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Al-Youbi received his bachelor’s and master’s degree in chemistry from King Abdulaziz University. He attended the University of Essex on a scholarship, where he received his PhD in physical chemistry in 1986.
Before being appointed as president of King Abdulaziz University in 2016, he served as vice president. He was a... | 0 | Theoretical and Fundamental Chemistry |
William Carl Lineberger (born December 5, 1939-[https://jila.colorado.edu/news-events/news/remembering-jila-fellow-w-carl-lineberger October 17, 2023]) was an American chemist.
A native of Hamlet, North Carolina, William Carl Lineberger was born to parents Caleb Henry and Evelyn Pelot Cooper Lineberger on December 5, 1... | 0 | Theoretical and Fundamental Chemistry |
Sauvagine has been shown to interact with corticotropin releasing factor receptors 1 and 2, and (as with other CRF-related peptides) is also bound by the corticotropin-releasing factor binding protein. | 1 | Applied and Interdisciplinary Chemistry |
CpG islands are commonly 200 to 2000 base pairs long, have a C:G base pair content >50%, and have frequent 5 → 3 CpG sequences. About 70% of human promoters located near the transcription start site of a gene contain a CpG island.
Promoters located at a distance from the transcription start site of a gene also freque... | 1 | Applied and Interdisciplinary Chemistry |
Hand-counting is a cheap and easy to conduct method to estimate the liberation characteristics of a bulk sample wither originating from run-of-mine material, a waste dump or for example exploration trenching. Analysis of particles in the size range 10-100mm has been conducted on a total sample mass of 10 tonnes. By vis... | 0 | Theoretical and Fundamental Chemistry |
The deepest gold mines of the Ancient world were found in the Maski region in Karnataka. There were ancient silver mines in northwest India. Dated to the middle of the 1st millennium BCE. gold and silver were also used for making utensils for the royal family and nobilities.the royal family wore costly fabrics that wer... | 1 | Applied and Interdisciplinary Chemistry |
In granulometry, the particle-size distribution (PSD) of a powder, or granular material, or particles dispersed in fluid, is a list of values or a mathematical function that defines the relative amount, typically by mass, of particles present according to size. Significant energy is usually required to disintegrate soi... | 0 | Theoretical and Fundamental Chemistry |
The ability of pitch to contaminate those in contact with it is mentioned by Dogberry, a character in Shakespeares Much Ado About Nothing', and the same point is made in a speech by Falstaff in Henry IV, Part 1, who refers to "ancient writers" who have made this observation. The Jewish deuterocanonical Book of Sirach s... | 0 | Theoretical and Fundamental Chemistry |
Due to the potential for wear protection at high temperatures beyond which conventional lubricants can be used, possible uses have been speculated in applications such as car engines, power generation and even aerospace, where there is an increasing demand for ever higher efficiency and thus operating temperature. | 1 | Applied and Interdisciplinary Chemistry |
The molecular demon switches mainly between two conformations. The first, or basic state, upon recognizing and binding the ligand or substrate following an induced fit, undergoes a change in conformation which leads to the second quasi-stable state: the protein-ligand complex. In order to reset the protein to its origi... | 0 | Theoretical and Fundamental Chemistry |
The specific speed value for a turbine is the speed of a geometrically similar turbine which would produce unit power (one kilowatt) under unit head (one meter). The specific speed of a turbine is given by the manufacturer (along with other ratings) and will always refer to the point of maximum efficiency. This allows ... | 1 | Applied and Interdisciplinary Chemistry |
Consider the Galvanic cell shown in the adjacent image: it is constructed with a piece of zinc (Zn) submerged in a solution of zinc sulfate () and a piece of copper (Cu) submerged in a solution of copper(II) sulfate (). The overall reaction is:
At the Zn anode, oxidation takes place (the metal loses electrons). This is... | 0 | Theoretical and Fundamental Chemistry |
# Leave out the Bravais lattice type.
# Convert all symmetry elements with translational components into their respective symmetry elements without translation symmetry. (Glide planes are converted into simple mirror planes; screw axes are converted into simple axes of rotation.)
# Axes of rotation, rotoinversion axes,... | 0 | Theoretical and Fundamental Chemistry |
Elly Schwab-Agallidis (born Elly Agallidis, , ; – ) was a Greek physicist/physical chemist and one of the first women in Greece to be awarded a PhD in the field. She was the wife of Georg-Maria Schwab, who met her in Munich as the supervisor of the experimental work for her doctoral thesis; the couple then worked toge... | 0 | Theoretical and Fundamental Chemistry |
Limit rods may be used in an expansion joint design to limit the axial compression or expansion. They allow the expansion joint to move over a range according to where the nut stops are placed along the rods. Limit rods are used to prevent bellows over-extension while restraining the full pressure thrust of the system. | 1 | Applied and Interdisciplinary Chemistry |
Dirubidium has several excited states, and spectral bands occur for transitions between these levels, combined with vibration. It can be studied by its absorption lines, or by laser induced-fluorescence. Laser induced-fluorescence can reveal the life-times of excited states.
In the absorption spectrum of rubidium vapo... | 0 | Theoretical and Fundamental Chemistry |
The metal can be situated in the repeat unit, the core or at the extremities as end-group. Elements often encountered are palladium and platinum. These metals can form octahedral six-coordinate M(IV) linking units from organic dihalides and the corresponding 4-coordinate M(II) monomers. Ferrocene-containing dendrimers ... | 0 | Theoretical and Fundamental Chemistry |
In a GC-O analysis, various methods are used to determine the odour contribution of a compound or the relative importance of each odorant. The methods can be categorised as (i) detection frequency, (ii) dilution to threshold and (iii) direct intensity. | 0 | Theoretical and Fundamental Chemistry |
A fusible alloy is a metal alloy capable of being easily fused, i.e. easily meltable, at relatively low temperatures. Fusible alloys are commonly, but not necessarily, eutectic alloys.
Sometimes the term "fusible alloy" is used to describe alloys with a melting point below . Fusible alloys in this sense are used for so... | 1 | Applied and Interdisciplinary Chemistry |
When quality control of TEMPs is considered, a risk assessment needs to be conducted. A risk is defined as a "potentially unfavourable effect that can be attributed to the clinical use of advanced therapy medicinal products (ATMPs) and is of concern to the patient and/or to other populations (e.g. caregivers and off-sp... | 1 | Applied and Interdisciplinary Chemistry |
The glycine cleavage system (GCS) is also known as the glycine decarboxylase complex or GDC. The system is a series of enzymes that are triggered in response to high concentrations of the amino acid glycine. The same set of enzymes is sometimes referred to as glycine synthase when it runs in the reverse direction to fo... | 1 | Applied and Interdisciplinary Chemistry |
Affinity chromatography is a method of separating a biomolecule from a mixture, based on a highly specific macromolecular binding interaction between the biomolecule and another substance. The specific type of binding interaction depends on the biomolecule of interest; antigen and antibody, enzyme and substrate, recep... | 0 | Theoretical and Fundamental Chemistry |
Three factors define an ideal plasma:
*The plasma approximation: The plasma approximation applies when the plasma parameter Λ, representing the number of charge carriers within the Debye sphere is much higher than unity. It can be readily shown that this criterion is equivalent to smallness of the ratio of the plasma e... | 0 | Theoretical and Fundamental Chemistry |
In organic chemistry, Hückels rule predicts that a planar ring molecule will have aromatic properties if it has 4n + 2 π electrons, where n is a non-negative integer. The quantum mechanical basis for its formulation was first worked out by physical chemist Erich Hückel in 1931. The succinct expression as the 4n' + 2 r... | 0 | Theoretical and Fundamental Chemistry |
* Ciliata: Oxytricha and Stylonychia, Paramecium, Tetrahymena, Oxytrichidae and probably Glaucoma chattoni.
* Dasycladaceae: Acetabularia, and Batophora.
* Diplomonadida: Hexamita inflata, Diplomonadida ATCC50330, and ATCC50380. | 1 | Applied and Interdisciplinary Chemistry |
The formulae for rokushō are not published widely or freely, but passed on in the Japanese craft tradition. However, some scholars have analysed samples of the material.
Premixed rokushō can be purchased outside Japan through specialty jewelry suppliers. Additionally, several different formulas have been proposed to r... | 1 | Applied and Interdisciplinary Chemistry |
In a homogeneous crystalline structure, because of the uniform lattice structure of the metal ions, there is hardly any momentum transfer between the conduction electrons and the metal ions. However, this symmetry does not exist at the grain boundaries and material interfaces, and so here momentum is transferred much m... | 0 | Theoretical and Fundamental Chemistry |
Glugging (also referred to as "the glug-glug process") is the physical phenomenon which occurs when a liquid is poured rapidly from a vessel with a narrow opening, such as a bottle. It is a facet of fluid dynamics.
As liquid is poured from a bottle, the air pressure in the bottle is lowered, and air at higher pressure... | 1 | Applied and Interdisciplinary Chemistry |
** HIBALL study by German and US institutions, Garching uses the high repetition rate of the RF accelerator driver to serve four reactor chambers and first-wall protection using liquid lithium inside the chamber cavity.
** Tore Supra construction starts at Cadarache, France. Its superconducting magnets will permit it t... | 0 | Theoretical and Fundamental Chemistry |
The kiln is usually turned by means of a single Girth Gear surrounding a cooler part of the kiln tube, but sometimes it is turned by driven rollers. The gear is connected through a gear train to a variable-speed electric motor. This must have high starting torque to start the kiln with a large eccentric load. A 6 x ... | 1 | Applied and Interdisciplinary Chemistry |
In fluid dynamics, the Küssner effect describes the unsteady aerodynamic forces on an airfoil or hydrofoil caused by encountering a transverse gust. This is directly related to the Küssner function, used in describing the effect. Both the effect and function are named after Hans Georg Küssner (1900–1984), a German aero... | 1 | Applied and Interdisciplinary Chemistry |
The atoms in the GB are normally in a higher energy state than their equivalent in the bulk material. This is due to their more stretched bonds, which gives rise to a GB tension . This extra energy that the atoms possess is called the grain boundary energy, . The grain will want to minimize this extra energy, thus str... | 1 | Applied and Interdisciplinary Chemistry |
One example of crosstalk between proteins in a signalling pathway can be seen with cyclic adenosine monophosphate's (cAMP) role in regulating cell proliferation by interacting with the mitogen-activated protein (MAP) kinase pathway. cAMP is a compound synthesized in cells by adenylate cyclase in response to a variety o... | 1 | Applied and Interdisciplinary Chemistry |
A special type of bow, called a bulbous bow, is often used on large power vessels to reduce wave-making drag. The bulb alters the waves generated by the hull, by changing the pressure distribution ahead of the bow. Because of the nature of its destructive interference with the bow wave, there is a limited range of ves... | 1 | Applied and Interdisciplinary Chemistry |
For calculations with MEMO, a file must be provided which contains orography height and surface type for each grid location The following surface types are distinguished and must be stored as percentage:
* water (type: 1)
* arid land (type: 2)
* few vegetation (type: 3)
* farmland (type: 4)
* forest (type: 5)
* suburba... | 1 | Applied and Interdisciplinary Chemistry |
Carbon nanotubes are meant to potentially solve the typical tradeoff between the permeability and the selectivity of RO membranes. CNTs present many ideal characteristics including: mechanical strength, electron affinity, and also exhibiting flexibility during modification. By restructuring carbon nanotubes and coating... | 0 | Theoretical and Fundamental Chemistry |
In an octahedral complex, the molecular orbitals created by coordination can be seen as resulting from the donation of two electrons by each of six σ-donor ligands to the d-orbitals on the metal. In octahedral complexes, ligands approach along the x-, y- and z-axes, so their σ-symmetry orbitals form bonding and anti-bo... | 0 | Theoretical and Fundamental Chemistry |
A different type of "blue roof" has been proposed by researchers at the Lawrence Berkeley National Laboratory, who researched a pigment used by the ancient Egyptians known as "Egyptian blue." This color, derived from calcium copper silicate, absorbs visible light, and emits light in the near-infrared range, helping kee... | 1 | Applied and Interdisciplinary Chemistry |
There have been several enantioselective versions of this reaction developed, and even employed in synthesis of complex molecules. Hoyvedas synthesis of (R')-(-)-sporochnol included an asymmetric copper-catalyzed allylic substitution with an organozinc nucleophile and peptide ligand.
A TaniaPHOS ligand, a ferrocenylpho... | 0 | Theoretical and Fundamental Chemistry |
6-Phosphogluconolactone is an intermediate in the pentose phosphate pathway (PPP).
In the PPP pathway, it is produced from glucose-6-phosphate by glucose-6-phosphate dehydrogenase. It is then converted to 6-Phosphogluconic acid by 6-phosphogluconolactonase. | 1 | Applied and Interdisciplinary Chemistry |
* 2021, ACS Carothers Award
* 2019, DuPont Company Lavoisier Medal
* 2018, elected to the National Academy of Engineering
* 2018, named Fellow of the SPIE
* 2016, Perkin Medal, from the Society of Chemical Industry
* 2014, ACS Heroes of Chemistry, from the American Chemical Society (one of thirteen scientists from th... | 0 | Theoretical and Fundamental Chemistry |
Mixture fraction () is a quantity used in combustion studies that measures the mass fraction of one stream (usually the fuel stream) of a mixture formed by two feed streams, one the fuel stream and the other the oxidizer stream. Both the feed streams are allowed to have inert gases. The mixture fraction definition is u... | 1 | Applied and Interdisciplinary Chemistry |
Some types of [http://www.epilepsy.com/ epilepsy] may be brought on due to a splice site mutation.
In addition to a mutation in a stop codon, a splice site mutation on the 3' strand was found in a gene coding for cystatin B in Progressive Myoclonus Epilepsy patients. This combination of mutations was not found in unaf... | 1 | Applied and Interdisciplinary Chemistry |
Some available in situ measurement techniques include:
* Aerosol mass spectrometer (AMS)
* Differential mobility analyzer (DMA)
* Electrical aerosol spectrometer (EAS)
* Aerodynamic particle sizer (APS)
* Aerodynamic aerosol classifier (AAC)
* Wide range particle spectrometer (WPS)
* Micro-Orifice Uniform Deposit Impac... | 0 | Theoretical and Fundamental Chemistry |
The International Palladium Medal was instituted in 1958 and first awarded in 1961. The first recipient was Ernest-John Solvay. The medal has generally been given every two years.
The Société has also been involved in nominating and choosing the recipients of the Othmer Gold Medal and the Winthrop-Sears Medal, which a... | 1 | Applied and Interdisciplinary Chemistry |
This term has become very popular and commonly used in practice. But the appropriate expression is "enantioselective chromatography". Chiral chromatography has advanced to turn into the most preferred technique for the determination of enantiomeric purity as well as separation of pure enantiomers both on analytical an... | 0 | Theoretical and Fundamental Chemistry |
Deprotonation at the α-carbon of an oxazolidinone imide with a strong base such as lithium diisopropylamide selectively furnishes the (Z)-enolate, which can undergo stereoselective alkylation.
Activated electrophiles, such as allylic or benzylic halides, are very good substrates. | 0 | Theoretical and Fundamental Chemistry |
The Hamiltonian structure of surface gravity waves on a potential flow was discovered by Vladimir E. Zakharov in 1968, and rediscovered independently by Bert Broer and John Miles:
where the surface elevation and surface potential — which is the potential at the free surface — are the canonical variables. The Hamilt... | 1 | Applied and Interdisciplinary Chemistry |
Riveting is one of the most ancient metalwork joining processes. Its use declined markedly during the second half of the 20th century, but it still retains important uses in industry and construction, and in artisan crafts such as jewellery, medieval armouring and metal couture in the early 21st century. The earlier us... | 1 | Applied and Interdisciplinary Chemistry |
Bulgarian Professor Petko Dimitrov is the creator of the idea for the application of sapropel sediments from the bottom of the Black Sea as a natural ecological fertilizer and biological products. According to the Romanian tycoon Dinu Patriciu, the sapropel sediments have the potential to be a source of non-conventiona... | 0 | Theoretical and Fundamental Chemistry |
In organic chemistry, hydroamination is the addition of an bond of an amine across a carbon-carbon multiple bond of an alkene, alkyne, diene, or allene. In the ideal case, hydroamination is atom economical and green. Amines are common in fine-chemical, pharmaceutical, and agricultural industries. Hydroamination can be... | 0 | Theoretical and Fundamental Chemistry |
Minimise the lateral pressure of the strings by adjusting the alignment tine bar to avoid the string being cut off. Have ceramic tube place over each aligning tine bar to act as bearing surface for the strings. | 0 | Theoretical and Fundamental Chemistry |
Helium-3 surface spin echo (HeSE) is an inelastic scattering technique in surface science that has been used to measure microscopic dynamics at well-defined surfaces in ultra-high vacuum. The information available from HeSE complements and extends that available from other inelastic scattering techniques such as neutro... | 0 | Theoretical and Fundamental Chemistry |
Certified reference materials (CRMs) are controls or standards used to check the quality and metrological traceability of products, to validate analytical measurement methods, or for the calibration of instruments. A certified reference material is a particular form of measurement standard.
Reference materials are par... | 0 | Theoretical and Fundamental Chemistry |
Pseudin-2 was shown to have potent antibacterial activity, but a lower cytotoxicity. The cytotoxicity of a peptide can be measured by its effect on human erythrocytes. It takes a lower concentration of Pseudin-2 to kill bacteria or fungi such as E. coli, S. aureus, and C. albicans than to kill human erythrocytes. It is... | 1 | Applied and Interdisciplinary Chemistry |
Yonekura shows the steel industry was central to the economic development of Japan. The nation's sudden transformation from feudal to modern society in the late nineteenth century, its heavy industrialization and imperialist war ventures in 1900–1945, and the post-World War II high-economic growth, all depended on iron... | 1 | Applied and Interdisciplinary Chemistry |
It is common for two monochromators to be connected in series, with their mechanical systems operating in tandem so that they both select the same color. This arrangement is not intended to improve the narrowness of the spectrum, but rather to lower the cutoff level. A double monochromator may have a cutoff about one m... | 0 | Theoretical and Fundamental Chemistry |
* The CAS database is the most comprehensive repository for data on organic compounds. The search tool SciFinder is offered.
* The Beilstein database contains information on 9.8 million substances, covers the scientific literature from 1771 to the present, and is today accessible via Reaxys. Structures and a large dive... | 0 | Theoretical and Fundamental Chemistry |
Radiopharmacology is radiochemistry applied to medicine and thus the pharmacology of radiopharmaceuticals (medicinal radiocompounds, that is, pharmaceutical drugs that are radioactive). Radiopharmaceuticals are used in the field of nuclear medicine as radioactive tracers in medical imaging and in therapy for many disea... | 1 | Applied and Interdisciplinary Chemistry |
The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time. Reaction rates can vary dramatically. For example, the oxidative rus... | 0 | Theoretical and Fundamental Chemistry |
Since its original description in 1992, the CSI method has been used to characterize the secondary structure of thousands of peptides and proteins. Its popularity is largely due to the fact that it is easy to understand and can be implemented without the need for specialized computer programs. Even though the CSI met... | 0 | Theoretical and Fundamental Chemistry |
Calcein, also known as fluorexon, fluorescein complex, is a fluorescent dye with excitation and emission wavelengths of 495 and 515 nm, respectively, and has the appearance of orange crystals. Calcein self-quenches at concentrations above 70 mM and is commonly used as an indicator of lipid vesicle leakage. It has also ... | 0 | Theoretical and Fundamental Chemistry |
* Polyhydroxoalkanoates and polyesters obtained by enzyme-assisted esterification using lipases.<nowiki/>
* Heparin, heparan sulfate and other glycosaminoglycans and plant glycans.
*Polysaccharides such as cellulose, amylose, chitin and derivatives
*Natural and non-natural polynucleotides can be successfully obtained ... | 1 | Applied and Interdisciplinary Chemistry |
For an adsorption column, the column resin (the stationary phase) is composed of microbeads. Even smaller particles such as proteins, carbohydrates, metal ions, or other chemical compounds are conjugated onto the microbeads. Each binding particle that is attached to the microbead can be assumed to bind in a 1:1 ratio w... | 0 | Theoretical and Fundamental Chemistry |
We have to distinguish between line source AAS (LS AAS) and continuum source AAS (CS AAS). In classical LS AAS, as it has been proposed by Alan Walsh, the high spectral resolution required for AAS measurements is provided by the radiation source itself that emits the spectrum of the analyte in the form of lines that ar... | 0 | Theoretical and Fundamental Chemistry |
As a β-lactam antibiotic, piperacillin inhibits penicillin-binding proteins, preventing the spread of bacteria and infections. Responsible for catalyzing the cross-linkage between peptidoglycan strands that protect the bacterial cell from osmotic rupture, penicillin-binding proteins are unique to bacterial organisms, w... | 0 | Theoretical and Fundamental Chemistry |
Ertl was born in Stuttgart, Germany, where he studied physics from 1955 to 1957 at the Technical University of Stuttgart and then at the University of Paris (1957–1958) and Ludwig Maximilian University in Munich (1958–1959). He completed his Diplom in Physics at the Technical University of Stuttgart in 1961, followed h... | 0 | Theoretical and Fundamental Chemistry |
Electron transfer (ET) occurs when an electron relocates from an atom or molecule to another such chemical entity. ET is a mechanistic description of certain kinds of redox reactions involving transfer of electrons.
Electrochemical processes are ET reactions. ET reactions are relevant to photosynthesis and respiration... | 0 | Theoretical and Fundamental Chemistry |
Mitigation of adverse impacts of runoff can take several forms:
* Land use development controls aimed at minimizing impervious surfaces in urban areas
* Erosion controls for farms and construction sites
* Flood control and retrofit programs, such as green infrastructure
* Chemical use and handling controls in agricult... | 1 | Applied and Interdisciplinary Chemistry |
The Stuart number (N), also known as magnetic interaction parameter, is a dimensionless number of fluids, i.e. gases or liquids.
It is defined as the ratio of electromagnetic to inertial forces, which gives an estimate of the relative importance of a magnetic field on a flow. The Stuart number is relevant for flows of ... | 1 | Applied and Interdisciplinary Chemistry |
In humans, 5ALA is a precursor to heme. Biosynthesized, 5ALA goes through a series of transformations in the cytosol and finally gets converted to Protoporphyrin IX inside the mitochondria. This protoporphyrin molecule chelates with iron in presence of enzyme ferrochelatase to produce Heme.
Heme increases the mitochond... | 1 | Applied and Interdisciplinary Chemistry |
Studies of United States sewage in the late 1960s estimated mean per capita contributions of in urine and feces, in synthetic detergents, and lesser variable amounts used as corrosion and scale control chemicals in water supplies. Source control via alternative detergent formulations has subsequently reduced the larg... | 1 | Applied and Interdisciplinary Chemistry |
* 1802 – Joseph Louis Gay-Lussac publishes Charless law, discovered (but unpublished) by Jacques Charles around 1787; this shows the dependency between temperature and volume. Gay-Lussac also formulates the law relating temperature with pressure (the pressure law, or Gay-Lussacs law)
* 1804 – Sir John Leslie observes t... | 0 | Theoretical and Fundamental Chemistry |
A typical LFER relation for predicting the equilibrium concentration of a compound or solute in the vapor phase to a condensed (or solvent) phase can be defined as follows (following M.H. Abraham and co-workers):
where is some free-energy related property, such as an adsorption or absorption constant, , anesthetic pot... | 0 | Theoretical and Fundamental Chemistry |
Macromolecules is a peer-reviewed scientific journal that has been published since 1968 by the American Chemical Society. Initially published bimonthly, it became monthly in 1983 and then, in 1990, biweekly. Macromolecules is abstracted and indexed in Scopus, EBSCOhost, PubMed, Web of Science, and SwetsWise. The editor... | 0 | Theoretical and Fundamental Chemistry |
A selectable marker is carried by the vector to allow the selection of positively transformed cells. Antibiotic resistance is often used as marker, an example being the beta-lactamase gene, which confers resistance to the penicillin group of beta-lactam antibiotics like ampicillin. Some vectors contain two selectabl... | 1 | Applied and Interdisciplinary Chemistry |
*George Washington Carver's research in new agricultural products, crop rotation, and soil fertility at Tuskegee University between 1896 and 1943
*Isolation of antibiotics, including streptomycin (in 1943), by Selman Waksman at Rutgers University Cook Campus
*Columbia Dry Cell, the first sealed dry cell battery success... | 1 | Applied and Interdisciplinary Chemistry |
The adsorption of ensemble molecules on a surface or interface can be divided into two processes: adsorption and desorption. If the adsorption rate wins the desorption rate, the molecules will accumulate over time giving the adsorption curve over time. If the desorption rate is larger, the number of molecules on the su... | 0 | Theoretical and Fundamental Chemistry |
Perindopril is a medication used to treat high blood pressure, heart failure, or stable coronary artery disease.
As a long-acting ACE inhibitor, it works by relaxing blood vessels and decreasing blood volume. As a prodrug, perindopril is hydrolyzed in the liver to its active metabolite, perindoprilat. It was patented ... | 0 | Theoretical and Fundamental Chemistry |
Maria Salomea Skłodowska-Curie (; ; 7 November 1867 – 4 July 1934), known simply as Marie Curie ( , ), was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity. She was the first woman to win a Nobel Prize, the first person to win a Nobel Prize twice, and the only per... | 0 | Theoretical and Fundamental Chemistry |
Environmental water quality, also called ambient water quality, relates to water bodies such as lakes, rivers, and oceans. Water quality standards for surface waters vary significantly due to different environmental conditions, ecosystems, and intended human uses. Toxic substances and high populations of certain microo... | 0 | Theoretical and Fundamental Chemistry |
Emulsifying agents are effective at extinguishing fires on small, thin-layer spills of flammable liquids (class B fires). Such agents encapsulate the fuel in a fuel-water emulsion, thereby trapping the flammable vapors in the water phase. This emulsion is achieved by applying an aqueous surfactant solution to the fuel ... | 0 | Theoretical and Fundamental Chemistry |
Cosmogenic isotopes (or cosmogenic nuclides) are rare isotopes created when a high-energy cosmic ray interacts with the nucleus of an in situ atom. These isotopes are produced within earth materials such as rocks or soil, in Earth's atmosphere, and in extraterrestrial items such as meteorites. By measuring cosmogenic... | 0 | Theoretical and Fundamental Chemistry |
Each action potential is followed by a refractory period, which can be divided into an absolute refractory period, during which it is impossible to evoke another action potential, and then a relative refractory period, during which a stronger-than-usual stimulus is required. These two refractory periods are caused by c... | 0 | Theoretical and Fundamental Chemistry |
Chimpanzee age impacts the frequency of alarm signalling. Chimpanzees over 80 months of age are more likely to produce an alarm call than those less than 80 months of age. There are several hypotheses for this lack of alarm calling in infants zero to four years of age. The first hypothesis is a lack of motivation to pr... | 1 | Applied and Interdisciplinary Chemistry |
Another application for duplex sequencing is in the detection of DNA/RNA copy numbers by estimating the relative frequency of variants. A method for counting PCR template molecules with application to next-generation sequencing is an example. | 1 | Applied and Interdisciplinary Chemistry |
RHEED is an extremely popular technique for monitoring the growth of thin films. In particular, RHEED is well suited for use with molecular beam epitaxy (MBE), a process used to form high quality, ultrapure thin films under ultrahigh vacuum growth conditions. The intensities of individual spots on the RHEED pattern flu... | 0 | Theoretical and Fundamental Chemistry |
Whiskers can cause short circuits and arcing in electrical equipment. The phenomenon was discovered by telephone companies in the late 1940s and it was later found that the addition of lead to tin solder provided mitigation. The European Restriction of Hazardous Substances Directive (RoHS), which took effect on July 1... | 1 | Applied and Interdisciplinary Chemistry |
Mg(I) dimers have also been researched for carbon monoxide, CO, activation. Further research regarding the synthesis of these complexes revealed that their behavior can be compared to low-valent f-blocks compounds concerning the reduction of CO, socyanides, and nitriles.
Computational studies carried out further reinfo... | 0 | Theoretical and Fundamental Chemistry |
Chen (2006) has located the origin of the statement of maximum power as a formal principle in a tentative proposal by Alfred J. Lotka (1922a, b). Lotkas statement sought to explain the Darwinian notion of evolution with reference to a physical principle. Lotkas work was subsequently developed by the systems ecologist H... | 0 | Theoretical and Fundamental Chemistry |
In eukaryotes, a corepressor is a protein that binds to transcription factors. In the absence of corepressors and in the presence of coactivators, transcription factors upregulate gene expression. Coactivators and corepressors compete for the same binding sites on transcription factors. A second mechanism by which cor... | 1 | Applied and Interdisciplinary Chemistry |
Example values of activity coefficients of sodium chloride in aqueous solution are given in the table. In an ideal solution, these values would all be unity. The deviations tend to become larger with increasing molality and temperature, but with some exceptions. | 0 | Theoretical and Fundamental Chemistry |
Gerel Ochir was born in Moscow on 17 July 1941. She gained an interest in geology at the age of 10 after her mother gave her a book on geology by Russian geochemist Alexander Fersman. She graduated from secondary school in Ulaanbaatar in 1958.
From 1959, Ochir attended Charles University in Prague. She earned a bachelo... | 0 | Theoretical and Fundamental Chemistry |
https://web.archive.org/web/20160325004825/https://www.colorado.edu/physics/phys7550/phys7550_sp07/extras/Ramsey90_RMP.pdf | 0 | Theoretical and Fundamental Chemistry |
In quantum chemistry, the Dunham expansion is an expression for the rotational-vibrational energy levels of a diatomic molecule:
where and are the vibrational and rotational quantum numbers, and is the projection of along the internuclear axis in the body-fixed frame.
The constant coefficients are called Dunham pa... | 0 | Theoretical and Fundamental Chemistry |
Heinz Falk studied chemistry at the University of Vienna starting in 1959 and completed his dissertation under his doctoral advisor, Karl Schlögl, in 1966. In 1971 Falk spent a year abroad to study at ETH Zürich. Upon his return to Vienna in 1972 he attained habilitation for organic chemistry at the University of Vienn... | 0 | Theoretical and Fundamental Chemistry |
Histamine N-methyltransferase (HNMT) is a protein encoded by the HNMT gene in humans. It belongs to the methyltransferases superfamily of enzymes and plays a crucial role in the inactivation of histamine, a biomolecule that is involved in various physiological processes. Methyltransferases are present in every life for... | 1 | Applied and Interdisciplinary Chemistry |
In the case of bacteria, transposition mutagenesis is usually accomplished by way of a plasmid from which a transposon is extracted and inserted into the host chromosome. This usually requires a set of enzymes including transposase to be translated. The transposase can be expressed either on a separate plasmid, or on t... | 1 | Applied and Interdisciplinary Chemistry |
The tensile strength of a material quantifies how much elongating stress the material will endure before failure. This is very important in applications that rely upon a polymer's physical strength or durability. For example, a rubber band with a higher tensile strength will hold a greater weight before snapping. In ge... | 0 | Theoretical and Fundamental Chemistry |
The molecular formula BaSO (molar mass: 233.39 g/mol, exact mass: 233.8570 u) may refer to:
*Barium sulfate
*Baryte (or barite), a mineral made of barium sulfate | 0 | Theoretical and Fundamental Chemistry |
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