Chalcogens: The elements OXYGEN; POLONIUM; SELENIUM; SULFUR; and TELLURIUM; that form group 16 (formerly group VI) of the periodic table.Dictionaries, ChemicalBiopharmaceutics: The study of the physical and chemical properties of a drug and its dosage form as related to the onset, duration, and intensity of its action.Drug Approval: Process that is gone through in order for a drug to receive approval by a government regulatory agency. This includes any required pre-clinical or clinical testing, review, submission, and evaluation of the applications and test results, and post-marketing surveillance of the drug.Pharmaceutical Preparations: Drugs intended for human or veterinary use, presented in their finished dosage form. Included here are materials used in the preparation and/or formulation of the finished dosage form.Agrochemicals: Chemicals used in agriculture. These include pesticides, fumigants, fertilizers, plant hormones, steroids, antibiotics, mycotoxins, etc.Dictionaries, MedicalTellurium: Tellurium. An element that is a member of the chalcogen family. It has the atomic symbol Te, atomic number 52, and atomic weight 127.60. It has been used as a coloring agent and in the manufacture of electrical equipment. Exposure may cause nausea, vomiting, and CNS depression.ThiophenesAcronine: A pyrano-acridone alkaloid found in RUTACEAE plants.Rutaceae: A plant family in the order Sapindales that grows in warmer regions and has conspicuous flowers.Chromans: Benzopyrans saturated in the 2 and 3 positions.Vitamin E: A generic descriptor for all TOCOPHEROLS and TOCOTRIENOLS that exhibit ALPHA-TOCOPHEROL activity. By virtue of the phenolic hydrogen on the 2H-1-benzopyran-6-ol nucleus, these compounds exhibit varying degree of antioxidant activity, depending on the site and number of methyl groups and the type of ISOPRENOIDS.Tocopherols: A collective name for a group of closely related lipids that contain substitutions on the 2H-1-benzopyran-6-ol nucleus and a long hydrocarbon chain of isoprenoid units. They are antioxidants by virtue of the phenolic hydrogen. Tocopherols react with the most reactive form of oxygen and protect unsaturated fatty acids from oxidation.Antimitotic Agents: Agents that arrest cells in MITOSIS, most notably TUBULIN MODULATORS.Carbon: A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.Molecular Structure: The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.Carbon Compounds, Inorganic: Inorganic compounds that contain carbon as an integral part of the molecule but are not derived from hydrocarbons.Palladium: 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.Nitrogen Compounds: Inorganic compounds that contain nitrogen as an integral part of the molecule.Cyclization: Changing an open-chain hydrocarbon to a closed ring. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)Heterocyclic Compounds: Ring compounds having atoms other than carbon in their nuclei. (Grant & Hackh's Chemical Dictionary, 5th ed)Phase Transition: A change of a substance from one form or state to another.Polymorphism, Genetic: The regular and simultaneous occurrence in a single interbreeding population of two or more discontinuous genotypes. The concept includes differences in genotypes ranging in size from a single nucleotide site (POLYMORPHISM, SINGLE NUCLEOTIDE) to large nucleotide sequences visible at a chromosomal level.Polymorphism, Single Nucleotide: A single nucleotide variation in a genetic sequence that occurs at appreciable frequency in the population.Calorimetry, Differential Scanning: Differential thermal analysis in which the sample compartment of the apparatus is a differential calorimeter, allowing an exact measure of the heat of transition independent of the specific heat, thermal conductivity, and other variables of the sample.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Inventions: A novel composition, device, or process, independently conceived de novo or derived from a pre-existing model.Zalcitabine: A dideoxynucleoside compound in which the 3'-hydroxy group on the sugar moiety has been replaced by a hydrogen. This modification prevents the formation of phosphodiester linkages which are needed for the completion of nucleic acid chains. The compound is a potent inhibitor of HIV replication at low concentrations, acting as a chain-terminator of viral DNA by binding to reverse transcriptase. Its principal toxic side effect is axonal degeneration resulting in peripheral neuropathy.Cytidine: A pyrimidine nucleoside that is composed of the base CYTOSINE linked to the five-carbon sugar D-RIBOSE.Heterocyclic Compounds, Bridged-Ring: A class of organic compounds which contain two rings that share a pair of bridgehead carbon atoms.Anti-HIV Agents: Agents used to treat AIDS and/or stop the spread of the HIV infection. These do not include drugs used to treat symptoms or opportunistic infections associated with AIDS.Magnetic Resonance Spectroscopy: 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).Aziridines: Saturated azacyclopropane compounds. They include compounds with substitutions on CARBON or NITROGEN atoms.Ethylene Oxide: A colorless and flammable gas at room temperature and pressure. Ethylene oxide is a bactericidal, fungicidal, and sporicidal disinfectant. It is effective against most micro-organisms, including viruses. It is used as a fumigant for foodstuffs and textiles and as an agent for the gaseous sterilization of heat-labile pharmaceutical and surgical materials. (From Reynolds, Martindale The Extra Pharmacopoeia, 30th ed, p794)Selenic Acid: A strong dibasic acid with the molecular formula H2SeO4. Included under this heading is the acid form, and inorganic salts of dihydrogen selenium tetraoxide.Selenium: An element with the atomic symbol Se, atomic number 34, and atomic weight 78.96. It is an essential micronutrient for mammals and other animals but is toxic in large amounts. Selenium protects intracellular structures against oxidative damage. It is an essential component of GLUTATHIONE PEROXIDASE.Anorexia Nervosa: An eating disorder that is characterized by the lack or loss of APPETITE, known as ANOREXIA. Other features include excess fear of becoming OVERWEIGHT; BODY IMAGE disturbance; significant WEIGHT LOSS; refusal to maintain minimal normal weight; and AMENORRHEA. This disorder occurs most frequently in adolescent females. (APA, Thesaurus of Psychological Index Terms, 1994)Food Additives: Substances which are of little or no nutritive value, but are used in the processing or storage of foods or animal feed, especially in the developed countries; includes ANTIOXIDANTS; FOOD PRESERVATIVES; FOOD COLORING AGENTS; FLAVORING AGENTS; ANTI-INFECTIVE AGENTS (both plain and LOCAL); VEHICLES; EXCIPIENTS and other similarly used substances. Many of the same substances are PHARMACEUTIC AIDS when added to pharmaceuticals rather than to foods.Bulimia Nervosa: An eating disorder that is characterized by a cycle of binge eating (BULIMIA or bingeing) followed by inappropriate acts (purging) to avert weight gain. Purging methods often include self-induced VOMITING, use of LAXATIVES or DIURETICS, excessive exercise, and FASTING.Nutritional Sciences: The study of NUTRITION PROCESSES as well as the components of food, their actions, interaction, and balance in relation to health and disease.Encyclopedias as Topic: 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)EncyclopediasDictionaries as Topic: Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.Molecular Sequence Annotation: The addition of descriptive information about the function or structure of a molecular sequence to its MOLECULAR SEQUENCE DATA record.Databases, Genetic: Databases devoted to knowledge about specific genes and gene products.Biography as Topic: A written account of a person's life and the branch of literature concerned with the lives of people. (Harrod's Librarians' Glossary, 7th ed)BiographyBooks, Illustrated: Books containing photographs, prints, drawings, portraits, plates, diagrams, facsimiles, maps, tables, or other representations or systematic arrangement of data designed to elucidate or decorate its contents. (From The ALA Glossary of Library and Information Science, 1983, p114)History, 19th Century: Time period from 1801 through 1900 of the common era.Internet: A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.

A novel push-pull Diels-Alder diene: reactions of 4-alkoxy- or 4-phenylsulfenyl-5-chalcogene-substituted 1-phenylpenta-2,4-dien-1-one with electron-deficient dienophiles. (1/16)

5-(phenylselenenyl)- and 5-(phenylsulfenyl)-4-ethoxy-1-phenyl-2,4-pentadien-1-ones (2) and (3) underwent [4+2] cycloaddition with N-methyl and N-phenylmaleimides and successive isomerization to give the 7-benzoyl-3a,4,5,7a-tetrahydro-1H-isoindole-1,3(2H)-diones 5, 8 and 9 in good yields. The 4-ethoxy group on the 2,4-pentadien-1-one was found to be effective to facilitate the cycloaddition with dienophiles. We also performed other [4+2] cycloadditions of 2,4-pentadien-1-ones with DMAD or naphthoquinone.  (+info)

Redox catalysts as sensitisers towards oxidative stress. (2/16)

The predominance of oxidative stress in many tumour cell environments provides a means to selectively target these cells via protein oxidation. The zinc fingers of transcription factors utilise cysteine thiols for structural zinc coordination. Redox control of DNA binding regulates transcription and therefore the overall rates of proliferation, apoptosis and necrosis in the carcinoma. We report here the adverse effects of glutathione peroxidase (GPx) mimics towards zinc finger motifs and PC12 cell survival. Nanomolar catalyst concentrations facilitated H2O2-induced oxidation of an Sp1 transcription factor fragment. In PC12 cells GPx catalysis triggered a significant increase in cell death, correlating with severity of oxidative stress. As a consequence, we conclude that GPx mimics are potential chemotherapeutic agents.  (+info)

Synthesis and properties of benzo[a]phenoxazinium chalcogen analogues as novel broad-spectrum antimicrobial photosensitizers. (3/16)

The goal of this investigation was to develop improved photosensitizers for use as antimicrobial drugs in photodynamic therapy of localized infections. Replacement of the oxygen atom in 5-(ethylamino)-9-diethylaminobenzo[a]phenoxazinium chloride (1) with sulfur and selenium afforded thiazinium and selenazinium analogues 2 and 3, respectively. All three dyes are water soluble, lipophilic, and red light absorbers. The relative photodynamic activities of the chalcogen series were evaluated against a panel of prototypical pathogenic microorganisms: the Gram-positive Enterococcus faecalis, the Gram-negative Escherichia coli, and the fungus Candida albicans. Selenium dye 3 was highly effective as a broad-spectrum antimicrobial photosensitizer with fluences of 4-32 J/cm2 killing 2-5 more logs of all cell types than sulfur dye 2, which was slightly more effective than oxygen analogue 1. These data, taken with the findings of uptake and retention studies, suggest that the superior activity of selenium derivative 3 can be attributed to its much higher triplet quantum yield.  (+info)

Cesium carbonate-catalyzed alpha-phenylchalcogenation of carbonyl compounds with diphenyl dichalcogenide. (4/16)

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Intramolecular chalcogen-tin interactions in [(o-MeEC6H4)CH2]2SnPh(2-n)Cl(n) (E = S, O, CH2; n = 0, 1, 2) and intermolecular chlorine-tin interactions in the meta- and para-methoxy isomers. (5/16)

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Mitochondrial dysfunction induced by different organochalchogens is mediated by thiol oxidation and is not dependent of the classical mitochondrial permeability transition pore opening. (6/16)

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Mysteries of TOPSe revealed: insights into quantum dot nucleation. (7/16)

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Chalcogenidobis(ene-1,2-dithiolate)molybdenum(IV) complexes (chalcogenide E = O, S, Se): probing Mo identical withE and ene-1,2-dithiolate substituent effects on geometric and electronic structure. (8/16)

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The reactions of a diborene with elemental selenium or tellurium are shown to afford a diboraselenirane or diboratellurirane, respectively. These reactions are reminiscent of the sequestration of sub-valent oxygen and nitrogen in the formation of oxiranes and aziridines; however, such reactivity is not known between alkenes and the heavy chalcogens. While carbon is too electronegative to facilitate the reduction of elements of lower relative electronegativity, this is overcome by the highly reducing nature of the double bond in diborenes. The capacity of multiple bonds between boron to donate electron density is highlighted in a reaction where diboryne is shown to behave as nucleophile, attacking diarylditellurides in the formation of a diboratellurenium cations with aryltelluride anions.. ...
Chalcogen bonding is a type of noncovalent interaction in which a covalently bonded chalcogen atom (O, S, Se or Te) acts as an electrophilic species towards a nucleophilic (negative) region(s) in another or in the same molecule. In general, this interaction is strengthened by the presence of an electron-with 2017 Frontier and Perspective articles
How about adding detection of protein-ligand chalcogen bonding in the docking results? There is a lot of interest in Ch (S, Se, or Te) ---O, N (protein) interactions for drug design. A recent paper of mine describes some interesting ones in the PDB: M. O. Mitchell. Discovering protein-ligand chalcogen bonding in the protein data bank using endocyclic sulfur-containing heterocycles as ligand sesrch subsets. J. Mol. Model. 2017, 23(10):287. doi: 10.1007/s00894-017-3452-3 ...
China Calcium Carbide Above 295L/Kg Gas Yield Withe SGS Tested, Find details about China Calcium Carbide, Calcium Carbide 295L/Kg from Calcium Carbide Above 295L/Kg Gas Yield Withe SGS Tested - Tian Jin Shi Jin Hong Wei Bang Chemical Limited Company
View patents for Carbon compounds: chalcogen or nitrogen are the only ring hetero atoms - claims, drawings, descriptions, and more invention details.
Search for Boron Acids Or Salts Thereof (i.e., Compounds Having -xh, Wherein X Is Chalcogen, Attached Directly To Boron By Nonionic Bonding And Wherein The Hydrogen May Be Replaced By A Group Ia Or Iia Light Metal, Or By Substituted Or Unsubstituted Ammonium) Patents and Patent Applications (Class 562/7) Filed with the USPTO
Witching Hour. -- Sparta, Ill. : National Periodical Publications, 1969-1978. -- col. ill. ; 26 cm. -- Published no. 1 (Feb./March 1969)-no. 85 (Oct. 1978). -- Horror. -- LIBRARY HAS: no. 1-14, 16-29, 31-32, 34, 37-40, 42-53, 57, 60-61, 66-69, 71-72, 74-75, 77, 81-83 (1969-1978). -- Call no.: PN6728.3.N3W5 ----------------------------------------------------- Witching Hour, no. 1 (Feb./Mar. 1969) CONTENTS: "Let the Judge Be You" (framing sequence) 6 p. -- "Save the Last Dance For Me" 5 p. -- "Eternal Hour!" 8 p. -- "The Perfect Surf" 5 p. -- Data from M. Tiefenbacher and G. Reed. -- Call no.: PN6728.3.N3W5no.1 ----------------------------------------------------- Witching Hour ; no. 2 (Apr./May 1969) CONTENTS: "Yarrghh!" 7 p. -- "The Trip of Fools!" 8 p. -- "The Beat Goes On!" 1 p. -- "Once Upon a Surprise Ending!" 5 p. -- "Sargon, the Sorcerer" (Fact File #6) 1 p. text -- Call no.: PN6728.3.N3W5no.2 ----------------------------------------------------- Witching Hour, no. 3 (July 1969) CONTENTS: ...
Interestingly, a recent study by Ohno et al. (2014) demonstrated that deletion of SNPH is counterproductive to axonal survival in acute demyelination. They proposed that SNPH serves an adaptive function by creating large-volume, stationary mitochondria to better fit the energy demands of acutely demyelinated axons and help them survive. In contrast, our studies demonstrate that SNPH deletion in chronic dysmyelination (Shi) dramatically prolongs survival and prevents neural damage. It is clear that these two studies address different phases of MS. We propose a biphasic model for the functional impact of SNPH during MS: mitochondrial anchoring by SNPH is adaptive in the early phase (Fig. 12A) and maladaptive in the late phase (Fig. 12B).. During the early phase of acute myelin loss, as in the study of Ohno et al. (2014), SNPH is modestly elevated to arrest motile mitochondria to meet metabolic demands to keep axons alive (Fig. 12A). Deletion of SNPH at this stage is detrimental to axons. However, ...
Hybrid double perovskites have recently gained a vast amount of attention in the research area of photovoltaics as lead-free alternatives to the ground-breaking parent material [CH3NH3]PbI3.1 In double perovskites with the general formula A2BBX6, two Pb2+ cations are effectively replaced with a monovalent B and a trivalent B cation. Among the many fascinating properties of hybrid inorganic-organic perovskites, it is arguably the combination of strong light absorbance and long carrier lifetimes that make them so interesting for photovoltaic applications and light-emission devices. Recent experimental and theoretical studies on [CH3NH3]PbI3 revealed a direct-indirect character of the bandgap, i.e. [CH3NH3]PbI3 exhibits a direct band gap which is only approximately 47-60 meV higher in energy than the indirect band gap. Presumably, this is the origin of the paradox of strong absorption and long charge carrier lifetimes. When now turning our attention to lead free double perovskites, examples ...
Iron zinc sulphide ternary thin film has been grown on glass substrate and characterized using a spectrophotometer. The optical properties considered revealed high absorbance and reflectance but low transmittance in the UV; low values of absorbance and reflectance accompanied by high transmittance in the VIS. The direct band gap and indirect band gap obtained are 2.3eV and 1.9eV. The possible applications were discussed.. ...
Provided are antibacterial and antimicrobial surface coatings and dental materials by utilizing the antimicrobial properties of copper chalcogenide and/or copper halide (CuQ, where Q=chalcogens includ
In the current study, we sought to identify proteins regulating mitochondrial docking in axons. By applying a proteomic approach and cell biological assays combined with time-lapse imaging in live neurons, we reveal that LC8 enhances the SNPH-mediated mitochondrial docking efficiency through modulating the dynamic interaction between the docking receptor and axonal cytoskeleton. Four lines of evidence support this view. First, SNPH selectively interacted with LC8 via its seven-residue LC8-binding motif (ERAIQTD). The SNPH-LC8 complex was detected in vivo by coimmunoprecipitation of brain homogenates from snph wild-type but not snph (−/−) mice; the interaction occurred independently of the dynein motor complex. Second, SNPH recruited LC8 to axonal mitochondria via its LC8-binding motif. Deleting this motif reduced the efficiency of SNPH in docking axonal mitochondria. Furthermore, elevated LC8 expression inhibited the mobility of axonal mitochondria through endogenous SNPH. LC8 ...
Description: Compounds in which the five-membered hetero ring has sulfur in the 1-position, nitrogens in the 2- and 5-positions, and carbons in the remaining two positions ...
The team wanted to know whether this hole could act as a vacuum cleaner, like hydrogen, if it were placed in contact with a substrate. If this were the case, sulfur could be used as a catalyst, causing molecules to transform themselves. This somewhat unorthodox bond, known as a chalcogen bond, would thus replace the conventional hydrogen bond.. As Professor Matile further explains: "To test our hypothesis, we created and tested a series of molecular structures using chalcogen bonds of gradually increasing strength. We noticed that they not only work, but that they increase the speed of the transformation by more than a thousand times, as when there is no catalyst. Additionally, we achieved a degree of precision that is impossible with hydrogen bonds." In fact, hydrogens entire surface is electron poor.. Thus, when it is playing the role of catalyst, the entire atom can come into contact with the substrate and suck up negative charges all over. However, with sulfur, only a small area can act ...
Tumors adapt to an unfavorable microenvironment by controlling the balance between cell proliferation and cell motility, but the regulators of this process are largely unknown. Here, we show that an alternatively spliced isoform of syntaphilin (SNPH), a cytoskeletal regulator of mitochondrial movements in neurons, is directed to mitochondria of tumor cells. Mitochondrial SNPH buffers oxidative stress and maintains complex II-dependent bioenergetics, sustaining local tumor growth while restricting mitochondrial redistribution to the cortical cytoskeleton and tumor cell motility. Conversely, introduction of stress stimuli to the microenvironment, including hypoxia, acutely lowered SNPH levels, resulting in bioenergetics defects and increased superoxide production. In turn, this suppressed tumor cell proliferation but increased tumor cell invasion via greater mitochondrial trafficking to the cortical cytoskeleton. Loss of SNPH or expression of an SNPH mutant lacking the mitochondrial localization ...
There are currently no H.O.C. members. Im just getting back in a position to do that again, but at the same time, I dont really want to rush into it. While I love doing H.O.C., it got to a point where it wasnt very enjoyable. Im not just going to pick up the first guy on a bar stool that says he can go on tour this time. Playing ability will come first and foremost. If I can get 3 great musicians that are willing to play in Head On Collision and tour and all that, then I will do it. Otherwise, Im not sure I see a point in doing it, to be honest. That goes for any "live band," as a matter of fact. I really dont need to waste my time playing with people if their goals arent ambitious. Lucifer D. Larynx never really "stopped" or anything. The other "main guy," Joe had to move to another state for work/family and while we planned on doing more stuff, we never had the time. I told Joe I was going to write a ton of new tunes and start recording them as soon as I was able to upgrade my recording ...
10. You guys have recently started playing live shows, are people "getting" what you maniacs are all about? Do you have any insane live stories to tell us about? Yeah we are slowly setting up gigs and mini-tours, we didnt play a lot just yet but so far the shows went great people dug it and understood what we are going for, headbanging , fist pumping and pits have been witnessed so I would say, mission accomplished. No insane stories yet, sorry. 11. Do you have any stories related to the Red Light District that youd like to share? Hehe Sorry to dissapoint haha. I havent even seen it in person myself, mainly these days its just a tourist attraction, with import hookers behind the windows, not too special for us but I guess everywhere else in the world its a big thing. I imagine its fun to see once in your life but I heard Amsterdam is trying to clean it up and destroy it all like what happened to 42nd street in New York replace it all with neat and tidy Disney stores and what not. 12. To be ...
Find water, he tells them as he walks slowly down a row of vines holding the rods pointed in front of him. [...] isnt the whole woo-woo thing a little undignified for a descendant of California wine royalty - not to mention the vice president of Charles Krug Winery? Try telling that to grape growers in Northern California, who repeatedly call on Mondavi to seek out water for their industrial-size wells. Mysterious ability Hes a bona fide water witch - someone who can find groundwater without the use of science. Theres no scientific evidence to support the practice - in fact, most science experiments to determine its authenticity have concluded that dowsers find water no better than the rate of chance. [...] people throughout rural America hire water witches - sometimes instead of geologists, sometimes in conjunction with them - to find the best place to dig a well. The U.S. Geological Survey is lukewarm about the practice, warning, No single technique suffices to locate favorable water well
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An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine ...
Greetings- , My Blood Sugars at night have been all over the place- lots of lows , followed by highs- a mess. My endo is talking about being tested for , gastro-paresis. I know it has to do withe nerve endings in the tummy , not responding like they did in days of yore (been diabetic over 33 , years) - and that theres medication available to help the stomach empty , faster but what about that test - swallowing Radio-Active material in a , sandwich somes very nasty indeed - I dont want that in my body. Any , other options? Write soon- the test is set for Friday, the 30th. , Also what are the other symptoms? Are there any FAQs available - , somewhere? Thanks. Several, do a search of Medline (see the SEARCH page) and take a look at the material under Other Diabetes Links on the LINKS page. You want the Center for Disease Control doctor and patient guides. email @ redacted Insulin-Pumpers website http://www.bizsystems.com/Diabetes/ ...
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With my oldest, I found the convenience of babywearing to be indispensable. In his early weeks, he often napped in a carrier, preferring the warmth and movement over a flat bed. It also provided him with a familiar place to nap while out of the house. When teething hit, it hit hard, and many days I would walk around the house with him tucked contentedly in a wrap and a book in my hand. During each evenings "witching hour", I would wrap him up snuggly and go for a long walk through our favourite trail. With him secure on my back, I could browse our local farmers market without the inconvenience of a stroller. During stages when he wanted to be held more often than not, it allowed me to get housework done and food on the table while meeting his needs at the same time ...
My doctor mentioned that there were some organic chemicals withe the name Catecholamines. Having know for a while a lot of biochemicals, like lact...
Dowsing, which originated in 15th century Germany, was predominantly used to divine the presence of ground water, thereby, giving it the nickname of water witching. In the modern era, diviners make us...
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Although I dont wish these newborn days away I do wish you would enjoy life a little more between the hours of 5-9pm. Just as your big sister and daddy are getting home and we finally get to be a family all together in the evenings....you start your witching hours. We take turns trying to make you happy, but you sure can exercise your lungs during those hours! Sometimes the porch swing, going on a stroller ride or car ride, or swaddling and bouncing can help but usually I just nurse you as much as possible during those hours. That makes dinner time, gym time, church time, or any other evening activity a little difficult at the moment but I know it wont last forever and if the cluster feeding at night helps you sleep such a long stretch...I can deal with it ...
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The invention concerns materials which exhibit photonic band gaps in the near infrared and visible regions of the optical spectrum and methods of preparation of such materials.
Browse many computed properties for this orthorhombic Ti24Ga5S48 compound, including formation energy from the elements, energy of decomposition into the set of most stable materials at this chemical composition, bulk crystalline density, and band gap. Cite this material using DOI 10.17188/1284299.
Browse many computed properties for this trigonal Te2W2SeS compound, including formation energy from the elements, energy of decomposition into the set of most stable materials at this chemical composition, bulk crystalline density, and band gap. Cite this material using DOI 10.17188/1405656.
0029] The group I-B metal and the chalcogen element-containing organic compound may be chemically bonded to each other. Further, the group III-B metal and the chalcogen element-containing organic compound may be chemically bonded to each other. Still further, the chalcogen element-containing organic compound and the Lewis base organic solvent may be chemically bonded to each other. Through the chemical bonds as described above, a higher-concentration material solution of 8 wt % or higher can be prepared more easily. Examples of the above-mentioned chemical bonds include coordinate bond between respective elements. Such chemical bond can be confirmed by, for example, a nuclear magnetic resonance (NMR) technique. In the NMR technique, the chemical bond between the group I-B metal and the chalcogen element-containing organic compound can be detected as a peak shift of multinuclear NMR of a chalcogen element. The chemical bond between the group III-B metal and the chalcogen element-containing ...
Inks for obtaining? In situ? of chalcogens and / or chalcogenides that give rise to semiconductor layers, their obtaining and method of use. # The present invention relates to a composition of inks for the in situ obtaining of chalcogens and / or chalcogenides characterized in that it comprises at least one compound Chalcogenite of formula selected from a group consisting of SeO {sub, 2}, M (SO {sub, 3}) {sub, n}, M (SeO {sub, 3}) {sub, n} and M (TeO {sub, 3}) {sub, n}, where 0.5 |= n |= 2 and M is at least one metallic element. It also refers to the inks obtained from said composition, its method of obtaining and its use for the preparation? In situ? of semiconductor materials.
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Hydrogen chalcogenides (also chalcogen hydrides or hydrogen chalcides) are binary compounds of hydrogen with chalcogen atoms (elements of group 16: oxygen, sulfur, selenium, tellurium, and polonium). Water, the first chemical compound in this series, contains one oxygen atom and two hydrogen atoms, and is the most common compound on the Earths surface. The most important series, including water, has the chemical formula H2X, with X representing any chalcogen. They are therefore triatomic. They take on a bent structure and as such are polar molecules. Water is an essential compound to life on Earth today, covering 70.9% of the planets surface. The other hydrogen chalcogenides are usually extremely toxic, and have strong unpleasant scents usually resembling rotting eggs or vegetables. Hydrogen sulfide is a common product of decomposition in oxygen-poor environments and as such is one chemical responsible for the smell of flatulence. It is also a volcanic gas. Despite its toxicity, the human body ...
Oxygen is classified as a nonmetal. In the periodic table, it is located at the top of group 16 (formerly group 6A), which is a family of elements called the chalcogens or the oxygen family. In addition, it lies between nitrogen and fluorine in period 2.. At ordinary temperatures and pressures, free oxygen (unbound to any other element) is a colorless, odorless, tasteless gas that makes up about 21% (by volume) of air. Ordinarily, each molecule of oxygen gas consists of two oxygen atoms bound to each other, so the molecular formula is written as O2.. This molecular oxygen (O2) is essential for the human bodys metabolic processes, which sustain our lives. The human body cannot store oxygen for later use as it does with food. If the body is deprived of oxygen for more than a few minutes, unconsciousness results. The bodys tissues and organs (notably the heart and brain) are damaged if deprived of oxygen for much longer than four minutes.. Gaseous oxygen becomes a liquid at temperatures below ...
The Chemical Reactivity of elements in the p-block increments as we move towards right in a period. Be that as it may, as we move down in a group the chemical reactivity of elements declines down the group.. i) Reactivity of Noble Gases: All the orbitals of the noble gasses are totally filled by electrons and it is exceptionally hard to break their stability in any way whether it is the removal of electrons or addition of electrons. Hence the noble gasses show low compound reactivity. In light of their low reactivity noble gasses, are regularly utilized when a nonreactive climate is required, for example, in welding.. Going before the noble gas family there are two chemically essential groups of non-metals. They are the halogens (Group 17) and the chalcogens (Group 16). These two groups of elements have high electron gain enthalpies and can promptly include one to two electrons framing an anion to achieve the steady noble gas configuration in this way indicating great chemical ...
α-CuIn1-xGaxSe2 based materials with direct band gap and high absorption coefficient are promising materials for high efficiency hetero-junction solar cells. CIGS champion cell efficiency (19.9%, AM1.5G) is very close to polycrystalline silicon (20.3%, AM1.5G). A reduction in the price of CIGS module is required for competing with well matured silicon technology. Price reduction can be achieved by decreasing the manufacturing cost and by increasing module efficiency. Manufacturing cost is mostly dominated by capital cost. Device properties of CIGS are strongly dependent on doping, defect chemistry and structure which in turn are dependent on growth conditions. The complex chemistry of CIGS is not fully understood to optimize and scale processes. Control of the absorber grain size, structural quality, texture, composition profile in the growth direction is important to achieving reliable device performance. In the present work, CIS and CGS nanoparticles were prepared by a liquid phase synthesis ...
NOVEL USE OF ORGANIC COMPOUNDS - The present invention refers to compounds of the general formulae I as defined above, preferably α-mangostin, for use as/in a composition (especially foods and dietary supplements, cosmetic, as well as pharmaceutical compositions) for the prevention and improvement of muscular disorders and for the improvement of muscle function and endurance. Other fields of use are eating disorders such as bulimia and anorexia nervosa, use for accelerating wound healing, and/or use for the treatment/prevention of bone disorders such as osteoporosis and osteopenia. The present invention is also directed to dietary compositions such as (fortified) food, beverages, (fortified) feed, food additives, beverage additives, feed additives, clinical nutrition, dietary supplements, functional food, functional feed and nutraceuticals and to pharmaceutical compositions containing such compounds, to methods of preventing and/or treating the above mentioned disorders/diseases, as well as to ...
Chemical Entities of Biological Interest (ChEBI) is a freely available dictionary of molecular entities focused on small chemical compounds.
Elsa finally confronts the General, who has usurped the deadly cult started by Elsas father. But she falls all too easily into his sadomasochistic trap, and theres no way out - unless Kara is willing to make a sacrifice she never imagined. Final issue.
Light that has a energy equal to or higher than Eg can excite the electrons across the junction; however, light that has lower energy, will pass through. Therefore, a material with a low band gap energy can utilize more light in the electromagnetic spectrum. Consequently, a photon with higher energy than Eg will not create a larger voltage than one with equal energy to the band gap. The size of the band gap dictates the energy generated by exciting an electron. A smaller band gap will result in lower energy; therefore, there is a balance between having a small band gap that will utilize many photons and having a large band gap that will utilize fewer photons, yet generate more energy from them. The optimum band gap is at approximately 1.4 eV and the theoretical limit of a single junction cell with this Eg is approximately 31% [3]. The actual efficiency and theoretical efficiency are greatly improved on with the addition of multiple pn junctions and therefore multiple band gaps. With various band ...
Dilute nitride GaInN(Sb)As with a band gap (E{sub g}) of 1.0 eV is a promising material for the integration in next generation multijunction solar cells. We have investigated the effect of a compositionally graded GaInNAs absorber layer on the spectral response of a GaInNAs sub cell. We produced band gap gradings (ΔE{sub g}) of up to 39 meV across a 1 μm thick GaInNAs layer. Thereby, the external quantum efficiency-compared to reference cells-was increased due to the improved extraction of photo-generated carriers from 34.0% to 36.7% for the wavelength range from 900 nm to 1150 nm. However, this device figure improvement is accompanied by a small decrease in the open circuit voltage of about 20 mV and the shift of the absorption edge to shorter wavelengths. ...
Amorphous alloys of aluminum nitride and gallium nitride deposited at 100 K at compositions ranging from pure AlN to pure GaN with optical band gaps which vary linearly with composition from 3.27 eV (a-GaN) to 5.95 eV (a-AlN) have been synthesized. Ab initio molecular dynamics calculations for these alloys reproduce the band gap versus composition data and give specific information on the electronic localization of the band tail states. There are no midgap states in amorphous Al[sub x]Ga[sub 1-x]N alloys. The calculated models have mixed four-fold and three-fold coordination and have no wrong (homopolar nuclear) bonds, demonstrating the strong ionicity in amorphous Al[sub x]Ga[sub 1-x]N alloys. It has been found that the valence band tail states are mostly localized on the three-fold coordinated N sites while the conduction band tail states are mostly localized on the three-fold coordinated Ga or Al sites. © 2000 American Institute of Physics ...
3-(N-R2 -N-Acylamino)-7-(N-R3 -N-R4 -amino)-10-acylphenothiazines and phenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 3-(N-R2 -amino)-7-(N-R3 -N-R4 -amino)phenothiazinium or phenoxazinium halide with a reducing agent to obtain the corresponding leuco compound and subsequently interacting the leuco compound with at least two molecular proportions of an acylating agent.
In this paper, four diiron toluene-3,4-dithiolate complexes with phosphine ligands were synthesized and characterized. Treatment of complex [Fe2(CO)6{μ
Name: Drug, bio-affecting and body treating compositions > Designated organic active ingredient containing (doai) > Phosphorus containing other than solely as part of an inorganic ion in an addition salt doai > P-x-x containing (x is chalcogen ...
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Tuesday-Jamey friend come around 9:30PM for about hour and half. Then we drove to Cody,WY. Jamey find a tire place to get tires for the car trailer. So Jamey and I took the RV to wash it. Jamey wash the front of the RV . Then he drive the RV half way out. So he could wash the back of the RV. After he got done washing the RV. Jamey start to drive out of the car wash. We heard a bad sound. Jamey got out to check. He hit the wall and the left side turn sign on the RV was broken. We pick up Stori and the kids at a Wal-Mart. We go to the camp ground. Livia and Parker was so Happy to get out of the RV. They run out to play. Livia and Parker come in laughing. Because Parker went out side in his underwear. Everyone was laughing. I paid for dinner. Stori and I talk. I tip the lady $20.00. So the bill was $114.63 withe tip. ...
If you are going to speak out against any part of the Old or New Testament or about those who do believe In knowledge, Moral truths, or spiritual things that you do not accept for yourself and want to correct the believers ignorance that frustrates or insults your common sense and reality,at least read the book and argue with what is written in your own mind and present your evaluations from a mind that has researched the subject enough to have a valid opinion If you do this your opinion will be not only treated with respect but also you will be more familiar withe the subjects and issues which is alway a confidence builder.If this thing we call the word of truth is a lie and a fable to you read it and look for the things you can point out as being false and cover at least a couple chapters if not the Old or new Testament as a whole just to be fair. ...
If you are going to speak out against any part of the Old or New Testament or about those who do believe In knowledge, Moral truths, or spiritual things that you do not accept for yourself and want to correct the believers ignorance that frustrates or insults your common sense and reality,at least read the book and argue with what is written in your own mind and present your evaluations from a mind that has researched the subject enough to have a valid opinion If you do this your opinion will be not only treated with respect but also you will be more familiar withe the subjects and issues which is alway a confidence builder.If this thing we call the word of truth is a lie and a fable to you read it and look for the things you can point out as being false and cover at least a couple chapters if not the Old or new Testament as a whole just to be fair. ...
We were in crunch time yesterday - that hour or so when its too early for bath time / bed time but the kids are tired and wired at the same time...some people call it the witching hour...we just hang on tight and ready for the coming chaos ...
We do - if crime rises or a new problem emerges and theres a large number of complaints from the public, new laws and legislation are introduced to deal withe the problem while making sure the vast majority of law abiding people are unaffected.People write o their MP about an issue and get the to try and pass a law against a new emerging threat or to repair a failed system (apart from their own expenses of course ...
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Hello. Im a first time poster...one week lurker :) I have just been diagnosed with a 1.8cm Cavernous Carotid Aneurysm. My Cerebral Angiogram was 3 days ago. My neurosurgeon wants to do a stent (no coils) which Ive come to terms with. My question is, the doctor used a StarClose closure, which Im just finding out is made of Nickel and Titanium, and I have a sensitivity/allergy to Nickel. Has anyone who is sensitive or allergic to Nickel had this and had any issues or reactions withe
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Glynn drops a homespun tale straight from the sticks of rural Michigan... "witching" water for a family well. Bottled at the source, this true "Snap Judgment" story features host Glynn Washington doing what he does best... telling tales. Glynn is but seven years old watching his family pour their last dollars down a well. Hear how the search for water forces a disturbing Snap Judgment! ...
CHAPTER THIRTEEN. The night is made up of so many colours. Not only colours… textures too. There is the velvety softness of indigo, the sort you long to rub your face against and bury your sadness in, hoping that it will muffle the emotion as it would deaden the sound of church bells. Then there is the smooth sensuality of pure blackness, like treacle pouring over your body and caressing it as it coats and covers. Twilight is silent; dark and lightless, silhouetting all objects and removing dimensions from everything it touches; it whispers and shrouds, preparing for the witching hours. Dawn seeps through, watery and grey, killing the night and bearing with it a feeling of death, light fingers revealing the greyness of its body in its state of eternal slumber.. Tomorrow, the dawn will light upon the body of Thomas, my friend whom I must kill. My tears shatter the dream of nights which shimmers so slightly in a puddle below the seat of the swing on which I sit. The fragments are like the ...
A simple expression is proposed for the band gap narrowing (or shrinkage) in semiconductors using optical absorption measurements of spin coated 1 at. % Ga-doped ZnO (with additional 0-1.5 at. % zinc species) thin films as ΔE{sub BGN} = Bn{sup 1/3} [1 − (n{sub c}/n){sup 1/3}], where B is the fitting parameter, n is carrier concentration, and n{sub c} is the critical density required for shrinkage onset. Its uniqueness lies in not only describing variation of ΔE{sub BGN} correctly but also allowing deduction of n{sub c} automatically for several M-doped ZnO (M: Ga, Al, In, B, Mo) systems. The physical significance of the term [1 − (n{sub c}/n){sup 1/3}] is discussed in terms of carrier separation. ...
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Antimony trisulfide (Sb2S3) is found in nature as the crystalline mineral stibnite and the amorphous red mineral metastibnite. It is manufactured for use in safety matches, military ammunition, explosives and fireworks. It also is used in the production of ruby-colored glass and in plastics as a flame retardant. Historically the stibnite form was used as a grey pigment in paintings produced in the 16th century. It is a semiconductor with a direct band gap of 1.8-2.5 eV.[citation needed] With suitable doping, p and n type materials can be produced. Sb2S3 can be prepared from the elements at temperature 500-900 °C: 2Sb + 3S → Sb2S3 Sb2S3 is precipitated when H2S is passed through an acidified solution of Sb(III). This reaction has been used as a gravimetric method for determining antimony, bubbling H2S through a solution of Sb(III) compound in hot HCl deposits an orange form of Sb2S3 which turns black under the reaction conditions. Sb2S3 is readily oxidised, reacting vigorously with oxidising ...
We propose a two-dimensional (2D) tetragonal material: an yttrium nitride (t-YN) monolayer, with a distinguished combination of mechanical and electronic properties based on first-principles calculations. We find that the t-YN monolayer is a low direct band gap semiconductor (0.55 eV) with strong anisotropic
All the material is enormous and evil. "Devilskin" enters with distant whipping winds, and the cordial sounds of a music box-like lullaby, before the raging basses erupt like an abandoned palace of heaven crashing into a volcanic, abyssal maw. "Black Mirror" begins with a doomed gait, glorious sunken memories evoked through the dingy, dual bass. "Pretender to the Throne (Opus I: The Usurpers Spawn)" uses some interesting, shouting vocals along with the incredible basswork and synths. At :43, one of the greatest riffs ever kicks in, a vile march towards the jaws of Leviathan. "The Arcane Light of Hecate" is a ritual, orchestral piece without the metal elements...and yes, a creepy fucking saxophone solo! Unbelievable ...
So whats new?. The half-metals available to the researchers all contain atoms of transition metals: nickel, manganese, or lanthanum, etc. The team of researchers, which included physicists from Russia and Japan, has demonstrated a theoretical mechanism for achieving half-metallicity that requires no transition metal atoms. This possibility would have a number of useful applications, including in implantable devices.. The physicists suggest that "nonmetallic half-metals" be obtained from a special class of dielectric materials called charge- or spin-density wave insulators. The term charge- or spin-density wave refers to a state with periodic microscopic regions with nonzero average charge (spin) in the material. Theorists describe such systems as a quantum condensate of electron-hole pairs. For a pair of this kind to form, two valleys are required: One provides electrons, the other provides holes. It is the presence of two valleys in the original system that gives rise to spin-valley ...
We present a method to introduce a large biaxial tensile strain in an ultra-thin germanium-on-insulator (GOI) using selective oxidation of SiGe epilayer on silicon-on-insulator (SOI) substrate. A circular patterned Si0.81Ge0.19 mesa on SOI substrate with the sidewall protected by Si3N4 or SiO2 is selectively oxidized to generate local 12 nm GOI with high crystal quality, which shows enhanced photoluminescence due to large tensile strain. Direct band photoluminescence peak significantly shifts to longer wavelength as compared to that from bulk Ge due to a combination of strain-induced band gap reduction and quantum confinement effect.. ©2013 Optical Society of America. Full Article , PDF Article ...
ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES : : : Hetero ring is five-membered consisting of one nitrogen and four carbons (e.g., halopyrrolidines, etc.) : Polycyclo ring system having the five-membered hetero ring as one of the cyclos : Bicyclo ring system having the five-membered hetero ring as one of the cyclos (e.g., octahydroindoles, etc.) : Additional polycyclo heterocyclic ring system attached directly or indirectly to the bicyclo ring system by nonionic bonding : The additional polycyclo heterocyclic ring system has a lactone ring as one of the cyclos : Ring carbon of each of the two five-membered hetero rings is bonded directly to chalcogen or nitrogen (e.g., both rings may be bonded to the same nitrogen atom or to different nitrogen atoms, etc ...
The report summarizes the ZnSexTe(1-x) light-emitting diode work carried out under the present contract. It includes recent investigations of the thermodynamics of ZnSexTe(1-x) crystal growth which are concerned with the effects of varying the partial pressure of the chalcogen and the donor or acceptor doping. The report also reviews the status of the thin-film GaAs storage diode. The experimental procedures and results are described in some detail. Reproducibility and compatibility with integrated circuitry are satisfactory and make this device attractive for use in memory arrays. Preliminary results on radiation tolerance are also given. (Author)(*SEMICONDUCTOR DIODES
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So what happens at FED? On Friday night a big rah rah ceremony celebrating the armed forces. Im all for supporting our military forces but it comes off totally phony at an Amway function. Nothing wrong with celebrating our patriotism except when its done with a company thats a pyramid scheme. Some "patriotic" dude named Rick Green - does anyone know who the hell he is anyway? - will teach about free enterprise. I guess hes getting well paid because hes doing it in both cities. Afterwards Diamond speakers will talk about building "the business". Well thatll be a first. They never talked about that at the FEDs I went to! They all jabbered about being poor and then they saw the Amway business plan and set their goals on a mission to destroy people and rip them off and now they live in mansions and walk the beaches of the world while residual income rolls in for the rest of their lives. I dont recall what time the Friday night bullshit session got under way. Eight? Thats the typical witching ...
I spent the drive home processing. I was driving, so I didnt have a chance to frantically Google what the outcome could be; I just had to be alone with my brain for awhile. We stopped by the house on the way back to work and I immediately jumped on the internet and found some forums withe people asking the same thing. And in the first several forums I read, I didnt find anyone who said its terrible news. People said sometimes FETs take longer to implant and as such end up measuring behind for the first several weeks (which I knew already, due to my research about the low hCG levels - and could be why Im not getting morning sickness yet - Im just assuming though) and then they catch up after that. The only time it was bad was when there was no fetal pole and no flicker, both of which we saw. So Im not giving up hope ...
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What is Not Yours is Not Yours by Helen Oyeyemi - Oyeyemis first short story collection (or second if you count the linked story cycle Mr. Fox, though that volume feels much more coherent and of a single piece to me) feels a little like an opportunity for this brilliant author to try on different hats. The evocation of dark, nested fairy tales feels like Oyeyemi channeling Angela Carter. The wry surrealism, inflected by pop culture references, feels inspired by Kelly Link. And the stories that focus on Cambridge students, usually immigrants or the children of, reminded me a great deal of Zen Cho. All of which is to say that Oyeyemis voice isnt as distinctive here as it was in Mr. Fox or White is For Witching, but nevertheless she makes the stories in What is Not Yours is Not Yours her own. Some stories here are more self-contained than others, and feel like complete statements in their own right. "Sorry Doesnt Sweeten Her Tea" describes a young fathers bewildered helplessness as his ...
We numerically investigate counter-propagating beams in a one-dimensionally, periodic structure with non-instantaneous Kerr nonlinearity for the design of efficient optical limiters. The performance of the Photonic Band Gap optical limiter with different response times is compared with the instantaneous case. Dynamic range and the cutoff intensity can be improved over a range of relaxation times.. ©2009 Optical Society of America. Full Article , PDF Article ...
Hsin-Wei Wang, Emily Pentzer, Todd Emrick,* and Thomas P. Russell* have recently published an article in ACS Macro Letters.. Published January 21, 2014 edition. Wang et al. prepared fibrillar structures from a low band gap... Read More... ...
Guohua Hu, a fourth-year PhD student at St Johns is the lead author of new study which has successfully developed a formula for turning a new graphene-like material called black phosphorus (BP) into ink. The ink, which is compatible with conventional inkjet printing techniques, enables the high-speed and ultralow-cost mass production of next-generation laser and optoelectronic devices for use in industry and scientific research. For the first time, a team of scientists at the Cambridge Graphene Centre have developed a formula which transforms crystals of a two-dimensional nanomaterial similar to graphene into a functional ink. The study, reported in Nature Communications, has produced a unique ink that can be used for the high-speed, low-cost printing of BP-based laser and optoelectronic devices.. BP is a new material with properties that make it particularly attractive for use in laser and optoelectronic devices. It is a semiconductor with a direct band gap that is responsive to a wide range ...
A series of semi-crystalline, wide band gap (WBG) photovoltaic polymers were synthesized with varying number and topology of fluorine substituents. To decrease intramolecular charge transfer and to modulate the resulting band gap of D-A type copolymers, electron-releasing alkoxy substituents were attached to electron-deficient benzothiadiazole (A) and electron-withdrawing fluorine atoms (0-4F) were substituted onto a 1,4-bis(thiophen-2-yl)benzene unit (D). Intra- and/or interchain noncovalent Coulombic interactions were also incorporated into the polymer backbone to promote planarity and crystalline intermolecular packing. The resulting optical band gap and the valence level were tuned to 1.93-2.15 eV and −5.37 to −5.67 eV, respectively, and strong interchain organization was observed by differential scanning calorimetry, high-resolution transmission electron microscopy and grazing incidence X-ray scattering measurements. The number of fluorine atoms and their position significantly ...
Electronic structure of (13,0) and (15,0) zig-zag single wall carbon nanotubes (SWCNTs) under uniaxial strain are studied using order N, tight binding molecular dynamic (O(N) TBMD) simulation code designed by Dereli et.al. Total energy and Fermi energy levels are obtained as functions of strain. Band gap calculated from behavior of electronic density of states near fermi energy level for each strain values. The energy band gaps of these carbon nanotubes are modified by compressive and tensile strain and they exhibit semiconductor - metal and metal - semiconductor transitions.
The conditions are the same as for the earlier releases in the series. A sumptuous concert hall containing a large Steinway grand piano, a pianist and a sound technician/producer - in the dead of night, the witching hours. Thus the mood is set for Improvisational, Caprices CD series of improvisations by some of our most talented musicians. Once again, Mats demonstrates what an excellent pianist and improviser he is, having already made a name for himself as a cross-genre keyboardist who has accompanied such varied artists as Ale Möller, Frank Zappa, Morgan Ågren (Mats/Morgan Band), Lena Willemark, Ann-Kristin Hedmark and Jonas Knutsson. He also plays in his own trio with Filip Augustsson (bass) and Sebastian Voegler (drums). With a sense of playfulness, mood and tenderness, Mats improvises over Berndt Egerbladhs best-known songs, including You Never Come Closer, A Song for Amy, Worksong and Sarek. In one word: irresistible. ...
|b|Always Continuing South|/b| Springtime on a normaly weekday in the Bavarian Alps (South of Munich). I like the magical of the mountains, there are very strong and so powerful, it´s a wonderland in withe, blue, grey and fresh green. This places don´t need a lot of words, .. you breathe deeply and feel the freedom. If youre stand on this place with open eyes, it´s already to late! You can not defend and it magnetically pulls you into the world of mountains into, but it´s a wonderful feeling! ;-) Flickr-friends can view this shot in |a href=http://www.flickr.com/photos/allmannsberger/3582855384/sizes/l/| high-resolution|/a|. | |a href=http://www.flickr.com/photos/allmannsberger/page2/|View more pictures|/a| | Please visit my last shots on |a href=http://www.flickriver.com/photos/allmannsberger/ rel=nofollow| black|/a| too. Thanks for all your nicely comments, and for visit my stream! ;-) |b|Have a great week! ;-)) |/b| (copyright © by Klaus Allmannsberger - All rights
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Witch hazel is an interesting herb that Ive only recently found out about, it has been used for centuries by the Native Americans though. When I was researching witch hazel I assumed that it got its name for warding off witches or something, but it actually was used as a witching stick for locating underground sources of water and or precious minerals. Witch hazel might not be considered an herb by some due to the fact it is a woody shrub, but it has very strong astringent and antiseptic properties so I just had to include it in the list of herbs along with its uses. Today you can find witch hazel in pretty much any drugstore in the form of witch hazel water (an alcohol extract of the twigs). The only problem with this is that most of the time the extract contains very little of the actual herb, and most of the effects might actually come from the alcohol itself ...
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Rugger is a sport with bouts between individuals as part of the game in itself. After-fighting , and brawls with the referee may not be part of the rules, but such do occur even @ international games of As such, I do not envision the fact the Rajapakse siblings are are more "over doing" their roles as ex-players. This is just the way how the game of rugby is being played.. I was the PTI in-charge of the rugby team of the University of Moratuwa in the late 1990s when we played the Division II tournament @ that time. We used to lose by Cricket scores to teams like the the Havelock Bambaras and the Police xxx team. ( I may be confused withe the team names) It was all taken in good spirit, and we even traveled to Hatton to play the the Dimbulla Planters team then.. Anyways, I just wanted to raise the point that being involved in Rugby is part of being in brawls , and as such these events should not be taken out-of-context.. Cheers!. Dharshana W, Ph.D.. ...
Next came another idea that we thought would be fun to take as a hostess gift for those Memorial Day invites you receive or any other picnic and/or party this summer. Jams and jellies wont melt in the heat. They are yummy poured over a brick of cream cheese and then spread onto your favorite crackers. The jams and jellies could also serve as a fun Fathers Day gift. I used the round coasters to create a secure bottom for the cello wrap. I painted the coaster withe Ranger Crackle Paint and ran some Distress Ink over the paint for a little masculine feel. I also choose the Changito BBQ stamp and used the Copic Markers to color in the image ...
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Describes measurements of band gap in optoelectronic nanodevices under intense electric field and strong external photo excitation Presents 100 open
Optical properties of semiconductor nanowires (NWs)/nanopillars (NPs), as individual or ensemble, have attracted significant research interest in recent years. Their potential applications range from solid-state lighting, photovoltaics, lasing and nonlinear optics to sensing and life sciences. Many of III-V NWs/NPs are particularly interesting for optoelectronic and photovoltaic applications, because of their direct band gap, high refractive index and superior electrical properties. These properties are beneficial for use in next generation solar cells by reducing the active cell thickness, while maintaining high efficiency. Furthermore, high second order nonlinearity coefficients of many III-V materials, for example GaAs and GaP, enhanced electric fields and tight confinement of optical modes make nanowaveguide geometries ideal for nonlinear effects.. The focus of this thesis is on the fabrication of III-V NPs, their optical properties and applications. Different methods for fabrication of NPs ...
In this work, Co3O4 nanorods were successfully prepared by microwave-assisted solid state decomposition of rod-like CoC2O4.2H2O precursor within a very short reaction time (6 min) without the use of a solvent/surfactant and complicated equipment. The as-obtained Co3O4 nanorods were fully characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-Vis), energy-dispersive X-ray spectroscopy (EDX), and magnetic measurements. TEM and SEM images showed that the Co3O4 nanorods have a length of 1-3 µm and diameter of 40-80 nm. FT-IR, XRD, EDX and selected-area electron diffraction demonstrated that the nanorods are composed of pure cubic phase Co3O4. Magnetic measurements at room temperature suggested the existence of a weak ferromagnetic behavior. The optical spectrum indicated two direct band gaps at 2.20 and 3.60 eV with a blue shift compared
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Witch hazel is an interesting herb that Ive only recently found out about, it has been used for centuries by the Native Americans though. When I was researching witch hazel I assumed that it got its name for warding off witches or something, but it actually was used as a witching stick for locating underground sources of water and or precious minerals. Witch hazel might not be considered an herb by some due to the fact it is a woody shrub, but it has very strong astringent and antiseptic properties so I just had to include it in the list of herbs along with its uses. Today you can find witch hazel in pretty much any drugstore in the form of witch hazel water (an alcohol extract of the twigs). The only problem with this is that most of the time the extract contains very little of the actual herb, and most of the effects might actually come from the alcohol itself ...
Improving solar panel efficiency has become increasingly important as the world searches for cheap renewable energy. Recent developments in the industry have focused on multi-layer cells, some of which use semiconducting dyes to absorb light in place of crystalline solids. In this paper, I characterize various dyes recently synthesized for use in solar panels. These dyes contain semiconducting nanoparticles enclosed primarily by the protein ferritin to limit particle size. The band gaps were measured using either optical absorption spectroscopy or measuring the photoluminescence spectrum, depending on the type of semiconductor. The results indicate that both manganese oxide and lead sulfide nanoparticles can be synthesized in ferritin and their band gaps tuned to slightly above and below 1 eV. In addition, it was shown that ferritin effectively protects against the photocorrosion which is common when particles are synthesized without its protection.
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Selenium is a chemical element with symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between those of its periodic table column-adjacent chalcogen elements sulfur and tellurium. It rarely occurs in its elemental state in nature, or as pure ore compounds. Selenium (Greek σελήνη selene meaning "Moon") was discovered in 1817 by Jöns Jakob Berzelius, who noted the similarity of the new element to the previously-known tellurium (named for the Earth).. Selenium is found impurely in metal sulfide ores, where it partially replaces the sulfur. Commercially, selenium is produced as a byproduct in the refining of these ores, most often during copper production. Minerals that are pure selenide or selenate compounds are known, but are rare. The chief commercial uses for selenium today are in glassmaking and in pigments. Selenium is a semiconductor and is used in photocells. Uses in electronics, once important, have been mostly supplanted by silicon semiconductor ...
In this work, InP and SnO2 were assembled on TiO2 nanotubes (NTs) using a hydrothermal method with a different order to obtain InP/SnO2/TiO2 NTs and SnO2/InP/TiO2 NTs. The energy band gaps of SnO2/InP/TiO2 NTs (2.96 eV) is lower than that of InP/SnO2/TiO2 NTs (3.15 eV), And the net current densities of SnO2/InP/TiO2 NTs (1.1 mA cm−2) is higher than that of InP/SnO2/TiO2 NTs (0.27 mA cm−2) in photo ...
Adsorption of organic molecules at a surface of titanium dioxide (101) anatase is studied using quantum-chemical density functional theory. Anatase can be used in solar cells. For the clean anatase surface the band gap is so large that only UV-light can excite electrons. Different groups with conjugated systems are attached to obtain a more suitable band gap. Phenol was attached in different positions to a cluster of anatase and geometry optimized using the B3LYP-functional. The geometry that was energetically most favorable was used to put in phenylmethanol, phenylethanol, naphthol, 2-phenanthrol, 1-pyrol and 2-perylol. To give a more realistic model of phenol at anatase, a study of a two- dimensional periodic anatase surface was also made. Molecular orbitals were calculated to study the overlap between HOMO and LUMO orbitals. The calculation shows that phenol will remain as a molecule and will not dissociate. The band gap gets smaller when molecules are attached at the cluster and with ...
group 16 (chalcogens). Period. period 6 Block. p-block Element category. Post-transition metal, but this status is disputed. ...
... is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group on the periodic ...
Chivers, Tristram; Laitinen, Risto S. (23 March 2015). "Tellurium: a maverick among the chalcogens". Chemical Society Reviews. ...
Similarly, phosphoramidites react with other chalcogens. When brought in contact with a solution of sulfur or a number of ...
Chivers, Tristram; Laitinen, Risto S. (2006). "Chalcogen-Nitrogen Chemistry". In Devillanova, Francesco. Handbook of Chalcogen ...
Pekonen, Pentti.; Hiltunen, Yrjō; Laitinen, Risto S.; Pakkanen, Tapani A. (1991). "Chalcogen ring interconversion pathways. 77 ...
Aluminium sometimes is[77] or is not[3] counted as a post-transition metal. It has a well shielded [Ne] noble gas core rather than the less well shielded [Ar]3d10, [Kr]4d10 or [Xe]4f145d10 core of the post-transition metals. The small radius of the aluminium ion combined with its high charge make it a strongly polarizing species, prone to covalency.[78] Aluminium in pure form is a soft metal (MH 3.0) with low mechanical strength.[79] It has a close-packed structure (BCN 12) showing some evidence of partially directional bonding.[80][n 10] It has a low melting point and a high thermal conductivity. Its strength is halved at 200 °C, and for many of its alloys is minimal at 300 °C.[82] The latter three properties of aluminium limit its use to situations where fire protection is not required,[83] or necessitate the provision of increased fire protection.[84][n 11] It bonds covalently in most of its compounds;[88] has an amphoteric oxide; and can form anionic aluminates.[60] Aluminium forms Zintl ...
Handbook of chalcogen chemistry. Volume 1 : new perspectives in sulfur, selenium and tellurium. Devillanova, Francesco A., Du ... These elements are all in the 16th periodic table column (chalcogens), so have similar properties. In each case, changing the ...
"Superconductivity in the chalcogens up to multimegabar pressures". Physical Review B. 65 (6): 064504. arXiv:cond-mat/0108267 . ...
Reactions with chalcogens are highly exothermic (release energy); the reaction with oxygen or air occurs at room temperature, ...
Mixed chalcogen halides also exist. In the gas phase the phosphorus pentahalides have trigonal bipyramidal molecular geometry ... The trihalides are fairly readily oxidized by chalcogens to give the corresponding oxyhalides or equivalents. Phosphorus(II) ...
Kelly, P. F.; Slawin, A. M. Z.; Williams, D. J.; Woollins, J. D. (1992). "Caged explosives: Metal-Stabilized Chalcogen Nitrides ... Chivers, T. (2004). A Guide To Chalcogen-Nitrogen Chemistry. Singapore: World Scientific Publishing. ISBN 981-256-095-5. Sharma ...
ISBN 0-12-335680-6. Chivers, T. (2004). A Guide To Chalcogen-Nitrogen Chemistry. Singapore: World Scientific. ISBN 981-256-095- ...
"Recent chemistry of the chalcogen diatomics". Tetrahedron. 53 (36): 12225-12236. doi:10.1016/S0040-4020(97)00555-3. Spencer, J ...
... forms binary compounds with the halogens and the chalcogens. Among its organometallic compounds is ferrocene, the first ...
The chalcogens react with each other to form interchalcogen compounds. Although no chalcogen is extremely electropositive, nor ...
... reacts with the chalcogens only at relatively high temperatures. At room temperature, gallium metal is not reactive ...
Combination of thulium and chalcogens results in thulium chalcogenides. Thulium reacts with hydrogen chloride to produce ...
Rare-earth elements, pnictogens, chalcogens, and halogens are not used as category names, but the latter three are valid as ... Chalcogens - The elements of group 16: O, S, Se, Te, Po. (Lv had not yet been named when the 2005 IUPAC Red Book was published ...
A chalcogel or properly metal chalcogenide aerogel is an aerogel made from chalcogens (the column of elements on the periodic ... "Chalcogen-Based Aerogels As Sorbents for Radionuclide Remediation". Environ. Sci. Technol. 47 (13): 75407547. Bibcode:2013EnST ...
They usually involve two metals and one chalcogen. Some of these materials have a direct bandgap, Eg, of ~ 1.5 eV, which makes ...
Chalcogen doped silicon, in particular, have low figures of merit due to their small non-radiative recombination lifetimes. To ... "Picosecond Carrier Recombination Dynamics in Chalcogen-hyperdoped Silicon." Applied Physics Letters 105 (2014): 053905-1-53905- ...
Oxygen is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that ...
Analogous to the behavior of other chalcogens, selenium forms hydrogen selenide, H2Se. It is a strongly odiferous, toxic, and ...
Being a soft metal, mercury forms very stable derivatives with the heavier chalcogens. Preeminent is mercury(II) sulfide, HgS, ...
For example, group 16 is variously described as the oxygen group and as chalcogens. In history, several sets of group names ...
... there are a total of 13 chalcogen fluorides, nine chalcogen chlorides, eight chalcogen bromides, and six chalcogen iodides that ... Such compounds tend to feature sulfur as the chalcogen. There are also chalcogen borides with two, three, or four chalcogens. ... Almost all chalcogen pnictide salts are typically in the form of [PnxE4x]3−, where Pn is a pnictogen and E is a chalcogen.[ ... Chalcogens also form compounds with halogens known as chalcohalides. Such compounds are known as chalcogen halides.[dubious - ...
The chalcogens are the elements of group 16 of the Periodic Table. These include oxygen (O), sulfur (S), selenium (Se), ... Chalcogens such as the poloniums can occur as native polonium due to diffusion of radon gas with subsequent radioactive decay ... Chalcogen minerals · Clear ices · Coals · Cratering · Crystallography · Dendrochronology · Distances · Dominant group/ ... Chalcogen minerals/Quiz · Clear ices/Quiz · Coals/Quiz · Cratering/Quiz · Crystallography/Quiz · Distances/Quiz · Economic ...
chalcogen hydride (CHEBI:36902) is a chalcogen molecular entity (CHEBI:33304). chalcogen oxoacid (CHEBI:33484) is a chalcogen ... chalcogen molecular entity (CHEBI:33304) has part chalcogen (CHEBI:33303) chalcogen molecular entity (CHEBI:33304) is a p-block ... chalcogen oxoanion (CHEBI:33485) is a chalcogen molecular entity (CHEBI:33304). organochalcogen compound (CHEBI:36962) is a ... chalcogen molecular entity (CHEBI:33304). oxygen molecular entity (CHEBI:25806) is a chalcogen molecular entity (CHEBI:33304). ...
... chalcogen bonding can occur between two chalcogens, resulting in a chalcogen-chalcogen bond. Non-covalent interactions are well ... chalcogen-chalcogen bonding will be favored. It is hypothesized that electrostatic forces should only dominate in a chalcogen- ... "Theoretical Investigations on Heteronuclear ChalcogenChalcogen Interactions: On the Nature of Weak Bonds between Chalcogen ... Chalcogen bonding is a result of the same interaction. However, it is possible for chalcogens to for multiple sigma bonds and ...
... on the chemistry of the chalcogen group elements (S, Se and Te). While up to a few decades ago, chalcogen chemistry was mainly ... This book is organised into two parts, the first of which deals systematically with the chemistry of chalcogens in relation to ... The second part reflects the interdisciplinary nature of chalcogen chemistry and focuses on biological, materials and ... The Handbook of Chalcogen Chemistry: New Perspectives in Sulfur, Selenium and Tellurium provides an overview of recent ...
Mixed chalcogen-donor acenaphthene ligands L1-L3 [Acenap(EPh)(EPh)] (Acenap = acenaphthene-5,6-diyl; E/E = S, Se, Te) were ... Mixed chalcogen-donor acenaphthene ligands L1-L3 [Acenap(EPh)(EPh)] (Acenap = acenaphthene-5,6-diyl; E/E = S, Se, Te) were ... Investigating Silver Coordination to Mixed Chalcogen Ligands. Fergus R. Knight, Rebecca A. M. Randall, Lucy Wakefield, ... Keywords: silver(I) complexes; chalcogen-donor; coordination networks; helical chain polymer; acenaphthene ligands silver(I) ...
Amorphous thin film materials with different compositions of Se80−xTe20Snx(0 ≤ x ≤ 10) system have been deposited on glass substrates by a well known thermal evaporation technique. Structural...
... array including chalcogen-based semiconductor elements that can generate and store an electric signal f ... Also, chalcogen materials sensitively reacting to X-rays are used, and thus, it is possible to increase the preciseness of the ... The chalcogen material in the active layer may include Ge2Sb2Te5 (GST) or CuInSe2 (CIS). ... The chalcogen material in the active layer may include Ge2Sb2Te5 (GST) or CuInSe2 (CIS). ...
Sulfur (S8 - octatomic) is a brittle nonmetal. At room temperature, sulfur is a soft, bright-yellow solid with only a faint odor, similar to that of matches (the strong smell of sulfur usually refers to the odor of hydrogen sulfide (H2S) Its commercial uses are primarily in fertilizers, but it is also widely used in black gunpowder, matches, insecticides and fungicides.. Barking Dog Reaction. 4CS2 + 8N2O --, S8 + 4CO2 + 8N2 + ...
In this study, we treated leptin-deficient ob/ob mice with organo-chalcogen Zn complexes, and evaluated the resulting anti- ... Recently, we demonstrated that organo-chalcogen (sulfur and selenium) Zn complexes elicit strong anti-diabetic effects. ... In this study, we treated leptin-deficient ob/ob mice with organo-chalcogen Zn complexes, and evaluated the resulting anti- ... Nishiguchi T, Yoshikawa Y, Yasui H. Anti-Diabetic Effect of Organo-Chalcogen (Sulfur and Selenium) Zinc Complexes with Hydroxy- ...
In the first part, the preparation and properties of chalcogen-containing vitamin E analogues are described. The sulfur ... were independent of the chalcogen (0.49-0.52 V vs NHE). The O-H bond dissociation enthalpies for the compounds were also ...
... carbon and chalcogen > Additional nitrogen containing hetero ring attached directly or indirectly to the seven-membered hetero ... Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., o,s,se or te) or nitrogen as the only ring ...
Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., o,s,se or te) or nitrogen as the only ring ...
A special focus was on the chalcogen and moderately volatile elements sulfur, selenium and tellurium. The first chapter of this ... chalcogen elements, volatile elements, sulfur, selenium, tellurium, isotope dilution, femtosecond laser ablation ICP-MS, ... Funk, Claudia (2015) Abundances and distribution of chalcogen volatile elements in chondritic meteorites and their components. ... Abundances and distribution of chalcogen volatile elements in chondritic meteorites and their components. ...
Synthesis and Characterization of Mixed Chalcogen Triangular Complexes with New Mo-3(mu(3)-S)(mu(2)-Se-2)(3)(4+) and M-3(mu(3)- ... In our pursuit of mixed chalcogen-bridged cluster complexes, solids of the compositions Mo3SSe6Br4 and W3SSe6Br4 were prepared ...
How about adding detection of protein-ligand chalcogen bonding in the docking results? There is a lot of interest in Ch (S, Se ... Discovering protein-ligand chalcogen bonding in the protein data bank using endocyclic sulfur-containing heterocycles as ligand ...
Group 6 transition metal carbonyl complexes with chalcogen-bridged diarsenic(III) ligands. / Doerrer, L H; Green, J C; Green, M ... Group 6 transition metal carbonyl complexes with chalcogen-bridged diarsenic(III) ligands. Journal of the Chemical Society- ... title = "Group 6 transition metal carbonyl complexes with chalcogen-bridged diarsenic(III) ligands", ... T1 - Group 6 transition metal carbonyl complexes with chalcogen-bridged diarsenic(III) ligands ...
The chalcogens are the elements of group 16 of the Periodic Table. These include oxygen (O), sulfur (S), selenium (Se), ...
The name chalcogen is generally considered to mean "ore former" from the Greek chalcos "ore" and -gen "formation." [1] ... The chalcogens (with the "ch" pronounced with a hard "c" as in "chemistry") are the name for the periodic table Group 16 ( ... Unless grouped with a heavier chalcogen, oxides are not considered chalcogenides.. Properties. This group has six valence ... The compounds of the heavier chalcogens (particularly the sulfides, selenides, and tellurides) are collectively known as ...
Chalcogen bonded directly to pyrimidine at 2-position Subclass of:. 514 - Drug, bio-affecting and body treating compositions. ... 514183000 - Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., O,S,Se or Te) or nitrogen as the ... 514269000 - Pyrimidines with chalcogen bonded directly to a ring carbon of said pyrimidine moiety Patent class list (only not ... Patent applications in class Chalcogen bonded directly to pyrimidine at 2-position ...
Wherein X Is Chalcogen, Bonded Directly To Ring Nitrogen Of The Five-membered Hetero Ring (e.g., Indomethacin, Etc.) Patents ... Having -c(=x)-, Wherein X Is Chalcogen, Bonded Directly To Ring Nitrogen Of The Five-membered Hetero Ring (e.g., Indomethacin, ... Wherein X Is Chalcogen, Attached Indirectly To Ring Carbon Of The Five-membered Hetero Ring By An Acyclic Carbon Or Acyclic ... Heterocyclic Carbon Compounds Containing A Hetero Ring Having Chalcogen (i.e., Oxygen, Sulfur, Selenium, Or Tellurium) Or ...
group 16 (chalcogens). Period. period 6 Block. p-block Element category. Post-transition metal, but this status is disputed. ...
Highly strained heterocycles constructed from Boron-Boron multiple bonds and heavy chalcogens ... such reactivity is not known between alkenes and the heavy chalcogens. While carbon is too electronegative to facilitate the ... Highly strained heterocycles constructed from Boron-Boron multiple bonds and heavy chalcogens. Angewandte Chemie International ...
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  • A chalcogen bond is an attractive interaction in the family of σ-hole interactions, along with hydrogen bonds and halogen bonds. (wikipedia.org)
  • This family of attractive interactions has been modeled as an electron donor interacting with the σ* orbital of a C-X bond (X= hydrogen, halogen, chalcogen, pnictogen, etc. (wikipedia.org)
  • Any electron donor can donate electrons into the σ-hole of a bonded chalcogen, including halogen anions, amines, and π electrons (such as benzene). (wikipedia.org)
  • Similar to halogen bonding, chalcogen bonding can occur between two chalcogens, resulting in a chalcogen-chalcogen bond. (wikipedia.org)
  • The BCP's between S and Cl− in these molecules are evidence of the non-covalent interactions, in this case chalcogen-halogen bonds. (wikipedia.org)
  • The aim of this discussion meeting is to bring together scientists working in the fields of halogen bonding, chalcogen bonding, pnicogen bonding, and tetrel bonding, to develop fundamental understanding of key aspects of non-covalent interactions in solid-state materials, in solution chemistry, in biochemistry, and in the gas phase. (rsc.org)
  • The middle chalcogens (selenium and tellurium) have similar decay tendencies as the lighter chalcogens, but their isotopes do not undergo proton emission and some of the most neutron-starved isotopes of tellurium undergo alpha decay. (wikipedia.org)
  • In this study, we treated leptin-deficient ob/ob mice with organo-chalcogen Zn complexes, and evaluated the resulting anti-diabetic effects in a mouse model of diabetes arising from pathogenic mechanisms different from those in KKA y mice. (mdpi.com)
  • The chemically uncharacterized synthetic element livermorium (Lv) is predicted to be a chalcogen as well. (wikipedia.org)
  • If the bonding interaction is weak enough to fall below the threshold of electron density, instead showing the interaction as ionic in nature, one can still resolve the nature of a chalcogen bond through comparison with the parent system. (wikipedia.org)
  • Given the dual ability of chalcogens to serve as donor and acceptor molecules for σ-hole interactions, a geometric schematic has been generated to distinguish between the differing bonding character. (wikipedia.org)
  • All of the chalcogens have six valence electrons , leaving them two electrons short of a full outer shell. (wikipedia.org)
  • All chalcogens have six valence electrons . (wikipedia.org)
  • All of the chalcogens have some role in biological functions, either as a nutrient or a toxin. (wikipedia.org)
  • Provided is an electro-medical imaging apparatus manufactured using a thin film transistor (TFT) array including chalcogen-based semiconductor elements that can generate and store an electric signal from an X-ray signal so as to be able to replace a traditional film type X-ray reader. (freepatentsonline.com)
  • 10. Oxygen is a part of a class of highly electronegative elements known as chalcogens. (smore.com)
  • As the first chalcogen, oxygen is one of the most electronegative elements in the world, bested only by fluorine. (smore.com)
  • Chalcogen bonding is comparable to other forms of σ-hole interactions. (wikipedia.org)
  • This session will focus on other sigma-hole interactions including e.g., chalcogen bonding, pnicogen bonding, and tetrel bonding. (rsc.org)
  • Another method used to evaluate chalcogen bonding specifically and a wide range of bonding generally is natural bond orbital (NBO) analysis. (wikipedia.org)
  • The chalcogen bond will be evaluated based on the natural population of the n → σ* orbital. (wikipedia.org)
  • Weak chalcogen bonding can be indicated in ELF analysis through charge transfer determination from the donor to accepter molecule and in a weakening of the σ bond which gives rise to the σ* orbital. (wikipedia.org)
  • Below is an example of just such a case in which a chalcogen bond is determined to exist between chloride and S(CN)2 by other means, but is not clear by ELF visualization. (wikipedia.org)
  • All of the solid, stable chalcogens are soft and do not conduct heat well. (wikipedia.org)
  • All of the solid, stable chalcogens are soft and do not conduct heat well. (wikipedia.org)
  • In addition to the stable isotopes, some radioactive chalcogen isotopes occur in nature, either because they are decay products, such as 210Po, because they are primordial, such as 82Se, because of cosmic ray spallation, or via nuclear fission of uranium. (wikipedia.org)
  • Chalcogen bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system (e.g., hecogenin, etc. (patentec.com)
  • The word "chalcogen" is derived from a combination of the Greek word khalkόs (χαλκός) principally meaning copper (the term was also used for bronze / brass , any metal in the poetic sense, ore or coin ), and the Latinised Greek word genēs , meaning born or produced . (wikipedia.org)