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High cut off membrane

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https://www.readbyqxmd.com/read/27888732/biorefinery-of-microalgal-soluble-proteins-by-sequential-processing-and-membrane-filtration
#1
C Safi, G Olivieri, R P Campos, N Engelen-Smit, W J Mulder, L A M van den Broek, L Sijtsma
A mild biorefinery process was investigated on the microalga Nannochloropsis gaditana, to obtain an enriched fraction of water soluble proteins free from chlorophyll. After harvesting, a 100g.L(-1) solution of cells was first subjected to cell disruption by either high-pressure homogenization (HPH) or enzymatic treatment (ENZ). HPH resulted in a larger release of proteins (49%) in the aqueous phase compared to the Alcalase incubation (35%). In both cases, an ultrafiltration/diafiltration (UF/DF) was then performed on the supernatant obtained from cell disruption by testing different membrane cut-off (1000kDa, 500kDa and 300kDa)...
November 18, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27887601/protocol-for-a-prospective-randomized-study-on-neurophysiological-assessment-of-lower-urinary-tract-function-in-a-healthy-cohort
#2
Stéphanie van der Lely, Martina Stefanovic, Melanie R Schmidhalter, Marta Pittavino, Reinhard Furrer, Martina D Liechti, Martin Schubert, Thomas M Kessler, Ulrich Mehnert
BACKGROUND: Lower urinary tract symptoms are highly prevalent and a large proportion of these symptoms are known to be associated with a dysfunction of the afferent pathways. Diagnostic tools for an objective and reproducible assessment of afferent nerve function of the lower urinary tract are missing. Previous studies showed first feasibility results of sensory evoked potential recordings following electrical stimulation of the lower urinary tract in healthy subjects and patients. Nevertheless, a refinement of the methodology is necessary...
November 25, 2016: BMC Urology
https://www.readbyqxmd.com/read/27863531/effects-of-continuous-renal-replacement-therapy-on-linezolid-pharmacokinetic-pharmacodynamics-a-systematic-review
#3
Gianluca Villa, Paola Di Maggio, A Raffaele De Gaudio, Andrea Novelli, Riccardo Antoniotti, Enrico Fiaccadori, Chiara Adembri
BACKGROUND: Major alterations in linezolid pharmacokinetic/pharmacodynamic (PK/PD) parameters might be expected in critically ill septic patients with acute kidney injury (AKI) who are undergoing continuous renal replacement therapy (CRRT). The present review is aimed at describing extracorporeal removal of linezolid and the main PK-PD parameter changes observed in critically ill septic patients with AKI, who are on CRRT. METHOD: Citations published on PubMed up to January 2016 were systematically reviewed according to the preferred reporting items for systematic reviews and meta-analyses (PRISMA) statement...
November 19, 2016: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/27812452/efficacy-of-indirect-elisa-for-serodiagnosis-of-melioidosis-using-immunodominant-antigens-from-non-pathogenic-burkholderia-thailandensis
#4
Sumet Wajanarogana, Kanyanan Kritsiriwuthinan
Melioidosis caused by gram negative bacteria, B. pseudomallei, is a fatal disease in the tropical and sub-tropical regions. However, sporadic cases have been reported in elsewhere. Early detection is imperative to reduce the mortality rate. Serological tests have being substantially developed using recombinant proteins as specific targeted antigens to melioidosis antibodies. In the present study, we focus on a truncated flagellin fragment (FLAG300) and outer membrane protein A (OmpABT) of B. thailandensis E264 as potential antigens for developing indirect ELISA to improve the serodiagnosis of melioidosis...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27775143/nickel-hydroxide-nanosheet-membranes-with-fast-water-and-organics-transport-for-molecular-separation
#5
Yan Qu, Qiu Gen Zhang, Faizal Soyekwo, Run Sheng Gao, Rui Xue Lv, Chen Xiao Lin, Meng Meng Chen, Ai Mei Zhu, Qing Lin Liu
Two-dimensional nanosheets of late show great promise as novel materials for size-selective separation membranes of high efficiency. Herein, we demonstrate a novel laminated nanofiltration membrane for fast water purification and organic solvent nanofiltration using the 1 nm-thick and 50 nm-wide nickel hydroxide nanosheets that are facilely prepared by a green chemistry method. The resulting membranes exhibit uniform and flectional two-dimensional laminated structure. With about 1 nm high laminated channels, they allow super-fast transport of water and organic solvents...
October 24, 2016: Nanoscale
https://www.readbyqxmd.com/read/27774905/estradiol-uptake-in-a-combined-magnetic-ion-exchange-ultrafiltration-miex-uf-process-during-water-treatment
#6
Alessandra Imbrogno, Jennifer Biscarat, Andrea Iris Schäfer
BACKGROUND: Estrogens and their synthetic analogues are widely used as pharmaceuticals. Upon oral administration these drugs are eventually excreted via urine. The persistence of these pharmaceuticals and inefficient removal by water treatment lead to accumulation in surface water and effluents with negative effects for aquatic life and human health. METHODS: In this study, the uptake of estradiol by a combined magnetic ion exchange resin - ultrafiltration process (MIEX-UF) was investigated...
October 21, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27717372/development-of-a-programmed-cell-death-ligand-1-immunohistochemical-assay-validated-for-analysis-of-non-small-cell-lung-cancer-and-head-and-neck-squamous-cell-carcinoma
#7
Marlon C Rebelatto, Anita Midha, Amita Mistry, Constantine Sabalos, Nicole Schechter, Xia Li, Xiaoping Jin, Keith E Steele, Paul B Robbins, John A Blake-Haskins, Jill Walker
BACKGROUND: A high-quality programmed cell-death ligand 1 (PD-L1) diagnostic assay may help predict which patients are more likely to respond to anti-programmed cell death-1 (PD-1)/PD-L1 antibody-based cancer therapy. Here we describe a PD-L1 immunohistochemical (IHC) staining protocol developed by Ventana Medical Systems Inc. and key analytical parameters of its use in formalin-fixed, paraffin-embedded (FFPE) samples of non-small cell lung cancer (NSCLC) and head and neck squamous cell carcinoma (HNSCC)...
October 8, 2016: Diagnostic Pathology
https://www.readbyqxmd.com/read/27703642/immunohistochemistry-study-of-p53-and-c-erbb-2-expression-in-trophoblastic-tissue-and-their-predictive-values-in-diagnosing-malignant-progression-of-simple-molar-pregnancy
#8
Malihe Hasanzadeh, Norrie Sharifi, Marjaneh Farazestanian, Seyed Saman Nazemian, Faezeh Madani Sani
BACKGROUND: Finding a tumor marker to predict the aggressive behavior of molar pregnancy in early stages has yet been a topic for studies. OBJECTIVES: In this survey we planned to study patients with molar pregnancy to 1) assess the p53 and c-erbB-2 expression in trophoblastic tissue, 2) to study the relationship between their expression intensity and progression of a molar pregnancy to gestational trophoblastic neoplasia, and 3) to determine a cut off value for the amount of p53 and c-erbB-2 expression which might correlate with aggressive behavior of molar pregnancy...
June 2016: Iranian Journal of Cancer Prevention
https://www.readbyqxmd.com/read/27670395/impact-of-serum-and-dialysates-obtained-from-chronic-hemodialysis-patients-maintained-on-high-cut-off-membranes-on-inflammation-profile-in-human-thp-1-monocytes
#9
Bogusz Trojanowicz, Christof Ulrich, Roman Fiedler, Markus Storr, Torsten Boehler, Peter Martus, Michael Pawlak, Marcus A Glomb, Christian Henning, Markus Templin, Kristin Werner, Daniel Zickler, Kevin Willy, Ralf Schindler, Matthias Girndt
Introduction Patients with chronic kidney disease maintained on intermittent hemodialysis suffer from systemic chronic inflammation which is causally associated with high mortality. Inflammation mediators of 15-45 kDa range cannot be effectively removed by conventional dialysis membranes. In this study, we tested the influence of serum and dialysates obtained from patients maintained on High cut-off or High flux membranes on the inflammation profile of THP-1 monocytes. Methods THP-1 monocytes were treated with serum or dialysates obtained from patients maintained on High cut-off and High flux membranes within a randomized crossover pilot trial...
September 26, 2016: Hemodialysis International
https://www.readbyqxmd.com/read/27663975/prevention-of-adhesions-in-the-temporomandibular-joint-by-the-use-of-chitosan-membrane-in-goats
#10
Hp Li, Sf Sun, Bt Fan, P Shen, Js Zheng, Sy Zhang
We evaluated the effects of chitosan membrane, a highly absorbable and viscous material, in the prevention of intra-articular adhesions after anchoring of the disc in the temporomandibular joints (TMJ) of six adult goats (12 joints). To simulate anterior displacement of the disc and TMJ trauma, we cut off the retrodiscal attachment and damaged the surface of the condylar bone, then randomly divided the goats into two groups: the control group (n=2) and the experimental group (n=4). In the experimental group we covered the condylar surfaces on both sides of the animals with chitosan membranes...
September 20, 2016: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/27646819/current-treatments-for-renal-failure-due-to-multiple-myeloma
#11
Maria Gavriatopoulou, Evangelos Terpos, Efstathios Kastritis, Meletios A Dimopoulos
INTRODUCTION: Renal impairment (RI) is one of the most common complication of multiple myeloma (MM). RI is present in almost 20% of MM patients at diagnosis and in 40%-50% of patients during the course of their disease. AREAS COVERED: Biology along with tools for diagnosis and management of RI are reported in this paper. Papers published in PubMed and reported abstracts up to May 2016 were used. EXPERT OPINION: Moderate and severe RI increases the risk of early death; thus rapid intervention and initiation of anti-myeloma treatment is essential and improves renal outcomes in RI patients...
September 27, 2016: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/27627366/robust-ion-current-oscillations-under-a-steady-electric-field-an-ion-channel-analog
#12
Yu Yan, Yunshan Wang, Satyajyoti Senapati, Jarrod Schiffbauer, Gilad Yossifon, Hsueh-Chia Chang
We demonstrate a nonlinear, nonequilibrium field-driven ion flux phenomenon, which unlike Teorell's nonlinear multiple field theory, requires only the application of one field: robust autonomous current-mass flux oscillations across a porous monolith coupled to a capillary with a long air bubble, which mimics a hydrophobic protein in an ion channel. The oscillations are driven by the hysteretic wetting dynamics of the meniscus when electro-osmotic flow and pressure driven backflow, due to bubble expansion, compete to approach zero mass flux within the monolith...
August 2016: Physical Review. E
https://www.readbyqxmd.com/read/27587605/performance-of-hemodialysis-with-novel-medium-cut-off-dialyzers
#13
Alexander H Kirsch, Raphael Lyko, Lars-Göran Nilsson, Werner Beck, Michael Amdahl, Petra Lechner, Andreas Schneider, Christoph Wanner, Alexander R Rosenkranz, Detlef H Krieter
BACKGROUND: Compared to high-flux dialysis membranes, novel medium cut-off (MCO) membranes show greater permeability for larger middle molecules. METHODS: In two prospective, open-label, controlled, randomized, crossover pilot studies, 39 prevalent hemodialysis (HD) patients were studied in four dialysis treatments as follows: study 1, three MCO prototype dialyzers (AA, BB and CC with increasing permeability) and one high-flux dialyzer in HD; and study 2, two MCO prototype dialyzers (AA and BB) in HD and high-flux dialyzers in HD and hemodiafiltration (HDF)...
September 1, 2016: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/27577325/extracorporeal-lung-support-and-continuous-renal-replacement-therapy-in-series-combination-the-role-of-high-cut-off-membranes
#14
Guglielmo Consales, Lucia Zamidei, Giuliano Michelagnoli
No abstract text is available yet for this article.
August 30, 2016: Blood Purification
https://www.readbyqxmd.com/read/27542480/betalain-rich-functional-extract-with-reduced-salts-and-nitrate-content-from-red-beetroot-beta-vulgaris-l-using-membrane-separation-technology
#15
Ram Mereddy, Adeline Chan, Kent Fanning, Nilesh Nirmal, Yasmina Sultanbawa
An initial laboratory-scale evaluation of separation characteristics of membranes with nominal molecular weight cut-offs (NMWCO) ranging from 30kD down to 0.5kD indicated effective separation of betalains in the 0.5kD region. Subsequent pilot-level trials using 1kD, loose reverse osmosis (LRO) and reverse osmosis (RO) spiral-wound membranes showed LRO membrane to be very efficient with up to 96% salt and 47% other dissolved solids removed while retaining majority of the pigment (∼98%) in the betalain rich extract (BRE)...
January 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27532547/a-robust-and-efficient-production-and-purification-procedure-of-recombinant-alzheimers-disease-methionine-modified-amyloid-%C3%AE-peptides
#16
Marie Hoarau, Yannick Malbert, Romain Irague, Christelle Hureau, Peter Faller, Emmanuel Gras, Isabelle André, Magali Remaud-Siméon
An improved production and purification method for Alzheimer's disease related methionine-modified amyloid-β 1-40 and 1-42 peptides is proposed, taking advantage of the formation of inclusion body in Escherichia coli. A Thioflavin-S assay was set-up to evaluate inclusion body formation during growth and optimize culture conditions for amyloid-β peptides production. A simple and fast purification protocol including first the isolation of the inclusion bodies and second, two cycles of high pH denaturation/ neutralization combined with an ultrafiltration step on 30-kDa cut-off membrane was established...
2016: PloS One
https://www.readbyqxmd.com/read/27467401/therapeutic-efficacy-and-cost-effectiveness-of-high-cut-off-dialyzers-compared-to-conventional-dialysis-in-patients-with-cast-nephropathy
#17
Adriano Curti, Albin Schwarz, Johannes Trachsler, Yuki Tomonaga, Patrice M Ambühl
BACKGROUND: High Cut-Off (HCO) dialysis membranes efficiently reduce serum free light chain (FLC) concentrations and may improve renal recovery and survival from multiple myeloma (MM) associated renal failure with cast nephropathy. However, clinical trials comparing dialysis with HCO versus conventional filters are lacking. The aim of this study was to assess clinical outcomes and economic impact of HCO dialyzers compared to conventional hemodialysis membranes in cast nephropathy. METHODS: Multicenter retrospective analysis of 19 patients treated for renal failure from FLC associated cast nephropathy with standard induction chemotherapy (bortezomib/dexamethasone)...
2016: PloS One
https://www.readbyqxmd.com/read/27445317/high-cut-off-dialysis-in-chronic-haemodialysis-patients-reduces-serum-procalcific-activity
#18
Daniel Zickler, Kevin Willy, Matthias Girndt, Roman Fiedler, Peter Martus, Markus Storr, Ralf Schindler
BACKGROUND: Vascular calcification is enhanced in chronic dialysis patients, possibly due to the insufficient removal of various intermediate molecular weight uraemic toxins such as interleukins with conventional membranes. In this study, we assessed the modulation of in vitro vascular calcification with the use of high cut-off (HCO) membranes in chronic dialysis patients. METHODS: In a PERCI trial, 43 chronic dialysis patients were treated with conventional high-flux and HCO filters for 3 weeks in a randomized order following a 2-period crossover design...
October 2016: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/27438237/tabas-coal-preparation-plant-wastewater-treatment-with-membrane-technology
#19
Ahmad Akbari, Vahid Reza Abbaspour, Seyed Majid Mojallali Rostami
The goal of the present work is the Tabas coal preparation plant wastewater treatment using membrane technology. Polyacrylonitrile membrane was prepared through phase inversion method and then developed by annealing process. Also, high fouling resistance membranes were prepared by the embedding of TiO2 nanoparticles using self-assembling and blending methods. The effect of immersion time and TiO2 nanoparticles concentration was investigated using two techniques. The chemical structure, morphology, hydrophilicity, molecular weight cut-off and antifouling properties of membranes were characterized using energy-dispersive X-ray spectroscopy, scanning electron microscopy, contact angle, polyethylene glycol tracers, and cationic polyacrylamide (C-PAM) filtration, respectively...
2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/27392313/human-umbilical-cord-wharton-s-jelly-stem-cell-conditioned-medium-induces-tumoricidal-effects-on-lymphoma-cells-through-hydrogen-peroxide-mediation
#20
Hao Daniel Lin, Chui-Yee Fong, Arijit Biswas, Mahesh Choolani, Ariff Bongso
Several groups have reported that human umbilical cord Wharton's jelly stem cells (hWJSCs) possess unique tumoricidal properties against many cancers. However, the exact mechanisms as to how hWJSCs inhibit tumor growth are not known. Recent evidence suggests that exposure of cancer cells to high hydrogen peroxide (H2 O2 ) levels from H2 O2 -releasing drugs causes their death. We therefore explored whether the tumoricidal effect of hWJSCs on lymphoma cells was mediated via H2 O2 . We first exposed lymphoma cells to six different molecular weight cut-off (MWCO) concentrates of hWJSC-conditioned medium (hWJSC-CM) (3, 5, 10, 30, 50, 100 kDa) for 48 h...
September 2016: Journal of Cellular Biochemistry
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