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Autotrophic

(Environmental Engineering) Organisms which utilize inorganic carbon for synthesis of protoplasm. Ecologists narrow the definition further by requiring that autotrophs obtain their energy from the sun. In microbiologist parlance, this would be a photoautotroph. See photoautotrophic and chemoautotrophic.

carbon rundum stone

หินสำหรับลับโลหะมีคม, หินสำหรับลับทองขาวหรือคอนแทคท์

Amino acid

(Environmental Engineering) A functional group which consists of a carbon with a carboxylic acid, "-COOH" and an amine, "-NH2." These compounds are the building blocks for proteins.

mineralised carbon

ถ่านแท่งสำหรับใช้โคมไฟ ที่ได้แสงสว่างจากกระแสไฟฟ้าผ่านช่องระหว่างปลายถ่านสองแท่งที่หันปลายเข้าหากัน มักเรียกกันว่า ไฟอ๊าค

Black Oil Tempered Spring Steel Strip (Scaleless Blue)

(english) A flat cold rolled usually .70/.80 medium high carbon steel strip, blue-black in color, which has been quenched in oil and drawn to desired hardness. While it looks and acts much like blue tempered spring steel and carries a Rockwell hardness of C44/47, it has not been polished and is lower in carbon content. Used for less exacting requirements than clock spring steel, such as snaps, lock springs, hold down springs, trap springs, etc. It will take a more severe bend before fracture than will clock spring, but it does not have the same degree of spring-back.

Ketones

(Environmental Engineering) Organic compounds with two hydrocarbon groups bonded to a carbonyl group.

salt of tartar

(เคมี) คือ Potassium carbonate , K2CO2. H2O

Brass

(english) An alloy that is 70% copper,30% zinc. One of the most widely used of the copper-zinc alloys; malleable and ductile; excellent cold-working but poor hot-working and machining properties; excellent for soft-soldering; good for silver alloy brazing or oxyacetylene welding, but fair for resistance or carbon-arc welding. Used for drawn cartridges, tubes, eyelets machine items and snap fasteners.

Blacking Hole

(english) Irregular-shaped surface cavities in a casting containing carbonaceous matter. Caused by spilling off of the blacking from the mold surface.

Heterotrophic

(Environmental Engineering) A group of organisms which obtain carbon for synthesis from other organic matter or proteins.

carbonizing

ผงเขม่าถ่าน, ผงเขม่าคาร์บอน

Decomposers

(Environmental Engineering) Organisms which utilize energy from wastes or dead organisms. Decomposers complete the cycle by returning nutrients to the soil or water and carbon dioxide to the air or water.

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