#mole

• Acrosyndesis — A cytogenetic phenomenon or particular type of meiotic synapsis characterized by the pairing, association, or partial fusion of homologous chromosomes exclusively at their distal extremities (telomeres or terminal regions), while the intercalary and centromeric segments remain free and unaligned. This restrictive chromosomal structure directly influences the crossing-over process and the genetic recombination rate within those specific zones.
• Aquasol — A colloidal system consisting of a stable solution or suspension where the structural dispersion medium is water, and the dispersed phase consists of microscopic solid particles or hydrophilic macromolecules; also, in pedology, the term can generically refer to a soil type strongly influenced by the presence of groundwater or stagnant water. This compound plays a major role in biochemical processes, facilitating efficient nutrient transport.
• Adelomycete — A scientific term used to designate a microscopic fungus belonging to a group characterized by incomplete developmental stages or hidden, inconspicuous, or partially unknown reproductive structures. This type of mycotic organism, often classified in the past among imperfect fungi, exhibits a complex biological cycle analyzed in the laboratory to determine its forms of reproduction.
• Adenine — A fundamental purine nitrogenous base, with a heterocyclic structure composed of two condensed rings, an essential component of nucleic acids (DNA and RNA). It plays a crucial structural role in storing and transmitting genetic information through specific hydrogen bonds with thymine or uracil, being also a key element in molecules vital for cellular energy metabolism, such as ATP.
• Adhesive — Spelling variant or secondary technical form for the word 'adeziv' (adhesive). As a noun, it designates a substance capable of structurally fixing or bonding two surfaces through direct contact and molecular attraction. As an adjective, it describes a property of a body or material to manifest adherence, to stick, or to remain tightly joined to another layer or support.
• Adhesive — Having the property of sticking or tightly fixing two different surfaces or bodies through direct contact; a fluid, viscous, or solidified substance used industrially to achieve permanent or temporary bonds. In a structural sense, it describes a reactive film or backing tape capable of developing high intermolecular attraction forces at the contact layers.
• DNA — Deoxyribonucleic acid; a complex macromolecule formed by a double helical strand of nucleotides, which constitutes the material basis of genetic information in all living organisms and most viruses. Structurally, it contains the genes responsible for heredity, development, and biological functioning, primarily located within the cell nucleus.
• Adsorbate — A fluid substance (gas, liquid, or dissolved solute) whose molecules are attracted, retained, and concentrated as an extremely thin molecular film upon the surface of a solid or liquid substrate (the adsorbent). The adsorbate constitutes the mobile component within the system prior to adhesion and the resulting layer on the interface after the process. Its energetic state and molecular dynamics change radically upon interacting with active sites.
• Adsorption — The act of adsorbing and its dynamic outcome; the physical-chemical process by which a fluid accumulates across a limited superficial boundary, forming a fine molecular film. It is the verbal action noun equivalent to the more common term 'adsorption', sometimes preferred in technical Romanian texts to emphasize the operational duration of surface capture.
• Adsorbed — Bound and retained upon the surface or interface of a solid or liquid substrate (adsorbent) via intermolecular forces or chemical bonds. The term describes the state of molecules, ions, or atoms originating from a fluid phase that have left the bulk medium to form a thin, concentrated layer at the boundary between two phases.
• Air ion — An electrically charged positive or negative particle in the Earth's atmosphere, formed by a gas atom or molecule (or a small cluster of molecules attached around it) that has lost or gained one or more electrons under the action of cosmic, ultraviolet, or electrical discharge radiation.
• Agonist — The feminine form of the term agonist; designates a substance, molecule, or drug capable of activating a cellular receptor, or an adjectival reference to a prime mover muscle action initiating a physical movement.
• Aggregation — A form of union, grouping, or close association of multiple independent elements, statistical data, cells, or mineral particles into a single mass, without completely losing their chemical or structural individuality. In sociology, it represents a temporary or permanent collective formation based on individuals alignment.
• Alkali cellulose — An intermediate product obtained in the chemical industry by treating cellulose with a concentrated solution of sodium hydroxide (caustic soda). This compound plays an essential structural role in the manufacture of viscose, rayon, and cellophane, facilitating the subsequent chemical reactivity of fibers by altering the macromolecular molecular arrangement.
• Alkane — A generic name given to saturated acyclic hydrocarbons with linear or branched chains, containing exclusively single sigma bonds between carbon atoms and having the general molecular formula CnH2n+2. Alkanes (historically termed paraffins) exhibit relatively low chemical reactivity at room temperature and constitute the primary component of natural gas and petroleum (e.g., methane, ethane, propane, butane).
• Alkene — A generic name given to unsaturated acyclic hydrocarbons with linear or branched chains, containing a single covalent carbon-carbon double bond (C=C) and having the general molecular formula CnH2n. Alkenes (historically termed olefins) exhibit a much higher chemical reactivity than alkanes, being capable of participating in addition, polymerization, and oxidation reactions (e.g., ethene, propene, alkene isomers).
• Alkyl — A generic name given to monovalent, saturated, acyclic hydrocarbon radicals, theoretically obtained by removing a hydrogen atom from an alkane. They possess the general molecular formula CnH2n+1 and are structurally named by replacing the suffix '-ane' of the corresponding alkane with the suffix '-yl' (e.g., methyl, ethyl, propyl, butyl), serving as fundamental components in organic compound synthesis.
• Alkyne — A generic name given to unsaturated acyclic hydrocarbons with linear or branched chains, containing a single covalent carbon-carbon triple bond (-C≡C-) and having the general molecular formula CnH2n-2. Alkynes (historically termed acetylenes) are compounds with very high chemical reactivity, easily participating in addition and polymerization reactions, with major industrial applications as raw materials in organic synthesis.
• Aldolization — A nucleophilic addition chemical reaction in which two molecules of carbonyl compounds (aldehydes or ketones) possessing alpha-hydrogen atoms combine to form a beta-hydroxyaldehyde or a beta-hydroxyketone (an aldol). This structural process represents the first stage of the aldol condensation and is fundamental in industrial organic synthesis and cellular metabolic pathways.
• Aldoxime — A nitrogenous organic compound belonging to the oxime class, formally or practically obtained through the condensation reaction of an aldehyde with hydroxylamine (NH2OH), having the general structure R-CH=N-OH. This type of oxime is characterized by the presence of a hydrogen atom bonded to the azomethine carbon, unlike ketoximes, serving as a valuable intermediate in nitrile and amide synthesis.