Internal occlusion

If a linear mbber is used as a feedstock for the mass process (85), the mbber becomes insoluble in the mixture of monomers and SAN polymer which is formed in the reactors, and discrete mbber particles are formed. This is referred to as phase inversion since the continuous phase shifts from mbber to SAN. Grafting of some of the SAN onto the mbber particles occurs as in the emulsion process. Typically, the mass-produced mbber particles are larger (0.5 to 5 llm) than those of emulsion-based ABS (0.1 to 1 llm) and contain much larger internal occlusions of SAN polymer. The reaction recipe can include polymerization initiators, chain-transfer agents, and other additives. Diluents are sometimes used to reduce the viscosity of the monomer and polymer mixture to faciUtate processing at high conversion. The product from the reactor system is devolatilized to remove the unreacted monomers and is then pelletized. Equipment used for devolatilization includes single- and twin-screw extmders, and flash and thin film evaporators. Unreacted monomers are recovered for recycle to the reactors to improve the process yield. 

Speakman TJ (1964) Internal occlusion of a carotid-cavernous fistula. J Neurosurg 21303-305... 

Figure 9-6T. (Top) Cascade Mini-Ring, (metal and plastic). Originally used by permission of Mass Transfer, Inc., now, Glitsch, Inc. (middle and bottom) Elevation and plan views of Ballast rings (right) and Cascade Mini-Rings (left). Note how high aspect ratio of former permits occlusion of interior surfaces. Low aspect ratio of Cascade Mini-Rings, on the other hand, favors orientation that exposes internal surfaces for excellent film formation, intimate mixing, and gas-liquid contact. Used by permission of Glitsch, Inc. Bull. 345.

The inward rectifier K+ channels (Kir) represent this family of channels that conduct K+ ions preferentially in the inward direction than outward. The occlusion of internal vestibule oftheporeby Mg2+ and polyamines contribute to this inward rectification. These channels... 

William Eugene Parham, Treasurer and member of the Board of Directors and of the Advisory Board of Organic Syntheses, died May 21, 1976 of a coronary occlusion near his summer home on Deer Lake, near Deer River, Minnesota, at the age of 53. Dr. Parham joined the Board of Editors on September 7, 1958 and served as Editor-in-Chief of Volume 44 of Organic Syntheses in 1964. He became a member of the Advisory Board and was elected to the Board of Directors in 1966, and served as Vice President from 1969 to 1974, at. which time he succeeded Richard S. Schreiber as Treasurer. As Treasurer, Dr. Parham was very effective in securing competent legal counsel for Organic Syntheses and in clarifying its foundation tax status with the Internal Revenue Service. 

Internal Carotid Artery Occlusion Acute stroke due to a distal ICA T (T = terminus) occlusion carry a much worse prognosis than MCA occlusions. In a recent analysis of 24 consecutive patients (median NIHSS 19) presenting with T occlusions of the ICA who were treated by lAT using urokinase at an average of 237 minutes from symptom onset, only four patients (16.6%) had a favorable outcome at 3 months. Partial recanalization of the intracranial ICA was achieved in 15 (63%), of the MCA in 4 (17%), and of the ACA in 8 patients (33%). Complete recanalization did not occur. The presence of good leptomeningeal collaterals and age <60 years were the only predictors of a favorable clinical outcome. New treatment strategies, such as the combination of IV rt-PA and lAT, or the use of new mechanical devices may improve the outcome in these patients. 

A significant neurologic deficit expected to result in long-term disability, and attributable to large vessel occlusion (basilar, vertebral, internal carotid, or middle cerebral artery M1 or M2 branches). 

Arnold M, Nedeltchev K, Mattie HP, Loher TJ, Stepper F, Schroth G, Brekenfeld C, Sturzenegger M, Remonda L. Intra-arterial thrombolysis in 24 consecutive patients with internal carotid artery T occlusions. J Neurol Neurosurg Psychiatry 2003 74 739-742. 

Zaidat OO, Suarez Jl, Santillan C, Sunshine JL, Tarr RW, Paras VH, Selman WR, Landis DM. Response to intra-arterial and combined intravenous and intra-arterial thrombolytic therapy in patients with distal internal carotid artery occlusion. Stroke 2002 33 1821-1826. 

Jovin TG, Gupta R, Uchino K, Jungreis CA, Wechsler LR, Hammer MD, Tayal A, Horowitz MB. Emergent stenting of extracranial internal carotid artery occlusion in acute stroke has a high revascularization rate. Stroke 2005 36 2426-2430. 

Touho H, Morisako T, Hashimoto Y, Karasawa J. Embolectomy for acute embolic occlusion of the internal carotid artery bifurcation. Surg Neurol 1999 51 313-320. 

The expansion of our knowledge of the structure and function of Na,K-ATPase is reflected in a rapid succession of reviews on Na,K-ATPase genes and regulation of expression [17], subunit assembly and functional maturation [20], the isozymes of Na,K-ATPase [18], and the stability of a subunit isoforms during evolution [21], physiological aspects and regulation of Na,K-ATPase [22], reconstitution and cation exchange [23], chemical modification [24], and occlusion of cations [25]. Other valuable sources are the review articles [26] and recent developments [27] reported at the International Na,K-pump Conference in September 1990. 

Fig. 7. Two possible interpretations of the transitions of the translocator domain detected by the kinetics of binding to ISO membranes at 4°C. (A) Translocation. The states not in contact with the external medium are the states in contact with the internal medium. (B) Occlusion. The binding sites can be in a state where they are not accessible from either side of the membrane. The spots represent the substrate molecule, cyt and per represent the cytoplasmic and periplasmic side of the enzyme, respectively.

Maroko, P.R. and Braunwald, E. (1973). Modification of myocardial infarction size after coronary occlusion. Ann. Intern. Med. 79, 720-733. 

Coronary artery bypass graft surgery Thoracic surgery whereby parts of a saphenous vein from a leg or internal mammary artery from the arm are placed as conduits to restore blood flow between the aorta and one or more coronary arteries to bypass the coronary artery stenosis (occlusion). 

Ghilardi G, Biondi ML, Turri O, Guagnellini E, Scorza R. Internal carotid artery occlusive disease and polymorphisms of fractalkine receptor CX3CR1 a genetic risk factor. Stroke 2004 35(6) 1276-1279. 

If the guest molecule is assumed to be confined, in the thermodynamic sense, within a particular cavity, if the internal vibrational and rotational states of the molecule are unaltered by occlusion, and if the potential field within a cavity is sufficiently uniform so that the movement of the molecule within the cavity can be represented as three-dimensional translation within the free volume of the cavity (), then the appropriate expression for the ratio of partition functions becomes simply... 

Degertekin M, Sonmez K, Gencbay M, et al. Heparin-coated stent implantation in chronic total occlusion. 3rd International Congress on Coronary Artery Disease, Lyon, France, Oct 2-5, 2000 67. 

I Verstraete M, Vermlen J, Donati MB, The effect of streptokinase infusion on chronic arterial occlusions and stenoses, Ann Intern Med I 971 74 377-382. 

Ostermayer SH, Reisman M, Kramer PH, et al. Percutaneous left atrial appendage transcatheter occlusion (PLAATO system) to prevent stroke in high-risk patients with non-rheumatic atrial fibrillation Results from the international multi-center feasibility trials. J Am Coll Cardiol 2005 46( I ) 9-14. 

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