Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
A plant genus of the family ASTERACEAE known for allergenic pollen (ALLERGENS).
Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).
Computer-based representation of physical systems and phenomena such as chemical processes.
Paralysis of one or more of the ocular muscles due to disorders of the eye muscles, neuromuscular junction, supporting soft tissue, tendons, or innervation to the muscles.
The study of those aspects of energy and matter in terms of elementary principles and laws. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The 6th cranial nerve which originates in the ABDUCENS NUCLEUS of the PONS and sends motor fibers to the lateral rectus muscles of the EYE. Damage to the nerve or its nucleus disrupts horizontal eye movement control.
The group in which legal authority is vested for the control of health-related institutions and organizations.
Spontaneous or voluntary recreational activities pursued for enjoyment and accessories or equipment used in the activities; includes games, toys, etc.
The visually perceived property of objects created by absorption or reflection of specific wavelengths of light.
A form of interactive entertainment in which the player controls electronically generated images that appear on a video display screen. This includes video games played in the home on special machines or home computers, and those played in arcades.
Theoretical construct used in applied mathematics to analyze certain situations in which there is an interplay between parties that may have similar, opposed, or mixed interests. In a typical game, decision-making "players," who each have their own goals, try to gain advantage over the other parties by anticipating each other's decisions; the game is finally resolved as a consequence of the players' decisions.
Organizations which certify physicians and dentists as specialists in various fields of medical and dental practice.
Positively charged atoms, radicals or groups of atoms which travel to the cathode or negative pole during electrolysis.
A naturally occurring compound that has been of interest for its role in osmoregulation. As a drug, betaine hydrochloride has been used as a source of hydrochloric acid in the treatment of hypochlorhydria. Betaine has also been used in the treatment of liver disorders, for hyperkalemia, for homocystinuria, and for gastrointestinal disturbances. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1341)
The profession of writing. Also the identity of the writer as the creator of a literary production.
Ring compounds having atoms other than carbon in their nuclei. (Grant & Hackh's Chemical Dictionary, 5th ed)
Changing an open-chain hydrocarbon to a closed ring. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
A chemical element having an atomic weight of 106.4, atomic number of 46, and the symbol Pd. It is a white, ductile metal resembling platinum, and following it in abundance and importance of applications. It is used in dentistry in the form of gold, silver, and copper alloys.
Reversible chemical reaction between a solid, often one of the ION EXCHANGE RESINS, and a fluid whereby ions may be exchanged from one substance to another. This technique is used in water purification, in research, and in industry.
QUATERNARY AMMONIUM COMPOUNDS based on BENZYLAMINES with the general formula phenyl-CN+R3.
Devices that control the supply of electric current for running electrical equipment.
High molecular weight insoluble polymers which contain functional anionic groups that are capable of undergoing exchange reactions with cations.
A class of devices combining electrical and mechanical components that have at least one of the dimensions in the micrometer range (between 1 micron and 1 millimeter). They include sensors, actuators, microducts, and micropumps.
Artificially produced membranes, such as semipermeable membranes used in artificial kidney dialysis (RENAL DIALYSIS), monomolecular and bimolecular membranes used as models to simulate biological CELL MEMBRANES. These membranes are also used in the process of GUIDED TISSUE REGENERATION.
Exclusive legal rights or privileges applied to inventions, plants, etc.
Substances that counteract or neutralize acidity of the GASTROINTESTINAL TRACT.
An inorganic compound that occurs in nature as the mineral brucite. It acts as an antacid with cathartic effects.
A compound with many biomedical applications: as a gastric antacid, an antiperspirant, in dentifrices, as an emulsifier, as an adjuvant in bacterins and vaccines, in water purification, etc.
A poly(dimethylsiloxane) which is a polymer of 200-350 units of dimethylsiloxane, along with added silica gel. It is used as an antiflatulent, surfactant, and ointment base.
Magnesium oxide (MgO). An inorganic compound that occurs in nature as the mineral periclase. In aqueous media combines quickly with water to form magnesium hydroxide. It is used as an antacid and mild laxative and has many nonmedicinal uses.
A hydrated form of silicon dioxide. It is commonly used in the manufacture of TOOTHPASTES and as a stationary phase for CHROMATOGRAPHY.
Carbonic acid calcium salt (CaCO3). An odorless, tasteless powder or crystal that occurs in nature. It is used therapeutically as a phosphate buffer in hemodialysis patients and as a calcium supplement.
The discarding or destroying of liquid waste products or their transformation into something useful or innocuous.
Refuse liquid or waste matter carried off by sewers.
Testing for the amount of biodegradable organic material in a water sample by measuring the quantity of oxygen consumed by biodegradation of those materials over a specific time period.
Polymers synthesized by living organisms. They play a role in the formation of macromolecular structures and are synthesized via the covalent linkage of biological molecules, especially AMINO ACIDS; NUCLEOTIDES; and CARBOHYDRATES.
Contaminated water generated as a waste product of human activity.
Worthless, damaged, defective, superfluous or effluent material from industrial operations.

The contribution of adjacent subunits to the active sites of D-3-phosphoglycerate dehydrogenase. (1/3963)

D-3-Phosphoglycerate dehydrogenase (PGDH) from Escherichia coli is allosterically inhibited by L-serine, the end product of its metabolic pathway. Previous results have shown that inhibition by serine has a large effect on Vmax and only a small or negligible effect on Km. PGDH is thus classified as a V-type allosteric enzyme. In this study, the active site of PGDH has been studied by site-directed mutagenesis to assess the role of certain residues in substrate binding and catalysis. These consist of a group of cationic residues (Arg-240, Arg-60, Arg-62, Lys-39, and Lys-141') that potentially form an electrostatic environment for the binding of the negatively charged substrate, as well as the only tryptophan residue found in PGDH and which fits into a hydrophobic pocket immediately adjacent to the active site histidine residue. Interestingly, Trp-139' and Lys-141' are part of the polypeptide chain of the subunit that is adjacent to the active site. The results of mutating these residues show that Arg-240, Arg-60, Arg-62, and Lys-141' play distinct roles in the binding of the substrate to the active site. Mutants of Trp-139' show that this residue may play a role in stabilizing the catalytic center of the enzyme. Furthermore, these mutants appear to have a significant effect on the cooperativity of serine inhibition and suggest a possible role for Trp-139' in the cooperative interactions between subunits.  (+info)

The stimulatory effects of Hofmeister ions on the activities of neuronal nitric-oxide synthase. Apparent substrate inhibition by l-arginine is overcome in the presence of protein-destabilizing agents. (2/3963)

A variety of monovalent anions and cations were effective in stimulating both calcium ion/calmodulin (Ca2+/CaM)-independent NADPH-cytochrome c reductase activity of, and Ca2+/CaM-dependent nitric oxide (NO.) synthesis by, neuronal nitric oxide synthase (nNOS). The efficacy of the ions in stimulating both activities could be correlated, in general, with their efficacy in precipitating or stabilizing certain proteins, an order referred to as the Hofmeister ion series. In the hemoglobin capture assay, used for measurement of NO. production, apparent substrate inhibition by L-arginine was almost completely reversed by the addition of sodium perchlorate (NaClO4), one of the more effective protein-destabilizing agents tested. Examination of this phenomenon by the assay of L-arginine conversion to L-citrulline revealed that the stimulatory effect of NaClO4 on the reaction was observed only in the presence of oxyhemoglobin or superoxide anion (generated by xanthine and xanthine oxidase), both scavengers of NO. Spectrophotometric examination of nNOS revealed that the addition of NaClO4 and a superoxide-generating system, but neither alone, prevented the increase of heme absorption at 436 nm, which has been attributed to the nitrosyl complex. The data are consistent with the release of autoinhibitory NO. coordinated to the prosthetic group of nNOS, which, in conjunction with an NO. scavenger, causes stimulation of the reaction.  (+info)

Screening for mutations of the cationic trypsinogen gene: are they of relevance in chronic alcoholic pancreatitis? (3/3963)

BACKGROUND: In hereditary pancreatitis mutations of exons 2 (N21I) and 3 (R117H) of the cationic trypsinogen gene have been described. AIMS: To investigate whether the same mutations can also be found in patients with chronic alcoholic pancreatitis. METHODS: Leucocyte DNA was prepared from 23 patients with chronic alcoholic pancreatitis, 21 with alcoholic liver cirrhosis, 34 individuals from seven independent families with hereditary pancreatitis, and 15 healthy controls. DNA was also obtained from pancreatic tissue (n=7) and from pancreatic juice (n=5) of patients suffering from chronic alcoholic pancreatitis. R117H was detected by restriction digestion with Afl III. N21I was identified by an allele specific polymerase chain reaction (PCR). RESULTS: R117H was detected in four families with hereditary pancreatitis. The N21I mutation was identified in three families. All mutations were confirmed by sequencing of the corresponding DNAs. In patients with chronic alcoholic pancreatitis neither the exon 2 nor exon 3 mutations were present in blood leucocytes, pancreatic juice, or pancreatic tissue. DNA of the patients with alcoholic liver cirrhosis as well as all controls was of wild type. CONCLUSIONS: The allele specific PCR may be used to screen for the N21I mutation of cationic trypsinogen. Both trypsinogen mutations were found in hereditary pancreatitis but do not seem to be major pathogenic factors in chronic alcoholic pancreatitis.  (+info)

Location of a cation-binding site in the loop between helices F and G of bacteriorhodopsin as studied by 13C NMR. (4/3963)

The high-affinity cation-binding sites of bacteriorhodopsin (bR) were examined by solid-state 13C NMR of samples labeled with [3-13C]Ala and [1-13C]Val. We found that the 13C NMR spectra of two kinds of blue membranes, deionized (pH 4) and acid blue at pH 1.2, were very similar and different from that of the native purple membrane. This suggested that when the surface pH is lowered, either by removal of cations or by lowering the bulk pH, substantial change is induced in the secondary structure of the protein. Partial replacement of the bound cations with Na+, Ca2+, or Mn2+ produced additional spectral changes in the 13C NMR spectra. The following conclusions were made. First, there are high-affinity cation-binding sites in both the extracellular and the cytoplasmic regions, presumably near the surface, and one of the preferred cation-binding sites is located at the loop between the helix F and G (F-G loop) near Ala196, consistent with the 3D structure of bR from x-ray diffraction and cryoelectron microscopy. Second, the bound cations undergo rather rapid exchange (with a lifetime shorter than 3 ms) among various types of cation-binding sites. As expected from the location of one of the binding sites, cation binding induced conformational alteration of the F-G interhelical loop.  (+info)

Modulation of slow inactivation in human cardiac Kv1.5 channels by extra- and intracellular permeant cations. (5/3963)

1. The properties and regulation of slow inactivation by intracellular and extracellular cations in the human heart K+ channel hKv1.5 have been investigated. Extensive NH2- and COOH-terminal deletions outside the central core of transmembrane domains did not affect the degree of inactivation. 2. The voltage dependence of steady-state inactivation curves of hKv1.5 channels was unchanged in Rb+ and Cs+, compared with K+, but biexponential inactivation over 10 s was reduced from approximately 100 % of peak current in Na+ to approximately 65 % in K+, approximately 50 % in Rb+ and approximately 30 % in Cs+. This occurred as a result of a decrease in both fast and slow components of inactivation, with little change in inactivation time constants. 3. Changes in extracellular cation species and concentration (5-300 mM) had only small effects on the rates of inactivation and recovery from inactivation (tau recovery approximately 1 s). Mutation of residues at a putative regulatory site at R487 in the outer pore mouth did not affect slow inactivation or recovery from inactivation of hKv1.5, although sensitivity to extracellular TEA was conferred. 4. Symmetrical reduction of both intra- and extracellular cation concentrations accelerated and augmented both components of inactivation of K+ (Kd = 34.7 mM) and Cs+ (Kd = 20.5 mM) currents. These effects could be quantitatively accounted for by unilateral reduction of intracellular K+ (K+i) (Kd = 43.4 mM) or Cs+i with constant 135 mM external ion concentrations. 5. We conclude that inactivation and recovery from inactivation in hKv1.5 were not typically C-type in nature. However, the ion species dependence of inactivation was still closely coupled to ion permeation through the pore. Intracellular ion modulatory actions were more potent than extracellular actions, although still of relatively low affinity. These results suggest the presence of ion binding sites capable of regulating inactivation located on both intracellular and extracellular sides of the pore selectivity filter.  (+info)

Gating current studies reveal both intra- and extracellular cation modulation of K+ channel deactivation. (6/3963)

1. The presence of permeant ions can modulate the rate of gating charge return in wild-type human heart K+ (hKv1.5) channels. Here we employ gating current measurements in a non-conducting mutant, W472F, of the hKv1.5 channel to investigate how different cations can modulate charge return and whether the actions can be specifically localized at the internal as well as the external mouth of the channel pore. 2. Intracellular cations were effective at accelerating charge return in the sequence Cs+ > Rb+ > K+ > Na+ > NMG+. Extracellular cations accelerated charge return with the selectivity sequence Cs+ > Rb+ > Na+ = NMG+. 3. Intracellular and extracellular cation actions were of relatively low affinity. The Kd for preventing slowing of the time constant of the off-gating current decay (tau off) was 20.2 mM for intracellular Cs+ (Cs+i) and 358 mM for extracellular Cs+ (Cs+o). 4. Both intracellular and extracellular cations can regulate the rate of charge return during deactivation of hKv1.5, but intracellular cations are more effective. We suggest that ion crystal radius is an important determinant of this action, with larger ions preventing slowing more effectively. Important parallels exist with cation-dependent modulation of slow inactivation of ionic currents in this channel. However, further experiments are required to understand the exact relationship between acceleration of charge return and the slowing of inactivation of ionic currents by cations.  (+info)

Phospholipid-subclass-specific partitioning of lipophilic ions in membrane-water systems. (7/3963)

Herein, we systematically investigate phospholipid-subclass-specific alterations in the partitioning of both cationic and anionic amphiphiles to identify the importance of ester, ether and vinyl ether linkages at the sn-1 position of phospholipids in the partitioning of charged amphiphiles. The results demonstrated that the membrane-water partition coefficient of a prototypic cationic amphiphile (i.e. 3,3'-dipropylthiadicarbocyanine iodide) was approximately 2.5 times higher in membranes comprised of plasmenylcholine in comparison with membranes comprised of either phosphatidylcholine or plasmanylcholine. In striking contrast, the membrane-water partition coefficient of a prototypic anionic amphiphile [i.e. bis-(1,3-dibutylbarbituric acid)trimethine oxonol] in membranes comprised of plasmenylcholine was approximately 2.5 times lower than that manifest in membranes comprised of phosphatidylcholine or plasmanylcholine. Utilizing theseexperimentally determined partition coefficients,the relative membrane dipole potential of membranes comprised of plasmenylcholine was calculated and found to be approximately 25 mV lower than in membranes comprised of phosphatidylcholine or plasmanylcholine. This lower membrane dipole potential in membranes comprised of plasmenylcholine is equivalent to the membrane potential induced by incorporation of approximately 25 mol% of anionic phospholipids in membranes comprised of phosphatidylcholine. Collectively, these results demonstrate that phospholipid-subclass-specific differences in the membrane dipole potential contribute to alterations in the partitioning of lipophilic ions in membrane bilayers comprised of distinct phospholipid subclasses. Moreover, they suggest that these physicochemical differences can be exploited to facilitate the targeting of charged lipophilic drugs to specific cells and subcellular membrane compartments.  (+info)

Partitioning of triphenylalkylphosphonium homologues in gel bead-immobilized liposomes: chromatographic measurement of their membrane partition coefficients. (8/3963)

Unilamellar liposomes of small or large size, SUVs and LUVs, respectively, were stably immobilized in the highly hydrophilic Sepharose 4B or Sephacryl S-1000 gel beads as a membrane stationary phase for immobilized liposome chromatography (ILC). Lipophilic cations of triphenylmethylphosphonium and tetraphenylphosphonium (TPP+) have been used as probes of the membrane potential of cells. Interaction of TPP+ and triphenylalkylphosphonium homologues with the immobilized liposomal membranes was shown by their elution profiles on both zonal and frontal ILC. Retardation of the lipophilic cations on the liposome gel bed was increased as the hydrophobicity of the cations increased, indicating the partitioning of lipophilic cations into the hydrocarbon region of the membranes. The cations did not retard on the Sepharose or Sephacryl gel bed without liposomes, confirming that the cations only interact with the immobilized liposomes. Effects of the solute concentration, flow rate, and gel-matrix substance on the ILC were studied. The stationary phase volume of the liposomal membranes was calculated from the volume of a phospholipid molecule and the amount of the immobilized phospholipid, which allowed us to determine the membrane partition coefficient (KLM) for the lipophilic cations distributed between the aqueous mobile and membrane stationary phases. The values of KLM were generally increased with the hydrophobicity of the solutes increased, and were higher for the SUVs than for the LUVs. The ILC method described here can be applied to measure membrane partition coefficients for other lipophilic solutes (e.g., drugs).  (+info)

Cation-π interaction is a non-covalent binding force that plays a significant role in protein stability and drug-receptor interactions. In this work, we have investigated the structural role of cation-π interactions in sugar-binding proteins (SBPs). We observed 212 cation-π interactions in 53 proteins out of 59 SBPs in dataset. There is an average one energetically significant cation-π interaction for every 66 residues in SBPs. In addition, Arg is highly preferred to form cation-π interactions, and the average energy of Arg-Trp is high among six pairs. Long-range interactions are predominant in the analyzed cation-π interactions. Comparatively, all interaction pairs favor to accommodate in strand conformations. The analysis of solvent accessible area indicates that most of the aromatic residues are found on buried or partially buried whereas cationic residues were found mostly on the exposed regions of protein. The cation-π interactions forming residues were found that around 43% of cation-π
Engineering of mixed-valence (MV) radical cations and intermolecular complexes based on pi-extended tetrathiafulvalenes (TTFs) is central for the development of organic conductors. On another front, redox-controlled dimerization of radical cations has recently been recognized as an important tool in supramolecular chemistry. Here we show that pi-extended TTFs based on the indenofluorene core, prepared by Horner-Wadsworth-Emmons reactions, undergo reversible and stepwise one-electron oxidations and that the detectable, intermediate radical cation forms remarkably strong intermolecular MV ([neutral.cation]) and pi-dimer ([cation.cation]) complexes with near-infrared radical cation absorptions. The radical cation itself seems to be a so-called Class III MV species in the Robin-Day classification. The formation of MV dimers was corroborated by ESR spectroelectrochemical studies, revealing two slightly different ESR signals upon oxidation, one assigned to the MV dimer and the other to the cation monomer.
In this work, we have analyzed the influence of cation-pi interactions to the stability of Sm/LSm assemblies and their environmental preferences. The number of interactions formed by arginine is higher than lysine in the cationic group, while histidine is comparatively higher than phenylalanine and tyrosine in the pi group. Arg-Tyr interactions are predominant among the various pairs analyzed. The furcation level of multiple cation-pi interactions is much higher than that of single cation-pi interactions in Sm/LSm interfaces. We have found hot spot residues forming cation-pi interactions, and hot spot composition is similar for all aromatic residues. The Arg-Phe pair has the strongest interaction energy of -8.81 kcal mol(-1) among all the possible pairs of amino acids. The extent of burial of the residue side-chain correlates with the Delta Delta G of binding for residues in the core and also for hot spot residues cation-pi bonded across the interface. Secondary structure of the cation...-pi ...
Over the last several years, various gene delivery systems have been developed for gene therapy applications. Although viral vector-based gene therapy has led
TY - JOUR. T1 - Denatured and reversibly cationized p53 readily enters cells and simultaneously folds to the functional protein in the cells. AU - Murata, Hitoshi. AU - Sakaguchi, Masakiyo. AU - Futami, Junichiro. AU - Kitazoe, Midori. AU - Maeda, Takashi. AU - Doura, Hideki. AU - Kosaka, Megumi. AU - Tada, Hiroko. AU - Seno, Masaharu. AU - Huh, Nam Ho. AU - Yamada, Hidenori. PY - 2006/5/16. Y1 - 2006/5/16. N2 - Cationization is a powerful strategy for internalizing a protein into living cells. On the other hand, a reversibly cationized denatured protein through disulfide bonds is not only soluble in water but also able to fold to the native conformation in vitro. When these advantages in cationization were combined, we developed a novel method to deliver a denatured protein into cells and simultaneously let it fold to express its function within cells. This in-cell folding method enhances the utility of recombinant proteins expressed in Escherichia coli as inclusion bodies; that is, the ...
The visible light combined with photosensitizers (PSs) is exploited in both antitumoral and antimicrobial fields inducing a photo-oxidative stress within the target cells. Among the different PSs, porphyrins belong to the family of the most promising compounds to be used in clinical photodynamic applications. Although in the last years many porphyrins have been synthesised and tested, only a few reports concern the in vitro effects of the 5,15-diarylporphyrins. In this work, the activity of four 5,15-diarylporphyrins (compounds 7-10), bearing alkoxy-linked pyridinium appendixes, have been tested on cancer cell lines and against bacterial cultures. Among the synthetized PSs, compounds 7 and 9 are not symmetrically substituted porphyrins showing one cationic charge tethered at the end of one 4C or 8C carbon chains, respectively. On the other hand, compounds 8 and 10 are symmetrically substituted and show two chains of C4 and C8 carbons featuring a cationic charge at the end of both chains. The ...
Müller, A., Krickemeyer, E., Bögge, H., Schmidtmann, M., Botar, B., & Talismanova, M. O. (2003). Drawing small cations into highly charged porous nanocontainers reveals Water assembly and related interaction problems. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 42(18), 2085-2090. doi:10.1002/anie. ...
RESULTS: Viscometry first showed that these polymers display typical polysoap behaviour in hydro‐alcoholic mixtures. Fluorescence spectrometry was then used to characterize the corresponding intramolecular association with two complementary fluorescent probes. In addition to confirming macromolecular folding, pyrene provided information about the probe local environment polarity whereas a molecular rotor gave interesting complementary information about the compactness of the corresponding nano‐domains ...
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Synonyms for Cations, divalent in Free Thesaurus. Antonyms for Cations, divalent. 1 synonym for divalent: bivalent. What are synonyms for Cations, divalent?
View Notes - 0243Pb45anp2-09 from CHEM orgo at NYU. + + Both cations (these are NOT resonance forms - they are two separate cations) are captured - two steps please - to give the two final products.
Summary: This chapter focuses on changeover metals. All transition metal cations are toxic-the ones that are essential for Escherichia coli and belong to the main get redirected here transition period of the periodic program with the element and also the toxic-only metals with increased atomic figures. Prevalent themes are noticeable inside the metabolism of those ions. To start with, there is transport. Superior-price but minimal-affinity uptake techniques offer many different cations and anions on the cells. Charge of the respective systems is apparently mainly via regulation of transport action (flux Management), with Charge of gene expression enjoying just a slight role. If these units never deliver adequate amounts of a desired ion into the mobile, genes for ATP-hydrolyzing superior-affinity but very low-fee uptake techniques are induced, e.g., ABC transport methods or P-kind ATPases. However, if the level of an ion is in surplus, genes for efflux methods are induced. from this source By ...
The directed movement of inorganic cations with a valency of one into, out of, within or between cells. Inorganic cations are atoms or small molecules with a positive charge which do not contain carbon in covalent linkage ...
The directed movement of inorganic cations with a valency of one into, out of, within or between cells. Inorganic cations are atoms or small molecules with a positive charge which do not contain carbon in covalent linkage ...
What does the name Cation mean? Learn about the meaning, origin, popularity, and more! Explore the history of your surname at Findmypast.
1AEG: Artificial protein cavities as specific ligand-binding templates: characterization of an engineered heterocyclic cation-binding site that preserves the evolved specificity of the parent protein.
1AEE: Artificial protein cavities as specific ligand-binding templates: characterization of an engineered heterocyclic cation-binding site that preserves the evolved specificity of the parent protein.
Structural Diversity and Thermochromic Properties of Iodobismuthate Materials Containing d-Metal Coordination Cations: Observation of a High Symmetry [Bi3I11]2− Anion and of Isolated I− Anions
Buy our Recombinant Human M6PR (cation dependent) protein. Ab80157 is a protein fragment produced in Escherichia coli and has been validated in WB, ELISA…
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Article: Teamwork allows people to discuss their work together, and as a result, to grow professionally. To be successful, the teacher and para-educator must view themselves as a team and partners in the educational process ...
1776. Somme des cations échangeables (S) : Somme des cations métalliques échangeables exprimée en milliéquivalents-grammes pour 100 grammes de complexe absorbant ...
TY - JOUR. T1 - Cationic lipid-mediated NGF gene transfection increases neurofilament phosphorylation. AU - Yang, K.. AU - Xue, J. J.. AU - Qiu, Y. H.. AU - Perez-Polo, J. R.. AU - Whitson, J.. AU - Faustinella, F.. AU - Kampfl, A.. AU - Zhao, X.. AU - Iwamoto, Y.. AU - Mu, X. S.. AU - Clifton, G.. AU - Hayes, R. L.. PY - 1996/12/31. Y1 - 1996/12/31. N2 - We examined the effect of cationic lipid-mediated gene transfection of nerve growth factor (NGF) in primary septo-hippocampal cell cultures. Rat NGF cDNA was subcloned into a pUC19-based plasmid containing a CMV promoter. Two days after NGF gene transfection in primary cell cultures, ELISA confirmed increases in NGF protein secretion from transfected cells. To study the biological effect of cationic lipid-mediated NGF gene transfection, we analyzed the amount of neurofilament protein from NGF-transfected cell cultures. Western blot and immunohistochemical analyses detected significant increases in the phosphorylated form of neurofilament ...
Non-viral vectors based on cationic niosomes as efficient gene delivery vehicles to central nervous system cells into the brain Academic Article 2018 ...
The dyes were first introduced by Hoechst, based on ß-sulphato ethyl sulphone as a reactive group. The range made the successful breakthrough due to comprehensive shade range, versatile application, ability to be dyed at 60°C and good compatibility with other bifunctional dyes. Being a compact structure, it offers ease in wash off for removal of unfixed dyes at the end of dyeing during washing. The dye fibre bond offers good acid stability. With the limitations to above, there may be problems with reproducibility associated with it, which is not accepted especially for pale shades. There is the possibility of unlevel dyeing with a small variation in the process due to its lower molecular weight. Hetero bifunctional dyes made a get through in early 80s. The dyes were based on a quite simple but beautiful chemistry. They had filled a big vacuum of various hues of bright shades, which were not possible with vinyl sulphone type. The dyes were conventional dichlorotriazine type, with the end ...
The well-known Toll like receptor 9 (TLR9) agonist CpG ODN has shown promising results as vaccine adjuvant in preclinical and clinical studies, however its in vivo stability and potential systemic toxicity remain a concern. In an effort to overcome these issues, different strategies have been explored including conjugation of CpG ODN with proteins or encapsulation/adsorption of CpG ODN into/onto liposomes. Although these methods have resulted in enhanced immunopotency compared to co-administration of free CpG ODN and antigen, we believe that this effect could be further improved. Here, we designed a novel delivery system of CpG ODN based on its conjugation to serve as anchor for liposomes. Thiol-maleimide chemistry was utilised to covalently ligate model protein with the CpG ODN TLR9 agonist. Due to its negative charge, the protein conjugate readily electrostatically bound cationic liposomes composed of 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), cholesterol and ...
(CYANOMETHYL)TRIPHENYLPHOSPHONIUM CHLORIDE 4336-70-3 NMR spectrum, (CYANOMETHYL)TRIPHENYLPHOSPHONIUM CHLORIDE H-NMR spectral analysis, (CYANOMETHYL)TRIPHENYLPHOSPHONIUM CHLORIDE C-NMR spectral analysis ect.
The barrier for the radical isomerization CH3Oo --, oCH2OH is calculated by CBS-QB3 to be 29.7 kcal mol-1 and lies higher (by 5.7 kcal mol-1) than the dissociation limit CH2O+Ho. Hence, CH3Oo does not isomerize to the more stable oCH2OH on its own. However, this barrier is reduced to 15.8 ... read more kcal mol-1 when the CH3Oo radical is coordinated with protonated methanol (CH3-Oo...H-O(H)-CH3+) and the CH3Oo --,oCH2OH rearrangement can now take place within the complex. This rearrangement, which results in the hydrogen-bridged radical cation oCH2-O(H)...H-O(H)-CH3+ can be viewed as an acid catalyzed rearrangement. The ion CH3-Oo...H-O(H)-CH3+ represents the most stable form of the methanol dimer radical cation. The ion oCH2-O(H)...H-O(H)-CH3+ can fragment directly to CH3OH2+ + oCH2OH or it can rearrange further to produce the hydrogen-bridged radical cation oCH2-O+(CH3)-H...OH2, which is the dimethylether ylid cation solvated by water. This species can dissociate to its components or tho ...
TY - JOUR. T1 - Radical cations of benzo[α]pyrene and 6-substituted derivatives. T2 - Reaction with nucleophiles and DNA. AU - Stack, D. E.. AU - Cremonesi, P.. AU - Hanson, A.. AU - Rogan, E. G.. AU - Cavalieri, E. L.. PY - 1995. Y1 - 1995. N2 - 1. Oxidation of benzo[α]pyrene (BP) by I2 in the presence of AgClO4 in benzene generates the BP+ ClO4- · AgI complex. This same method was used to produce radical cations from 6-FBP, 6-ClBP, 6-BrBP and 6-CH3BP. 2. Reaction of the BP, 6-FBP, 6-ClBP and 6-BrBP radical cation perchlorates with H2O produced BP 1,6-, 3,6- and 6,12- dione, whereas 6-CH3BP.+ ClO4- · AgI yielded 6-CH2OHBP. 3. When BP.+ ClO4- · AgI and 6-FBP.+ ClO4- · AgI were reacted with NaOAc in H2O/CH3CN (9:1), 6-OAcBP was formed, in addition to the quinones. In the case of 6-ClBP.+ ClO4- · AgI, a small amount of 1-OAc-6-ClBP and 3-OAc-6-ClBP was formed in addition to the diones, whereas for 6-BrBP and 6-CH3BP the reaction products were BP diones and 6-CH2OHBP respectively. 4. These ...
Antimicrobial peptides (AMPs) are a class of antimicrobial agents with broad-spectrum activities. Several reports indicate that cationic AMPs bind to the negatively charged bacterial membrane causing membrane depolarization and damage. However, membrane depolarization and damage may be insufficient to elicit cell death, thereby suggesting that other mechanism(s) of action could be involved in this phenomenon. In this study, we investigated the antimicrobial activity of a novel antimicrobial peptide, TP359, against two strains of Pseudomonas aeruginosa, as well as its possible mechanisms of action. TP359 proved to be bactericidal against P. aeruginosa as confirmed by the reduced bacteria counts, membrane damage and cytoplasmic membrane depolarization. In addition, it was non-toxic to mouse J774 macrophages and human lung A549 epithelial cells. Electron microscopy analysis showed TP359 bactericidal effects by structural changes of the bacteria from viable rod-shaped cells to those with cell membrane
A promising strategy to improve the immunogenic potential of DNA vaccines is the formulation of plasmid DNA (pDNA) with cationic liposomes. In this respect, particle size may be of crucial importance. This study aimed at the evaluation of high-pressure extrusion as a method for sizing cationic liposomes after entrapment of pDNA. This is a well-known sizing method for liposomes, but so far, it has not been applied for liposomes that are already loaded with pDNA. Liposomes composed of egg PC, DOTAP, and DOPE with entrapped pDNA were prepared by the dehydration-rehydration method and subjected to various extrusion cycles, comparing different membrane pore sizes and extrusion frequencies. At optimized extrusion conditions, liposome diameter (Zave) and polydispersity index (PDI) were reduced from 560 nm and 0.56 to 150 nm and 0.14 respectively, and 35% of the pDNA was retained. Importantly, gel electrophoresis and transfection experiments with pDNA extracted from these extruded liposomes demonstrated ...
Qilei Zhu, Emily C. Gentry, Robert R. Knowles:. https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201604619. ABSTRACT: A new catalytic method is described to access carbocation intermediates via the mesolytic cleavage of alkoxyamine radical cations. In this process, electron transfer between an excited state oxidant and a TEMPO‐derived alkoxyamine substrate gives rise to a radical cation with a remarkably weak C−O bond. Spontaneous scission results in the formation of the stable nitroxyl radical TEMPO. as well as a reactive carbocation intermediate that can be intercepted by a wide range of nucleophiles. Notably, this process occurs under neutral conditions and at comparatively mild potentials, enabling catalytic cation generation in the presence of both acid sensitive and easily oxidized nucleophilic partners.. ...
TY - JOUR. T1 - Cu(I) recognition via cation-π and methionine interactions in CusF. AU - Xue, Yi. AU - Davis, Anna V.. AU - Balakrishnan, Gurusamy. AU - Stasser, Jay P.. AU - Staehlin, Benjamin M.. AU - Focia, Pamela. AU - Spiro, Thomas G.. AU - Penner-Hahn, James E.. AU - OHalloran, Thomas V.. PY - 2008/2. Y1 - 2008/2. N2 - Methionine-rich motifs have an important role in copper trafficking factors, including the CusF protein. Here we show that CusF uses a new metal recognition site wherein Cu(I) is tetragonally displaced from a Met 2His ligand plane toward a conserved tryptophan. Spectroscopic studies demonstrate that both thioether ligation and strong cation-π interactions with tryptophan stabilize metal binding. This novel active site chemistry affords mechanisms for control of adventitious metal redox and substitution chemistry.. AB - Methionine-rich motifs have an important role in copper trafficking factors, including the CusF protein. Here we show that CusF uses a new metal ...
Semple, SC, Akinc, A, Sandhu, A, Mui, B, Chow, C, Sah, D, Stebbing, D, Crosley, E, Hafez, I, Dorkin, JR, Qin, J, Lam, K, Wong, K, Nechev, L, Eisenhardt, ML, Jayaraman, M, Kazem, M, Maier, M, Srinivasulu, M, Weinstein, M, Chen, Q, Alvarez, R, Barros, S, Klimuk, SK, Borland, T, Kosovrasti, V, Tam, Y, MacLachlan, I, Manoharan, M, Ciufolini, MA, Tracy, M, de Fougerolles, A, Cullis, PR, Madden, TD, Hope, ...
Experimental and Theoretical Examination of the Radical Cations Obtained from the Chemical and Electrochemical Oxidation of 5-AminothiazolesExperimental and Theoretical Examination of the Radical Cations Obtained from the Chemical and Electrochemical Oxidation of 5-Aminothiazoles ...
Non-stop carbocationic polycyclizations of isoprenoids have been called the most complex chemical reactions occurring in nature. We describe a strategy for the initiation of tail-to-head polycyclization that relies on the sequestration of the counteranion away from the carbocation, which allows full propagation of the cationic charge. If the anion is mobile, Coulombic forces hold this species in close proximity to the carbocation and cause preemptive termination through elimination. Anion sequestration is crucial for effecting the biomimetic synthesis of complex and unstable terpenes, including the highly strained funebrenes. This study illustrates the deleterious role of the counterion in tail-to-head carbocationic polycyclization reactions, which to the best of our knowledge has not been rigorously explored. These observations are also expected to find use in the design and control of cationic polycyclization along biosynthetic pathways that have previously been inaccessible in bulk solvent ...
TY - JOUR. T1 - The dithiacyclooctane cation (DTCO+). T2 - Conformational analysis, interconversion barriers and bonding. AU - Stowasser, Ralf. AU - Glass, Richard S. AU - Hoffmann, Roald. PY - 1999/7. Y1 - 1999/7. N2 - A theoretical conformation analysis of the dithiacyclooctane radical cation (DTCO+) suggests that the lowest energy conformer is a chair-boat, with a partial but significant S-S σ bond. For the ring flip process of this molecule we calculate a barrier of 40 kJ mol-1 and two possible pathways: one involves a boat-boat conformer and an untwisted transition structure, the other a chair-chair conformer and a twisted transition structure.. AB - A theoretical conformation analysis of the dithiacyclooctane radical cation (DTCO+) suggests that the lowest energy conformer is a chair-boat, with a partial but significant S-S σ bond. For the ring flip process of this molecule we calculate a barrier of 40 kJ mol-1 and two possible pathways: one involves a boat-boat conformer and an ...
Histochemical and morphological research increasingly relies upon quanti cation of complex biological systems. For such investigations to be meaningful, quanti cation techniques must meet the seemingly conflicting requirements of being theoretically robust, yet sufficiently practical to facilitate widespread applicability. Validity ought to be enhanced by theoretical simplicity, use of measured rather than assumed variables, and minimising observer interpretation. Practicality is facilitated by simplifying and reducing measurements, broadening applicability, and reducing costs and analysis time. As a result, quanti cation systems that rely upon sampling and estimation have been favoured over serial reconstruction techniques. To provide reliable estimates, sampling must be valid at all levels from tissue harvest, to the selection of microscope fields in which quanti cation is performed by techniques that account for the anisotropic distribution, and variable size of many elements in biological ...
Positively charged cations and negatively charged anions attract one another. Conversely, cations repel one another as do anions.. Electrostatic attraction is indiscriminate. That is a cation can attract more than one anion and visa versa. The result is that cation-anions attractions form a large array that we call an ionic compound or salt. The bonds holding these ions together are called ionic bonds. However, this array has a very specific composition completely dictated by the charges on the cations and anions.. Formulas of ionic compounds:. The composition of ionic compounds is determined by the requirement that the compounds must be electrically neutral. That is that the charges of the cations and anions must balance or cancel out one another. For example consider sodium cations (Na+) and Chlorine anions (Cl ). Sodium has a positive 1 charge and chloride has a negative 1 charge. Thus one sodium cation cancels one chloride anion (+1 + 1 = 0) resulting in the formula Na1Cl1 or NaCl. ...
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We present a detailed analysis of the anomalous carbocations: C2H5+ and C3H3+. This work involves (a) probing electronic structural properties, (b) ab initio dynamics simulations over a range of internal energies, (c) analysis of reduced dimensional potential surfaces directed along selected conformational t
View Notes - Lecture21outline from CHEM 0740 at Pittsburgh. I. Review Nucleophiles generally add to anomeric carbocations from the axial face This is a result of the anomeric effect that states that
Compartment GO Term. serotonin-activated cation-selective channel complex onclick=removeFacet(Compartment GO Term/serotonin-activated cation-selective channel complex)> Compartment GO Term serotonin-activated cation-selective channel complex ...
Page contains details about cationic liposomes 9:1 . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Radical cations and dications of [n]CPP from n = 5 to n = 12 have been studied by Raman spectroscopy and density functional theory. Small [n]CPP dications owe their stability to the closed-shell electronic structure imposed by cyclic conjugation surpassing the destabilizing effect of ring strain and of the e
eng] Geometries and binding energies of complexes of cations with benzene, [2.2]paracyclophane and a [2.2]paraheterocyclophane are computed and compared using ab initio calculations. [2.2]Paracyclophane is not used for building cation receptors because of its small cavity. Here, we demonstrate that its binding capability toward cations using one aromatic ring is superior to benzene in 10 kcal/mol. This unexpected difference is explained by the reduction, upon complexation, of the repulsive interaction of the psystems, which is due to the close proximity of the two benzene rings. Experimental results derived from the analysis of X-ray structures retrieved from the CSD support this explanation ...
C1-CBP-vancomycin: Impact of a vancomycin C-terminus trimethylammonium cation on pharmacological properties and insights into its newly introduced mechanism of action ...
Used for cation analysis by Ion Chromatography, these standards for cation analysis can be used for primary calibration or to prepare second source calibration check standards.
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...and I dont have the photo to prove it! Does a meet up really happen if theres no photographic evidence? Last Thursday Cation Designs, Morgan of Crab & Bee, Meris of The Fabric Alchemist, and I met up for brunch at Lola in downtown Seattle. Cation Designs was in town for a few days, and her visit was the…
Buryi, VA ; Morel, Nicole ; Godfraind, Theophile. Model of cation channel gating.In: Progress in Biophysics & Molecular Biology, Vol. 65, p. PC330-PC330 (1996 ...
During the study of the radical induced DNA strand cleavage, we observed the appearance of a radical cation at the carbohydrate backbone.1 This radical cation is a strong oxidant that can be reduced by an adjacent guanosine (G).2 The so formed guanine
An atom with more protons than electrons, giving it a net positive charge. For example, a sodium atom becomes a cation when it transfers an electron to a chlorine atom to form sodium chloride. See also Ion and Anion.. ...
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Waters offers an array of products for ion chromatography . IC-Pak resin based columns allow you to analyze a full range of ions from numerous sample matrices, both simple and complex. They offer an exceptional linear loading range of less than 1.0 ppb to greater than 400 ppm without dilution and without pH limitation on eluent or sample. The flexibility exists for accurate and reproducible anion and cation analyses at all concentration levels.
Wolf, R., Dommröse, A. - M., & Grützmacher, H. - F. (1988). Destabilized carbenium ions: secondary and tertiary [alpha]-carbomethoxybenzyl cations. Organic Mass Spectrometry, 23(1), 26-32. doi:10.1002/oms. ...
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Maximum efficiency of cation hydrolysis will be shown by? a) \(\sf Al^{+3}\) b) \(\sf Tl^{+3}\) c) \(\sf Tl^{+1}\) d) \(\sf Ga^{+3}\)The answer i...
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Cations are positively charged ions and anions are negatively charged ions. Metals act as cations and willingly give up or donate electrons to nonmetals. Nonmetals act as anions and accept donated...
Ionic bonds consist of ions in a ratio that result in electrical neutrality. They consist of a metal (cation) and a nonmetal (anion). Metals are cations since they give electrons, whereas nonmetals are anions because they gain electrons. On the other hand, covalent bonds consist of electrically neutral molecules. They consist of a pair of electrons shared between two atoms, typically nonmetals ...
A hydride shift is a rearrangement of atoms in which an unstable carbocation is transformed into a more stable one. Carbocations are ions with positively charged carbon atoms and are often found in...
well im studied C3 further science, and these have really got to me? not a clue what they are on about on the revision booklet i have, or on any of the revision notes i have come across on here? i dont know what are example and what i need to remember for my exam? any help?. ...
வேதியியலில் உப்பு (salt) என்பது ஒரு காடியும், காரமும் சேர்ந்து வேதியியல் வினைப்படும் பொழுது நடுமை அடைகையில் உருவாகும் பொருள். உப்புகள் மின்ம முனைப்படும் சேர்மங்கள் ஆகும். உப்புகளில் நேர்மின்மம் கொண்ட நேர்முனையி அல்லது கேட்டயான் (cation) பகுதியும், எதிர்மின்மம் கொண்ட எதிர்முனையி அல்லது ஆனையான் (anion) பகுதியும் கொண்ட ஆனால் மொத்தமாக மின்மம் ஏதுமற்ற, மின்மநடுநிலை கொண்ட ஒரு பொருள். ...
... silylium cations; [E(bipy)2]3+ (E = P, As, Sb, Bi) cations; cationic 4 coordinate Pv and Sbv derivatives) and transition-metal ... and borenium cations, and its application to these and various other boron compounds has been reviewed. The Gutmann-Beckett ... 3 and synthons for EI and Ev cations", Chemical Sciences, 2015, 6, 6545-6555. doi: 10.1039/C5SC02423D J.M. Bayne and D.W. ...
"Complex Fluoro Cations. II. Tetrafluoronitrogen(V) Cation, NF4+. Synthesis and Properties of NH4+AsF6−". Inorganic Chemistry. 5 ... The hexafluorochlorine (VII) cation, CIF6+, K. O. Christe, Inorg. Nucl. Chem. Lett. 8, 751, (1972) Christe, Karl O. (1973). " ... In this context, he synthesized the bent pentazenium cation, N5+, and was the first to experimentally detect the cyclic ... cation, CIF6". Inorganic and Nuclear Chemistry Letters. 8 (8): 741-745. doi:10.1016/0020-1650(72)80129-6. Chem.usc.edu ...
Unlike its heavier congeners, it is not known to form a simple B3+ or hydrated [B(H2O)4]3+ cation. The small size of the boron ... It is not known to form a cation. Silicon can form alloys with metals such as iron and copper. It shows fewer tendencies to ... Whether or not germanium forms a cation is unclear, aside from the reported existence of the Ge2+ ion in a few esoteric ... Sources mentioning germanium cations include: Powell & Brewer who state that the cadmium iodide CdI2 structure of germanous ...
ISBN 0-13-879932-6. Kolle, U.; Grub, J. (1985). "Permethylmetallocene: 5. Reactions of Decamethylruthenium Cations". J. ...
Divalent cations (e.g. Mg2+) are also required for integrin-ligand binding. Integrin ligands ICAM-1 and VCAM-1 are activated by ...
The first hydrolysis step is given generically as M(H2O)nm+ + H2O ⇌ M(H2O)n−1(OH)(m−1)+ + H3O+ Thus the aqua cations behave as ... The salt also dissociates into its constituent anions and cations. For example, sodium acetate dissociates in water into sodium ... ISBN 0-471-97058-1. Baes, Charles F.; Mesmer, Robert E. (1976). The Hydrolysis of Cations. New York: Wiley. ISBN 9780471039853 ... Water spontaneously ionizes into hydroxide anions and hydronium cations. ...
... stabilize unusual cations. The first cationic derivative of alane, [H2Al(PMDTA)]+[AlH4]− was prepared by treating ...
... the Base Cation Saturation Ratio. While he did not discover cation exchange in the soil as is sometimes supposed, he may have ... The basic cation saturation ratio concept and lime and potassium recommendations on Delaware's Coastal Plain soils. Soil Sci. ... and at some point he came to the conclusion that the ideal balance of cations in the soil was "H, 10%; Ca, 60 to 75% optimal 69 ... Rothamsted Research A review of the use of the basic cation saturation ratio and the ideal soil - PMM Kopittke, W Neal Bruce, R ...
Baes, C. F.; Mesmer, R. E. (1976). The Hydrolysis of Cations. New York: Wiley. Payghan, Santosh (2008). "Potential Of ...
Hurwitz, Matt (October 13, 2016). "Stay...cation..." ICG Magazine. Los Angeles: The International Cinematographers Guild, IATSE ...
Proton channels Voltage-gated proton channels Non-selective cation channels: These non-selectively allow many types of cations ... Cation channels of sperm: This small family of channels, normally referred to as Catsper channels, is related to the two-pore ... These channels are permeable to the monovalent cations K+ and Na+. There are 4 members of this family, all of which form ... These channels are primarily permeable to monovalent cations such as K+ and Na+. They are also permeable to Ca2+, though it ...
... and tri-cations with formula [L3BX]2+ and [L4B]3+, respectively. Other reported boron cations are dibora-dications (bis( ... For this reaction to yield the desired borenium cation, the ligand must be a good leaving group and the neutral donor must have ... In this method, halide abstraction by a Lewis acid such as AlCl3 results in a borenium cation and AlCl4− anion. The first ... For example, the BH2NH3+ cation has a natural charge of +0.687 on boron. Depending on the nature of the ligands around the ...
Oxidation affords the dithiadiazolium cations. Chloride salts of diithiadiazolium cation can be prepared by the reaction of ...
Both a cation and a dication are known. The dication HB2+ can be supported by a σ-donating ligand framework with two links. The ... and tri-cations". Dalton Transactions (45): 6421-6. doi:10.1039/b810575h. PMID 19002329.. ...
Bloomfield, VA (1997). "DNA condensation by multivalent cations". Biopolymers. 44 (3): 269-82. CiteSeerX 10.1.1.475.3765. doi: ... inorganic cations, polyamines, protamines, peptides, lipids, liposomes and proteins). Condensation of long double-helical DNAs ...
Free alkyls occur as neutral compounds, as anions, or as cations. The cations are called carbocations. The anions are called ... Typically alkyl cations are generated using super acids, alkyl anions are observed in the presence of strong bases, and alkyl ...
In this phase, REEs occur as mobile cations (i.e. REE3+), hydrated cations (i.e. [REE(H2O)n]3+or a part of positively charged ...
... so named because positively charged cations tend to move towards it. Contrast anode. cathode ray cation A positively charged ... Contrast cation. annihilation In particle physics, the process that occurs when a subatomic particle collides with its ...
http://telugucineblitz.blogspot.com/2015/08/chettu-kinda-pleader-1989.html "Chettu Kinda Pleader (Cast & Crew)". Movie Cation ...
2014). "Functionalized graphene sheets coordinating metal cations". Carbon. 75: 81-94. doi:10.1016/j.carbon.2014.03.036.. ... 2011). "Exfoliated graphene ligands stabilizing copper cations". Carbon. 49 (10): 3375-3378. doi:10.1016/j.carbon.2011.03.056. ... "Functionalized graphene sheets coordinating metal cations". Carbon. 75: 81-94. doi:10.1016/j.carbon.2014.03.036. Yamada, Y.; ... "Exfoliated graphene ligands stabilizing copper cations". Carbon. 49 (10): 3375-3378. doi:10.1016/j.carbon.2011.03.056. Yamada, ...
Structurally, these cations resemble guanidinium cations. The CN2S core is planar and the C-N bonds are short. Salts comprising ...
For example, the cyclopentadienyl anion and the cycloheptatrienylium cation are both considered to be aromatic ions, and the ... The concept was developed to explain the extraordinary stability and high basicity of the guanidinium cation. Guanidinium is ... 2. Y-Conjugated anions and cations". J. Am. Chem. Soc. 112 (11): 4177-4182. doi:10.1021/ja00167a011. Caminiti, R.; Pieretti, A ... Other examples of aromatic ions include the cyclopropenium cation (2 π-electrons) and cyclooctatetraenyl dianion (10 π ...
Outcomes of the workshop, Engaging global conversations on recognition of TVET quali cations based on learning outcomes, 25-27 ... Kuala Lumpur, Malaysian Quali cations Authority. NQAUAE. 2012. Qualifications Framework Emirates Handbook. Abu Dhabi, NQAUAE. ...
In the simplest case, the cation is a metal atom and the anion is a nonmetal atom, but these ions can be of a more complex ... In doing so, cations are formed. An atom of another element (usually nonmetal) with greater electron affinity accepts one or ... However, the ions themselves can be complex and form molecular ions like the acetate anion or the ammonium cation. For example ... As a result, weakly electronegative atoms tend to distort their electron cloud and form cations. Ionic bonding can result from ...
Such cations are analogous to carbocations. They have been characterized crystallographically when the organic substituents are ...
Divalent cations help coordinate the nucleotide. The general mechanism is shown in the figure below. Riboflavin kinase plays an ...
Gross, Michael L; K.A. Caldwell; D.E. Giblin; C.S. Hsu; D. Cox (1991). "Endohedral Complexes of Fullerene Radical Cations". ...
"Regulation of ROMK by extracellular cations". Biophysical Journal. 80 (2): 683-697. Bibcode:2001BpJ....80..683S. doi:10.1016/ ...
The triargon cation Ar+ 3 is linear, but has one Ar−Ar bond shorter than the other. Bond lengths are 2.47 and 2.73 ångströms. ... Argon methyl cations, (or methyliumargon) ArxCH3+ are known for n=1 to 8. CH3+ is a Y shape, and when argon atoms are added ... The argon trihydrogen cation is planar in shape, with an argon atom off the vertex of a triangle of hydrogen atoms. The ... The argon dihydrogen cation ArH+ 2 has been predicted to exist and to be detectable in the interstellar medium. However it has ...
Cations such as REE, U, Th, Hf, Pb, and Ti diffuse slowly out of zircons, and their measured quantities in the mineral are ... doi:10.1016/S0009-2541(96)00098-8. Cherniak, D.J.; Hanchar, J.M.; Watson, E.B. (1997). "Diffusion of tetravalent cations in ...
Allan Cations (10 October 1932 - 21 May 2015) was an Australian rules footballer who played for the Richmond Football Club in ... ISBN 978-1-921496-32-5. Allan Cationss playing statistics from AFL Tables. ...
While they are reactive intermediates, hydrogen bridged cations can be stabilized sterically. Hydrogen bridged cations are ... "Water-Catalyzed Interconversion of Conventional and Distonic Radical Cations: Methanol and Methyleneoxonium Radical Cation". ... Hydrogen-bridged cations are a type of charged species in which a hydrogen atom is simultaneously bonded to two atoms through ... In 1973, G. Olah was able to directly observe the 2-norbornyl cation by low-temperature NMR and confirm the presence of a non- ...
A-Putative-Cation-Channel-NCA-1-and-a-Novel-Protein-UNC-80-Transmit-Neuronal-Activity-in-C.-elegans-pbio.0060055.sv001.ogv 16 s ... A-Putative-Cation-Channel-NCA-1-and-a-Novel-Protein-UNC-80-Transmit-Neuronal-Activity-in-C.-elegans-pbio.0060055.sv002.ogv 20 s ... A-Putative-Cation-Channel-NCA-1-and-a-Novel-Protein-UNC-80-Transmit-Neuronal-Activity-in-C.-elegans-pbio.0060055.sv003.ogv 11 s ... A-Putative-Cation-Channel-NCA-1-and-a-Novel-Protein-UNC-80-Transmit-Neuronal-Activity-in-C.-elegans-pbio.0060055.sv004.ogv 33 s ...
The dihydrogen cation or hydrogen molecular ion is a cation (positive ion) with formula H+. 2. It consists of two hydrogen ... An electron is knocked off leaving the cation behind.[16] H2 + cosmic ray → H+. 2 + e− + cosmic ray.. Cosmic ray particles have ... 2 (ditritium cation). [4]. Quantum mechanical analysis[edit]. The Schrödinger equation (in the clamped-nuclei approximation) ... The dihydrogen cation has six isotopologues, that result from replacement of one or more protons by nuclei of the other ...
We are so excited to hear from you! We cant wait to virtually explore this years Vacation Bible School with you. -God Bless, Libby Burkhart and Alexis ...
cation exchange Process in which cations in solution are exchanged with cations held on the exchange sites of mineral and ... cation exchange Process in which cations in solution are exchanged with cations held on the exchange sites of mineral and ... cation exchange A Dictionary of Earth Sciences © A Dictionary of Earth Sciences 1999, originally published by Oxford University ... www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/cation-exchange ...
... has role antioxidant (CHEBI:22586) cyanidin cation (CHEBI:27843) has role metabolite (CHEBI:25212 ... cyanidin cation (CHEBI:27843) is a 5-hydroxyanthocyanidin (CHEBI:140277) cyanidin cation (CHEBI:27843) is conjugate acid of ... cyanidin cation (CHEBI:27843). cyanidin 3-O-rutinoside (CHEBI:28064) has functional parent cyanidin cation (CHEBI:27843). ... cyanidin cation (CHEBI:27843). cyanin (CHEBI:3978) has functional parent cyanidin cation (CHEBI:27843). cyanin betaine (CHEBI: ...
... is a elemental copper (CHEBI:37404) copper cation (CHEBI:23378) is a transition element cation ( ... copper(1+) (CHEBI:49552) is a copper cation (CHEBI:23378). copper(2+) (CHEBI:29036) is a copper cation (CHEBI:23378). copper(3+ ... CHEBI:23378 - copper cation. Main. ChEBI Ontology. Automatic Xrefs. Reactions. Pathways. Models. ...
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Triethylsilyl Cations. By J. B. Lambert, George A. Olah, Golam Rasul, Xing-ya Li, Herwig A. Buchholz, Graham Sandford, G. K. ... Triethylsilyl Cations. By J. B. Lambert, George A. Olah, Golam Rasul, Xing-ya Li, Herwig A. Buchholz, Graham Sandford, G. K. ... Triethylsilyl Cations. By J. B. Lambert, George A. Olah, Golam Rasul, Xing-ya Li, Herwig A. Buchholz, Graham Sandford, G. K. ...
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Introduction Cation is a drawless connection game for two players: Black and White. Its played on the intersections (points) ...
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Resorts, hotels offer school-cations amid coronavirus pandemic. A Four Seasons in Mexico is providing study buddies and ... "school-cations," allowing students to remotely attend school while on vacation with family. ... history and sports classes as a part of their school-cation program. ...
Some effects of divalent cations on binding and engulfment of several metal oxides and carbon particles are... ... Anionic Group Divalent Cation Peritoneal Macrophage Carbon Particle Fe203 Particle These keywords were added by machine and not ... Metzger G.V., Casarett L.J. (1967) Some Effects of Divalent Cations on In Vitro Phagocytosis. In: Luzio N.R.D., Paoletti R. ( ... Some effects of divalent cations on binding and engulfment of several metal oxides and carbon particles are described. ...
The preparation of betaine cations of methine dyes by three methods, viz., cyanine condensations of some quaternary salts and ...
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Agilent Technologies Inc. today announced the availability of new ion exchange and size exclusion columns specifically designed for the analysis of bio-molecules including monoclonal antibodies, recombinant proteins, peptides, vaccine products and DNA/RNA. The columns provide robust, reproducible and high-resolution solutions for biopharmaceutical manufacturers to effectively monitor the safety, efficacy and stability of their products.. ...
Uptake of potassium by bacteria is regulated by a single protein that senses the concentration of this cation both inside the ... Transient receptor potential vanilloid 2 (TRPV2), a Ca2+-permeable cation channel, plays vital roles in the regulation of ...
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Can you name the Common Monatoma Cations and Anions? Test your knowledge on this science quiz to see how you do and compare ... Science Quiz / Common Monatomic Cations Random Science Quiz Can you name the Common Monatoma Cations and Anions?. by ...
A cation exchange membrane is disclosed comprising fluorinated polymer layers which include, in order, a layer with sulfonic ... Cation exchange membrane and use. US4996098 *. Feb 28, 1989. Feb 26, 1991. E. I. Du Pont De Nemours And Company. Coated cation ... Electrolytic cation exchange membrane. US4490484 *. Oct 21, 1981. Dec 25, 1984. E. I. Du Pont De Nemours And Company. Membrane ... Cation exchange film and electrolytic tank with the same. WO2013137819A1 *. Mar 16, 2012. Sep 19, 2013. Technodye Dyingcolors ...
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Some amphiphilic cations block the mitochondrial apoptosis-induced channel, MAC.. Martinez-Caballero S1, Dejean LM, Kinnally KW ...
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WebMD provides information about interactions between Antacid Liquid-Simethicone II Oral and divalent-trivalent-cations- ... Tetracyclines/Divalent & Trivalent Cations Interactions. This information is generalized and not intended as specific medical ... Avidity of the tetracyclines for the cations of metal. Nature 1956 Mar 3;177(4505):433-4. ...
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Keywords: ACTIVATED SLUDGE; BIOPOLYMER; CATION; CHEMICAL OXYGEN DEMAND; EFFLUENT; IRON; POLYSACCHARIDE; PROTEIN; SOLUBLE ... Laboratory experiments and field tests were conducted to determine the effect of inorganic cations on effluent from activated- ... Laboratory experiments showed that monovalent cations tend to increase the concentration of solution biological polymers( ... biopolymers), whereas divalent cations tend to retain the biopolymers in the floc. Biopolymers in solution affect effluent ...
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  • Some effects of divalent cations on binding and engulfment of several metal oxides and carbon particles are described. (springer.com)
  • Laboratory experiments showed that monovalent cations tend to increase the concentration of solution biological polymers(biopolymers), whereas divalent cations tend to retain the biopolymers in the floc. (ingentaconnect.com)
  • The attachment or release of these microbially derived organic biopolymers and recalcitrant influent substrate may depend on the monovalent-to-divalent cation ratio and the concentration of iron. (ingentaconnect.com)
  • Importantly, Poisson-Boltzmann-type electrostatic potential calculations demonstrate that the divalent cations collectively control the electrostatic fit between bpDNase I and DNA. (nih.gov)
  • This channel opens rapidly after absorption of a photon to generate a large permeability for monovalent and divalent cations. (pnas.org)
  • Coordination to Divalent Cations by Calcium-Binding Proteins. (bioportfolio.com)
  • Arresting an Unusual Amide Tautomer Using Divalent Cations. (bioportfolio.com)
  • Effect of divalent cations on bovine serum albumin (BSA) and tannic acid interaction and its influence on turbidity and in vitro protein digestibility. (bioportfolio.com)
  • Tannins, proteins, and divalent cations interactions are important for many processes in the food industry and human and animal nutrition and health. (bioportfolio.com)
  • Cation diffusion facilitator (CDF) proteins are a conserved family of transmembrane transporters that ensure cellular homeostasis of divalent transition metal cations. (bioportfolio.com)
  • Laboratory experiments and field tests were conducted to determine the effect of inorganic cations on effluent from activated-sludge systems. (ingentaconnect.com)
  • Culinary stay-cations also serve as the perfect opportunity to get your family back on a healthy eating track, if you've fallen onto the fast food wagon. (howstuffworks.com)
  • I fell in love with the idea of stay-cations after taking my first one. (lifehack.org)
  • These antiporters mediate the exchange of monovalent cations, mainly Na + and K + , with one or two protons across the membrane. (nature.com)
  • f ) Permability ratios for different monovalent cations, as derived from changes of reversal potentials ( 31 ) of photocurrents when replacing Na + by the cation X + . Solutions used were: 115 mM XCl, 2 mM BaCl 2 , 1 MgCl 2 , pH 9. (pnas.org)
  • Groundwater interactions with surface-water systems greatly influence water quality characteristics such as cation , anion, nutrient, and dissolved organic matter concentrations, and even the fate and behavior of toxic pollutants. (wordnik.com)
  • Your island vibes are sure to shine in the Tommy Bahama® Beach-Cation camp shirt. (zappos.com)
  • Rated 5 out of 5 by tom hughes from beach-cation camp shirt I love the shirt. (tommybahama.com)
  • Can you name the Common Monatoma Cations and Anions? (sporcle.com)
  • Why do atoms of nonmetals form anions while atoms of metals form cations? (answers.com)
  • Nonmetals generally are more electronegative than metals, meaning that they have a stronger pull on their electrons - thus when they form ions, metals give up electrons (forming cations) and nonmetals take up electrons (forming anions). (answers.com)
  • How do cations and anions form? (answers.com)
  • What conclusions can we make about the size of cations neutral atoms and anions? (answers.com)
  • Cations are smaller then neutral atoms and anions are larger. (answers.com)
  • Why are cations smaller and anions larger in radii than their parent atoms? (answers.com)
  • Cations lose electrons, anions gain electrons. (answers.com)
  • Atoms of column 7A become anions when they react with atoms of group 1A elements, which become cations. (answers.com)
  • Both the cations and the anions are monovalent. (answers.com)
  • The cations and anions together form an ionically bonded compound. (answers.com)
  • How do the sizes of cations and anions relate to the atoms they form from? (answers.com)
  • Anions and cations are held together by ionic bonds. (answers.com)
  • are called ions - cations and anions. (answers.com)
  • Atoms of Metals lose electrons to empty their outer shell and become positive ions or cations.Atoms of non-metals gain electrons to fill their outer shell and become negative ions or anions. (answers.com)
  • Gaining or losing electrons atoms become ions (anions or cations). (answers.com)
  • Are the metal atoms cations or anions? (answers.com)
  • How does atomic radius vary with cations anions metals and nonmetals? (answers.com)
  • Any of a group of compounds composed of a cation, in which a central nitrogen atom is joined to four organic groups, and any of various anions, used as antiseptics, solvents, and emulsifying agents. (thefreedictionary.com)
  • The MARGA (Monitor for Aerosols and Gases in Ambient Air) provides a complete system to analyse anions and cations in aerosols, and gases in ambient air. (theengineer.co.uk)
  • These results improve our understanding of the essential role of cations in the biological function of bpDNase I. The high degree of conservation of the amino acids involved in the identified cation-binding sites across DNase I and DNase I-like proteins from various species suggests that our findings generally apply to all DNase I-DNA interactions. (nih.gov)
  • The substituents were systematically varied to investigate cation-π interactions in the S4 pocket, optimal heterocyclic stacking on the flat peptide walls lining the S1 pocket, and potential water replacements in both the S1 and the S4 pockets. (rcsb.org)
  • Since this is not an analysis of the stereochemistry of the metal first coordination spheres, any type of contact between a metal ion and other atoms was considered, independently of the type of metal cation, its oxidation state, its spin state, its coordination number, and independently of the type of atom(s) surrounding the metal and of the type of interatomic interactions (covalent, ionic). (mdpi.com)
  • The interactions between the metal cation and ATP are thought to be mostly electrostatic, guided by the cation's coordination preference. (nature.com)
  • We find that Coulomb interactions, both between ionized impurities and with the polarized nanocrystal surface, play a key role in cation exchange. (rug.nl)
  • Any element with a positive charge is called a cation and, for agricultural purposes, it refers to the basic cations, calcium (Ca+2), magnesium (Mg+2), potassium (K+1) and sodium (Na+1) and the acidic cations, hydrogen (H+1) and aluminum (Al+3). (wordnik.com)
  • A cation exchange membrane is disclosed comprising fluorinated polymer layers which include, in order, a layer with sulfonic exchange groups, a layer with carboxylic exchange groups, and a thinner layer with carboxylic exchange groups at a greater exchange capacity than the other carboxylic layer. (google.com)
  • A novel fluorinated cation exchange membrane containing carboxylic acid groups and sulfonic acid groups, both in the form of a specific pendant structure, the carboxylic acid groups being at least 20% on one surface of the membrane and gradually decreasing toward the innerside of the membrane, which. (google.com)
  • This invention relates to a novel fluorinated cation exchange membrane having both carboxylic acid groups and sulfonic acid groups, intermediates and starting materials for production thereof and also to processes for producing such materials. (google.com)
  • This invention also concerns a novel fluorinated cation exchange membrane having sulfonic acid groups with a high ion-exchange capacity and being provided with physically high strength. (google.com)
  • The cation exchange membrane according to the present invention can be used in electrolysis of an aqueous alkali metal halide solution under more severe conditions than those conventionally used while maintaining excellent performance stably for a long time. (google.com)
  • The greatest factor which controls the economy of the ion-exchange membrane process is the characteristic of the cation exchange membrane employed. (google.com)
  • It is necessary for the cation exchange membrane to satisfy the requirements as set forth below. (google.com)
  • In vertebrates, light-activated rhodopsin initiates a G protein-coupled enzyme cascade that ends in the hydrolysis of cGMP and the closure of the cGMP-regulated cation channels, thus hyperpolarizing the plasma membrane ( 1 - 3 ). (pnas.org)
  • Enables the transfer of cation from one side of a membrane to the other. (yeastgenome.org)
  • Strong acid styrene cation exchange resin is Styrene divinylbenzene copolymer with a sulfo radical. (tradekey.com)
  • Strong acid styrene cation exchange resin has the feature of high exchange capacity, fast exchanging speed, and good mechanical strength. (tradekey.com)
  • Strong acid styrene cation exchange resin is equivalent to America Amberlite IR-120, Dowex-50, Germany Lewatit-100, and Japan DisionSK-1. (tradekey.com)
  • Strong acid styrene cation exchange resin is mainly used for water softening, desalted water, pure water and high purity water preparation, also used for catalyst and dehydrating agent and wet metallurgy, purification of rare element, pharmaceutical, sugar industry, etc. (tradekey.com)
  • The ASTM D4519-compliant cation resin cartridge has a small diameter that allows ion exchange kinetics to achieve lower, more accurate readings than larger cartridges that leach. (mt.com)
  • It is the measurement of the electrolytic conductivity of a liquid sample (water) after that sample has passed through the CE800 Analyzer's ion exchange cation resin columns. (tenlinks.com)
  • Hydrogen-bridged cations are a type of charged species in which a hydrogen atom is simultaneously bonded to two atoms through partial sigma bonds. (wikipedia.org)
  • While best observable in the presence of superacids at room temperature, spectroscopic evidence has suggested that hydrogen-bridged cations exist in ordinary solvents. (wikipedia.org)
  • Figure 1 - Potential Energy Surface (PES) of (a) classical and (b) non-classical view of a hydrogen-bridged cation. (wikipedia.org)
  • Figure 2 - A molecular orbital diagram for open and closed hydrogen bridged cations with carbon is shown above. (wikipedia.org)
  • H] + (deuterium hydrogen cation). (wikipedia.org)
  • LOOK at the image title at the top that frontpage sends you to - it says " cation " which means it is an ABSTRACT with some info from the certifiCATE. (wordnik.com)
  • Please note that the groups of cations mentioned/discussed here do not refer to the groups of the periodic table! (wikibooks.org)
  • atoms lose electrons to form cations. (answers.com)
  • Cations are formed when atoms lose electrons and hence are smaller in size than the corresponding atoms. (answers.com)
  • Positive atoms: cations. (answers.com)
  • The presence of isolated metal cations, far from any other atom, is not uncommon in protein crystal structures. (mdpi.com)
  • It has been repeatedly observed that metal cations are sometimes isolated in protein crystal structures, far from any other atom [ 1 , 2 , 3 ]. (mdpi.com)
  • Generally speaking it is always possible to ionize an atom and produce +1 cation in vacuum, question is, will it survive contact with other elements/ions/molecules? (physicsforums.com)
  • A total of 200 pore volumes of recharge water are advected into the cell and, with each pore volume, the water is equilibrated with the minerals, cation exchanger, and the surfaces in the cell. (usgs.gov)
  • In the words of soil science, this functioning like a storage battery for minerals is called cation exchange capacity. (wordnik.com)
  • Alendronate-Functionalized Poly(2-oxazoline)s with Tunable Affinity for Calcium Cations. (bioportfolio.com)
  • Observations made by Saul Winstein and others suggested that highly delocalized and symmetric intermediates were present in the reactions of various substituted norbornyl cations, evidence for non-classical ions. (wikipedia.org)
  • Although poorly understood, cation-exchange reactions are increasingly used to dope or transform colloidal semiconductor nanocrystals (quantum dots). (rug.nl)
  • Here we report on our recent studies of organic radical cation reactions with various ligands. (osti.gov)
  • The potential energy diagram of this model is characterized by a single energy minimum, where the structure of the cation corresponds to the transition state between the two conformers of the classical view. (wikipedia.org)
  • However, many transition metals actually form cations, although there are some exceptions. (answers.com)
  • This example uses the phase-equilibrium, cation-exchange, and surface-complexation reaction capabilities of PHREEQC in combination with advective-transport capabilities to model the evolution of water in the Central Oklahoma aquifer. (usgs.gov)
  • The present invention relates to cation exchange membranes for electrochemical cells, and to their use, especially for the electrolysis of alkali metal chloride solutions to make relatively concentrated alkali metal hydroxide. (google.com)
  • Farm Stays' or 'Hay-cations' are the perfect summer getaway for suburbanites around the country looking for a way to teach their kids where their food comes from, and connect with the land. (foxnews.com)
  • Cation-exchange capacity for the clay ranges from 20 to 50 meq/100 g (milliequivalent per 100 grams), with an average clay content of 30 percent. (usgs.gov)
  • It binds and transports cations across membranes and uncouples oxidative phosphorylation while inhibiting ATPase of rat liver mitochondria. (bioportfolio.com)
  • The DCC1000e is a degassed cation conductivity system that provides ASTM D4519-compliant conductivity measurements for cycle chemistry monitoring. (mt.com)
  • The DCC1000e System is designed to measure the specific conductivity, cation conductivity and degassed cation conductivity in power plant cycle chemi. (mt.com)
  • Engineers responsible for steam turbine electric power generation systems will find the CE800 Cation Analyzer from Electro-Chemical Devices (ECD) provides a solution to the measurement of conductivity in water, which helps them protect boilers and steam turbines from corrosion. (tenlinks.com)
  • ECD's CE800 Analyzer Series is a family of on-line cation conductivity analyzers that have been designed with ECD's S80 Sensor and uT80 Transmitter. (tenlinks.com)
  • This encyclopedic resource provides extensively detailed, state-of-the-art information about cellular organic cation transporters and their relevance to human function and disease. (springer.com)
  • The first comprehensive theoretical investigation of aromaticity in functionalized corannulene cations of general formula [CH 3 -C 20 H 10 ] + was accomplished. (rsc.org)
  • ARTICLE{Raichle76measurementof, author = {M. E. Raichle and R. L. Grubb and J. Eichling and M. M. Ter-pogossian}, title = {Measurement of brain oxygen utilization with radioactive oxygen-15, experimental veri� cation}, journal = {J. Appl. (psu.edu)
  • Since cations tend to lose electrons, their atomic radius will decrease in size, as the other electrons will be 'pulled in' more by the protons in the nucleus (meaning stronger bond). (answers.com)
  • A systematic survey of the Protein Data Bank showed that nearly 8% of the metal cations are naked, more frequently if they can interact only electrostatically with their neighbors. (mdpi.com)
  • A systematic analysis of all naked cations found in the crystal structures deposited with Protein Data Bank was described in the present communication. (mdpi.com)
  • The predicted seven-transmembrane α helices of ChR2 are characteristic for G protein-coupled receptors but reflect a different motif for a cation-selective ion channel. (pnas.org)
  • Metal binding to the dynamic cytoplasmic domain of the cation diffusion facilitator (CDF) protein MamM induces a 'locked-in' configuration. (bioportfolio.com)
  • The transient receptor potential (TRP) protein superfamily consists of a diverse group of cation channels that bear structural similarities to Drosophila TRP. (sciencemag.org)
  • cation exchange Process in which cations in solution are exchanged with cations held on the exchange sites of mineral and organic matter , particularly on the surfaces of colloids of clay and humus . (encyclopedia.com)
  • P. Singla, R. Mehta and S. Upadhyay, "Clay Modification by the Use of Organic Cations," Green and Sustainable Chemistry , Vol. 2 No. 1, 2012, pp. 21-25. (scirp.org)
  • This innovative text explores the cellular transport of organic cations, from functional and structural properties to pharmacological implications and psychiatric developments. (springer.com)
  • The final chapters delve into the use of animal models for the study of organic cation transporter function and their possible use in environmental cycling of pharmaceutical residues. (springer.com)
  • article{osti_1358034, title = {The Chemistry of Separations Ligand Degradation by Organic Radical Cations}, author = {Mezyk, Stephen P. and Horne, Gregory P. and Mincher, Bruce J. and Zalupski, Peter R. and Cook, Andrew R. and Wishart, James F.}, abstractNote = {Solvent based extractions of used nuclear fuel use designer ligands in an organic phase extracting ligand complexed metal ions from an acidic aqueous phase. (osti.gov)
  • Functionally, CPAs are often classified based on two phenotypes, their ion selectivity, i.e., whether they transport Na + or K + , and their electrogenicity, i.e., whether a cation exchanges for one (electroneutral) or two (electrogenic) protons. (nature.com)
  • The capillary electrophoresis method for evaluation of cations concentration is based on differential migration and separation of cations in electric field due to the difference in their electrophoretic mobility. (environmental-expert.com)
  • Lithium (Li + ), a non-biogenic cation not known to have essential biological functions in mammals, is used (in the form of soluble salts) as a first-line medication for psychiatric diseases, in particular bipolar disorder 1 . (nature.com)
  • Earlier this year, Jack Harrowfield's Viewpoint focussing on the 1985 contribution of Tony McKervey's group to the field of calixarenes and cations generated an enthusiastic response, including suggestions on other articles that were also felt to have played a seminal role in calixarene chemistry. (rsc.org)
  • These observations suggest that changes in expression of cation-Cl- cotransporters may have a significant role in the ontogeny of neuronal Cl- homeostasis. (nih.gov)
  • So, instead of feeling like my run was holding me back from seeing the sights, I decided to turn it into a full-blown run-cation: A multi-day vacation that just happens to include running. (huffingtonpost.com)
  • We use density-functional theory and kinetic Monte Carlo simulations to develop a microscopic theory that explains structural, optical, and electronic changes observed experimentally in Ag-cation-exchanged CdSe nanocrystals. (rug.nl)
  • However, it is unclear how the negatively charged ATP triphosphate group binds Mg 2+ and Li + (i.e. which phosphate group(s) bind Mg 2+ /Li + ) and how the ATP solution conformation depends on the type of metal cation and the metal-binding mode. (nature.com)
  • We show that the solution ATP conformation depends on the cation and its binding site/mode, but it does not change significantly when Li + binds to Mg 2+ -loaded ATP. (nature.com)
  • optimizations on CASSCF level), how the singlet-triplet splitting of the mono-, 1,3-di- and 1,2,4-triaminocy- clopentadienyl cation depends on the out-of-plane angle between the substituent(s) and the antiaromatic ring fragment. (srce.hr)
  • Electrophoretic Mobilities and Cation Exchange Capacities of Florida Phosphate Slimes. (cdc.gov)
  • Part of this investigation was to determine the electrophoretic mobilities and cation exchange capacities of the slimes. (cdc.gov)
  • Avidity of the tetracyclines for the cations of metal. (webmd.com)
  • 150,916 files) was scanned, and only X-ray crystal structures containing metal cations and refined to at least 4 Å resolution were retained. (mdpi.com)
  • This resulted in 53,669 PDB entries containing 237,105 metal cations, the most common of which are shown in Table 1 . (mdpi.com)
  • Table S1 (Supplementary Materials) lists all isolated metal cations. (mdpi.com)
  • Metal cations bind to CDF protei. (bioportfolio.com)
  • In 1973, G. Olah was able to directly observe the 2-norbornyl cation by low-temperature NMR and confirm the presence of a non-classical 2-norbornyl cation, allowing the field to reach some conclusions about the possibilities of 3 center - 2 electron bonds involving carbon. (wikipedia.org)
  • The average particle energy needed to observe uni?cation of forces is estimated to be 10 19 GeV. (bartleby.com)
  • Organoclays with water soluble surfactants were prepared by the traditional cation exchange reaction. (scirp.org)
  • Identification and quantitative determination of the analyzed cations is performed by indirect detection measuring UV absorption at 254 or 267 nm wavelength. (environmental-expert.com)
  • In the first group of cations, we include Silver(I), Mercury(I)and Lead(II) cations. (wikibooks.org)
  • If a ppt is obtained, group I cations are confirmed. (wikibooks.org)
  • If not, we wll test the solution for the presence of group II cations. (wikibooks.org)
  • ProteinChip WCX2: is a weak cation exchange array with a carboxylate surface to bind cationic proteins. (bio-medicine.org)