keyword
MENU ▼
Read by QxMD icon Read
search

Operative

keyword
https://www.readbyqxmd.com/read/28432991/characteristics-of-adapted-hydrogenotrophic-community-during-biomethanation
#1
Lydia Rachbauer, Reinhard Beyer, Günther Bochmann, Werner Fuchs
The results presented in this study were carried out as concomitant experiments during the start-up and operation of a biomethanation unit to evaluate the effect of process parameters on carbon conversion, product formation (methane and acetate) and community composition. For that, two different samples were withdrawn from a trickle-bed reactor with immobilized enrichment culture of hydrogenotrophic methanogens adapted from sewage sludge. One sample was taken from the recirculation liquid during start-up phase while the other was withdrawn directly from the carrier material in the reactor...
April 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28432953/new-and-practical-mathematical-model-of-membrane-fouling-in-an-aerobic-submerged-membrane-bioreactor
#2
Mst Fazana Rahman Zuthi, Wenshan Guo, Huu Hao Ngo, Duc Long Nghiem, Faisal I Hai, Siqing Xia, Jianxin Li, Jixiang Li, Yi Liu
This study aimed to develop a practical semi-empirical mathematical model of membrane fouling that accounts for cake formation on the membrane and its pore blocking as the major processes of membrane fouling. In the developed model, the concentration of mixed liquor suspended solid is used as a lumped parameter to describe the formation of cake layer including the biofilm. The new model considers the combined effect of aeration and backwash on the foulants' detachment from the membrane. New exponential coefficients are also included in the model to describe the exponential increase of transmembrane pressure that typically occurs after the initial stage of an MBR operation...
April 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28432949/dominance-of-candidate-saccharibacteria-in-a-membrane-bioreactor-treating-medium-age-landfill-leachate-effects-of-organic-load-on-microbial-communities-hydrolytic-potential-and-extracellular-polymeric-substances
#3
Nikolaos Remmas, Paraschos Melidis, Ioanna Zerva, Jon Bent Kristoffersen, Sofia Nikolaki, George Tsiamis, Spyridon Ntougias
A membrane bioreactor (MBR), accomplishing high nitrogen removal efficiencies, was evaluated under various landfill leachate concentrations (50, 75 and 100% v/v). Proteinous and carbohydrate extracellular polymeric substances (EPS) and soluble microbial product (SMP) were strongly correlated (p<0.01) with organic load, salinity and NH4(+)-N. Exceptionally high β-glucosidase activities (6700-10,100Ug(-1)) were determined during MBR operation with 50% v/v leachate, as a result of the low organic carbon availability that extendedly induced β-glucosidases to breakdown the least biodegradable organic fraction...
April 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28432940/a-sandwich-immunoassay-for-brucellosis-diagnosis-based-on-immune-magnetic-beads-and-quantum-dots
#4
Li Li, Dehui Yin, Kun Xu, Yushen Liu, Dandan Song, Juan Wang, Chao Zhao, Xiuling Song, Juan Li
Brucellosis is a serious zoonosis with a rapid increase in incidence across epidemic regions. Currently, there are numerous methods for diagnosing brucellosis. However, these studies often have a few defects, such as low sensitivity, poor specificity, time consuming, laborious, and even potential biological risk. To overcome these shortcomings, we have developed a rapid, sensitive and accurate diagnosis procedure for brucellosis based on the immune magnetic beads (IMB) probe and quantum dots (QDs) - staphylococcal protein A (SPA) probe...
April 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28432931/acute-appendicitis-presenting-as-an-abdominal-wall-abscess-a-case-report
#5
Khalid Ahmed, Suhail Hakim, Ahmed M Suliman, Ammar Aleter, Ayman El-Menyar, Sheriff Abdulazeim Mustafa, Ahmad Zarour, Hassan Al-Thani
INTRODUCTION: Amyand hernia (AH) is a rare type of hernia characterized by the presence of appendix vermiformis in the inguinal hernial sac. It is rarely reported in women. PRESENTATION OF CASE: We presented a case of a 60- year old woman who was admitted initially with an abdominal wall abscess and found to have perforated appendix in the right inguinal hernia. The patient underwent standard open appendectomy and the post-operative course was uneventful. DISCUSSION: The initial presentation of our case as an abdominal wall abscess is rare in the contemporary literature...
April 4, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28432919/synthesis-fluorescence-sensing-and-molecular-logic-of-two-water-soluble-1-8-naphthalimides
#6
Nikolai I Georgiev, Margarita D Dimitrova, Anelia Ts Mavrova, Vladimir B Bojinov
Two novel highly water-soluble fluorescence sensing 1,8-naphthalimides are synthesized and investigated. The novel compounds are designed on the "fluorophore-receptor1-spacer-receptor2" model as a molecular fluorescence probe for determination of cations and anions in 100% aqueous media. The novel probes comprising N-imide and N-phenylpiperazine or morpholine substituents are capable to operate simultaneously via ICT and PET signaling mechanism as a function of pH and to recognize selectively Cu(2+) and Hg(2+) over the other representative metal ions...
April 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28432884/use-of-presepsin-and-procalcitonin-for-prediction-of-septifast-results-in-critically-ill-patients
#7
Dunja Mihajlovic, Snezana Brkic, Arsen Uvelin, Biljana Draskovic, Vladimir Vrsajkov
PURPOSE: There is a need for identification of marker that could lead physicians to take the right step towards laboratory techniques for documentation of infection. The aim of this study was to investigate whether presepsin and procalcitonin (PCT) levels in patients with suspected sepsis could predict blood culture (BC) and SeptiFast (SF) results. MATERIAL AND METHODS: 100 patients were included in our study. PCT, C-reactive protein (CRP), and presepsin levels were determined...
April 8, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28432850/a-detailed-experimental-study-of-a-dna-computer-with-two-endonucleases
#8
Sebastian Sakowski, Tadeusz Krasiński, Joanna Sarnik, Janusz Blasiak, Jacek Waldmajer, Tomasz Poplawski
Great advances in biotechnology have allowed the construction of a computer from DNA. One of the proposed solutions is a biomolecular finite automaton, a simple two-state DNA computer without memory, which was presented by Ehud Shapiro's group at the Weizmann Institute of Science. The main problem with this computer, in which biomolecules carry out logical operations, is its complexity - increasing the number of states of biomolecular automata. In this study, we constructed (in laboratory conditions) a six-state DNA computer that uses two endonucleases (e...
April 22, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28432835/detection-of-soft-tissue-abscess-comparison-of-diffusion-weighted-imaging-to-contrast-enhanced-mri
#9
Chang Woo Chun, Joon-Yong Jung, Jun Seung Baik, Won-Hee Jee, Sun Ki Kim, Seung Han Shin
PURPOSE: To compare the diagnostic performances of diffusion-weighted imaging (DWI)-combined magnetic resonance imaging (MRI) performed without intravenous contrast material with gadolinium contrast material-enhanced (CE) MRI for diagnosing soft-tissue abscesses. MATERIALS AND METHODS: In all, 119 patients (mean age: 56 years) with skin and soft-tissue infection who underwent contrast-enhanced MRI with DWI (b = 0-800) were included. Two readers independently reviewed both image sets-nonenhanced conventional MR images (NECI)+DWI, and NECI+contrast enhanced fat-suppressed T1 -weighted imaging (CEFST1 )-for the presence of abscess...
April 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28432822/focal-liver-lesions-segmentation-and-classification-in-nonenhanced-t2-weighted-mri
#10
Ilias Gatos, Stavros Tsantis, Maria Karamesini, Stavros Spiliopoulos, Dimitris Karnabatidis, John D Hazle, George C Kagadis
PURPOSE: To automatically segment and classify focal liver lesions (FLLs) on nonenhanced T2-weighted magnetic resonance imaging (MRI) scans using a computer-aided diagnosis (CAD) algorithm. METHODS: 71 FLLs (30 benign lesions, 19 hepatocellular carcinomas, and 22 metastases) on T2-weighted MRI scans were delineated by the proposed CAD scheme. The FLL segmentation procedure involved wavelet multiscale analysis to extract accurate edge information and mean intensity values for consecutive edges computed using horizontal and vertical analysis that were fed into the subsequent fuzzy C-means algorithm for final FLL border extraction...
April 22, 2017: Medical Physics
https://www.readbyqxmd.com/read/28432685/chiral-analysis-of-%C3%AE-diimine-ru-ii-and-fe-ii-complexes-by-capillary-electrophoresis-using-sulfated-cyclodextrins-as-stereoselectors
#11
Petra Sázelová, Dušan Koval, Lukáš Severa, Filip Teplý, Václav Kašička
Capillary electrophoresis (CE) using randomly highly sulfated α-, β-, and γ-cyclodextrins (S-α-CD, S-β-CD, S-γ-CD), sulfobutylether-β-CD (SBE-β-CD), single isomer (6-O-sulfo) α-, β-, and γ-CDs and their derivatives as stereoselectors was applied to chiral analysis of polypyridyl complexes of [Ru(bpy)3 ](2+) , [Ru(phen)3 ](2+) , and [Fe(phen)3 ](2+) (bpy = 2,2'-bipyridine; phen = 1,10 phenanthroline). The best separations of Δ- and Λ-enantiomers of the these complexes with high resolution (up to R1,2  = 7...
April 22, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28432627/inorganic-fouling-control-in-reverse-osmosis-wastewater-reclamation-by-purging-carbon-dioxide
#12
Muhammad Kashif Shahid, Minsu Pyo, Young-Gyun Choi
Inorganic fouling on the membrane surface is one of the major prevalent issues affecting the performance and cost of reverse osmosis system. Chemical dosage is a widely adopted method for the inhibition of inorganic scale on the membrane surface. In this study, CO2 was used to control inorganic scale formation on surface of reverse osmosis (RO) membrane in wastewater reclamation. The pH of influent could be lowered by purging CO2. It caused an increase in solubility of inorganic salts in water resulting in discharge of principle ions in concentrate stream...
April 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28432625/synthesis-of-magnetic-cofe2o4-ordered-mesoporous-carbon-nanocomposites-and-application-in-fenton-like-oxidation-of-rhodamine-b
#13
Jing Deng, Yi-Jing Chen, Yu-An Lu, Xiao-Yan Ma, Shan-Fang Feng, Naiyun Gao, Jun Li
CoFe2O4/ordered mesoporous carbon (OMC) nanocomposites were synthesized and tested as heterogeneous peroxymonosulfate (PMS) activator for the removal of rhodamine B. Characterization confirmed that CoFe2O4 nanoparticles were tightly bonded to OMC, and the hybrid catalyst possessed high surface area, pore volume, and superparamagnetism. Oxidation experiments demonstrated that CoFe2O4/OMC nanocomposites displayed favorable catalytic activity in PMS solution and rhodamine B degradation could be well described by pseudo-first-order kinetic model...
April 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28432623/performance-of-cstr-egsb-sbr-system-for-treating-sulfate-rich-cellulosic-ethanol-wastewater-and-microbial-community-analysis
#14
Lili Shan, Zhaohan Zhang, Yanling Yu, John Justo Ambuchi, Yujie Feng
Performance and microbial community composition were evaluated in a two-phase anaerobic and aerobic system treating sulfate-rich cellulosic ethanol wastewater (CEW). The system was operated at five different chemical oxygen demand (COD)/SO4(2-) ratios (63.8, 26.3, 17.8, 13.7, and 10.7). Stable performance was obtained for total COD removal efficiency (94.5%), sulfate removal (89.3%), and methane production rate (11.5 L/day) at an organic loading rate of 32.4 kg COD/(m(3)·day). The acidogenic reactor made a positive contribution to net VFAs production (2318...
April 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28432612/evaluation-of-the-analgesia-nociception-index-ani-in-healthy-awake-volunteers
#15
Rami Issa, Marco Julien, Elizabeth Décary, Olivier Verdonck, Louis-Philippe Fortier, Pierre Drolet, Philippe Richebé
BACKGROUND: Analgesia might be evaluated with simple changes in vital signs, a non-specific and non-sensitive method. Heart rate variability (HRV) correlates with autonomous nervous system activity and can be used to evaluate painful stimuli. Heart rate variability is then transformed into a numeric scale called the analgesia nociception index (ANI), where higher values represent predominant parasympathetic tone, thus low nociception. Under general anesthesia, the ANI decreases following painful stimuli and increases after administration of analgesia, but significant interindividual variability is present...
April 21, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28432585/patterns-of-care-and-treatment-outcomes-in-older-adults-with-low-grade-glioma-a-50-year-experience
#16
Ryan S Youland, David A Schomas, Paul D Brown, Ian F Parney, Nadia N I Laack
The purpose of this study was to identify changes in presentation, treatment and outcomes of older patients with low-grade glioma (LGG) over the past 50 years. 94 adults aged 55 or older upon diagnosis of a WHO grade II LGG at Mayo Clinic between 1960 and 2011 were included and grouped by those diagnosed before (group I: 1960-1989) and after (group II: 1990-2011) the routine use of post-operative MRI. Median follow-up was 11.4 years. Pathologic diagnoses included astrocytoma in 55%, mixed oligoastrocytoma in 18% and oligodendroglioma in 27%...
April 21, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28432561/predicting-fluid-responsiveness-in-whom-a-simulated-example-of-patient-spectrum-influencing-the-receiver-operating-characteristics-curve
#17
Lars Øivind Høiseth, Jostein S Hagemo
The influence of patient spectrum on the sensitivities and specificities of diagnostic methods has been termed spectrum bias or spectrum effect. Receiver operating characteristics curves are often used to assess the ability of diagnostic methods to predict fluid responsiveness. As a receiver operating characteristics curve is a presentation of sensitivity and specificity, the purpose of the present manuscript was to explore if patient spectrum could affect areas under receiver operating characteristics curves and their gray zones...
April 21, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28432540/preliminary-clinical-study-on-non-transecting-anastomotic-bulbomembranous-urethroplasty
#18
Wei Le, Chao Li, Jinfu Zhang, Denglong Wu, Bo Liu
This study aims to investigate the effect of non-transecting anastomotic urethroplasty for treatment of posterior urethral stricture. A total of 23 patients with traumatic posterior urethral stricture were enrolled and then divided into two groups. In one group, 12 patients underwent non-transecting anastomotic urethroplasty. In the other group, 11 patients underwent conventional posterior urethra end-to-end anastomosis. The effect of operation was evaluated using the following parameters: the bleeding amount during operation, operation time, IIEF-5 scores after operation, maximum flow rate (Qmax), and rating scale of quality of life (QoL)...
April 22, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28432532/a-portable-battery-powered-microfluidic-impedance-cytometer-with-smartphone-readout-towards-personal-health-monitoring
#19
Niloy Talukder, Abbas Furniturewalla, Tuan Le, Matthew Chan, Shreyas Hirday, Xinnan Cao, Pengfei Xie, Zhongtian Lin, Azam Gholizadeh, Steve Orbine, Mehdi Javanmard
We present a portable system for personalized blood cell counting consisting of a microfluidic impedance cytometer and portable analog readout electronics, feeding into an analog-to-digital converter (ADC), and being transmitted via Bluetooth to a user-accessible mobile application. We fabricated a microfluidic impedance cytometer with a novel portable analog readout. The novel design of the analog readout, which consists of a lock-in-amplifier followed by a high-pass filter stage for subtraction of drift and DC offset, and a post-subtraction high gain stage, enables detection of particles and cells as small as 1 μm in diameter, despite using a low-end 8-bit ADC...
June 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28432524/correlation-of-serum-mmp3-and-other-biomarkers-with-clinical-outcomes-in-patients-with-ankylosing-spondylitis-a-pilot-study
#20
Dongyi He, Qi Zhu, Quan Zhou, Qing Qi, Hongmei Sun, Liza M Zachariah, Grace Wang, John D Reveille, Yongtao Guan, Xiaodong Zhou
The studies aimed to assess a set of biomarkers for their correlations with disease activity/severity of patients with ankylosing spondylitis (AS). A total of 24 AS patients were treated with etanercept and prospectively followed for 12 weeks. Serum levels of TNF-α, IFN-γ, TGF-β, IL6, IL15, IL17, MMP3, and MICA were measured at baseline and after treatment. The change of these biomarkers was analyzed for correlations with MRI indices for joint inflammation, Bath Ankylosing Spondylitis Disease Activity Index, Bath Ankylosing Spondylitis Functional Index, AS Disease Activity Score, serum CRP, and ESR...
April 22, 2017: Clinical Rheumatology
keyword
keyword
10040
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"