• Objective To compare the active management of term prelabour rupture of membranes with oral misoprostol with conservative management for 24 hours followed by induction with oxytocin or prostaglandin E-2 (PGE(2)) gel. (elsevier.com)
  • Methods The women were randomised to 50 mug of oral misoprostol repeated every 4 hours, if required, to a maximum of five doses (active group), or to induction of labour with PGE2 gel or oxytocin only if not in spontaneous labour 24 hours after prelabour rupture of membranes (conservative group). (elsevier.com)
  • Main outcome measures Number of women in active labour within 24 hours of the prelabour rupture of membranes, preference of women for any one particular method of management in any subsequent pregnancy with prelabour rupture of membranes. (elsevier.com)
  • Results 93.3% of the active group and 54.8% of the conservative group were in spontaneous labour within 24 hours of the prelabour rupture of membranes (RR 1.7, 95% CI 1.2 to 2.4). (elsevier.com)
  • Of those achieving a vaginal delivery, 72% of the active group did so within 24 hours of the prelabour rupture of membranes as compared with 26.9% of the conservative group (RR 2.7, 95% CI 1.4 to 5.3, P = 0.002). (elsevier.com)
  • Conclusions Active management with oral misoprostol resulted in more women going into labour and delivering within 24 hours of the prelabour rupture of membranes with no increase in maternal or neonatal complications. (elsevier.com)
  • Women tended to view active management of prelabour rupture of membranes more positively. (elsevier.com)
  • Recently, plasma membrane calcium ATPase 4 (PMCA) has been established as a novel mediator of angiogenesis through its role in endothelial cell migration and tubule formation. (bmj.com)
  • There is evidence that the effecter of this hyperpolarization is the plasma membrane calcium ATPase (PMCA), that when activated, expels Ca2+ from the cell. (uvm.edu)
  • The general approach of the solution-diffusion model is to assume that the chemical potential of the feed and permeate fluids are in equilibrium with the adjacent membrane surfaces such that appropriate expressions for the chemical potential in the fluid and membrane phases can be equated at the solution-membrane interface. (wikipedia.org)
  • The feed to the membrane is separated into an organic rich fraction in the retentate and a water rich fraction in the permeate. (aiche.org)
  • Then, permeate flowing out of the filtering membrane portion is supplied to the apparatus. (freepatentsonline.com)
  • Apart from the permeate, concentrate flows out of the filtering membrane portion. (freepatentsonline.com)
  • This new membrane allows water vapor to permeate across the membrane at high fluxes, at the same time blocking air penetration and resulting in high selectivity. (energy.gov)
  • The baggy implantation material which contains a gel or liquid suffers from the disadvantage that its contents, e.g., the silicone gel, may permeate through the membrane into the living organism, causing the connective tissue surrounding the prosthesis to become tylotic, and then shrink. (google.es)
  • In the membrane field, the term module is used to describe a complete unit composed of the membranes, the pressure support structure, the feed inlet, the outlet permeate and retentate streams, and an overall support structure. (wikipedia.org)
  • Spiral Wound, where a flexible permeate spacer is placed between two flat membranes sheet. (wikipedia.org)
  • The plate supports the membranes and provides a channel for the permeate to flow out of the unit module. (wikipedia.org)
  • The solvent recovery depends on the permeability of the membrane to the solvent and the purity required in the solvent-rich fraction. (aiche.org)
  • In general, mechanical separation processes for separating gaseous or liquid streams use membrane technology. (wikipedia.org)
  • Membrane separation processes operate without heating and therefore use less energy than conventional thermal separation processes such as distillation , sublimation or crystallization . (wikipedia.org)
  • Cold separation using membrane technology is widely used in the food technology , biotechnology and pharmaceutical industries. (wikipedia.org)
  • Furthermore, using membranes enables separations to take place that would be impossible using thermal separation methods. (wikipedia.org)
  • Depending on the type of membrane, the selective separation of certain individual substances or substance mixtures is possible. (wikipedia.org)
  • separation technique in which a semipermeable membrane is placed between two solutions containing the same solvent. (britannica.com)
  • BASF has developed a proton-conductive membrane that can be used at temperatures of up to 180°C for robust fuel cell systems and more efficient separation of hydrogen from gas mixtures. (basf.com)
  • Cyclical operation, various impurities in the gas flow, and changing application conditions can all stress the materials used in high-temperature polymer electrolyte membrane (PEM) fuel cells and electrochemical hydrogen separation systems. (basf.com)
  • However, its use in separation membrane engineering is relatively new. (bath.ac.uk)
  • Director of the Centre for Advanced Separations Engineering at the University of Bath, Dr Darrell Patterson, commented: "This review is the first to explore the possibility and challenges of using 3D printing for producing separation membranes. (bath.ac.uk)
  • Molecular Separation by using membranes has proven to be one of the most energy efficient routes to separate gases and liquids on nano scale. (utwente.nl)
  • The membranes will be tested for their gas permeation and separation capacities. (utwente.nl)
  • A method is described of producing a composite oxygen ion membrane and a composite oxygen ion membrane in which a porous fuel oxidation layer and a dense separation layer and optionally, a porous surface exchange layer are formed on a porous support from mixtures of (Ln.sub.1-xA.sub.x).sub.wCr.sub.1-yB.sub.yO.sub.3-.delta. (osti.gov)
  • Based on application, the global Pharmaceutical Membrane Filtration Market is segmented into final product processing, raw material filtration, cell separation, water purification, and air purification. (prnewswire.com)
  • In animals , the cell membrane establishes this separation alone, whereas in yeast , bacteria and plants , an additional cell wall forms the outermost boundary, providing primarily mechanical support. (newworldencyclopedia.org)
  • is in contact with a semipermeable membrane -i.e., a thin, porous wall whose porosity is such that some, but not all, of the components in the liquid mixture can pass through the wall. (britannica.com)
  • A porous composite membrane is provided comprising a film of porous, expanded polytetrafluoroethylene whose surfaces, both exterior and within its pores, are coated with a metal salt of a perfluoro-cation exchange polymer. (google.es)
  • All living cells, prokaryotic and eukaryotic, have a plasma membrane that encloses their contents and serves as a semi-porous barrier to the outside environment. (fsu.edu)
  • The researchers have successfully developed such membrane which consists of small compartments with a diameter of about half a millimetre, where the islets can be cultured without aggregating, and a porous lid. (utwente.nl)
  • The principal types of membrane modules are: Tubular, where membranes are placed inside a support porous tubes, and these tubes are placed together in a cylindrical shell to form the unit module. (wikipedia.org)
  • Toxic Chemicals as Molecular Probes of Membrane Structure and Function Each paper is generally concluded by an edited discussion which contains many useful and interesting additional insights in each subject area. (springer.com)
  • The RBC membrane provides a perfect example to study the impact of membrane barriers on molecular motion. (springer.com)
  • The molecular questions that require clarification and their solutions bridge the many divides between the fundamental physical chemistry of macromolecular polyelectrolytes and the supramolecular chemistry of membrane assemblies related to cell biology as well as drug development and synthetic biology. (rsc.org)
  • Synder offers an extensive and growing range of spiral-wound Ultrafiltration (UF) membrane Molecular Weight Cut-Offs. (synderfiltration.com)
  • Synder Filtration's extensive line of polymeric Ultrafiltration membranes have a molecular weight cutoff (MWCO) ranging from 1kD-500kD. (synderfiltration.com)
  • The NFX, NFW, & NFG membranes encompass molecular weight cutoffs (MWCO) from 150-800Da and have typically displayed better rejection and greater flux than the leading competitor. (synderfiltration.com)
  • Membrane technology potentially offers lower energy, more sustainable molecular separations that can be applied to a wide range of gas and liquid separations. (bath.ac.uk)
  • K.R. Fath and D.R. Burgess , The Role of the Cytoskeleton and Molecular Motors in Transport between the Golgi Complex and Plasma Membrane. (elsevier.com)
  • R.R. Dubreuil , Molecular and Genetic Dissection of the Membrane Skeleton in Drosophila. (elsevier.com)
  • The presence of cholesterol and glycolipids, which are found in most cell membranes, can also affect molecular dynamics and inhibit phase transitions. (fsu.edu)
  • The optical spectra of molecular membrane probes can be interpreted terms of the structure, dynamics, and the physiological state of the membrane. (worldcat.org)
  • For instance, in the case of mamma prosthesis, the permeation is reduced by gelling or polymerizing the silicone oil in the silicone rubber membrane bag so as to decrease permeable low-molecular weight silicone. (google.es)
  • Studies of membrane biology in the Biochemistry and Molecular Pharmacology (BMP) department reflect the complicated nature of studying these intriguing macromolecular structures. (umassmed.edu)
  • By applying advanced solid-state NMR approaches, we will be able to provide structural insight into the molecular mechanism by which the survival membrane protein Bcl-2 and its antagonist, the cell-killing Bax protein, interact with each other at the mitochondrial membrane and thereby determine the fate of the cell. (weizmann.ac.il)
  • Permeation occurs when a substance moves through the membrane from a region of high concentration to a region of low concentration, a process called diffusion. (encyclopedia.com)
  • The high selectivity of the membrane translates to less energy use, while the high permeation fluxes result in a more compact device. (energy.gov)
  • In addition, silicones are used for gas permeation membranes of pump-oxygenators and soft contact lenses, by virtue of their outstanding compatibility with living organisms, stability, and gas permeability. (google.es)
  • PTFE membranes are used with ethanol _vapour_ in a lab process to determine alcohol concentration. (halfbakery.com)
  • Can you provide a link demonstrating that even an ideal PTFE membrane will do as you suggest? (halfbakery.com)
  • On the basis of product, the market has been segmented into MCE membrane filters, coated cellulose acetate membrane filters, nylon membrane filters, PTFE membrane filters, PVDF membrane filters, and other membrane filters. (prnewswire.com)
  • Research on the study of membrane toxicity has advanced a great deal in a relatively short period of time, prompting scientists to re-examine the problems associated with carriers, receptors and reactors to toxic substances. (springer.com)
  • Effects of Membranes and Receptors 4. (springer.com)
  • The protein components of cell membranes may function as channels or transporters across the membrane or as receptors of biochemical information. (newworldencyclopedia.org)
  • Information from state-of-the-art imaging technology will enable development of a new generation of drugs with reduced side effects by virtue of targeting receptors in their unique membrane environment. (nottingham.ac.uk)
  • The membrane that surrounds a cell's cytoplasm , separating it from the environment . (everything2.com)
  • The plasma membrane separates the cytoplasm and the interior components of the cell from its outside environment, and it functions as a selectively permeable wall that allows certain substances to enter the cell, while keeping others out. (reference.com)
  • The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives. (elsevier.com)
  • handle ) of the malleus is firmly attached to the medial surface of the membrane as far as its center, drawing it toward the tympanic cavity . (wikipedia.org)
  • The lateral surface of the membrane is thus concave. (wikipedia.org)
  • For example, it is impossible to separate the constituents of azeotropic liquids or solutes which form isomorphic crystals by distillation or recrystallization but such separations can be achieved using membrane technology. (wikipedia.org)
  • This work is part of the University's Centre for Advanced Separations Engineering (CASE) and is the first time the properties of different 3D printing techniques available to membrane fabrication have been assessed. (bath.ac.uk)
  • Membrane technology covers all engineering approaches for the transport of substances between two fractions with the help of permeable membranes . (wikipedia.org)
  • Paul Andersen explains how cells are selectively permeable with the help of their cell membrane. (youtube.com)
  • As a semi-permeable barrier, the cell membrane maintains an essential balance between individual distinctness and communal interaction: it functions to retain key components of the cell and to keep out toxic or unwanted substances, while selectively controlling the flow of nutrients and biochemical signals into the cell. (newworldencyclopedia.org)
  • Note that a semipermeable membrane is not the same as a selectively permeable membrane. (wikipedia.org)
  • Semipermeable membrane describes a membrane that allows some particles to pass through (by size), whereas the selectively permeable membrane "chooses" what passes through (size is not a factor). (wikipedia.org)
  • The diffusion of water through a selectively permeable membrane is called osmosis .This allows only certain particles to go through including water and leaving behind the solutes including salt and other contaminants. (wikipedia.org)
  • Prof. Sidney Loeb and Srinivasa Sourirajan invented the first practical synthetic semi-permeable membrane. (wikipedia.org)
  • This book's inter-disciplinary approach for theoreticians and experimentalists for future cross-fertilization of understanding and developments in the areas of membranes including polymer technology and green chemistry applications. (worldcat.org)
  • 2. The composite membrane of claim 1 wherein said perfluoro-cation exchange polymer is perfluorosulfonic acid polymer. (google.es)
  • 7. The composite membrane of claim 1 wherein said perfluoro-cation exchange polymer has an equivalent weight less than 1000. (google.es)
  • 9. The composite membrane of claim 1 wherein the weight fraction of perfluoro-cation exchange polymer exceeds 0.08, based upon the total weight of the composite. (google.es)
  • 11. The composite of claim 10 wherein the air flow is between 12 seconds and 22 seconds, the thickness of said composite membrane is between 1.7 mils and 3 mils and the weight fraction of perfluoro-cation exchange polymer exceeds 0.12, based upon the total weight of the composite. (google.es)
  • Led by Yushan Yan, Distinguished Professor of Engineering, the research at UD will focus on creating a series of polymer-based hydroxide exchange membranes (HEMs). (udel.edu)
  • Our goal is to develop a process to easily synthesize the polymer at scale, creating large area membranes for testing that are thinner than human hair. (udel.edu)
  • 1. An implantable impermeable laminate membrane bag for use in living organisms comprising a laminate of at least one membrane of a cured dimethylsiloxane polymer and at least one membrane of a vinylidene fluoride-hexafluoropropylene-based fluororubber. (google.es)
  • 2. The impermeable laminate membrane bag according to claim 1, further comprising an additional membrane of the cured dimethylsiloxane polymer. (google.es)
  • 3. The impermeable laminate membrane bag according to claim 1 or 2 wherein the membrane of the vinylidene fluoride-hexafluoropropylene-based fluororubber is interposed between the two membranes of the cured dimethylsiloxane polymer. (google.es)
  • Commercial water desalination makes use of thin composite membranes that feature an ultrathin layer of a polyamide film full of pores. (eurekalert.org)
  • Patients suffering from tympanic membrane rupture may experience bleeding, tinnitus , hearing loss , or disequilibrium ( vertigo ). (wikipedia.org)
  • Extracorporeal membrane oxygenation (ECMO) is a specialized type of life support for the heart and lungs. (massgeneral.org)
  • Extracorporeal membrane oxygenation (ECMO) is a specialized type of life support that can provide circulation and oxygenation when the heart and lungs are not working. (massgeneral.org)
  • These results indicate that the first transmembrane segment generally comprises the signal that links ribosomes to thylakoid membranes for cotranslational integration. (pnas.org)
  • 6. The membrane of claim 1 wherein the coupler comprises the carbonyl groups, sulfonyl groups, or combination thereof bonded together through an organic radical wherein the organic radical is a C 2-20 saturated or unsaturated aliphatic, aromatic, or aliphatic-aromatic group that is substituted or unsubstituted with halogen or C 1-4 alkyl, alkoxy, or carboxy and has 0-5 heteroatoms wherein the heteroatom is oxygen, sulfur, or nitrogen. (google.com)
  • Membrane switch assembly comprises a transparent laminate comprised of three sheets of cellulose acetate material. (google.ca)
  • In accordance with an aspect of the present invention, the impermeable laminate membrane comprises a laminate of at least a silicone rubber membrane and a fluororubber membrane. (google.es)
  • What comprises a plasma membrane? (reference.com)
  • The membrane skeleton comprises a hexagonal network of α‐ and β‐spectrin peptides intertwined to form a strong but flexible scaffold. (els.net)
  • Fujiwara T, Ritchie K, Murakoshi H, Jacobson K, Kusumi A (2002) Phospholipids undergo hop diffusion in compartmentalized cell membrane. (springer.com)
  • The first international consensus on mucous membrane pemphigoid was published in 2002. (medscape.com)
  • A semipermeable membrane is a selective barrier, and many such barriers are found in plants and animals. (britannica.com)
  • In the biotech and pharmaceutical industries, MF membranes offer the safety of a physical barrier to remove bacteria and other microbes. (synderfiltration.com)
  • Although the placental membrane is often referred to as the placental barrier , many substances, both helpful and harmful, can cross it to affect the developing embryo. (umich.edu)
  • This book presents current research on the responses of membranes to toxic sub- stances both by direct observation of macromolecules reacting with these substances and by inference from data on the bio- chemical responses of cells and cell fractions. (springer.com)
  • The first area is the effect of various toxic substances on membrane structure and function. (springer.com)
  • The second area is where the membrane serves as the site of rate limiting step of the transport of various toxic substances. (springer.com)
  • The membrane acts as a boundary, holding the cell constituents together and keeping other substances from entering. (fsu.edu)
  • The function of the nuclear membrane in an animal cell is to hold the DNA inside the nucleus in order to protect it from surrounding substances. (reference.com)
  • The present invention relates to a membrane remover/etchant solution including an organic solvent, a strong ionizable acid, a weak acid and an acid stable surfactant. (google.com)
  • The invention relates to a membrane support system which applies tension to the membrane of a sound producing or sound receiving device, such as a speaker or a microphone, respectively. (google.co.uk)
  • The present invention relates to a membrane filtration system which is equipped with a filtering membrane portion for removing impurities in feed water and which returns a part of concentrate from the filtering membrane portion to an upstream side of the filtering membrane portion and discharges a remainder of the concentrate. (freepatentsonline.com)
  • Hydrothermally stable hybrid membranes have been successfully fabricated starting from 1,2-bis(triethoxysilyl)ethane (BTESE) using 'sol-gel chemistry' (process scheme of a sol-gel process is given in the figure). (utwente.nl)
  • Depending on the membrane and the solute, permeability may depend on solute size, solubility , properties, or chemistry. (wikipedia.org)