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Referat Uraniul radioactivitatea si mediul inconjurator

Uraniul radioactivitatea si mediul inconjurator

Categorie: Referate Biologie

Referat downloadat de: 206 ori.

Cauta referat dupa: radioactivitate

Descriere referat:

ABSTRACT: The radiatios and the natural radioactivity have always made part of the environment, but because of the absence of their impact on human’s senses, they have relatively late took the attention of scientists. From the radiations and the radioactive materials, by now, several applications concerning the radionuclides properties were introduced and also new technologies were created, the result of all these being the radioactive products wanted or not. In consequence any person on the Earth is permanently submitted to the radiations activity which proceed from both natural and artificial sources. In these terms any protection system against radiations must have a well defined domain. The estimation of doses recived from every source is a permanent preoccupation of some international and n national organizations.

Alte referate din materia: Biologie

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1	Feriga	385
2	Affenpinscher-ul	213
3	Anaconda	472
4	Aripi	222
5	Bauceron-ul	215
6	Bobtail sau Old English Sheepdog	209
7	Celulaprocariota	241
8	Ciobanescul Belgian sau Groenendael	187
9	Fetele aflate la pubertate	317
10	Salvati planeta	760
11	Uraniul radioactivitatea si mediul inconjurator	206
12	Ursul Carpatin	351
13	Totul sau aproape totul despre dinozauri	734
14	Tropisme, nutatiile si nastiile la plante	747
15	Tulburarile somnului	679
16	Tumorile	672
17	Ulcerul gastroduodenal	611
18	Ultimii dinozauri	550
19	Urechea	932
20	Ursul Koala	870
21	VULTURI	679
22	Valoarea nutritiva si terapeutica a vitaminelor	503
23	Vederea Stereoscopica	500
24	Veghea, somnul si activitatea cerebrala	557
25	Vertebrate acvatice	880

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