Določanje količine vitamina C v hrani

Vitamin C (askorbinska kislina) je vodotopen vitamin, ki je ključen antioksidant v človeškem telesu. Uvrščen je na seznam Svetovne zdravstvene organizacije esencialnih zdravil, saj se uporablja za zdravljenje skorbuta, tj. bolezen, pri kateri se pojavi napaka pri nastanku kolagena zaradi pomanjkanja askorbinske kisline. V nasprotju s prepričanjem splošne populacije redno uživanje vitamina C kot prehranskega dodatka ne preprečuje prehlada, lahko pa skrajša čas obolelosti. Hrana, ki vsebuje večje količine vitamina C, so citrusi, paradižnik, rdeča paprika in krompir. Vitamin C lahko dobimo s hrano v dveh oblikah, in sicer kot askorbinsko kislino, ki je močan reducent, ali v oksidirani obliki kot dehidroaskorbinsko kislino. Čeprav se vitamin C nahaja v telesnih tekočinah večinoma v reducirani obliki, sta tako askorbinska kislina kot tudi dehidroaskorbinska kislina biološko aktivni in se v organizmu v encimsko kataliziranih reakcijah oksidacije in redukcije pretvarjata ena v drugo.

Workforce in Chemistry

Chemistry is everywhere in our daily life and there are many jobs chemistry graduates do. Around 540,000 students study chemistry, physics, astronomy, and earth science in the EU. Chemistry graduates work as analysts, healthcare scientists, clinical chemists, forensic scientists, nanotechnologists, pharmacologists and toxicologists among others. Jobs for chemists, other scientists and engineers grew by 7% in the past five years. Jobs for technicians in the field grew by 2%. Overall, they account for 7% of all jobs in the EU. As of 2016, around 15 million European science and engineering workers are employed. They work in a variety of sectors, many of which related with chemical industry, such as agrochemicals, metallurgical, petrochemicals, pharmaceuticals, and plastics and polymers. Many also work in professional services, utilities, and in the education systems. In the next years, jobs for chemistry scientists, other researchers and engineers will increase by 13%, and jobs for science and engineering technicians will increase by 2%.

Group

1-30

Duration

45 min

Number of staff

Science Discipline

Chemistry

Education Level

12-18 years

Installation effort

No installation required on typical computer

Knowledge prerequisites

Intermediate

Setting

Classroom use
Home use

Supervision required

Parent (legal guardian supervision required
Teacher supervision required

Technical requirements

You'll need to buy some materials
Printed materials required