Anionic addition polymerization
Anionic addition polymerization is a form of chain-growth polymerization or addition polymerization that involves the polymerization of monomers initiated with anions. The type of reaction has many manifestations, but traditionally vinyl monomers are used. Often anionic polymerization involves living polymerizations, which allows control of structure and composition.
Anionic Surfactants an overview ScienceDirect Topics
Anionic surfactants work best to remove dirt, clay, and some oily stains. These surfactants work following ionization. When added to water, the anionic surfactants ionize and have a negative charge. The negatively charged surfactants bind to positively charged particles like clay. Anionic surfactants are effective in removing particulate soils
An ion (/ ˈ aɪ ɒ n,-ə n /) is an atom or molecule that has a net electrical charge.Since the charge of the electron (considered negative by convention) is equal and opposite to that of the proton (considered positive by convention), the net charge of an ion is non-zero due to its total number of electrons being unequal to its total number of protons.A cation is a positively charged ion
Cationic definition of cationic by The Free Dictionary
(6-9) Acrylamide has the unique ability to form high-molecular weight polymers (> 1 million Da), to react with a variety of co-monomers to produce cationic, anionic, nonionic, amphoteric, or zwitterionic polymers, and to produce specialized polymers available through derivatization.
The Effects of Anionic, Cationic, and Nonionic Surfactants
The pKa values of ACE inhibitors captopril, cilazapril, enalapril, fosinopril, lisinopril, perindopril, quinapril, ramipril, and zofenopril were determined by potentiometry. Because to the presence of single or several ionizable groups (carboxyl, thiol, primary and secondary
Anionic detergent Britannica
In soap and detergent: Anionic detergents. Among synthetic detergents, commonly referred to as syndets, anionic-active types are the most important. The molecule of an anionic-active synthetic detergent is a long carbon chain to which a sulfo group (―SO 3) is attached, forming the negatively charged (anionic) part.This carbon chain
2016-09-20· The casting process allows obtaining semi-finished plastics and finished components through the anionic polymerization reaction of caprolactam. The
The Differences Between Anionic and Cationic Single
2017-04-25· The Differences Between Anionic and Cationic Single Replacement Cationic and anionic species may be attracted to each other and form a new molecule through ionic bonding. Anionic and Cationic Single Replacement. In anionic replacement, an anion reacts with another ionic molecule. The ionic molecule consists of an anion and cation and loses its anion, replacing it with the new
Anionic definition of anionic by The Free Dictionary
Define anionic. anionic synonyms, anionic pronunciation, anionic translation, English dictionary definition of anionic. n. A negatively charged ion, especially the ion that migrates to an anode in electrolysis. an′i·on′ic adj. an′i·on′i·cal·ly adv. Noun 1. anionic a class...
Innovative Chemistry Anionic Oil Chem Technologies
Oil Chem Technologies has developed a new family of anionic surfactants derived from the reaction of alpha olefin sulfonic acids and various aromatic compounds. This surfactant type differs from the traditional alkyl aryl sulfonic acid since the new AASA has the SO3 group attached to the alkyl chain instead on the benzene ring and bring a series of completely different properties.
(PDF) Adsorption of O2 on Anionic Silver Clusters: Spins
Adsorption of O2 on Anionic Silver Clusters: Spins and Electron Binding Energies Dominate in the Range up to Nano Sizes Article (PDF Available) in Physical Chemistry Chemical Physics 18(2
Regulation mechanism of spin-orbit coupling in charge
The spin transition in the reactions of the derivatives of imidazo[1,2-a]pyrazin-3(7H)-one (1H) with a triplet molecular oxygen ( 3 O 2) has been investigated by the geometry optimization at the B3LYP/6-31+G(d) level and the evaluation of the electronic matrix elements for spin-orbit coupling (SOC) using the full Pauli-Breit SOC operator.The reductive activation for the 3 O 2 reaction is
Intermolecular energy transfer in the bioluminescent
Assessment of Functionals for TDDFT Calculations of One- and Two-Photon Absorption Properties of Neutral and Anionic Fluorescent Proteins Chromophores. Journal of Chemical Theory and Computation 2019, 15 (1),490-508. DOI: 10.1021/acs.jctc.8b00769. Morgane Vacher, Ignacio Fdez.
Chemi- and Bioluminescence of Cyclic Peroxides Request
Mechanistic and kinetic details of the excited-state generation in oxidation processes and peroxide reactions and of the subsequent light emission (chemi-and/or bioluminescence) derived from them
Chemistry of bioluminescence : Pure and Applied Chemistry
Chemi- and Bioluminescence of Cyclic Peroxides Morgane Vacher, Ignacio Fdez. Galván, Bo-Wen Ding, Stefan Schramm, Romain Berraud-Pache, Panče Naumov, Nicolas Ferré, Ya-Jun Liu, Isabelle Navizet, Daniel Roca-Sanjuán, Wilhelm J. Baader, and Roland Lindh
Adsorption behavior of methyl iodide on a silver ion
The chemi- and physisorption behaviors of CH 3 I on Ag-ZSM-5 were investigated. • The unique adsorption experimental set-up was prepared by TGA-GC coupling system. • The accurate adsorption rates and activation energies were calculated. • The fundamentals for a model development of dry filtration system were provided.
Surface Density-of-States Engineering of Anatase TiO2
Enhancement of visible-light photocurrent generation by sol–gel anatase TiO2 films was achieved by binding small polyol molecules to the TiO2 surface. Binding ethylene glycol onto the surface, enhancement factors up to 2.8 were found in visible-light photocurrent generation experiments. Density functional theory calculations identified midgap energy states that emerge as a result of the
Impact of Site-Directed Mutant Luciferase
The peak wavelength of the spectrum of bioluminescence catalyzed by WT Lcr luciferase gradually shifted from 566 nm to 612 nm, and the quantum yield decreased from 37.2% to 16.3% as the pH value of the reaction solution decreased from 8.0 to 6.0. The shift in the peak wavelength is consistent with the results of the previous report 15.The bioluminescent intensity in the green region (~560 nm
A CASSCF/CASPT2 approach to the decomposition
The gas-phase decompositions of a thiazole-substituted dioxetanone, in both the natural and anionic forms, were investigated theoretically in a CASSCF/CASPT2 study. The neutral conjugated thiazole (with or without a hydroxyl group) substitution on the dioxetanone has no evident effect on the dissociation; however, a subsequent deprotonation invoking charge-transfer excitations from the
The proton and metal binding sites responsible for the pH
Firefly luciferases produce yellow-green light under physiological and alkaline conditions, however at acidic pH, higher temperatures or in the presence of heavy metals the color changes to red, a
Study of high-anionic conducting sulfonated microporous
Study of high-anionic conducting sulfonated microporous membranes for zinc-air electrochemical cells Article (PDF Available) in Materials Chemistry and Physics 112(3):798-804 · December 2008 with
Frederick I. Tsuji's research works The University
Coelenterazine analogues possessing the adamantylmethyl group at the C2 or C8 position were prepared to study their effects on chemi- and bioluminescence. Stability of the excited state
Layered Double Hydroxides: Present and Future
Layered Double Hydroxides: Present and Future. Article in Applied Clay Science 22(1):75-76 · January 2002 with 879 Reads How we measure 'reads' A 'read' is counted each time someone views a
Peroxide Chemistry Wiley Online Books
2000-09-11· Waldemar Adam received his PhD from the Massachusetts Institute of Technology and retired as a professor at the University of Würzburg in 2002. Presently he is emeritus professor at the University of Puerto Rico. His research interests include high-energy molecules, chemi- and bioluminescence, photochemistry, laser chemistry, cyclic peroxides, singlet oxygen, oxygen transfer,
Time-resolved chemiluminescence of firefly luciferin
Chemiluminescence (CL) of firefly luciferin (Ln) consisting of red and green emission peaks can be generated by dissolving oxygen (O 2) gas in deoxygenated dimethyl sulfoxide containing potassium tert-butoxide (t-BuOK) even without the enzyme luciferase.In this study, the characteristics of CL of Ln are examined by varying the concentrations of both Ln ([Ln]) and t-BuOK ([t-BuOK]).
Impact of Site-Directed Mutant Luciferase on Quantitative
2013-08-23· The peak wavelength of the spectrum of bioluminescence catalyzed by WT Lcr luciferase gradually shifted from 566 nm to 612 nm and the quantum
Expression of functional NK1 receptors in human alveolar
2005-06-01· This study was undertaken to establish the role of SP in human AM isolated from healthy smokers and non-smokers, by evaluating the presence of tachykinin NK 1 receptors (NK-1R) and SP's ability to induce superoxide anion (O 2 −) production and cytokine release, as well as activation of the nuclear factor-κB (NF-κB) pathway.
CHEMILUMINESCENCE-BASED SENSORS SpringerLink
Chemiluminescence occurs in the course of some chemical reactions when an electronically excited state is generated. Bioluminescence is a special case of chemiluminescence occurring in some living organisms and involves a protein, generally an enzyme.
DE19728393C2 Process and apparatus for removing
DE19728393C2 Process and apparatus for removing anionic trash from an aqueous pulp suspension Google Patents Process and apparatus for removing anionic trash from an aqueous pulp suspension . Info Publication number DE19728393C2. DE19728393C2 DE1997128393 DE19728393A DE19728393C2 DE 19728393 C2 DE19728393 C2 DE 19728393C2 DE 1997128393 DE1997128393
Burr J G．Chemi．and Bioluminescence．New York：Marcel Dekker，1985。495 ．531． Campanella L，Favero 559．565． Cheng S A，Fung G Tomassetti M．A modified ampero－metric electrode for the determination of free radicals．Sens．Actuators，B，1 997，44（1—3）： W K Chan K Y et a1．Optimizing dectron spin resonance
Dopamine functionalized tannic-acid-templated
2017-03-22· A simple, environmentally friendly and cost-effective nonsurfactant template method was used to synthesize tannic-acid-templated mesoporous silica nanoparticles (TMSNs), and then dopamine
Nitrogen monofluoride (fluoroimidogen) is a metastable species that has been observed in laser studies. It is isoelectronic with O 2.Like boron monofluoride, it has unusual higher than single-bonded fluorine. It is unstable with respect to its formal dimer, dinitrogen difluoride, as well as to its elements, nitrogen and fluorine.Nitrogen monofluoride can be formed by the decomposition of
Phrixotrix luciferase and 6′-aminoluciferins reveal a
2019-06-21· How the unique luciferase of Phrixothrix hirtus (PxRE) railroad worm catalyzes the emission of red bioluminescence using the same luciferin of fireflies, remains a mystery. Although PxRE
Beyond the Barriers of Light Penetration: Strategies
Chemi- and Bio-luminescent probes for PDT. Chemi- and bio-luminescent probes were the first self-emitters used to locally activate a PS in deep tissues. Both types of probes generate luminescent products, but contrary to chemiluminescence, the light emitted by bioluminescent probes is derived from enzymatic activity .
Thermochemiluminescent peroxide crystals Nature
Chemiluminescence, a process of transduction of energy stored within chemical bonds of ground-state reactants into light via high-energy excited intermediates, is known in solution, but has
The addition of CO2 to four superbase ionic liquids: a DFT
The addition of carbon dioxide to four superbase ionic liquids, [P3333][Benzim], [P3333][124Triz], [P3333][123Triz] and [P3333][Bentriz] was studied using a molecular DFT approach involving anions alone and individual ion pairs.
CHEMISTRY OF FIREFLY BIOLUMINESCENCE
CHEMISTRY OF FIREFLY BIOLUMINESCENCE Bruce R. Branchini Department of Chemistry Connecticut College New London, CT 06320 [email protected] Introduction
The Sensitized Bioluminescence Mechanism of Bacterial
After more than one‐half century of investigations, the mechanism of bioluminescence from the FMNH 2 assisted oxygen oxidation of an aliphatic aldehyde on bacterial luciferase continues to resist elucidation. There are many types of luciferase from species of bioluminescent bacteria originating from both marine and terrestrial habitats.
Guest-responsive porous magnetic frameworks using
Guest-responsive porous magnetic frameworks using polycyanometallates†. Masaaki Ohba * ab, Ko Yoneda a and Susumu Kitagawa * abc a Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan.