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...sieves are also used in size exclusion chromatography (SEC) to to separate molecules by size.

...lecules, such as water, solvents and ions, to pass while preventing larger molecules. Membrane filters usually have a pore size of 8 - 100 angstroms. They are u

...depends on the degree of conjugation and the nature of substituents on the molecules. In conservation science, this technique is most useful for the identificat

A weak attractive force between atoms or nonpolar molecules. van der Waals forces are due to dipole interactions. They are much weake

A polymer, such as an [[polyamide|aramid]] (synthetic polyamide), whose molecules maintain a crystalline formation even when in a liquid state (solution or m

...sample either with a beam of electrons (electron ionization) or with small molecules such as methane (chemical ionization). The initial ion, called the molecula

A copolymer in which the molecules of different monomers alternate as repeating units in the polymeric chain.

1) A state of matter in which the molecules move freely and randomly. The molecules rapidly expand to fill the volume of any container. Gases mix freely with o

...is stretched after the extrusion process. This process orients the polymer molecules in the direction of the filament axis and thereby making the fiber more ela

...ric acid]]. This adds water soluble sulfonic end groups to the fatty acid molecules. Sulfonated oils are used to introduce [[fatliquor|fatliquor]] hides there

...pillary action. Capillary action is caused by the attraction of the liquid molecules to each other and to the solid surface.

...emistry) A chemical reaction that results in the loss of one or more water molecules (H2O) from a chemical compound.

A common disaccharide composed of two [[glucose|glucose]] molecules. Maltose occurs naturally in [[starch|starch]] and [[glycogen|glycogen]]. M

A class of synthetic organic pigments formed by two coupled arylide molecules. Disazo condensation pigments were first developed in Europe in the mid 195

...) uses a separation column filled with a porous, semisolid material. Small molecules pass quickly through the column while larger particles are slowed by their

A type of chemical reaction in which two or more molecules combine resulting in the formation of a larger molecule and the elimination

A form of isomerism in which two organic molecules interconvert forms by the transfer of a hydrogen atom and the related doubl

...a beam of light, usually ultraviolet light, that excites the electrons in molecules of certain compounds and causes them to emit light; typically, but not nece

A class of substances in which the molecules contain at least one metal-to-carbon bond. Organometallic compounds contain

...f organic compounds in which fluorine replaces one or more of the hydrogen molecules. Fluorocarbons are resistant to heat, flame, chemicals, moisture and oxidat

...ional frequencies allows for determination of functional groups in organic molecules. The class of material (proteinaceous, cellulosic, and so forth) can then b

A substance that has the ability to selectively adhere molecules to its surface. Adsorbents are used to remove pollutants, odors, tastes, co

...t is the primary component in the cell walls of plants where the cellulose molecules are often linked together in parallel units called microfibrils. Pure cellu

...x can change over time in moist environments with [[water]] and [[oxygen]] molecules penetrating into the glass or ions migrating to the surface. This can resul

...rimethylbenzene isomers), with the remainder primarily C8 and C10 aromatic molecules. The clear, colorless solvent is used commercially as a solvent and diluent

...filtration, called reverse osmosis, uses pressure to force the small water molecules through a membrane while trapping larger minerals and contaminants.

A solid material that exists as a 3-dimensional arrangement of atoms, ions or molecules in repeating patterns. Based on the orientation and positions of the repeat

...tion to the point it forms tiny crystalline matrices that trap the solvent molecules. Gels are usually transparent, have low strengths and need external support

...Then the fibers are heated and stretched to aligned the cellulose acetate molecules. The final step is reconversion to cellulose in an alkaline solution. The p

...c polymers were made by chemically modifying naturally occurring bio-based molecules like [[cellulose]]. [[Cellulose nitrate]] (CN), invented in 1832 and patent

...to the environment; small molecules not as effectively adsorped as large molecules | Adsorb small amounts of VOCs; best for polar molecules, such as alcohols and amines

...ight-chain amylose molecules and the insoluble, branched-chain amylopectin molecules. When starch is heated, the granules swell and form a thick, tacky jelly up

...han the natural line width. No resonance is possible between free atoms or molecules

5) Ligases combine one or more molecules and

...excitation wavelengths, we can determine which wavelength excites the most molecules to fluoresce. This is called the Excitation maxima. Exposing the compound

...://community.culturalheritage.org/discussion/chelating-molecules Chelating Molecules] (discussion from Dec. 2023)

A nonmetallic element that is contained in all organic molecules. Carbon has an abundance in the earth's crust of 0.027% where it occurs as

...is brittle and fractures unevenly. When it possess a polarity because the molecules had time to line up before the magma cooled, magnetite is called lodestone.

...og. Many VOCs form ground-level ozone by “reacting” with sources of oxygen molecules such as nitrogen oxides (NOx), and carbon monoxide (CO) in the atmosphere i

...ode, which allows for detection of positively charged fragments of the dye molecules.

...munjistin and pseudopurpurin carboxyl groups. Thus these partially ionized molecules can interact with polar groups on the stationary phase of HPLC column, depe

Carbon-containing molecules that have a high vapor pressure at room temperature are referred to as [[Vo

...ilar to silica gel but with lower capacity; preferentially adsorbs polar molecules

...excitation wavelengths, it can determine which wavelength excites the most molecules to fluoresce. This is called the Excitation maxima. Exposing the material t