Read by QxMD icon Read


Amit, Rajesh Chandra, Uttam Kumar Ghosh, Jagdeep Kumar Nayak
Marine microalga Tetraselmis indica (T. indica) was cultivated in secondary treated domestic sewage (STDS) in batch mode. Optimization studies showed that after 14 days of cultivation period, highest biomass yield reached was 0.88 ± 0.04 g/L at the optimum temperature of 27 ± 1 °C and light intensity of 135 μmol m(-2) s(-1). T. indica removed about 60.93% phosphate, 78.46% nitrate, 72.94% chemical oxygen demand (COD), 73.17% biological oxygen demand (BOD), 98.90% total dissolved solids (TDS) and heavy metals (83...
July 18, 2017: Environmental Science and Pollution Research International
Emanoella L Soares, Magda L B Lima, José R S Nascimento, Arlete A Soares, Ítalo A C Coutinho, Francisco A P Campos
This work provides a detailed histological analysis of the development of Jatropha curcas seeds, together with an assessment of the role of programmed cell death in this process. Seeds of Jatropha curcas are a potential source of raw material for the production of biodiesel, but very little is known about how the architecture of the seeds is shaped by the coordinated development of the embryo, endosperm and maternal tissues, namely integuments and nucellus. This study used standard anatomical and ultrastructural techniques to evaluate seed development and programmed cell death (PCD) in the inner integument was monitored by qPCR...
July 18, 2017: Plant Cell Reports
Ana Maria Salazar-Bryam, Roberta Barros Lovaglio, Jonas Contiero
This study focused on two important aspects of the upstream process: the appropriate use of crude glycerol as a low-cost carbon source, and strain selection. The effect of different crude glycerol concentrations on rhamnolipid biosynthesis by two Pseudomonas aeruginosa strains (wild type LBI and mutant LBI 2A1) was studied. Finally, the synthesized rhamnolipids were characterized by mass spectrometry. When both strains were compared, 50 g/L was the most favorable concentration for both, but P. aeruginosa LBI 2A1 showed an increase in rhamnolipid production (2...
June 2017: Heliyon
Sandro Froehner, Juan Sánez, Luiz Fernando Dombroski, Maria Paula Gracioto
Biodiesel for combustible engine is available as mixture of fossil diesel and fatty esters obtained by transesterification of vegetable oils. The use of biodiesel reduces the amount of SOx, mainly. However, it was already observed that biodiesel has a different behavior in environment in cases of accidental spill and groundwater contamination. It was noticed that the biodegradation of hydrocarbons (cyclic and aliphatic) in the presence of biodiesel are speeded, although the mechanism is still unclear. Considering the chemical structure of fatty esters, it was investigated the formation of aggregates in water solution by fatty esters present in commercial biodiesel...
July 17, 2017: Environmental Science and Pollution Research International
Qingshi Tu, Matthew J Eckelman, Julie B Zimmerman
Algae biodiesel (BioD) and renewable diesel (RD) have been recognized as potential solutions to mitigate fossil fuel consumption and the associated environmental issues. Life cycle assessment (LCA) has been used by many researchers to evaluate the potential environmental impacts of these algae-derived fuels yielding a wide range of results, in some cases even differing on indicating if these fuels are preferred to petroleum-derived or not. This meta-analysis reviews the methodological preferences and results for energy consumption, greenhouse gas emissions and water consumption for 54 LCA studies that considered algae BioD and RD...
July 17, 2017: Environmental Science & Technology
Xinni Xiong, Iris K M Yu, Leichang Cao, Daniel C W Tsang, Shicheng Zhang, Yong Sik Ok
This review addresses the use of biochar as a green and versatile catalyst support for emerging high-end applications beyond soil remediation, including chemical synthesis and biodiesel production from biomass, and pollutant degradation in the environment. Their catalytic performances are comparable or even superior to the conventional resin-, silica-, or carbon-based catalysts, owing to the favourable intrinsic features of biochar (various functional groups, intricate network of structures, etc.). Yet, distinctive active sites are needed for different applications...
July 3, 2017: Bioresource Technology
Albert Canet, M Dolors Benaiges, Francisco Valero, Patrick Adlercreutz
The alcoholysis of triolein was used to explore the specific features of a recombinant Rhizopus oryzae lipase (rROL) for biodiesel synthesis. For this purpose, different acylglycerols were compared as substrates in lipase-catalysed transesterification. rROL was shown to exhibit a higher specificity towards 1-monoolein than triolein compared to other R. oryzae lipases, being more than 4-fold more specific; in contrast, rROL did not accept 2-monoolein as substrate, concluding that it is highly 1,3-positional specific...
July 12, 2017: New Biotechnology
R L de Oliveira, G G P de Carvalho, R L Oliveira, M S L Tosto, E M Santos, R D X Ribeiro, T M Silva, B R Correia, L M A de Rufino
The objective of this study was to evaluate the effects of the inclusion of palm kernel (Elaeis guineensis) cake in diets for goats on feeding behaviors, rectal temperature, and cardiac and respiratory frequencies. Forty crossbred Boer male, non-castrated goats (ten animals per treatment), with an average age of 90 days and an initial body weight of 15.01 ± 1.76 kg, were used. The goats were fed Tifton 85 (Cynodon spp.) hay and palm kernel supplemented at the rates of 0, 7, 14, and 21% of dry matter (DM)...
July 9, 2017: Tropical Animal Health and Production
Xiang-Yuan Deng, Kun Gao, Ren-Chuan Zhang, Min Addy, Qian Lu, Hong-Yan Ren, Paul Chen, Yu-Huan Liu, Roger Ruan
Liquid swine manure was subjected to thermophilic anaerobic digestion, ammonia stripping and centrifugation in order to increase the available carbon sources and decrease the ammonia concentration and turbidity. Chlorella vulgaris (UTEX 2714) was grown on minimally diluted (2×, 3× and 4×) autoclaved and non-autoclaved pretreated anaerobic digestion swine manure (PADSM) in a batch-culture system for 7days. Results showed that C. vulgaris (UTEX 2714) grew best on 3× PADSM media, and effectively removed NH4(+)-N, TN, TP and COD by 98...
June 26, 2017: Bioresource Technology
Thalles A Andrade, Massimiliano Errico, Knud V Christensen
The identification of the influence of the reaction parameters is of paramount importance when defining a process design. In this work, non-edible castor oil was reacted with methanol to produce a possible component for biodiesel blends, using liquid enzymes as the catalyst. Temperature, alcohol-to-oil molar ratio, enzyme and added water contents were the reaction parameters evaluated in the transesterification reactions. The optimal conditions, giving the optimal final FAME yield and FFA content in the methyl ester-phase was identified...
June 23, 2017: Bioresource Technology
Mukesh Saini, Ze Win Wang, Chung-Jen Chiang, Yun-Peng Chao
BACKGROUND: Crude glycerol in the waste stream of the biodiesel production process is an abundant and renewable resource. However, the glycerol-based industry is usually afflicted by the cost for refinement of crude glycerol. This issue can be addressed by developing a microbial process to convert crude glycerol to value-added chemicals. In this study, Escherichia coli was implemented for the production of n-butanol based on the reduced nature of glycerol. RESULTS: The central metabolism of E...
2017: Biotechnology for Biofuels
Indika Thushari, Sandhya Babel
In this study, an inexpensive, environmental benign acid catalyst is prepared using coconut meal residue (CMR) and employed for biodiesel production from waste palm oil (WPO). The total acid density of the catalyst is found to be 3.8mmolg(-1). The catalyst shows a unique amorphous structure with 1.33m(2)g(-1) of surface area and 0.31cm(3)g(-1) of mean pore volume. Successful activation is confirmed by Fourier transform infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The highest biodiesel yield of 92...
June 23, 2017: Bioresource Technology
A R Castro, M Guimarães, J V Oliveira, M A Pereira
This work demonstrates that cork used as oil-spill sorbents, contaminated with liquid hydrocarbons, herein demonstrated with hexadecane, can be biologically treated by Rhodococcus opacus B4 with concomitant lipids production. R. opacus B4 consumed up to 96% of hexadecane (C16) impregnated in natural and regranulated cork sorbents after 48h incubation, producing 0.59±0.06g of triacylglycerol (TAG) g(-1) of C16 consumed with a TAG content of 0.60±0.06gg(-1) of cellular dry weight (CDW) and 0.54±0.05g TAG g(-1) of C16 consumed with a TAG content of 0...
July 1, 2017: Science of the Total Environment
Anna Lankoff, Kamil Brzoska, Joanna Czarnocka, Magdalena Kowalska, Halina Lisowska, Remigiusz Mruk, Johan Øvrevik, Aneta Wegierek-Ciuk, Mariusz Zuberek, Marcin Kruszewski
Biodiesels represent more carbon-neutral fuels and are introduced at an increasing extent to reduce emission of greenhouse gases. However, the potential impact of different types and blend concentrations of biodiesel on the toxicity of diesel engine emissions are still relatively scarce and to some extent contradictory. The objective of the present work was to compare the toxicity of diesel exhaust particles (DEP) from combustion of two 1st-generation fuels: 7% fatty acid methyl esters (FAME; B7) and 20% FAME (B20) and a 2nd-generation 20% FAME/HVO (synthetic hydrocarbon biofuel (SHB)) fuel...
July 3, 2017: Environmental Science and Pollution Research International
Raghu K Moorthy, M Premalatha, Muthu Arumugam
Microalga is the only feedstock that has the theoretical potential to completely replace the energy requirements derived from fossil fuels. However, commercialization of this potential source for fuel applications is hampered due to many technical challenges with harvesting of biomass being the most energy intensive process among them. The fresh water microalgal species, Scenedesmus abundans, has been widely recognized as a potential feedstock for production of biodiesel (Mandotra et al., 2014). The present work deals with sedimentation of algal biomass using extracted chitosan and natural bentonite clay powder as flocculant...
2017: Frontiers in Chemistry
Yu S Dzyazko, L M Rozhdestvenska, S L Vasilyuk, K O Kudelko, V N Belyakov
Composite membranes were obtained by modification of heterogeneous polymer cation and anion-exchange membranes with nanoparticles of zirconium hydrophosphate and hydrated zirconium dioxide, respectively. The ion-exchange materials were investigated with the methods of electron microscopy, potentiometry, voltammetry, and impedance spectroscopy. Single nanoparticles, which were precipitated in aqueous media, form aggregates, when the composites are in a contact with polar organic solvent. Both single nanoparticles (up to 10 nm) and their aggregates (up to 200 nm) were precipitated in ion-exchange polymers in glycerol media...
December 2017: Nanoscale Research Letters
Shengping You, Qingdian Yin, Jianye Zhang, Chengyu Zhang, Wei Qi, Lan Gao, Zhiping Tao, Rongxin Su, Zhimin He
Farnesene has been identified as suitable jet fuel substitutes and metabolic engineering for microbial production of farnesene is an alternative and attractive route. In this study, due to accumulation of toxic intermediate isopentenyl pyrophosphate (IPP), an engineered Escherichia coli strain harboring heterologous mevalonate pathway produced only 4.11mg/L β-farnesene. Through higher-level expression of isopentenyl diphosphate isomerase and farnesyl diphosphate synthase to minimize the accumulated IPP, another engineered strain with relatively balanced mevalonate pathway was constructed and had the highest production of β-farnesene to date (8...
June 13, 2017: Bioresource Technology
Camila S Carriço, Thaís Fraga, Vagner E Carvalho, Vânya M D Pasa
Rigid polyurethane foams were synthesized using a renewable polyol from the simple physical mixture of castor oil and crude glycerol. The effect of the catalyst (DBTDL) content and blowing agents in the foams' properties were evaluated. The use of physical blowing agents (cyclopentane and n-pentane) allowed foams with smaller cells to be obtained in comparison with the foams produced with a chemical blowing agent (water). The increase of the water content caused a decrease in density, thermal conductivity, compressive strength, and Young's modulus, which indicates that the increment of CO₂ production contributes to the formation of larger cells...
July 2, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Vishal Anand, Puneet Kumar Singh, Chiranjib Banerjee, Pratyoosh Shukla
Biofuels are the promising sources which are produced by various microalgae or in the form of metabolic by-products from organic or food waste products. Microalgae have been widely reported for the production of biofuels since these have a high storage of lipids as triacylglycerides, which can mainly be converted into biofuels. Recently, products such as biodiesel, bioethanol and biogas have renewed the interest toward the microalgae. The proteomics alone will not pave the way toward finding an ideal alga which will fulfill the current energy demands, but a combined approach of proteomics, genomics and bioinformatics can be pivotal for a sustainable solution...
July 2017: 3 Biotech
Shui-Jen Chen, Jen-Hsiung Tsai, Guo-Ping Chang-Chien, Kuo-Lin Huang, Lin-Chi Wang, Wen-Yinn Lin, Chih-Chung Lin, C Kuei-Jyum Yeh
Few studies have been performed up to now on the emission factors and congener profiles of persistent organic pollutants (POPs) emitted from off-road diesel engines. This investigation elucidates the emission factors and congener profiles of various POPs, namely polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyl (PCBs), polybrominated dibenzo-p-dioxins and polybrominated dibenzofurans (PBDD/Fs) and polybrominated diphenyl ethers (PBDEs), in the exhausts of a diesel generator fueled with different waste cooking oil-based biodiesel (WCO-based biodiesel) blends...
June 22, 2017: Journal of Hazardous Materials
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"