CHEMISTRY GLOSSARY

Results 81–90 of 1369 for s.t.p.

percolation → perkolacija

Percolation is a procedure of extraction of a material in special pipes through which a solvent is gradually released.

perfect crystal → savršeni kristal

Perfect crystal is a crystal with no defects or impurities made of completely identical repeating subunits. Further, a perfect crystal has only one possible arrangement of subunits, with every subunit making exactly the same contribution to the total energy of the crystal.

isoelectric point → izoelektrična točka

Isoelectric point (pI or IEP) is the pH of a solution or dispersion at which the net charge on the molecules or colloidal particles is zero. In electrophoresis there is no motion of the particles in an electric field at the isoelectric point. The net charge (the algebraic sum of all the charged groups present) of any amino acid, peptide or protein, will depend upon the pH of the surrounding aqueous environment. For example, alanine can have a charge of +1, 0, or -1, depending on the pH of the solution in which it is dissolved.

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perfume → parfem

Perfumes are mixtures or alcohol solutions of natural or synthetic volatile substances of a pleasant aroma, usually containing plant ethereal oils or relative esters, ethers, aldehydes and ketones.

perlon → perlon

Perlon is a polyamide synthetic mass from which fibres similar to plastic are produced.

permanent hardness → stalna tvrdoća

Permanent hardness in water is hardness due to the presence of the chlorides, nitrates and sulphates of calcium and magnesium, which will not be precipitated by boiling. The lime scale can build up on the inside of the pipe restricting the flow of water or causing a blockage. This can happen in industry where hot water is used.

permeability → permeabilnost

Permeability (Latin permeare, to pass through) is a passage or diffusion of a gas, vapour, liquid, or solid through a material without physically or chemically affecting it.

peroxide → peroksid

Peroxides are compounds of structure ROOR in which R may be any organic group. In inorganic chemistry, salts of the anion O₂^2-. They are strong oxidising agents.

pesticide → pesticid

Pesticides are chemical means against pests in agriculture. They are used for annihilation of weed (herbicides), insects (insecticides) and funguses (fungicides). They have a toxic effect on man and are the most frequent cause of food pollution.

petrochemicals → petrokemikalije

Petrochemicals are the industrially important organic chemicals which are derived from petroleum or natural gas.

Citing this page:

Generalic, Eni. "S.t.p.." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. {Date of access}. <https://glossary.periodni.com>.