Many elements are required in trace amounts, usually because they play a catalytic role in enzymes.

Many aspects of the catalytic mechanism for the horse liver ADH enzyme was investigated by Hugo Theorell and coworkers.

Many ribozymes are catalytic, but some such as self-cleaving ribozymes are consumed by their reactions.

Many reactions in life sciences involve water and metal ions are often at the catalytic centers ( active sites ) for these enzymes, i. e. these are metalloproteins.

Many metal oxides have been found to have water oxidation catalytic activity, including ruthenium ( IV ) oxide ( RuO < sub > 2 </ sub >), iridium ( IV ) oxide ( IrO < sub > 2 </ sub >), cobalt oxides ( including nickel-doped Co < sub > 3 </ sub > O < sub > 4 </ sub >), manganese oxide ( including MnO2 ( birnessite ), Mn < sub > 2 </ sub > O < sub > 3 </ sub >), and a mix of Mn < sub > 2 </ sub > O < sub > 3 </ sub > with CaMn < sub > 2 </ sub > O < sub > 4 </ sub >.

Many chiral sulfoxides are prepared from asymmetric catalytic oxidation of achiral sulfides with a transition metal and a chiral ligand.

Many processes are close to adiabatic and can be easily approximated by using an adiabatic assumption, but there is always some heat loss ; as no perfect insulators exist.

Many fine chemicals are prepared via catalysis ; methods include those of heavy industry as well as more specialized processes that would be prohibitively expensive on a large scale.

Many such short processes involve a few changes to traditional methods, including smaller, more homogenized pieces in the compost, controlling carbon to nitrogen ( CN ) ratio at 30 to 1 or less, and monitoring the moisture level more carefully.

Many important processes involve photochemistry.

Many processes for software development were in their infancy, with few standard or " best practice " approaches defined.

Many overlapping methods and processes can be seen when comparing Product design, Industrial design and Engineering.

Many processes designed to preserve food will involve a number of food preservation methods.

Many chemical pickling processes also involve heating or boiling so that the food being preserved becomes saturated with the pickling agent.

Many inductors used in radio applications ( usually less than 100 MHz ) use adjustable cores in order to tune such inductors to their desired value, since manufacturing processes have certain tolerances ( inaccuracy ).

Many polyketides are cyclic molecules whose backbones are often further modified by glycosylation, methylation, hydroxylation, oxidation, and / or other processes.

Many innovations and technical refinements have been made in printing processes and presses over the years, including the development of presses with multiple units ( each containing one printing plate ) that can print multi-color images in one pass on both sides of the sheet, and presses that accommodate continuous rolls ( webs ) of paper, known as web presses.

Many observations have indicated that programmed cell death plays a considerable role during physiological processes of multicellular organisms, particularly during embryogenesis and metamorphosis.

Many properties of neurons, from the type of neurotransmitters used to ion channel composition, are maintained across species, allowing scientists to study processes occurring in more complex organisms in much simpler experimental systems.

Many catabolic biochemical processes, such as glycolysis, the citric acid cycle, and beta oxidation, produce the reduced coenzyme NADH.

Many abstractions, including eternal objects, are potential ingredients of processes.

Many technological processes produce unwanted by-products, known as pollution, and deplete natural resources, to the detriment of the Earth and its environment.

Many thermodynamic processes can be modeled by compound or composite systems, consisting of several or many contiguous component simple systems, initially not in thermodynamic equilibrium, but allowed to transfer mass and energy between them.

Many industrial processes rely on reactions using chemicals dissolved in water, suspension of solids in water slurries or using water to dissolve and extract substances.

Many legal and taxation processes culminated in this decade that led to the formation of Tax Havens and Corporate Havens throughout the developed world.

Many underlying processes, such as collision detection and network processing, run at different or inconsistent frequencies or in different physical components of a computer.

Many naturally-occurring radioisotopes ( another 51 or so, for a total of about 339 ) exhibit still shorter half-lives than 80 million years, but they are made freshly, as daughter products of decay processes of primordial nuclides ( for example, radium from uranium ) or from ongoing energetic reactions, such as cosmogenic nuclides produced by present bombardment of Earth by cosmic rays ( for example, carbon-14 made from nitrogen ).

Many of his works discuss ethical aspects of industrial inventions and processes already anticipated in the first half of the 20th century.

Many Green party constitutions are configured to prevent the party bureaucracy from accumulating too much power in the organization, in favor of more decentralized or member driven processes.

Many welding processes require the use of a particular joint designs ; for example, resistance spot welding, laser beam welding, and electron beam welding are most frequently performed on lap joints.

Many of the men on our campus have a pretty set curriculum, especially in the various engineering fields, with few electives till the senior year.

Many statisticians base ANOVA on the design of the experiment, especially on the protocol that specifies the random assignment of treatments to subjects ; the protocol's description of the assignment mechanism should include a specification of the structure of the treatments and of any blocking.

Many species in the iris family have a great economic importance in ornamental horticulture and the cut flower industry, especially Gladiolus, Freesia, Sparaxis, Iris, Tigridia ( tiger lily ), Ixia ( corn lily ), Romulea, Neomarica, Moraea ( butterfly lily ), Nemastylis, Belamcanda, Sisyrinchium ( blue-eyed grass ), Crocosmia and Trimezia.

Many Armenian companies, especially those owned by government-connected tycoons, have long reported suspiciously low earnings, thereby avoiding paying larger taxes.

Many such children live in Sambutsu especially, on the eastern coast.

Many Protestants, especially Calvinists, consider him to be one of the theological fathers of the Protestant Reformation due to his teaching on salvation and divine grace.

Many stories have developed since the founding long ago to become a part of America's folklore and cultural awareness, and non-native American folklore especially includes any narrative which has contributed to the shaping of American values and belief systems.

Many studies now indicate that chronic treatment with antipsychotics affects the brain at a structural level, for example increasing the volume of the basal ganglia ( especially the caudate nucleus ), and reducing cortical grey matter volume in different brain areas.

Many were especially critical of him following his remarks in the South Carolina primary, which Obama won.

Many systems became quite sophisticated in graphic presentation, especially considering that the system was confined to ASCII codes.

Many viral agents have been studied and / or weaponized, including some of the Bunyaviridae ( especially Rift Valley fever virus ), Ebolavirus, many of the Flaviviridae ( especially Japanese encephalitis virus ), Machupo virus, Marburg virus, Variola virus, and Yellow fever virus.

Many quotes from the Book of Job are used throughout Jewish liturgy, especially at funerals and times of mourning.

Many of his sets, especially in street scenes, bear a strong similarity to Kennington, where he grew up.

Many later CPU designs use similar mixed bit width, especially when the processor is meant for general-purpose usage where a reasonable balance of integer and floating point capability is required.

Many folk museums show examples of clothing decorated with cross-stitch, especially from continental Europe and Asia.

Many of the above concepts, especially equivalence of categories, adjoint functor pairs, and functor categories, can be situated into the context of higher-dimensional categories.

Many people of Chaoshan origin, also known as Teochiu or Teochew people, have settled in Southeast Asia, especially Singapore, Hong Kong, Cambodia and Thailand ; influences they bring can be noted in the cuisine of Singapore and that of other settlements.

Many scholars employ the term, especially those in the fields of history, cultural studies, and postcolonial theory.

Many historical reenactment groups, especially those whose focus is Antiquity or the Middle Ages, commonly use mail both as practical armour and for costuming.

Many calculators continued to use two or more integrated circuits ( ICs ), especially the scientific and the programmable ones, into the late 1970s.

Many vehicles were destroyed or commandeered by militias, especially in the north and east of the country, and the fuel supply system was also badly affected.

Many phoneticians ( especially those trained in the British school ) resort to it constantly as a quick and convenient form of reference.

Many Protestants ( especially those belonging to the magisterial traditions, such as Lutherans, or those such as Methodists, that broke away from the Anglican Communion ) accept the teachings of the first seven councils but do not ascribe to the councils themselves the same authority as Roman Catholics and the Eastern Orthodox do.