Define water witching. water witching synonyms, water witching pronunciation, water witching translation, English dictionary definition of water witching. n. the search for or discovery of underground water sources by means of a divining rod. Random House Kernerman Websters College Dictionary, © 2010 K...

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: | | | Chalcogens | | | | | ... World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most definitive collection ever assembled.

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 ...

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Search for The Other Ring Nitrogen Has A Substituent Which Includes Chalcogen Single Bonded To Acyclic Carbon Patents and Patent Applications (Class 544/394) Filed with the USPTO

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: ...

by Connect Team , May 4, 2020 , Breast Feeding, Help. Increased Fussiness - The Witching Hour Does your baby always seem to get upset at the same time of night? Does it seem like nothing you do during that time helps? Your baby may be experiencing the dreaded witching hour. The witching hour is a time when an ...

The Group II-IV nitride semiconductors are emerging as promising alternatives to III-nitrides in ultraviolet LED applications. These materials have wurtzite-derived orthorhombic crystal structures and can be obtained by substituting pairs of Group III atoms in a III-nitride for a single Group II atom and a single Group IV atom. Here we will focus on MgSiN$_{2}$, which is the equivalent II-IV nitride to wurtzite AlN. A detailed comparison of the properties obtained by first principles calculations and experiment of these two systems will be performed. It will be shown that MgSiN$_{2}$ has a large indirect band gap of similar size to the direct band gap of AlN, while having a crystal size which is intermediate between AlN and GaN.\footnote{J. B. Quirk, M. R{\aa}sander, C. M. McGilvery, R. Palgrave and M. A. Moram, Appl. Phys. Lett. 105, 112108 (2014), M. R{\aa}sander and M. A. Moram, Mater. Res. Express 3, 85902 (2016). } MgSiN$_{2}$ should therefore facilitate better lattice matching during film ...

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

An atom is the smallest part of an element that can exist. Get a quick overview of Chemical Properties of Group 15 Elements-I from Chemical Properties of Elements of Group 13,14, and 15 Elements and Group 15 Elements - Trends in Chemical Properties in just 3 minutes. Unlike other groups, noble gasses are unreactive and have very low electronegativity or electron affinity. Group 17 elements exist as diatomic molecules (X 2) when not combined with other elements. Group 15: pnictogens (not an IUPAC approved name) Group 16: chalcogens; Group 17: halogens; Group 18: noble gases; In addition, groups may be idenitifed by the first element in each group - so the Group 16 set of elements is sometimes called the oxygen group. Learn more about groups in this article. Collectively the elements of group 15 are called - asked Apr 7, 2018 in Chemistry by shabnam praween (137k points) the p block elements; 0 votes. asked Apr 7, 2018 in Chemistry by shabnam praween (137k points) Collectively the elements of ...

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 ...

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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TY - JOUR. T1 - Band gap closure and metallization of molecular solid hydrogen. AU - Garcia, A.. AU - Garcia, A.. AU - Barbee, T. W.. AU - Cohen, M. L.. AU - Silvera, I. F.. PY - 1990/10/15. Y1 - 1990/10/15. N2 - We present electronic-structure calculations for molecular solid hydrogen with emphasis on the study of the metallization via band overlap. Both orientationally ordered and randomly oriented molecules in h.c.p. arrangements are considered. It is found that orientational order favors a smaller band gap and thus metallization. This result is consistent with the observed discontinuity in the vibron frequency if it is assumed that an order-disorder transition occurs simultaneously with metallization.. AB - We present electronic-structure calculations for molecular solid hydrogen with emphasis on the study of the metallization via band overlap. Both orientationally ordered and randomly oriented molecules in h.c.p. arrangements are considered. It is found that orientational order favors a ...

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/ ...

Heidi Heckelbeck displays her witching skills in this second book of a new young chapter book series! Now readers between the ages of five and seven can read...

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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 ...

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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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 ...

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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 hexagonal Co2Mo3O8 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. Also known as: Dicobalt trimolybdenum(IV) oxide, Dicobalt octaoxotrimolybdate(IV).

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 ...

The chalcogens are the elements in column 16 (or group VI A in the old notation) of the periodic table of elements :oxygen, sulphur, selenium, tellurium and polonium. Their outer shell has a...

In asking this question - Why do chalcogens (Group VI) stink so badly? - I received a couple answers and comments along the lines of its not quite so simple. The same would generally apply here; there isnt one change in behavior, or even a finite set of behavioral changes, that could be predicted by an oxygen-to-sulfur exchange.. Just as a basic example, compare methanol ($\ce{CH_3(OH)}$) to methyl mercaptan, ($\ce{CH_3(SH)}$). Methanol is a colorless liquid at RT with a sweetish odor. Methyl mercaptan, with a higher molecular mass due to the sulfur switch, is nevertheless a gas at RT and smells like rotting cabbage. Methanol metabolizes into formic acid and formaldehyde which in sufficient doses causes nerve damage, specifically to the optic nerve. Methyl mercaptan is pretty much its own metabolite; while also toxic in sufficient doses, its readily filtered out by the liver and kidneys, as its produced by bacterial breakdown of many of the foods we eat (especially highly-fibrous ...

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.

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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 ...

Half-metals are rather unusual and promising materials. The Fermi surface of a half-metal is completely spin-polarized. Namely, electronic states with only one spin projection value reach the Fermi energy. States with the other spin projection are pushed away from the Fermi level. This makes half-metals useful for spintronics. Typically, half-metallicity arises in strongly correlated electron systems, or when localized magnetic moments are present. Here, we demonstrate that doping a density-wave insulator even in the weak-coupling limit may stabilize new types of half-metallic states, such as spin-valley half-metal and charge-density wave (CDW) half-metal [1]. Our analysis is based on a simple model Hamiltonia describing charge carriers belonging to two bands: electron band $a$ and hole band $b$. Both bands have the parabolic dispersion law and spherical Fermi surface pockets (or valleys). When the Fermi surface valleys nest well (that is, the Fermi momentum of electrons $a$ equals to the Fermi ...

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

This pattern advised to Dalton that each chemical element combines with others by some fundamental and constant unit of mass. The basic concept that matter is made up of tiny indivisible particles is very old, showing in many historical cultures such as Greece and India. This historic idea was based mostly in philosophical reasoning rather than scientific reasoning. The word atom is derived from the Greek word atomos, which means uncuttable. This perspective additionally carries a narrative for the tip of our life.. The deformation is determined by the sector magnitude and the orbital sort of outer shell electrons, as shown by group-theoretical issues. Aspherical deviations might be elicited for example in crystals, the place large crystal-electrical fields might occur at low-symmetry lattice websites. Significant ellipsoidal deformations have been proven to occur for sulfur ions and chalcogen ions in pyrite-kind compounds. This deficit is a part of the binding power of the brand new nucleus, ...

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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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. ...

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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 ...

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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. ...

New Monocyclopentadienyl Complexes of Tantalum with Dithiolate Ligands. Crystal and Molecular Structures of Cp*TaCl2(SCH2CH2)2S, Cp*TaMe2(SCH2CH2)2O, Cp*TaMe2(SCH2CH2)2S, and Cp*Ta(xylylNC(Me)2CNxylyl)(SCH2CH2)2O (Cp* = η5-C5Me5)

Benzo[1,2-b:6,5-b]dithiophene-4,5-dione (BDTD) is used as an intermediate to synthesise acceptor unit for organic solar cell. But it has dual activity of both dono..