Protein fouling of nanofiltration, reverse osmosis, and ultrafiltration membranes—The role of hydrodynamic conditions, solution chemistry, and membrane properties

2011 ◽  
Vol 376 (1-2) ◽  
pp. 275-282 ◽  
Author(s):  
Yi-Ning Wang ◽  
Chuyang Y. Tang
Keyword(s):  
Reverse Osmosis ◽  
Solution Chemistry ◽  
Membrane Properties ◽  
Hydrodynamic Conditions ◽  
Ultrafiltration Membranes ◽  
Protein Fouling

The role of hydrodynamic conditions and solution chemistry on protein fouling during ultrafiltration

Desalination ◽  
2009 ◽  
Vol 249 (3) ◽  
pp. 1079-1087 ◽  
Author(s):  
Qianhong She ◽  
Chuyang Y. Tang ◽  
Yi-Ning Wang ◽  
Zhenjia Zhang
Keyword(s):  
Solution Chemistry ◽  
Hydrodynamic Conditions ◽  
Protein Fouling

The Role of Solution Chemistry in Calcite Dissolution

2015 ◽  
Vol 21 (5) ◽  
pp. 407-413 ◽  
Author(s):  
David R. Turner
Keyword(s):  
Solution Chemistry ◽  
Calcite Dissolution

Association between alcohol-induced oxidative stress and membrane properties in synaptosomes: A protective role of vitamin E

2017 ◽  
Vol 63 ◽  
pp. 60-65 ◽  
Author(s):  
Vaddi Damodara Reddy ◽  
Pannuru Padmavathi ◽  
Saradamma Bulle ◽  
Ananda Vardhan Hebbani ◽  
Shakeela Begum Marthadu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Vitamin E ◽  
Protective Role ◽  
Membrane Properties

scholarly journals A genetic manipulation of motor neuron excitability does not alter locomotor output in Drosophila larvae

2014 ◽  
Author(s):  
Erin C. McKiernan
Keyword(s):  
Motor Neuron ◽  
Motor Neurons ◽  
Motor Behavior ◽  
Genetic Manipulation ◽  
Motor Output ◽  
Membrane Properties ◽  
Neuron Excitability ◽  
Motor Neuron Excitability ◽  
The Face

Motor activity, like that producing locomotion, is generated by networks of neurons. At the last output level of these networks are the motor neurons, which send signals to the muscles, causing them to contract. Current research in motor control is focused on finding out how motor neurons contribute to shaping the timing of motor behaviors. Are motor neurons just passive relayers of the signals they receive? Or, do motor neurons shape the signals before passing them on to the muscles, thereby influencing the timing of the behavior? It is now well accepted that motor neurons have active, intrinsic membrane properties - there are ion channels in the cell membrane that allow motor neurons to respond to input in non-linear and diverse ways. However, few direct tests of the role of motor neuron intrinsic properties in shaping motor behavior have been carried out, and many questions remain about the role of specific ion channel genes in motor neuron function. In this study, two potassium channel transgenes were expressed in Drosophila larvae, causing motor neurons to fire at lower levels of current stimulation and at higher frequencies, thereby increasing excitability. Mosaic animals were created in which some identified motor neurons expressed the transgenes while others did not. Motor output underlying crawling was compared in muscles innervated by control and experimental neurons in the same animals. Counterintuitively, no effect of the transgenic manipulation on motor output was seen. Future experiments are outlined to determine how the larval nervous system produces normal motor output in the face of altered motor neuron excitability.

Water produce for pharmaceutical industry: role of reverse osmosis stage

Desalination ◽  
2008 ◽  
Vol 221 (1-3) ◽  
pp. 298-302 ◽  
Author(s):  
M. Belkacem ◽  
K. Bensadok ◽  
A. Refes ◽  
P.M. Charvier ◽  
G. Nezzal
Keyword(s):  
Pharmaceutical Industry ◽  
Reverse Osmosis

scholarly journals Role of solution chemistry in the retention and release of graphene oxide nanomaterials in uncoated and iron oxide-coated sand

2017 ◽  
Vol 579 ◽  
pp. 776-785 ◽  
Author(s):  
Dengjun Wang ◽  
Chongyang Shen ◽  
Yan Jin ◽  
Chunming Su ◽  
Lingyang Chu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Iron Oxide ◽  
Solution Chemistry ◽  
Coated Sand

Surface modification of reverse osmosis membranes with zwitterionic polymer to reduce biofouling

2015 ◽  
Vol 15 (5) ◽  
pp. 999-1010 ◽  
Author(s):  
Ahmed E. Abdelhamid ◽  
Mahmoud M. Elawady ◽  
Mahmoud Ahmed Abd El-Ghaffar ◽  
Abdelgawad M. Rabie ◽  
Poul Larsen ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Tap Water ◽  
Membrane Surface ◽  
Salt Content ◽  
Cross Flow ◽  
Membrane Properties ◽  
Cleaning Efficiency ◽  
Bacteria Growth ◽  
Cross Flow Filtration

The zwitterionic homopolymer poly[2-(methacryloyloxy)ethyl-dimethyl-(3-sulfopropyl) ammonium hydroxide was coated onto the surface of commercial polyamide reverse osmosis (RO) membranes. Aqueous solutions of the polymer at different concentrations were applied to modify the polyamide membranes through an in situ surface coating procedure. After membrane modification, cross-flow filtration testing was used to test the antifouling potential of the modified membranes. The obtained data were compared with experimental data for unmodified membranes. Each test was done by cross-flow filtering tap water for 60 hours. Yeast extract was added as a nutrient source for the naturally occurring bacteria in tap water, to accelerate bacteria growth. Fourier transform infrared spectroscopy, contact angle, scanning electron microscopy, atomic force microscopy, and permeation tests were employed to characterize membrane properties. The results confirmed that modifying the membranes enhanced their antifouling properties and cleaning efficiency, the fouling resistance to bacteria improving due to the increased hydrophilicity of the membrane surface after coating. In addition, the water permeability and salt rejection improved. This in situ surface treatment approach for RO membranes could be very important for modifying membranes in their original module assemblies as it increases water production and reduces the salt content.

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