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To determine the fundamental model for any process, the inputs and outputs of the system are defined differently than for other chemical processes. The balance equations are defined by the control inputs and outputs rather than the material inputs. The control model is a set of equations used to predict the behavior of...
1
Applied and Interdisciplinary Chemistry
Nitrogen assimilation is the formation of organic nitrogen compounds like amino acids from inorganic nitrogen compounds present in the environment. Organisms like plants, fungi and certain bacteria that can fix nitrogen gas (N) depend on the ability to assimilate nitrate or ammonia for their needs. Other organisms, li...
1
Applied and Interdisciplinary Chemistry
There are no general solutions to the general dynamic equation (GDE); common methods used to solve the general dynamic equation include: * Moment method * Modal/sectional method, and * Quadrature method of moments/Taylor-series expansion method of moments, and * Monte Carlo method.
0
Theoretical and Fundamental Chemistry
2,6-Di-tert-butylpyridine is prepared by the reaction of tert-butyllithium with pyridine. The synthesis is reminiscent of the Chichibabin reaction. Some related bulky pyridine compounds have been described, including 2,4,6-tri-t-butylpyridine and 2,6-di-tert-butyl-4-methylpyridine.
0
Theoretical and Fundamental Chemistry
Shaw was born on 28 March 1930 in Springhead (then in the West Riding of Yorkshire). His parents were Tom and Vera Shaw. He was educated at Hulme Grammar School in Oldham. Shaw married Mary Elizabeth Neild in 1951.
0
Theoretical and Fundamental Chemistry
Phosphagens, also known as macroergic compounds, are high energy storage compounds, also known as high-energy phosphate compounds, chiefly found in muscular tissue in animals. They allow a high-energy phosphate pool to be maintained in a concentration range, which, if it all were adenosine triphosphate (ATP), would cre...
1
Applied and Interdisciplinary Chemistry
In 1947 the couple departed Australia on the Stratheden, and from September lived in Mt. Pleasant Rd., Cambridge while McTaggart worked with inorganic chemist Harry Julius Emeléus laboratory in Downing Street. He resumed his amateur radio operation with callsign G3CUA. In 1948 he worked in Paris with Yvette Cauchois o...
0
Theoretical and Fundamental Chemistry
The mathematical models that describe chemical reaction kinetics provide chemists and chemical engineers with tools to better understand and describe chemical processes such as food decomposition, microorganism growth, stratospheric ozone decomposition, and the chemistry of biological systems. These models can also be ...
0
Theoretical and Fundamental Chemistry
Vancomycin is indicated for the treatment of serious, life-threatening infections by Gram-positive (aerobic and/or anaerobic) bacteria unresponsive to other antibiotics. The increasing emergence of vancomycin-resistant enterococci has resulted in the development of guidelines for use by the Centers for Disease Control ...
0
Theoretical and Fundamental Chemistry
He Jiankui, the researcher, took sperm and eggs from the couples, performed in vitro fertilisation with the eggs and sperm, and then edited the genomes of the embryos using CRISPR/Cas9. The editing targeted a gene, CCR5, that codes for a protein that HIV uses to enter cells. He was trying to reproduce the phenotype of ...
1
Applied and Interdisciplinary Chemistry
The preparation of certified reference materials is described in general in ISO Guide 17034 and in more detail in ISO Guide 35. Preparation of biological reference standards is described in WHO Guidance. General steps required in production of a certified reference material typically include: * Collection or synthesis ...
0
Theoretical and Fundamental Chemistry
Imine formation is an important reaction. Primary amines react with ketones and aldehydes to form imines. In the case of formaldehyde (R' H), these products typically exist as cyclic trimers. Reduction of these imines gives secondary amines: Similarly, secondary amines react with ketones and aldehydes to form enamines...
0
Theoretical and Fundamental Chemistry
The Gibbs–Donnan effect (also known as the Donnan's effect, Donnan law, Donnan equilibrium, or Gibbs–Donnan equilibrium) is a name for the behaviour of charged particles near a semi-permeable membrane that sometimes fail to distribute evenly across the two sides of the membrane. The usual cause is the presence of a di...
0
Theoretical and Fundamental Chemistry
Though often placed at the top of the alkali metal column in the periodic table, hydrogen does not, under ordinary conditions, exhibit the properties of an alkali metal. Instead, it forms diatomic molecules, similar to halogens and some nonmetals in the second period of the periodic table, such as nitrogen and oxygen....
0
Theoretical and Fundamental Chemistry
Since 1980 two theories were worked on to explain adsorption and obtain equations that work. These two are referred to as the chi hypothesis, the quantum mechanical derivation, and excess surface work, ESW. Both these theories yield the same equation for flat surfaces: Where U is the unit step function. The definiti...
0
Theoretical and Fundamental Chemistry
In organic chemistry, the vanillyl group (also known as vanilloyl) is a functional group. Compounds containing a vanillyl group are called vanilloids, and include vanillin, vanillic acid, capsaicin, vanillylmandelic acid, etc.
0
Theoretical and Fundamental Chemistry
Periodic ordered lattices behave as linear viscoelastic solids when subjected to small amplitude mechanical deformations. Okano's group experimentally correlated the shear modulus to the frequency of standing shear modes using mechanical resonance techniques in the ultrasonic range (40 to 70 kHz). In oscillatory exper...
0
Theoretical and Fundamental Chemistry
The English word "chitin" comes from the French word chitine, which was derived in 1821 from the Greek word χιτών (khitōn) meaning covering. A similar word, "chiton", refers to a marine animal with a protective shell.
1
Applied and Interdisciplinary Chemistry
A protein-based chiral stationary phase is based on silica-gel, on which a protein is immobilized or bonded. The protein is based on many chiral centers, therefore the mechanism of chiral interaction between the protein and the analytes involves many interactions, such as hydrophobic and electrostatic interactions, hyd...
0
Theoretical and Fundamental Chemistry
Methylene (IUPAC name: Methylidene, also called carbene or methene) is an organic compound with the chemical formula (also written ). It is a colourless gas that fluoresces in the mid-infrared range, and only persists in dilution, or as an adduct. Methylene is the simplest carbene. It is usually detected only at very ...
0
Theoretical and Fundamental Chemistry
Herman Thompson Briscoe (November 6, 1893 – October 8, 1960) was an American chemist and professor of chemistry. The Herman T. Briscoe Professorship in Chemistry at Indiana University was established in 1961, and the Herman T. Briscoe Quadrangle Dormitory was dedicated in 1966.
0
Theoretical and Fundamental Chemistry
Ibuprofen was made available by prescription in the United Kingdom in 1969 and in the United States in 1974. Ibuprofen is the International nonproprietary name (INN), British Approved Name (BAN), Australian Approved Name (AAN) and United States Adopted Name (USAN). In the United States, it has been sold under the brand...
0
Theoretical and Fundamental Chemistry
Topological ideas are relevant to fluid dynamics (including magnetohydrodynamics) at the kinematic level, since any fluid flow involves continuous deformation of any transported scalar or vector field. Problems of stirring and mixing are particularly susceptible to topological techniques. Thus, for example, the Thurst...
1
Applied and Interdisciplinary Chemistry
One of the more classic applications of DKR is Noyori's asymmetric hydrogenation. The presence of an acidic center between two carbonyl groups allows for easy epimerization at the chiral center under basic conditions. To select for one of the four possible stereoisomers, a BINAP-Ru catalyst is used to control the outc...
0
Theoretical and Fundamental Chemistry
For a simple volume with two openings, the cross wind flow rate can be calculated using the following equation: where is the far-field wind speed; is a local pressure drag coefficient for the building, defined at the location of the upstream opening; is a local pressure drag coefficient for the building, defined at ...
1
Applied and Interdisciplinary Chemistry
TRANSDIP, based on a α-cyclodextrin, is the first ligand to give exclusively trans-spanned complexes, even with d metal ion halides. Xantphos is sometimes classified as a trans-spanning ligand, with less steric bulk compared to TRANSPHOS. SPANphos is comparable to XANTPHOS but more reliably trans-spanning.
0
Theoretical and Fundamental Chemistry
The Manhès–David process is a refining process of the copper mattes, invented in 1880 by the French industrialist Pierre Manhès and his engineer . Inspired by the Bessemer process, it consists of the use of a converter to oxidise with air the undesirable chemical elements (mainly iron and sulfur) contained in the matte...
1
Applied and Interdisciplinary Chemistry
Lysine is synthesized from aspartate via the diaminopimelate (DAP) pathway. The initial two stages of the DAP pathway are catalyzed by aspartokinase and aspartate semialdehyde dehydrogenase. These enzymes play a key role in the biosynthesis of lysine, threonine, and methionine. There are two bifunctional aspartokinase/...
1
Applied and Interdisciplinary Chemistry
A vortex line or vorticity line is a line which is everywhere tangent to the local vorticity vector. Vortex lines are defined by the relation where is the vorticity vector in Cartesian coordinates. A vortex tube is the surface in the continuum formed by all vortex lines passing through a given (reducible) closed curve...
1
Applied and Interdisciplinary Chemistry
RNA splicing errors have been estimated to occur in a third of genetic diseases. To understand pathogenesis and identify potential targets of therapeutic intervention in these diseases, explicating the splicing elements involved is essential. Determining the complete set of components involved in splicing presents many...
1
Applied and Interdisciplinary Chemistry
The usual process of electrorefining copper consists of placing a copper anode (about 99.5–99.7% pure copper) in sulfuric acid (HSO) bath of copper electrolyte, together with a cathode, and passing a current between the anode and cathode through an external circuit. At the applied electropotential, copper and less nobl...
1
Applied and Interdisciplinary Chemistry
It was previously thought that it was the relatively small RNA polymerase that moves along the comparatively larger DNA template during transcription. However, increasing evidence supports the notion that due to the tethering of a transcription factory to the nuclear matrix, it is in fact the large DNA template that is...
1
Applied and Interdisciplinary Chemistry
Ribosomal RNA (rRNA) includes non-coding RNAs that play essential roles in rRNA regulation. Ribosomal RNA (rRNA) takes part in protein synthesis. Occasional RNA molecules act catalytically, as RNA enzymes (ribozymes) or take part in protein export. The most important ribozyme is the major rRNA of the large subunit of t...
1
Applied and Interdisciplinary Chemistry
The suction specific speed is mainly used to see if there will be problems with cavitation during the pumps operation on the suction side. It is defined by centrifugal and axial pumps inherent physical characteristics and operating point. The suction specific speed of a pump will define the range of operation in which ...
1
Applied and Interdisciplinary Chemistry
To explain each part of the terminology, "scattering" refers to the deflection of leptons' (electron, muon, etc.) off of hadrons. Measuring the angles of deflection gives information about the nature of the process. "Inelastic" means that the target absorbs some kinetic energy. In fact, at the very high energies of lep...
0
Theoretical and Fundamental Chemistry
A uniform polymer (often referred to as a monodisperse polymer) is composed of molecules of the same mass. Nearly all natural polymers are uniform. Synthetic near-uniform polymer chains can be made by processes such as anionic polymerization, a method using an anionic catalyst to produce chains that are similar in leng...
0
Theoretical and Fundamental Chemistry
In organic synthesis, VCl is used for the oxidative coupling of phenols. For example, it converts phenol into a mixture of 4,4-, 2,4-, and 2,2'-biphenols: :2 CHOH + 2 VCl → HOCH–CHOH + 2 VCl + 2 HCl
0
Theoretical and Fundamental Chemistry
Tributyltin azide is synthesized by the salt metathesis reaction of tributyltin chloride and sodium azide. It is a reagent used in the synthesis of tetrazoles, which in turn are used to generate angiotensin II receptor antagonists. In some applications, tributyltin azide has been replaced by the less toxic trioctyltin...
0
Theoretical and Fundamental Chemistry
The database content can be viewed in self-contained, pre-defined pathways. The database can also dynamically generate interaction networks to visualize the results of database searches. Pathways and dynamically generated networks are displayed in GIF and SVG images and can be downloaded as XML (including the standard ...
1
Applied and Interdisciplinary Chemistry
The basic term is often prefixed to define the actual purpose of the ladle. The basic ladle design can therefore include many variations that improve the usage of the ladle for specific tasks. For example: * Casting ladle: a ladle used to pour molten metal into moulds to produce the casting. * Transfer ladle: a ladle u...
1
Applied and Interdisciplinary Chemistry
Differential thermal analysis (DTA) is a thermoanalytic technique that is similar to differential scanning calorimetry. In DTA, the material under study and an inert reference are made to undergo identical thermal cycles, (i.e., same cooling or heating programme) while recording any temperature difference between sampl...
0
Theoretical and Fundamental Chemistry
*Thermal radiation emitted by a body at any temperature consists of a wide range of frequencies. The frequency distribution is given by Planck's law of black-body radiation for an idealized emitter as shown in the diagram at top. *The dominant frequency (or color) range of the emitted radiation shifts to higher frequen...
0
Theoretical and Fundamental Chemistry
If one monomer is present in stoichiometric excess, then the equation becomes :* r is the stoichiometric ratio of reactants, the excess reactant is conventionally the denominator so that r < 1. If neither monomer is in excess, then r = 1 and the equation reduces to the equimolar case above. The effect of the excess rea...
0
Theoretical and Fundamental Chemistry
Pentanoyl chloride is an acyl chloride derived from pentanoic acid. It is a colorless liquid that is used to attach the valeroyl group. It is usually produced by chlorination of valeric acid.
0
Theoretical and Fundamental Chemistry
The same team was also involved in the claimed discovery of technetium. They reported the discovery of element 75 and element 43 in 1925 and named element 43 masurium (after Masuria in eastern Prussia, now in Poland, the region where Walter Noddacks family originated). The group bombarded columbite with a beam of ele...
1
Applied and Interdisciplinary Chemistry
Benzeneselenol, also known as selenophenol, is the organoselenium compound with the chemical formula , often abbreviated PhSeH. It is the selenium analog of phenol. This colourless, malodorous compound is a reagent in organic synthesis.
0
Theoretical and Fundamental Chemistry
The unique metabolism of acetogens has significant applications in biotechnology. In carbohydrate fermentations, the decarboxylation reactions end up in the conversion of organic carbon into carbon dioxide, the main greenhouse gas. This release is no longer compatible with the need to minimize the world CO emissions. I...
1
Applied and Interdisciplinary Chemistry
*First Prize – "Kisahmu Belum Berakhir" (song: music and lyrics) for Pertandingan Mencipta Lagu Patriotik Alaf Baru, by International College of Music Malaysia, 2001 *Mandarin Oriental Fan of the Arts Most Promising Artist Award, 2nd BOH Cameronian Arts Awards, 2003 *Best Male Vocal in an Album, for Dilanda Cinta, 13th...
1
Applied and Interdisciplinary Chemistry
The symptoms of palytoxin poisoning and how quickly they appear depend partially on how much and through what route one has been exposed, e.g. if the poison has been inhaled or if the exposure has happened via skin. In some non-lethal cases the symptoms in people have appeared in 6–8 hours after inhalation or skin expo...
0
Theoretical and Fundamental Chemistry
Tengiz Beridze (Georgian: თენგიზ გიორგის ძე ბერიძე) is a Georgian biochemist. He was born on 26 October 1939 in Tbilisi, Georgian SSR, USSR.
1
Applied and Interdisciplinary Chemistry
Besides involvement in the infection process, viral replicase is a directly necessary part of the packaging of RNA viruses' genetic material. This was expected due to replicase involvement already being confirmed in various other viruses.
1
Applied and Interdisciplinary Chemistry
Using the Coriolis effect that causes a laterally vibrating tube to distort, a direct measurement of mass flow can be obtained in a coriolis flowmeter. Furthermore, a direct measure of the density of the fluid is obtained. Coriolis measurement can be very accurate irrespective of the type of gas or liquid that is measu...
1
Applied and Interdisciplinary Chemistry
The equation is derived by solving a linearized version of the Navier–Stokes equation, in presence of gravity and a mean density gradient (with gradient-length ), for the perturbation velocity field where is the unperturbed or basic flow. The perturbation velocity has the wave-like solution (real part understood). ...
1
Applied and Interdisciplinary Chemistry
Colletto et al. developed a regioselective -arylation of benzo[b]thiophenes at room temperature with aryl iodides as coupling partners and sought to understand the mechanism of this reaction by performing natural abundance kinetic isotope effect measurements via single pulse NMR. The observation of a primary C isotope ...
0
Theoretical and Fundamental Chemistry
If the synthesized molecules of a combinatorial library are cleaved from the solid support a soluble mixture forms. In such solution, millions of different compounds may be found. When this synthetic method was developed, it first seemed impossible to identify the molecules, and to find molecules with useful properties...
1
Applied and Interdisciplinary Chemistry
Foraminifera shells are composed of calcium carbonate (CaCO) and are found in many common geological environments. The ratio of O to O in the shell is used to indirectly determine the temperature of the surrounding water at the time the shell was formed. The ratio varies slightly depending on the temperature of the sur...
0
Theoretical and Fundamental Chemistry
As mentioned before, N-acyl-homoserine lactones (AHL) are the quorum sensing signaling molecules of the gram-negative bacteria. However, these molecules may have different functional groups on their acyl chain, and also a different length of acyl chain. Therefore, there exist many different AHL signaling molecules, for...
1
Applied and Interdisciplinary Chemistry
*FasR: The Fas receptor (FasR), or CD95, is the most intensely studied member of the death receptor family. The gene is situated on chromosome 10 in humans and 19 in mice. Previous reports have identified as many as eight splice variants, which are translated into seven isoforms of the protein. Many of these isoforms...
1
Applied and Interdisciplinary Chemistry
Perrin estimated the Avogadro number by a variety of methods, at the turn of the 20th century. He was awarded the 1926 Nobel Prize in Physics, largely for this work.
0
Theoretical and Fundamental Chemistry
One of the first European initiatives in cleaner production was started in Austria in 1992 by the BMVIT (Bundesministerium für Verkehr, Innovation und Technologie). This resulted in two initiatives: "Prepare" and EcoProfit. The "PIUS" initiative was founded in Germany in 1999. Since 1994, the United Nations Industrial ...
1
Applied and Interdisciplinary Chemistry
Unique VUV absorbance spectra not only enable unambiguous compound identification, and allows GC run times to be deliberately shortened. VUV detectors operate at ambient pressure and are thus not flow rate limited. GC run times can be reduced by increasing the GC column flow and oven temperature program rates. Flow rat...
0
Theoretical and Fundamental Chemistry
Bis(trimethylsilyl)acetamide (BSA) is an organosilicon compound with the formula (Me = CH). It is a colorless liquid that is soluble in diverse organic solvents, but reacts rapidly with moisture and solvents containing OH and NH groups. It is used in analytical chemistry to increase the volatility of analytes, e.g....
0
Theoretical and Fundamental Chemistry
A dearomatization reaction is an organic reaction in which the reactants are arenes and the products permanently lose their aromaticity. It is of some importance in synthetic organic chemistry for the organic synthesis of new building blocks and in total synthesis. Types of carbocyclic arene dearomization include hydr...
0
Theoretical and Fundamental Chemistry
* Chemistry * Chemical technology * Biotechnology * Material Science and Technology of Materials * Standardization and Certification * Technosphere Safety * Applied Informatics * Applied mathematics * Management
1
Applied and Interdisciplinary Chemistry
The Ramsey Group at the University of Chapel Hill is interested in utilizing micro- and nano fabrication strategies to create devices that facilitate people's ability to gather chemical and biochemical information. Their motivations for fabricating devices include clinical diagnostics, high-throughput biochemical exper...
0
Theoretical and Fundamental Chemistry
Klein et al. computationally analyzed the electronic structure of a high valent Nickel complex "1". This complex was previously reported to readily undergo aryl-CF bond-forming reductive elimination. Klein et al. reported that this formally Ni(IV) complex is best described as Ni approaching the +II oxidation state. The...
0
Theoretical and Fundamental Chemistry
Inverted sugar syrup for fermented water is usually home-made by fully dissolving sugar in cold tap water. Yeast requires oxygen rich water that do not exceed 25 degrees Celsius. A common manual way to dissolve refined sugar is to mix with water in a container which is half filled, and then sealed and shaken. However, ...
1
Applied and Interdisciplinary Chemistry
In general, action potentials that reach the synaptic knobs cause a neurotransmitter to be released into the synaptic cleft. Neurotransmitters are small molecules that may open ion channels in the postsynaptic cell; most axons have the same neurotransmitter at all of their termini. The arrival of the action potential o...
0
Theoretical and Fundamental Chemistry
When monomers with two types of functional groups A and B undergo step growth polymerisation by virtue of a reaction between A and B groups, a similar analytical results are known. See the table on the right for several examples. In this case, is the fraction of initial monomers with groups A and groups B. Suppose t...
0
Theoretical and Fundamental Chemistry
In simple terms, phosphorescence is a process in which energy absorbed by a substance is released relatively slowly in the form of light. This is in some cases the mechanism used for glow-in-the-dark materials which are "charged" by exposure to light. Unlike the relatively swift reactions in fluorescence, such as those...
0
Theoretical and Fundamental Chemistry
Prout's hypothesis was an early 19th-century attempt to explain the existence of the various chemical elements through a hypothesis regarding the internal structure of the atom. In 1815 and 1816, the English chemist William Prout published two papers in which he observed that the atomic weights that had been measured ...
1
Applied and Interdisciplinary Chemistry
The Casein kinase 1 family () of protein kinases are serine/threonine-selective enzymes that function as regulators of signal transduction pathways in most eukaryotic cell types. CK1 isoforms are involved in Wnt signaling, circadian rhythms, nucleo-cytoplasmic shuttling of transcription factors, DNA repair, and DNA tra...
1
Applied and Interdisciplinary Chemistry
Pressure (along with temperature) determines the super- or subcritical state of solvents as well as overall reaction kinetics and the energy inputs required to yield the desirable HTL products (oil, gas, chemicals, char etc.).
0
Theoretical and Fundamental Chemistry
Identification, sampling and analysis of acid sulfate soils should be conducted in line with: * the National acid sulfate soils sampling and identification methods manual; * the National acid sulfate soils identification and laboratory methods manual; and * the National Environment Protection (Assessment of Site Cont...
0
Theoretical and Fundamental Chemistry
The word transcriptome is a portmanteau of the words transcript and genome. It appeared along with other neologisms formed using the suffixes -ome and -omics to denote all studies conducted on a genome-wide scale in the fields of life sciences and technology. As such, transcriptome and transcriptomics were one of the f...
1
Applied and Interdisciplinary Chemistry
The above-described process with the capture of two electrons and emission of two neutrinos (two-neutrino double electron capture) is allowed by the Standard Model of particle physics: No conservation laws (including lepton number conservation) are violated. However, if the lepton number is not conserved, or equivalent...
0
Theoretical and Fundamental Chemistry
One katal refers to an amount of enzyme that gives a catalysed rate of conversion of one mole per second. Because this is such a large unit for most enzymatic reactions, the nanokatal (nkat) is used in practice. The katal is not used to express the rate of a reaction; that is expressed in units of concentration per sec...
0
Theoretical and Fundamental Chemistry
Oscillating binding energies of all surface chemical species introduces periodic instances of transient behavior to the catalytic surface. For slow oscillation frequencies, the transient period is only a small quantity of the oscillation time scale, and the surface reaction achieves a new steady state. However, as the ...
0
Theoretical and Fundamental Chemistry
There are many ways to define the proportionality constant of Henrys law, which can be subdivided into two fundamental types: One possibility is to put the aqueous phase into the numerator and the gaseous phase into the denominator ("aq/gas"). This results in the Henrys law solubility constant . Its value increases wit...
0
Theoretical and Fundamental Chemistry
Lipid profiling is a targeted metabolomics platform that provides a comprehensive analysis of lipid species within a cell or tissue. Profiling based on electrospray ionization tandem mass spectrometry (ESI-MS/MS) is capable of providing quantitative data and is adaptable to high throughput analyses. The powerful approa...
1
Applied and Interdisciplinary Chemistry
The need for additional nomenclature for organometallic compounds became apparent in the mid-1950s when Dunitz, Orgel, and Rich described the structure of the "sandwich complex" ferrocene by X-ray crystallography where an iron atom is "sandwiched" between two parallel cyclopentadienyl rings. Cotton later proposed the t...
0
Theoretical and Fundamental Chemistry
The journal is abstracted and indexed in: * BIOSIS * Elsevier BIOBASE * Cambridge Scientific Abstracts * Chemical Abstracts Service * Current Contents/Life Sciences * MEDLINE/PubMed * EMBASE
0
Theoretical and Fundamental Chemistry
Isolated photosystems offer the most direct connection between water photolysis and anode reduction. Typically, photosystems are isolated and adsorbed to a conductive surface. A soluble redox mediator (a small molecule capable of accepting and donating electrons) may be required to improve the electrical communicatio...
0
Theoretical and Fundamental Chemistry
A small loop is made in the end of a platinum wire and heated in a Bunsen burner flame until red hot. A stick made of another inert substance such as a magnesia stick (MgO) may also be used. It is then dipped into powdered borax and held in the hottest part of the flame where it swells up as it loses its water of cryst...
0
Theoretical and Fundamental Chemistry
Marquis reagent is used as a simple spot-test to presumptively identify alkaloids as well as other compounds. It is composed of a mixture of formaldehyde and concentrated sulfuric acid, which is dripped onto the substance being tested. The United States Department of Justice method for producing the reagent is the addi...
0
Theoretical and Fundamental Chemistry
Rats that were given a diet containing ptaquiloside for a prolonged period developed tumors in both the ileum and urinary bladder. Prakash, Smith and co-workers showed that ptaquiloside-induced carcinogenesis was initiated by the activation of the H-ras oncogene. Other non-ruminants such as pig, rabbit, and guinea pig,...
0
Theoretical and Fundamental Chemistry
Assuming that catalytic activity largely depends on the catalyst's affinity to the transition state, one could synthesize a transition state analog (TSA), a structure that resembles the transition state of the reaction. Then one could link the TSA to a solid-support or identifiable tag and use that TSA to select an opt...
0
Theoretical and Fundamental Chemistry
In 2017, two research groups from ETH Zurich and from MIT reported on the creation of an ultracold quantum gas with supersolid properties. The Zurich group placed a Bose–Einstein condensate inside two optical resonators, which enhanced the atomic interactions until they started to spontaneously crystallize and form a s...
0
Theoretical and Fundamental Chemistry
Since the wider recognition of the importance of sanitation, marked by the UN declaring 2008 as the Year of Sanitation, there has been a steady increase in commitment, uptake, implementation, and knowledge generation in non-sewered sanitation. The incorporation of the entire sanitation management service chain in the S...
1
Applied and Interdisciplinary Chemistry
Settling basins are used as a separation mechanism to eliminate rejected products (i.e. waste solids management strategies) of a specified size and quantity in various fields, such as aquaculture, mining, dairy, food processing, alcohol production and wine making. Regular draining and desilting of settling basins is re...
1
Applied and Interdisciplinary Chemistry
Starting around 1927, Paul Dirac began the process of unifying quantum mechanics with special relativity by proposing the Dirac equation for the electron. The Dirac equation achieves the relativistic description of the wavefunction of an electron that Schrödinger failed to obtain. It predicts electron spin and led Dira...
1
Applied and Interdisciplinary Chemistry
In chemistry, electro-osmotic flow (EOF, hyphen optional; synonymous with electro-osmosis or electro-endosmosis) is the motion of liquid induced by an applied potential across a porous material, capillary tube, membrane, microchannel, or any other fluid conduit. Because electro-osmotic velocities are independent of co...
0
Theoretical and Fundamental Chemistry
In 2020, the FDA granted orphan drug designation deulinoleate ethyl for the treatment of patients with progressive supranuclear palsy (PSP). PSP is a disease involving modification and dysfunction of tau protein; mechanism of action of deulinoleate ethyl both lowers lipid peroxidation and prevents mitochondrial cell de...
1
Applied and Interdisciplinary Chemistry
Though veterinarians and bovine farmers point to the effectiveness of transfaunation for treating digestive disease, many animal rights groups argue that the practice is unnecessarily harmful to the quality of life of the cannulated cow. Use of a rumen-fluid collector instead of fistulation is well tolerated by the don...
1
Applied and Interdisciplinary Chemistry
Nano-thermite or super-thermite is a metastable intermolecular composite (MIC) characterized by a particle size of its main constituents, a metal and a metal oxide, under 100 nanometers. This allows for high and customizable reaction rates. Nano-thermites contain an oxidizer and a reducing agent, which are intimately m...
0
Theoretical and Fundamental Chemistry
Radiation emitted by a moving source is subject to Doppler shift due to a finite line-of-sight velocity projection. If different parts of the emitting body have different velocities (along the line of sight), the resulting line will be broadened, with the line width proportional to the width of the velocity distributio...
0
Theoretical and Fundamental Chemistry
In a jet engine, each major rotating section usually has a separate gauge devoted to monitoring its speed of rotation. Depending on the make and model, a jet engine may have an N gauge that monitors the low-pressure compressor section and/or fan speed in turbofan engines. The gas generator section may be monitored by ...
1
Applied and Interdisciplinary Chemistry
Studies have indicated that IVF mothers show greater emotional involvement with their child, and they enjoy motherhood more than mothers by natural conception. Similarly, studies have indicated that IVF fathers express more warmth and emotional involvement than fathers by adoption and natural conception and enjoy fathe...
1
Applied and Interdisciplinary Chemistry
RNA splicing errors can have drastic effects on how proteins function, including the hormones secreted by the endocrine system. These effects on hormones have been identified as the cause of many endocrine disorders including thyroid-related pathological conditions, rickets, hyperinsulinemic hypoglycemia and congenital...
1
Applied and Interdisciplinary Chemistry
Norsteroid examples include: 19-norpregnane (from pregnane), desogestrel, ethylestrenol, etynodiol diacetate, ethinylestradiol, gestrinone, levonorgestrel, norethisterone (norethindrone), norgestrel, norpregnatriene (from pregnatriene), quinestrol, 19-norprogesterone (from a progesterone), Nomegestrol acetate, 19-nort...
1
Applied and Interdisciplinary Chemistry