Photolysis: Chemical bond cleavage reactions resulting from absorption of radiant energy.PhotochemistryEthylenediaminesCarbon Monoxide: Carbon monoxide (CO). A poisonous colorless, odorless, tasteless gas. It combines with hemoglobin to form carboxyhemoglobin, which has no oxygen carrying capacity. The resultant oxygen deprivation causes headache, dizziness, decreased pulse and respiratory rates, unconsciousness, and death. (From Merck Index, 11th ed)Diazonium CompoundsLasers: An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.PhenoxyacetatesKinetics: The rate dynamics in chemical or physical systems.Azides: Organic or inorganic compounds that contain the -N3 group.Myoglobin: A conjugated protein which is the oxygen-transporting pigment of muscle. It is made up of one globin polypeptide chain and one heme group.Affinity Labels: Analogs of those substrates or compounds which bind naturally at the active sites of proteins, enzymes, antibodies, steroids, or physiological receptors. These analogs form a stable covalent bond at the binding site, thereby acting as inhibitors of the proteins or steroids.Chelating Agents: Chemicals that bind to and remove ions from solutions. Many chelating agents function through the formation of COORDINATION COMPLEXES with METALS.CarboxyhemoglobinSpectrophotometry: The art or process of comparing photometrically the relative intensities of the light in different parts of the spectrum.Whales: Large marine mammals of the order CETACEA. In the past, they were commercially valued for whale oil, for their flesh as human food and in ANIMAL FEED and FERTILIZERS, and for baleen. Today, there is a moratorium on most commercial whaling, as all species are either listed as endangered or threatened.Ultraviolet Rays: That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants.Calcium: A basic element found in nearly all organized tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.Light: That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.Spectrum Analysis: The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Acetates: Derivatives of ACETIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain the carboxymethane structure.Heme: The color-furnishing portion of hemoglobin. It is found free in tissues and as the prosthetic group in many hemeproteins.Rhodopsin: A purplish-red, light-sensitive pigment found in RETINAL ROD CELLS of most vertebrates. It is a complex consisting of a molecule of ROD OPSIN and a molecule of 11-cis retinal (RETINALDEHYDE). Rhodopsin exhibits peak absorption wavelength at about 500 nm.Egtazic Acid: A chelating agent relatively more specific for calcium and less toxic than EDETIC ACID.Retinal Pigments: Photosensitive protein complexes of varied light absorption properties which are expressed in the PHOTORECEPTOR CELLS. They are OPSINS conjugated with VITAMIN A-based chromophores. Chromophores capture photons of light, leading to the activation of opsins and a biochemical cascade that ultimately excites the photoreceptor cells.Photochemical Processes: Chemical reactions effected by light.Biophysical Phenomena: The physical characteristics and processes of biological systems.Inositol 1,4,5-Trisphosphate: Intracellular messenger formed by the action of phospholipase C on phosphatidylinositol 4,5-bisphosphate, which is one of the phospholipids that make up the cell membrane. Inositol 1,4,5-trisphosphate is released into the cytoplasm where it releases calcium ions from internal stores within the cell's endoplasmic reticulum. These calcium ions stimulate the activity of B kinase or calmodulin.Biophysics: The study of PHYSICAL PHENOMENA and PHYSICAL PROCESSES as applied to living things.Psoas Muscles: A powerful flexor of the thigh at the hip joint (psoas major) and a weak flexor of the trunk and lumbar spinal column (psoas minor). Psoas is derived from the Greek "psoa", the plural meaning "muscles of the loin". It is a common site of infection manifesting as abscess (PSOAS ABSCESS). The psoas muscles and their fibers are also used frequently in experiments in muscle physiology.Hemeproteins: Proteins that contain an iron-porphyrin, or heme, prosthetic group resembling that of hemoglobin. (From Lehninger, Principles of Biochemistry, 1982, p480)Hydroxyl Radical: The univalent radical OH. Hydroxyl radical is a potent oxidizing agent.Hemoglobin A: Normal adult human hemoglobin. The globin moiety consists of two alpha and two beta chains.Octopodiformes: A superorder in the class CEPHALOPODA, consisting of the orders Octopoda (octopus) with over 200 species and Vampyromorpha with a single species. The latter is a phylogenetic relic but holds the key to the origins of Octopoda.Electron Transport Complex IV: A multisubunit enzyme complex containing CYTOCHROME A GROUP; CYTOCHROME A3; two copper atoms; and 13 different protein subunits. It is the terminal oxidase complex of the RESPIRATORY CHAIN and collects electrons that are transferred from the reduced CYTOCHROME C GROUP and donates them to molecular OXYGEN, which is then reduced to water. The redox reaction is simultaneously coupled to the transport of PROTONS across the inner mitochondrial membrane.Spectrum Analysis, Raman: Analysis of the intensity of Raman scattering of monochromatic light as a function of frequency of the scattered light.Oxidation-Reduction: A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).Hemoglobins: The oxygen-carrying proteins of ERYTHROCYTES. They are found in all vertebrates and some invertebrates. The number of globin subunits in the hemoglobin quaternary structure differs between species. Structures range from monomeric to a variety of multimeric arrangements.Adenosine Triphosphate: An adenine nucleotide containing three phosphate groups esterified to the sugar moiety. In addition to its crucial roles in metabolism adenosine triphosphate is a neurotransmitter.Hydrocarbons, HalogenatedHalogens: A family of nonmetallic, generally electronegative, elements that form group 17 (formerly group VIIa) of the periodic table.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Inventors: Persons or entities that introduce a novel composition, device, or process, as well as improvements thereof.Alexander Disease: Rare leukoencephalopathy with infantile-onset accumulation of Rosenthal fibers in the subpial, periventricular, and subependymal zones of the brain. Rosenthal fibers are GLIAL FIBRILLARY ACIDIC PROTEIN aggregates found in ASTROCYTES. Juvenile- and adult-onset types show progressive atrophy of the lower brainstem instead. De novo mutations in the GFAP gene are associated with the disease with propensity for paternal inheritance.Intellectual Property: Property, such as patents, trademarks, and copyright, that results from creative effort. The Patent and Copyright Clause (Art. 1, Sec. 8, cl. 8) of the United States Constitution provides for promoting the progress of science and useful arts by securing for limited times to authors and inventors, the exclusive right to their respective writings and discoveries. (From Black's Law Dictionary, 5th ed, p1014)Ion Channels: Gated, ion-selective glycoproteins that traverse membranes. The stimulus for ION CHANNEL GATING can be due to a variety of stimuli such as LIGANDS, a TRANSMEMBRANE POTENTIAL DIFFERENCE, mechanical deformation or through INTRACELLULAR SIGNALING PEPTIDES AND PROTEINS.Mechanotransduction, Cellular: The process by which cells convert mechanical stimuli into a chemical response. It can occur in both cells specialized for sensing mechanical cues such as MECHANORECEPTORS, and in parenchymal cells whose primary function is not mechanosensory.Calcium Channels: Voltage-dependent cell membrane glycoproteins selectively permeable to calcium ions. They are categorized as L-, T-, N-, P-, Q-, and R-types based on the activation and inactivation kinetics, ion specificity, and sensitivity to drugs and toxins. The L- and T-types are present throughout the cardiovascular and central nervous systems and the N-, P-, Q-, & R-types are located in neuronal tissue.Ion Channel Gating: The opening and closing of ion channels due to a stimulus. The stimulus can be a change in membrane potential (voltage-gated), drugs or chemical transmitters (ligand-gated), or a mechanical deformation. Gating is thought to involve conformational changes of the ion channel which alters selective permeability.Drug Delivery Systems: Systems for the delivery of drugs to target sites of pharmacological actions. Technologies employed include those concerning drug preparation, route of administration, site targeting, metabolism, and toxicity.Models, Molecular: Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.Libraries, Digital: Libraries in which a major proportion of the resources are available in machine-readable format, rather than on paper or MICROFORM.Dienestrol: A synthetic, non-steroidal estrogen structurally related to stilbestrol. It is used, usually as the cream, in the treatment of menopausal and postmenopausal symptoms.Quantum Theory: The theory that the radiation and absorption of energy take place in definite quantities called quanta (E) which vary in size and are defined by the equation E=hv in which h is Planck's constant and v is the frequency of the radiation.Libraries: Collections of systematically acquired and organized information resources, and usually providing assistance to users. (ERIC Thesaurus, http://www.eric.ed.gov/ accessed 2/1/2008)Library Automation: The use of automatic machines or processing devices in libraries. The automation may be applied to library administrative activities, office procedures, and delivery of library services to users.Phosphines: Inorganic or organic compounds derived from phosphine (PH3) by the replacement of H atoms. (From Grant & Hackh's Chemical Dictionary, 5th ed)Amido Black: A dye used to stain proteins in electrophoretic techniques. It is used interchangeably with its acid form.
The rapid photolysis and reformation of ozone heats the stratosphere resulting in a temperature inversion. This increase of ... Ozone (O3) photolysis produces O and O2. The oxygen atom product combines with atmospheric molecular oxygen to reform O3, ... The increase of temperature with altitude is a result of the absorption of the Sun's ultraviolet radiation by the ozone layer. ... Stratospheric warming of the polar vortex results in its weakening. When the vortex is strong, it keeps the cold, high pressure ...
At a pressure of 0.1 mm Hg,five percent of the result is S2O2. Disulfur dioxide is formed transiently when hydrogen sulfide and ... oxygen undergo flash photolysis. The ionisation energy of disulfur dioxide is 9.93±0.02 eV. Disulfur dioxide absorbs at 320-400 ...
Photolysis is performed resulting in photoactivation of the TIVA tag in the target cell or cells. Specifically, uncaging of the ... To confirm that the cell is not damaged during photolysis, the cell is imaged with the confocal microscope. Using a glass ...
As a result, conversion efficiencies are low unless lipid-soluble redox mediators are included in the system. Cyanobacteria are ... Isolated photosystems offer the most direct connection between water photolysis and anode reduction. Typically, photosystems ... A relatively high-potential reaction takes place at the cathode, and the resulting potential difference drives current through ... electrons generated by photolysis of water are transferred to an anode. ...
Photolysis causes the release of an iron atom and two molecules of carbon monoxide. In the holoenzyme the Fe and CO molecules ... As mentioned, irradiation of the co-factor with UV light results in the loss of CO and Fe. In addition the 542 Da compound can ... Expression of the Hmd gene in E. coli without the co-factor results in an inactive holoenzyme. However hydrogenase activity can ...
Photolysis of 2 results in the initial formation of an biradical intermediate with a cyclopropane ring formed. This product ... The compound was first synthesised in 1963 by G. Schröder by photolysis of a dimer of cyclooctatetraene with expulsion of ... As a fluxional molecule, bullvalene is subject to degenerate Cope rearrangements, with the result that all carbon atoms and ... The compound was first prepared by photolysis of barrelene in isopentane with acetone as a photosensitizer in 1966. ...
UV-photolysis of Fe(CO)5 produces Fe2(CO)9, not Fe3(CO)12. The usual synthesis of Fe3(CO)12 starts with the reaction of Fe(CO)5 ... Ten of the CO ligands are terminal and two span an Fe---Fe edge, resulting in C2v point group symmetry. By contrast, Ru3(CO)12 ... resulting in equivalencing all 12 CO groups. Overall, it can be appreciated that these three clusters formally arise from ... with base: 3 Fe(CO)5 + (C2H5)3N + H2O → [(C2H5)3NH][HFe3(CO)11] + 3 CO + CO2 followed by oxidation of the resulting hydrido ...
PhotolysisEdit. Photolysis, i.e., photochemical decomposition is a chemical reaction where the compound is broken down by the ... As a result of UV light, the substrate material supplies hydrogen to the colourant molecules, reducing the colorant molecule. ... These processes result in both fading of the colorant and strength loss of the substrate.[7] ... The oxygen atom and the superoxide radical resulting from the reaction are both highly reactive and capable of destroying the ...
... serves as a substrate for photolysis resulting in the generation of diatomic oxygen (O2). This is the process which returns ... Photolysis is part of the light-dependent reactions of photosynthesis. The general reaction of photosynthetic photolysis can be ... In addition, photolysis is the process by which CFCs are broken down in the upper atmosphere to form ozone-destroying chlorine ... Photolysis occurs in the atmosphere as part of a series of reactions by which primary pollutants such as hydrocarbons and ...
In shallow waters, PCP is also quickly removed by photolysis. In deep or turbid water processes such as sorption and ... Releases to the environment are decreasing as a result of declining consumption and changing use methods. However, PCP is still ... After PCP is released into the atmosphere it decomposes through photolysis. The main biodegradative pathway for PCP is ... This process does not result in complete chlorination and commercial PCP is only 84-90% pure. The main contaminants include ...
Absorption of light at wavelengths shorter than about 400 nm results in photolysis (to form NO + O, atomic oxygen); in the ... This may be a result of the "hygiene hypothesis" or "western lifestyle" that captures the notions of homes that are well ... Outdoors, NO 2 can be a result of traffic from motor vehicles. Indoors, exposure arises from cigarette smoke, and butane and ... Additionally, because home insulation is improving, this can result in greater retention of indoor air pollutants, such as (NO ...
... as a result of the oxidation of methyl groups, reduction of nitro groups, and dimer formation." Evidence of the photolysis of ... Photolysis was more rapid in river water than in distilled water. Ultimately, photolysis affects the fate of TNT primarily in ... Photolysis is a major process that impacts the transformation of energetic compounds. The alteration of a molecule in ... Control of nitrogen oxides in feed nitric acid is very important because free nitrogen dioxide can result in oxidation of the ...
Uranium azide photolysis results in C-H bond activation and provides evidence for a terminal uranium nitride. Nature Chemistry ... Increased thermal conductivity results a lower thermal gradient between inner and outer sections of the fuel, potentially ...
After hearing a lecture on the subject of Lovelock's results, Sherwood and Molina embarked on research that resulted in the ... The damage caused to the ozone layer by the photolysis of CFCs was later discovered by Sherwood Rowland and Mario Molina. ... as a result of global warming, "billions of us will die and the few breeding pairs of people that survive will be in the Arctic ... First formulated by Lovelock during the 1960s as a result of work for NASA concerned with detecting life on Mars, the Gaia ...
These triazenes (ArN=NNH-CH2R) result from coupling of aromatic diazonium salts with primary amines but the reaction type is ... Diazo compounds are used as precursors to carbenes, which are generated by thermolysis or photolysis, for example in the Wolff ...
When reductive elimination occurs from odd coordination number complexes, the resulting intermediate occupies a nonbonding ... photolysis/oxidation. Additionally, because reductive elimination and oxidative addition are reverse reactions, any sterics or ... electron-poor metal centers undergo reductive elimination faster than electron-rich metal centers since the resulting metal ...
Along its path an optically induced chemical process is initiated, resulting in the creation of a new chemical species or in ... Elenbaas, Thijs (2005). Writing lines in turbulent air using Air Photolysis and Recombination Tracking (PDF). Eindhoven: ... It is based on photo-dissociation of water vapor followed by visualisation of the resulting OH radical using LIF. HTV has been ...
The curious result was activation on photolysis by a meta nitro group in contrast to the usual activation by ortho and para ...
As a result, such reactions do not appear to obey the one quantum-one molecule reactant relationship. The law is further ... high-intensity light sources such as those used in flash photolysis and in laser experiments are known to cause so-called ... When mercury vapor is mixed with ethylene, and the compound is irradiated with a mercury lamp, this results in the ...
It is the cleavage of one or several chemical bonds resulting from exposure to high-energy flux. The radiation in this context ... is associated with ionizing radiation; radiolysis is therefore distinguished from, for example, photolysis of the Cl2 molecule ... The yield of hydrogen resulting from the irradiation of water with β and γ radiation is low (G-values = ... to prevent coolant loss resulting from corrosion. The current interest in nontraditional methods for the generation of hydrogen ...
However, through other photolysis experiments have resulted in the formation of a CN radical through acetyl cyanide decomposing ...
Chalking results from the degradation of the binding material resulting in a release of the TiO2 pigment particles. These ... Ozone is produced by short wavelength (110 nm - 220 nm) UV photolysis of oxygen in the upper atmosphere. The photochemical ... This cascade effect results in an auto-acceleration of the weathering process, and may partially account for the general non- ... It results from the effects of solar radiation in combination with oxygen. Oxygen can promote degradation in several ways. Free ...
... unwanted photolysis and light attenuation; both being significant problems with a photolysis system. The idea of ... In addition, short bursts of stimulation allow results similar to the physiological norm. The steps of photostimulation are ... In most cases, photo-uncaging is the technique revealing the active region of a compound by the process of photolysis of the ... To uncage molecules, a photolysis system is required to cleave the covalent bond. An example system can consist of a light ...
It is not clear if he ever published any of these results in the primary scientific literature. K. A. Wilde submitted a paper ... Synthesis of organic compounds from carbon monoxide and water by UV photolysis Origins of Life. December 1978, Volume 9, Issue ... More recent results may question these conclusions. The University of Waterloo and University of Colorado conducted simulations ... Miller states that he made "A more complete analysis of the products" in the 1953 experiment, listing additional results. A. ...
Photolysis of heptanal in conditions resembling atmospheric conditions results in the formation of 1-pentene and acetaldehyde ... Photolysis of Heptanal Suzanne E. Paulson, De-Ling Liu, Grazyna E. Orzechowska, Luis M. Campos, and K. N. Houk J. Org. Chem.; ... Abuin, E.B.; Encina, M.V.; Lissi, E.A. (1972). "The photolysis of 3-pentanone". Journal of Photochemistry. 1 (5): 387-396. doi: ... The Norrish reaction has been studied in relation to environmental chemistry with respect to the photolysis of the aldehyde ...
Cations are positive ions missing one or more electrons, resulting in a net positive charge. Some commercial air purifiers are ... "Production of isotopically heavy ozone by ultraviolet light photolysis of O2". Geophysical Research Letters. 14 (6): 624-627. ... an unexpected result. Positive and negative ions produced by air conditioning systems have also been found by a manufacturer to ...
Results. The products formed were hexaBDEs to nonaBDEs, monoBDFs to pentaBDFs, and methoxylated tetraBDFs to pentaBDFs. The ... Chemical reactivity Photolysis Polybrominated dibenzofurans PBDFs Polybrominated diphenyl ethers PBDEs UV degradation ... Photolysis of decaBDE yields a wide span of products, from nonaBDEs to hydroxylated bromobenzenes. It is evident that ... It is notable that OH-PBDFs have not been identified or indicated in any of the photolysis studies performed to date. Formation ...
3. Results. Reflection-Diffuse Spectrum. The absorption spectrum of mesotrione in aqueous solution at shows an intense band ... All the results are gathered in Table 2. The percentage of moisture was increased by adding 100 µL of pure water at the surface ... Clay and Soil Photolysis of the Pesticides Mesotrione and Metsulfuron Methyl. Marie Siampiringue,1 Pascal Wong Wah Chung,1,2 ... They result from the hydrolysis of the group at the bridge moiety as observed in aqueous solutions [29]. 2-CB and AMMT appeared ...
Olefin rearrangement resulting from the gas-phase KrF laser photolysis of Cr(CO)6 . Journal of the American Chemical Society. ... Olefin rearrangement resulting from the gas-phase KrF laser photolysis of Cr(CO)6 . / Tumas, William; Gitlin, Barbara; Rosan, ... Fingerprint Dive into the research topics of Olefin rearrangement resulting from the gas-phase KrF laser photolysis of Cr(CO)6 ... Tumas, W, Gitlin, B, Rosan, AM & Yardley, JT 1982, Olefin rearrangement resulting from the gas-phase KrF laser photolysis of ...
CHEMICAL EFFECTS OF NUCLEAR TRANSFORMATIONS, FLASH HEATING, OR FLASH PHOTOLYSIS. Final Report, January 1--September 30, 1969. ... Results: 1 - 24 of 2,070 next Results as a List of Thumbnails and Descriptive Information Results as a Grid of Images Print ... Our results indicate that the number of damage sites induced by 1053-nm light scales with pulse duration ({tau}) as ({tau}{sub ... The experimental results reported here provide new data regarding the evaporation kinetics of sodium and potassium from a ...
The resulting constructions absorb light well into the visible light spectrum. These sensitizers are soluble ih organic ... PROPENONE SENSITIZERS FOR THE PHOTOLYSIS OF ORGANIC HALOGEN COMPOUNDS This invention relates to a new class of sensitizers for ... In still another application jthe photoproduced acid is used to effect the bleaching of dyes, resulting in high resolution ... Try the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.. ...
Results are given in FIG. 11. . The compound stayed inactive until the photolysis occurs. After the cleavage of the light- ... The results of this example are in good agreement with that of Example 4.A.2. and 4.A.3. In those cases, channels that were ... On the other hand, if the pH of the environment is low after the photolysis of the light-sensitive part, then, compound B (Q1[R ... Resulting solution was poured into 200 ml of ether, precipitated solid was filtered, washed with ether and dried in vacuo. In ...
Occupational hygiene results were all within normal limits.. Occupational Medicine, Feb. 1993, Vol.43, No.1, p.27-31. 15 ref.. ... Photolysis products did not cause skin allergies and had no effect on workers immunologic reactivity or peripheral blood ... Results showed that 43% were exposed to 8-hr time-weighted average (TWA) noise exposures of 85dBA or greater and that 14% were ... Results of this study indicate that many workers in the printing industry may be at risk of occupational hearing loss. Further ...
Description: Article on discharge-flow/chemiluminescence and flash-photolysis/resonance fluorescence studies of the reaction O ... Results: 1 - 24 of 29 next Results as a List of Thumbnails and Descriptive Information Results as a Grid of Images Print This ... UNT College of Arts and Sciences - 29 Matching Results Search Results Your Search Terms: Other Search Options Toggle Dropdown * ... Result Page Keep up to Date with an RSS feed of results matching your query. ...
This is called photolysis of water. *Photolysis of water results in the formation of oxygen and hydrogen. The oxygen is ... State that ATP and hydrogen (derived from photolysis of water) are used to fix carbon dioxide to make organic molecules. ... State that light energy is used to split water molecules (photolysis) to give oxygen and hydrogen and to produce ATP ... Denaturation: A structural change in a protein that results in a loss of its biological properties. This can be caused by pH or ...
Photolysis was a strong OH formation mechanism for high NO, NO2, and HONO settings, but SCI/NO2 reactions weakly generated NO3 ... VOC oxidation rates increased with air exchange, outdoor O3, NO2 and D-limonene sources, and indoor photolysis rates; and they ... the photolysis of nitrous acid (HONO) indoors to generate OH and (ii) the reaction of stabilized Criegee intermediates (SCI) ...
Photolysis.,medicine,medical supply,medical supplies,medical product ... YAG photolysis system,The ARC Laser MISC combines a pharo unit + Lyla laser module = ... representing an overall donation result ... ... Photolysis.. Info. A.R.C. Laser. Customer Service: +49-911- ... Dodick Nd:YAG photolysis system. Features. *"MICS" (microincisioncataractsurgery) (1,4mm / 1,2mm in pipeline) * ...
The resulting azides were subjected to photolysis in aqueous solution. The spectral and photochemical characteristics of azides ...
Flash-photolysis (1) * Fuel Cells (1) * Hybrid (1) * Inner phase (1) * LiBPO4 (1) ...
Washida, N.; Inoue, G.; Suzuki, M.; Kajimoto, O., Vacuum UV photolysis of NH3: rotational distribution of NH(c1«PI») and the ... Suzuki, E.; Watanabe, O.; Happoya, A.; Watari, E., Photolysis of 2-methylthietane and 2,4-dimethylthietane in argon matrices: ...
The rapid photolysis and reformation of ozone heats the stratosphere resulting in a temperature inversion. This increase of ... Ozone (O3) photolysis produces O and O2. The oxygen atom product combines with atmospheric molecular oxygen to reform O3, ... The increase of temperature with altitude is a result of the absorption of the Suns ultraviolet radiation by the ozone layer. ... Stratospheric warming of the polar vortex results in its weakening. When the vortex is strong, it keeps the cold, high pressure ...
This would result in a photoelectrochemical cell that produces pure hydrogen and oxygen from water and sunlight. ... photolysis. The photochemical reaction of light present in the decomposition of a substance.. photonics. The technology of ... A team of Australian and American researchers have now developed a way to split water molecules using light, or photolysis. ... Featuresoxidationphotocatalystphotocatalystsphotolysisphotonicsphotooxidationphotosynthetic organismsprotonsRobin Brimblecombe ...
Results. Flash Photolysis of Caged Calcium in Combination with Capacitance Measurements. Flash photolysis of caged calcium has ... 4 B). These results suggest that flash photolysis of caged calcium taps the same pool of membrane as calcium influx through ... Flash Photolysis of Caged Ca2+ and [Ca2+]i Measurements. For measurement of [Ca2+]i, alternating excitation at 345 and 390 nm ... 1992) Rate of release of Ca2+ following laser photolysis of the DM-nitrophen-Ca2+Complex. Biochemistry 31:8856-8861, pmid: ...
Zaborowski, Leon M.; Shreeve, Jeanne M., Photolysis of tetrafluorohydrazine and thiocarbonyl chloride. Preparation of ...
We have also developed a Teflon valve to control a pressure inside the photolysis cell. As a result, a conversion efficiency of ... We have also used a photolysis cell of which wall was coated with reflective aluminum to increase the photolysis rate in the ... The UV Photolysis system to convert NO_2 into NO is the key of the instrument, beause the NO detection system has been already ... A development of photolysis system for NO_2 measurement on board the aircraft. Research Project ...
17results). All Other All Publications * [Publications] Emoto,Y.: Tension relaxation induced by pulse photolysis of caged ATP ... By pulse-photolysis of caged nucleotides in TNP-ADP labelled fibers in rigor we have established that : (1), on binding ATP and ... Publications] Kagawa,K.: BDM compared with Pi and low Ca2+ in the cross-bridge reaction initiated by flash photolysis of caged ... Publications] Kagawa,K.: BDM compared with Pi and low Ca2+ in the cross-bridge reaction initiated by flash photolysis of caged ...
All absences from practical sessions must be validated and unexcused absences will result in failure of the module. Repeat year ... Flash Photolysis - Benzophenone Photochemistry • Numerical Modelling and Kinetics Where the theory underlying the experiments ... Present the results of a practical investigation in a concise and clear manner. ... Interpret data from an experiment, including applying the results to relevant theoretical models and thoroughly evaluating the ...
9. Application of Laser Photolysis to the Study of Reactive Intermediates Turro, Nicholas J.; Aikawa, Masayuki; Butcher, Jared ... Search Results. 1. Favorskii rearrangement of some α-Bromo-ketones Turro, Nicholas J.; Gagosian, Robert B.; Rappe, Christoffer ... Number of results to display per page 50 per page *10 per page ... Mechanistic Investigation of the Deep UV Photolysis of ...
These photochemical results are of major tropospheric relevance for understanding the formation and growth of secondary organic ... Thus, herein we investigate the photolysis (λ ≥ 305 nm) of 10-200 mM PA at pH 1.0 in water covering the relevant range 0 ≤ [O2( ... the carbon centered radicals are produced with photolysis rates of J. [. P. A. ]. 0. [. P. A. ]. 0. =. I. 0. ×. ε. λ. ×. [. P. ... The results in Figure 1 clearly reflect a variation for the limited mass transfer of O2(g) to the solution. Remarkably, the ...
Experimental procedures and additional nanosecond laser flash photolysis results are presented in the Supplementary Information ... By employing laser flash photolysis we are able to induce triplet energy transfer to \(\upbeta \)-carotene and oxygen. A ... rate constants of triplet decay and rate constant of anthracene triplet sensitization by laser flash photolysis of astaxanthin ...
  • The NP-EGTA salt can be complexed with Ca 2+ to generate a caged Ca 2+ reagent that will rapidly deliver Ca 2+ upon photolysis ( Figure 19.8.1 ). (thermofisher.com)
  • During the fading colourant molecules undergo various chemical processes which result in fading. (wikipedia.org)
  • Atmospheric emissions result from volatilization of the chemical during manufacturing and formulation, from soil and vegetation resulting from its use as an insecticide and acaricide or from drift during pesticide application or careless mixing and cleanup procedures during or after application. (cdc.gov)
  • Any evolution of water is result of chemical reactions with the Sun's atmosphere and the comet's body. (thunderbolts.info)
  • Our results establish that the structural basis of the low affinity of the T state is radically different between the subunits, because of differences in the packing and chemical tension at the hemes. (rcsb.org)
  • The new sensors - the Vernier Flash Photolysis Spectrometer, Pressure Sensor 400, and Platinum-Cell Conductivity Probe - offer instructors and students greater versatility for conducting laboratory investigations. (thefreedictionary.com)
  • The Vernier Flash Photolysis Spectrometer is an affordable option available to instructors to help students get hands-on experience with this important technique. (vernier.com)
  • The loss of the absorbance at 600 nm observed by the Vernier Flash Photolysis Spectrometer gives students the opportunity to follow the progress of a thermal cis-trans isomerization and measure its rate on timescales that cannot be achieved by traditional mixing methods. (vernier.com)
  • These processes result in both fading of the colorant and strength loss of the substrate. (wikipedia.org)
  • The AOP showed a higher deleterious potential for G. duodenalis cysts than either peroxidation (H 2 O 2 ) or photolysis (UV) processes alone. (hindawi.com)
  • This document summarizes the results and findings of a preliminary, pilot research study implemented to begin to elucidate the emissions and processes responsible for the formation and accumulation of ground-level O3 in Hong Kong, and lay the ground-work for a more extensive and comprehensive follow-on study. (issuu.com)
  • As a result of UV light, the substrate material supplies hydrogen to the colourant molecules, reducing the colorant molecule. (wikipedia.org)
  • Typical reactions that result in water formation are the burning of hydrogen or many other hydrocarbons in air itself or in combination with oxygen or other oxidisers. (thunderbolts.info)
  • Therefore, Hydrocarbons, C14-C20, aliphatics (≤2% aromatics) do not have the potential to undergo photolysis in soil, and this fate process will not contribute to a measurable degradative loss of these substances from the environment. (europa.eu)
  • Therefore, this substance does not have the potential to undergo photolysis in water and soil, and this fate process will not contribute to a measurable degradative loss of this substance from the environment. (europa.eu)
  • Provided molecular level understanding as to why nitrate photolysis rates on urban grimes, particles, and other surfaces are so much faster than those in the liquid phase. (wadsworth.org)
  • Photolysis was a strong OH formation mechanism for high NO, NO2, and HONO settings, but SCI/NO2 reactions weakly generated NO3 except for only a few cases. (cdc.gov)
  • Demonstrated the importance of 2-nitrophenol gas phase photolysis in forming OH and HONO in the polluted, VOC-rich atmospheric environment. (wadsworth.org)
  • The vertical yellow line (arrow) indicates the region scanned repetitively to generate the line-scan image shown in panel B. B) Two precisely localized Ca 2+ transients were elicited by two-photon photolysis of DMNP-EDTA ( D6814 ) using ultrafast high-repetition (120 fs, 80 MHz) laser pulses at 700 nm. (thermofisher.com)
  • The increase of temperature with altitude is a result of the absorption of the Sun's ultraviolet radiation by the ozone layer. (wikipedia.org)
  • Ozone (O3) photolysis produces O and O2. (wikipedia.org)
  • The photon energy of UVA -radiation which is not absorbed by atmospheric ozone exceeds the dissociation energy of the carbon-carbon single bond , resulting in the cleavage of the bond and fading of the color. (wikipedia.org)
  • Some ozone is naturally occurring, but pollution causes ozone through photolysis of NO2 in the presence of VOCs. (chron.com)
  • NO2 photolyzes into NO and O, and the resulting free oxygen atom combines with an oxygen molecule O2 to make ozone (O3). (chron.com)
  • While much of this DON is not available in soil, it can be subsequently transformed in freshwaters by UV photolysis into biologically available forms of N and hence contribute to eutrophication. (thefreedictionary.com)
  • This paper presents results of theoretical and experimental investigation of this problem including multi-modal structure of mine's vibration response, effect of burial depth and soil condition. (spie.org)
  • Many of "these known sensitizers contain a basic group, such as dimethylamino, which chemically reacts with the organic halogen compound, resulting in a reduction in or loss of photosensitivity, e.g. premature acid formation. (google.ca)
  • The inhibition of this enzyme prevents fatty acid formation and the lack of lipids results in loss of cell integrity of membranes and no new growth. (intechopen.com)
  • The quantum yield of formation of methane = 0.09 ± 0.01 and was further corroborated by a simple measurement of pressure changes following the photolysis. (ias.ac.in)
  • and Fe(II), resulting in the formation of a strongly fluorescent 2-hydroxyterephthalate (HTP). (nii.ac.jp)
  • It has been suggested that chloramination of surface waters with a high concentration of dissolved organic carbon (DOC) could result in elevated NDMA formation. (scielo.org.za)
  • UV photolysis causes the formation of two different photoproducts. (rice.edu)
  • Publications] Emoto,Y.: 'Tension relaxation induced by pulse photolysis of caged ATP in partially crosslinked fibers from rabbit psoas muscle. (nii.ac.jp)
  • Publications] Yumiko Emoto, Keisuke Horiuti, Katsuhisa Tawada and Kazuhiro Yamada: 'Tension relaxation induced by pulse photolysis of caged ATP in partially crosslinked fibers from rabbit psoas muscle. (nii.ac.jp)
  • Flash photolysis is a pump-probe laboratory technique, in which a sample is firstly excited by a strong pulse (called pump pulse) of light from a laser of nanosecond, picosecond, or femtosecond pulse width or by a short-pulse light source such as a flash lamp. (wikipedia.org)
  • Thus, photolysis of DMNP-EDTA complexed with Ca 2+ results in a pulse of free Ca 2+ . (thermofisher.com)
  • Our model suggests that the mixing ratios of sulphur oxides are at least five times higher above 90 km when the photolysis of sulphuric acid is included. (nature.com)
  • Absolute H atom quantum yield, $\phi_H = (0.39 \pm 0.09)$ was determined by calibration method in which CH 4 photolysis at 121.6 nm was used as a reference source of well-defined H atom concentrations. (ias.ac.in)
  • These results indicate that the composition of the SNARE complex and its interaction with modulatory molecules drives priming and provides a molecular basis for different pools of releasable vesicles. (frontiersin.org)
  • The collision-free, room temperature gas-phase photodissociation dynamics of CH 3 CFCl 2 (HCFC-141b) was studied using Lyman-𝛼 laser radiation (121.6 nm) by the laser photolysis/laserinduced fluorescence `pump/probe' technique. (ias.ac.in)
  • These results suggest a major role for MgATP in preparing synaptic vesicles for fusion, but indicate that cytosolic MgATP may have little role in events downstream of calcium entry, provided that [Ca 2+ ] i near release sites is elevated above ≈30 μM. (rupress.org)
  • This sequence of steps, ATP-dependent priming preceding calcium-dependent fusion, is supported by the results of several studies in which the photolyzable calcium chelator DM-nitrophen was used to elevate internal calcium. (rupress.org)
  • Here we present simulations of the fate of sulphuric acid in the Venusian mesosphere based on the Caltech/JPL kinetics model 3 , 10 , but including the photolysis of sulphuric acid. (nature.com)
  • These resulting solid-phase arrays are useful, for example, to assay for the presence of biochemical products in biological samples. (google.com)
  • Photolysis of decaBDE yields a wide span of products, from nonaBDEs to hydroxylated bromobenzenes. (springer.com)
  • 2005).Production and usage of products containing parabens can result in their release to the environment through various waste streams. (cdc.gov)
  • The end result is the same as photolysis, but light is not thought to be involved in the process. (thefreedictionary.com)
  • The resulting hydrogel composed of physically self-assembled CarH C polymers exhibited a rapid gel-sol transition on light exposure, which enabled the facile release/recovery of 3T3 fibroblasts and human mesenchymal stem cells (hMSCs) from 3D cultures while maintaining their viability. (pnas.org)
  • We show that the resulting insulin trimer is highly insoluble, but can be milled into injectable particles that release insulin only in response to light from a 406 nm light source. (stanford.edu)
  • was irradiated with laser light emitted from the test device, resulting in substantial reduction of the colony forming unit of the bacteria within a short time as 2 min. (nii.ac.jp)
  • Compared with P25, TNT had much higher specific surface area and surface acidity, resulting in higher Pd dispersion on the catalyst support. (chemweb.com)
  • As an alternative to solely monitoring Ca 2+ changes using fluorescent indicators, scientists may want to rapidly raise or lower the intracellular Ca 2+ concentration and study the physiological response that results. (thermofisher.com)
  • Chemicals such as pesticides can be introduced into the environment as a result of their application for plant protection. (hindawi.com)