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https://www.readbyqxmd.com/read/29040857/synergistic-effects-of-anaerobic-co-digestion-of-whey-manure-and-fish-ensilage
#1
Vivekanand Vivekanand, Daniel Girma Mulat, Vincent G H Eijsink, Svein J Horn
Biogas production potential of the three feedstocks fish ensilage, manure and whey was evaluated using biochemical methane potential (BMP) tests. Since anaerobic digestion of single substrates may be inefficient due to imbalances in the carbon-nitrogen ratio, degree of biodegradability and/or due to lack of nutrients needed by the microbial community, co-digestion of these substrates was also assessed, revealing synergistic effects and a particularly good effect of combining manure with fish ensilage. In this latter case, methane yields were up to 84% higher than the weighted average of the methane yields obtained with the individual substrates...
September 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29040474/co-occurrence-of-genes-for-aerobic-and-anaerobic-biodegradation-of-dichloroethane-in-organochlorine-contaminated-groundwater
#2
Jacob E Munro, Önder Kimyon, Deborah J Rich, Joanna Koenig, Sihui Tang, Adrian Low, Matthew Lee, Mike Manefield, Nicholas V Coleman
1,2-dichloroethane (DCA) is a problematic groundwater pollutant. Factors influencing the distribution and activities of DCA-degrading bacteria are not well-understood, which has hampered their application for bioremediation. Here, we used quantitative PCR (qPCR) to investigate the distribution of putative DCA-dehalogenating bacteria at a DCA-impacted site in Sydney (Australia). The dehalogenase genes dhlA, tceA and bvcA were detected in all groundwater samples (n = 15), while vcrA was found in 11/15 samples...
October 12, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29040011/bioactive-edible-films-for-food-applications-influence-of-the-bioactive-compounds-on-film-structure-and-properties
#3
Nasreddine Benbettaïeb, Thomas Karbowiak, Frédéric Debeaufort
Nowadays, a new generation of edible films is being especially designed for incorporating antimicrobials, antioxidants, enzymes or functional ingredients. Edible films made from natural biopolymers become the focus of many research works as an alternative to synthetic food packaging due to their edibility, biodegradability and compostability as well as to their use as active packaging. Active compounds incorporated in edible films could protect foods against deterioration during storage and therefore extend their shelf life...
October 17, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29039988/the-intraoperative-use-of-polydioxanone-foil-to-reduce-the-risk-of-sino-orbital-fistula-formation-in-orbital-exenteration
#4
Aws Al-Hity, Maria Elena Gregory, Ewan G Kemp
BACKGROUND: Orbital exenteration is a radical surgical procedure resulting in deformity. It involves removal of the globe, optic nerve, extra-ocular muscles, orbital fat, lacrimal gland, and peri-osteum. Sino-orbital fistula (SOF) formation is a common documented post-operative complication, usually connecting the orbit and the ethmoid sinus. SOFs can cause leaks of serous fluid, and act as an entry site for pathogens into the orbit leading to socket infection and breakdown. METHODS: This retrospective study analyzed exenterations performed over a 22-year period (1993-2015) at the National Ocular Oncology Service Centre for Scotland...
October 17, 2017: Orbit
https://www.readbyqxmd.com/read/29036695/identifying-greener-and-safer-plasticizers-a-4-step-approach
#5
Océane Albert, Thomas C Nardelli, Barbara F Hales, Bernard Robaire
The health and economic burden of endocrine disrupting chemicals, such as the plasticizer di(2-ethylhexyl) phthalate (DEHP), is prompting industry to develop alternatives. However, the absence of requirements for manufacturers to ensure the safety of these alternatives has led to the generation of replacements that may have similar or worse effects than the original chemicals. Consequently, there is increasing recognition by scientists, regulators and industry that proactive approaches are needed to develop safe chemical substitutes...
August 2, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29035714/biodegradation-of-triclosan-in-diatom-navicula-sp-kinetics-transformation-products-toxicity-evaluation-and-the-effects-of-ph-and-potassium-permanganate
#6
Tengda Ding, Kunde Lin, Mengting Yang, Lianjun Bao, Juying Li, Bo Yang, Jay Gan
Triclosan (TCS) is one of the most widely used pharmaceutically active compounds and frequently detected in treated wastewater and the impacted aquatic environment. However, the fate and toxicity of TCS in aquatic organisms is poorly known, including in particular the potential for the formation of incomplete biological transformation products. In this study, TCS posed high toxic effects (e.g., growth inhibition and damage of photosynthesis) to typical freshwater diatom Navicula sp., with the 24h and 72h EC50 values of 173...
September 21, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29035373/molecular-afterglow-imaging-with-bright-biodegradable-polymer-nanoparticles
#7
Qingqing Miao, Chen Xie, Xu Zhen, Yan Lyu, Hongwei Duan, Xiaogang Liu, Jesse V Jokerst, Kanyi Pu
Afterglow optical agents, which emit light long after cessation of excitation, hold promise for ultrasensitive in vivo imaging because they eliminate tissue autofluorescence. However, afterglow imaging has been limited by its reliance on inorganic nanoparticles with relatively low brightness and short-near-infrared (NIR) emission. Here we present semiconducting polymer nanoparticles (SPNs) <40 nm in diameter that store photon energy via chemical defects and emit long-NIR afterglow luminescence at 780 nm with a half-life of ∼6 min...
October 16, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/29035351/rebalancing-%C3%AE-amyloid-induced-decrease-of-atp-level-by-amorphous-nano-micro-polyphosphate-suppression-of-the-neurotoxic-effect-of-amyloid-%C3%AE-protein-fragment-25-35
#8
Werner E G Müller, Shunfeng Wang, Maximilian Ackermann, Meik Neufurth, Renate Steffen, Egherta Mecja, Rafael Muñoz-Espí, Qingling Feng, Heinz C Schröder, Xiaohong Wang
Morbus Alzheimer neuropathology is characterized by an impaired energy homeostasis of brain tissue. We present an approach towards a potential therapy of Alzheimer disease based on the high-energy polymer inorganic polyphosphate (polyP), which physiologically occurs both in the extracellular and in the intracellular space. Rat pheochromocytoma (PC) 12 cells, as well as rat primary cortical neurons were exposed to the Alzheimer peptide Aβ25-35. They were incubated in vitro with polyphosphate (polyP); ortho-phosphate was used as a control...
October 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29034126/development-and-characterization-of-methylene-blue-oleate-salt-loaded-polymeric-nanoparticles-and-their-potential-application-as-a-treatment-for-glioblastoma
#9
J M Castañeda-Gill, A P Ranjan, J K Vishwanatha
Glioblastoma (GBM) is an aggressive, grade IV brain tumor that develops from astrocytes located within the cerebrum, resulting in poor prognosis and survival rates following an accepted treatment regimen of surgery, radiation, and temozolomide. Thus, development of new therapeutics is necessary. During the last two decades, methylene blue (MB) has received increased attention as a potential neurotherapeutic due to its duality in brain cancers and neurodegenerative diseases. While MB is capable of easily permeating the blood-brain barrier, its therapeutic concentrations in GBM are known to induce off-target cytotoxicity and thus, another mode of drug delivery must be considered...
August 2017: Journal of Nanomedicine & Nanotechnology
https://www.readbyqxmd.com/read/29033909/benzene-and-naphthalene-degrading-bacterial-communities-in-an-oil-sands-tailings-pond
#10
Fauziah F Rochman, Andriy Sheremet, Ivica Tamas, Alireza Saidi-Mehrabad, Joong-Jae Kim, Xiaoli Dong, Christoph W Sensen, Lisa M Gieg, Peter F Dunfield
Oil sands process-affected water (OSPW), produced by surface-mining of oil sands in Canada, is alkaline and contains high concentrations of salts, metals, naphthenic acids, and polycyclic aromatic compounds (PAHs). Residual hydrocarbon biodegradation occurs naturally, but little is known about the hydrocarbon-degrading microbial communities present in OSPW. In this study, aerobic oxidation of benzene and naphthalene in the surface layer of an oil sands tailings pond were measured. The potential oxidation rates were 4...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29033836/delivery-of-antioxidant-and-anti-inflammatory-agents-for-tissue-engineered-vascular-grafts
#11
REVIEW
Kenyatta S Washington, Chris A Bashur
The treatment of patients with severe coronary and peripheral artery disease represents a significant clinical need, especially for those patients that require a bypass graft and do not have viable veins for autologous grafting. Tissue engineering is being investigated to generate an alternative graft. While tissue engineering requires surgical intervention, the release of pharmacological agents is also an important part of many tissue engineering strategies. Delivery of these agents offers the potential to overcome the major concerns for graft patency and viability...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29033134/biochemical-methane-potential-bmp-tests-reducing-test-time-by-early-parameter-estimation
#12
C Da Silva, S Astals, M Peces, J L Campos, L Guerrero
Biochemical methane potential (BMP) test is a key analytical technique to assess the implementation and optimisation of anaerobic biotechnologies. However, this technique is characterised by long testing times (from 20 to >100days), which is not suitable for waste utilities, consulting companies or plants operators whose decision-making processes cannot be held for such a long time. This study develops a statistically robust mathematical strategy using sensitivity functions for early prediction of BMP first-order model parameters, i...
October 12, 2017: Waste Management
https://www.readbyqxmd.com/read/29032742/enhanced-cyanide-biodegradation-by-immobilized-crude-extract-of-rhodococcus-ukmp-5m
#13
Maegala Nallapan Maniyam, Abdul Latif Ibrahim, Anthony E G Cass
The crude extract of Rhodococcus UKMP-5M demonstrated excellent cyanide-degrading ability as reported previously. In the present study, the capability of the crude extract of the locally isolated bacterium was further enhanced by adopting the technology of immobilization. Among the matrices screened to encapsulate the crude extract, gellan gum emerged as the most suitable immobilization material exhibiting cyanide-degrading activity of 0.475(a) ± 0.003 mM/min/mg protein which exceeded the activity of cyanide-degrading enzyme by 61% and 361% in comparison to alginate carrier and non-immobilized crude extract, respectively...
October 14, 2017: Environmental Technology
https://www.readbyqxmd.com/read/29032329/successful-transdermal-allergen-delivery-and-allergen-specific-immunotherapy-using-biodegradable-microneedle-patches
#14
Ji Hye Kim, Jung U Shin, Seo Hyeong Kim, Ji Yeon Noh, Hye Ran Kim, Jungsoo Lee, Howard Chu, Kyoung Yong Jeong, Kyung Hee Park, Jung Dong Kim, Hong Kee Kim, Do Hyeon Jeong, Tai-Soon Yong, Jung-Won Park, Kwang Hoon Lee
Allergen-specific immunotherapy (SIT) is an effective treatment modality for allergic diseases such as atopic dermatitis (AD). However, frequent visits over a 3-year period as well as looming adverse events tend to discourage patient compliance. Therefore, a more convenient, effective, and safe method of SIT is needed. For several decades, use of microneedles has been promoted as an efficient and precise transdermal drug delivery method. In this study, we developed Dermatophagoides farinae (D. farinae) extract (DfE)-loaded microneedle patches, and evaluated their safety and efficacy as a novel SIT method...
October 4, 2017: Biomaterials
https://www.readbyqxmd.com/read/29032257/hetero-catalytic-hydrothermal-oxidation-of-simulated-pulping-effluent-effect-of-operating-parameters-and-catalyst-stability
#15
Bholu Ram Yadav, Anurag Garg
In the present study, activated carbon (AC) supported bi-metallic catalyst (3.3Cu/2.2Ce/4.4AC) was subjected to catalytic wet oxidation (CWO) of simulated pulping effluent at moderate operating conditions (temperatures = 120-190 °C and oxygen partial pressures = 0.5-1.2 MPa). The oxidation reaction was performed in a high pressure reactor (capacity = 0.7 l) with catalyst concentration of 1-5 g/l for 3 h duration. During CWO at 190 °C temperature and 0.9 MPa oxygen pressure, the chemical oxygen demand (COD), total organic carbon (TOC), lignin and color removals from the wastewater were 79%, 77%, 88% and 89%, respectively, while the wastewater biodegradability was enhanced to 0...
October 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/29031952/antitumor-efficacy-and-toxicity-of-5-fu-loaded-plga-pellets
#16
Nattawut Leelakanok, Sean M Geary, Aliasger K Salem
The aim of this study was to formulate a biodegradable implant capable of imparting local anti-tumor activity through the sustained release of the chemotherapeutic agent, 5-fluorouracil (5-FU). Thus injectable pellets (< 1.2 mm diameter) made from poly(lactide co-glycolide (PLGA) and loaded with 5-FU at varying drug:polymer ratios were fabricated using hot-melt extrusion and tested for their ability to provide sustained release of 5-FU in in vitro and in vivo settings. In addition, these formulations were compared against soluble 5-FU for their antitumor activity in vivo as well as for their toxicity...
October 12, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29031304/coupling-of-the-ring-oven-based-preconcentration-technique-and-surface-enhanced-raman-spectroscopy-application-for-the-determination-of-purine-bases-in-dna
#17
Javier E L Villa, Celio Pasquini, Ronei J Poppi
In this paper, we present the advantages and limitations of the coupling of a ring-oven-based preconcentration technique and surface-enhanced Raman spectroscopy (SERS). Three different methods to promote analyte adsorption on gold nanoparticles using crystal violet as a probe molecule were assessed. The results showed significant improvements in sampling process, selectivity, sensitivity, repeatability (less than ± 10%), and detection limits (nanomolar level) using a sample volume as small as 300 μL. Finally, the standard addition method was successfully applied to the quantitative SERS detection of adenine and guanine in calf thymus DNA after ring-oven preconcentration with a calculated value of (G + C)/(A + T) close to the literature value...
October 23, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29031210/effect-of-photoactivated-riboflavin-on-the-biodegradation-resistance-of-root-dentin-collagen
#18
Balasankar Meera Priyadarshini, Thong Beng Lu, Amr S Fawzy
This study was conducted to evaluate the effect of UVA-activated 1% riboflavin solution on structural integrity; mechanical properties and stability; and collagenase-mediated collagen solubilisation resistance of demineralized root dentin collagen matrix. Root dentin specimens demineralized with 17% EDTA for 7days were treated with 1% RF for 1min followed by UVA photo-activation at intensity 7mW/cm(2) for 1min. Control specimens were completely devoid of riboflavin and/or UVA treatments. Specimens were challenged with bacterial collagenase type-I solution for different time-periods at 37°C...
October 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29031188/azithromycin-sorption-and-biodegradation-in-a-simulated-california-river-system
#19
Monica L Vermillion Maier, Ronald S Tjeerdema
Azithromycin (AZ) is a widely-used macrolide antibiotic that is continually deposited into natural waterways by sewage effluent. Though recognized as an emerging contaminant of concern, little is known about its fate and transport in aquatic systems. American River soils and water were used to determine degradation of AZ in microcosms simulating flooded (anaerobic) and non-flooded (aerobic) California watershed conditions. Under aerobic conditions the degradation rate constant (k=0.0084 ± 0.0039 day(-1)) and DT50 (82...
October 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/29031115/decolorization-and-detoxification-of-dye-mixture-and-textile-effluent-by-lichen-dermatocarpon-vellereceum-in-fixed-bed-upflow-bioreactor-with-subsequent-oxidative-stress-study
#20
Ashwini N Kulkarni, Anuprita D Watharkar, Niraj R Rane, Byong-Hun Jeon, Sanjay P Govindwar
Navy Blue HE22 (NBHE22), dye mixture and real textile effluent were decolorized and degraded by lichen Dermatocarpon vellereceum. Up-flow bioreactor showed about 80%, 70%, 80% and 65% removal of American dye manufacturer index (ADMI), biological oxygen demand (BOD), total suspended solids (TSS) and total dissolved solids (TDS), respectively of dye mixture at flow rate of 25mlh(-1). The removal of ADMI, BOD, TSS and TDS of real textile effluent were 75%, 65%, 82% and 70%, respectively at flow rate of 30mlh(-1)...
October 10, 2017: Ecotoxicology and Environmental Safety
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