compared. Corona pre-treatment of cotton fabrics led to an increase in the glucose yield (compared to control sample) during enzymatic hydrolysis, and consequently the ethanol yield during fermentation by yeast Saccharomyces cerevisiae var...
May 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28314873/exploring-the-bioprospecting-and-biotechnological-potential-of-white-rot-and-anaerobic-neocallimastigomycota-fungi-peptidases-esterases-and-lignocellulolytic-enzymes
#10
REVIEW
Ronivaldo Rodrigues da Silva, Rafael Pedezzi, Tatiane Beltramini Souto
Fungi constitute an invaluable natural resource for scientific research, owing to their diversity; they offer a promising alternative for bioprospecting, thus contributing to biotechnological advances. For a long time, extensive information has been exploited and fungal products have been tested as a source of natural compounds. In this context, enzyme production remains a field of interest, since it offers an efficient alternative to the hazardous processes of chemical transformations. Owing to their vast biodiversity and peculiar biochemical characteristics, two fungal categories, white-rot and anaerobic Neocallimastigomycota, have gathered considerable attention for biotechnological applications...
March 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28286012/development-of-a-novel-ultrasound-assisted-alkali-pretreatment-strategy-for-the-production-of-bioethanol-and-xylanases-from-chili-post-harvest-residue
#11
Raveendran Sindhu, Parameswaran Binod, Anil Kuruvilla Mathew, Amith Abraham, Edgard Gnansounou, Sabeela Beevi Ummalyma, Leya Thomas, Ashok Pandey
A novel ultrasound-assisted alkali pretreatment strategy was developed which could effectively remove lignin and hemicelluloses and improve the sugar yield from chili post harvest residue. Operational parameters that affect the pretreatment efficiency were studied and optimized. Inhibitor analysis of the hydrolyzate revealed that major fermentation inhibitors like furfural, 5-hydroxymethyl furfural as well as organic acids like citric acid, succinic acid and propionic acid were absent. Hence fermentation can be carried out without detoxification of the hydrolyzate...
March 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28278249/expression-of-c-5-sterol-desaturase-from-an-edible-mushroom-in-fisson-yeast-enhances-its-ethanol-and-thermotolerance
#12
Ayushi Kamthan, Mohan Kamthan, Asis Datta
Bioethanol is an environment friendly and renewable source of energy produced by the fermentation of agricultural raw material by a variety of microorganisms including yeast. Obtaining yeast strains that are tolerant to stresses like high levels of ethanol and high temperature is highly desirable as it reduces cost and increases yield during bioethanol production. Here, we report that heterologous expression of C-5 Sterol desaturase (FvC5SD)-an ergosterol biosynthesis enzyme from an edible mushroom Flammulina velutipes in fission yeast, not only imparts increased thermotolerance but also tolerance towards high ethanol concentration and low pH...
2017: PloS One
https://www.readbyqxmd.com/read/28265300/production-of-high-concentrated-cellulosic-ethanol-by-acetone-water-oxidized-pretreated-beech-wood
#13
Constantinos Katsimpouras, Konstantinos G Kalogiannis, Aggeliki Kalogianni, Angelos A Lappas, Evangelos Topakas
BACKGROUND: Lignocellulosic biomass is an abundant and inexpensive resource for biofuel production. Alongside its biotechnological conversion, pretreatment is essential to enable efficient enzymatic hydrolysis by making cellulose susceptible to cellulases. Wet oxidation of biomass, such as acetone/water oxidation, that employs hot acetone, water, and oxygen, has been found to be an attractive pretreatment method for removing lignin while producing less degradation products. The remaining enriched cellulose fraction has the potential to be utilized under high gravity enzymatic saccharification and fermentation processes for the cost-competing production of bioethanol...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28264772/towards-a-competitive-solid-state-fermentation-cellulases-production-from-coffee-husk-by-sequential-batch-operation-and-role-of-microbial-diversity
#14
Alejandra Cerda, Teresa Gea, M Carmen Vargas-García, Antoni Sánchez
The cost of cellulases is the main bottleneck for bioethanol production at commercial scale. Solid-state fermentation (SSF) is a promising technology that can potentially reduce cellulases cost by using wastes as substrates. In this work, a SSF system of 4.5L bioreactors was operated continuously by sequential batch operation using the fermented solids from one batch to inoculate the following batch. Coffee husk was used as lignocellulosic substrate. Compost was used as starter in the first batch to provide a rich microbiota...
March 3, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28258995/comparison-of-red-microalgae-porphyridium-cruentum-culture-conditions-for-bioethanol-production
#15
Ho Myeong Kim, Chi Hoon Oh, Hyeun-Jong Bae
Microalgae biomass are useful resources in biofuel production. The objective of this study was to evaluate bioethanol production in response to Porphyridium cruemtum culture conditions. Enzymatic hydrolysis of seawater P. cruemtum (SPC) and freshwater P. cruemtum (FPC, 1% substrate loading, w/v) resulted in glucose conversion yields of 89.8 and 85.3%, respectively, without any pretreatment. However, FPC hydrolysate was more efficiently converted to ethanol about 7.1% than SPC hydrolysate. The comparison of separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) showed that SSF processing is a superior method for bioethanol production from both SPC and FPC...
February 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28255577/effect-of-harvesting-stage-on-sweet-sorghum-sorghum-bicolor-l-genotypes-in-western-kenya
#16
Moses Owuor Oyier, James O Owuoche, Maurice E Oyoo, Erick Cheruiyot, Betty Mulianga, Justice Rono
Harvesting stage of sweet sorghum (Sorghum bicolor L. Moench) cane is an important aspect in the content of sugar for production of industrial alcohol. Four sweet sorghum genotypes were evaluated for harvesting stage in a randomized complete block design. In order to determine sorghum harvest growth stage for bioethanol production, sorghum canes were harvested at intervals of seven days after anthesis. The genotypes were evaluated at different stages of development for maximum production of bioethanol from flowering to physiological maturity...
2017: TheScientificWorldJournal
https://www.readbyqxmd.com/read/28248990/a-transcriptomic-survey-of-migdolus-fryanus-sugarcane-rhizome-borer-larvae
#17
Darlan Gonçalves Nakayama, Célio Dias Santos Júnior, Luciano Takeshi Kishi, Rafael Pedezzi, Adelita Carolina Santiago, Andrea Soares-Costa, Flavio Henrique-Silva
Sugarcane, a major crop grown in the tropical and subtropical areas of the world, is produced mainly for sucrose, which is used as a sweetener or for the production of bioethanol. Among the numerous pests that significantly affect the yield of sugarcane, the sugarcane rhizome borer (Migdolus fryanus, a cerambycidae beetle) is known to cause severe damage to the crops in Brazil. The absence of molecular information about this insect reinforces the need for studies and an effective method to control this pest...
2017: PloS One
https://www.readbyqxmd.com/read/28244325/electrochemical-assay-for-a-total-cellulase-activity-with-improved-sensitivity
#18
Deby Fapyane, Elena E Ferapontova
Electrochemical methods allow fast and inexpensive analysis of enzymatic activities. Here, we report a simple and yet efficient electrochemical assay for the total activity of cellulase, a hydrolytic enzyme widely used in food and textiles industries, and for production of bioethanol. The assay exploits the difference in electrochemical signals from a soluble redox indicator, ferricyanide, on nitrocellulose films treated by cellulases. Ferricyanide electrochemistry is totally inhibited on graphite electrodes modified with an insulating nitrocellulose film and is evoked after the cellulase treatment...
March 13, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28243606/optimization-of-hydrothermal-and-diluted-acid-pretreatments-of-tunisian-luffa-cylindrica-l-fibers-for-2g-bioethanol-production-through-the-cubic-central-composite-experimental-design-ccd-response-surface-methodology
#19
Kaouther Zaafouri, Manel Ziadi, Aida Ben Hassen-Trabelsi, Sabrine Mekni, Balkiss Aïssi, Marwen Alaya, Latifa Bergaoui, Moktar Hamdi
This paper opens up a new issue dealing with Luffa cylindrica (LC) lignocellulosic biomass recovery in order to produce 2G bioethanol. LC fibers are composed of three principal fractions, namely, α-cellulose (45.80%  ± 1.3), hemicelluloses (20.76%  ± 0.3), and lignins (13.15%  ± 0.6). The optimization of LC fibers hydrothermal and diluted acid pretreatments duration and temperature were achieved through the cubic central composite experimental design CCD. The pretreatments optimization was monitored via the determination of reducing sugars...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28231534/efficient-utilization-of-hemicellulose-and-cellulose-in-alkali-liquor-pretreated-corncob-for-bioethanol-production-at-high-solid-loading-by-spathaspora-passalidarum-u1-58
#20
Hai Yu, Jian Guo, Yefu Chen, Gengxin Fu, Baozhong Li, Xuewu Guo, Dongguang Xiao
The bioethanol fermentation of pretreated corncob was investigated using Spathaspora passalidarum U1-58, which simultaneously utilizes glucose and xylose for high-efficiency ethanol production. Two approaches, namely, separate hydrolysis and co-fermentation (SHCF) and simultaneous saccharification and co-fermentation (SSCF), were optimized to test the ethanol fermentation potential of U1-58. The highest ethanol titer of 42.46g/L and yield of 72.12% were acquired in SHCF, whereas 53.24g/L ethanol and yield of 75...
February 11, 2017: Bioresource Technology
keyword
keyword
35803
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"