Esitage: a) e ajakirja otsivahend: Panin A-to-Z : Tallinna Tehnikaülikoolile avatud e-ajakirjad ja e-raamatud otsingusse ajakirja nime, leidsin Journal of Cellular Biochemistry. b) otsistrateegia: Panin otsingusse artikli nime (võtsin ,,D" ära) ning valisin tulemuste (15) seast ,,Vitamin D and multiple sclerosis" c) artikli autorid: Anita Raghuwanshi, Sneha S. Joshi and Sylvia Christakos 3. (3 P) Leidke TTÜ raamatukogu eraamatust Handbook of Chemistry and Physics polümeeri polycarbonate dielektriline konstant (dielectric constant). Esitage: a) otsivõimalus: Leidsin Handbook of Chemistry and Physics, panin otsinguvälja polycarbonate ja valisin sealt Dielectric Constant of Selected Polymers b) polümeeri polycarbonate dielektriline konstant sagedusel 1 kHz: 2.92 4. (3 P) Leidke andmebaasist SciFinder Scholar aine all transRetinol Esitage: a) otsivõimalus: Kasutasin otsingut EXPLORE SUBSTANCES ning panin otsingusse aine nime b) aine valem: C20 H30 O c) CAS RN: 68-26-8
A CD disk contains a long string of pits written helically on the disk. The edges of the pits correspond to bina "1"s. Iga pit on umbes 0.5 mikron Each pit is approximately 0.5 microns wide and 0.83 microns to 3.56 microns lon (Remember that the wavelength of green light is approximately 0.5 micron) Each track is separated from the next track by 1.6 microns. The area between the pits is termed "land". So, a highly magnified section of track might look something like: Pits are formed in the polycarbonate disk by an injection molding process. As such, they represent some of the smallest mechanically fabricated objects made by humans. The width of a CD pit is approximately the wavelength of green light. The tracks are separated by approximately three times the wavelength of green ligh Diffraction from these features (so very close to the wavelength of light) is what gives CD disks their beautifu colors. A thin layer (50-100 nm) of metal (aluminum, gold or silver) covers the pits
very narrow holes. Pull a piece off the roll and repair area with clean water and allow to dry is used, as body components can be made of trim it to the approximate size and shape fully. required, then pull off the backing paper (if The repair area is now ready for final a variety of different types (eg polycarbonate, used) and stick the tape over the hole; it can spraying. Paint spraying must be carried out ABS, polypropylene). be overlapped if the thickness of one piece is in a warm, dry, windless and dust free Damage of a less serious nature (abrasions, insufficient. Burnish down the edges of the atmosphere. This condition can be created minor cracks etc) can be repaired by the DIY
annaabi.ee 
