septembri kohta. Mõne aja pärast helistati Ray Torole ja kutsuti ta bändi, kuna sel ajal ei suutnud Gerard laulda ja samal ajal kitarri mängida. Bändi esimesed lindistused tehti Matti pööningul, kus laulud "Our Lady of Sorrows" (sel hetkel nime all "Bring More Knives") ja "Cubicles" linti võeti. Mikey Way'le, Gerardi nooremale vennale, meeldisid demod nii palju, et ta otsustas bändiga liituda. Bändi nime võttis Mikey Way Irvine Welshi raamatust "Ecstasy: Three Tales of Chemical Romance". My Chemical Romance allkirjastas lepingu Eyeball Recordsiga ja mängis samas ruumis, kus Pencey Prep ja Thursday. Seal tutvus bänd Pencey Prepi peavokalisti ja kitarristi Frank Ieroga. Pärast Pencey Prepi lahkuminemist 2001 ja 2002 vahel, liitus Frank kitarristina My Chemical Romance'iga, ainult mõned päevad enne bändi debüütalbumi lindistamist. Kolm kuud pärast bändi formeerumist lindistasid nad oma debüütalbumi "I Brought You My
NEON Symbol: Ne Atomic number: 10 Date of Discovery: 1898 Discoverer: Sir William Ramsay Name Origin: Form the Greek word neos (new) Uses: lighting Obtained From: liquid air Respected teacher, classmates today I am going to speak about a chemical element neon. it will take me about 2-3 minutes. I am going to talk about Neon's history extraction physical properties chemical properties uses health effect Neon is the chemical element that has the symbol Ne and atomic number 10. Neon was discovered in 1898 by British chemists William Ramsay (1852-1916) and Morris Travers (1872-1961). It occurs naturally in the atmosphere, but only in very small amounts. Extraction Neon can be obtained from air by fractional distillation(murdosaline destilatsioon). The first step in fractional distillation of air is to change a container of air to a liquid. The liquid air is then allowed to warm up
18.09.2012 Mari-Liis Eha 120876KAKB My interest in chemical engineering I studied for 3 years in an english-science biased class in secondary school. My favourite subjects were chemistry and biology. We had many field trips. For instance, we had field trip to Kohtla-Järve to see the oil shale industry and also tours to see the wind generators. This is where my attraction to environment and chemistry grew together and I wanted to know more about further job and education opportunities in this field.
UDK 504 583 1054ewew331233 b) Roots, O. - Püsivad orgaanilised saasteained meie keskkonnas. Tallinn. Keskkonnaministeeriumi Info- ja Tehnokeskus 1.2. Rahvusvaheline kümnendliigitus – UDK a) genoomid – 575.113 b) spektrofotomeetria - 544.23 c) orgaaniline süntees ´- 547.057 (043) d) komposiitmaterjalid - 620.22-419.8 (075.8) 1.3. E-ajakirja otsing e- väljaannete otsivahendiga A - to - Z Ajakiri: Chemical engineering journal Andmebaas: ScienceDirect Freedom Collection Elektrooniliselt kättesaadav alates 1998 köiteid 70 Ajakiri: The chemical engineering journal and the biochemical engineering journal Andmebaas: ScienceDirect Freedom Collection Elektrooniliselt kättesaadav 1993-1997 köiteid 65 1.4. Artikli otsing eesti artiklite andmebaasist ISE Kui teen täpsustatud otsinguga otsingut, siis leitakse 5 eestikeelset artiklit, kuigi neist
Durability of concrete In this presentation I'm focusing on the durability of concrete. First I'll give a brief overview of concrete, we have to know what does it actually means and where is it used? (slide) Basically concrete is a construction material composed of cement, aggregate (generally gravel, limestone, or granite, plus a fine aggregate such as sand) also water, and chemical admixtures.(slide) Concrete is used to make pavements, architectural structures, foundations, roads, bridges, marine- and parking structures, brick/block walls and footings for gates, fences and so forth. Mainly it is used because of its high durability and availability, but also because it is cheaper than to use wood for example. Concrete is used more than any other man-made material in the world.(slide)
TTÜ Tartu kolledz Durability of concrete Tauri Must Tartu 2009 Main Content Cement Aggregate Sand Water Chemical admixtures Field of application Concrete is used in... · Pavements · architectural structures · Foundations · roads · Bridges · marine- and parking structures · brick/block walls · footings for gates fences Three Georges Dam · The world largest concrete construction · China, river of Yangzte, 2006 · 2,335m long, 101m high Possible threats Physical Chemical · Frost · Sulftates, · Wind · Sea water, · Waves · Acids,
Ilona Juhanson, 123964YASB 2.1 a) panin otsingusse Cobalt ja märksõnaks boiling, chemical structure OR properties b) sulamistemperatuur tm/1495⁰C c) keemistemperatuur tb/2927⁰C 2.2 a) Advanced search: Search in – text and key words; and in – subject : environment AND global AND changes AND europe (43296 tulemust) -> b) muutsin profiili natuke laiemaks, kuna muul juhul Climatic Changes lisamine tulemusi ei andnud: c) http://site.ebrary.com/lib/ttul/docDetail.action? docID=10159425&p00=environment%20changes%20europe d) Wright, H. E., Jr. Kutzbach, John E
WHAT IS A ROCKBAR? • Glass fiiber+ plastic • Composite reinforcement COMPARISON COMPOSITE REINFORCEMENT STEEL REINFORCEMENT ROCKBAR 2 • Density 1000 (g/cm3) High • Tensile 0,56 7,8 strenght 550 (MPa) Low • Corrosion- & chemical 17 resistance • Thermal conductivity W(mC) FIELDS OF APPLICATION • Concrete walls, beams, pillars • Elements of chemical manufacturing facilities • Underground roadways THANK YOU FOR LISTENING! QUESTIONS?
Pelgulinna Gümnasium We school Canteen There is good food. Computer classes Computer class we learn about computers Chemistry class Chemistry class There are studied the chemical elements We do chemistry experiments in class Chemistry is a class a two chemical elements in the table Library The library can borrow books There you can also read news Art class School stadium We school stadion Our school physical education classes at the stadium Small posters They are in the library
(biosynthesis) and (dietary Liitotsing, sõna 41 supplements) Viitekirje: Ameta, K. L., Dandia, A. (2014). Green chemistry : synthesis of bioactive heterocycles. New Delhi : Springer India. 2. Kirjuta iga dokumendi nimetuse järgi, kas tegu on alg- või vahendusinfoallikaga. Artikkel ajakirjas Journal of the American Chemical Society teemal "Total synthesis of a natural product" - algallikas, kuna artiklis tuuakse välja uusi ideid ning mõtestatakse ümber vanu. Atkins. Physical Chemistry. – vahendusinfoallikas, kuna tegu on õpikuga, kuhu on kokku kogutud erinevatest allikatest pärit informatsiooni, et seda õppuritele kompaktsemalt kättesaadavamaks ning mõistetavamaks muuta.
The water is than disinfected, usually by means of chlorination. Removal of dissolved solids Microrganisms are not only a threat to water; they can also be an advantage when it comes to water purification processes. They can convert harmful contaminants to harmless substances. This biological purification process usually takes a long time and it is only used for water that is polluted with contaminants that the microrganisms, usually bacteria, can convert. Physical/ chemical techniques When treatment by microrganisms is not an option we often use different treatment techniques, called physical/ chemical treatment techniques. Chemical treatment often deals with the addition of certain chemicals, in order to make sure that the contaminants change structure and can then be removed more easily. Removal of contaminants can also be done through more difficult specific chemical processes. It takes a lot of education to fully understand these purification steps
9 October 2012 SODIUM THIOPENTAL VERB DEFINITION TRANSLATION Barbiturate Drugs that act as depressants Sedatiivse toimega uinuti Anesthetic Drug that causes reversible loss of tuimesti sensation Intravenous Within a vein Veenisisene (IV) To redistribute Chemical reaction involving ligand Ümberjaotus exchange To dissolve To pass into solution Lahustuma Lipid soluble Insoluble in water Rasvlahustuv Compound Combinations of two or more Ühend elements To induce Stimulate the occurrence of Ajendama To induct Bringabout/cause Esile kutsuma Tissue Ensemble of similar cells Kude
2.creating universal panacea, remedy what would cure all diseases and prolong life indefinetely. – philospher´s stone was the key in these goals 3. creating human life 3) Idea of making gold and silver. Where does it originate and / how to Western Europe? The idea of transmutation arose among the Alexandrian Greeks in the early centuries of the Christian era, then it passed to Arabs and then from Arabs to Western Europe. Since then realization was very important to all chemical workers down to the time of Paracelus and even later. 4)narrow and wider meaning of alchemy Narrow sense of the word, alchemy is pretended art of making gold and silver, or transmuting the base metals into the noble ones. Wider meaning that it stands forthe chemistry of middle ages. 5)why is the philosophical principle important in alchemy? Philosophical principle unified and focused chemical effort, which previously was expanded on acquiring empreical acquaintance
seeds to a depth from which seedlings of most weeds are unlikely to emerge (5cm or deeper) • Crop rotation – many annual weeds are strongly associated with specific crops Prevention of resistance Herbicidal control methods • Alternative herbicides – likely to have effect on resistant populations • Mixtures and sequences – use two or more herbicides which have different modes of actions • Herbicide rotations – rotation of herbicides from different chemical groups should reduce selection for resistance Herbicide – tolerant crops • Next revolutionary breakthrough in weed control • Has its upsides and downsides Herbicide-tolerant crops Advantages • Improved yield through good weed control • Improved quality through removal of weeds • Improved unit cost of production • The possibility to use low-tilage systems Herbicide-tolerant crops Disadvantages • Danger of cross-pollination
Abstract Teema pealkiri Nimi Eriala Instituut Asukoht, Aasta The Bhopal gas tragedy is considered to be the world's worst industrial disaster. Over 40 tonnes of the deadly methyl isocyanate (MIC) leaked from the Union Carbide Corporation Plant, toxifying and killing thousands of people. This study was aimed at determining the causes of this disaster and also the effect it had on people and the environment. A thorough analysis was done on several scientific works and articles. A lengthy documentary was also included in the analysis. The analyses established that a metal plate was missing from between two pipes in the Union Carbide Corporation in which water managed to reach the MIC tank. The chemical reaction between water and MIC caused a major temperature and pressure rise in the tank which allowed the toxic gas to escape from the emergency pipes. The gas was not neutralized, as the three fundamental emergency systems failed to work....
f) 216 articles found for: ALL(Semiconductors in solar cells) AND LIMIT-TO(cids, "271603","Thin Solid Films") AND LIMIT-TO(yearnav, "2012") 2.4. Otsing andmebaasist EBSCOhostWeb. 2.4 a) Märksõnad: chemicals (TX all text) AND environment (TX all text), plants (TX all text), dangerous (TX all text). Otsingu täpsustamised: full text, scholarly(peer reviewed) journals;. b) Lenfeld, P., Buttridge, I. (2013). Plant Revamps and Turnarounds: Some Lessons Learned. - Chemical Engineering, 120, (12), 45-50. [Online] Academic Search Complete (01.03.2014)
near the kidney. It produces and secretes noradrenaline and adrenaline for the activation of the sympathetic nervous system. It is implicated in stress response. AFFERENT – Carrying information towards a particular group of neurones (compare efferent*). AGONIST – A neurotransmitter or a drug which binds to a receptor and triggers a cascade of intracellular signalling leading to changes in the membrane potential. AMINO ACID – A chemical made of carbon, oxygen, hydrogen and nitrogen, which is a building unit of all proteins* and other biologically important substances. AMINO ACID NEUROTRANSMITTERS – A group of fast acting neurotransmitters* which includes glutamate (excitatory) and GABA (gamma-amino butyric acid, inhibitory). AMNESIA – Loss of memory. AMYGDALA – A structure in the forebrain which is a component of the limbic* system. It is implicated in control of emotions.
c) Panda, Siva S.; Khanna, Pankaj; Khanna, Leena. 29 viidet. d) Panin linnukese ajakirja nime ette ning valisin View Records. 3. Otsing referaatandmebaasis Scopus. a) ((bioreactors) and (wastewater) and (treatment)) and doctype (ar) b) Liu, H., Logan, B.E. Electricity generation using an air-cathode single chamber microbial fuel cell in the presence and absence of a proton exchange membrane. 993 viidet. c) Sort on: Cited by d) Artikli täistekst on saadaval American Chemical Society Journals kaudu. 4. Võrdlev viiteanalüüs minu teemal kirjutava tunnustatud autori kota andmebaasides Web of Science ja Scopus. a) Albert Demonceau b) Artiklite koguarv - Web of Science: 71 Scopus: 116 c) Viidete koguarv - Web of Science: Scopus: 2283 d) h-indeks: 39 e) Dragutan, V., Dragutan, I., Delaude, L., Demonceau, A. (2007). NHC-Ru complexes- Friendly catalytic tools for manifold chemical transformations
Insist on client drawings the design risk!!! design assistance required Advise that inspections do NOT infer responsibility ABS Material Properties Modulus Temperature Hoop stress Variation Ring Bending Strain Design Life Creep Toxicity & Taint Stiffness Abrasion Resistance Chemical Resistance Ultraviolet Resistance Modulus Published as Strain rate & loading 2200MPa at 20ºC changes modulus (instantaneous) values Resin properties Value determined change modulus values by ASTM test Modulus affects Standard dog wavespeed in surge bone test events
HAAB12 Euroopa Liidu direktiivid Tööandja kohustused Directive 89/391 - OSH "Framework Directive" Vabariigi Valitsuse määrus; Official Journal: Elektrooniline Riigi Teataja, Publication date: 29/12/2003; Reference: (MNE(2003)55377) The employer shall: evaluate all the risks to the safety and health of workers, inter alia in the choice of work equipment, the chemical substances or preparations used, and the fitting-out of work places implement measures which assure an improvement in the level of protection afforded to workers and are integrated into all the activities of the undertaking and/or establishment at all hierarchical levels take into consideration the worker's capabilities as regards health and safety when he entrusts tasks to workers; consult workers on introduction of new technologies;
convenient height, and the lower edge tied tightly against the trunk. Mechanical Methods Wire Screens inverted funnels made of wire screening or tin may be tacked about the tree trunk. Sticky Bands the most effective barriers that can be used. Chemical Methods The Stomachpoison Sprays Poison is taken into the stomach of insects with their food. The Contact Sprays chemicals which have a caustic or clogging effect on the insects. Spraying Forest Trees various chemical insect poisons are sprayed by special pumps. Airplane Dusting problably the most effective method for treating defoliators. Click to edit Master text styles Second level Thank you for listening Third level Fourth level Fifth level Source: "Forest Insects" by R.W. Doane, E.C Van Dyke, W.J Chamberlin and H.E.
D i ox i n s a n d f u r a n s i n t h e atmosphere. Their impact on humans and nature. Emission sources What are dioxines and furans? The term Dioxin is commonly used to refer to a family of toxic chemicals that all share a similar chemical structure and a common mechanism of toxic action. Most dioxins and furans are not manmade or produced intentionally, but are created when other chemicals or products are made. This family includes: seven of the polychlorinated dibenzo dioxins (PCDDs), ten of the polychlorinated dibenzo furans (PCDFs) and twelve of the polychlorinated biphenyls (PCBs). · PCDD · 2,3,7,8TCDD · PCDF · PCB · PCDDs and PCDFs are not commercial chemical products
Pärnumaa Kutsehariduskeskus Vamm,Seened Referaat Juhendaja: Koostaja:Ago Võhma Rühm:E-08B 12.05.2009 Maja vamm Majavamm koosneb värvitutest, mikroskoopiliselt väikestest niidikestest. Need kasvavad otstest ja ühinedes on nad juba palja silmaga nähtavad. Kasvav seenekeha on valge vati sarnane. Aja jooksul tekib sellele kile või koorikutaoline kate ning moodustuvad viljakehad, mis eritavad pruuni pulbritaolist Kliki pilt suuremaks eosetolmu. Niidistik tiheneb 3 5 mm jämedusteks, mõnikord ka jämedamateks nöörideks. Eosed levivad tuule ja putukate abil või satuvad hoone konstruktsioonidesse koos uue puiduga. Eosed on idanemisvõimelised 5 6 aastat. Majavammi kasv...
tööprotsessidele ja korraldama rangemat kontrolli. Vaadates ajaloos olulisel kohal olevaid õnnetusi, on näha, et seadmete hooldus on läbivaks märksõnaks põhjustes. Vead hooldustööde teostamises on põhjustatud töötajate lohakusest või teadmatusest. Järelikult on, kuhu edasi areneda, et tulevikus sarnaseid intsidente ei korduks. 7 Kasutatud kirjandus · Disasters: Chemical Accidents and Spills. [WWW] http://www.pollutionissues.com/Co- Ea/Disasters-Chemical-Accidents-and- Spills.html (15.11.2010) 2. The explosive effect of accidents in the chemical industry.Chain reaction [WWW] http://www.icis.com/Articles/2010/03/29/9345517/the-explosive-effect-of-accidents-in- the-chemical-industry.html (15.11.2010) 3. The Feyzin disaster. [WWW] http://en.wikipedia.org/wiki/Feyzin_disaster (15.11.2010) 4. O'Reilly, J.T. (1987)
PG (steroid)/Candida antarctica lipaasi B aktiivtsentri interaktsioonide mudeli loomine (steeriliste ja mittesteeriliste interaktsioonide energeetilise pingerea või kaardi loomine), mis võiks pakkuda laiemat huvi sarnaste probleemide lahendamisel; uued lipaaskatalüütilised ja kemoensümaatilised sünteesimeetodid. 2. Üldised märksõnad eesti ja inglise keeles biokatalüütiline- biocatalytic stereokeemiline - stereochemical süntees - synthesis keemilised reaktsioonid - chemical reactions keemiline süntees - chemical synthesis 3.Teemaspetsiifilised märksõnad eesti ja inglise keeles stereoselektiivne - stereoselective kemoensümaatiline - chemoensymatic kemoselektiivne - chemoselective regioselektiivne - regioselective detsükliseerimine - decyclization lipaaskatalüütiline - lipase-catalytic steroidid - steroids prostanoidid - prostanoids farmakoloogiline - farmacologic asümmeetriline alküleerimine - asymmetrical alkylation 4
2. The measures referred to in paragraph 1 shall be such that each worker shall be entitled to, or shall undergo, health surveillance before being assigned to duties related to the activities referred to in Article 2 and subsequently at regular intervals. 3 Council Directive Article 4 98/24/EC Determination and assessment of risk of hazardous chemical agents 1. In carrying out the obligations laid down in Articles 6(3) and 9(1) of Chemical agents Directive 89/391/EEC, the employer shall first determine whether any hazardous chemical agents are present at the workplace. If so, he shall then assess any risk to the safety and health of workers arising from the presence of those chemical agents, taking into consideration the following:
livestock, pesticides, and animal manure are to be maintained. The farmers, who follow these set rules help to provide an affordable, safe, and healthy produce to all alike. ✔ Another advantage is that large productivity of food is possible with less amount of land. This leads to economies of scale and directly contributes towards meeting the ever-growing demand for food supplies. Disadvantages ✘ Intensive farming involves the use of various kinds of chemical fertilizers, pesticides, and insecticides. Apart from this, it is also associated with farms that keep livestock above their holding capacity, which in turn leads to pollution, various diseases, and infections brought about by overcrowding and poor hygiene. ✘ Reports and studies reveal that intensive farming affects and alters the environment in multiple ways. Forests are destroyed to create large open fields, and this could lead to soil erosion. It affects
troubled our ancestors. Few hundred years ago the average european was still worrying about his livestock being looted. But we feel that a Powerpoint presentation that is due tomorrow is something that threatens our existance. Stress can cause some people unnecessary anxiety that paralyzes them and is an impediment to action. That is the opposite of the motivational stress that forces us to act. Stress causes changes in the organism´s chemical composition. So does puberty. The result of that is a anxious teenager, who thinks that his or her life will certainly come to an end if his or her shoes don´t resemble the footwear of his or her adolescent companions. Another great stressor for young people is school. There are countless reasons why. They have to fit in to their “pack “ and at the same time learn new imporant and lessimportant information and skills. It also reminds them that life is usually hard and tedious.
Iseseisev töö nr.2 Tööinspektsiooni kodulehelt : http://www.ti.ee/index.php?page=809& Kemikaali seadus Mis on ohtlik kemikaal? Ohtlik on kemikaal, mis oma omaduste tõttu võib kahjustada tervist, keskkonda või vara. Mille alusel kemikaale identifitseeritakse? Kemikaal identifitseeritakse aine või valmistise nimetuse ja Euroopa kaubanduslike keemiliste ainete loetelu (European Inventory of Existing Commercial Chemical Substances, edaspidi EINECS), Euroopa uute keemiliste ainete loetelu (European List of Notified Chemical Substances, edaspidi ELINCS) või Chemical Abstracts Service'i (edaspidi CAS) numbriga. Mis on ohtlik ettevõte ja suurõnnetuse ohuga ettevõte? Ohtlik on ettevõte, kus kemikaale käideldakse ohtlikkuse alammäärast suuremas koguses, suurõnnetuse ohuga on ettevõte, kus ohtlikke kemikaale käideldakse künniskogusest suuremas koguses. Mida sätestab kutsehaiguse loetelu?
hemicellulose. Due to the high carbon and hydrogen content, the lignin has higher calorific value than cellulose and hemicellulose. In smaller quantities the wood contains also tar, resins and phenols that can cause fouling of heat transfer surfaces and stack interior with the deposits that are difficult to remove From the point of view of combustion technology and practical use of fuels the following properties of fuels are of most interest: chemical composition, moisture, density, fly and bottom ash content, ash melting characteristics and content of impurities (soil, dust, etc.) in the fuel. Chemical composition of wood % in dry matter Element Wood Bark C 4850 5166 H 6,06,5 5,98,4 O 3842 24,340,2 N 0,52.3 0,30,8 S 0,05 0,05
e) C12M23/14A C – Chemistry, Metallurgy C12 – biochemistry, beer, spirits, wine, vinegar, microbiology, enzymology, mutation or genetic engineering C12M – apparatus for enzymology or microbiology; apparatus for culturing microorganisms for producing biomass, for growing cells or for obtaining fermentation or metabolic products, i.e. bioreactors or fermenters C12M23/00 - Constructional details, e.g. recesses, hinges (flow directing inserts in C12M27/18-C12M27/24; apparatus for chemical or physical processes in general B01J, chemical or physical laboratory apparatus in general B01L) C12M23/02 - Form or structure of the vessel (large containers B65D88/00) C12M23/14 – Bags 8.3.2. Leia patendid elektroonilise programmiga zig-zag õmblusmasinate kohta. b) Programme-controlled sewing machines c) D05B 19/00 e) 25 f) „Zig-zag sewing machines“ 8.3.4. Kasutades märksõna ja klassifikatsiooniotsingut, leia oma kursusetöö teemal patente
• Services • Finance • Tourism • Media • Education Mining • Queensland, New South Wales and Victoria • world's leading coal exporter • the second largest diamond mine in the World Agriculture • major agricultural producer and exporter • There are three main zones • Wide variety of fruits, vegetables and nuts • The beef industry Manufacturing • peaked in the 1960s • In 2004–05, the manufacturing industry exported • Motor vehicles • Chemical industries Conclusion Australia has alot of large industries that bring in money for the people, especially mining and agriculture. Sources • http://en.wikipedia.org/wiki/Economy_of_Australia • http://en.wikipedia.org/wiki/Agriculture_in_Australia • http://en.wikipedia.org/wiki/Manufacturing_in_Australia THANK YOU FOR WATCHING!
PESUVALGENDI (NaClO) CAS number: 7681-52-9 Nimetus: Naatriumhüpokloriid Valem: NaClO, molaarmassiga 74.442 g/mol Teised nimetused: Antiformin, Modifitseeritud Dakini lahus, Surgical chlorinated soda solution, Carrel-Dakin'i lahus Omadused: Rohekas kollane tahke aine, magusja lõhnaga. Sulab 18 kraadi ja keeb 101 kraadi juures Celsiuse järgi. Vees lahustuvus on 29.3g/100ml. Toimib pesuvalgendina, plekieemaldina. Tüüpiliselt on kodukasutuses pesuvalgendina lahus 3-8% naatriumhüpokloriidi sisaldusega. Veepuhastina kasutatakse 12-15% sisaldusega lahust. Veel kasutatakse seda lõhna/plekieemalduseks, disinfektsiooniks. Keskkonda sattudes moodustab püsivaid kloororgaanilisi ühendeid. Satuvad nt. reoveepuhastitesse heitveena. Tugev oksüdeerija, võib kahjustada nahka või silmi. EL klassifikatsiooni järgi on ta KORROSIIVNE ja KUJUTAB OHTU KESKKONNALE http://www.ekyl.ee/public/2012/Anu/Kemikaalid1.pdf http://www...
connected to more active metal. Now put the copper wire into contact with the zinc and observe whether hydrogen will evolve on the copper surface. By putting copper and zinc into contact with each other in the solution of hydrochloric acid (an electrolyte), you have created a galvanic pair. Zinc as the metal with more negative potential will be the anode and copper, with more positive potential, the cathode. Which of the two metals will dissolve (corrode)? Write the chemical equations of the reactions occurring on the anode and the cathode! Reaction on anode: 2+ ¿ -¿ Zn¿ Zn 2 e ¿ Reactions on cathodes: -¿ H 2 +¿+2 e ¿ 2 H¿ -¿ 2 H 2 O +¿+ 4 e ¿ O2 + 4 H ¿ 1.2. Place a zinc granule in a test tube and pour ~3 cm 3 of CuSO4 solution on top of it. After a
Külma sõja põhjused : a)kahe vastandliku maailmavaate, demokraatia ja kommunismi vastasseis b)NSV Liidu eesmärk hõivata uusi territooriume Euroopas ja Aasias c)Marshalli plaani käivitamine USA poolt d)Berliini blokaad ja Saksamaa lõhenemine Milliste "relvadega" sõditi külma sõja ajal ? Üritati üksteist rohkem üle trumbata igal alal nt: majanduses ja relvastuses. Oli vastasseis kommunismi ja demokraatia pärast. Kõige rohkem vaenutsesid USA ja NSV Liit ja kartuses, teine võib igal hetkel rünnata hakkati tootma massihävitusrelvi, milleks olid ka ABC relvad (atomic , biological , chemical). Mõisted : Trumani doktriin -1947. USA presidendi seisukoht, kus toetatakse vabade rahvaste püüdeid sise- ja välissurve vastu. Marshalli plaan -1947. Nägi ette Euroopa taastamist USA abil. Berliini blokaad -1948. NSV Liit üritas blokeerida lääneliitlaste kontrolli all olevaid Berliini sektoreid. Saksamaa lõhenemine -1949. Lääne-Saksamaal moodus...
Ilona Juhanson, 123964YASB 1.1 Raamatu otsing e-kataloogist ESTER OTSIVÕIMALU OTSIPROFIIL RAAMATUTE ARV RAAMATUTE ARV S TTÜR TÜR Märksõna Põhjavesi 213 230 Märksõna Kantserogeen 109 40 Raamatuid UDK otsingus märksõnadega põhjavesi ja kantserogeen ei leidunud. UDK: põhjavesi Märksõna: põhjavesi (213 kirjet) Ilona Juhanson, 123964YASB Ja Tartus (230 kirjet): Ilona Juhanson, 123964YASB Märksõna: kantserogeen (109 kirjet): Ja Tartus (40 kirjet): Ilona Juhanson, 123964YASB UDK: kantserogeen Ilona Juhanson, 123964YASB b) Olulise raamatu bibliokirje: Chemical and isotopic groundwater hydrology (c. 2004, 3rd ed) / Mazor, Emanuel TLÜAR loodusteaduste saali kojulaenutusosakonnas (kohaviit: LO 556/M23) Kasutasin märksõna põhjavesi. 1.2 Märksõna ...
Thomas Alva Edison (1847–1931) American inventor and businessman electric bulb phonograph Moving pictures machi Childhood - born in Ohio in February of 1847 -self-taught -experimenting, built his own chemical laboratory -telegraph operator Over 1000 inventions The greatest invention are the phonograph in 1877 He also imroved the telephone system that had been invented by Be 1878 Edison worked to discover a way of improving the electric light bulb invented in England by Sir Joseph Swan Henry Ford - the first electric car.
Andro Andronov Talinn university of technology ● founded 1918 ● public university ● only university of technology in estonia ● biggest international community in Estonia ● modern facilities and labs facilities ● Campus area: 53 ha faculties and colleges 8 faculties: 5 Colleges: ● Civil engineering ● Kuressaare ● Chemical and Materials Technology ● Tartu ● Social Sciences ● Tallinn ● Information Technology ● Virumaa ● Mechanical Engineering ● Estonian Maritime Academy ● Power Engineering ● Faculty of Science ● Tallinn School of Economics and Business Administration what are the requirements to get in
was produced in Estonia, but presently the share of imported product has fallen to 14.5%. Such change has been fostered by production methods that have quickly become more modern and more varied. Several producers hope to soon enter the EU market with their production. Part 2 Light industry yields a highly varied output from cotton fabrics to clothing and footwear. The fastest production growth can be witnessed in the enterprises of mechanical engineering and metalwork and chemical industries which give more added value. A widespread preconception, especially in Russia, holds that the Estonian economy depends largely on Russian transit. The reality is different -- freight traffic between Russia and the rest of the world is an important source of profit for Estonian ports but the role of transit in the Estonian economy has been consistently decreasing. Slightly more than 70% of the freight flow of the ports and 57% of the rail freight is connected with transit. Such
DRUGS-your enemy! Drugs-What are they? · Banned by law · Really dangerous and unhealthy · People use them to get high or feel better · Affect our behavior and senses completely · There are natural and chemical drugs What is a drug addiction? · Constant need to have it again and again · Physical addiction · Mental addiction Main reasons to start · Your friends use it · Curiosity-new and interesting · Symbol of independents,rebellious and being an adult · The feeling of being high · Easy to get · Symbol of money and fame What is what? · Ecstasy · Methadone · Meth · Cocaine · Heroin · Crack
CATS - COMMUNICATION · Cat communication is the range of methods by which cats communicate with other cats, humans and other animals. · Communication methods include postures, movement, auditory and chemical signals. Meowing · A meow is a sound used by cats to signal a request to their mother or owner. When communicating with human beings, adult cats express variations of this tone to demand food or attention, register complaints, and convey bewilderment. An alteration in tone, pace, or punctuation changes the meaning, however slight. Purring · A purr is a sound made by most species of felids, but most
Entsüklopeediad: 1. (2 P) KIRK, R., OTHMER, D. ENCYCLOPEDIA OF CHEMICAL TECHNOLOGY a) Kohaviit: TE 66/K-48 Riiuli nr: 422 b) Artikkel teemal "Electrically conductive polymers" c) Köide: 9 lk: 61 d) Elektrijuhtivate polümeeride lühike definitsioon (võib olla inglise keeles) Elecrtically conductive polymers are composed of conjugated polymer chains with -electrons delocalized along the backbone. 2. (2 P) ENCYCLOPEDIA OF INORGANIC CHEMISTRY a) Kohaviit: TE 546/E-54 Riiuli nr: 303
removable from organism, especially blood veins. If blood is blocked then it may cause death. It is necessary to keep organism clean. Change your food ration for healthy and nutritious food like fruits, nuts, rice, vegetables etc. Also consume more dairy produtcs that have lot of carbohydrates and less fried meals. Boiled are prefered more. The second thing is activity. Pick up a sport which you like, the more action it has the better it is. While doing sports bad salts and chemical elements come out through sweat. After excercises drink much water, because body is dehydrated and eat some fruits with sources of energy or low fat food. You will regain lost energy and important elements. Following these easy steps you can stabilize and control food ration and enjoy while eating favourite dishes.
Firstly, unemployed people get new job. Secondly, country gets huge income from successful company. Next, if factories uses recyclable material, it would save earths resources and also slow down global warming. On the other hand, there are some throwbacks as well. Firstly, companies which do not have experience with factories might produce an enormous amount of air pollution. Secondly, sophisticated combinations need highly educated experts, otherwise failure might cause chemical fires, which may lead to catastrophic disasters. What is more, new factories tend to start with cheap products which are produced with toxic chemicals and usually end up polluting our groundwater. In conclusion, there are clearly both marvelous and terrible sides to building new factories. Personally, I believe that building new factories is marvelous because it has positive affect on economy and also gives1 job for unemployed people, however building new factories has negative
amounts of phosphorus and sulfur. As humus decomposes, its components are changed into forms usable by plants. Humus is classified into mor, mull, or moder formations according to the degree of its incorporation into the mineral soil, the types of organisms involved in its decomposition, and the vegetation from which it is derived. Humiinhape Keemiline valem Humiinhape Humic acid has the average chemical formula C187H186O89N9S1 and is insoluble in strong acid (pH = 1). One of two classes of natural acidic organic polymer that can be extracted from humus found in soil, sediment, or aquatic environments. The process by which humic acid forms in humus is not well understood, but the consensus is that it accumulates gradually as a residue from the metabolism of microorganisms. Transition and heavy metals--for example, Fe3+ or Pb2+--as well as other
asp (4.12.2013) Toe Nõmm. 2008. Keemiarelvane Eesti http://www.horisont.ee/node/743 (4.12.2013) Alex Williams. 2013. Children of the Apocalypse: Agent Orange still affects people in Vietnam. http://investvine.com/children-of-the-apocalypse-agent-orange-still-affects-people- in-vietnam/ (4.12.2013) Barry R. Schneider. 2012. Weapons of mass destruction. http://www.britannica.com/EBchecked/topic/108951/chemical-weapon/274179/Weapons-of- mass-destruction (4.12.2013) Martin Robbins. 2013. Are Chemical Weapons Actually Useful In A War? http://www.vice.com/read/are-chemical-weapons-actually-useful-in-war (5.12.2013) Department of Health. 2004. Facts About Nerve Agents. http://www.health.ny.gov/environmental/emergency/chemical_terrorism/nerve_agents_genera l.htm (5.12.2013) Enn Tosso. 2004. Pipragaas tõrjub ka narkojoobes kurjategija rünnaku. http://www.aripaev.ee/?PublicationId=31503ED6-39D4-4163-9D98- 74AA1E3959CE&code=100822 (5.12.2013) Jeanne Mager Stellman, Steven D
The Republic of Estonia is a country in Northern Europe. The territory of Estonia covers 45,227 km2 . Tallinn is the capital and largest city of Estonia.The city is an important industrial, political and cultural center, and seaport Estonia is a democratic parliamentary republic and is divided into fifteen counties. Estonia is one of the least-populous members of the European Union. Estonia lies in the northern part of the temperate climate zone Estonia has four seasons of near-equal length. The official language is Estonian.Võro and Seto in southern counties are spoken along with Estonian. The Estonian national flag is a tri-color- blue, black and white. The national currency is the Eestonian kroon. Estonia has over 1,400 lakes. Most are very small, with the largest, Lake Peipsi being 3,555 km² .There are many rivers in the country. The longest of them are Võhandu (162 km), Pärnu (144 km), and Põltsamaa (135 km).Estonia has numerous f...
Second level Third level Fourth level Fifth level Polytetrefluoroethylene Properities Thermoplastic polymer Hydrophobic Non-stick White solid Melting point - 327 °C Chemical resistance Inert Polytetrefluoroethylene Applications Electrical and electronic industry Metal finishing, paints and coatings Optical devices Automotive uses Cabling materials Food indusrty Polytetrefluoroethylene Safety PTFE is not dangerous in low-temperatures While PTFE is stable and nontoxic, it begins to deteriorate after the temperature of cookware reaches about 260 °C. Polytetrefluoroethylene Conclusion
Cities of Estonia The capital of Estonia is Tallinn, most famous for its Old Town. The Old Town was built in the 13.-16th centuries. You can still feel the spirit of medieval times, when you are visiting The Old Town. The second biggest city of Estonia is Tartu. Tartu is the educational centre of Estonia. It is home to the largest and oldest university in Estonia, the University of Tartu. The University of Tartu first opened it`s doors in 1632. Through Tartu flows the second biggest river in Estonia, Suur Emajõgi ( Big Mother River). Pärnu is the summer capital of Estonia. It is located in south west Estonia on the coast of Pärnu bay. Pärnu is popular with the tourists for its spas and beautiful beaches. Otepää is known as the winter capital of Estonia. With its hilly terrain it is the perfect place for winter sports. There are many tracks for snowboarders, mountain and cross country skiers. Not far from Otepää is th...
Narcotics Narcotics are dangerous and illegal. Narcotics also known as drugs have several forms. You can consume drugs in a shape of a pill, by injecting it with a needle, smoking it and even baking it into a food and then eating it. Let's focus on five drugs marijuana, ecstasy, heroin, mushrooms and LSD. 1. Marijuana Marijuana is a green and brown mix of dried flowers, stems, seeds and leaves from the hemp plant Cannabis sativa. The main active chemical is THC (tretrahydrocannabinol), which moves quickly through the bloodstream to the brain and other organs throughout the body. Marijuana is a mild hallucinogen that can also act as a depressant or a stimulant. Many people think that it's a plant, so it's natural, and natural is always good-right? Think again, because both natural and synthetic versions of marijuana can cause a long-lasting, negative impact on your developing brain
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