Formation photo induced photochemical processes. Medical search. Frequent questions

Our proposed mechanism integrates thermodynamic and reaction kinetics of the RB photo-oxidation reaction via the monitoring of the photochemical reactions with multiple spectroscopic techniques in tandem. (aiche.org)
1. study of photochemical reactions involving proteins and protein related molecules. (europa.eu)
Understanding the mechanisms of these reactions in detail offers new insight into a range of vital physical and chemical processes, ranging from the breaking of a single chemical bond all the way through to complex multistep processes occurring in biological systems. (ox.ac.uk)
Successful time-resolved crystallography studies have used the pump-probe approach, and the light-induced X-ray crystallographic difference densities have been assigned to reactions and excited-state processes. (nature.com)
Certain reactions induced by light can be responsible for a detrimental decay of wine. (infowine.com)
2] Photochemical reactions proceed differently than temperature-driven reactions. (nationalvendingblog.com)
In the case of photochemical reactions, light provides the activation energy. (nationalvendingblog.com)
Photochemical paths access high energy intermediates that cannot be generated thermally, thereby overcoming large activation barriers in a short period of time, and allowing reactions otherwise inaccessible by thermal processes. (nationalvendingblog.com)
B) The use of photochemical reagents to carry out site-specific reactions on DNA, in particular those involving photo-induced electron transfer. (tcd.ie)
The entire capability of nanocrystals in semi-conductors and plasmons may now be investigated and photochemical reactions can concurrently be generated and observed. (techthoroughfare.com)
Furthermore, Mg is inevitable for ultrastructure formation of chloroplasts which is necessary for efficient functioning of the light reactions in the photosynthesis. (iapn.de)
Types of reactions include but are not limited to acute inflammatory reactions, granulomatous reactions, lichenoid reactions, sarcoid reactions, photo-aggravated reactions, and MRI sensitivity reactions. (medscape.com)
This effect can be used to modify reaction pathways of chemical and photo-chemical reactions. (su.se)

Photochemical and Photobiological Sciences. (elsevierpure.com)

Conventional photodynamic techniques depend on the formation of reactive oxygen species to destroy tumor cells, but many tumors contain environments that lack oxygen. (u-tokyo.ac.jp)
Light in excess, however, causes the simultaneous production of singlet oxygen, a potent reactive oxygen species (ROS), leading to photo-oxidative damage in PSII. (elifesciences.org)

Photochemical selectivity and multi-state reactivity. (uni-bonn.de)

Photochemical tissue bonding (PTB) of wounds and surgical incisions relies on the use of photosensitive molecules and light to induce the formation of covalent linkages in collagenous tissue. (aiche.org)
In the course of such processes, photo-excitations promote molecules into thermally inaccessible excited states. (uni-potsdam.de)
This unexpected collision-induced transformation of individual CO 2 molecules provides an accessible pathway for generating O 2 in astrophysical environments and may inspire plasma-driven electro- and photo-catalytic strategies for terrestrial CO 2 reduction. (nature.com)
The team used molecules called "organorhodium(III) phthalocyanine (Pc) complexes" to develop, for the first time, a novel platform for photo-uncaging therapy. (u-tokyo.ac.jp)
Our new technology could allow the photochemical generation of a wide variety of alkyl radicals and aldehydes, making possible the site-selective release of various bioactive molecules," says senior author Kazuyuki Ishii. (u-tokyo.ac.jp)
With the advancement of cavity quantum electrodynamics and its recent application to molecules, using the quantum properties of light to control photo-chemistry has come into reach. (su.se)

The process involves a previously unknown intramolecular reaction pathway, which occurs in energetic CO 2 ion-surface collisions with a surprising lack of dependence on either the nature of the surface or the surface temperature. (nature.com)

The rapid reaction of protons to 1s photo-excitations can yield directional structural distortions within the femtosecond core-excited state lifetime. (uni-potsdam.de)
This reaction pathway led to the formation of triplet spin-correlated radical pair of anion radical of CBP and N-centered aminium cation radical which deprotonated within tens of nanoseconds. (europa.eu)
Here we show that this reaction occurs readily when CO 2 ions scatter from solid surfaces in a two-step sequential collision process at hyperthermal incidence energies. (nature.com)
We study photoinduced and electron-induced chemistry in the gas phase, using velocity-map imaging to record scattering distributions of reaction products and covariance-map imaging to investigate correlations between different products. (ox.ac.uk)
The measured scattering distributions provide a 'fingerprint' for the process under study, and can be analysed in order to unpick details of the reaction mechanism. (ox.ac.uk)
The structural dynamics that result from femtosecond optical excitation have contributions from vibrational and electronic processes and from reaction dynamics that involve the crossing through a conical intersection. (nature.com)
However, we demonstrate that the measured motions are not part of the photoisomerization reaction but instead arise from impulsively driven coherent vibrational processes in the electronic ground state. (nature.com)
The oxidation of this amino acid leads to methional that is unstable and photo-reactive and, through the retro-Michael reaction, generates methanethiol (MeSH) and acrolein. (infowine.com)
All the above mentioned processes were found to follow a first order kinetics reaction. (scirp.org)
To maintain photosynthetic activity, the PSII reaction center protein D1, which is the primary target of unavoidable photo-oxidative damage, is efficiently degraded by FtsH protease. (elifesciences.org)
In photosynthetic organisms, maintenance of photosynthetic light reaction is manifested by so called Photosystem II (PSII) repair system, where the reaction center protein D1 is targeted to photo-oxidative damage and rapidly degraded by the processive protease FtsH. (elifesciences.org)
This reaction usually recedes without consequence within 2-3 weeks and is an expected adverse effect of the tattooing process. (medscape.com)

We show that highly oriented ground state vibrational modes of coupled nuclear motion can be populated through RIXS processes by preparation of core-excited state nuclear wave packets with the same directionality. (uni-potsdam.de)
Photo-induced primary processes of trans-[Co(acac)2(N3)(py)] in liquid solution studied by femtosecond vibrational and electronic spectroscopies. (uni-bonn.de)
Probing the primary processes of a triazido-cobalt(III) complex with femtosecond vibrational and electronic spectroscopies. (uni-bonn.de)

We provide a comprehensive analysis of the photochemical and photophysical pathways of nanocaged RB to better understand how to control the function of RB as a photo-active ROS-therapeutic agent. (aiche.org)

Ultrafast dynamics of photochemical nitrile imine formation. (uni-bonn.de)
The group works on a wide variety of topics involving photo chemistry, coherent control, polaritonic chemistry, ultrafast spectroscopy, and numerical methods related to quantum dynamics. (su.se)

3. modelling of non-enzymatic Deoxyribonucleic acid (DNA) repair via electron transfer from amino acids to the oxidised purine nucleotides that we recently found as a prototype of fast chemical repair of radiation induced damages of DNA and extending the findings to systems with increased complexity within the frame of proteomic research on peculiarities of recognition and processing of DNA substrate. (europa.eu)
We are currently studying electron-initiated processes relevant to radiation-induced damage to DNA and formation and destruction of polycyclic aromatic hydrocarbons (PAHs) in interstellar gas clouds. (ox.ac.uk)
K. Krapfenbauer and N. Getoff, "Comparative Studies of Photo-and-Radiation-Induced Degradation of Aqueous EDTA. (scirp.org)

The camera collects lights in semiconductors, causing processes of electron transfer, such as photosynthesis, which can be examined using spectroscopic methods and gold nanoparticles. (techthoroughfare.com)
The camera is utilized to monitor catalytic photography and monitor light-induced electron transfer. (techthoroughfare.com)

Decay processes towards energetically lower lying states in transient molecular geometries result in the formation of excited state relaxation pathways. (uni-potsdam.de)

We utilize them to identify photo-induced N deprotonation of 2-thiopyridone on femtosecond timescales, in optical pump N K-edge RIXS probe measurements. (uni-potsdam.de)
Photoinduced dynamics of a diazidocobalt(III) complex studied by femtosecond UV-pump/IR-to-Vis-probe spectroscopy. (uni-bonn.de)

Dissipation of absorbed light energy as heat energy is induced by the molecular mechanism of non-photochemical quenching (NPQ) and can be determined from measurements of chlorophyll fluorescence. (iapn.de)
Therefore, exploring the related process mechanism is of significant importance. (frontiersin.org)

The work involved the application of the nuclear magnetic resonance (NMR) technique termed Chemically induced dynamic nuclear polarisation (CIDNP) that allowed for high sensitivity and spectral resolution in crowded spectra combined with optical initiation of chemical intermediates. (europa.eu)

Such directional structural deformations, induced by core-excitations, also make proton dynamics in electronic ground states accessible through RIXS transitions into vibrationally excited states. (uni-potsdam.de)
Structural transformations in crystals induced by radiation and pressure. (google.pl)
This effect is photochemical rather than thermal or structural [8]. (who.int)

An oxidative pressure acid leaching process was investigated for the extraction of Ni/Co/Cu/Zn metal values from base metal smelter slags. (sharif.edu)
In PSII subunits, photo-oxidative modifications of several amino acids such as Trp have been indeed documented, whereas the linkage between such modifications and D1 degradation remains elusive. (elifesciences.org)

Therefore, site-selective and orbital-specific K-edge soft X-ray spectroscopy techniques are used here to detect photo-induced proton dynamics in gaseous and liquid sample environments. (uni-potsdam.de)
Our work ranges from fundamental studies of photon and electron-induced chemistry to the development of new types of chemical sensor and applications of spectroscopy in medicine. (ox.ac.uk)
Time-resolved Fourier-transform infrared spectroscopy reveals the hidden bimolecular process of the ferrioxalate actinometer. (uni-bonn.de)

Although a large amount of chlorpyrifos is used in various environments (see Chapter 4), levels of general exposure are mediated by its limited mobility and persistence, and by environmental degradation processes. (cdc.gov)
Formation of amides was con - firmed during the degradation processes. (scirp.org)

On a molecular level, the energy contained in the electromagnetic radiation is transferred through photochemical processes into chemical or thermal energy. (uni-potsdam.de)

In this process, numerous complex processes take place in the chloroplast, including the xanthophyll cycle, which involves the conversion of violaxanthin to zeaxanthin by the enzyme violaxanthin de-epoxidase (VDE) and the protonation of the photosystem II protein subunit PsbS. (iapn.de)

Using these signatures of RIXS transitions into electronically excited states, we investigate proton dynamics induced by N K-edge excitation in the amino-acid histidine. (uni-potsdam.de)
The Electromagnetic Waves in Complex Systems: Selected Theoretical and Applied until research of a widespread earth is alternately 24-48 equations whereas a finite shock seems dispatched very or within a Equiprobable dynamics after the process. (mariacocchiarelli.com)

The organorhodium(III) phthalocyanine (Pc) complexes we developed are highly stable under ambient light during the processes of synthesis, purification, and measurement, but can be activated by a laser that gives out nanosecond pulses of red light," explains lead author Kei Murata. (u-tokyo.ac.jp)
Measurement of non-photochemical quenching (NPQ) by chlorophyll fluorescence: Due to reduced assimilation capacity, light energy is in excess to what can be used in photosynthesis and can damage the plant. (iapn.de)

This induces adaptations of their molecular geometry according to the properties of the excited state. (uni-potsdam.de)
In self-limiting processes, nature regulates the assembling of complex structures on the molecular scale. (techthoroughfare.com)
The underlying effect is the formation of so called "dressed states", which are created when the quantized radiation field mode couples to a molecular electronic transition. (su.se)

This thesis focuses on systems in which photo-induced deprotonation processes occur at specific atomic sites. (uni-potsdam.de)
Most photochemical transformations occur through a series of simple steps known as primary photochemical processes. (nationalvendingblog.com)

In contrast, older iron formations were deposited in anoxic oceans , where ferrous iron oxidation by anoxygenic photosynthetic bacteria was likely an important process. (docslib.org)
Under such conditions, the absorption of light in the light harvesting complexes of the photosystems is excessive, i.e., the available energy cannot be consumed by the photosynthetic processes. (iapn.de)
IAPN is conducting research on how photosynthetic processes are affected by the nutrient supply status: the spinach leaf shown here has visible symptoms of magnesium deficiency. (iapn.de)
The plant nutrient magnesium (Mg) plays crucial roles in photosynthetic processes. (iapn.de)
The research aims at understanding how the photosynthetic processes are affected at a range of Mg concentrations and corresponding how photoprotection is affected by Mg supply. (iapn.de)

Recent, ground breaking experiments have show that one can utilize the vacuum field of an optical nano-resonator to significantly modify the potential energy landscape and thus its photo-chemistry. (su.se)

A coherent-control experiment using a two-colour and two-pulse optical excitation strongly amplifies the X-ray crystallographic difference density, while it fully depletes the photoisomerization process. (nature.com)

Weathering processes are divided into physical and chemical weathering. (wikipedia.org)
Physical weathering, also called mechanical weathering or disaggregation, is the class of processes that causes the disintegration of rocks without chemical change. (wikipedia.org)
The photo-chemical relaxation mechanisms depend on the studied system itself, the interactions with its chemical environment and the character of the involved states. (uni-potsdam.de)
Figure 1: Chemical mechanisms involved in photo-degradation of riboflavin and methionine (Fracassetti et al. (infowine.com)
Contemporarily, a further comprehension of the chemical mechanisms behind the LST formation can support specific oenological treatments as well as clarify the reasons why certain white wines can be more susceptible than others (Mattivi et al. (infowine.com)
In the few steps of the process, there are very few equipments used like the chemical reagent, maskants, and etchants. (nationalvendingblog.com)
The benefits of chemical etching should be considered in the Design For Manufacturing process when choosing a manufacturing method for industrial components. (nationalvendingblog.com)
The elimination of mechanical tooling and its long lead time, the absence of surface burrs and deburring requirements, plus the speed with intricate designs makes photo chemical etching a fast manufacturing process for prototypes or large production. (nationalvendingblog.com)
The presence of EDTA in decontamination wastes can cause complexation of the cations resulting into interferences in their removal by various treatment processes such as chemical precipitation, ion exchange etc. (scirp.org)
With the new insight and tools we want to propose new photo-chemical applications. (su.se)

The light-induced cross-linking of collagenous matrices in the presence of RB has yielded promising results in laboratory and clinical trials in terms of wound closure, reduced inflammation and less scaring. (aiche.org)
We covered topics going from the photochemical mechanisms involved, the different cell death mechanisms being triggered by a myriad of photosensitizers up to the more recent-on-going clinical trials. (oaepublish.com)
Bilirubin-induced neurologic dysfunction (BIND) refers to the clinical signs associated with bilirubin toxicity (ie, hypotonia followed by hypertonia and/or opisthotonus or retrocollis) and is typically divided into acute and chronic phases. (medscape.com)

Late Paleoproterozoic iron formations and Paleozoic ironstones were deposited at the redoxcline where biolog- ical and nonbiological oxidation occurred. (docslib.org)
From the observed pH changes during the oxidation processes, it can be concluded that there is a loss of chelating ability of EDTA. (scirp.org)

Examples of photochemical systems we have studied recently include photolysis of neutral and ionic ethyl bromide and ethyl iodide, which play a role in the marine boundary layer of the Earth's atmosphere, and photolysis of N,N-dimethylformamide, a model for peptide bond fragmentation. (ox.ac.uk)

In nature, photochemistry is of immense importance as it is the basis of photosynthesis, vision, and the formation of vitamin D with sunlight. (nationalvendingblog.com)
This study adds a valuable new perspective to a long-standing question: What controls the repair of photosystem II (PSII), a key process in maintaining and optimizing photosynthesis? (elifesciences.org)

Chan, M. S. and J. R. Bolton (1980) Structures, reduction potentials and absorption maxima of synthetic dyes of interest in photochemical solar-energy storage studies. (photochemcad.com)

Abiotic hydrolysis, photodegradation, and biodegradation are all important processes for the transformation and degradation of chlorpyrifos. (cdc.gov)

When RF is exposed to light, it reaches a high energy state and two photo-degradative mechanisms can take place. (infowine.com)

The unceasing impact of intense sunlight on earth constitutes a continuous source of energy fueling countless natural processes. (uni-potsdam.de)
Her research interests include the advanced materials processing of ideal electrode materials for electrochemical energy storage system applications such as supercapacitor, water splitting process, direct methanol fuel cells, and hydrogen generation. (rsc.org)
K-Laser Therapy is a Class IV Laser Therapy utilizing red and near-infrared wavelengths of light energy to induce a photochemical and therapeutic effect, Photo-Biomodulation, on the tissues of the heel and plantar fascia. (platinumnetworkingassociates.com)
Light energy passes through the skin into the cell membranes, initiating a process called Photobiomodulation. (platinumnetworkingassociates.com)

Rarely, medically induced tattoos have developed after the use of ferrous subsulfate solution (Monsel's solution) for coagulation purposes. (medscape.com)

The early distinction made between these two iron-formation types, although mimimized by later studies, remains a valid first approximation. (docslib.org)
Geochronologic studies emphasize the episodic nature of the deposition of giant iron formations, as they are coeval with, and genetically linked to, time periods when large igneous provinces (LIPs) were emplaced. (docslib.org)

Electrochemical elaboration of thin films of poly[RuII(L)(CO)2Cl2] (L = 4-(2-pyrrol-1-ylethyl)-4'-methyl-2,2'-bipyridine or 4,4'-bis((3-pyrrol-1-ylpropyloxy)carbonyl)-2,2'-bipyridine): photochemical properties and photoimaging. (univ-grenoble-alpes.fr)
STORM and other SMLMs are conceptually similar techniques: the photochemical properties of the fluorophore are exploited to induce a weakly emissive or non-emissive "dark" state. (microscopyu.com)

Oxygen atom functionalization has played an indispensable role in industrial applications and biological processes. (rsc.org)

Metastasis are characterized by a sequential and complex process during which cancer cells invade specific organs including lung, liver, brain, and bone [ 3 ] . (oaepublish.com)

One approach to treating cancer is photodynamic therapy using photo-uncaging systems, in which light is used to activate a cancer-fighting agent in situ at the tumor. (u-tokyo.ac.jp)
Photo-uncaging systems, where the agent is administered in an inactive form and then activated, or "uncaged", in the location of the tumor, address this issue. (u-tokyo.ac.jp)
As an improvement on other photo-uncaging systems, it opens an exciting new avenue for the treatment of cancer by phototherapy. (u-tokyo.ac.jp)
adaptive Initial processes( FDMs) are emitted So enhanced to lead expensive Electromagnetic Waves in Complex Systems: Selected Theoretical and Applied Problems, but concepts employ not used specific to get velocity systems for FDMs in considered ions. (mariacocchiarelli.com)
In Light Wellness Systems™ is a photo-modulated (pulsed, light emitting diodes) device also known as low-level light therapy (LLLT). (whitedoveglobal.com)

Abstract Iron formations are economically important sedimentary rocks that are most common in Precambrian sedi- mentary successions. (docslib.org)

2. investigation of structure, i.e. surface accessibility and confinement, and dynamic processes, i.e. intermolecular electron and proton transfer, in native and ill defined partly folded and denatured states of proteins as promising new applications. (europa.eu)

The results indicated that the relaxation processes shift the Curie temperature of amorphous phase to the higher temperatures. (sharif.edu)

We establish a pH dependant oligomerisation pathway forming tetrameric DEC-205 using solution-based techniques and ultimately solved the 4.9 Å cryo-EM structure of the DEC-205 tetramer to identify the unfurling of the second lectin ring which enables tetramer formation. (uci.edu)

Kinetic steady-state analysis showed that dimeric species are not as effective as monomeric RB for the photochemical ROS-mediated therapy. (aiche.org)
Polychromatic light therapy has been established as a useful tool to increasing the formation of new capillaries, which are additional blood vessels that replace damaged ones. (whitedoveglobal.com)

Photo-initiated cobalt catalyzed radical olefin hydrogenation. (uni-bonn.de)

M. Sorensen and F. H. Frimmel, "Photodegradation of EDTA and NTA in the UV/H2O2 Process," Zeitschrift für Naturforschung, Vol. 50, No. 12, 1995, pp. 1845-1853. (scirp.org)

However, it is frequently time-consuming, costly, and sophisticated methods to imitate these processes in the laboratory. (techthoroughfare.com)

They uncage alkyl radicals, which are known to be capable of inducing cell death both with and without the presence of oxygen. (u-tokyo.ac.jp)
Alkyl radicals are converted into terminal aldehydes in the presence of oxygen, and these terminal aldehydes can also induce cell death. (u-tokyo.ac.jp)

These conditions are unusual enough that frost wedging is unlikely to be the dominant process of frost weathering. (wikipedia.org)
Banded iron formation (BIF) is dominant in Archean to earliest Paleopro- terozoic successions, whereas granular iron formation (GIF) is much more common in Paleoproterozoic suc- cessions. (docslib.org)

EDTA is effectively degraded by the synergistic effect of both Photo Fenton and Sono Fenton process. (scirp.org)
Dr. Batson, at Batson Chiropractic, is utilizing the K-Laser Cube 4 , a state-of-the-art, Class IV therapeutic laser which delivers specific red and near-infrared wavelengths of light to induce a photochemical and therapeutic effect on tissues. (platinumnetworkingassociates.com)

Anatomy2

Organisms1

Diseases1

Chemicals and Drugs5

Analytical, Diagnostic and Therapeutic Techniques and Equipment6

Phenomena and Processes8

Technology, Industry, Agriculture1

Information Science2

Health Care3

Reactions13

Photobiological Sciences1

Reactive oxygen2

Reactivity1

Molecules6

Intramolecular reaction1

Reaction12

Vibrational3

Photophysical1

Ultrafast2

Radiation induced3

Electron transfer2

Pathways1

Femtosecond2

Mechanism2

Intermediates1

Structural3

Oxidative2

Spectroscopy3

Degradation processes2

Thermal1

Protein1

Dynamics2

Measurement2

Molecular3

Occur2

Photosynthetic5

Chemistry1

Excitation1

Chemical10

Clinical3

Oxidation2

Photolysis1

Photosynthesis2

Absorption1

Transformation1

Mechanisms1

Energy4

Ferrous1

Studies2

Properties2

Biological1

Sequential1

Systems5

Abstract1

Proton1

Relaxation1

Techniques1

Therapy2

Radical1

Photodegradation1

Laboratory1

Cell2

Dominant2

Effect2