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Ash From Thermal Power Plants as Secondary Raw Material

Ash From Thermal Power Plants as Secondary Raw Material

The basic characteristic of thermal power plants in the Republic of Serbia is that they use low-grade brown coal (lignite) as a fuel. Depending on the location of coal mines, lignite may have different properties such as heating value, moisture, and mineral content, resulting in different residue upon combustion. Because of several million tonnes of ash and slag generated every year, their granularmetric particle size distribution, and transport and disposal methods, these plants have a negative impact on the environment. According to the waste classification system in the Republic of Serbia, ash and slag from thermal power plants are classified as hazardous waste, but with an option of usability. The proposed revision of waste legislation in Serbia brings a number of simple and modern solutions. A procedure is introduced which allows for end-of-waste criteria to be set, clarifying the point where waste ceases to be waste, and thereby introducing regulatory relief for recycled products or materials that represent low risk for the environment. The new proposal refocuses waste legislation on the environmental impacts of the generation and management of waste, taking into account the life cycle of resources, and develops new waste prevention programmes. Stakeholders, as well as the general public, should have the opportunity to participate in the drawing up of the programmes, and should have access to them.

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Antineoplastic Drugs as a Potential Risk Factor in Occupational Settings: Mechanisms of Action at the Cell Level, Genotoxic Effects, and Their Detection Using Different Biomarkers

Antineoplastični Lijekovi Kao Čimbenik Rizika u Radnom Okolišu: Mehanizmi Djelovanja na Razini Stanice i Pregled Metoda za Otkrivanje Njihovih Genotoksičnih Učinaka

U članku je prikazana osnovna podjela antineoplastičnih lijekova prema mehanizmima djelovanja na razini stanice. Objašnjeni su mehanizmi genotoksičnosti najvažnijih vrsta lijekova koji se primjenjuju u okviru uobičajenih protokola za liječenje zloćudnih novotvorina. Navedena je važeća klasifikacija antineoplastika prema kancerogenom potencijalu, podaci o mutagenom potencijalu te je prikazana njihova podjela u skladu s anatomsko-terapijsko-kemijskim sustavom klasifikacije. Sustavno su prikazani najvažniji rezultati svjetskih i hrvatskih istraživanja na populacijama radnika izloženih antineoplasticima, provedenih u razdoblju 1980.-2009. s pomoću četiri najčešće primjenjivane metode: analize izmjena sestrinskih kromatida, analize kromosomskih aberacija, mikronukleus-testa i komet-testa. Objašnjena su osnovna načela navedenih metoda te raspravljene njihove prednosti i nedostaci. Biološki pokazatelji daju važne podatke o individualnoj osjetljivosti profesionalno izloženih ispitanika koji mogu poslužiti unaprjeđenju postojećih uvjeta rada i upravljanju rizicima pri izloženosti genotoksičnim agensima. Na osnovi prednosti i nedostataka citogenetičkih metoda zaključeno je da je mikronukleus-test, koji podjednako uspješno dokazuje klastogene i aneugene učinke, jedna od najboljih metoda dostupnih za otkrivanje štetnih djelovanja antineoplastičnih lijekova koji su u aktivnoj primjeni.

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An Experiment to Develop Conversion Factors to Standardise Measurements of Airborne Asbestos

An Experiment to Develop Conversion Factors to Standardise Measurements of Airborne Asbestos

Various researchers and agencies recommend different conversion factors for different asbestos exposures. The aim of this study was to develop conversion factors from particles per cm3 (p cm-3) to fibres per cm3 (f cm-3) and from mg m-3 to f cm-3.

More than 1000 exposure measurements were available in the Slovenian asbestos-cement factory Salonit Anhovo. Three types of measurement of asbestos concentrations in the air were used: a konimeter measuring p cm-3, a gravimetric method measuring mg m-3 and a membrane filter method measuring f cm-3. Operation-specific conversion factors among these methods were developed. One conversion factor was obtained for asbestos-pipe-dry jobs (4.7) and one for asbestos-sheet-dry jobs (1.6). Only one conversion factor (0.8) was used for asbestos-cement-pipe-wet and asbestos-cement-pipe-dry jobs. For asbestos cement sheets, two conversion factors were obtained (0.3 and 1.2).

The development of five different conversion factors made it possible to calculate cumulative exposure to asbestos from historical data and to decrease exposure misclassification.

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School Choice and Vocational Guidance for Schoolchildren With Chronic Diseases and Other Health Problems

). Međunarodna klasifikacija bolesti i srodnih zdravstvenih problema (Deseta revizija). Svezak 1. Zagreb: Medicinska naklada; 1994. Pravilnik o osnovno školskom odgoju i obrazovanju učenika s teškoćama u razvoju NN 23/1991 [pristup 2. studenog 2009.]. Dostupno na: http://narodnenovine.nn.hr/clanci/sluzbeni/254310.html Decisions Without Direction Career Guidance and Decision-Making Among American Youth. Conducted for Ferris State University's Career Institute for Education and Workforce Development, in partnership with the

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Dance as a Risk Factor for Injuries and Development of Occupational Diseases

://www.hzzzsr.hr/?what=content&ID=70&cat=68 Državni zavod za statistiku. Nacionalna klasifikacija zanimanja 2010. - NKZ 10. Narodne novine 147/2010.

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Relationship Between Osteonecrosis of the Jaw and Bisphosphonate Treatment

bisphosphonates - histomorphologic analysis in comparison with infected osteoradionecrosis. J Oral Pathol Med 2006;35:155-60. Bosak A. Organofosforni spojevi: klasifikacija i reakcije s enzimima. Arh Hig Rada Toksikol 2006;57:445-57. Rainer Ž. Statini u primarnoj i sekundarnoj prevenciji koronarne bolesti. Medicus 2003;12:85-90. Roelofs AJ, Thompson K, Gordon S, Rogers MJ. Molecular mechanism of action of bisphosphonates: current status. Clin Cancer Res 2006;12(Suppl 20):6223S-30S

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Cholinesterases: Structure, Role, and Inhibition

by click chemistry: target-guided optimization of acetylcholinesterase inhibitors. J Am Chem Soc 2005;127:6686-92. Brufani M, Filocamo L. Rational design of cholinesterase inhibitors. U: Giacobini E. urednik. Cholinesterases and cholinesterase inhibitors. London: Martin Dunitz Ltd.; 2000. str. 27-46. Bosak A. Organofosforni spojevi: klasifikacija i reakcije s enzimima. Arh Hig Rada Toksikol 2006;57:445-57. Worek F, Thiermann H, Szinicz L, Eyer P. Kinetic analysis of interactions between

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