biodeterioration, textiles biodeterioration, timber biodeterioration, fuels biodeterioration, glass biodeterioration, stone biodeterioration, concrete biodeterioration, rubber biodeterioration, metal biodeterioration, control of biodeterioration, prevention of biodeterioration

1. Describe BIODETERIORATION b.stev

2. AN undesired change to the property in material/s caused by SOME organisms The impact on the materials listed and a method of prevention follow metals What is it? timber glass concrete rubber textiles stone fuels

3. MOIST wood CAN grow cellular fungus ROT : dark brown spots INSECTS: termites/ boers gnaw MARINE BOERS: piles of the structures : hulls of wooden ships/ boats MOLDS: threat in damp regions MICROBES: draw at the wood

5. ALL stages: process & storage FUNGI: most common biodeteriorant Causes : - breaks in the molecules - elongation of thread - loss in strength - discolouration TEXTILES

7. (Studentsguide.in, 2008)

8. H 2 O in fuel systems allows microbe growth CAUSES ECONOMIC LOSS & IS HAZARDOUS ‏ fuels:

9. & are microbes THAT CAUSE THESE DEFECTS : ALSO : a fungus in KEROSENE Hormoconis resinal Psuedomonas Desulfovibrio some MOULDS thrive > stickiness ( viscosity ) : roads/ asphalt / pipe linings

10. organoboron isothiazolones can be added: controls bio-deterioration > FUEL AVIATION fuels tanks drained before flight this rids collected H2O carries microbes (Institute for energy and environment, 2008)

11. Glass

13. Stone Biodeteriorants to stone are: Microbes, Fungi, Algae, Lichens & Mosses WET/DRY cycles of the TROPICS : loosens & fragments stone. THEN - IS susceptible to biochemical factors

14. Detachment of materials Black/brown crust Exfoliation Plant roots cause damage Discolouration White/gray powder White fluoroescence Stains Patches Pitting Cracks SHOW as:

15. ERADICATION is in 2 STEPS: one week: KILLS growth BRUSH off - bristle brush. TREATMENT: inhibit growth.

18. ALSO USED : COPPER NAPTHALENE PENTACHLOROPHENOL POROUS / H 2 O -SATURATED CONCRETE - SCALES the H 2 O inside freezes H 2 O carries many CHEMICALS acids/ sulfates/ chlorides

19. INSULATIVE ELECTRICAL CABLE DECAY IS A HAZARD BURIED CABLES: electrical, communication, sealing rings of sewage pipes (Students guide.in, 2008)

20. Metals: corrosive (Students guide.in, 2008)

21. Bibliography Martin.S.V. (2001). How glass is made . Retrieved August 26, 2008, from http//:www.texas glass .com/ glass _facts/How_ Glass _ made .htm Maruthamuthu .S. (2008). Role of air microbes on atmospheric corrosion . Retrieved August 26, 2008 from http//: www.ias.ac.in/currsci/f eb102008/359.pdf NAHB Research Center . (2008). Can water cause deterioration of concrete . Retrieved August 28, 2008, from http//: www.toolbase.org/Toolbase Resources/level4FAQ.aspx?ContentDetailID=3547&BucketID=5& =25 - 18k Forest Research NZ. (2008). Timber preservation. Retrieved August 19, 2008 from, http//: www.nzic.org.nz/ChemProcesses/forestry /4B.pdf -

23. Students guide.in. (2008). Biodeterioration, microbial deterioration, microorganisms, enzymes . Retrieved September 6, 2008, from http//:www.studentsguide. in/microbiology/biodegradation-bioremediation- biodeterioration / biodeter ioration .htm Morton. G. (2003). Aug 03 101 156 . Retrieved September 6, 2008, from http//: www.sgm.ac.uk/pubs/micro_today/pdf/080301.pdf