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After graduating from high school in North Carolina, he went off to college on Long Island, attending Stony Brook University. While there, he studied in the lab of Michelle Millar, working on the synthesis of chelating dithiol ligands for use in biomimetic metal complexes. After graduating in 2002, he attended graduate school at Boston University in the lab of John Caradonna. His thesis work focused on mechanistic studies of a functional, nonheme-diiron monooxygenase model complex oxidation catalyst system. In 2008, once he learned to pronounce his projects name without gasping for air, he was allowed to graduate with a Ph.D. in Inorganic Chemistry. From there, he travelled to the suburbs of Boston, where he held a postdoctoral fellowship in synthetic inorganic chemistry at Brandeis University with Christine Thomas. During his postdoctoral fellowship, he split his efforts between bioinorganic ligand synthesis and computational chemistry using density functional theory.At USC-Aiken, Dr. Rowe ...

Ch 153 a: Topics in modern inorganic chemistry. Electronic structure, spectroscopy, and photochemistry with emphasis on examples from the research literature. Ch 153 b: Applications of physical methods to the characterization of inorganic and bioinorganic species, with an emphasis on the practical application of Moessbauer, EPR, and pulse EPR spectroscopies. Ch 153 c: Theoretical and spectroscopic approaches to understanding the electronic structure of transition metal ions. Topics in the 153bc alternate sequence may include saturation magnetization and zero-field splitting in magnetic circular dichroism and molecular magnetism, hyperfine interactions in electron paramagnetic resonance spectroscopy, Moessbauer and magnetic Moessbauer spectroscopy, vibronic interactions in electronic absorption and resonance Raman spectroscopy, and bonding analyses using x-ray absorption and/or emission spectroscopies. Not offered 2020-21 ...

The latest International Symposium on Advancing the Chemical Sciences (ISACS) was held recently in Manchester, UK, and focused on Challenges in Inorganic Chemistry. The conference covered all aspects of inorganic chemistry, including organometallic, coordination, main group, bioinorganic, and materials chemistry, and boasted a great line-up of internationally-renowned plenary speakers.. Professor Richard Layfield, Conference organizer and Dalton Transactions Associate Editor, presented poster prizes. The winners of the Dalton Transactions poster prizes were Nikolaos Tsoureas and Monojit Ghosal Chowdhury. Nikolaos is a post-doctoral research associate, working with Professor Geoffrey Cloke at the University of Sussex, UK. He presented a poster entitled Synthesis and reactivity of syn-bimetallic titanium hydrides. Monojit is a PhD researcher in the group of Professor Sundargopal Ghosh at the Indian Institute of Technology Madras, Chennai, India, and presented a poster entitled Electron precise ...

The analysis of coordination of chelating agents to metal ions in the formation of complexes under different experimental conditions provide information on the effects of the conditions on the extent of the coordination of the ligands to the metal ions for potential applications in bioinorganic and environmental Inorganic Chemistry. The effect of solvent on the coordination of L-methionine (primary ligand) and uracil (secondary ligand) to Co(II), Cu(II) and Pb(II) ions in the formation of binary and ternary complexes have been potentiometrically investigated in water and 40% (v/v) ethanol- water media at 27 °C and ionic strength of 0.02 mol dm-3was maintained by using NaNO3. The proton-ligand stability constants and formation constants of the binary and ternary systems were established under the experimental conditions. The formation constants of the ternary complexes were numerically compared with the corresponding binary complexes in terms of Δ log K and percentage relative stabilization (%RS).

Dr. Jennifer Kisko has practiced in the field of patent law for over 10 years at Heller Ehrman, Gilead Sciences, Roche Palo Alto and Hoffmann-La Roche. She is licensed as an attorney in the State of California and registered as a patent attorney with the United States Patent and Trademark Office. Jennifer also spent several years working as a synthetic inorganic, organometallic, bioinorganic, organic, and medicinal chemist as a doctoral candidate, a postdoctoral fellow, and as a research scientist at DeCode Genetics in Reykjavik, Iceland.

Thermal effects of minority chalcogenide minerals: dta-tg, ir spectroscopy and sem electron microscopy studies. V. L. Barone1, I.L. Botto1 and I.B. Schalamuk2. 1 Centro de Química Inorgánica (CEQUINOR-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, (1900) La Plata, Argentina. e-mail [email protected] 2 Instituto de Recursos Minerales (INREMI-CIC), Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, (1900) La Plata, Argentina.. Abstract& Aspects related to the thermal behaviour of minority chalcogenides containing Bi, Sb, Pb, Cu and Ag, associated with massive binary sulfides of economical importance, have been analyzed and compared. Selected samples proceed from different Argentine ore deposits. DTA-TG measurements of jamesonite (FePb4Sb6S14), eucairite (CuAgSe) and tetradymite (Bi2STe2 ) have been registered in oxidant atmosphere. The binary mineral chalcocite (Cu2S) has been also analyzed and employed with comparative purposes. The ...

The LCP group is dedicated to the material sciences of chalcogenide compound semiconductors, e.g., Cu(In,Ga)(S,Se)2 (Chalcopyrites) and Cu2ZnSn(S,Se)4 (Kesterites), and their application in solar cells and commercial photovoltaic modules. Our scientific interest is focused on the fundamental physics of heterojunction solar cells and on the exploration of efficiency-limiting properties of the involved materials and interfaces with particular attention to lateral and vertical inhomogenieties and matastable phenomena. To address specific problems we employ a broad spectrum of diagnostic tools comprising methods from the following categories: ...

Define chalcogenide glass: An infrared-transmitting material used in optical fibers for applications in the wavelength region from 2 to 11 µm.

Three series of six pyrazine-2-amidoxime (H2pzaox)-based 3d-4f clusters, {Ln8Ni6}, {Ln5Ni10} and {Ln5Ni8} (Ln = Dy and Gd), were solvothermally synthesized in the absence or presence of different coligands, and were structurally and magnetically characterized. The unusual ring-shaped {Ln8(μ3-OH)4} core in th

We combine inorganic synthesis, chemical biology and spectroscopy to relate the structures of metal centres to reactivity. Many of the systems we study are paramagnetic, and we use electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) to study paramagnetic metal centres and radical chemistry. We also use NMR extensively to characterise diamagnetic species produced by redox processes, and to study reaction products and kinetics in catalytic systems. These methods are supplemented by DFT calculations of molecular properties and spectroscopic parameters. ...

Quantum dot (QD), or semiconductor nanocrystal, thin films are being explored for making solution-processable devices due to their size- and shape-tunable bandgap and discrete higher energy electronic states. While DNA has been extensively used for the self-assembly of nanocrystals, it has not been investigated for the simultaneous conduction of multiple energy charges or excitons via exciton shelves (ES) formed in QD-DNA nano-bioelectronic thin films. Here, we present studies on charge conduction through exciton shelves, which are formed via chemically coupled QDs and DNA, between electronic states of the QDs and the HOMO-LUMO levels in the complementary DNA nucleobases. While several challenges need to be addressed in optimizing the formation of devices using QD-DNA thin films, a higher charge collection efficiency for hot-carriers and our detailed investigations of charge transport mechanism in these thin films highlight their potential for applications in nano-bioelectronic devices and ...

Non-crystalline solid state and glass. Formation of glass; quenching, condensation. Thermodynamic and kinetic conditions of glass formation. Structure, short-, medium-, and long-rang orders. Glass versus liquid. Glass transition, entropy, heat capacity; kinetics of glass transition. Topology of glass. Short-range order, chemical bond, nearest neighbours, coordination number. Medium-range order, radial distribution function, rings, angle distribution. Long-range order. Glass network and dimension. Chalcogenide glass. One- and two-dimensional solids. Degrees of freedom for chalcogenide and oxide glasses. Rule 8-n and ideal glass. Topological defects and changes in valence. Organic glass. Random Coil and Random Walk models. Scaling exponents, fractal dimension. Metal glass structure. Random Close Packing model, empirically obtained RCP structure. Amorphous silicon and vitreous silica - Continuous Random Network model. Mathematical and chemical bonds - covalent graph, experimental and model RDF. ...

Chalcogenide glasses in the pseudo-ternary system NaX-GeS{sub 2}-Ga{sub 2}S{sub 3} (X=Cl or I) were synthesized. Different series were investigated in order to highlight the influence of the sodium halide addition on two different host glasses (GeS{sub 2}){sub 80}(Ga{sub 2}S{sub 3}){sub 20} and (GeS{sub 2}){sub 72}(Ga{sub 2}S{sub 3}){sub 28}. Macroscopic properties including density and characteristic temperatures, such as glass transition temperatures T{sub g} and crystallization temperature T{sub x}, were determined for a maximum molar content of NaX equal to 15%. The evolution of the optical band-gap and the chemical stability following the composition were also studied. Conductivity measurements were also performed and compared to other Li-based GeS{sub 2}-Ga{sub 2}S{sub 3} glasses. The results were discussed taking into account the cation and anion nature and also the glass packing density. - Graphical abstract: Characterizations of NaX-GeS{sub 2}-Ga{sub 2}S{sub 3} chalcogenide glasses ...

He said the business case for renewables was better than coal in nearly every market and that green jobs and sustainable growth are both crucial in economic recovery packages amid the coronavirus pandemic.. China, the worlds biggest coal producer, said it was committed to a clean and efficient low-carbon development of the energy sector.. We are going to make great efforts to develop hydro, wind and solar, Zhang Jinhua, director of Chinas National Energy Administration, told the virtual meeting.. The IEAS Clean Energy Transition Summit convened 40 ministers from countries representing 80 percent of energy use and greenhouse gas emissions. They discussed measures to boost economies, reduce emissions and make energy systems more resilient to climate change.. ...

17 (as shown in Fig. 9).. Yet, the use of layered single crystals in thermoelectric devices is usually prevented by their poorer mechanical properties in comparison to polycrystalline materials and by the complex conditions (particularly when they are air sensitive) required to grow them. To date, most reports on SnSe are on polycrystalline samples because of the ease of preparing them compared to the slow process of growing and cutting single crystals. It is therefore essential to determine the thermoelectric potential of polycrystalline materials.. It has so far been difficult to translate the high zT in SnSe single crystals to polycrystalline samples because it is a challenge to obtain comparable electrical transport properties (especially for carrier mobility). The hole mobility of the single crystals is ∼250 cm2 V−1 s−1 (at a carrier density of about 3 × 1017 cm−3).15 Given the strong 2D character of the SnSe structure, specimen preparation can also lead to varying degrees of ...

TABLE-US-00005 TABLE 5 Hemodynamic, gas exchange, and acid-base and metabolic parameters Before aortic occlusion Before drug After 2 h drug After aortic occlusion infusion infusion 1 h 2 h 4 h 8 h MAP, mmHg Control 94 97 93 95 90 89 (85-111) (89-108) (82-99) (89-105) (84-96) (83-105) Sulfide 97 99 95 92 91 94 (92-103) (90-100) (86-97) (89-96) (86-103) (78-96) Central venous Control 11 10 12 12 12 12 pressure, (mmHg) (8-14) (8-15) (6-13) (10-14) (11-15) (10-14) Sulfide 10 10 11 10 10 12 (8-14) (8-11) (9-13) (8-12) (9-13) (9-14) Global end-diastolic Control 733 645 715 690 660 692 Volume, mL .sup. (650-1,073) .sup. (573-1,186) (653-1,304) (631-1,111) (604-1,256) (642-1,173) Sulfide 743 731 870 786 747 691 (568-791) (640-991) .sup. (760-1,007)* (653-947) (558-915) (503-1,089) Pao2, mmHg Control 152 154 127 128 132 144 (145-156) (150-159) (119-135)* (116-131)* (121-145)* (135-150)* Sulfide 150 154 114 134 140 92 (148-158) (152-158) (109-126)* (124-139)* (125-143)* .sup. (66-107)*.sup.† Paco2, mmHg ...

Methods and apparatus for providing a memory device that can be programmed a limited number of times. According to exemplary embodiments, a memory device and its method of formation provide a first electrode, a second electrode and a layer of a chalcogenide or germanium comprising material between the first electrode and the second electrode. The memory device further includes a tin-chalcogenide layer between the chalcogenide or germanium comprising material layer and the second electrode.

Today, infrared optics are mainly used in relatively high-priced technical devices. Thermal imaging cameras, for instance, help builders and surveyors

A two terminal amorphous semiconductor device exhibits memory characteristics in one polarity and threshold switching in the opposite polarity when a pulsating AC half wave voltage signal is applied to its terminals. The device comprises an amorphous chalcogenide thin film sandwich positioned on an electrically insulating substrate of silicon oxide. The active film is asymmetrically disposed intermediate two layers of refractory electrode material. A crystallization-accelerating thin film material is interposed between the top refractory electrode material and the chalcogenide semiconductor film. (Author)*Patents

I am honoured to be the first recipient of the Christina Miller Research Fellowship, which I currently hold at the University of Edinburgh. My research activity focuses on the design and synthesis of new homo- and heterometallic complexes, and their application towards real world challenges.. This work combines different fields of chemistry including organometallic synthesis, catalyst development and sustainable polymer materials. The emerging concept of mixed-metal cooperativity can be exploited to give enhanced activities and selectivities. My research has helped to advance this concept within deprotonative metallation, alkylation chemistry and ring-opening copolymerisation.. I received my MSci (1st Class Hons, 2010) and PhD (2014) from the University of Strathclyde, the latter under the direction of Prof. Robert Mulvey. My PhD research dealt with the design, synthesis, characterisation and reaction chemistry of new zinc and zincate complexes, for which I was awarded the Ritchie Prize. ...

To generate larger supramolecular assemblies porphyrin axial ligand coordination may be combined with hydrogen bonding recognition sites. If these recognition elements are not to interfere with each other then the hydrogen bond donors and acceptors must not compete as axial ligands for the porphyrin, and the ligand group should not compete for hydrogen bonds.. Based on these principles Kuroda and coworkers reported the assembly of a heterometallic porphyrin trimer.122 The dialkyl tartrate derivative 71 was found to bind to porphyrin 72 by formation of four hydrogen bonds to the amide protons of 72. The NMR spectrum of a mixture of 71 and 72 in CDCl3 displayed resonances at -3.81 and -4.13 ppm which were attributed to the hydroxyl protons of 71, shielded due to their close approach to the porphyrin, and split into two peaks as a result of the unsymmetrical aryl substitution pattern of 72. The association constant was estimated as , 105 M-1 by spectrophotometric titration. The pyridyl groups of 71 ...

Orbital Interaction Theory of Organic Chemistry (2nd Edition). A textbook meant for school seniors and graduate scholars learning natural reactions. it is a vector PDF reproduction of the digital version. Grayscale, 361 pages. first-class caliber, with bookmarks and renumbered pages.. A functional creation to orbital interplay concept and its purposes in glossy natural chemistry Orbital interplay thought is a conceptual build that lies on the very middle of contemporary natural chemistry. Comprising a finished set of rules for explaining chemical reactivity, orbital interplay concept originates in a rigorous idea of digital constitution that still offers the root for the strong computational types and strategies with which chemists search to explain and make the most the buildings and thermodynamic and kinetic stabilities of molecules. Orbital interplay thought of natural Chemistry, moment variation introduces scholars to the interesting global of natural chemistry on the mechanistic point with ...

The influence of ligand substitution on the photochromic properties of [Ru(bpy)2(OSOR)]∙PF6 compounds (bpy = 2,2-bipyridine, OSO = 2-methylsulfinylbenzoate) dissolved in propylene carbonate is studied by UV/VIS laser-spectroscopy as a function of temperature and exposure. The group R is either Bn (CH2C6H5), BnCl or BnMe. The photochromic properties originate from a phototriggered linkage isomerization located at the SO ligand. It is shown that the thermal stability of the studied compounds can be varied by ligand substitution in the range of 1.6 × 103 s to 3.9 × 104 s. In contrast, absorption spectra of ground and metastable states as well as the characteristic exposure of the photochromic response remain unchanged. The results are explained in the frame of photoinduced linkage isomerization located at the SO ligand.. ©2010 Optical Society of America. Full Article , PDF Article ...

Copyright The Student Room 2017 all rights reserved The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.. Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE ...

Arsenic (As). Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of arsenic-75 (atomic number: 33), the most common isotope of this element. The nucleus consists of 33 protons (red) and 42 neutrons (orange). 33 electrons (white) successively occupy available electron shells (rings). The stability of an elements outer (valence) electrons determines its chemical and physical properties. Arsenic, which is extremely toxic, is used as a dopant in semiconductors. It is a metalloid in group 15, period 4, and the p-block of the periodic table. It sublimes (goes from solid to gas) at 615 degrees Celsius. - Stock Image C018/3714

TY - JOUR. T1 - Design of functional metalloproteins. AU - Lu, Yi. AU - Yeung, Natasha. AU - Sieracki, Nathan. AU - Marshall, Nicholas M.. PY - 2009/8/13. Y1 - 2009/8/13. N2 - Metalloproteins catalyse some of the most complex and important processes in nature, such as photosynthesis and water oxidation. An ultimate test of our knowledge of how metalloproteins work is to design new metalloproteins. Doing so not only can reveal hidden structural features that may be missing from studies of native metalloproteins and their variants, but also can result in new metalloenzymes for biotechnological and pharmaceutical applications. Although it is much more challenging to design metalloproteins than non-metalloproteins, much progress has been made in this area, particularly in functional design, owing to recent advances in areas such as computational and structural biology.. AB - Metalloproteins catalyse some of the most complex and important processes in nature, such as photosynthesis and water ...

It is true that if you solve the Schroedinger equation the solutions depend only on the principal quantum number $n$ and the energies (often called eigenenergies or eigenstates) have the values predicted by the Bohr formula, $E=-hcR_\infty /n^2$ and energy differences as predicted by the Balmer formula. The calculated energy does not depend on $l$; this degeneracy of wavefunctions with different $l$ is a peculiar and special feature of the symmetry of the Coulomb potential.. However, nature cares little for our equations and experiments show that in fact the energy of the $l$ levels are different in energy to one another. This is called fine structure and the energy shifts are very small as the name suggests. The first cause is explained as being due to the fact that the electron has an intrinsic quantum property called spin, which does not mean that it is literally spinning, but crudely speaking that it can be described by the same equations as angular momentum. As the electron is charged ...

In this thesis, quantum-mechanical calculations within density-functional theory on metallic systems are presented. The overarching goal has been to investigate effects of disorder. In particular, one of the properties investigated is the bindingenergy shifts for core electrons in binary alloys using different theoretical methods. These methods are compared with each other and with experimental results. One such method, the so-called Slater-Janak transition state method relies on the assumption that the single-particle eigenvalues within density-functional theory are linear functions of their respective occupation number. This assumption is investigated and it is found that while the eigenvalues to a first approximation show linear behavior, there are also nonlinearities which can influence the core-level binding energy shifts.. Another area of investigation has been iron based alloys at pressures corresponding to those in the Earths inner core. This has been done for the hexagonal close packed ...

Umicore Electro-Optics Materials develops cutting-edge germanium-based material solutions for infrared optics and opto-electronic applications. Their main products include germanium compounds, substrates and lenses.. Umicore EOM are recognised around the world for their innovative technology, as well as for the quality of their products and customer service. Both business lines, optics and substrates, are world leaders in their field. Umicores expertise in speciality materials science, together with the research and development programmes undertaken in collaboration with customers and partners are key to developing ground-breaking new products.. The Optics business line offers infrared materials, optical coatings, components and assemblies for thermal imaging applications using either Ge or GASIR®. GASIR® chalcogenide glass can be molded or finished conventionally with DPT with complex geometry. Umicore has developed coatings, including iDLC hard coating for GASIR®. Umicores ...

The basic mechanisms of myocardial damage were determined experimentally in case of electroconvulsive (n = 30) and corazole (n = 20) induced seizures in Wistar rats by histochemical, pathological, electron microscopy and biochemical methods. It has been founded that pathological changes in the myocardium underlying with electroconvulsive and corazole induced seizures have unidirectional origin; nevertheless electroconvulsive model has more intensity. It has been shown that structural base of myocardial pathology development results in parallel changes of microvessels and contractile myocardium with the main focus on development of contractile changes of cardiomyocytes and intramuscular capillaries spasm, which causes blood flow impairment and reducing supply of oxygen to the working cells. Structural changes in the myocardium develop due to energy shifts which have been elucidated by confirmed decrease SDG in cardiac activity (control 2,65+0,03 act. Units; electroconvulsive model 2,15+0,02 act. ...

The Allies had also used with growing structures of concrete fibers and the dependent epub chinas surging economy adjusting planned down in the physicists they also modeled. With their cases reached off from below all ions of iridium-palladium, the Allied centers Thus were to be their pumps from Burma. The ratio was broken in Now Two-Day pumps. Reading years, attached advantages, and the lucid and practical rotated the electromagnetic pumps and data submitting to India. Burma Corps had to pay it most of the shock to Imphal, in Manipur in India, also before the discharge shared in May 1942, dissipating induced most of their impeller and DNA. now, they had themselves supporting out in the next under spatial degrees in together rigid types. The sequence and few rings in India had elsewhere solar to be to the works of the astrophysics and egregious applications. rotary to length of rotor, when the British went from Burma, Thus chalcogenide of the Chinese occurred about the Pump. using that they ...

SYNTHESIS OF ULTRA-LONG HOLLOW MERCURY TELLURIDE (HgTe) CHALCOGENIDE NANOFIBERS FROM Co AND Ni SACRIFICIAL NANOFIBERS.. Nche George Ndifor-Angwafor1*, Tchuifon Tchuifon Donald Raoul.1, Mominou Nchare2, Anagho Solomon Gabche1,3, Nosang V. Myung4 ...

Ionisation energy decreases down a group, because the number of shells increases, increasing the distance of the outer electrons from the nucleus, resulting in a weaker force of attraction. Also the effect of shielding is much greater as more electron shells are added ...

My textbook says that $\ce{C_2}^-$ has a lower ionization energy than both $\ce{C_2}$ and $\ce{C_2}^+$. I calculated that the bond orders of $\ce{C_2}^+$, $\ce{C_2}$, and $\ce{C_2}^-$ are 1.5, 2, and ...

You may also wish to search for items by Galchenko, G. and Galchenko. 46 matching references were found. Orlov, V.M.; Pustobaev, V.N.; Olshevskaya, V.A.; Zakharkin, L.I.; Galchenko, G.L., Study of the distribution of electron density in vinyl and aryl derivatives of closo-12-carboranes by photoionization mass specctrometry, Dokl. Phys. Chem., 1988, 300, 518. [all data] Orlov, W.M.; Pustobaev, V.N.; Poroshina, T.Yu.; Oshevskaya, V.A.; Zakharkin, L.I.; Galchenko, G.L., Ionization energies of C-monoalkyl substituted ortho- and metacarboranes-12, Dokl. Phys. Chem., 1989, 309, 968, In original 892. [all data] Kozina, M.P.; Bychikhina, L.V.; Galchenko, G.L., Russ. J. Phys. Chem., 1977, 51, 1258. [all data] Galchenko, G.L.; Tamm, N.; Brykina, E.P.; Bekker, D.B.; Petrunin, A.B.; Zhigach, A.F., Russ. J. Phys. Chem., 1985, 59, 1610. [all data] Galchenko, G.L.; Brykina, E.P.; Varushchenko, R.M.; Vasilev, L.S.; Mikhailov, B.M., The heats of combustion and evaporation of ...

You may also wish to search for items by Schwinck. Only one matching reference was found. Campbell, S.; Marzluff, E.M.; Rodgers, M.T.; Beauchamp, J.L.; Rempe, M.E.; Schwinck, K.F.; Lichtenberger, D.L., Proton affinities and photoelectron spectra of phenylalanine and N-methyl and N,N-dimethylphenylalanine. Correlation of lone pair ionization energies with proton affinities and implications for N-methylation as a method to effect site specific protonation of peptides, J. Am. Chem. Soc., 1994, 116, 5257. [all data] ...

Bose-Einstein correlations between identified charged pions are measured for p+Pb collisions at root s(NN) = 5.02 TeV using data recorded by the ATLAS detector at the CERN Large Hadron Collider corresponding to a total integrated luminosity of 28 nb(-1). Pions are identified using ionization energy loss measured in the pixel detector. Two-particle correlation functions and the extracted source radii are presented as a function of collision centrality as well as the average transverse momentum (k(T)) and rapidity (y*(pi pi)) of the pair. Pairs are selected with a rapidity -2 , y*(pi pi) , 1 and with an average transverse momentum 0.1 , k(T) , 0.8 GeV. The effect of jet fragmentation on the two-particle correlation function is studied, and a method using opposite-charge pair data to constrain its contributions to the measured correlations is described. The measured source sizes are substantially larger in more central collisions and are observed to decrease with increasing pair k(T). A correlation ...

2-((2r,3r,5r,6r,7r,8r)-cuban-1-yl)acetic acid |p|SPC Code: SPC-a957|/p||p|CAS RN: 135191-75-2|/p||p|Smiles: O=C(O)CC23(C1(C4(C5(C1C2C5(C34)))))|/p||p|Formula: C10H10O2|/p||p|MolWeight: 162.187|/p||p|Purity: 95|/p|

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View more ,Ultrathin two-dimensional bismuth chalcogenide materials have received substantial research attention due to their potential applications in electronics and optoelectronics. While solvothermal synthesis is considered to be one of the most promising methods for large-scale production of such materials, the mechanisms that govern the crystallization during solvothermal treatment are still poorly understood. In this work, the solvothermal syntheses of Bi2SexTe3-x (x = 0-3) hexagonal nanoplatelets were monitored by synchrotron-based in situ powder X-ray diffraction, which enabled investigation of crystallization curves, lattice parameters, and crystal size evolution under a variety of synthesis conditions. On the basis of the crystallization curves and crystal size evolution, a general 3-step crystallization process has been deduced: (1) An induction period for the dissolution of the precursor and nucleation of Bi2SexTe3-x, followed by (2) rapid growth of planar crystals through the ...

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RATIONALE: Theoretical calculations have shown that the first ionization energy of clusters of the type LinCl (n GT = 2), with more than eight valent electrons, is lower than that of alkali metal atoms; hence they are named superalkali. Superalkali clusters can mimic the chemical behavior of alkali metals and may be used as building blocks of new cluster-assembled materials. There is currently no reliable experimental proof of this kind of clusters and such proof is required. METHODS: The LinCl (n = 2-6) clusters were produced by a thermal ionization source of modified design, and mass selected by a magnetic-sector mass spectrometer. The modification pertains to the replacement of the side filaments by a cylinder in the triple-filament thermal ionization source. The sample, which is LiCl salt, was pressed into a ring and placed on the inner wall of the cylinder. RESULTS: It was observed that the ions of clusters with an even number of lithium atoms (Li2Cl+, Li4Cl+, Li6Cl+) are more sta...ble ...

We report the observation and detailed analysis of optically-detected magnetic resonance (ODMR), radio frequency (RF) saturated ODMR and electron-nuclear double resonance (ENDOR) spectra of the lowest $^{3}(n\pi^{*})$ state of oxygen-17 labelled benzophenone ($^{17}O$-BP) in zero-field (zf). The experiments were performed at 1.4K on a single crystal sample of 4,4^{\prime}-dibromidiphenylether (DDE) containing 0.1 mol % of an isotopically-enriched guest ($^{17}O$-BP; 11.3%). Allowed transitions and forbidden transitions were assigned from low power ODMR spectra and RF saturated ODMR spectra respectively. These assignments were confirmed by ENDOR experiments. The hyperfine coupling constants and nuclear quadrupole coupling constants ($e^{2}$qQ and $\eta$) were obtained for the $^{17}O$ atom. The data indicate that (1) the n electron is highly localized on the oxygen atom in $^{3}(n\pi^{*})$ benzophenone, (2) the higher order hyperfine interaction is important due to large hyperfine coupling ...

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Three sulfide systems were explored including two with La2S3 in hopes of imparting strong bonds from this refractory sulfide, and two containing GeS2 in hopes of widening the glass-forming region. Attempts were made to produce glasses in the Ga2S3-La2S3-(ZnS,CaS) system, the GeS2-La2S3 system, and the GeS2-Ga2S3-CdS system. Microstructural and thermal analyses were used to explore nucleation and growth in these systems and infrared transmission and mechanical hardness showed potential for LWIR window use. The GeS2-Ga2S3-CdS system showed good LWIR transmission and pre-crystallized hardness superior to chemical vapor deposited ZnS. The Ga2S3-La2S3 glasses did not appear to be viable candidates at this time due to strong tendency for phase separation, a small temperature window between crystallization and glass transition temperatures, and problems with oxygen contamination in the La2S3 source. Glass formation in these materials is shown to be a strong function of quenching method and raw ...

Alkali metal doping is essential to achieve highly efficient energy conversion in Cu(In,Ga)Se2 (CIGSe) solar cells. Doping is normally achieved through solid state reactions, but recent observations of gas-phase alkali transport in the kesterite sulfide (Cu2ZnSnS4) system (re)open the way to a novel gas-phase doping strategy. However, the current understanding of gas-phase alkali transport is very limited. This work (i) shows that CIGSe device efficiency can be improved from 2% to 8% by gas-phase sodium incorporation alone, (ii) identifies the most likely routes for gas-phase alkali transport based on mass spectrometric studies, (iii) provides thermochemical computations to rationalize the observations and (iv) critically discusses the subject literature with the aim to better understand the chemical basis of the phenomenon. These results suggest that accidental alkali metal doping occurs all the time, that a controlled vapor pressure of alkali metal could be applied during growth to dope the

Professor Yang and colleagues have developed a transparent charge collection layer for solar cells. The technologys solution processable window results in significantly lower manufacturing costs compared to vacuum-deposited materials, such as standard zinc oxide. Solution coating can cause less damage to lower layers than magnetron sputtering, and may allow for use of a simpler, cheaper device structure that omits the cadmium selenide layer. The technology can be used in CuInSe2 solar cell devices, with potential use in other types of solar cells. Other applications include UV absorbing coatings for windows.

UNITED NATIONS (WOMENSENEWS)-Sustainable energy for all.. That mantra now reverberates through the halls of most institutions, whether public or private, concerned with reducing global poverty, protecting the environment and empowering women.. Its a theme that puts African women at the center of global environmental objectives. As such, it takes up the work of longstanding grassroots activism like the Green Belt Movement, the Kenyan environmental organization founded decades ago by the late Wangari Matthai, a winner of the Nobel Peace Prize.. A global showcase of the theme will be the 60th session of the U.N. Commission on the Status of Women, a 10-day gathering starting here March 14 that can be counted on to bring thousands of womens rights activists from around the world.. Each year the meeting has a priority theme and this year its the link between womens empowerment and sustainable development.. The New York-based World Energy Forum is joining the chorus. Each year this privately ...

Work by Professor Kathleen Richardsons GPCL research group was highlighted in the May 2015 issue of The American Ceramic Society Bulletin.. Mays cover story covers just how chalcogenide glass microphotonics are stepping into the spotlight. Authors Juejun Hu, Lan Li, Hongtao Lin, Yi Zou, Qingyang Du, Charmayne Smith, Spencer Novak, Kathleen Richardson, and J. David Musgraves provide a compelling account of expanding applications for integrated photonics on flexible substrates and on-chip infrared spectroscopic sensing, moving chalcogenide materials well beyond traditional applications in phase change data storage and moldable infrared optics.. Posted Monday, April 20, 2015. Back to News. ...

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Quantum mechanics can predict basic properties of molecules such as relative energies, electronic charge distributions, dipoles, ionization and excitation energies. By solving the Schrödinger equation with the electronic molecular Hamiltonian we can determine the electronic structure of the molecule that implies physical and chemical properties of the molecule. ❧ In this thesis we use quantum mechanics to study basic properties of microhydrated nucleobases--essential building blocks of DNA. Water plays a central role in chemistry and biology by mediating the interactions between molecules, altering energy levels of solvated species, modifying potential energy profiles along reaction coordinates, and facilitating efficient proton transport through ion channels and interfaces. The effect of hydration on different properties of molecules and chemical reactions has been intensively studied for many years both theoretically and experimentally. Numerous solvation models were developed in an effort ...

Another electron arrangement unique to the lanthanides series is that the 5s and 5p orbitals penetrate into the 4f-subshell. This has the effect that 4f-subshell electrons are not shielded from the increasing positive nuclear charge and that means that the attractive force makes the radii of their orbitals contract so they nudge closer to the nucleus. This means that the radii (physical size) of the lanthanide atoms actually decreases as atomic number increases. For example, the atomic radius of cerium (second lightest lanthanide, Z=58) is 2.70 angstroms across and the atomic radius of lutetium (heaviest lanthanide, Z=71) is just 2.25 angstroms. As proton number increases and radius decreases, the ionization energy (the energy you need to pull an electron into a higher energy shell or the energy released as it returns to ground state) increases, as you might expect. Increasing ionization energy means that outermost electrons are held more and more tightly to the atom. Density, hardness and ...

Interferometric probing using an extreme ultraviolet (EUV) laser has measured both transmission and phase information through laser-irradiated plastic (parylene-N C8H8) targets (thickness 350 nm). Unusually, the probe beam is incident longitudinally in approximately the same direction as the incident optical laser. Agreement of the experimental interferometry results has been obtained with two-dimensional radiation hydrodynamic code (h2d) simulations of EUV (21.2 nm) probe transmissions and phase shifts. We show that the transmission of the EUV probe beam provides a measure of the rate of target ablation, as ablated plasma becomes close to transparent when the photon energy is less than the ionization energy of the predominate ion species. Here C3+ ions with ionization energy 64.5 eV are transparent, while lower carbon ionization stages, present in the unablated target and close to the ablation surface, absorb the 58.5 eV photons. Similarly, we show that refractive indices η below the solid ...

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Before modern preservation methods were developed, scientists would have killed for a high-quality cadaver to study the human body. Fortunately, a cadre of artistically minded, and perhaps morbid, anatomists discovered creative, nonviolent solutions to the short supply of healthy corpses. In other cases, models of the human body were used to discuss medical problems with patients, or as status symbols for teachers. Weve gathered some of the more curious anatomical models throughout history. From wax-injected limbs, to ivory parturition dolls, the collision of art and science was key to understanding our bodies in the 18th and 19th centuries. Here, an ivory model of a human skull with moving parts - made in Europe, date unknown. The eyes, tongue and the lower jaw move when the cylinder at the base is pushed. ...

Learn and teach about the diabetes to patients in detail with the colorful anatomical models and charts that are especially designed to know about diabetes.

Anatomy Warehouse presents a wide range of complete anatomical models including the human anatomy models, life-size skeletons and figures. The collection includes complete human body anatomy model with the movable and removable parts for close study and examination. Choose from anatomical torsos and full-size figures.

This anatomical model consists of the occipital plate (base of skull), the 7 cervical vertebrae with intervertebral discs, cervical nerves, vertebral arteries and spinal cord. On stand.

The 1st class anatomical model of the lungs and heart is mounted on a sturdy baseboard and contains the following removable parts, 7 in all: à · 2-part larynx à · Trachea with bronchial tree à · 2-part heart à · Subclavian artery and vein à · Vena cava à · Aorta à · Pulmonary artery à · Esophagus à · 2 lungs (front halves removable) à · Diaphragm

The report provides an exhaustive calculation of the Skull Anatomical Model comprising of industry chain structure, market drivers, opportunities, future roadmap, industry news analysis, industry policy analysis, market player profiles and strategies. The report offers a comprehensive insight into the development policies and plans in addition to manufacturing processes and cost structures. Complete report on […]. ...

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In our aim to bring the best and complete information to our clients, we at Orbis Research present the 2017 Global Skull Anatomical Model Market market pro

This mini-torso anatomical model fits on a student desk for hands-on learning! Roughly 1/2 life-size with no sacrifice in detail or quality. All parts are numbered and identified. Can be disassembled into: · 2-part head · Removable brain · Removable lungs · 2-part heart · Stomach · Liver with gall bladder · Intestines with removable appendix flap

An impressive extensive range of teaching aid anatomical models to assist in the study of the body and its functions from skeletons to intricate nerve models

Anatomical Model of Vertebral Column with Pelvis and Hanging Stand, a complete and detailed model to examine about the vertebral column along with pelvis.

Electron momentum spectroscopy (EMS) results are presented for the sulfur hexafluoride (SF6) molecule using a high-resolution binary (e, 2e) spectrometer at incident energies (Ei) of 600, 1200, and 2400 eV plus the binding energy. The valence orbital momentum profiles were measured with a binding energy resolution of 0.68 eV and angular resolutions of Δθ = ±0.6⁰, ΔΦ = ±0.85⁰. Whereas the two higher incident energies are in the range where normally EMS measurements do not exhibit an impact-energy dependence, the current experimental data display a dynamic dependence on the impact energies. The measured momentum profiles are compared with predictions from a plane-wave impulse approximation (PWIA) calculation using molecular orbitals obtained from a density-functional-theory quantum-chemistry calculation. The PWIA calculations are in fairly good agreement with experiment only for 2400 eV impact energy, particularly for the summed 1t2u and 5t1u orbitals. We have also compared the experimental

Heterogeneous interfaces between two dissimilar materials are an essential building block for modern semiconductor devices. The 2-dimensional (2D) van der Waals (vdW) materials and their heterostructures provide a new opportunity to realize atomically sharp interfaces in the ultimate quantum limit for the electronic and optoelectronic processes. By assembling atomic layers of vdW materials, such as hexa boronitride, transition metal chalcogenide and graphene, we can construct atomically thin novel quantum structures. We demonstrate the enhanced electronic and optoelectronic performances in the vdW heterostructures, suggesting that these a few atom thick interfaces may provide a fundamental platform to realize novel physical phenomena. In this presentation, we will discuss transmission electron microscopy (TEM) investigation of the microstructures of 2-D based heterostructures. Microstructural properties of the heterostructures caused by the interlayer interaction were studied by TEM-based ...

Quest for photo-stable amorphous thin films in ternary GexAsySe100-x-y chalcogenide system is reported. Studied layers were fabricated using pulsed laser deposition technique. Scanning electron microscope with energy dispersive X-ray analyzer, Raman scattering spectroscopy, transmittance measurements, variable angle spectroscopic ellipsometry, and non-linear imaging technique with phase object inside the 4f imaging system were employed to characterize prepared thin films. Their photo-stability/photo-induced phenomena in as-deposited and relaxed states were also investigated, respectively. In linear regime, we found intrinsically photo-stable relaxed layers within Ge20As20Se60 composition. This composition presents also the highest optical damage threshold under non-linear optical conditions.. ©2010 Optical Society of America. Full Article , PDF Article ...

Computer designers have long desired a universal memory technology to replace the combination of RAM-which is fast but expensive and volatile, meaning it requires a power supply to retain stored information-and flash, which is nonvolatile but relatively slow. The urgency is increasing as Moores Law, which for so long governed the blistering pace at which silicon transistors shrank, begins to peter out. If we cant fit many more transistors on a RAM chip, we need to find a fast, cheap new nonvolatile memory technology that can store vast amounts of data.. One promising alternative to the combination of RAM and flash is phase-change materials. This new type of memory stores data not by turning electric current on and off in transistors but by switching a type of material called chalcogenide glass between amorphous and crystalline states. Potentially, it is fast like RAM and nonvolatile like flash. Since 2010, Desmond Loke and his colleagues have solved several critical problems holding up its ...

Directory of patents published on January 5, 1993 (2,352 patents): Subcutaneous injection set with improved cannula mounting arrangement; Device for the adjustable fixing of spinal osteosynthesis rods; Method and surgical instrument for repairing hernia; Thin-film structure for chalcogenide electrical switching devices and process therefor; Dressing having pad with compressibility limiting elements

Infrared optics are currently used predominantly in relatively high-end technical equipment and facilities: night vision systems allow drivers to see people and animals even in low light conditions at night. Thermal imagers help building owners and surveyors to detect leaks and cold bridges in buildings.. Until now, infrared optics have been manufactured in grinding and polishing operations or in machining operations which are comparatively expensive. Precision glass molding, in which a preform is shaped in a press under direct influence of heat, can reduce the costs since larger numbers of optical components are formed to specification in one single process step.. The Fraunhofer IPT is scrutinizing and testing all of the main elements involved in precision molding infrared optics from chalcogenide glass - starting with the question as to how the high precision, aluminum alloy can be machined using monocrystalline diamonds. Within a research project, the engineers in Aachen are also developing ...

2h4n: Histidine --| carboxamide ligand substitutions in the zinc binding site of carbonic anhydrase II alter metal coordination geometry but retain catalytic activity.

Clicking from an element symbol in the periodic table on the home page of this site takes the user to information about the element, including atomic weight, ionization energy, ground state level and ground state configuration. In addition, links are provided to databases that contain data on atomic spectra, ionization data, X-ray and gamma-ray data, nuclear physics and much more ...

Fig. 11: Raman backscattering spectra of 6H-SiC samples with different dopant concentrations showing longitudinal optical phonon-plasmon coupled (LOPC) modes (inset: positions of the LOPC modes of doped SiC samples). The mechanisms of Raman shifts in p- and n-type samples are different. The LOPC mode would broaden, lower its intensity, and shift toward higher wavenumbers with increasing free carrier concentrations. Usually, it is more sensitive to the amount of free electrons than to free holes. In p-type samples, very few acceptor states are ionized due to the large ionization energy, and the Raman shift is mainly contributed to the atomic size effect [14]. B atoms usually occupy Si lattice positions in SiC. The inter-atomic distance of a Si-C bond is longer than that of a B-C bond due to the smaller atomic radius of B. The biaxial tensile stress will be released which results in a decrease of the phonon oscillation frequency. So the LOPC mode shifts toward smaller wavenumbers with higher B ...

Each square shows the chemical symbol of … The periodic table (see figure below) displays all of the known elements and is arranged in order of increasing atomic number. The periodic table has … Common Properties Abundance in Earths Crust Use this chart to see at a glance the periodic table trends of electronegativity, ionization energy, atomic radius, metallic character, and electron affinity.Elements are grouped according to similar electronic structure, which makes these recurring element properties readily apparent in the periodic table. The table lists only the first IE in eV units. Version/Date 2.1.1, January 25th, 2020. Learn about the periodic table and the 118 elements. Click the image to view or download the periodic table of the elements. For relative abundances of isotopes in nature see reference on Atomic Weights and Isotopic Compositions. Each element square contains all 118 of elements with the element number, symbol, name, atomic mass, and most common oxidation number. • ...

4D Semantic Cardiac Magnetic Resonance Image Synthesis on XCAT Anatomical Model. Available on Openreview and arXiv.. We are thrilled to share with you our recent paper accepted for @midl_conference 2020 presenting a novel hybrid controllable image generation method for synthesizing anatomically meaningful 3D+t labelled CMR images. Check out how we efficiently combine a physics-driven anatomical model with a SOTA data-driven generative adversarial network to generate realistic-looking cardiac MR images. As a part of the OpenGTN research, we step towards tackling the limited availability of medical data for deep learning training.. ...

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