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When the cell is operated at open circuit, I = 0 and the voltage across the output terminals is defined as the open-circuit voltage. Assuming the shunt resistance is high enough to neglect the final term of the characteristic equation, the open-circuit voltage V is:
Similarly, when the cell is operated at short circuit... | 7 | Physical Chemistry |
SH3BP2 (SH3 domain-binding protein 2) is a protein that comes from a gene located on Chromosome 4. SH3BP2 binds differentially to the SH3 domains of certain proteins of signal transduction pathways. It binds to phosphatidylinositols linking the hemopoietic tyrosine kinase fes to the cytoplasmic membrane in a phosphoryl... | 1 | Biochemistry |
The final part dealt with the construction of oxetane ring D starting with protection of the alcohol group in 38 (Scheme 4). as a TROC alcohol 39 with 2,2,2-trichloroethyl chloroformate and pyridine. The OBOM group was replaced by a bromine group in three steps: deprotection to 40 with hydrochloric acid and sodium io... | 0 | Organic Chemistry |
In cells with progressively increasing expression of IL12 and IL6, SOCSs production and activity suppress cytokine signalling and phosphorylation of JAK-STAT pathways in a negative feedback loop.
Other suppressors of the pathways are: protein inhibitor of activated STAT (PAIS) (regulation of transcriptional activity in... | 1 | Biochemistry |
Before work hardening, the lattice of the material exhibits a regular, nearly defect-free pattern (almost no dislocations). The defect-free lattice can be created or restored at any time by annealing. As the material is work hardened it becomes increasingly saturated with new dislocations, and more dislocations are pre... | 8 | Metallurgy |
The emergence of metallurgy in pre-Columbian Mesoamerica occurred relatively late in the region's history, with distinctive works of metal apparent in West Mexico by roughly 800 CE, and perhaps as early as 600 CE. Metallurgical techniques likely diffused northward from regions in Central or South America via maritime ... | 8 | Metallurgy |
A trace fossil, also known as an ichnofossil (; from ikhnos "trace, track"), is a fossil record of biological activity by lifeforms but not the preserved remains of the organism itself. Trace fossils contrast with body fossils, which are the fossilized remains of parts of organisms' bodies, usually altered by later ch... | 2 | Environmental Chemistry |
Dual-flow, also known as dual, countercurrent chromatography occurs when both phases are flowing in opposite directions inside the column. Instruments are available for dual-flow operation for both Hydrodynamic and hydrostatic CCC. Dual-flow countercurrent chromatography was first described by Yoichiro Ito in 1985 for ... | 3 | Analytical Chemistry |
Proteins, unlike nucleic acids, can have varying charges and complex shapes, therefore they may not migrate into the polyacrylamide gel at similar rates, or all when placing a negative to positive EMF on the sample. Proteins, therefore, are usually denatured in the presence of a detergent such as sodium dodecyl sulfate... | 1 | Biochemistry |
In the United States, Water Quality Standards are defined by state agencies for various water bodies, guided by the desired uses for the water body (e.g., fish habitat, drinking water supply, recreational use). The Clean Water Act (CWA) requires each governing jurisdiction (states, territories, and covered tribal entit... | 3 | Analytical Chemistry |
Deuterium is produced for industrial, scientific and military purposes, by starting with ordinary water—a small fraction of which is naturally-occurring heavy water—and then separating out the heavy water by the Girdler sulfide process, distillation, or other methods.
In theory, deuterium for heavy water could be creat... | 9 | Geochemistry |
The emission directly after the excitation is spectrally very broad, yet still centered in the vicinity of the strongest exciton resonance. As the carrier distribution relaxes and cools, the width of the PL peak decreases and the emission energy shifts to match the ground state of the exciton (such as an electron) for... | 7 | Physical Chemistry |
The intermolecular oxidations of olefins with alcohols as nucleophile typically generate ketals, where as the palladium-catalyzed oxidations of olefins with carboxylic acids as nucleophile generates vinylic or allylic carboxylates. In case of diols, their reactions with alkenes typically generate ketals, whereas reacti... | 0 | Organic Chemistry |
TEOS-10 includes the Gibbs Seawater (GSW) Oceanographic Toolbox which is available as open source software in MATLAB, Fortran, Python, C, C++, R, Julia and PHP. While TEOS-10 is generally expressed in basic SI-units, the GSW package uses input and output data in commonly used oceanographic units (such as g/kg for Absol... | 7 | Physical Chemistry |
:* A graft polymer molecule is a branched polymer molecule in which one or more of the side chains are different, structurally or configurationally, from the main chain.
:* A star-shaped polymer molecule is a branched polymer molecule in which a single branch point gives rise to multiple linear chains or arms. If the a... | 7 | Physical Chemistry |
Pressure Injection Cells, sometimes referred to as "bomb-loading devices" are used in proteomic research to enable controlled dispensing of small-volume liquid samples. | 3 | Analytical Chemistry |
The word "alcohol" derives from the Arabic kohl (), a powder used as an eyeliner. The first part of the word () is the Arabic definite article, equivalent to the in English. The second part of the word () has several antecedents in Semitic languages, ultimately deriving from the Akkadian (), meaning stibnite or antimo... | 0 | Organic Chemistry |
Trace fossils are important paleoecological and paleoenvironmental indicators, because they are preserved in situ, or in the life position of the organism that made them. Because identical fossils can be created by a range of different organisms, trace fossils can only reliably inform us of two things: the consistency ... | 2 | Environmental Chemistry |
FSP was used to modify a Mg alloy and insert nano-sized SiO. The test was conducted a total four times with the average grain size varying from 0.5–2μm. This nearly doubled the hardness of the Mg and also increased the super-plasticity. At room temperature, the yield stress of the FSP composites was improved in the 1D... | 8 | Metallurgy |
Genetic variants in the CYP21A2 gene cause a disturbance in the development of the enzyme, leading to congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency. Gene conversion events involving the functional gene and the pseudogene account for many cases of steroid 21-hydroxylase deficiency. CAH is an auto... | 1 | Biochemistry |
García Mancheño was successful is acquiring funding from the European Research Council in 2017 to start her research program at the University of Münster. She has been a speaker at several training events to help other early career scientists in Germany to acquire funding for their research programs. In 2018 she was a ... | 0 | Organic Chemistry |
The presence of a vapor bubble adds an additional component for analysis given that the vapor bubble could contain a significant proportion of the HO and CO originally in the melt sampled by the melt inclusion. If the vapor bubble is composed primarily of CO, Raman spectroscopy can be used to determine the density of C... | 9 | Geochemistry |
Because of the widespread use and importance of iron and steel products, the prevention or slowing of rust is the basis of major economic activities in a number of specialized technologies. A brief overview of methods is presented here; for detailed coverage, see the cross-referenced articles.
Rust is permeable to air ... | 8 | Metallurgy |
Biogenic silica is the major source of silica for diagenesis. One of the prominent examples is the presence of silica in phytoliths in the leaves of plants, ie. grasses, and Equisetaceae. Some suggested that silica present in phytoliths can serve as a defense mechanism against the herbivores, where the presence of sili... | 9 | Geochemistry |
One approach to prevent PDs consists of physical-chemical optimization of the PCR system, i.e. changing the concentrations of primers, magnesium chloride, nucleotides, ionic strength and temperature of the reaction. This method is somewhat limited by the physical-chemical characteristics that also determine the effici... | 1 | Biochemistry |
Mass spectrometry provides information about the structure and composition of the complexes. Spectra for metal polycarbonyls are often easily interpretable, because the dominant fragmentation process is the loss of carbonyl ligands (m/z = 28).
: → + CO
Electron ionization is the most common technique for characterizin... | 0 | Organic Chemistry |
Gene nomenclature is the scientific naming of genes, the units of heredity in living organisms. It is also closely associated with protein nomenclature, as genes and the proteins they code for usually have similar nomenclature. An international committee published recommendations for genetic symbols and nomenclature in... | 1 | Biochemistry |
In chemical kinetics, an intrinsic low-dimensional manifold is a technique to simplify the study of reaction mechanisms using dynamical systems, first proposed in 1992.
The ILDM approach fixes a low dimensional surface which describes well the slow dynamics and assumes that after a short time the fast dynamics are less... | 7 | Physical Chemistry |
Inoculate MacConkey's (Glucose phosphate broth) with pure culture of test organism. Incubate the broth at 35 °C for 48–72 hours.
After incubation add 5 drops of methyl red directly into the broth, through the sides of the tube. | 3 | Analytical Chemistry |
An important use of MLPA is to determine relative ploidy. For example, probes may be designed to target various regions of chromosome 21 of a human cell. The signal strengths of the probes are compared with those obtained from a reference DNA sample known to have two copies of the chromosome. If an extra copy is prese... | 1 | Biochemistry |
Spectral purity is a term used in both optics and signal processing. In optics, it refers to the quantification of the monochromaticity of a given light sample. This is a particularly important parameter in areas like laser operation and time measurement. Spectral purity is easier to achieve in devices that generate v... | 7 | Physical Chemistry |
Some examples of stannide Zintl ions are listed below. Some of them contain 2-centre 2-electron bonds (2c-2e), others are "electron deficient" and bonding sometimes can be described using polyhedral skeletal electron pair theory (Wades rules) where the number of valence electrons contributed by each tin atom is conside... | 7 | Physical Chemistry |
The maskant to be used is determined primarily by the chemical used to etch the material, and the material itself. The maskant must adhere to the surface of the material, and it must also be chemically inert enough with regard to the etchant to protect the workpiece. Most modern chemical milling processes use maskants ... | 8 | Metallurgy |
A solvent will be more likely to promote ionization of a dissolved acidic molecule in the following circumstances:
# It is a protic solvent, capable of forming hydrogen bonds.
# It has a high donor number, making it a strong Lewis base.
# It has a high dielectric constant (relative permittivity), making it a good solve... | 7 | Physical Chemistry |
Hydrogen–deuterium exchange (also called H–D or H/D exchange) is a chemical reaction in which a covalently bonded hydrogen atom is replaced by a deuterium atom, or vice versa. It can be applied most easily to exchangeable protons and deuterons, where such a transformation occurs in the presence of a suitable deuterium ... | 7 | Physical Chemistry |
A major source of differentiation is fractionation, an unequal distribution of elements and isotopes. This can be the result of chemical reactions, phase changes, kinetic effects, or radioactivity.
On the largest scale, planetary differentiation is a physical and chemical separation of a planet into chemically distinct... | 9 | Geochemistry |
Things become slightly more complicated than this because organisms contain two (or more) copies of each gene, known as the two alleles. So, if a sample is taken from a patient and amplified using PCR both copies of the region of DNA (alleles) of interest are amplified. So if we are looking for mutation there are n... | 1 | Biochemistry |
The unlinked galR gene encodes the repressor for this system. A tetrameric GalR repressor binds to 2 operators, one located at +55 and one located at -60 relative to the PG1 start site. Looping of the DNA blocks the access of RNA polymerase to promoters and/or inhibits formation of the open complex. This looping requir... | 1 | Biochemistry |
The basis for the COD test is that nearly all organic compounds can be fully oxidized to carbon dioxide with a strong oxidizing agent under acidic conditions. The amount of oxygen required to oxidize an organic compound to carbon dioxide, ammonia, and water is given by:
This expression does not include the oxygen deman... | 9 | Geochemistry |
Orobol can be found in Streptomyces neyagawaensis (an Actinobacterium). Phenolic compounds can be found in the cyanobacterium Arthrospira maxima, used in the dietary supplement, Spirulina. The three cyanobacteria Microcystis aeruginosa, Cylindrospermopsis raciborskii and Oscillatoria sp. are the subject of research in... | 0 | Organic Chemistry |
The electric eel, Electrophorus, is capable of delivering a powerful electric shock that can stun or kill its prey. Bluntnose knifefishes, Brachyhypopomus, create an electric discharge pattern similar to the low voltage electrolocation discharge of the electric eel. This is thought to be Batesian mimicry of the powerfu... | 1 | Biochemistry |
Fretting decreases fatigue strength of materials operating under cycling stress. This can result in fretting fatigue, whereby fatigue cracks can initiate in the fretting zone. Afterwards, the crack propagates into the material. Lap joints, common on airframe surfaces, are a prime location for fretting corrosion. This i... | 8 | Metallurgy |
Glycosyltransferases have been widely used in both the targeted synthesis of specific glycoconjugates as well as the synthesis of differentially glycosylated libraries of drugs, biological probes or natural products in the context of drug discovery and drug development (a process known as glycorandomization). Suitable ... | 0 | Organic Chemistry |
The natural selection power for dephosphorylation is less understood. A recent study has found that IRF9, which is from the interferon-regulatory factors family (IRFs), a critical family for anti-viral immune response, could be influenced by natural selection during Human species evolution. The positive selection has b... | 1 | Biochemistry |
The pyroelectric coefficient may be described as the change in the spontaneous polarization vector with temperature:
where p (CmK) is the vector for the pyroelectric coefficient. | 7 | Physical Chemistry |
Contig can also refer to the overlapping clones that form a physical map of a chromosome when the top-down or hierarchical sequencing strategy is used. In this sequencing method, a low-resolution map is made prior to sequencing in order to provide a framework to guide the later assembly of the sequence reads of the ge... | 1 | Biochemistry |
The convention for a nucleic acid sequence is to list the nucleotides as they occur from the 5 end to the 3 end of the polymer chain, where 5 and 3 refer to the numbering of carbons around the ribose ring which participate in forming the phosphate diester linkages of the chain. Such a sequence is called the primary str... | 1 | Biochemistry |
Dibasic esters are used in paints, coil coatings, paint strippers, coatings, plasticisers, resins, binders, solvents, polyols, soil stabilization, chemical grouting, oilfield drilling fluids, crop protection products, cedar spray, and adhesives. | 0 | Organic Chemistry |
Endoreversible thermodynamics is a subset of irreversible thermodynamics aimed at making more realistic assumptions about heat transfer than are typically made in reversible thermodynamics. It gives an upper bound on the power that can be derived from a real process that is lower than that predicted by Carnot for a Car... | 7 | Physical Chemistry |
In thermochemistry, the Thomsen–Berthelot principle is a hypothesis in the history of chemistry which argued that all chemical changes are accompanied by the production of heat and that processes which occur will be ones in which the most heat is produced. This principle was formulated in slightly different versions by... | 7 | Physical Chemistry |
Industrially, tert-butyl hydroperoxide is used to prepare propylene oxide. In the Halcon process, molybdenum-based catalysts are used for this reaction:
:(CH)COOH + CH=CHCH → (CH)COH + CHOCHCH
The byproduct t-butanol can be dehydrated to isobutene and converted to MTBE.
On a much smaller scale, tert-butyl hydrop... | 0 | Organic Chemistry |
To date, few in-depth studies on the in vivo behavior of PAMAM dendrimers have been carried out. This could be in part due to the diverse behavior of PAMAMs depending on surface modification (see below), which make characterization of their in vivo properties largely case-dependent. Nonetheless, the fate and transport ... | 6 | Supramolecular Chemistry |
A micellar cubic phase is a lyotropic liquid crystal phase formed when the concentration of micelles dispersed in a solvent (usually water) is sufficiently high that they are forced to pack into a structure having a long-ranged positional (translational) order. For example, spherical micelles a cubic packing of a body-... | 7 | Physical Chemistry |
Early examples were often uncovered by the observation of precipitates or color changes from samples that were exposed to sunlights. The first reported case was by Ciamician that sunlight converted santonin to a yellow photoproduct:
An early example of a precipitate was the photodimerization of anthracene, characterize... | 5 | Photochemistry |
Super-enhancers have been most commonly identified by locating genomic regions that are highly enriched in ChIP-Seq signal. ChIP-Seq experiments targeting master transcription factors and co-factors like Mediator or BRD4 have been used, but the most frequently used is H3K27ac-marked nucleosomes. The program “ROSE” (Ra... | 1 | Biochemistry |
Hassan Naim received his Ph.D. degree in biochemistry from the University of Bern, Switzerland. Following appointments at the Biochemistry Department, University of Lausanne (membrane transport in T cells) and the University Children’s Hospital Bern (structure and function of brush border membrane proteins) he moved i... | 1 | Biochemistry |
A Pd–Cu bimetallic system was not discovered until 2006 when Goossen et al. reported a decarboxylative cross-coupling of aryl halides with ortho-substituted aromatic carboxylic acids.
Through subsequent studies it was found that the use of aryl triflates allowed substrate scope for cross-coupling to be extended to some... | 0 | Organic Chemistry |
In contrast to animals, fungi and non-vascular plants, the cells of flowering plants lack dynein motors. However, they contain a larger number of different kinesins. Many of these plant-specific kinesin groups are specialized for functions during plant cell mitosis. Plant cells differ from animal cells in that they hav... | 6 | Supramolecular Chemistry |
Dendrimers have potential applications in sensors. Studied systems include proton or pH sensors using poly(propylene imine), cadmium-sulfide/polypropylenimine tetrahexacontaamine dendrimer composites to detect fluorescence signal quenching, and poly(propylenamine) first and second generation dendrimers for metal cation... | 6 | Supramolecular Chemistry |
The utility of palladium-catalyzed cross-coupling reactions is enhanced by the use of N-heterocyclic carbene ligands. Indeed, Pd-NHC complexes have been proven effective in Suzuki-Miyaura, Negishi, Sonogashira, Kumada-Tamao-Corriu, Hiyama, and Stille cross-coupling. Compared to the corresponding Pd-phosphine catalysts,... | 0 | Organic Chemistry |
Spin chemistry is a sub-field of chemistry positioned at the intersection of chemical kinetics, photochemistry, magnetic resonance and free radical chemistry, that deals with magnetic and spin effects in chemical reactions. Spin chemistry concerns phenomena such as chemically induced dynamic nuclear polarization (CIDNP... | 7 | Physical Chemistry |
In information theory, the Kraft–McMillan theorem establishes that any directly decodable coding scheme for coding a message to identify one value out of a set of possibilities can be seen as representing an implicit probability distribution over , where is the length of the code for in bits. Therefore, relative e... | 7 | Physical Chemistry |
Weatherization is a set of measures and practices aimed at improving the energy efficiency of a building or home, primarily to reduce energy consumption and lower utility bills. The main goal of weatherization is to make a structure more comfortable and cost-effective to live in, especially during extreme weather condi... | 7 | Physical Chemistry |
It has been shown that host cells regulate L1 retrotransposition activity, for example through epigenetic silencing.
For example, the RNA interference (RNAi) mechanism of small interfering RNAs derived from L1 sequences can cause suppression of L1 retrotransposition.
In plant genomes, epigenetic modification of LINEs c... | 1 | Biochemistry |
Transition metal benzyne complexes are organometallic complexes that contain benzyne ligands (CH). Unlike benzyne itself, these complexes are less reactive although they undergo a number of insertion reactions. | 0 | Organic Chemistry |
Vortex tubes have lower efficiency than traditional air conditioning equipment. They are commonly used for inexpensive spot cooling, when compressed air is available. | 7 | Physical Chemistry |
Both the legacy NACE and SSPC organizations were ANSI-accredited standards developers, which AMPP plans to continue. The merged standards program includes 25 standing standards committees that develop technical standards for industries including cathodic protection, coatings, defense, highways and bridges, rail, mariti... | 8 | Metallurgy |
Gases exhibit by far the greatest space (and, consequently, the weakest intermolecular forces) between their atoms or molecules; since intermolecular interactions are minuscule in comparison to those in liquids and solids, dilute gases very easily form solutions with one another. Air is one such example: it can be more... | 7 | Physical Chemistry |
"Biological activity is a dominant force shaping the chemical structure and evolution of the earth surface environment. The presence of an oxygenated atmosphere-hydrosphere surrounding an otherwise highly reducing solid earth is the most striking consequence of the rise of life on earth. Biological evolution and the fu... | 9 | Geochemistry |
*Calcium carbonate (limestone or chalk) decomposes into calcium oxide and carbon dioxide when heated. The chemical reaction is as follows:
::CaCO → CaO + CO
:The reaction is used to make quick lime, which is an industrially important product.
:Another example of thermal decomposition is 2Pb(NO) → 2PbO + O + 4NO.
*Some ... | 7 | Physical Chemistry |
The eukaryotic genome is organized into a compact chromatin structure that allows only regulated access to DNA. The chromatin structure can be globally "open" and more transcriptionally permissive, or globally "condensed" and transcriptionally inactive. The former (euchromatin) is lightly packed and rich in genes under... | 1 | Biochemistry |
The first synthetic immobilized enzyme was made in the 1950s, performed by the inclusion of enzyme into polymeric matrices or binding onto carrier substances. Also cross-linking procedure was applied by cross-linking of protein alone or along with the addition of inert materials. Over the last decade various immobiliza... | 4 | Stereochemistry |
As a result of these criticisms and the renewed awareness of the three-dimensional effects of drug action fueled by the exponential explosion of chiral technology emerged the new area "stereo-pharmacology". A more specific term is "chiral pharmacology", a phrase popularized by John Caldwell. This field has grown itself... | 4 | Stereochemistry |
Matrix isolation is an experimental technique used in chemistry and physics. It generally involves a material being trapped within an unreactive matrix. A host matrix is a continuous solid phase in which guest particles (atoms, molecules, ions, etc.) are embedded. The guest is said to be isolated within the host matrix... | 7 | Physical Chemistry |
Ketamine is a widely used anaesthetic agent. It is a chiral molecule that is administered as a racemate. Studies show that (S)-(+)-ketamine is the active anaesthetic and the undesired side-effects (hallucination and agitation) reside in the distomer, (R)-(-)-ketamine. | 4 | Stereochemistry |
The nitrogen cycle is an important process in the ocean as well. While the overall cycle is similar, there are different players and modes of transfer for nitrogen in the ocean. Nitrogen enters the water through the precipitation, runoff, or as from the atmosphere. Nitrogen cannot be utilized by phytoplankton as so i... | 1 | Biochemistry |
Ortho esters are readily hydrolyzed in mild aqueous acid to form esters:
: RC(OR′) + HO → RCOR′ + 2 R′OH
For example, trimethyl orthoformate CH(OCH) may be hydrolyzed (under acidic conditions) to methyl formate and methanol; and may be further hydrolyzed (under alkaline conditions) to salts of formic acid and methanol. | 0 | Organic Chemistry |
Multi-wavelength anomalous diffraction (sometimes Multi-wavelength anomalous dispersion; abbreviated MAD) is a technique used in X-ray crystallography that facilitates the determination of the three-dimensional structure of biological macromolecules (e.g. DNA, drug receptors) via solution of the phase problem.
MAD was ... | 3 | Analytical Chemistry |
The arrangement of atoms and ions within a material is one of the most important structural properties of a biomaterial. The atomic structure of a material can be viewed at different levels, the sub atomic level, atomic or molecular level, as well as the ultra-structure created by the atoms and molecules. Intermolecula... | 1 | Biochemistry |
In chemistry, alpha elimination refers to particular types of elimination reactions. The definition of alpha elimination differs for organometallic and organic chemistry. | 0 | Organic Chemistry |
Consider the simple three step pathway:
where and are fixed boundary species, the control equations for this pathway can be derived in a similar manner to the simple two step pathway although it is somewhat more tedious.
where D the denominator is given by
Note that every term in the numerator appears in the denomina... | 1 | Biochemistry |
While small-scale columns range from inner diameters of 0.5 cm and withstand pressures of up to 130 MPa, industrial large scale columns reach diameters of up to 2 m and operate at considerable lower pressures (below 1 MPa). While it is favorable to view the packed bed of a column large scale columns are manufactured fr... | 3 | Analytical Chemistry |
Three conditions must be present for oil reservoirs to form:
* A source rock rich in hydrocarbon material buried deeply enough for subterranean heat to cook it into oil,
* A porous and permeable reservoir rock where it can accumulate,
* A caprock (seal) or other mechanism to prevent the oil from escaping to the surface... | 7 | Physical Chemistry |
There are 4 superfamilies of viruses that cover all RNA-containing viruses with no DNA stage:
* Viruses containing positive-strand RNA or double-strand RNA, except retroviruses and Birnaviridae
** All positive-strand RNA eukaryotic viruses with no DNA stage
** All RNA-containing bacteriophages; there are two families o... | 1 | Biochemistry |
Selenium is an essential micronutrient for animals, though it is toxic in large doses. In plants, it sometimes occurs in toxic amounts as forage, e.g. locoweed. Selenium is a component of the amino acids selenocysteine and selenomethionine. In humans, selenium is a trace element nutrient that functions as cofactor for ... | 1 | Biochemistry |
* History of organic chemistry
* IUPAC nomenclature of organic chemistry
* Organic reaction
* Organic compound
* Organic synthesis
** Retrosynthetic analysis | 0 | Organic Chemistry |
The premise behind these skimmers is that a high pressure pump combined with a venturi, can be used to introduce the bubbles into the water stream. The tank water is pumped through the venturi, in which fine bubbles are introduced via pressure differential, then enters the skimmer body. This method was popular due to... | 3 | Analytical Chemistry |
Foldit is an online puzzle video game about protein folding. It is part of an experimental research project developed by the University of Washington, Center for Game Science, in collaboration with the UW Department of Biochemistry. The objective of Foldit is to fold the structures of selected proteins as perfectly as ... | 1 | Biochemistry |
Most detection mechanisms involved in small molecule sensors comprise some modulation in the fluorescent behavior of the sensing molecule upon binding the target metal. When a metal coordinates to such a sensor, it may either enhance or reduce the original fluorescent emission. The former is known as the Chelation Enha... | 5 | Photochemistry |
In inorganic chemistry, a homoleptic chemical compound is a metal compound with all ligands identical. The term uses the "homo-" prefix to indicate that something is the same for all. Any metal species which has more than one type of ligand is heteroleptic.
Some compounds with names that suggest that they are homolepti... | 0 | Organic Chemistry |
The LTFT facility Pearl GTL at Ras Laffan, Qatar, is the second largest FT plant in the world after Sasol's Secunda plant in South Africa. It uses cobalt catalysts at 230 °C, converting natural gas to petroleum liquids at a rate of , with additional production of of oil equivalent in natural gas liquids and ethane.
An... | 0 | Organic Chemistry |
There is an extension to DLTS known as a high resolution Laplace transform DLTS (LDLTS). Laplace DLTS is an isothermal technique in which the capacitance transients are digitized and averaged at a fixed temperature. Then the defect emission rates are obtained with a use of numerical methods being equivalent to the inve... | 7 | Physical Chemistry |
In 1988, The NIST group in Washington led by William Phillips first measured temperatures below the Doppler limit in sodium atoms in an optical molasses, prompting the search for the theoretical underpinnings of sub-Doppler cooling.
The next year, Jean Dalibard and Claude Cohen-Tannoudji identified the cause as the mul... | 7 | Physical Chemistry |
Ascorbic acid is a furan-based lactone of 2-ketogluconic acid. It contains an adjacent enediol adjacent to the carbonyl. This −C(OH)=C(OH)−C(=O)− structural pattern is characteristic of reductones, and increases the acidity of one of the enol hydroxyl groups. The deprotonated conjugate base is the ascorbate anion, whic... | 1 | Biochemistry |
Despite being larger and heavier than other bioaerosols, some studies show that pollen can be transported thousands of kilometers. They are a major source of wind-dispersed allergens, coming particularly from seasonal releases from grasses and trees. Tracking distance, transport, resources, and deposition of pollen to ... | 7 | Physical Chemistry |
* [https://dx.doi.org/10.1016/1359-6454(95)00146-7 A one-parmenter approach to determining the critical conditions for the initiation of dynamic recrystallization], onset of DRX
* [https://dx.doi.org/10.1007/s11661-009-0029-5 Flow Curve Analysis of 17–4 PH Stainless Steel under Hot Compression Test], comprehensive stud... | 8 | Metallurgy |
Vapor phase osmometry is well suited for the analysis of oligomers and short polymers while higher polymers can be analyzed using other techniques such as membrane osmometry and light scattering. As of 2008, VPO faces competition from matrix-assisted laser desorption ionisation mass spectrometry (MALDI-MS), but VPO sti... | 7 | Physical Chemistry |
Various methods for the production of singlet oxygen exist. Irradiation of oxygen gas in the presence of an organic dye as a sensitizer, such as rose bengal, methylene blue, or porphyrins—a photochemical method—results in its production. Large steady state concentrations of singlet oxygen are reported from the reaction... | 7 | Physical Chemistry |
Dielectrophoretic digital sorting method utilizes a semiconductor controlled array of electrodes in a microfluidic chip to trap single cells in Dielectrophoretic (DEP) cages. Cell identification is ensured by the combination of fluorescent markers with image observation. Precision delivery is ensured by the semiconduct... | 1 | Biochemistry |
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 | Biochemistry |
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