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Valoration Scales

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https://www.readbyqxmd.com/read/29214521/photo-and-electrochemical-valorization-of-carbon-dioxide-using-earth-abundant-molecular-catalysts
#1
REVIEW
Alonso Rosas-Hernández, Christoph Steinlechner, Henrik Junge, Matthias Beller
The dramatic increase in anthropogenic carbon dioxide emissions in recent decades has forced us to look for alternative carbon-neutral processes for the production of energy vectors and commodity chemicals. Photo- and electrochemical reduction of CO2 are appealing strategies for the storage of sustainable and intermittent energies in the form of chemical bonds of synthetic fuels and value-added molecules. In these approaches, carbon dioxide is converted to products such as CO, HCOOH and MeOH through proton-coupled electron transfer reactions...
December 6, 2017: Topics in Current Chemistry (Journal)
https://www.readbyqxmd.com/read/29169860/maize-cob-waste-pre-treatments-to-enhance-biogas-production-through-co-anaerobic-digestion-with-ofmsw
#2
Elena Surra, Maria Bernardo, Nuno Lapa, Isabel Esteves, Isabel Fonseca, José Paulo Mota
In the present work, the enhancement of biogas and methane yields through anaerobic co-digestion of the pre-hydrolised Organic Fraction of Municipal Solid Wastes (hOFMSW) and Maize Cob Wastes (MCW) in a lab-scale thermophilic anaerobic reactor was tested. In order to increase its biodegradability, MCW were submitted to an initial pre-treatment screening phase as follows: (i) microwave (MW) irradiation catalysed by NaOH, (ii) MW catalysed by glycerol in water and alkaline water solutions, (iii) MW catalysed by H2O2 with pH of 9...
November 20, 2017: Waste Management
https://www.readbyqxmd.com/read/29151888/enhancing-biogas-plant-production-using-pig-manure-and-corn-silage-by-adding-wheat-straw-processed-with-liquid-hot-water-and-steam-explosion
#3
Michał Gaworski, Sławomir Jabłoński, Izabela Pawlaczyk-Graja, Rafał Ziewiecki, Piotr Rutkowski, Anna Wieczyńska, Roman Gancarz, Marcin Łukaszewicz
Background: Pig manure utilization and valorization is an important topic with tightening regulations focused on ecological and safety issues. By itself pig manure is a poor substrate for biogas production because of its excessive nitrogen content relative to available organic carbon. Such substrate is alkaline, and methanogenesis can be suppressed, and so additional substrates with high organic carbon must be added. The most promising is straw, which is available from adjacent biogas plant cultures...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29132753/multi-product-microalgae-biorefineries-from-concept-towards-reality
#4
REVIEW
G P 't Lam, M H Vermuë, M H M Eppink, R H Wijffels, C van den Berg
Although microalgae are a promising biobased feedstock, industrial scale production is still far off. To enhance the economic viability of large-scale microalgae processes, all biomass components need to be valorized, requiring a multi-product biorefinery. However, this concept is still too expensive. Typically, downstream processing of industrial biotechnological bulk products accounts for 20-40% of the total production costs, while for a microalgae multi-product biorefinery the costs are substantially higher (50-60%)...
November 10, 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/29125663/biocatalytic-oxidative-cascade-for-the-conversion-of-fatty-acids-to-alpha-ketoacids-via-internal-h2o2-recycling
#5
Somayyeh Gandomkar, Alexander Dennig, Andela Dordic, Lucas Hammerer, Mathias Pickl, Thomas Haas, Mélanie Hall, Kurt Faber
The functionalization of bio-based chemicals is essential to allow valorization of natural carbon sources. An atom-efficient biocatalytic oxidative cascade was developed for the conversion of saturated fatty acids to alpha-ketoacids. Employment of P450 monooxygenase in the peroxygenase mode for regioselective alpha-hydroxylation of fatty acids combined with enantioselective oxidation by alpha-hydroxyacid oxidase(s) resulted in internal recycling of the oxidant H2O2, thus minimizing degradation of ketoacid product and maximizing biocatalyst lifetime...
November 10, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29121935/bioconversion-of-distillers-grains-hydrolysates-to-advanced-biofuels-by-an-escherichia-coli-co-culture
#6
Fang Liu, Weihua Wu, Mary B Tran-Gyamfi, James D Jaryenneh, Xun Zhuang, Ryan W Davis
BACKGROUND: First generation bioethanol production utilizes the starch fraction of maize, which accounts for approximately 60% of the ash-free dry weight of the grain. Scale-up of this technology for fuels applications has resulted in a massive supply of distillers' grains with solubles (DGS) coproduct, which is rich in cellulosic polysaccharides and protein. It was surmised that DGS would be rapidly adopted for animal feed applications, however, this has not been observed based on inconsistency of the product stream and other logistics-related risks, especially toxigenic contaminants...
November 9, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28869788/biocatalytic-valorization-of-furans-opportunities-for-inherently-unstable-substrates
#7
Pablo Dominguez de Maria, Nadia V Guajardo
Biogenic furans (Furfural and 5-hydroxymethylfurfural) are expected to become relevant building blocks based on their high functionalization and versatility. However, the inherent instability of furans poses considerable challenges for their synthetic modifications. Valorization routes of furans typically generate by-products, impurities, wastes, and a cumbersome downstream processing, compromising their ecological footprint. Biocatalysis may become an alternative, given the high selectivity of enzymes, together with the mild reaction conditions applied...
September 4, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28832708/resilience-of-the-health-team-in-caring-for-people-with-mental-disorders-in-a-psychiatric-hospital
#8
Débora Felippe Brolese, Greice Lessa, José Luís Guedes Dos Santos, Jucimara da Silva Mendes, Kamylla Santos da Cunha, Jeferson Rodrigues
OBJECTIVE: Evaluating and understanding the resilience process of the health team in caring for people with mental disorders in a psychiatric hospital. METHOD: A mixed-method study with concomitant triangulation of data from a cross-sectional study, with health professionals, and Grounded Theory in the data. Quantitative data were collected using the Resilience Scale and analyzed using descriptive and inferential statistics. Qualitative data were obtained from interviews and analyzed using initial and focused coding...
August 17, 2017: Revista da Escola de Enfermagem da U S P
https://www.readbyqxmd.com/read/28793127/development-and-validation-of-the-hospitality-axiological-scale-for-humanization-of-nursing-care
#9
José María Galán González-Serna, Soledad Ferreras-Mencia, Juan Manuel Arribas-Marín
Objective: to develop and validate a scale to evaluate nursing attitudes in relation to hospitality for the humanization of nursing care. Participants: the sample consisted of 499 nursing professionals and undergraduate students of the final two years of the Bachelor of Science in Nursing program. Method: the instrument has been developed and validated to evaluate the ethical values related to hospitality using a methodological approach. Subsequently, a model was developed to measure the dimensions forming the construct hospitality...
August 3, 2017: Revista Latino-americana de Enfermagem
https://www.readbyqxmd.com/read/28793107/association-between-filial-responsibility-when-caring-for-parents-and-the-caregivers-overload
#10
Marinês Aires, Duane Mocellin, Fernanda Laís Fengler, Idiane Rosset, Naiana Oliveira Dos Santos, Diani de Oliveira Machado, Carolina Baltar Day, Lisiane Manganelli Girardi Paskulin
Objective: To analyze the association between filial responsibility and the overload of the children when caring for their older parents. Method: Cross-sectional study with 100 caregiver children of older adults. Filial liability was assessed by the attitudes of the responsible child (scale of expectation and filial duty) and by care behaviors (assistance in activities of daily living, emotional and financial support, and keeping company). The overload was assessed by the Caregiver Burden Inventory...
July 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28767911/test-retest-reliability-of-brazilian-version-of-memorial-symptom-assessment-scale-for-assessing-symptoms-in-cancer-patients
#11
Josiane Roberta de Menezes, Bianca Maria Oliveira Luvisaro, Claudia Fernandes Rodrigues, Camila Drumond Muzi, Raphael Mendonça Guimarães
Objective: To assess the test-retest reliability of the Memorial Symptom Assessment Scale translated and culturally adapted into Brazilian Portuguese. Methods: The scale was applied in an interview format for 190 patients with various cancers type hospitalized in clinical and surgical sectors of the Instituto Nacional de Câncer José de Alencar Gomes da Silva and reapplied in 58 patients. Data from the test-retest were double typed into a Microsoft Excel spreadsheet and analyzed by the weighted Kappa...
April 2017: Einstein
https://www.readbyqxmd.com/read/28743564/evolving-biocatalysis-to-meet-bioeconomy-challenges-and-opportunities
#12
REVIEW
Alessandro Pellis, Sara Cantone, Cynthia Ebert, Lucia Gardossi
The unique selectivity of enzymes, along with their remarkable catalytic activity, constitute powerful tools for transforming renewable feedstock and also for adding value to an array of building blocks and monomers produced by the emerging bio-based chemistry sector. Although some relevant biotransformations run at the ton scale demonstrate the success of biocatalysis in industry, there is still a huge untapped potential of catalytic activities available for targeted valorization of new raw materials, such as waste streams and CO2...
July 22, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28725268/towards-microalgal-triglycerides-in-the-commodity-markets
#13
Giulia Benvenuti, Jesús Ruiz, Packo P Lamers, Rouke Bosma, René H Wijffels, Maria J Barbosa
BACKGROUND: Microalgal triglycerides (TAGs) hold great promise as sustainable feedstock for commodity industries. However, to determine research priorities and support business decisions, solid techno-economic studies are essential. Here, we present a techno-economic analysis of two-step TAG production (growth reactors are operated in continuous mode such that multiple batch-operated stress reactors are inoculated and harvested sequentially) for a 100-ha plant in southern Spain using vertically stacked tubular photobioreactors...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28681129/simultaneous-production-of-intracellular-triacylglycerols-and-extracellular-polyol-esters-of-fatty-acids-by-rhodotorula-babjevae-and-rhodotorula-aff-paludigena
#14
Luis A Garay, Irnayuli R Sitepu, Tomas Cajka, Erin Cathcart, Oliver Fiehn, J Bruce German, David E Block, Kyria L Boundy-Mills
Microbial oils have been analyzed as alternatives to petroleum. However, just a handful of microbes have been successfully adapted to produce chemicals that can compete with their petroleum counterparts. One of the reasons behind the low success rate is the overall economic inefficiency of valorizing a single product. This study presents a lab-scale analysis of two yeast species that simultaneously produce multiple high-value bioproducts: intracellular triacylglycerols (TG) and extracellular polyol esters of fatty acids (PEFA), two lipid classes with immediate applications in the biofuels and surfactant industries...
July 5, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28635998/heterogeneous-catalytic-hydrogenation-of-co2-by-metal-oxides-defect-engineering-perfecting-imperfection
#15
Jia Jia, Chenxi Qian, Yuchan Dong, Young Feng Li, Hong Wang, Mireille Ghoussoub, Keith T Butler, Aron Walsh, Geoffrey A Ozin
Metal oxides with their myriad compositions, structures and bonding exhibit an incredibly diverse range of properties. It is however the defects in metal oxides that endow them with a variety of functions and it is the ability to chemically tailor the type, population and distribution of defects on the surface and in the bulk of metal oxides that delivers utility in different applications. In this Tutorial Review, we discuss how metal oxides with designed defects can be synthesized and engineered, to enable heterogeneous catalytic hydrogenation of gaseous carbon dioxide to chemicals and fuels...
July 31, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28614438/pressure-ulcer-dressings-in-critical-patients-a-cost-analysis
#16
Dinara Raquel Araújo Silva, Sandra Marina Gonçalves Bezerra, Jéssica Pereira Costa, Maria Helena Barros Araújo Luz, Vanessa Caminha Aguiar Lopes, Lidya Tolstenko Nogueira
OBJECTIVE: To assess the direct cost of dressings in pressure ulcer treatment. METHOD: This was a descriptive observational study conducted at an intensive care unit in the Northeast region of Brazil, between November and December 2015. Data were gathered using the Pressure Ulcer Scale for Healing and a form to characterize and assess costs. Values in Brazilian reais (BRL) were converted into U.S. dollars at the exchange rate of USD 0.26/BRL. Univariate and bivariate analyses were conducted...
June 12, 2017: Revista da Escola de Enfermagem da U S P
https://www.readbyqxmd.com/read/28614431/factors-associated-with-the-risk-of-fall-in-adults-in-the-postoperative-period-a-cross-sectional-study
#17
Luciana Regina Ferreira da Mata, Cissa Azevedo, Aryanne Gabrielle Policarpo, Juliano Teixeira Moraes
Objective: to assess the factors associated with the risk of fall in patients undergoing surgical procedures. Method: quantitative and cross-sectional study carried out with 257 adult patients in a hospital in the state of Minas Gerais, Brazil. Data were collected using the sociodemographic and clinical questionnaire, the Morse Fall Scale, and the Quality of Recovery Score. Data were submitted to descriptive statistical analysis and multinomial logistic regression...
June 8, 2017: Revista Latino-americana de Enfermagem
https://www.readbyqxmd.com/read/28589227/laccase-mediated-synthesis-of-lignin-core-hyperbranched-copolymers
#18
Mark D Cannatelli, Arthur J Ragauskas
Lignin, one of the major chemical constituents of woody biomass, is the second most abundant biopolymer found in nature. The pulp and paper industry has long produced lignin on the scale of millions of tons annually as a by-product of the pulping process, and the dawn of cellulosic ethanol production has further contributed to this amount. Historically, lignin has been perceived as a waste material and burned as a fuel for the pulping process. However, recent research has been geared toward developing cost-effective technologies to convert lignin into valuable commodities...
June 6, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28583405/pre-aeration-of-food-waste-to-augment-acidogenic-process-at-higher-organic-load-valorizing-biohydrogen-volatile-fatty-acids-and-biohythane
#19
Omprakash Sarkar, S Venkata Mohan
Application of pre-aeration (AS) to waste prior to feeding was evaluated on acidogenic process in a semi-pilot scale biosystem for the production of biobased products (biohydrogen, volatile fatty acids (VFA) and biohythane) from food waste. Oxygen assisted in pre-hydrolysis of waste along with the suppression of methanogenic activity resulting in enhanced acidogenic product formation. AS operation resulted in 97% improvement in hydrogen conversion efficiency (HCE) and 10% more VFA production than the control...
October 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28569443/europium-oxybromide-catalysts-for-efficient-bromine-looping-in-natural-gas-valorization
#20
Vladimir Paunović, Ronghe Lin, Matthias Scharfe, Amol P Amrute, Sharon Mitchell, Roland Hauert, Javier Pérez-Ramírez
The industrialization of bromine-mediated natural gas upgrading is contingent on the ability to fully recycle hydrogen bromide (HBr), which is the end form of the halogen after the activation and coupling of the alkanes. Europium oxybromide (EuOBr) is introduced as a unique catalytic material to close the bromine loop via HBr oxidation, permitting low-temperature operation and long lifetimes with a stoichiometric feed (O2 :HBr=0.25)-conditions at which any catalyst reported to date severely deactivates because of excessive bromination...
June 1, 2017: Angewandte Chemie
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