English

To maintain the pH of the water to remain stable at around 6.8 it is necessary a chemical process that is expressed in alkalinity. Alkalinity is the ability estab-bufffer late of bicarbonate ions, carbonate and hydroxide ions in water. The third ion in the water will react with the hydrogen ions so as to reduce acidity or pH increase. Alkalinity ...

In plants, algae iron acts as a constituent of cytochrome and chlorophyll, as well as act as enzyme systems, and electron transfer in photosynthesis, excessive iron levels greatly inhibit the fixation of other elements (Effendi, 2000). Iron also plays a role in the oxidation-reduction in the process of photosynthesis and respiration in addition to a few enzyme cofactor in plants ...

Bodies is a living environment for aquatic biota such as fish, aquatic insects, water snails, animal organisms, aquatic plants, the tiny plants and others. In this environment there will be interaction between organisms (biotic) existing water environment (abiotic) as the medium of his life, as well as the interaction between water biota itself in order to survive. This interaction thus ...

1) Temperature / temperature In addition to the high temperatures of the tropics, a problem that is often found is a problem that is too extreme temperature changes due to the influence of the season, for example the rainy season. Low temperatures will cause the speed of metabolism down so that the appetite of fish and shrimp to be decreased. ...

Some things to consider in taking the sample are: 1) Fixation Fixation is the process of sample preservation using preservatives that material taken can be processed by PCR. The principle of choosing the type of preservative: a) easy in the handling, storage and transport, b) Not reduce the sensitivity of diagnosis, c) Easily available and relatively inexpensive. There are two ...

The average depth of the water required for the growth of seaweed depending on the amount of sunlight intensity. According Soegianto and Sulistijo (1985) in Syahputra (2005), the depth of which is ideal for the growth of seaweed in the Thousand Islands with basic methods in the 0.3 to 0.6 m at its lowest ebb. Such circumstances can prevent drought ...