خبر - صفحه 184 از 192 - پلیم‌پارت
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    امروز  دوشنبه - ۲ اردیبهشت - ۱۳۹۸  
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مرجع پلیمر در بازار ایران: کمیسیون آموزش انجمن ملی صنایع پلاستیک ایران، تلاش دارد تا با آغاز سال جدید، همایشی با هدف ایجاد تصویر اولیه از چشم‌انداز حاکم بر کسب و کار صنعت پلاستیک (شمای کلی کسب  کار از صنعت پلاستیک)، ایجاد بستر ارتباطی بین سطح کلان تصمیم گیری اقتصادی کشور با بخش خصوصی فعال در صنعت پلاستیک به منظور اصلاح تصمیمات و سیاستهای اقتصادی تاثیرگذار در این صنعت و همچنین ایجاد مکانیزم ارتباطی بین دانشجویان حوزه ...

Oxidants found within living organisms are byproducts of metabolism and are essential to wound-healing and immunity. However, when their concentrations become too high, inflammation and tissue damage can occur. University of Illinois engineers have developed and tested a new drug-delivery system that senses high oxidant levels and responds by administering just the right amount of antioxidant to restore this delicate balance. Many pharmaceuticals include specialized polymers and particles that control the timing or concentration of the drug released once administered, the researchers said. However, these additives can hamper crystallization during the manufacturing phase of some drugs—like antioxidants—causing them to dissolve in the body in an ...

A HYDROGEL has been developed that can bend, twist, or stick together when exposed to certain solutions, and could be used to create LEGO-style hydrogel blocks for microfluidics. Hydrogels solidify when they become crosslinked, and these crosslinked polymers are held together by either covalent or ionic bonds. Covalent bonds are strong but irreversible, so that conventional hydrogels with covalent crosslinking are stable and can be turned into complex shapes, but they don’t respond to stimuli and exhibit poor adhesion. Polymers with ionic bonds are weaker and the bonds can be reversed, leading to hydrogels that exhibit adhesion and have some flexibility, but lack structural integrity. Now, researchers at Brown University, US, have created a dual polymer ...


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