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Good Flow (good + flow)
Selected AbstractsSynthesis and rheological characterization of graft copolymers of butyl and hydroxyethyl methacrylates on starchesJOURNAL OF APPLIED POLYMER SCIENCE, Issue 6 2008Mariló Gurruchaga Abstract To study the possibility of using some acrylic-grafted polysaccharides as matrix tablets, graft copolymers of butyl methacrylate and hydroxyethyl methacrylate on starch and on hydroxypropyl starch were synthesized. In this work, the effects of the different chemical compositions of the various synthesized graft copolymers on the hydrophilicity and rheological characteristics were examined. Water absorption values that ranged from 5 to 45% were obtained. Rheological testing determined with dispersions (5% w/w) in water showed that the graft copolymers formed weak gels of high viscosity. Moreover, the synthesized powders showed good flow and good compaction. These measurements pointed toward the possibility of their application for drug release. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 [source] Robotic Surgery Using ZeusÔ MicroWristÔ TechnologyJOURNAL OF CARDIAC SURGERY, Issue 1 2003The Next Generation Methods: We used the ZeusÔ (Computer Motion Inc., Goleta, Calif, USA) telemanipulation system to perform the internal mammary artery (IMA) takedown in 56 patients, in 12 of whom we used the newest model with MicroWristÔ (Computer Motion Inc., Goleta, Calif, USA) technology. Port orientation was based on thoracic anatomy, the decisive landmarks being the mammillary line and the axillary line. The distance between ports was at least 9 cm, and the patient's arm was positioned with the left shoulder raised and angulated by not more than 90 degrees. Results: Mean setup time was 44 ± 18 minutes for the first five patients and 16 ± 7 minutes for the last five patients, with an overall average of 24 ± 12 minutes. IMA harvest time at the beginning reached a mean of 95 ± 23 minutes and decreased to 44 ± 18 minutes in the last five cases. Average IMA takedown time was 58 ± 17 minutes. The IMA was patent with a good flow in all 56 patients. Conclusions: The introduction of robotic technology into clinical routine has resulted in safe procedures with a short learning curve. However, basic training in the modality is a must in order to achieve technical excellence. (J Card Surg 2003; 18:1-5) [source] Visible light initiated polymerization of styrenic monolithic stationary phases using 470,nm light emitting diode arraysJOURNAL OF SEPARATION SCIENCE, JSS, Issue 1 2010Zarah Walsh Abstract Poly(styrene- co -divinylbenzene) monolithic stationary phases have been synthesized for the first time by photoinitiated polymerization. An initiator composed of (+)-(S)-camphorquinone/ethyl-4-dimethylaminobenzoate/N- methoxy-4-phenylpyridinium tetrafluoroborate was activated using a 470,nm light emitting diode array as the light source. Spatially controlled polymerization of styrenic monoliths has been achieved within specific sections of a 100,,m id polytetrafluoroethylene-coated fused-silica capillary using simple photo masking. The sharpness of the edges was confirmed by optical microscopy, while SEM was used to verify a typical porous, globular morphology. Flow resistance data were used to assess the permeability of the monoliths and they were found to have good flow through properties with a flow resistance of 0.725,MPa/cm at 1,,L/min (water, 20°C). Conductivity profiling along the length of the capillary was used to assess their lateral homogeneity. Monoliths which were axially rotated during polymerization were found to be homogeneous along the whole length of the capillary. The monolithic stationary phases were applied to the RP gradient separation of a mixture of proteins. Column fabrication showed excellent reproducibility with the retention factor (k) having a RSD value of 2.6% for the batch and less than 1.73% on individual columns. [source] Arterial anastomosis in a pediatric patient receiving a right extended split liver transplant: A case reportPEDIATRIC TRANSPLANTATION, Issue 4 2009Roberto Verzaro Abstract:, We report a case of a pediatric patient who received a right-extended liver transplant. The size of the recipient hepatic artery did not match with the donor right hepatic arterial stump. Moreover, recipient arterial anatomy made the direct anastomosis difficult or at increased risk for complications. The recipient's splenic artery was then mobilized, divided and anastomosed to the donor's right hepatic artery. The spleen was preserved and revascularization through collaterals is demonstrated by Angio CT Scan. Doppler US of the transplanted liver demonstrated good flow through the liver and the patient was discharged with perfect liver function. Splenic artery is perfectly suited for hepatic artery anastomosis. The use of splenic artery is favored in particular situations as in the case of a pediatric recipient receiving a right-extended liver graft with small caliber artery. [source] | ||||||||||