antiseptikuna Tööstuses katalüsaatorina orgaanilises sünteesis Fotograafias Keedusoola lisandina Leidumine Kõige rohkem Tsiilis Looduses saadakse joodi naftapuuraukude veest ja merevetikatest Jood esineb looduses peamiselt ühenditena Jood ja organism Jood on kilpnäärme hormooni koostisosa. Joodi puudus põhjustab: Struumat Raseduse katkemist Väärarengut Kasutatud materjalid http://et.wikipedia.org/wiki/Jood http://en.wikipedia.org/wiki/Iodine www.annaabi.com/ H.KARIK ,,Üldine keemia" 2 raamatut, mille nime ei mäleta TÄNAN KUULAMAST!
Samm sammult Meetod 8031 1. Vajuta 2. Täida küvett 10ml 3. Lisa proovile üks 4. Vajuta taimeri Hach prooviga. DPD Total Chlorine ikoonile. Programs. pulbri padjake. Sulge Vajuta OK. Vali programm kork ja Algab 240 Iodine. pööra ümber kolmeminutiline Vajuta Start. segunemiseks (see on reaktsiooniaeg. ettevalmistatud proov).Ilmub roosa värv, kui leidub proovis joodi.
4 · Jood sublimeerub kuumutamisel violetse auruna. · Joodi lahust alkoholis kasutatakse tärklise kindlaksmääramiseks, seejuures moodustub sinise värvusega ühend. Kasutatud kirjandus: http://web.zone.ee/chemistry/I.htm http://et.wikipedia.org/wiki/Jood http://protonizer.eu-youth.net/index.php? option=articles&task=viewarticle&artid=40&Itemid=3 http://en.wikipedia.org/wiki/Iodine http://www.eki.ee/dict http://osh.sm.ee/topics/ohutuskaardid/icsc/EST0167.HTM 5
three months and several further deaths later. Acute radiation syndrome was originally diagnosed in 237 people on-site and involved with the clean-up. Of these, 28 people died as a result of it within a few weeks of the accident. Nobody off-site suffered from acute radiation effects although a large proportion of childhood thyroid cancers diagnosed since the accident is likely to be due to intake of radioactive iodine fallout. Furthermore, large areas of Belarus, Ukraine, Russia and beyond were affected. The Chernobyl site and plant The Chernobyl Power Complex in Ukraine consisted of four nuclear reactors. Two reactors were under construction at the time of the accident. An artificial lake was constructed to provide cooling water for the reactors. The 1986 Chernobyl accident On 25 April the reactor crew at Chernobyl 4 began preparing for a test to determine how
· Joodi lahust alkoholis kasutatakse tärklise kindlaks määramiseks, seejuures moodustub sinise värvusega ühend. 10 Kasutatud kirjandus H.Karik ,,Üldine keemia. Käsiraamat õpilasele", Tln. Valgus 1981 lk.114. ENE, Tln. 1971 lk. 274 http://et.wikipedia.org/wiki/Jood http://protonizer.eu-youth.net/index.php? option=articles&task=viewarticle&artid=40&Itemid=3 http://en.wikipedia.org/wiki/Iodine http://osh.sm.ee/topics/ohutuskaardid/icsc/EST0167.HTM www.sool.ee/?id=1181 11
Eelista eri juhendeid/ ohutuskaarte. (15) Eestis ei ole määratud joodiga töötamisel piirnormi, keemilise aine keskmist sisaldust sissehingatavas õhus tööpäeva või töönädala jooksul, kuid lühiajaline piirnorm (15min) on 0,1ppm (1mg/m3). (8) ACGIH Threshold Limit Value (TLV): · 0.01 ppm (TWA) · 01 ppm (STEL) (16) 12 Kasutatud kirjands 1. http://et.wikipedia.org/wiki/Jood 2. http://en.wikipedia.org/wiki/Iodine#Structure 3. http://www.chemicalelements.com/elements/i.html 4. http://protonizer.eu-youth.net/index.php? option=articles&task=viewarticle&artid=40&Itemid=3 5. http://www.kristiine.tln.edu.ee/doku/keemia/Halogeenid.pdf 6. http://www.inchem.org/documents/pims/pharm/iodine.htm#PartTitle:1.%20NAME 7. http://osh.sm.ee/topics/ohutuskaardid/icsc/EST0167.HTM 8. http://www.riigiteataja.ee/ert/act.jsp?id=73153 9. http://www.atsdr.cdc.gov/toxprofiles/tp158-c4.pdf 10
experiments to obtain photographic images, but these photos weren’t permanent because after exposing them to light the paper turned black. The first camera that was small enough to be portable was designed by Johann Zahn in 1685.The first cameras were similar to the Zahn model, but with improvements in focus since before each exposure a sensitized plaque was inserted. In 1839 was published the popular daguerreotype by Louis Daguerre’s which used silver-plated copper plates sensitized with iodine vapors The invention of the wet collodion wet plate process invented by Frederick Scott Archer in 1850 greatly reduced the exposure time but But it always required the photographer to craft the plates either in dark rooms of photographic studios or in portable laboratories. 6 How did it work? (HIGUERA) The scene was captured with a camera obscura focused onto a 16.2 cm × 20.2 cm (6.4 in × 8.0 in) pewter plate thinly coated with Bitumen of Judea, a naturally
Nende bioloogiline aktiivsus tuleneb nii lähteühendi kui ka inimese seedekulglas esineva bakteriaalse mürosinaasi (tioglükosidaasi) toimel nendest tekkivatest isotiotsüanaadist e. sinepiõlist, nitriilist, oksasolidiintioonist (OZT) ning tiotsüanaadist. Mürosinaas hävib keetmisel. · Mürgisus. Kuigi inimese kohta andmed puuduvad, inhibeerib tiotsüanaatioon (CNS-) loomadel joodi omastamist kilpnäärme poolt, mille tulemusena tekivad jood-pöörduv (iodine-reversible) hüperplaasia, kilpnäärme hüpertroofia (nn. kapsa ja kaunviljade struuma) ning kasvupidurdus. OZT, inhibeerides joodi liitumist vastavate lähteühenditega, inhibeerib ka türoksiini sünteesi. · Isotiotsüanaadid omavad embrüotsidaalset toimet ning põhjustavad loote kaalu alanemist. Isotiotsüanaadid ja mõningad glükosinolaadid (näit. sinigriin), mitte aga tiotsüanaadid, on mutageensed Amesi testis. oksalaadid
Nende bioloogiline aktiivsus tuleneb nii lähteühendi kui ka inimese seedekulglas esineva bakteriaalse mürosinaasi (tioglükosidaasi) toimel nendest tekkivatest isotiotsüanaadist e. sinepiõlist, nitriilist, oksasolidiintioonist (OZT) ning tiotsüanaadist. Mürosinaas hävib keetmisel. Kuigi inimese kohta andmed puuduvad, inhibeerib tiotsüanaatioon (CNS-) loomadel joodi omastamist kilpnäärme poolt, mille tulemusena tekivad jood-pöörduv (iodine-reversible) hüperplaasia, kilpnäärme hüpertroofia (nn. kapsa ja kaunviljade struuma) ning kasvupidurdus. OZT, inhibeerides joodi liitumist vastavate lähteühenditega, inhibeerib ka türoksiini sünteesi. Tulemuseks on rottidel joodi manustamisega mittepööratav nn. brassica seed struuma. Lisaks struumale (inglise k. goiter või goitre) põhjustavad progoitriin ja epigoitriin oma nitriilmetaboliitide kaudu ka maksa ja neeru laienemist ning surma
other garments. They had only to be dipped in water to create the writing fluid. These miracles of the test tube, called F and P inks by the I British chemists who taught the Americans much of what they knew, were so precisely formulated that they would react with only one other chemical to form a visible compound. Eventually, the Allied chemists discovered a reagent that brought out secret writing in any kind of ink, even clear water. Crystals of iodine, heated gently, sublimated into fumes of a beautiful violet hue that settled more densely in those fibers of paper that had been disturbed by any kind of wetting action, thus tracing the pen's course. The Germans replied by writing in a sympathetic ink and then moistening the entire sheet. The Allies struck back with a chemical streak test that would show whether the paper surface had been dampened. This was almost as incriminating as actual development of a secret-ink letter, for who but a
proportion of lipid associated with muscle. that link muscles to bones. The muscle is Triglycerides (triacylglycerides) consist of a subdivided into bundles or groupings of glycerol molecule in which the hydroxyl muscle cells. These bundles (also known as groups are esterified with three fatty acids. fasciculi) are surrounded by another sheath The melting point and the iodine number of of connective tissue, the perimysium. A thin lipid that is associated with the muscle is layer of connective tissue, the endomysium, determined by the chain length and the degree surrounds the muscle cells themselves. The of saturation of the fatty acids. Phospholipids endomysium lies above the muscle cell mem- (phosphoglycerides) are another type of brane (sarcolemma) and consists of a base-
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