diplomsko delo
Staša Jerman Zagorc (Avtor), Iztok Devetak (Mentor), Miha Slapničar (Komentor)

Povzetek

Barve nas obkrožajo in spremljajo vsak dan in na vsakdanjem koraku. Pojem barve pa vseeno ni tako samoumeven, kot sem nam zdi. Povezan je s svetlobo in je fizikalni pojav, barvilo pa je snov, ki obarva druge materiale s posebnimi tehnikami. Poznamo naravna in sintetična barvila. Prva so pridobljena iz naravnih virov, druga pa so sintetično pridobljena. Naravna barvila se delijo na derivate izoprena, pirola, pirimidina, pirana in kinona, sintetična pa na azo barvila, žveplova barvila, indigoidna barvila, antrakinonska in trifenilmetanska barvila. Kromatografija je postopek ločevanja snovi iz zmesi. Poznamo različne delitve kromatografije, in sicer glede na: interakcijo (absorbcijska, porazdelitvena, ionsko izmenjevalna in izključitvena), mobilno fazo (plinska, tekoča) in aparaturo za stacionarno fazo (kolonska, planarna). Od tod izhaja več tipov kromatografije, pri čemer so najbolj poznane papirna, tankoplastna, plinska in gelska kromatografija. Preprost in obenem zelo zahteven in zapleten postopek nudi hitre in učinkovite rezultate ločevanja zmesi. Zaradi enostavne praktične izvedbe ga lahko kot eksperiment uporabljamo v osnovnih in srednjih šolah. S pojmom kromatografija se učenci srečajo v 7. razredu osnovne šole pri predmetu naravoslovje. Raziskave kažejo, da je učenje z raziskovanjem učencem veliko zanimivejše in da je znanje, ki ga pri tem dobijo, bolj poglobljeno in trajnejše. Izdelan je bil PROFILES učni modul z naslovom »Ali so sintetična barvila zmes barvil?«, ki obravnava vsebine naravnih in sintetičnih barvil ter različne metode ločevanje snovi iz zmesi. PROFILES učni modul je bil projekt 7. evropskega okvirnega programa in temelji na učenju in poučevanju naravoslovnih vsebin, ki temeljijo na socio-naravoslovnem kontekstu.

Ključne besede

barve;naravna barvila;sintetična barvila;PROFILES učni modul;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.11 - Diplomsko delo
Organizacija: UL PEF - Pedagoška fakulteta
Založnik: [S. Jerman Zagorc]
UDK: 54:373.32.016(043.2)
COBISS: 11729737 Povezava se bo odprla v novem oknu
Št. ogledov: 632
Št. prenosov: 113
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: Developing inquiry-based science education on the chromatography for primary school
Sekundarni povzetek: Colors surround us and accompany us every day and everyday steps. However, the concept of color is not as self-evident as we think. The appearance of color is associated with light and is a physical phenomenon. The color is a substance that colored other materials with special techniques. We know natural and synthetic dyes. The first is obtained from natural sources, the other is synthetically derived. Natural dyes are divided into isoprene, pyrrole, pyrimidine, pyran and quinone derivatives, synthesized on azo dyes, sulfur dyes, indigoid dyes, anthracycline and triphenylmethane dyes. Chromatography is the process of separating substances from the mixture. Different chromatographic divisions are known, depending on the interaction (absorption, distribution, ion - exchange and exclusion), looking at the mobile phase (gas, liquid) depending on the stationary phase apparatus (columnar, planar). This leads to several types of chromatography. Of which the best known are paper chromatography, thin-layer, gas and gel. As simple as a very demanding and complex process, it provides quick and effective results of the separation of the mixture. Due to the simple practical implementation, it can be used as an experiment in primary and secondary schools. With the term chromatography students meet in the 7th grade of elementary school. Research shows that learning through research is much more interesting for students and knowledge that they get more profound and lasting. A PROFILES learning module entitled "Are synthetic dyes a mixture of colorants?", Which deals with the content of natural and synthetic dyes and different methods of separating substances from the mixture, was created. The PROFILES learning module was the project of the 7th European Framework Program and is based on the teaching and teaching of natural science content based on the socio-natural context.
Sekundarne ključne besede: primary education;chemistry;osnovnošolski pouk;kemija;
Vrsta datoteke: application/pdf
Vrsta dela (COBISS): Diplomsko delo/naloga
Komentar na gradivo: Univ. v Ljubljani, Pedagoška fak.
Strani: VI, 67 f.
ID: 10865642