Lec5 Flashcards
Temperature influences in oil biodegradation through its influence on?
- physicochemical characteristics of the oil.
- activity of microbial enzymes.
biochemical reactions exponentially decrease with decreasing temperature.
T/F?
T
What is the problem with many insecticides?
is that the organism’s resistance develops rapidly, in10–20 years.
List the Common Endocrine disruptions:
- Canned food
- Personal care products
- Cleaning products
- Kitchen products
- Drinking water
- Produce grown conventionally
Why Environmental effects of nanomaterials it difficult to understand?
Because their form in the environment is poorly known.
first major source of aquatic contamination
- household
- industrial wastewater.
way that agricultural contaminants, both fertilizers and pesticides, reach aquatic systems.
leaching from land (second significant source of contaminants)
Leaching depends on the?
distance between the place of application and the water body.
What we can used To reduce fertilizer runoff to water bodies?
Used “safety zones” between cultivated land
and water bodies.
long-distance transport of contaminants depends on?
air currents and water.
metal uptake may occur via:
- Na+Ca pumps.
- Na/K/Ca co-transporters.
- Na/P (proton) exchange.
increase in the amount of chemical in the tissues of organisms across trophic levels.
Defention for what?
Biomagnification
bioaccumulation of lipophilic compounds depends on:
o temperature.
o presence of humic acids.
o and pH.
Give an examples of biomagnification
- contaminated Pesticides like DDT
- heavy metals like mercury, arsenic - - - - -industrial chemicals like polychlorinated biphenyls or PCBs
Contaminated substances are resistant to degradation and can persist in the environment for short periods.
T/F?
F, long periods
