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https://www.readbyqxmd.com/read/28725268/towards-microalgal-triglycerides-in-the-commodity-markets
#1
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
#2
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
#3
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...
June 21, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28614438/pressure-ulcer-dressings-in-critical-patients-a-cost-analysis
#4
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
#5
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
#6
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
#7
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...
May 18, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28569443/europium-oxybromide-catalysts-for-efficient-bromine-looping-in-natural-gas-valorization
#8
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 due to excessive bromination...
June 1, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28562790/validation-of-an-instrument-regarding-nursing-intervention-in-patients-in-vasoactive-therapy
#9
Ane Elisa Paim, Eliane Regina Pereira do Nascimento, Kátia Cilene Godinho Bertoncello, Karla Gomes Sifroni, Nadia Chiodelli Salum, Keyla Cristiane do Nascimento
Objective: to validate the content of a Standard Operational Procedure, regarding nursing interventions in emergency patients treated with vasoactive drugs. Method: methodological study, carried out from December 2015 to January 2016. Content validity was determined by 16 experts (13 nurses, 2 pharmacists and one biomedical scientist), who judged it through a four-point Likert scale. The items were evaluated in terms of: feasibility, objectivity, simplicity, clearness, pertinence and accuracy...
May 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28562741/self-efficacy-scale-for-the-establishment-of-good-relationships-with-families-in-neonatal-and-pediatric-hospital-settings
#10
Andréia Cascaes Cruz, Margareth Angelo, Bernardo Pereira Dos Santos
OBJECTIVE: The purpose of this study was to develop and test the psychometric properties of the Self-efficacy Scale for the Establishment of Good Relationships with Families in Neonatal and Pediatric Hospital Settings. METHOD: Methodological study grounded on self-efficacy theory was conducted in three phases: conceptual and operational definition (review of the literature and interviews with the target population), content validity (opinion of five experts e three clinical nurses), and exploratory factor analysis and internal consistency reliability (cross-sectional survey with a valid sample of 194 nurses)...
May 25, 2017: Revista da Escola de Enfermagem da U S P
https://www.readbyqxmd.com/read/28492739/relationship-between-resting-heart-rate-blood-pressure-and-pulse-pressure-in-adolescents
#11
Diego Giulliano Destro Christofaro, Juliano Casonatto, Luiz Carlos Marques Vanderlei, Gabriel Grizzo Cucato, Raphael Mendes Ritti Dias
Background: High resting heart rate is considered an important factor for increasing mortality chance in adults. However, it remains unclear whether the observed associations would remain after adjustment for confounders in adolescents. Objectives: To analyze the relationship between resting heart rate, blood pressure and pulse pressure in adolescents of both sexes. Methods: A cross-sectional study with 1231 adolescents (716 girls and 515 boys) aged 14-17 years...
May 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28469708/integrated-systems-for-biopolymers-and-bioenergy-production-from-organic-waste-and-by-products-a-review-of-microbial-processes
#12
REVIEW
Giorgia Pagliano, Valeria Ventorino, Antonio Panico, Olimpia Pepe
Recently, issues concerning the sustainable and harmless disposal of organic solid waste have generated interest in microbial biotechnologies aimed at converting waste materials into bioenergy and biomaterials, thus contributing to a reduction in economic dependence on fossil fuels. To valorize biomass, waste materials derived from agriculture, food processing factories, and municipal organic waste can be used to produce biopolymers, such as biohydrogen and biogas, through different microbial processes. In fact, different bacterial strains can synthesize biopolymers to convert waste materials into valuable intracellular (e...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28355337/translation-cross-cultural-adaptation-and-validation-of-the-diabetes-empowerment-scale-short-form
#13
Fernanda Figueredo Chaves, Ilka Afonso Reis, Adriana Silvina Pagano, Heloísa de Carvalho Torres
OBJECTIVE: To translate, cross-culturally adapt and validate the Diabetes Empowerment Scale - Short Form for assessment of psychosocial self-efficacy in diabetes care within the Brazilian cultural context. METHODS: Assessment of the instrument's conceptual equivalence, as well as its translation and cross-cultural adaptation were performed following international standards. The Expert Committee's assessment of the translated version was conducted through a web questionnaire developed and applied via the web tool e-Surv...
March 23, 2017: Revista de Saúde Pública
https://www.readbyqxmd.com/read/28214720/treatment-efficiency-and-economic-feasibility-of-biological-oxidation-membrane-filtration-and-separation-processes-and-advanced-oxidation-for-the-purification-and-valorization-of-olive-mill-wastewater
#14
L Ioannou-Ttofa, I Michael-Kordatou, S C Fattas, A Eusebio, B Ribeiro, M Rusan, A R B Amer, S Zuraiqi, M Waismand, C Linder, Z Wiesman, J Gilron, D Fatta-Kassinos
Olive mill wastewater (OMW) is a major waste stream resulting from numerous operations that occur during the production stages of olive oil. The resulting effluent contains various organic and inorganic contaminants and its environmental impact can be notable. The present work aims at investigating the efficiency of (i) jet-loop reactor with ultrafiltration (UF) membrane system (Jacto.MBR), (ii) solar photo-Fenton oxidation after coagulation/flocculation pre-treatment and (iii) integrated membrane filtration processes (i...
May 1, 2017: Water Research
https://www.readbyqxmd.com/read/28199921/pilot-scale-bioconversion-of-rice-and-sunflower-agro-residues-into-medicinal-mushrooms-and-laccase-enzymes-through-solid-state-fermentation-with-ganoderma-lucidum
#15
P D Postemsky, M A Bidegain, R González-Matute, N D Figlas, M A Cubitto
Solid-state fermentation was evaluated at the pilot-scale for the bioconversion and valorization of rice husks and straw (RSH), or sunflower seed hulls (SSH), into medicinal mushrooms and crude extracts, with laccase activity. The average mushroom yield was 56kg dry weight per ton of agro-residues. Laccase activity in crude aqueous extracts showed its maximum value of 10,927Ukg(-1) in RSH (day 10, Exudate phase) and 16,442Ukg(-1) in SSH (day 5, Full colonization phase), the activity at the Residual substrate phase being 511Ukg(-1) in RSH and 803Ukg(-1) in SSH, respectively...
May 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28163129/biotransformation-of-lignocellulosic-materials-into-value-added-products-a-review
#16
REVIEW
Muhammad Bilal, Muhammad Asgher, Hafiz M N Iqbal, Hongbo Hu, Xuehong Zhang
In the past decade, with the key biotechnological advancements, lignocellulosic materials have gained a particular importance. In serious consideration of global economic, environmental and energy issues, research scientists have been re-directing their interests in (re)-valorizing naturally occurring lignocellulosic-based materials. In this context, lignin-modifying enzymes (LMEs) have gained considerable attention in numerous industrial and biotechnological processes. However, their lower catalytic efficiencies and operational stabilities limit their practical and multipurpose applications in various sectors...
May 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28159727/a-p-coumaroyl-esterase-from-rhizoctonia-solani-with-a-pronounced-chlorogenic-acid-esterase-activity
#17
Annabel Nieter, Sebastian Kelle, Diana Linke, Ralf G Berger
Extracellular esterase activity was detected in submerged cultures of Rhizoctonia solani grown in the presence of sugar beet pectin or Tween 80. Putative type B feruloyl esterase (FAE) coding sequences found in the genome data of the basidiomycete were heterologously expressed in Pichia pastoris. Recombinant enzyme production on the 5-L bioreactor scale (Rs pCAE: 3245UL(-1)) exceeded the productivity of the wild type strain by a factor of 800. Based on substrate specificity profiling, the purified recombinant Rs pCAE was classified as a p-coumaroyl esterase (pCAE) with a pronounced chlorogenic acid esterase side activity...
July 25, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28146182/confirmatory-factor-analysis-of-the-appraisal-of-self-care-agency-scale-revised
#18
Thaís Santos Guerra Stacciarini, Ana Emilia Pace
Objective: to analyze the factor structure of the Appraisal of Self-Care Agency Scale-Revised (ASAS-R), adapted for Brazil. Method: methodological study conducted with 150 individuals with diabetes mellitus cared for by the Family Health Strategy, most of whom are elderly with low educational levels. The test of the hypothesis concerning the confirmatory factor composition of the ASAS-R was performed using latent variables structural equations. Results: the model's goodness-of-fit indexes were satisfactory (χ2 = 259...
January 30, 2017: Revista Latino-americana de Enfermagem
https://www.readbyqxmd.com/read/28076595/short-version-of-the-depression-anxiety-stress-scale-21-is-it-valid-for-brazilian-adolescents
#19
Hítalo Andrade da Silva, Muana Hiandra Pereira Dos Passos, Valéria Mayaly Alves de Oliveira, Aline Cabral Palmeira, Ana Carolina Rodarti Pitangui, Rodrigo Cappato de Araújo
Objective: To evaluate the interday reproducibility, agreement and validity of the construct of short version of the Depression Anxiety Stress Scale-21 applied to adolescents. Methods: The sample consisted of adolescents of both sexes, aged between 10 and 19 years, who were recruited from schools and sports centers. The validity of the construct was performed by exploratory factor analysis, and reliability was calculated for each construct using the intraclass correlation coefficient, standard error of measurement and the minimum detectable change...
October 2016: Einstein
https://www.readbyqxmd.com/read/27956329/valorization-of-crude-glycerol-and-eggshell-biowaste-as-media-components-for-hydrogen-production-a-scale-up-study-using-co-culture-system
#20
Vinayak Laxman Pachapur, Ratul Kumar Das, Satinder Kaur Brar, Yann Le Bihan, Gerardo Buelna
The properties of eggshells (EGS) as neutralizing and immobilizing agent were investigated for hydrogen (H2) production using crude glycerol (CG) by co-culture system. Eggshells of different sizes and concentrations were used during batch and repeated-batch fermentation. For batch and repeated-batch fermentation, the maximum H2 production (36.53±0.53 and 41.16±0.95mmol/L, respectively) was obtained with the EGS size of 33μm<x5<75μm. Hydrogen production increased with the decreasing size of EGS. Eggshells maintained the fermentation pH (6...
February 2017: Bioresource Technology
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