Chemical reactions effected by light.
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.

Control of nanopore wetting by a photochromic spiropyran: a light-controlled valve and electrical switch. (1/510)

By modifying the surface of nanoporous alumina membranes using mixtures of a photochromic spiropyran and hydrophobic molecules, it is possible to control the admission of water into the membrane using light. When the spiropyran is in the thermally stable, relatively hydrophobic closed form, the membrane is not wet by an aqueous solution. Upon exposure to UV light, the spiropyran photoisomerizes to the more polar merocyanine form, allowing water to enter the pores and cross the membrane. Thus, the photosensitive membrane acts as a burst valve, allowing the transport of water and ions across the membrane. If the aqueous solution contains ions, then the membrane acts as an electrical switch; photoisomerization leads to a two-order-of-magnitude increase in ionic conductance, allowing a current to flow across the membrane. Exposure to visible light causes photoisomerization of the merocyanine back to the closed, spiro form, but dewetting of the membrane does not occur spontaneously, due to a high activation barrier.  (+info)

Effect of initiator on photopolymerization of acidic, aqueous dental model adhesives. (2/510)

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Importance of hydrogen-bonding sites in the chiral recognition mechanism between racemic D3 terbium(III) complexes and amino acids. (3/510)

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Site-specific modification by functionality-transfer oligonucleotide with the photo-inducible reactivity. (4/510)

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RNA aptamers that reversibly bind to photoresponsive peptide. (5/510)

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A diazirine-based nucleoside analogue for efficient DNA interstrand photocross-linking. (6/510)

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Structural analysis of the Mn(IV)/Fe(III) cofactor of Chlamydia trachomatis ribonucleotide reductase by extended X-ray absorption fine structure spectroscopy and density functional theory calculations. (7/510)

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UV-Vis spectrophotometric analysis and light irradiance through hot-pressed and hot-pressed-veneered glass ceramics. (8/510)

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Photochemical processes refer to chemical reactions that are initiated or driven by the absorption of light. In these reactions, photons (light particles) interact with molecules, causing electrons in the molecules to become excited and leading to the formation of new chemical bonds or the breaking of existing ones. This results in the creation of different molecular structures or products.

In the context of human health and medicine, photochemical processes can occur both naturally and artificially. For instance, the body uses light-dependent reactions in the process of vision, where light is absorbed by rhodopsin in the retina, triggering a series of chemical events that ultimately lead to visual perception.

Additionally, photochemotherapy is a medical treatment that utilizes photochemical processes to achieve therapeutic effects. In this approach, a photosensitizing agent is administered to a patient, and then exposed to specific wavelengths of light. The light causes the photosensitizer to react with oxygen, generating reactive oxygen species that can destroy targeted cells or tissues, such as cancer cells or bacteria.

Overall, photochemical processes play an essential role in various biological and medical contexts, enabling critical functions like vision and offering promising therapeutic avenues for a range of conditions.

In the context of medical terminology, "light" doesn't have a specific or standardized definition on its own. However, it can be used in various medical terms and phrases. For example, it could refer to:

1. Visible light: The range of electromagnetic radiation that can be detected by the human eye, typically between wavelengths of 400-700 nanometers. This is relevant in fields such as ophthalmology and optometry.
2. Therapeutic use of light: In some therapies, light is used to treat certain conditions. An example is phototherapy, which uses various wavelengths of ultraviolet (UV) or visible light for conditions like newborn jaundice, skin disorders, or seasonal affective disorder.
3. Light anesthesia: A state of reduced consciousness in which the patient remains responsive to verbal commands and physical stimulation. This is different from general anesthesia where the patient is completely unconscious.
4. Pain relief using light: Certain devices like transcutaneous electrical nerve stimulation (TENS) units have a 'light' setting, indicating lower intensity or frequency of electrical impulses used for pain management.

Without more context, it's hard to provide a precise medical definition of 'light'.

The process has not been commercialized. Photochemical reduction involves chemical reduction (redox) generated from the ... The reduction process begins with excitation of the photosensitizer, as mentioned. This causes the movement of an electron from ... The advantage of dividing the two processes among different centers is in the ability to tune each center for a particular task ... Photochemical reduction of carbon dioxide harnesses solar energy to convert CO2 into higher-energy products. Environmental ...
In most photochemical reactions the primary process is usually followed by so-called secondary photochemical processes that are ... The photochemical equivalence law applies to the part of a light-induced reaction that is referred to as the primary process (i ... The law is further restricted to conventional photochemical processes using light sources with moderate intensities; high- ... Photoelectrochemical processes are processes in photoelectrochemistry; they usually involve transforming light into other forms ...
Melchiorre, Paolo (2022). "Introduction: Photochemical Catalytic Processes". Chemical Reviews. 122 (2): 1483-1484. doi:10.1021/ ... The production of ammonia is one of the largest-scale and most energy-intensive processes. In the Haber process nitrogen is ... Most carbonylation processes require metal catalysts, examples include the Monsanto acetic acid process and hydroformylation. ... In 2005, catalytic processes generated about $900 billion in products worldwide. Catalysis is so pervasive that subareas are ...
A general photochemical process". Journal of the American Chemical Society. 89 (15): 3932-3933. doi:10.1021/ja00991a064. ISSN ... In organic chemistry, the di-π-methane rearrangement is the photochemical rearrangement of a molecule that contains two π- ... short-circuiting the di-π-methane process. Singlet excited states do not rotate and may thus undergo the di-π-methane mechanism ...
... (PCM), also known as photochemical milling or photo etching, is a chemical milling process used to ... Photochemical machining is a form of photo engraving, and a similar process in microfabrication is called photolithography. The ... photochemical machining gains greater economic advantage over sequential processes such as CNC punching, laser or water-jet ... This process emerged in the 1960s as an offshoot of the printed circuit board industry. Photo etching can produce highly ...
Franck's first paper there, co-authored with Edward Teller, was on photochemical processes in crystals. Hans Gaffron became his ... 8-9. Franck, J. (1926). "Elementary processes of photochemical reactions". Transactions of the Faraday Society. 21: 536-542. ... the process by which plants use light to convert carbon dioxide and water into more organic compounds. Biological processes ...
Franck, J. (1926). "Elementary processes of photochemical reactions". Transactions of the Faraday Society. 21: 536-542. doi: ... "Elementary processes of photochemical reactions". Transactions of the Faraday Society. 21: 536-542. doi:10.1039/tf9262100536. ...
A General Photochemical Process" (PDF). J. Am. Chem. Soc. 89 (15): 3932-3933. doi:10.1021/ja00991a064. Wang, C.; Yuan, J.; Li, ... This pattern is consistent with an exchange process whose rate k is close to the frequency separation of the four contributing ... In 1966 W. von Eggers Doering and Joel W. Rosenthal synthesized it by the photochemical rearrangement of cis-9,10- ... magnetic resonance spectroscopy as techniques for the quantitative investigation of dynamic processes. The Cope rearrangement ...
"Methyl Ethyl Ketone Photochemical Processes". Journal of the American Chemical Society. 72 (6): 2810-2811. doi:10.1021/ ... The Norrish type I reaction is the photochemical cleavage or homolysis of aldehydes and ketones into two free radical ... A Norrish type II reaction is the photochemical intramolecular abstraction of a γ-hydrogen (a hydrogen atom three carbon ... A Norrish reaction in organic chemistry is a photochemical reaction taking place with ketones and aldehydes. Such reactions are ...
Lewis, Gilbert N.; Lipkin, David; Magel, Theodore T. (November 1941). "Reversible Photochemical Processes in Rigid Media. A ... The above holds for χ ( 2 ) {\displaystyle \chi ^{(2)}} processes. It can be extended for processes where χ ( 3 ) {\ ... In these processes, the medium has a linear response to the light, but the properties of the medium are affected by other ... The power for this comes from the two pump beams, which are depleted by the process. The frequency of the conjugate wave can be ...
The process can be divided into four stages: Initiation the process of generating the initial free radical. Propagation the ... Tyler, David R. (30 December 2004). "Mechanistic Aspects of the Effects of Stress on the Rates of Photochemical Degradation ... In textiles the process is called phototendering. Technologies have been developed to both accelerate and inhibit this process ... The photo-oxidation process at aliphatic sites is similar to that seen for polyolefins, with the formation of hydroperoxide ...
Lelieveld, J.; Crutzen, P. J. (1990). "Influences of cloud photochemical processes on tropospheric ozone". Nature. Springer ... "Influences of cloud photochemical processes on tropospheric ozone", Nature (in German), 343 (6255), pp. 227-233, Bibcode: ... Also developing computer models to simulate the interactions of chemical and meteorological processes, and investigating the ... to uncover the photochemical reaction chains. He and his group have specialized in the construction of new instrumentation for ...
Photosystem I (PSI) and photosystem II (PSII) work synergistically; through photochemical processes PSII transports electrons ... or transferring the energy to a plant process (photosynthesis). In plants, the photoreceptors cryptochrome and phototropin ...
These processes result in both fading of the colorant and strength loss of the substrate. Phototendering, i.e., photochemical ... A colorant molecule, when excited by a photon of sufficient energy, undergoes an oxidation process. In the process the ... Photolysis, i.e., photochemical decomposition is a chemical reaction where the compound is broken down by the photons. This ... Photosensitization, i.e., photochemical sensitization. Exposing dyed cellulosic material, such as plant-based fibers, to ...
The photochemical processes involved are complex but well understood. The key observation is that, ordinarily, most of the ... and in the cleaning processes of delicate electronic equipment. They also occur as by-products of some chemical processes. No ... This is a continuing process that terminates when an oxygen atom recombines with an ozone molecule to make two O 2 molecules. ... O + O 3 → 2 O 2 The total amount of ozone in the stratosphere is determined by a balance between photochemical production and ...
... s are made using a photochemical machining process. It starts out with a sheet of steel or invar alloy that is ... The process was used a total of three times, once for each color. (The shadow mask or aperture grille had to be removable and ... Shadow masks are made by photochemical machining, a technique that allows for the drilling of small holes on metal sheets. ... "Anti-doming composition for a shadow-mask and processes for preparing the same". Archived from the original on 15 September ...
"Photochemical processes and the environmental impact of petroleum spills". Biogeochemistry. 39 (2): 121-138. doi:10.1023/A: ... The combustion process of petroleum, coal and wood is responsible for increased occurrence of acid rain. Combustion causes an ... Emissions from the petroleum industry occur in every chain of the oil-producing process from the extraction to the consumption ...
The cleansing mechanism of UV is a photochemical process. Contaminants in the indoor environment are almost entirely organic ... Fast processes such as flexo or offset printing require high-intensity light focused via reflectors onto a moving substrate and ... The effectiveness of such a process depends on the UV absorbance of the juice. Pulsed light (PL) is a technique of killing ... Most UV-induced pyrimidine dimers in DNA are removed by the process known as nucleotide excision repair that employs about 30 ...
1948; 47:91-93 The photochemical reduction process in photosynthesis. In Symposia of the Society for Experimental Biology. C. S ... The photochemical activity of isolated chloroplasts. C. S. French, H. W. Milner, M. L. Koenig, and F. D. H. Macdowall. Carn. ... While processing times are slow, taking 3-10 times longer than that in specialty shaking machines, it works well for easily ... Larger bead beater machines that hold deep-well microtiter plates also shorten process times, as do Bead Dispensers designed to ...
The tautomerization can also be catalyzed via photochemical process. These findings suggest that the keto-enol tautomerization ... Studies show that the tautomerization process is significantly inhibited at ambient temperatures ( kt ≈ 10−6 M/s), and the half ...
"Radiative and photochemical processes in mesospheric dynamics: Part I. Models for radiative and photochemical processes" (PDF ... The first of these, Part I: Models for Radiative and Photochemical Processes, was co-authored with his Harvard colleague and ... This formed the basis of his seminal Radiative and Photochemical Processes in Mesospheric Dynamics that was published in four ... 2.0.CO;2. Lindzen, Richard S (1966). "Radiative and photochemical processes in mesospheric dynamics. Part III. Stability of a ...
doi:10.1002/cber.191604901176 [2] (1917) About real photochemical processes. Zeitschrift für Physikalische Chemie, Volume 130U ... About the mechanism of photochemical polymerization of anthracene. Natural Sciences (1929) Photochemical to the theory of color ... Natural Sciences (1933) The Colloid Chemistry of Photoanisotrophy (1940) Photochemical Studies on Color Vision Berenblum and ... doi:10.1002/cber.190303601208 [1] (1905) About reversible photochemical reactions in the homogeneous system (1908) About ...
... can be synthesized only by a photochemical process. Its production from sterols would have started very early in the ... The process is faster in white button mushrooms.: fig. 3 Vitamin D3 is produced photochemically from 7-dehydrocholesterol in ... An unambiguous deactivation process". The Journal of Biological Chemistry. 261 (20): 9250-6. doi:10.1016/S0021-9258(18)67647-1 ... through a photochemical reaction of UVB light, from the sun exposure (specifically UVB radiation) or UVB lamps. Cholecalciferol ...
Thompson, Tracy L; Yates, John T (2006). "Surface science studies of the photoactivation of TiO2-new photochemical processes". ... and ozone-based AOP processes for industrial effluent treatment", Advanced Oxidation Processes for Effluent Treatment Plants, ... Chapter III Advanced Oxidation Processes. Munter, Rein (2001). "Advanced Oxidation Processes-Current Status and Prospects". ... Although oxidation processes involving ·OH have been in use since late 19th century (such as Fenton's reagent, which was used ...
Aside from electrolysis driven by photovoltaic or photochemical cells, several thermochemical processes have also been explored ... Solar chemical processes use solar energy to drive chemical reactions. These processes offset energy that would otherwise come ... The Solzinc process under development at the Weizmann Institute of Science uses a 1 MW solar furnace to decompose zinc oxide ( ... Solar induced chemical reactions can be divided into thermochemical or photochemical. A variety of fuels can be produced by ...
Rabinowitch, E (1936). "The collison [sic] mechanism and the primary photochemical process in solutions". Transactions of the ... to the sum of the rate constants for all cage processes. According to mathematical models, Fc is dependent on changes on ...
The print is then processed using traditional photochemical means (usually RA4). After which the photographic print is handled ... Whereas xerography and inkjet printing employ a halftone process and ink to reproduce digital images on paper, digital-C is a ... photographic continuous tone process rather than halftone or error diffusion which are common on offset press or ink-jet. The ...
The upper atmosphere - structure, composition, and dominant physical and photochemical processes. Sound propagation, aurora, ... Buettner, K. J. (1958). Sorption by the earth surface and a new classification of kata-hydrometeoric processes. Journal of ...
... the process is termed disrotatory. It was found that 4n-electron thermal and (4n + 2)-electron photochemical electrocyclic ... A pericyclic process involving N electron pairs and A antarafacial components is often favored under photochemical conditions ... represent examples of this type of pericyclic process. The ene reaction is often classified as a type of group transfer process ... In a photochemical reaction an electron in the HOMO of the reactant is promoted to an excited state leading to a reversal of ...
This low quantum yield means that other photochemical processes are also occurring. Studies have raised the issue that ... Photochemical and photophysical properties of sunscreens. Mueller SO; Kling M; Arifin Firzani P; et al. (April 2003). " ...
Photochemical processes occur when atomic nuclei and their electrons take on different configurations after absorbing a photon ... The findings could improve scientists understanding of light-driven processes such as photosynthesis, smog formation and ozone ... Quantum computing has provided new insights into a fundamental aspect of photochemical reactions that has previously proven ... Quantum computing offers new insight into photochemical processes Posted by Dan Breeden in categories: chemistry, computing, ...
A Novel Photochemical Machining Process for Magnesium Aerospace and Biomedical Microengineering Applications. 2010. D M Allen, ... wings or stents through a bespoke PCM process. This etching process differs significantly from the industrial etching process ... process. Experimentally, it has been demonstrated for the first time that metal wire widths of 0.15 mm can be achieved within a ... magnesium microcomponents with metal wire widths of the order of the metal thickness using a photochemical machining (PCM) ...
Spectral variety for photochemical reactions and microreactors for a selective and efficient reaction process ... UV light for photochemical processes. Many organic syntheses are substantially accelerated or made possible in the first place ... Photochemical processes can also be used with a specific purpose, e.g. to decompose pollutants or remove toxic substances. ... Fields of application of photochemical processes:. *Synthesis: Isomerisation, polymerisation, addition etc.. *Analysis: TOC ...
Photographic Processing , Photographic Chemicals , Photochemical Process , Photographic Film , Photographic Emulsion , Latent ... Photographic Processing , Photographic Chemicals , Photochemical Process , Photographic Film , Photographic Emulsion , Latent ... Photochemical , Process , Photochemistry , Silver Halide Photograph , Silver Bromide Photograph , Silver Aggregates Photograph ... Photochemical , Process , Photochemistry , Silver Halide Photograph , Silver Bromide Photograph , Silver Aggregates Photograph ...
Photo Chemical Process. Saturday 14 April - Monday 14 May 2012 ... a 160 year old photographic process using sunlight to capture ...
Synthesis of polymeric ionic liquids using a photochemical polymerization process. Name(s): The University of Toledo, assignee ...
Photochemical processes occur when atomic nuclei and their electrons take on different configurations after absorbing a photon ... The findings could improve scientists understanding of light-driven processes such as photosynthesis, smog formation and ozone ... Quantum computing has provided new insights into a fundamental aspect of photochemical reactions that has previously proven ... Quantum computing offers new insight into photochemical processes Posted by Dan Breeden in categories: chemistry, computing, ...
Oxidant and Particle Photochemical Processes above a South-East Asian tropical rain forest (OP3-1) Project was the first ground ... Oxidant and Particle Photochemical Processes above a South-East Asian tropical rain forest (OP3-1) Project. ...
Precision In The Photochemical Etching Process (infographic). Description: Source: https://metaletching.com/ ...
Versatile and nondestructive photochemical process for biomolecule immobilization. Langmuir : the ACS journal of surfaces and ... Versatile and nondestructive photochemical process for biomolecule immobilization. Pascal Viel, Justine Walter, Sophie Bellon, ... This simple process is also versatile and could be used for covalently binding a wide range of molecules such as polyethylene ... This process is based on a polyazidophenylene layer derived from the electroreduction of the parent salt 4- ...
Impacts of biomass burning and photochemical processing on the light absorption of brown carbon in the southeastern Tibetan ... Impacts of biomass burning and photochemical processing on the light absorption of brown carbon in the southeastern Tibetan ... Impacts of biomass burning and photochemical processing on the light absorption of brown carbon in the southeastern Tibetan ...
The process has not been commercialized. Photochemical reduction involves chemical reduction (redox) generated from the ... The reduction process begins with excitation of the photosensitizer, as mentioned. This causes the movement of an electron from ... The advantage of dividing the two processes among different centers is in the ability to tune each center for a particular task ... Photochemical reduction of carbon dioxide harnesses solar energy to convert CO2 into higher-energy products. Environmental ...
... photo etching process etching machine,photo chemical etching machine for etching process. ... Features:This double spray precision Plaque Etching & Engraving machines is Photochemical etching processing equipments. It Can ... this Plaque Etching & Engraving machines, photo chemical etching machine can be Photo etching process plaque ,nameplate,lable, ... application:this Plaque Etching & Engraving machines, photo chemical etching machine can be Photo etching process plaque , ...
Seán Crevan Ottewell is Chemical Processings Editor-at-Large. Seán earned his bachelors of science degree in biochemistry at ... Ball Mills Produce Photochemical Reactions. Seán Ottewell. May 22, 2023 Researchers replaced the large volume of toxic solvents ... Prior to joining Chemical Processing in 2012 he was editor of European Chemical Engineer, European Process Engineer, ... Processing Equipment. Design & SimulationFluid HandlingPowder & SolidsReaction & SynthesisSeparations TechnologyHeat Exchangers ...
Towards Sustainability: Photochemical and Electrochemical Processes Applied for Environmental Protection. View this Special ... Chemical Engineering and Processing: Process Intensification, vol. 101, pp. 87-100, 2016. ... P. K. Holt, Electrocoagulation: Unravelling and Synthesising the Mechanisms behind a Water Treatment Process, [Ph.D. thesis], ... However, the disadvantage of this process is that in Mexico, it could only be applied from 9:30 am to 4:00 p.m., since it is ...
An Effective Photochemical Process in the Treatment of Phenol, Nitrobenzene and Aniline. V Congreso de Fotoquímica. N: CO-Q15, ... The Effect of pH on the Kinetics of Advanced Oxidation Processes. VII Mediterranean Congress on Chemical Engineering. N: P.7.34 ... Coupled photochemical-biological system to treat biorecalcitrant wastewater. 4th. Int. Conf. on Oxidation Technologies for ... Efficiency of the Degradation of Phenolic Compounds by the Fe+2 /H2O2 Process. VIII Mediterranean Congress on Chemical ...
Photochemical Catalytic Processes". Chemical Reviews. 122 (2): 1483-1484. doi:10.1021/acs.chemrev.1c00993. PMID 35078320. S2CID ... The production of ammonia is one of the largest-scale and most energy-intensive processes. In the Haber process nitrogen is ... Most carbonylation processes require metal catalysts, examples include the Monsanto acetic acid process and hydroformylation. ... Food processing[edit]. One of the most obvious applications of catalysis is the hydrogenation (reaction with hydrogen gas) of ...
Novel intermolecular and intramolecular photochemical reactions initiated by excited state single electron transfer processes. ... Novel intermolecular and intramolecular photochemical reactions initiated by excited state single electron transfer processes. ... Novel intermolecular and intramolecular photochemical reactions initiated by excited state single electron transfer processes. ... Novel intermolecular and intramolecular photochemical reactions initiated by excited state single electron transfer processes. ...
Spectroscopic analysis suggests that PATagRFP photoactivation is a two-step photochemical process involving sequential one- ...
Contrast between the electrochemical, radiolytic, and photochemical reduction processes. J. Org. Chem. 71, 2870-2873 (2006). ... Anderson, C. P., Salmon, D. J., Meyer, T. J. & Young, R. C. Photochemical generation of Ru(bpy)3+ and O2-. J. Am. Chem. Soc. 99 ... Balzani, V. Photochemical molecular devices. Photochem. Photobiol. Sci. 2, 459-476 (2003). ... I agree my information will be processed in accordance with the Nature and Springer Nature Limited Privacy Policy.. ...
Photochemical upconversion of light with photon energy below the silicon bandgap has remained elusive, but the feat has now ... Photochemical upconversion is a strategy for converting infrared light into more energetic, visible light, with potential ... I agree my information will be processed in accordance with the Nature and Springer Nature Limited Privacy Policy.. ... Singlet oxygen mediated photochemical upconversion of NIR light. J. Phys. Chem. Lett. 2, 966-971 (2011). ...
... and revealed the effects of localized surface plasmon resonance of metal nanopaparticels on molecular photochemical processes ... Journal Article] Photochemical reaction of p-hydroxycinnamic-thiophenyl ester in the microcrystalline state2010. *. Author(s). ... Journal Article] Photochemical reaction of p-hydroxycinnamic-thiophenyl ester in the microcrystalline state2010. *. Author(s). ... Presentation] Acceleration of photochemical reaction near gold nanoparticle stuided by light scattering microspectroscope2010. ...
Photochemical mobilization of dissolved hydrocarbon oxidation products from petroleum contaminated soil into a shallow aquifer ... Reston Biogeochemical Processes in Groundwater Laboratory. The Reston Biogeochemical Processes in Groundwater Laboratory (RBPGL ... The Reston Biogeochemical Processes in Groundwater Laboratory (RBPGL) is assessing the potential risks to human and ecosystem ... The Reston Biogeochemical Processes in Groundwater Laboratory (RBPGL) is assessing the potential risks to human and ecosystem ...
AMINOETHYLGLYCINE-DERIVATIZED RUTHENIUM COMPLEXES: MODEL ARCHITECTURES FOR PHOTOCHEMICAL PROCESSES Graduate Program: Chemistry ... digital image processing. substrate-mediated interactions. real-time measurements. image analysis File: Download Brent_Mantooth ...
Invivo-study; Laboratory-animals; Analytical-methods; Ultraviolet-radiation; Photochemical-reactions; Analytical-processes; ...
Photochemical, Photobiological, & Thermochemical Conversion- (1980-). ... DOE Patents Patent: Reactor process using metal oxide ceramic membranes Title: Reactor process using metal oxide ceramic ... Reactor process using metal oxide ceramic membranes Patent Anderson, Marc A [Madison, WI] ... Anderson, M A. Reactor process using metal oxide ceramic membranes. United States: N. p., 1994. Web. ...
Woodblocks were no longer used by 1880, when photochemical processes replaced them. As a result, Nasts sketches looked harsh ... to a photochemical process which required him to execute his originals in pen and ink. This had a noticeably adverse impact on ... Nasts position was also affected by changes in the printing process. ... and angry because lines that had been softened by the engraving process were now more solid. Nast left the newspaper in 1886, ...
Researchers are presenting a new process that, in a single step, allows manufacture of conductive paths that are just a few ... For the new process, the developers use a process known as photochemical metallization: When a photoactive layer is irradiated ... Photochemical metallization allows the manufacture of touchscreens in a single step. (Nanowerk News) Research scientists at INM ... The research scientists at INM - Leibniz-Institute for New Materials are now presenting a new process that, in a single step, ...
  • Quantum computing has provided new insights into a fundamental aspect of photochemical reactions that has previously proven difficult to study. (lifeboat.com)
  • In addition to the conventional, long-proven reaction process in stirred tank reactors, chemical reactions are increasingly performed in microreactors, which enables even easier and more efficient implementation of photochemical reaction steps. (heraeus.com)
  • The carbon capture and conversion process uses a switchable dual-function material consisting of nanoparticles to perform reactions. (chemicalprocessing.com)
  • Dark Intermediate States in Photochemical Cis-Trans Isomerization and Pericyclic Reactions. (mpg.de)
  • On the atomic scale level, we can describe these photo-chemical reactions, through a multitude of elementary processes occurring on the ultrafast time scale (from sub femtosecond to picosecond) where the initial energy/light harvesting process is followed by energy conversion and transport processes. (lu.se)
  • Balzani, V. Photochemical molecular devices. (nature.com)
  • We have examined and revealed the effects of localized surface plasmon resonance of metal nanopaparticels on molecular photochemical processes by conventional and single particle spectroscopies. (nii.ac.jp)
  • Including the exploitation of previous results from EU funded projects, the goal of project RECOPHARMA is to design, develop, validate and demonstrate a novel process by sequential integration the potentials offered by Molecular Imprinted Polymers (MIPs), Reagentless Thermosorption (RTS), Nanocomposites Functional Materials, Advanced Oxidation Processes, for an effective treatment aiming the recovery of target recalcitrant CDs and degradation of corresponding transformation products or metabolites, working in a continuous operation mode. (europa.eu)
  • The formations of sulfate and nitrate on dust are studied along with the dust effects on the photochemical oxidant cycle for the long-range-transported particles with a diameter of 0.1-40 μ m. (ametsoc.org)
  • We aim at unravelling a complete picture of photophysical and photochemical processes in these systems. (lu.se)
  • Our research covers from synthesis (solution process and colloidal synthesis) and characterization (primarily by photochemical and photophysical measurements) to fabrication of eco-friendly, low-cost, and high-performance light-converting devices (primarily for solar cells and photoelectrochemical cells). (lu.se)
  • Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product, in the process of regenerating the catalyst. (wikipedia.org)
  • This article reports on a project in which silver decahedra were successfully synthesized with high yield via a photochemical reaction using blue light-emitting diodes (LEDs) as the exciting light source. (ojp.gov)
  • Photochemical reduction of carbon dioxide harnesses solar energy to convert CO2 into higher-energy products. (wikipedia.org)
  • Part 2 of this blog topic continues the discussion from last month of some important aspects of adsorption on activated carbon in the process industries and both parts are intended to serve as an introduction to the topic. (processengr.com)
  • The findings could improve scientists' understanding of light-driven processes such as photosynthesis, smog formation and ozone destruction. (lifeboat.com)
  • Examples of photochemical processes including photosynthesis, photography, solar energy conversation and atmospheric photochemistry. (bath.ac.uk)
  • Spectroscopic analysis suggests that PATagRFP photoactivation is a two-step photochemical process involving sequential one-photon absorbance by two distinct chromophore forms. (nih.gov)
  • Processes for site-selective, sequential functionalizations of carbohydrate derivatives are described. (acs.org)
  • Photochemical reduction involves chemical reduction (redox) generated from the photoexcitation of another molecule, called a photosensitizer. (wikipedia.org)
  • This Small Chemical Etching Equipment is a chemical photoengraving processing equipments. (etchmachinery.com)
  • This double side spray Acid etching machine is a chemical photoengraving processing equipment.This machine can use alkaline or acidic etching solution. (etchmachinery.com)
  • Prior to joining Chemical Processing in 2012 he was editor of European Chemical Engineer, European Process Engineer, International Power Engineer, and European Laboratory Scientist , with Setform Limited, London. (chemicalprocessing.com)
  • [6] Estimates are that 90% of all commercially produced chemical products involve catalysts at some stage in the process of their manufacture. (wikipedia.org)
  • The main classes of industrial and natural photo-chemical processes are finally described. (epfl.ch)
  • Light is emitted when excited atoms dispose of their excess energy, through several physical, chemical and biological processes. (lu.se)
  • The photochemical cis-trans isomerization of free stilbene molecules follows a hula-twist pathway. (mpg.de)
  • Photochemical processes can also be used with a specific purpose, e.g. to decompose pollutants or remove toxic substances. (heraeus.com)
  • The Ferric Etching Machine can be configured to do ferric chloride etching, as well as cupric chloride etching,used for photochemical milling filter meshes, seives, screens and grilles. (etchmachinery.com)
  • When applied specifically to the manufacture of customized meshes and filters, PCE is characterized by several process advantages. (ctemag.com)
  • The versatility of micrometal's PCE process removes the limitations OEMs consistently experience when designing filters and meshes. (ctemag.com)
  • In: Femtochemistry VII: Fundamental Ultrafast Processes in Chemistry, Physics, and Biology, S. 96 - 104 (Hg. (mpg.de)
  • The results show that mineral dust may influence tropospheric sulfate, nitrate, and O 3 formation by affecting trace gas concentrations and the tropospheric oxidation capacity through surface processes. (ametsoc.org)
  • Jochen Kern, head of sales and marketing at micrometal said, "When compared with conventional production processes, PCE has several inherent advantages, key among which are the ability to produce parts without degrading material properties, the fact that there is almost no limit on part complexity, and the ability to process a huge range of metals and alloys. (ctemag.com)
  • Actual methods for the removal and degradation of CDs, including electrochemical, photochemical, and biological methods have been developed. (europa.eu)
  • Photochemical upconversion is a strategy for converting infrared light into more energetic, visible light, with potential applications ranging from biological imaging and drug delivery to photovoltaics and photocatalysis. (nature.com)
  • Improving the light-harvesting of amorphous silicon solar cells with photochemical upconversion. (nature.com)
  • For the new process, the developers use a process known as photochemical metallization: When a photoactive layer is irradiated by UV light, colorless silver compounds are transformed into electrically conductive metallic silver. (nanowerk.com)
  • Iron-Induced Changes in Light Harvesting and Photochemical Energy Conversion Processes in Eukaryotic Marine Algae. (epa.gov)
  • Scholars@Duke publication: Drosophila TRPA1 isoforms detect UV light via photochemical production of H2O2. (duke.edu)
  • Our results suggest that specific isoforms of dTRPA1 can sense UV light via photochemical production of H2O2. (duke.edu)
  • Time resolved information about these processes can be obtained using free electron lasers or attosecond light sources. (lu.se)
  • These properties make 2DES the method of choice when exploring the light-triggered processes in complex systems. (lu.se)
  • Physical phenomena such as refraction, diffraction and interference are explained by the wave model of light, but when explaining photoelectric, photochemical or photobiological processes, we use the photon model. (lu.se)
  • Schulze, T. F. & Schmidt, T. W. Photochemical upconversion: present status and prospects for its application to solar energy conversion. (nature.com)
  • Through the scheduled secondments, the involved staff will perform the required R&I to demonstrate the technical and economic feasibility of the developed process, including the technical formation of specialists as a fundamental activity to project success. (europa.eu)
  • Despite the ever-increasing need to understand these energy conversion and transport processes in many fields of Physics, Chemistry, and Biology, many challenges must be addressed due to the multiscale nature of the problem - from atomic to nanoscopic length and time scale. (lu.se)
  • In our Applications Competence Centers worldwide, industrial processes can be simulated and materials tested with UV technology. (heraeus.com)
  • The advantage of dividing the two processes among different centers is in the ability to tune each center for a particular task, whether through selecting different metals or ligands. (wikipedia.org)
  • A detailed gas-phase chemistry mechanism is combined with dust surface uptake processes to explore possible impacts of mineral dust on tropospheric chemistry. (ametsoc.org)
  • Its combination with other processes, like ozonation [ 18 ], has also been demonstrated to be highly effective for complex matrix wastewater remediation. (hindawi.com)
  • Effects of Inorganic Sediment and Food Concentrations on Energetic Processes of the Zebra Mussel, 'Dreissena polymorpha': Implications for Growth in Turbid Rivers. (epa.gov)
  • The reduction process begins with excitation of the photosensitizer, as mentioned. (wikipedia.org)
  • Common donors in photochemical reduction include triethylamine (TEA), triethanolamine (TEOA), and 1-benzyl-1,4-dihydronicotinamide (BNAH). (wikipedia.org)
  • Research was carried out to evaluate the feasibility of fabricating perforated (filigree) magnesium microcomponents with metal wire widths of the order of the metal thickness using a photochemical machining (PCM) process. (pcmi.org)
  • Experimentally, it has been demonstrated for the first time that metal wire widths of 0.15 mm can be achieved within a 2D, 0.25 mm thick magnesium foil to fabricate microcomponents for use as micro air vehicle (MAV) wings or stents through a bespoke PCM process. (pcmi.org)
  • Photochemical etching is a metal processing technology that produces stress-free, flat components by selective etching through a photo-resist mask. (ctemag.com)
  • At micrometal, we have a complete focus on the industrial production of high precision, repeatably accurate micro metal components, and to ensure this the company is constantly evolving the PCE process to offer far superior results than legacy PCE processes. (ctemag.com)
  • Environmentally friendly process could lead to the sustainable production of bioactive compounds and advanced biofuels. (chemicalprocessing.com)
  • Oliviera added that this process offered several benefits: Since it is fast, flexible, variable in size, inexpensive and environmentally friendly, further process steps for post-treatment became unnecessary. (nanowerk.com)
  • Researchers from leading institutions collaborate on a dual-active site catalyst comprising copper and tungsten, which enables an efficient and selective conversion process and. (chemicalprocessing.com)
  • Major uses for this process include purification and feed systems where contaminants are present at high concentration (bulk separations). (processengr.com)
  • In these processes, a tricoordinate boronic ester initially serves as a protective group for a sugar-derived 1,2- or 1,3-diol motif, permitting functionalization of free OH groups. (acs.org)
  • The neural signals initially processed by the retina travel via the axons of the ganglion cells through the optic nerves, dividing and partially crossing over into the optic chiasm and then travelling via the optic tracts to the lateral geniculate nucleus (LGN). (medscape.com)
  • Describe modern instrumental methods for photochemical investigation. (bath.ac.uk)
  • There are three different possibilities we can use depending on the requirements: `Writing conductive paths` using UV lasers is the process which is particularly suitable for the initial customized prototype manufacture and testing the new design of the conductive path. (nanowerk.com)
  • This double spray precision Plaque Etching & Engraving machines is Photochemical etching processing equipments. (etchmachinery.com)
  • This etching process differs significantly from the industrial etching process used currently to manufacture magnesium letterpress printing plates and embossing dies. (pcmi.org)
  • Nanowerk News ) Research scientists at INM - Leibniz Institute for New Materials are presenting a new process that, in a single step, allows manufacture of conductive paths that are just a few micrometers in width on flexible foils. (nanowerk.com)
  • The research scientists at INM - Leibniz-Institute for New Materials are now presenting a new process that, in a single step, allows manufacture of conductive paths that are just a few micrometers in width on carrier materials such as glass but also on flexible foils. (nanowerk.com)
  • On plastic foil, in particular, manufacture using the roll-to-roll process thus becomes particularly efficient. (nanowerk.com)
  • The Eco-Efficiency Analysis compares the life cycles of products or manufacturing processes in a holistic approach from the assessment including raw materials sourcing, product manufacture and use, to disposal or recycling. (basf.com)
  • The Reston Biogeochemical Processes in Groundwater Laboratory (RBPGL) research team conducts long-term investigations on the fate and geochemical effects of organic contaminants in surface and subsurface environments. (usgs.gov)
  • The photochemical growth process of silver decahedra was monitored by both extinction and scattering spectral evolution. (ojp.gov)
  • For a `semi-continuous process` they are particularly suitable for applying the conductive paths on glass," the materials expert says. (nanowerk.com)
  • Thus, the initial steps for a roll-to-roll process would already have been taken," the Head of Optical Materials group concluded. (nanowerk.com)
  • Our application experts give advice on finding the right solution for your process. (heraeus.com)
  • It focuses then on photoredox processes in solution and at the surface of solids. (epfl.ch)
  • The graph reveals the Eco-Efficiency of a product or process compared to other products or processes. (basf.com)
  • In this process, desorption occurs at a pressure much lower than adsorption. (processengr.com)
  • Varying bar sizes and open area ratios can be incorporated to control flow rates across the mesh, and something that appeals to design engineers across the industry is that micrometal's PCE process allows for far greater open areas than is possible using alternative processing technologies due to its ability to produce tiny and intricate wire sizes. (ctemag.com)
  • The speed, cost efficiency, and accuracy of micrometal's PCE process are critical for filter applications. (ctemag.com)
  • In these processes, the individual photon's interaction with an atom or molecule is described, and the energy of the photon is therefore crucial. (lu.se)
  • Visual processing and, ultimately, visual fields begin in the retina. (medscape.com)
  • BASF's Eco-Efficiency Analysis is based on DIN EN ISO 14040 and 14044 for ecological evaluations. (basf.com)