No abstract available.
Membranes*

No abstract available.
Membranes* ; Rupture*

No abstract available.
Membranes* ; Polytetrafluoroethylene*

The extracellular proteins bound with the membrane through the sites of glucosyl-phosphat idylinositol (GPI) to generate the complexes of protein with GPI. The GPIs have concentrated structure to generate glycolipid rich sites in the membrane. These sites have inert property with detergent. The GPI bound extracellular proteins can transmit the sign to cells. This sign is the same as this transmitted from receptor MD. The exist of structure GPI may be an example of the concentration of many suitable molecules which intact mutually to implement optimal a function. These GPI related with the costimulation phenomena and their play likes as a synapse MD
Membranes ; Proteins

A rare case of binocular polycoria due to extensive persistence of the pupillary. membrane was reported. Central visions of both eyes in this case were not disturbed because of the presentation of few holes in the thick pupillary membranes.
Membranes* ; Telescopes*

No abstract available.
Membranes* ; Rupture*

No abstract available.
Humans* ; Membranes*

Membrane creates the functions of protection, supporting, dispersion and separation. More functions can be designed by modifying membrane surface and grafting/loading selective ligands or catalysts on the membrane, thus membrane technology has been widely applied in biological detection, and its application approaches becomes diverse. Rational design of functional membranes can meet the demands in different steps of biological detection process, including sample pretreatment, preparation, response and sensing. This review summarized the functionalization methods of filtration membranes, applications of membrane technology in sample preparation and detection process, as well as the research on the integration of functional membranes. By revisiting the research progress on functional membrane design, preparation and applications for biological detection, it is expected to take better advantage of membrane materials structure and performance for constructing efficient and stable detection platform, which is more "adapted" to the detection environment.
Membranes, Artificial

BACKGROUND/AIMS: Insertion of self-expanding metallic stents (SEMS) has become an established option for the palliation of malignant biliary obstruction (MBO). However, stent occlusion by tumor ingrowth is still an unsolved problem. To overcome this problem, membrane-covered SEMSs have been developed. The purpose of this study was to compare the effectiveness of membrane-covered SEMS versus plastic stent in the treatment of MBO. METHODS: Between Jan 2001 and Jul 2002, 57 patients with unresectable MBO who initially had plastic stents inserted were randomized to receive either plastic stent and membrane-covered SEMSs after initial plastic stent failure. RESULTS: Placement of either plastic stents or membrane-covered SEMs was successful in all patients. Mean patency duration of stents were significantly longer in membrane-covered SEMS group (189 days) than in plastic stent group (82 days) (p=0.01). The causes of stent failure were occlusion in 10 cases and migration in 1 case in membrane-covered SEMS group. Of these occluded 10 cases, tumor ingrowth was noted in 7, tumor overgrowth in 2, and biliary incrustation in 1. CONCLUSIONS: Membrane-covered SEMS has a longer patency than plastic stent. However, new membrane covering material is needed to prevent tumor ingrowth more effectively.
Humans ; Membranes ; Plastics* ; Stents*

A new method is presented for removal of secondary membranes using a cryomicroprobe. In all 11 cases reported, membranes were removed intact as one piece. There were no complications at surgery or afterwards.
Capsule Opacification* ; Cryosurgery* ; Membranes