Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances. Chemistry also addresses the nature of chemical bonds in chemical compounds.
Distillation, also classical distillation, is the process of separating the component substances of a liquid mixture of two or more chemically discrete substances; the separation process is realized by way of the selective boiling of the mixture and the condensation of the vapors in a still.
Filtration is a physical separation process that separates solid matter and fluid from a mixture using a filter medium that has a complex structure through which only the fluid can pass. Solid particles that cannot pass through the filter medium are described as oversize and the fluid that passes through is called the filtrate. Oversize particles may form a filter cake on top of the filter and may also block the filter lattice, preventing the fluid phase from crossing the filter, known as blinding. The size of the largest particles that can successfully pass through a filter is called the effective pore size of that filter. The separation of solid and fluid is imperfect; solids will be contaminated with some fluid and filtrate will contain fine particles. Filtration occurs both in nature and in engineered systems; there are biological, geological, and industrial forms. In everyday usage the verb "strain" is more often used; for example, using a colander to drain cooking water from cooked pasta.
Hermeticism, or Hermetism, is a philosophical and religious tradition rooted in the teachings attributed to Hermes Trismegistus, a syncretic figure combining elements of the Greek god Hermes and the Egyptian god Thoth. This system encompasses a wide range of esoteric knowledge, including aspects of alchemy, astrology, and theurgy, and has significantly influenced various mystical and occult traditions throughout history. The writings attributed to Hermes Trismegistus, often referred to as the Hermetica, were produced over a period spanning many centuries and may be very different in content and scope.
Refining is the process of purification of a (1) substance or a (2) form. The term is usually used of a natural resource that is almost in a usable form, but which is more useful in its pure form. For instance, most types of natural petroleum will burn straight from the ground, but it will burn poorly and quickly clog an engine with residues and by-products. The term is broad, and may include more drastic transformations, such as the reduction of ore to metal.
Thaumaturgy, derived from the Greek words thauma (wonder) and ergon (work), refers to the practical application of magic to effect change in the physical world. Historically, thaumaturgy has been associated with the manipulation of natural forces, the creation of wonders, and the performance of magical feats through esoteric knowledge and ritual practice. Unlike theurgy, which focuses on invoking divine powers, thaumaturgy is more concerned with utilizing occult principles to achieve specific outcomes, often in a tangible and observable manner. It is sometimes translated into English as wonderworking.
The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer. Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al2O3), the rest being a mixture of silica, various iron oxides, and titanium dioxide. The aluminium oxide must be further purified before it can be refined into aluminium.
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. The verb form of sublimation is sublime, or less preferably, sublimate. Sublimate also refers to the product obtained by sublimation. The point at which sublimation occurs rapidly is called critical sublimation point, or simply sublimation point. Notable examples include sublimation of dry ice at room temperature and atmospheric pressure, and that of solid iodine with heating.
Azoth is a universal remedy or potent solvent sought after in the realm of alchemy, akin to alkahest—a distinct alchemical substance. The quest for Azoth was the crux of numerous alchemical endeavors, symbolized by the Caduceus. Initially coined to denote an esoteric formula pursued by alchemists, akin to the Philosopher's Stone, the term Azoth later evolved into a poetic expression for the element mercury. The etymology of 'Azoth' traces to Medieval Latin as a modification of 'azoc,' ultimately derived from the Arabic al-za'buq (الزئبق), meaning 'the mercury.'
Trituration is the name of several different methods used to process materials. In one sense, it is a form of comminution. In another sense, it is the production of a homogeneous powdered material by mixing and grinding component materials thoroughly. For example, a dental amalgam is formed by combining particles of a metal, usually gold or silver, with mercury.
Chinese alchemy is a historical Chinese approach to alchemy, a pseudoscience. According to original texts such as the Cantong qi, the body is understood as the focus of cosmological processes summarized in the five agents of change, or Wuxing, the observation and cultivation of which leads the practitioner into alignment and harmony with the Tao. Therefore, the traditional view in China is that alchemy focuses mainly on longevity and the purification of one's spirit, mind and body, providing, health, longevity and wisdom, through the practice of Qigong and wuxingheqidao. The consumption and use of various concoctions known as alchemical medicines or elixirs, each of which having different purposes but largely were concerned with immortality.
Iatrochemistry is an archaic pre-scientific school of thought that was supplanted by modern chemistry and medicine. Having its roots in alchemy, iatrochemistry sought to provide chemical solutions to diseases and medical ailments.
In Thelema, the Abyss represents a metaphysical concept that signifies the great chasm or void separating the manifest world from its divine source. Aleister Crowley, the founder of Thelema, extensively explored and integrated this concept into his esoteric teachings, imbuing it with deep spiritual significance.
A mechanical biological treatment (MBT) system is a type of waste processing facility that combines a sorting facility with a form of biological treatment such as composting or anaerobic digestion. MBT plants are designed to process mixed household waste as well as commercial and industrial wastes.
Fragrance extraction refers to the separation process of aromatic compounds from raw materials, using methods such as distillation, solvent extraction, expression, sieving, or enfleurage. The results of the extracts are either essential oils, absolutes, concretes, or butters, depending on the amount of waxes in the extracted product.
In chemistry, fractional crystallization is a stage-wise separation technique that relies on the liquid–solid phase change. This technique fractionates via differences in crystallization temperature and enables the purification of multi-component mixtures, as long as none of the constituents can act as solvents to the others. Due to the high selectivity of the solid–liquid equilibrium, very high purities can be achieved for the selected component.
A chemical substance is a unique form of matter with constant chemical composition and characteristic properties. Chemical substances may take the form of a single element or chemical compounds. If two or more chemical substances can be combined without reacting, they may form a chemical mixture. If a mixture is separated to isolate one chemical substance to a desired degree, the resulting substance is said to be chemically pure.
Mullā Muḥammad b. Murtaḍā b. Maḥmūd al-Kāshānī knows as Mullā Muḥsin & al-Fayḍ al-Kāshānī was an Iranian Akhbari Twelver Shi'i Muslim, mystic, poet, philosopher, and muhaddith.
There is significant scholarly debate about the Taoist understanding of death. The process of death itself is described as shijie or "release from the corpse", but what happens after is described variously as transformation, immortality or ascension to heaven. For example, the Yellow Emperor was said to have ascended directly to heaven in plain sight, while the thaumaturge Ye Fashan was said to have transformed into a sword and then into a column of smoke which rose to heaven.
