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تعداد نتایج: 868495 فیلتر نتایج به سال:
Curative resection for colorectal cancer in the elderly. Prognostic factors and five-year follow-up.
The purpose of this perspective study was to evaluate which prognostic factors predict long-term survival and disease-free survival (DFS) of elderly patients (> or = 65 years) who underwent surgery for colorectal carcinoma. Between January 1992 and December 1998, 196 colorectal cancer patients > or = 65 years (114 M; 82 F; mean age: 75 years; range: 65-92) underwent surgery. One hundred forty-f...
It is believed that the crucial step towards preparation of electrical conductive polymer-carbon nanotube (CNT) composites is dispersing CNTs with a high length-to-diameter aspect ratio in a well-aligned manner. However, this process is extremely challenging when dealing with long and entangled CNTs. Here in this study, a new approach is demonstrated to fabricate conductive polymer-CNT composit...
We present new evolutionary synthesis models of M 82 based mainly on observations consisting of near-infrared integral field spectroscopy and mid-infrared spectroscopy. The models incorporate stellar evolution, spectral synthesis, and photoionization modeling, and are optimized for λ = 1 − 45 µm observations of starburst galaxies. The data allow us to model the starburst regions on scales as sm...
To improve the efficiency of direct laser deposition (DLD) metal powders, a concentrated powder-stream distribution is required, which can be affected by shape powder-delivery nozzle. In this study, simplified, powder particle–wall collision-based 3D numerical model flow in nozzle was used to simulate influences nozzle-exit on concentration stream distribution, characterized its diameter. The p...
this study examined the spawning characteristics and distribution of mullus barbatus and upeneus moluccensis in babadillimani bight, in the northeastern mediterranean (near mersin, turkey) between of may 1999 and april 2000. sampling was carried out monthly at depths of 0-50 m, 50-100 m and >100 m using commercial trawl net mesh size 22 mm knot to knot. the results showed no difference between ...
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