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https://www.readbyqxmd.com/read/28334693/fabrication-of-human-hair-keratin-jellyfish-collagen-eggshell-derived-hydroxyapatite-osteoinductive-biocomposite-scaffolds-for-bone-tissue-engineering-from-waste-to-regenerative-medicine-products
#1
Yavuz Emre Arslan, Tugba Sezgin Arslan, Burak Derkus, Emel Emregul, Kaan C Emregul
In the present study, we aimed at fabricating an osteoinductive biocomposite scaffold using keratin obtained from human hair, jellyfish collagen and eggshell-derived nano-sized spherical hydroxyapatite (nHA) for bone tissue engineering applications. Keratin, collagen and nHA were characterized with the modified Lowry method, free-sulfhydryl groups and hydroxyproline content analysis, sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR) and thermal gravimetric analysis (TGA) which confirmed the success of the extraction and/or isolation processes...
March 18, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28334677/centralized-management-of-sewage-sludge-and-agro-industrial-waste-through-co-composting
#2
M C Gutiérrez, A Serrano, J A Siles, A F Chica, M A Martín
In this research study, the co-composting process of a waste mixture containing strawberry extrudate, fish waste, sewage sludge and bulking agent (SEFW, 190:1:22:90 ratio) was carried out in a dynamic-solid respirometer at pilot scale. The aerobic biodegradability of the mixture was previously ensured in a static-liquid respirometer. The advantages and drawbacks of the SEFW co-composting process were subsequently identified through the determination of respirometric activity and the physical-chemical characterization of the waste, as well as the monitoring of odor emissions...
March 20, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28334620/supercritical-water-oxidation-of-oil-based-drill-cuttings
#3
Zhong Chen, Zeliang Chen, Fengjun Yin, Guangwei Wang, Hongzhen Chen, Chunlan He, Yuanjian Xu
Oil-based drill cuttings (OBDC) are a typical hazardous solid waste that arises from drilling operations in oil and gas fields. The supercritical water oxidation (SCWO) of OBDC was comprehensively investigated in a batch reactor under the conditions of various oxygen coefficients (OC, 1.5-3.5), temperatures (T, 400-500°C) and reaction times (t, 0.5-10min). Preheating experiments indicated that most of the organic compounds in the initial OBDC sample were distributed within gaseous, oil, aqueous and solid phases, with no more than 9...
March 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28334283/the-microbiology-of-oil-sands-tailings-past-present-future
#4
Julia M Foght, Lisa M Gieg, Tariq Siddique
Surface mining of enormous oil sands deposits in northeastern Alberta, Canada since 1967 has contributed greatly to Canada's economy but has also received negative international attention due largely to environmental concerns and challenges. Not only have microbes profoundly affected the composition and behaviour of this petroleum resource over geological time, they currently influence the management of semi-solid tailings in oil sands tailing ponds (OSTP) and tailings reclamation. Historically, microbial impacts on OSTP were generally discounted but next-generation sequencing and biogeochemical studies have revealed unexpectedly diverse indigenous communities and expanded our fundamental understanding of anaerobic microbial functions...
March 9, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28333579/anaerobic-digestion-of-thermal-alkaline-pretreated-cephalosporin-bacterial-residues-for-methane-production
#5
Guixia Li, Weizhang Zhong, Rui Wang, Jiaqi Chen, Zaixing Li
Optimum anaerobic conditions of ephalosporin bacterial residues after thermal-alkaline pretreatment were determined by orthogonal experiments. And through biochemical methane potential tests (BMPs) for cephalosporin bacterial residues, the ability for bacterial degradation of cephalosporin was also evaluated. The thermal-alkaline pretreatment with the optimum values of 6% NaOH at 105°C for 15 min significantly improved digestion performance. With the thermal-alkaline pretreatment, the specific methane yield of the pretreated cephalosporin bacterial residue increased by 254...
March 23, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28333214/-forever-young-%C3%A2-testosterone-replacement-therapy-a-blockbuster-drug-despite-flabby-evidence-and-broken-promises
#6
Andrea Busnelli, Edgardo Somigliana, Paolo Vercellini
In the last decade, testosterone replacement therapy (TRT) has been increasingly prescribed to treat a controversial condition known as 'late-onset hypogonadism (LOH)'. This syndrome is diagnosed in men who, for no discernible reason other than older age, obesity or ill health have serum testosterone concentrations below the normal range for healthy young men and report one or more of the following symptoms: muscle weakness or wasting, mood, behaviour and cognition-related symptoms and sexual function or libido impairment...
February 23, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28333092/impact-of-coagulant-and-flocculant-addition-to-an-anaerobic-dynamic-membrane-bioreactor-andmbr-treating-waste-activated-sludge
#7
Guido Kooijman, Wilton Lopes, Zhongbo Zhou, Hongxiao Guo, Merle de Kreuk, Henri Spanjers, Jules van Lier
In this work, we investigated the effects of flocculation aid (FA) addition to an anaerobic dynamic membrane bioreactor (AnDMBR) (7 L, 35 °C) treating waste-activated sludge (WAS). The experiment consisted of three distinct periods. In period 1 (day 1-86), the reactor was operated as a conventional anaerobic digester with a solids retention time (SRT) and hydraulic retention time (HRT) of 24 days. In period 2 (day 86-303), the HRT was lowered to 18 days with the application of a dynamic membrane while the SRT was kept the same...
March 23, 2017: Membranes
https://www.readbyqxmd.com/read/28333067/optimal-waste-load-allocation-using-graph-model-for-conflict-resolution
#8
Leila Saberi, Mohammad Hossein Niksokhan
In this paper, a new methodology is proposed for waste load allocation in river systems using the decision support system (DSS) for the graph model for conflict resolution II (GMCRII), multi-criteria decision making (MCDM) analysis and the Multi-Objective Particle Swarm Optimization (MOPSO) algorithm. Minimization of total treatment and penalty costs and minimization of biological oxygen demand violation of standards at the check point are considered as the main objectives of this study. At first, the water quality along the river was simulated using the Streeter-Phelps (S-P) equation coupled with the MOPSO model...
March 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28333066/phosphorus-removal-from-aqueous-solution-using-a-novel-granular-material-developed-from-building-waste
#9
Shengjiong Yang, Pengkang Jin, Xiaochang C Wang, Qionghua Zhang, Xiaotian Chen
In this study, a granular material (GM) developed from building waste was used for phosphate removal from phosphorus-containing wastewater. Batch experiments were executed to investigate the phosphate removal capacity of this material. The mechanism of removal proved to be a chemical precipitation process. The characteristics of the material and resulting precipitates, the kinetics of the precipitation and Ca(2+) liberation processes, and the effects of dosage and pH were investigated. The phosphate precipitation and Ca(2+) liberation processes were both well described by a pseudo-second-order kinetic model...
March 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28333045/the-manureecomine-pilot-installation-advanced-integration-of-technologies-for-the-management-of-organics-and-nutrients-in-livestock-waste
#10
Cristina Pintucci, Marta Carballa, Sam Varga, Jimena Sarli, Lai Peng, Johannes Bousek, Chiara Pedizzi, Maël Ruscalleda, Elena Tarragó, Delphine Prat, Giovanni Colica, Merijn Picavet, Joop Colsen, Oscar Benito, Marilos Balaguer, Sebastià Puig, Juan M Lema, Jesús Colprim, Werner Fuchs, Siegfried E Vlaeminck
Manure represents an exquisite mining opportunity for nutrient recovery (nitrogen and phosphorus), and for their reuse as renewable fertilisers. The ManureEcoMine proposes an integrated approach of technologies, operated in a pilot-scale installation treating swine manure (83.7%) and Ecofrit(®) (16.3%), a mix of vegetable residues. Thermophilic anaerobic digestion was performed for 150 days, the final organic loading rate was 4.6 kgCOD m(-3) d(-1), with a biogas production rate of 1.4 Nm(3) m(-3) d(-1). The digester was coupled to an ammonia side-stream stripping column and a scrubbing unit for free ammonia inhibition reduction in the digester, and nitrogen recovery as ammonium sulphate...
March 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28332819/a-path-to-impact-for-autonomous-field-deployable-chemical-sensors-a-case-study-of-in-situ-nitrite-sensors
#11
Tim M Schierenbeck, Matthew C Smith
Natural freshwater systems have been severely affected by excess loading of macronutrients (e.g., nitrogen and phosphorous) from fertilizers, fossil fuels, and human and livestock waste. In the USA, impacts to drinking water quality, biogeochemical cycles, and aquatic ecosystems are estimated to cost US$210 billion annually. Field-deployable nutrient sensors (FDS) offer potential to support research and resource management efforts by acquiring higher resolution data than are currently supported by expensive conventional sampling methods...
March 23, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28331956/enzyme-assisted-supercritical-fluid-extraction-an-alternative-and-green-technology-for-non-extractable-polyphenols
#12
Muhammad Mushtaq, Bushra Sultana, Sumia Akram, Farooq Anwar, Ahmad Adnan, Syed S H Rizvi
This contribution proposes an enzyme-assisted eco-friendly process for the extraction of non-extractable polyphenols (NEPPs) from black tea leftover (BTLO), an underutilized tea waste. BTLO hydrolyzed with various enzyme formulations was extracted using supercritical carbon dioxide and ethanol as co-solvent (SC-CO2 + EtOH). A conventional solvent extraction (CSE) was performed using EtOH + H2O (80:20, v/v) for comparison purposes. The results revealed that hydrolysis of BTLO with 2.9% (w/w) kemzyme at 45 °C and pH 5...
March 22, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28331544/vapor-fed-bio-hybrid-fuel-cell
#13
Marcus S Benyamin, Justin P Jahnke, David M Mackie
BACKGROUND: Concentration and purification of ethanol and other biofuels from fermentations are energy-intensive processes, with amplified costs at smaller scales. To circumvent the need for these processes, and to potentially reduce transportation costs as well, we have previously investigated bio-hybrid fuel cells (FCs), in which a fermentation and FC are closely coupled. However, long-term operation requires strictly preventing the fermentation and FC from harming each other. We introduce here the concept of the vapor-fed bio-hybrid FC as a means of continuously extracting power from ongoing fermentations at ambient conditions...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28331353/undernutrition-and-associated-factors-among-24-36-month-old-children-in-slum-areas-of-bahir-dar-city-ethiopia
#14
Yeshalem Mulugeta Demilew, Dagninet Derebe Abie
BACKGROUND: This study aimed to assess undernutrition and associated factors among 24-36-month-old children in the slum areas of Bahir Dar city. METHODS: A community-based cross-sectional study was conducted among 480 children from May 1 to 26, 2015. The simple random sampling technique was used to select respondents. Data were collected using a structured interviewer-administered questionnaire. Statistical Package for Social Sciences version 20 was used for analysis...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/28330812/molecular-evidence-for-differential-long-term-outcomes-of-early-life-severe-acute-malnutrition
#15
Allan Sheppard, Sherry Ngo, Xiaoling Li, Michael Boyne, Debbie Thompson, Anthony Pleasants, Peter Gluckman, Terrence Forrester
BACKGROUND: Severe acute malnutrition (SAM) in infants may present as one of two distinct syndromic forms: non-edematous (marasmus), with severe wasting and no nutritional edema; or edematous (kwashiorkor) with moderately severe wasting. These differences may be related to developmental changes prior to the exposure to SAM and phenotypic changes appear to persist into adulthood with differences between the two groups. We examined whether the different response to SAM and subsequent trajectories may be explained by developmentally-induced epigenetic differences...
March 8, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28330630/the-prevalence-of-undernutrition-upon-hospitalization-in-children-in-a-developing-country-a-single-hospital-study-from-malaysia
#16
Way-Seah Lee, Zulfadly Ahmad
BACKGROUND: Undernourished children who require hospital care have a longer duration of hospitalization and respond poorly to modern medical therapy. The objective of the present study was to ascertain the nutritional status of children admitted to a pediatric tertiary center in Malaysia and the risk factors leading to undernutrition upon admission. METHODS: In this cross-sectional, hospital-based study, anthropometric measurements [weight, length/height, mid-upper arm circumference (MUAC), triceps skinfold thickness were performed in 285 children aged from 3 months to 15 years who were admitted to University Malaya Medical Centre, Kuala Lumpur in November 2013...
February 17, 2017: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/28330328/optimization-of-phytase-production-from-potato-waste-using-aspergillus-ficuum
#17
Mengmeng Tian, Qiuyan Yuan
Solid-state fermentation (SSF) can divert food waste from landfills and produce high-value products. This study was aimed to investigate the feasibility of using SSF and optimize the conditions of production of phytase by Aspergillus ficuum from potato waste. Different parameters including pH of the potato waste, inoculum level, moisture content, incubation period, temperature, and supplementary nitrogen and carbon sources were evaluated. The results indicated that pH, inoculum level, and moisture content did not significantly vary phytase production...
December 2016: 3 Biotech
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
#18
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/28330303/bio-prospecting-of-cuttle-fish-waste-and-cow-dung-for-the-production-of-fibrinolytic-enzyme-from-bacillus-cereus-ind5-in-solid-state-fermentation
#19
Gurupatham Devadhasan Biji, Arumugaperumal Arun, Eswaran Muthulakshmi, Ponnuswamy Vijayaraghavan, Mariadhas Valan Arasu, Naif Abdullah Al-Dhabi
The process parameters governing the production of fibrinolytic enzyme in solid state fermentation employing Bacillus cereus IND5 and using cuttle fish waste and cow dung substrate were optimized. The pH value of the medium, moisture content, sucrose, casein and magnesium sulfate were considered for two-level full factorial design and pH, casein and magnesium sulfate were identified as the important factors for fibrinolytic enzyme production. Central composite design was applied to investigate the interactive effect among variables (pH, casein and magnesium sulfate) and response surface plots were created to find the pinnacle of process response...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330285/screening-production-optimization-and-characterization-of-%C3%AE-glucosidase-using-microbes-from-shellfish-waste
#20
Samhita Mahapatra, A S Vickram, T B Sridharan, R Parameswari, M Ramesh Pathy
An extracellular β-glucosidase was isolated from Proteus mirabilis VIT117 found to be growing on prawn shells. The enzyme production was found to be enhanced (14.58 U/ml) when the culture was maintained at pH 9 and provided with sorbitol as carbon source, yeast extract as nitrogen source and incubated at 37 °C for approximately 72 h. Statistical methods like Plackett-Burman and RSM were also applied here to study the effects of different combinations of growth parameters for the bacteria, where the most significant parameters were found to be inoculum size, pH, yeast extract, incubation time and sorbitol...
December 2016: 3 Biotech
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