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Measurement of Nitrate and Nitrite

A. Nitrate Determination of nitrate-nitrogen used brucine method with reagents brucine and concentrated sulfuric acid. brucine reactions with nitric yellow forming compounds. the reaction speed is greatly influenced by the heat of solution. heating is done by adding a solution of concentrated sulfuric acid. Nitrate content measurement in addition to using brucine method can also use methods Cadnium Reduction Methode, ...

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How it Works Chemical Air Filter

A chemical filter works by capturing soluble materials, such as: gas, dissolved organic matter, and the like. This mechanism is done with the help of filter media such as activated charcoal, ion resin, and zeolites, or by fractionation of water.  1) Absorption (Absorption) Absorption is a process where a particle is trapped into the structure of the media and as ...

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Fish Diseases Caused Worms

1) Class monogenea Monogenea is a kind of worm that attacks the outer body of the fish, in terms of where the attack is divided into two types: a) The worm attacks the gills Dactylogyrus b) Gyrodactylus worm attacks the skin. While symptoms or signs of parasites in fish are: a) The gills of fish broken, wounded and bleeding arise. ...

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Working Mechanism Filter “Under Gravel”

As the name implies filter “under gravel” is a filter which is located below a layer of “gravel” (gravel, sand) at the bottom of the aquarium. Its construction consists of a layer of anti-rust material (plastic) perforated with bearing feet so as to create free space underneath to allow water to flow (Figure 5). In one of its corners (or ...

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Types of Paper Packaging

There are two main types of paper used, namely rough paper and soft paper. Paper used as packaging is a type of coarse paper, while fine paper is used for writing paper that is for books and paper covers. The most powerful packaging paper is kraft paper with natural color, made from softwood with sulphate process. Here are some types ...

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Definition of Composite Paper

Composite paper is paper that is processed together with other packaging materials such as plastics and metals, which aims to improve the brittle force, stiffness and strength of the material. Paper mixed with metal and formed into a kind of cans called composite cans, used for citric juice, spice containers (spices), chocolate boxes, dry soups, chemicals and medicines. The packaging ...

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