keyword
MENU ▼
Read by QxMD icon Read
search

anaerobes

keyword
https://www.readbyqxmd.com/read/29783195/performance-of-a-biotrickling-filter-for-the-anaerobic-utilization-of-gas-phase-methanol-coupled-to-thiosulphate-reduction-and-resource-recovery-through-volatile-fatty-acids-production
#1
Tejaswini Eregowda, Luck Matanhike, Eldon R Rene, Piet N L Lens
The anaerobic removal of continuously fed gas-phase methanol (2.5-30 g/m3 .h) and the reduction of step-fed thiosulphate (1000 mg/L) was investigated in a biotrickling filter (BTF) operated for 123 d at an empty bed residence time (EBRT) of 4.6 and 2.3 min. The BTF performance during steady step-feed and special operational phases like intermittent liquid trickling in 6 and 24 h cycles and operation without pH regulation were evaluated. Performance of the BTF was not affected and nearly 100% removal of gas-phase methanol was achieved with an ECmax of 21 g/m3 ...
April 25, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29783194/quantitative-investigation-of-hydraulic-mixing-energy-input-during-batch-mode-anaerobic-digestion-and-its-impact-on-performance
#2
James McLeod, Z Othman, Rajarathinam Parthasarathy
The relationship between mixing energy input and biogas production was investigated by anaerobically digesting sewage sludge in lab scale, hydraulically mixed, batch mode digesters at six different specific energy inputs. The goal was to identify how mixing energy influenced digestion performance at quantitative levels to help explain the varying results in other published works. The results showed that digester homogeneity was largely uninfluenced by energy input, whereas cumulative biogas production and solids destruction were...
May 18, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29783170/impact-of-long-term-salinity-exposure-in-anaerobic-membrane-bioreactors-treating-phenolic-wastewater-performance-robustness-and-endured-microbial-community
#3
Julian D Muñoz Sierra, Margreet J Oosterkamp, Wei Wang, Henri Spanjers, Jules B van Lier
Industrial wastewaters are becoming increasingly associated with extreme conditions such as the presence of refractory compounds and high salinity that adversely affect biomass retention or reduce biological activity. Hence, this study evaluated the impact of long-term salinity increase to 20 gNa+ .L-1 on the bioconversion performance and microbial community composition in anaerobic membrane bioreactors treating phenolic wastewater. Phenol removal efficiency of up to 99.9% was achieved at 14 gNa+ .L-1 . Phenol conversion rates of 5...
May 7, 2018: Water Research
https://www.readbyqxmd.com/read/29783131/effect-of-trace-element-addition-and-increasing-organic-loading-rates-on-the-anaerobic-digestion-of-cattle-slaughterhouse-wastewater
#4
Thomas Schmidt, Bernadette K McCabe, Peter W Harris, Seonmi Lee
In this study, anaerobic digestion of slaughterhouse wastewater with the addition of trace elements was monitored for biogas quantity, quality and process stability using CSTR digesters operated at mesophilic temperature. The determination of trace element concentrations was shown to be deficient in Fe, Ni, Co, Mn and Mo compared to recommendations given in the literature. Addition of these trace elements resulted in enhanced degradation efficiency, higher biogas production and improved process stability. Higher organic loading rates and lower hydraulic retention times were achieved in comparison to the control digesters...
May 18, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29783130/an-explanation-of-the-methanogenic-pathway-for-methane-production-in-anaerobic-digestion-of-nitrogen-rich-materials-under-mesophilic-and-thermophilic-conditions
#5
Dong-Min Yin, Maria Westerholm, Wei Qiao, Shao-Jie Bi, Simon M Wandera, Run Fan, Meng-Meng Jiang, Ren-Jie Dong
The impact of temperature on the anaerobic digestion of chicken manure was investigated by studying the process performance and pathway for continuously-fed digesters under mesophilic and thermophilic conditions. The mesophilic digester obtained a 15% higher methane yield compared with the thermophilic digester. Mesophilic and thermophilic digester had free ammonia of 31 and 145 mg/L, respectively. The stable carbon isotope analysis indicated that 41% and 50% of acetate was converted to methane through the syntrophic acetate oxidation and hydrogenotrophic methanogenesis (SAO-HM) pathway under mesophilic and thermophilic conditions, respectively...
May 18, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29783053/biomineralization-mechanism-of-u-vi-induced-by-bacillus-cereus-12-2-the-role-of-functional-groups-and-enzymes
#6
Jian Zhang, Han Song, Zhi Chen, Shasha Liu, Yali Wei, Jingyi Huang, Chuling Guo, Zhi Dang, Zhang Lin
Current studies reveal that the biomineralization of U(VI) by anaerobes normally produces nano-sized U(IV) minerals that can easily re-migrate/re-oxidize, while the biomineralization of U(VI) by aerobes has been constrained because the general mechanism has not yet been fully characterized. The biomineralization of U(VI) by Bacillus cereus 12-2 was investigated in this work. The maximum biosorption capability of intact cells was 448.68 mg U/g biomass (dry weight) at pH 5, while a decrease over 60% was induced when phosphate, amino, and especially carboxyl groups were shielded...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29782813/actinomycotic-osteomyelitis-of-the-mandible-diagnosed-using-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-a-case-report
#7
Shinsuke Yamamoto, Hiroshi Takegawa, Naoki Taniike, Toshihiko Takenobu
Actinomycosis is a rare, chronic, slowly progressive granulomatous disease caused by filamentous gram-positive anaerobic bacteria from the Actinomycetaceae family (genus Actinomyces). It has become a rare condition because of the widespread use of antibiotics. When clinical symptoms are not typical, diagnosis of this condition becomes difficult. This report describes a case involving an 82-year-old woman who was diagnosed with actinomycotic osteomyelitis of the mandible using matrix assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS)...
April 26, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29782790/magnetite-triggering-enhanced-diet-a-scavenger-for-the-blockage-of-electron-transfer-in-anaerobic-digestion-of-high-solids-sewage-sludge
#8
Tao Wang, Dong Zhang, Lingling Dai, Bin Dong, Xiaohu Dai
At present, high-solids anaerobic digestion of sewage sludge has drawn great attention due to the superiority of its small land area footprint and low energy consumption. However, a high organic loading rate may cause acids accumulation and ammonia inhibition, thus leading to an inhibited pseudo-steady state in which electron transfer through interspecies hydrogen transfer (IHT) between acetogens and methanogens is blocked. In this study, adding 50 mg/g TS (total solid) magnetite clearly reduced the accumulation of short-chain fatty acids and accelerated methane production by 26...
May 21, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29782303/clindamycin-induced-maculopapular-exanthema-with-preferential-involvement-of-striae-distensae-a-koebner-phenomenon
#9
Benigno Monteagudo, Miguel Cabanillas, Pilar Iriarte, Aquilina Ramírez-Santos, Elvira León-Muinos, Daniel González-Vilas, Óscar Suárez-Amor
Clindamycin is a lincomycin-derived antibiotic useful for the treatment of anaerobic and Gram-positive aerobic bacterial infections. Cutaneous adverse reactions are usually maculopapular exanthemas, although hypersensitivity syndrome, acute generalized exanthematous pustulosis, and Stevens-Johnson syndrome have also been reported (1). We report the case of a patient with a maculopapular rash triggered by clindamycin who developed cutaneous lesions on striae distensae (SD). A 47-year-old woman was referred to our clinic for pruritic cutaneous lesions which had started 6 days earlier...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29780974/metformin-targets-glucose-metabolism-in-triple-negative-breast-cancer
#10
R S Wahdan-Alaswad, S M Edgerton, H S Salem, A D Thor
Metformin is the most widely administered anti-diabetic agent worldwide. In patients receiving metformin for metabolic syndrome or diabetes, it reduces the incidence and improves the survival of breast cancer (BC) patients. We have previously shown that metformin is particularly potent against triple negative breast cancer (TNBC), with a reduction of proliferation, oncogenicity and motility, inhibition of pro-oncogenic signaling pathways and induction of apoptosis. These BCs are well recognized to be highly dependent on glucose/glucosamine (metabolized through anaerobic glycolysis) and lipids, which are metabolized for the production of energy and cellular building blocks to sustain a high rate of proliferation...
2018: Journal of Oncology Translational Research
https://www.readbyqxmd.com/read/29780491/a-waiting-carbon-nitride-radical-anion-a-charge-storage-material-and-key-intermediate-in-direct-c-h-thiolation-of-methylarenes-using-elemental-sulfur-as-the-s-source
#11
Aleksandr Savateev, Bogdan Kurpil, Artem Mishchenko, Guigang Zhang, Markus Antonietti
Potassium poly(heptazine imide), a carbon nitride based semiconductor with high structural order and a valence band potential of +2.2 V vs. NHE, in the presence of hole scavengers and under visible light irradiation gives the corresponding polymeric radical anion, in which the specific density of unpaired electrons reaches 112 μmol g-1 . The obtained polymeric radical anion is stable under anaerobic conditions for several hours. It was characterized using UV-vis absorption, time resolved and steady state photoluminescence spectra...
April 14, 2018: Chemical Science
https://www.readbyqxmd.com/read/29779823/the-role-of-thiamine-dependent-enzymes-in-obesity-and-obesity-related-chronic-disease-states-a-systematic-review
#12
REVIEW
Donogh Maguire, Dinesh Talwar, Paul G Shiels, Donald McMillan
The WHO 2016 report indicates that worldwide obesity is rising, with over 600 million people in the obese range (BMI>30). The recommended daily calorie intake for adults is 2000 kcal and 2500 kcal for women and men respectively. The average American consumes 3770 kcal/day and the average person in the UK consumes 3400 kcal/day. With such increased caloric intake, there is an increased load on metabolic pathways, in particular glucose metabolism. Such metabolism requires micronutrients as enzyme co-factors...
June 2018: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29779767/novel-red-fluorescence-protein-based-microplate-assay-for-drug-screening-against-dormant-mycobacterium-tuberculosis-by-using-paraffin
#13
Amar Yeware, Dhiman Sarkar
The hypoxia model of dormancy is widely used in drug screening programs to identify novel inhibitors against latent Mycobacterium tuberculosis disease. In earlier reported microplate assays, hypoxia was maintained by either sealing the microplate or shifting in an anaerobic chamber to develop dormant phenotype. In these assays, inhibitors were added during inoculation, which mainly represents the active stage inhibitors instead of the dormant ones. Herein, the culture was covered with paraffin to develop hypoxia condition and consequently providing the advantage of adding compounds at any stage during incubation of 96-well plate...
May 2018: Tuberculosis
https://www.readbyqxmd.com/read/29778800/phenotypic-and-genotypic-diversity-of-lactobacillus-buchneri-strains-isolated-from-spoiled-fermented-cucumber
#14
Katheryne V Daughtry, Suzanne D Johanningsmeier, Rosemary Sanozky-Dawes, Todd R Klaenhammer, Rodolphe Barrangou
Lactobacillus buchneri is a Gram-positive, obligate heterofermentative, facultative anaerobe commonly affiliated with spoilage of food products. Notably, L. buchneri is able to metabolize lactic acid into acetic acid and 1,2-propanediol. Although beneficial to the silage industry, this metabolic capability is detrimental to preservation of cucumbers by fermentation. The objective of this study was to characterize isolates of L. buchneri purified from both industrial and experimental fermented cucumber after the onset of secondary fermentation...
May 9, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29778686/methane-correction-factors-for-estimating-emissions-from-aerobic-wastewater-treatment-facilities-based-on-field-data-in-mexico-and-on-literature-review
#15
A Noyola, M G Paredes, L P Güereca, L T Molina, M Zavala
Wastewater treatment (WWT) may be an important source of methane (CH4 ), a greenhouse gas with significant global warming potential. Sources of CH4 emissions from WWT facilities can be found in the water and in the sludge process lines. Among the methodologies for estimating CH4 emissions inventories from WWT, the more adopted are the guidelines of the Intergovernmental Panel on Climate Change (IPCC), which recommends default emission factors (Tier 1) depending on WWT systems. Recent published results show that well managed treatment facilities may emit CH4 , due to dissolved CH4 in the influent wastewater; in addition, biological nutrient removal also will produce this gas in the anaerobic (or anoxic) steps...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29778405/anaerobic-co-digestion-of-different-wastes-in-a-uasb-reactor
#16
Khushboo Kumari, S Suresh, S Arisutha, K Sudhakar
Anaerobic co-digestion has made a greater impact on the biogas production from mixing different type of waste. In this research, sewage sludge (SS) and cow manure (CM), was used as a primary waste along with kitchen waste (KW), yard waste (YW), floral waste (FW) and dairy wastewater (DWW) as co-substrate for anaerobic digestion. Mixtures with a ratio of 1:2 ratio is fed into a single stage up-flow anaerobic sludge blanket (UASB) reactor. Digestion was carried out in a mesophilic temperature range for 20 days...
May 16, 2018: Waste Management
https://www.readbyqxmd.com/read/29778346/energy-performance-evaluation-of-ultrasonic-pretreatment-of-organic-solid-waste-in-a-pilot-scale-digester
#17
Mazdak Rasapoor, Mehrdad Adl, Saeid Baroutian, Zeynab Iranshahi, Mohammad Pazouki
It has been proven that ultrasonic pretreatment (UP) has positive effect on biogas generation from previous lab-scale studies. However, that is not always the case in larger scale processes. The purpose of this study was to evaluate the effectiveness of UP to biogas generation in terms of anaerobic digestion process and energy efficiency. Parameters including total solids (TS) and ultrasonic treatment operational parameters of organic solid waste (OSW) resulted from our past lab scale UP studies were applied in this study...
April 30, 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29778215/anaerobic-bacterial-response-to-nitrosative-stress
#18
Jeffrey A Cole
This chapter provides an overview of current knowledge of how anaerobic bacteria protect themselves against nitrosative stress. Nitric oxide (NO) is the primary source of this stress. Aerobically its removal is an oxidative process, whereas reduction is required anaerobically. Mechanisms required to protect aerobic and anaerobic bacteria are therefore different. Several themes recur in the review. First, how gene expression is regulated often provides clues to the physiological function of the gene products...
2018: Advances in Microbial Physiology
https://www.readbyqxmd.com/read/29778213/nitric-oxide-an-old-molecule-with-noble-functions-in-pseudomonas-aeruginosa-biology
#19
Masanori Toyofuku, Sang-Sun Yoon
Pseudomonas aeruginosa, a Gram-negative bacterium, is characterized by its versatility that enables persistent survival under adverse conditions. It can grow on diverse energy sources and readily acquire resistance to antimicrobial agents. As an opportunistic human pathogen, it also causes chronic infections inside the anaerobic mucus airways of cystic fibrosis patients. As a strict respirer, P. aeruginosa can grow by anaerobic nitrate ( [Formula: see text] ) respiration. Nitric oxide (NO) produced as an intermediate during anaerobic respiration exerts many important effects on the biological characteristics of P...
2018: Advances in Microbial Physiology
https://www.readbyqxmd.com/read/29778171/combined-zero-valent-iron-and-hydrogen-peroxide-conditioning-significantly-enhances-the-dewaterability-of-anaerobic-digestate
#20
Qilin Wang, Jing Sun, Kang Song, Xu Zhou, Wei Wei, Dongbo Wang, Guo-Jun Xie, Yanyan Gong, Beibei Zhou
The importance of enhancing sludge dewaterability is increasing due to the considerable impact of excess sludge volume on disposal costs and on overall sludge management. This study presents an innovative approach to enhance dewaterability of anaerobic digestate (AD) harvested from a wastewater treatment plant. The combination of zero valent iron (ZVI, 0-4.0g/g total solids (TS)) and hydrogen peroxide (HP, 0-90mg/g TS) under pH3.0 significantly enhanced the AD dewaterability. The largest enhancement of AD dewaterability was achieved at 18mg HP/g TS and 2...
May 2018: Journal of Environmental Sciences (China)
keyword
keyword
87075
1
2
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"