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	Ultrafiltration therapy safe and effective
		A device that performs ultrafiltration of blood, without requiring specialized nursing care or invasive central intravenous access, can reduce fluid overload in patients with congestive heart failure, according to a new study in the Dec. 6, 2005, issue of the Journal of the American College of Cardiology.
		The ultrafiltration was performed with a device that has been approved by the federal Food and Drug Administration for use outside of intensive care units and without specialized nursing or central intravenous access.
		Ultrafiltration was successful in 18 of the 20 patients in the group.
	www.news-medical.net /?id=14822 (955 words)

	Dynatec Systems - Technologies - Membrane Separation - Ultrafiltration
		Ultrafiltration is not as fine a filtration process as nanofiltration, but it also does not require the same energy to perform the separation.
		Ultrafiltration also uses a membrane that is partially permeable to perform the separation, but the membrane's pores are typically much larger than the membranes pores that are used in nanofiltration.
		Ultrafiltration is most commonly used to separate a solution that has a mixture of some desirable components and some that are not desirable.
	www.dynatecsystems.com /technologies/MS/more/UF.html (221 words)

	Fact Sheet: Ultrafiltration (Site not responding. Last check: 2007-10-11)
		Ultrafiltration is a lower pressure membrane separation technology used to remove suspended solids, oils and other impurities from wastewater.
		Pressure is applied to one side of the membrane so that water and low molecular weight compounds in the waste stream flow through the pores as permeate, while the larger molecules and suspended solids flow across the membrane and become part of the concentrate.
		The third configuration of ultrafiltration membranes is the spiral-wound, and it is usually used for high volume applications.
	es.epa.gov /techinfo/facts/ri/ri-filtr.html (846 words)

	Ultrafiltration - Wikipedia, the free encyclopedia
		Ultrafiltration (UF) is a variety of membrane filtration in which hydrostatic pressure forces a liquid against a semipermeable membrane.
		Ultrafiltration is not fundamentally different from reverse osmosis, microfiltration or nanofiltration, except in terms of the size of the molecules it retains.
		Ultrafiltration is used in reverse osmosis processes in many Middle Eastern countries to produce fresh water as there is little fresh water available in those areas.
	en.wikipedia.org /wiki/Ultrafiltration (671 words)

	Ultrafiltration Basics
		Ultrafiltration is a pressure-driven process which uses semi-permeable synthetic membranes to separate certain chemicals and materials from water.
		A phenomenon of ultrafiltration is known as concentration polarization.
		Ultrafiltration can be used independently or in association with other treatments such as coagulation or precipitation.
	www.wqpmag.com /wqp/index.cfm/powergrid/rfah=\|cfap=/CFID/4297027/CFTOKEN/48089505/fuseaction/showArticle/articleID/354 (918 words)

	Using ultrafiltration to treat heart failure Nursing - Find Articles (Site not responding. Last check: 2007-10-11)
		During fluid removal by ultrafiltration, the patient's intravascular fluid volume remains stable, as fluid shifts from the extravascular space to replace that lost from the vessels.
		Ultrafiltration uses a mechanical pump and a hemofilter to remove 2 to 4 liters of fluid with each treatment, alleviating the patient's symptoms.
		By understanding ultrafiltration, you might be able to help patients with heart failure reduce their symptoms and return to normal activities.
	www.findarticles.com /p/articles/mi_qa3689/is_200404/ai_n9402171 (693 words)

	ULTRAFILTRATION CAPILLARY MEMBRANE PROCESS DEVELOPMENT FOR DRINKING WATER
		An ultrafiltration membrane is a membrane that effects separation on the principle of sieving.
		Ultrafiltration membranes are produced in either flat-sheet or tubular-type geometries.
		Although ultrafiltration membranes are not as productive as microfiltration membranes are, and are operated at a slightly higher transmembrane pressure, ultrafiltration is slowly becoming the preferred process because of the smaller pore size of ultrafiltration membranes.
	www.fwr.org /wrcsa/965103.htm (2064 words)

	BAS In Vivo Ultrafiltration Sampling
		The concentration of an analyte in the ultrafiltrate represents the concentration of that analyte in the sampled tissue.
		Ultrafiltration probes require a vacuum source in order to extract fluid from the tissue which surrounds the probe.
		Ultrafiltration probes uses loops of membrane which are connected to a single collection tube.
	www.bioanalytical.com /products/md/ivultsmp.html (939 words)

	Ultrafiltration water collector - Patent 4073730
		An ultrafiltration purified water collector in accordance with claim 1 wherein the lower edge of said first drain is located between 1/4 inch and 4 inches from the bottom of said box.
		One important limitation on ultrafiltration systems is that the ultrafiltration membranes must constantly be maintained in a wet condition because if the membranes are allowed to dry they irreversibly consolidate and lose their permeability.
		Since ultrafiltration water purification systems characteristically involve large volumes of water moving at pressures between 10 and 1,000 psig, the ability to shut the system down when water purification is not needed, such as on weekends or holidays, represents a very large savings in operating cost.
	freepatentsonline.com /4073730.html (3311 words)

	Ultrafiltration Of Milk
		Ultrafiltration of Milk is yet another way of increasing solids ahead of the cheese vat.
		Ultrafiltration is being used to increase the percentage of protein in Fluid milk as a method of fortifying proteins in fluid milk.
		Ultrafiltration is being used to increase the milk solids for the manufacture of Fat Free sour cream.
	www.geafiltration.com /html/market_applications/ultrafiltration_of_milk.html (539 words)

	water purifier Ultrafiltration using membrane technology as compared to Ultra violet water purifiers and water filter
		ultrafiltration membrane filter micro-organisms including their floating dead bodies, cysts and spores from your drinking water by physically filtering them out through a membrane.
		Ultrafiltration membrane is fool proof because water passes through a membrane whose pore size is so small that no bacteria or virus can pass through it.
		Ultrafiltration membrane works on the same principle used by nature to absorb purified water from dirty subsoil water eg.
	www.permionics.com /tech_ultra.htm (421 words)

	Fun Facts about the Ultrafiltration Plant
		The plant has 28 vessels on each ultrafiltration unit, and there are 40 of those units in the new plant.
		One of the 40 water purifying units inside the Ultrafiltration Plant at Columbia Heights.
		Although ultrafiltration removes nearly all viruses from the water supply, a fraction of them cannot be completely screened out.
	www.ci.minneapolis.mn.us /water/plant_funfacts.asp (385 words)

	Ultrafiltration
		Ultrafiltration is a low-pressure membrane process used to separate high molecular weight compounds from a feed stream.
		Ultrafiltration has larger pores than nanofiltration and reverse osmosis and is therefore the least costly of the three to operate.
		Ultrafiltration is useful for the separation of delicate materials since it is a non-denaturing method of separation.
	www.rpi.edu /dept/chem-eng/Biotech-Environ/Projects00/memfilt/ultrafiltration.htm (272 words)

	Installation of Ultrafiltration/Reverse Osmosis System at Automotive Coatings Plant Minimizes Hazardous Waste (Site not responding. Last check: 2007-10-11)
		Ultrafiltration and reverse osmosis are two membrane-based technologies that have been commercially available for decades.
		Then it moves to the ultrafiltration unit where suspended solids and high-molecular-weight particles are removed.
		The smallest impurities are removed in the reverse osmosis unit, which has smaller pore sizes than the ultrafiltration unit.
	es.epa.gov /techinfo/facts/osmosis.html (880 words)

	Single-tube DNA Purification and Cloning Using Ultrafiltration Devices (Site not responding. Last check: 2007-10-11)
		To determine whether ultrafiltration damages or contaminates DNA samples, experiments to test the ability of the DNA to be cleaved by a variety of restriction enzymes were performed.
		In this report we demonstrate that ultrafiltration with Nanosep devices is well suited for the high-yield, rapid recovery of dilute DNA samples without the retention of components that may inhibit biological activity.
		Although ultrafiltration has been shown previously to be an efficient method to purify nucleic acids (2, 4), to our knowledge this is the first report showing the efficacy of ultrafiltration in practical cloning procedures.
	www.pall.com /34696_1212.asp (3642 words)

	Ultrafiltration Membranes
		Ultrafiltration membranes have MWCO's ranging from 100 to 500,000 Daltons.
		Only the layer of semipermeable membrane is in contact with the sample during ultrafiltration.
		Solutes smaller than the MWCO emerge as ultrafiltrate and retained molecules are concentrated on the pressurized side of the membrane.
	www.spectrapor.com /0/7/3.html (152 words)

	Ultrafiltration Theory
		Effective molecular filtration processing requires equipment and operating conditions which minimize the concentration of solutes at the surface of the membrane, and avoid the formation of a gel layer which can obstruct the membrane (concentration polarization).
		In conventional ultrafiltration configurations, the process solution is pressurized, typically from 10 to 70 psi by compressed gas (such as nitrogen) or by a pump system, while in contact with a suitably supported semipermeable membrane.
		Species below the membrane MWCO emerge as ultrafiltrate; retained species are progressively concentrated on the pressurized side of the membrane.
	www.spectrapor.com /4/0/2.html (131 words)

	Millipore - Technical Library - Effect of Centrifugal Ultrafiltration on Large Fragment DNA Integrity
		To be useful, centrifugation must not cause breakage of the DNA during the ultrafiltration procedure.
		As a model system to check for the introduction of single-strand nicks during the ultrafiltration spin, supercoiled Ladder DNA (Gibco-BRL, Gaithersburg, MD) which ranges in size from 2 to 8 kb was used.
		DNA bands in lane 1 (starting material) are indistinguishable from the bands on lanes 2–4, which were spun repeatedly in the ultrafiltration devices.
	www.millipore.com /publications.nsf/docs/6dll8w (943 words)

	Ultrafiltration May Be Practical Alternative to Diuretics - Medgadget - www.medgadget.com
		Ultrafiltration May Be Practical Alternative to Diuretics - Medgadget - www.medgadget.com
		Two new studies, published in the Dec. 6, 2005 issue of Journal of the American College of Cardiology, have documented safety and efficacy of blood ultrafiltration therapy, a procedure that reduces fluid overload in patients with congestive heart failure.
		According to the American College of Cardiology, the procedure that in the past was reserved only as a rescue therapy, can now be administered by hospital RN outside the setting of the intensive care unit.
	www.medgadget.com /archives/2005/12/ultrafiltration.html (514 words)

	Clinical Trial: Management of Compartment Syndrome With Ultrafiltration
		In tissue ultrafiltration, a doctor places hollow probes, or catheters, directly into the muscle compartment in the injured area of the lower leg.
		The human clinical trials are organized as a series of consecutive studies designed to demonstrate the safety and efficacy of ultrafiltration in the management of compartment syndrome (CS).
		The goals of this study are to (1) demonstrate that inserting ultrafiltration (UF) catheters is safe and reproducible; (2) show that CSUF allows for biochemical assessment of cellular function; and (3) show that the CSUF apparatus provides an accurate measurement of intracompartmental pressure.
	clinicaltrials.gov /ct/show/NCT00022815 (867 words)

	Less-invasive ultrafiltration device may be practical alternative to diuretics
		A device that performs ultrafiltration of blood, without requiring specialized nursing care or invasive central intravenous access, can reduce fluid overload in patients with congestive heart failure, according to a new study in the Dec.
		Ultrafiltration bests loop diuretics in acute HF: the FDA-approved device allows fluid to be extracted from a patient's blood at a controlled rate.(Cardiovascular...
		Ultrafiltration promising in decompensated HF: mechanical pump device.(Cardiovascular Medicine): An article from: Internal Medicine News
	www.brightsurf.com /news/headlines/view.article.php?ArticleID=21954 (1144 words)

	Modified Ultrafiltration Reduces Morbidity After Adult Cardiac Operations: A Prospective, Randomized Clinical Trial -- ... (Site not responding. Last check: 2007-10-11)
		A prospective randomized study of a modified technique of ultrafiltration during pediatric open-heart surgery.
		Modified ultrafiltration versus conventional ultrafiltration: a randomized prospective study in neonatal piglets.
		Effect of modified ultrafiltration in high-risk patients undergoing operations for congenital heart disease.
	circ.ahajournals.org /cgi/content/full/104/suppl_1/I-253 (3658 words)

	Ultrafiltration
		Ultrafiltration (UF) is a pressure-driven barrier to suspended solids, bacteria, viruses, endotoxins and other pathogens to produce water with very high purity and low silt density.
		It serves as a pretreatment for surface water, seawater, and biologically treated municipal effluent before reverse osmosis and other membrane systems.
		Ultrafiltration is also used in industry to separate suspended solids from solution.
	www.gewater.com /library/tp/835_Ultrafiltration_.jsp (155 words)

	PROTEIN BIOSEPARATION USING ULTRAFILTRATION
		Ultrafiltration is a pressure-driven, membrane-based separation process, which is used for a broad variety of applications, ranging from the processing of biological macromolecules to wastewater treatment.
		Ultrafiltration is used for protein concentration, desalting, clarification and fractionation (i.e.
		Concentration, desalting and clarification are technologically less demanding and have been in use in the bioprocess industry for some time.
	www.worldscibooks.com /lifesci/p257.html (141 words)

	Reverse Osmosis, Nanofiltration, Ultrafiltration and Microfiltration for Liquid Separation
		Nano-filtration is selected when Reverse Osmosis and Ultrafiltration are not the correct choice for separation.
		Ultrafiltration is a selective fractionation process using pressures up to 145 psi (10 bar).
		Ultrafiltration is widely used in the fractionation of milk and whey, and in protein fractionation.
	www.geafiltration.com /html/technology/ftechnology.html?referrer=Google (228 words)

	Koch Membrane :: Ultrafiltration
		KMS manufactures ultrafiltration membranes in tubular, hollow fiber, spiral and flat sheet membrane configurations.
		For municipal applications, KMS offers hollow fiber ultrafiltration membranes that can be integrity tested to demonstrate that the UF system is retaining bacteria and viruses.
		ultrafiltration modules are submerged in basins of wastewater, and a slight negative pressure draws water through the walls of the fiber from the outside to the inside.
	www.kochmembrane.com /sep_uf.html (926 words)

	Ultrafiltration Membranes (UF Membranes)
		Ultrafiltration (UF) is a separation process using membranes with pore sizes in the range of 0.1 to 0.001 micron.
		Flux of a membrane is defined as the amount of permeate produced per unit area of membrane surface per unit time.
		Ultrafiltration membranes can have extremely high fluxes but in most practical applications the flux varies between 50 and 200 GFD at an operating pressure of about 50 psig in contrast, reverse osmosis membranes only produce between 10 to 30 GFD at 200 to 400 psig.
	www.appliedmembranes.com /ultrafiltration.htm (325 words)

	Sartorius AG: Ultrafiltration
		The solution to be processed is pumped under pressure across an ultrafiltration membrane and then returned to the original reservoir.
		The solution is progressively concentrated or purified as solvent and micro-molecules pass through the membrane into a separate filtrate vessel.
		This technique uses an absorbent cellulose pad mounted behind the ultrafiltration membrane to draw solvents and micro solutes through the membrane.
	www.sartorius.com /index.php?id=453 (410 words)

	Clinical Trial: Outpatient Ultrafiltration Therapy in Heart Failure Patients Trial
		The results from this trial will be useful in planning a larger, randomized trial comparing usual care and ultrafiltration for this patient population in similar ambulatory settings.
		This is a pilot study to assess the feasibility, effectiveness, safety and patient acceptance of ultrafiltration in ambulatory patients with heart failure and hypervolemia.
		Ultrafiltration versus usual care for hospitalized patients with heart failure: the Relief for Acutely Fluid-Overloaded Patients With Decompensated Congestive Heart Failure (RAPID-CHF) trial.
	www.clinicaltrials.gov /ct/show/NCT00319384 (424 words)

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