Thermochemical characterization of Nigerian Jatropha curcas fruit and seed residues for biofuel production

2018 ◽  
Vol 3 (6) ◽  
pp. 330-337 ◽  
Author(s):  
T. E. Odetoye ◽  
T. J. Afolabi ◽  
M. S. Abu Bakar ◽  
J. O. Titiloye
Keyword(s):  
Jatropha Curcas ◽  
Biofuel Production

Characterization of Halophilic Acyl-CoA Thioesterase from Chromohalobacter salexigens for Use in Biofuel Production

2013 ◽  
Vol 2 (4) ◽  
pp. 275-283 ◽  
Author(s):  
Steven Schreck ◽  
Rushyannah Killens-Cade ◽  
Amy Grunden
Keyword(s):  
Biofuel Production ◽  
Chromohalobacter Salexigens

scholarly journals Pretreatment of Switchgrass for Production of Glucose via Sulfonic Acid-Impregnated Activated Carbon

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 504
Author(s):  
Yane Ansanay ◽  
Praveen Kolar ◽  
Ratna Sharma-Shivappa ◽  
Jay Cheng ◽  
Consuelo Arellano
Keyword(s):  
Activated Carbon ◽  
Sulfonic Acid ◽  
Solid Acid ◽  
Methanesulfonic Acid ◽  
Biofuel Production ◽  
Acid Catalysts ◽  
Effects Of Temperature ◽  
Carbon Catalysts ◽  
Hydrolysis Of

In the present research, activated carbon-supported sulfonic acid catalysts were synthesized and tested as pretreatment agents for the conversion of switchgrass into glucose. The catalysts were synthesized by reacting sulfuric acid, methanesulfonic acid, and p-toluenesulfonic acid with activated carbon. The characterization of catalysts suggested an increase in surface acidities, while surface area and pore volumes decreased because of sulfonation. Batch experiments were performed in 125 mL serum bottles to investigate the effects of temperature (30, 60, and 90 °C), reaction time (90 and 120 min) on the yields of glucose. Enzymatic hydrolysis of pretreated switchgrass using Ctec2 yielded up to 57.13% glucose. Durability tests indicated that sulfonic solid-impregnated carbon catalysts were able to maintain activity even after three cycles. From the results obtained, the solid acid catalysts appear to serve as effective pretreatment agents and can potentially reduce the use of conventional liquid acids and bases in biomass-into-biofuel production.

scholarly journals Antiangiogenic potential of Jatropha curcas latex in the chick chorioallantoic membrane model

2019 ◽  
Vol 29 (1) ◽  
pp. 32157
Author(s):  
Luciane Madureira Almeida ◽  
Elisa Flávia Luiz Cardoso Bailão ◽  
Illana Reis Pereira ◽  
Fabrício Alves Ferreira ◽  
Patrícia Lima D'Abadia ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Jatropha Curcas ◽  
Physicochemical Characterization ◽  
Chorioallantoic Membrane ◽  
Angiogenesis Inhibitor ◽  
Negative Control ◽  
New Drugs ◽  
Membrane Model ◽  
Chick Chorioallantoic Membrane

AIMS: To perform a physicochemical and phytochemical characterization of Jatropha curcas latex and to investigate its antiangiogenic potential. METHODS: We performed an initial physicochemical characterization of J. curcas latex using thermal gravimetric analyses and Fourier Transform Infrared spectroscopy. After that, phenols, tannins and flavonoids were quantified. Finally, the potential of J. curcas latex to inhibit angiogenesis was evaluated using the chick chorioallantoic membrane model. Five groups of 20 fertilized chicken eggs each had the chorioallantoic membrane exposed to the following solutions: (1) water, negative control; (2) dexamethasone, angiogenesis inhibitor; (3) Regederm®, positive control; (4) 25% J. curcas latex diluted in water; (5) 50% J. curcas latex diluted in water; and (6) J. curcas crude latex. Analysis of the newly-formed vascular net was made through captured images and quantification of the number of pixels. Histological analyses were performed to evaluate the inflammation, neovascularization, and hyperemia parameters. The results were statically analyzed with a significance level set at p ˂0.05.RESULTS: Physicochemical characterization showed that J. curcas latex presented a low amount of cis-1.4-polyisoprene, which reduced its elasticity and thermal stability. Phytochemical analyses of J. curcas latex identified a substantial amount of phenols, tannins, and flavonoids (51.9%, 11.8%, and 0.07% respectively). Using a chick chorioallantoic membrane assay, we demonstrated the antiangiogenic potential of J. curcas latex. The latex induced a decrease in the vascularization of the membranes when compared with neutral and positive controls (water and Regederm®). However, when compared with the negative control (dexamethasone), higher J. curcas latex concentrations showed no significant differences.CONCLUSIONS: J. curcas latex showed low thermal stability, and consisted of phenols, tannins, and flavonoids, but little or no rubber. Moreover, this latex demonstrated a significant antiangiogenic activity on a chick chorioallantoic membrane model. The combination of antimutagenic, cytotoxic, antioxidant and antiangiogenic properties makes J. curcas latex a potential target for the development of new drugs.

scholarly journals Characterization of sugarcane (Saccharum spp.) leaf senescence: implications for biofuel production

2016 ◽  
Vol 9 (1) ◽  
Author(s):  
Maria Thereza Bazzo Martins ◽  
Wagner Rodrigo de Souza ◽  
Bárbara Andrade Dias Brito da Cunha ◽  
Marcos Fernando Basso ◽  
Nelson Geraldo de Oliveira ◽  
...  
Keyword(s):  
Leaf Senescence ◽  
Biofuel Production ◽  
Saccharum Spp

scholarly journals Partial Characterization of Protease from the Leaves of Jatropha curcas

2012 ◽  
Vol 4 (4) ◽  
Author(s):  
M. A. Ibrahim ◽  
J. O. Olatominwa ◽  
A. B. Aliyu ◽  
M. Bashir ◽  
A. B. Sallau
Keyword(s):  
Jatropha Curcas ◽  
Partial Characterization

scholarly journals Molecular Characterization of Jatropha curcas Resources and Identification of Population-Specific Markers

2011 ◽  
Vol 5 (1) ◽  
pp. 215-224 ◽  
Author(s):  
Anna Ricci ◽  
Konstantin Chekhovskiy ◽  
Perumal Azhaguvel ◽  
Emidio Albertini ◽  
Mario Falcinelli ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Jatropha Curcas

scholarly journals The Enrichment And Characterization Of Compost And Wastewater-Derived Microbial Cellulolytic Consortia For Biofuel Production

2021 ◽  
Author(s):  
Augustyna Dobosz
Keyword(s):  
Energy Demand ◽  
Defined Medium ◽  
Biofuel Production ◽  
Microbial Consortia ◽  
Extraction And Purification ◽  
End Products ◽  
Fermentative Activity ◽  
Incubation Temperatures ◽  
Current Energy

Over the last decade, a rise in energy demand and diminishing fuel resources have created a challenge for finding an alternative solution that could supplement our current energy sources. This study demonstrated that ethanol and other useful end-products can be produced from the fermentative activity of microbial consortia derived from cellulose-rich waste environments. Compost and wastewater were used as inoculum sources to enrich cellulolytic cultures at incubation temperatures 50 ºC and 60ºC. A chemically defined medium was used without complex nutrients such as yeast extract. Four cellulolytic cultures were obtained and their end-products were monitored over an active cellulose degrading period. The compost culture incubated at 50ºC produced the highest concentration of butyrate while the wastewater-derived culture incubated at 60ºC produced the highest ethanol concentration. Optimization of DNA extraction and purification from complex environmental samples such as the compost and wastewater cultures used in this study was also discussed.

scholarly journals Hope or hype: A critical assessment of Jatropha curcas for domestic biofuel production in Senegal

2021 ◽  
Author(s):  
◽  
David Campbell
Keyword(s):  
Case Studies ◽  
Jatropha Curcas ◽  
Energy Supply ◽  
Smallholder Farmers ◽  
Biofuel Production ◽  
Policy Framework ◽  
Mixed Method Research ◽  
Low Carbon ◽  
Plant Feedstock ◽  
Electrical Generation

<p>This thesis was designed to critically test the suitability of Jatropha curcas as a plant feedstock for liquid biofuel production in Senegal. Many countries around the globe have attempted to incorporate bioenergy into their broader energy supply mix, and liquid biofuels are a key component of a low-carbon economy to replace fossil fuels for transport and electrical generation. The Senegalese government instituted a national biofuel plan between 2007 and 2012 to achieve energy independence through biofuels with an annual production target of more than a billion liters of oil. The plan was intended to reduce problems with energy scarcity and price fluctuations, contribute to local economic growth, and expand agricultural production to degraded or otherwise fallow land. The project was largely unsuccessful, and to date there has been no significant oil production from Jatropha curcas for the national energy supply.  This research study was developed to understand the key barriers to the success of this program and mitigate the mistakes of future project developers and policymakers. Preliminary literature reviews and examples from similar endeavors in other countries suggested three main barriers that would be primary determinants of success or failure: the agronomic suitability, and therefore production and yield capacity, of Jatropha curcas to the Senegalese climate; the socio-economic challenges of integrating a broad national plan with smallholder farmers and assuring that the economics are fair for both growers and buyers; and the policy framework developed by government agencies, development organizations, and commercial interests to support an emergent biofuel industry. A mixed-method research design including document reviews, interviews and surveys, and case studies was employed to answer the key questions of why and how the Senegalese biofuel program has failed to achieve its intended goals.  Results from this study indicate that Jatropha curcas is unsuitable as a plant feedstock for liquid biofuels in Senegal at this time, due to significant shortcomings in all three key categories examined. The plant is vastly underproductive and requires considerable investment in scientific improvement of yield, pest tolerance and seed oil content; the economic gain is neither adequate to justify smallholder farmers to adopt it as an alternative to existing crops nor for project developers to generate income from fuel on the open market; and supporting policy has not been consistent or favorable enough to carry this emergent industry from nascence to maturity. There are, however, encouraging signs of resilience in two particular case studies that provide insight into how future programs could be structured, most notably in the Sine-Saloum Delta region. Further research should be devoted to specific economic schemes and innovative financing options for community focused biofuel programs.</p>

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