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M Fiber (m + fiber)

Distribution by Scientific Domains
Medical Sciences50%

Selected Abstracts

The preparation and characterization of fiber reinforced alginate hydrogel

JOURNAL OF APPLIED POLYMER SCIENCE, Issue 5 2008
Yimin Qin
Abstract To prepare fiber reinforced alginate hydrogels, calcium alginate fibers were mixed with aqueous sodium alginate solutions. Tests were carried out to assess the amount of calcium ions released from two types of alginate fibers, i.e., those made from alginate rich in guluronic acid (high G) and in mannuronic acid (high M), respectively. Experimental results showed that more calcium ions were released from the high M fibers and the hydrogel made from the high M fibers had a higher viscosity than that made from high G fibers. The water absorption and donating properties of these hydrogels were assessed by placing them in contact with gelatine gels. The results showed that alginate hydrogels with a high alginate content are capable of absorbing water from gelatine gels, while those with a high water content are able to donate water. When silver containing particles were mixed into the alginate solution, it was also possible to prepare fiber reinforced alginate hydrogel with antimicrobial properties. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 [source]

Laser Lipolysis Using a Novel 1,064 nm Nd:YAG Laser

DERMATOLOGIC SURGERY, Issue 2 2006
KAREN H. KIM MD
BACKGROUND We studied the safety and efficacy of a 1,064 nm Nd:YAG laser with a 300 ,m fiber for the reduction of small unwanted fat areas. METHODS Thirty subjects with focal areas of fat less than 100 cm3 were enrolled. Ten subjects were treated with laser lipolysis and had magnetic resonance imaging (MRI) at baseline and 3 months post-treatment. Ten subjects had laser lipolysis followed by biweekly treatments with the Tri-active system. The last group of 10 subjects served as control. Patients were seen at baseline, 1 week, 1 month, and 3 month follow-up visits. RESULTS Twenty-nine patients completed the study. Self-assessment evaluations reported an improvement of 37% at the 3-month follow-up visit. MRI demonstrated an average 17% reduction in fat volume. Smaller baseline volume areas, such as the submentum, showed better results, suggesting a dose-response relationship. The most common side effects were mild bruising and swelling resolving within 2 weeks. CONCLUSION Laser lipolysis using the 1,064 nm Nd:YAG laser with 300 ,m fiber appears to be a very promising procedure that delivers good, reproducible results safely and effectively. The advantages include excellent patient tolerance, quick recovery time, as well as the benefit of dermal tightening. [source]

Endoscopic ureteral incision using the holmium:YAG laser

INTERNATIONAL JOURNAL OF UROLOGY, Issue 12 2001
HATSUKI HIBI
Abstract Background: We reviewed the results of endoscopic ureteral incision for benign ureteral stricture, ureteropelvic junction obstruction and ureteroenteroanastomotic stricture using the holmium laser. Methods: We carried out endoscopic ureteral incision using the holmium laser through an 8-Fr semirigid or 6.9-Fr flexible ureteroscope on 17 ureters in 15 patients. Balloon dilatation was not necessary before insertion of the ureteroscope. The stricture was incised with the holmium laser using a 200,365 ,m fiber through the working channel of the ureteroscope. After completion of the incision, a 12-Fr double-J catheter was left for 6 weeks. Thereafter patients were followed by renal scan and/or ultrasound and excretory urography at 3,6 month intervals. Results: The mean operative time was 65 min (18,135 min). The stricture resolved completely in 86.7% of cases at an average follow up of 20.5 months (11,32 months). Conclusions: The holmium laser endoscopic ureteral incision was associated with a good outcome in our series. We recommend this procedure to be employed initially because it is less invasive and has a favorable outcome. [source]

High Power Diode Lasers for Industrial Applications

LASER TECHNIK JOURNAL, Issue 3 2007
Wolfgang Horn
New wavelengths, high brightness and increasing reliability are breaking new ground for diode lasers. The higher brightness allows direct fiber coupling of several 100 W in 200 ,m and 400 ,m fibers and therefore i.e. the pumping of fiber lasers. Such high power fiber coupled laser diodes combined with fast beam deflection units (galvo scanners) have been implemented in industrial processes and used for quasi-simultaneous welding of polymers, heat treatment in the sub millimeter range or selective soldering in solar cell production. Besides pumping of solid state lasers, high power diode lasers become more and more a competitive tool for many applications in material processing. [source]