نتایج جستجو برای: transparent plastic
تعداد نتایج: 87061 فیلتر نتایج به سال:
First, some basic notions of transparent intensional logic (TIL) are introduced. Secondly, it is studied how natural-language interrogatives are analyzed in TIL.
background: sun protection materials have been one of the major concerns in pharmaceutical industry since almost one century ago. various materials have been found to have such an effect but there are still many unknown substances that have not been discovered. objective: to introduce a novel mineral-based sun lotion with considerable uv absorption properties compared to commercially available ...
Technology Summary: Composite Electrode Material for Electrochemical Synthesis of Dimethyl Carbonate
1. Production of polycarbonate Polycarbonate (PC) is an amorphous, thermoplastic and transparent plastic. Current annual production of polycarbonates amounts to two million tons worldwide and expected to increase about 5-10% annually (Ref [1],[2]). At present, PC is made mainly by a phosgene-based technique. Phosgene is highly toxic and considered a serious pollutant. DMC can provide an environ...
Among the disadvantages of catheter mounts in common use is that, as generally manufactured, they have sharp interior angles militating against laminar flow. The diagram illustrates the longitudinal section of a plastic variant in which the narrowing has been chamfered off. It has been found satisfactory in practice, and seems to be standing up robustly to use. It has the additional advantage o...
THE figure shows a transparent plastic disk shaped to the curvature of the cornea, 7 mm. in diameter with four flanges notched on either side about 1f mm. from their end, for the retention of sutures passed through the superficial half of the cornea. This disk affords reasonably secure fixation for a corneal graft and at the same time its transparency allows inspection of its edges at the opera...
Micro-perforated absorber is a newly developed sound absorber, and it has a number of attractive features: • Unlike conventional perforated absorbers, micro-perforated absorber can be made from transparent materials like plastic glass. • Unlike commonly used fibrous absorptive materials, micro-perforated absorber is fibrous-free and thus, there is no health concern. • Micro-perforated membranes...
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