Inorganic or organic compounds that contain boron as an integral part of the molecule.
Inorganic and organic derivatives of boric acid either B(OH)3 or, preferably H3BO3.
A technique for the treatment of neoplasms, especially gliomas and melanomas in which boron-10, an isotope, is introduced into the target cells followed by irradiation with thermal neutrons.
A trace element with the atomic symbol B, atomic number 5, and atomic weight [10.806; 10.821]. Boron-10, an isotope of boron, is used as a neutron absorber in BORON NEUTRON CAPTURE THERAPY.
The collective name for the boron hydrides, which are analogous to the alkanes and silanes. Numerous boranes are known. Some have high calorific values and are used in high-energy fuels. (From Grant & Hackh's Chemical Dictionary, 5th ed)
Inorganic or organic salts and esters of boric acid.
A class of inorganic or organic compounds that contain the borohydride (BH4-) anion.
A technique for the treatment of neoplasms in which an isotope is introduced into target cells followed by irradiation with thermal neutrons.
Atomic species differing in mass number but having the same atomic number. (Grant & Hackh's Chemical Dictionary, 5th ed)
Electrically neutral elementary particles found in all atomic nuclei except light hydrogen; the mass is equal to that of the proton and electron combined and they are unstable when isolated from the nucleus, undergoing beta decay. Slow, thermal, epithermal, and fast neutrons refer to the energy levels with which the neutrons are ejected from heavier nuclei during their decay.
Compounds containing the -SH radical.
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.

Receptor-mediated targeting of fluorescent probes in living cells. (1/933)

A strategy was developed to label specified sites in living cells with a wide selection of fluorescent or other probes and applied to study pH regulation in Golgi. cDNA transfection was used to target a single-chain antibody to a specified site such as an organelle lumen. The targeted antibody functioned as a high affinity receptor to trap cell-permeable hapten-fluorophore conjugates. Synthesized conjugates of a hapten (4-ethoxymethylene-2-phenyl-2-oxazolin-5-one, phOx) and fluorescent probes (Bodipy Fl, tetramethylrhodamine, fluorescein) were bound with high affinity (approximately 5 nM) and specific localization to the single-chain antibody expressed in the endoplasmic reticulum, Golgi, and plasma membrane of living Chinese hamster ovary cells. Using the pH-sensitive phOx-fluorescein conjugate and ratio imaging microscopy, pH was measured in the lumen of Golgi (pH 6.25 +/- 0.06). Measurements of pH-dependent vacuolar H+/ATPase pump activity and H+ leak in Golgi provided direct evidence that resting Golgi pH is determined by balanced leak-pump kinetics rather than the inability of the H+/ATPase to pump against an electrochemical gradient. Like expression of the green fluorescent protein, the receptor-mediated fluorophore targeting approach permits specific intracellular fluorescence labeling. A significant advantage of the new approach is the ability to target chemical probes with custom-designed spectral and indicator properties.  (+info)

Endocytic sorting of lipid analogues differing solely in the chemistry of their hydrophobic tails. (2/933)

To understand the mechanisms for endocytic sorting of lipids, we investigated the trafficking of three lipid-mimetic dialkylindocarbocyanine (DiI) derivatives, DiIC16(3) (1,1'-dihexadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate), DiIC12(3) (1,1'- didodecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate), and FAST DiI (1,1'-dilinoleyl-3,3,3', 3'-tetramethylindocarbocyanine perchlorate), in CHO cells by quantitative fluorescence microscopy. All three DiIs have the same head group, but differ in their alkyl tail length or unsaturation; these differences are expected to affect their distribution in membrane domains of varying fluidity or curvature. All three DiIs initially enter sorting endosomes containing endocytosed transferrin. DiIC16(3), with two long 16-carbon saturated tails is then delivered to late endosomes, whereas FAST DiI, with two cis double bonds in each tail, and DiIC12(3), with saturated but shorter (12-carbon) tails, are mainly found in the endocytic recycling compartment. We also find that DiOC16(3) (3,3'- dihexadecyloxacarbocyanine perchlorate) and FAST DiO (3, 3'-dilinoleyloxacarbocyanine perchlorate) behave similarly to their DiI counterparts. Furthermore, whereas a phosphatidylcholine analogue with a BODIPY (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) fluorophore attached at the end of a 5-carbon acyl chain is delivered efficiently to the endocytic recycling compartment, a significant fraction of another derivative with BODIPY attached to a 12-carbon acyl chain entered late endosomes. Our results thus suggest that endocytic organelles can sort membrane components efficiently based on their preference for association with domains of varying characteristics.  (+info)

Orientation of the pore-forming peptide GALA in POPC vesicles determined by a BODIPY-avidin/biotin binding assay. (3/933)

We determined the orientation of a biotinylated version of the pore-forming peptide GALA (WEAALAEALAEALAEHLAEALAEALEALAA) at pH 5.0 in large unilamellar phosphatidylcholine vesicles, using the enhancement of BODIPY-avidin fluorescence subsequent to its irreversible binding to a biotin moiety. GALA and its variants were biotinylated at the N- or C-terminus. BODIPY-avidin was either added externally or was pre-encapsulated in vesicles to assess the fraction of liposome-bound biotinylated GALA that exposed its labeled terminus to the external or internal side of the bilayer, respectively. Under conditions where most of the membrane-bound peptides were involved in transmembrane aggregates and formed aqueous pores (at a lipid/bound peptide molar ratio of 2500/1), the head-to-tail (N- to C-terminus) orientation of the membrane-inserted peptides was such that 3/4 of the peptides exposed their N-terminus on the inside of the vesicle and their C-terminus on the outside. Under conditions resulting in reduced pore formation (at higher lipid/peptide molar ratios), we observed an increase in the fraction of GALA termini exposed to the outside of the vesicle. These results are consistent with a model (Parente et al., Biochemistry, 29:8720, 1990) that requires a critical number of peptides (M) in an aggregate to form a transbilayer structure. When the peptides form an aggregate of size i, with i < M = 4 to 6, the orientation of the peptides is mostly parallel to the membrane surface, such that both termini of the biotinylated peptide are exposed to external BODIPY-avidin. This BODIPY-avidin/biotin binding assay should be useful to determine the orientation of other membrane-interacting molecules.  (+info)

Synthesis of 5-substituted 2'-deoxycytidine 5'-(alpha-P-borano)triphosphates, their incorporationinto DNA and effects on exonuclease. (4/933)

Direct PCR sequencing with boronated nucleotides provides an alternative to current PCR sequencing methods. The positions of boranophosphate-modified nucleotides incorporated randomly into DNA during PCR can be revealed directly by exonuclease digestion to give sequencing ladders. Cytosine nucleotides, however, are especially sensitive to exonuclease digestion and provide suboptimal sequencing ladders. Therefore, a series of 5-substituted analogs of 2'-deoxycytidine 5'-(alpha-P-borano)triphosphates (dCTPalphaB) were synthesized with the hope of increasing the nuclease resistance of deoxycytosine residues and thereby enhancing the deoxycytosine band intensities. These dCTP analogs contain a boranophosphate modification at the alpha-phosphate group in 2'-deoxycytidine 5'-triphosphate (dCTP) as well as a 5-methyl, 5-ethyl, 5-bromo or 5-iodo substitution for the 5-hydrogen of cytosine. The two diastereomers of each new dCTP derivative were separated by reverse phase HPLC. The first eluted diastereomer (putatively Rp) of each dCTP analog was a substrate for T7 DNA polymerase (Sequenase) and had an incorporation efficiency similar to normal dCTP and dCTPalphaB, with the 5-iodo-dCTPalphaB analog being the least efficient. Substitution at the C-5 position of cytosine by alkyl groups (ethyl and methyl) markedly enhanced the dCTPalphaB resistance towards exonuclease III (5-Et-dCTPalphaB >5-Me-dCTPalphaB >dCTPalphaB approximately 5-Br-dCTPalphaB >5-I-dCTPalphaB), thereby generating DNA sequences that better define the deoxycytosine positions. The introduction of modified dCTPalphaB should increase the utility of direct DNA sequencing with boronated nucleoside 5'-triphosphates.  (+info)

Tamoxifen inhibits acidification in cells independent of the estrogen receptor. (5/933)

Tamoxifen has been reported to have numerous physiological effects that are independent of the estrogen receptor, including sensitization of resistant tumor cells to many chemotherapeutic agents. Drug-resistant cells sequester weak base chemotherapeutics in acidic organelles away from their sites of action in the cytosol and nucleus. This work reports that tamoxifen causes redistribution of weak base chemotherapeutics from acidic organelles to the nucleus in drug-resistant cells. Agents that disrupt organelle acidification (e.g., monensin, bafilomycin A1) cause a similar redistribution. Measurement of cellular pH in several cell lines reveals that tamoxifen inhibits acidification of endosomes and lysosomes without affecting cytoplasmic pH. Similar to monensin, tamoxifen decreased the rate of vesicular transport though the recycling and secretory pathways. Organellar acidification is required for many cellular functions, and its disruption could account for many of the side effects of tamoxifen.  (+info)

BOCILLIN FL, a sensitive and commercially available reagent for detection of penicillin-binding proteins. (6/933)

We describe a new, sensitive, rapid, and nonradioactive method involving the use of the commercially available BOCILLIN FL, a fluorescent penicillin, as a labeling reagent for the detection and study of penicillin-binding proteins (PBPs). This method allowed rapid detection of 30 ng of a purified PBP protein under UV light and of 2 to 4 ng of the protein with the aid of a FluorImager. This method also allowed rapid determination of the PBP profiles of Escherichia coli, Pseudomonas aeruginosa, and Streptococcus pneumoniae. The PBP profiles obtained are virtually identical to those reported previously with 3H-, 14C-, or 125I-labeled penicillin. Using this method enabled us to determine the 50% inhibitory concentrations of the penicillin-sensitive and -resistant PBP2x proteins of S. pneumoniae for penicillin G, thereby allowing a direct evaluation of their relative affinities for penicillin G. Finally, this method also allowed us to compare relative affinities of a PBP2x protein for different beta-lactam antibiotics with the aid of fluorescence polarization technology and to monitor a PBP2x protein during purification.  (+info)

cAMP-dependent mobilization of intracellular Ca2+ stores by activation of ryanodine receptors in pancreatic beta-cells. A Ca2+ signaling system stimulated by the insulinotropic hormone glucagon-like peptide-1-(7-37). (7/933)

Glucagon-like peptide-1 (GLP-1) is an intestinally derived insulinotropic hormone currently under investigation for use as a novel therapeutic agent in the treatment of type 2 diabetes mellitus. In vitro studies of pancreatic islets of Langerhans demonstrated that GLP-1 interacts with specific beta-cell G protein-coupled receptors, thereby facilitating insulin exocytosis by raising intracellular levels of cAMP and Ca2+. Here we report that the stimulatory influence of GLP-1 on Ca2+ signaling results, in part, from cAMP-dependent mobilization of ryanodine-sensitive Ca2+ stores. Studies of human, rat, and mouse beta-cells demonstrate that the binding of a fluorescent derivative of ryanodine (BODIPY FL-X ryanodine) to its receptors is specific, reversible, and of high affinity. Rat islets and BTC3 insulinoma cells are shown by reverse transcriptase polymerase chain reaction analyses to express mRNA corresponding to the type 2 isoform of ryanodine receptor-intracellular Ca2+ release channel (RYR2). Single-cell measurements of [Ca2+]i using primary cultures of rat and human beta-cells indicate that GLP-1 facilitates Ca2+-induced Ca2+ release (CICR), whereby mobilization of Ca2+ stores is triggered by influx of Ca2+ through L-type Ca2+ channels. In these cells, GLP-1 is shown to interact with metabolism of D-glucose to produce a fast transient increase of [Ca2+]i. This effect is reproduced by 8-Br-cAMP, but is blocked by a GLP-1 receptor antagonist (exendin-(9-39)), a cAMP antagonist ((Rp)-cAMPS), an L-type Ca2+ channel antagonist (nimodipine), an antagonist of the sarco(endo)plasmic reticulum Ca2+ ATPase (thapsigargin), or by ryanodine. Characterization of the CICR mechanism by voltage clamp analysis also demonstrates a stimulation of Ca2+ release by caffeine. These findings provide new support for a model of beta-cell signal transduction whereby GLP-1 promotes CICR by sensitizing intracellular Ca2+ release channels to the stimulatory influence of cytosolic Ca2+.  (+info)

Interaction of diphtheria toxin T domain with molten globule-like proteins and its implications for translocation. (8/933)

The transmembrane (T) domain of diphtheria toxin has a critical role in the low pH-induced translocation of the catalytic domain (A chain) of the toxin across membranes. Here it is shown that at low pH, addition of proteins in a partly unfolded, molten globule-like conformation converted the T domain from a shallow membrane-inserted form to its transmembrane form. Fluorescence energy transfer demonstrated that molten globule-like proteins bound to the T domain. Thus, the T domain recognizes proteins that are partly unfolded and may function in translocation of the A chain as a transmembrane chaperone.  (+info)

Boron compounds refer to chemical substances that contain the element boron (symbol: B) combined with one or more other elements. Boron is a naturally occurring, non-metallic element found in various minerals and ores. It is relatively rare, making up only about 0.001% of the Earth's crust by weight.

Boron compounds can take many forms, including salts, acids, and complex molecules. Some common boron compounds include:

* Boric acid (H3BO3) - a weak acid used as an antiseptic, preservative, and insecticide
* Sodium borate (Na2B4O7·10H2O) - also known as borax, a mineral used in detergents, cosmetics, and enamel glazes
* Boron carbide (B4C) - an extremely hard material used in abrasives, ceramics, and nuclear reactors
* Boron nitride (BN) - a compound with properties similar to graphite, used as a lubricant and heat shield

Boron compounds have a variety of uses in medicine, including as antiseptics, anti-inflammatory agents, and drugs for the treatment of cancer. For example, boron neutron capture therapy (BNCT) is an experimental form of radiation therapy that uses boron-containing compounds to selectively target and destroy cancer cells.

It's important to note that some boron compounds can be toxic or harmful if ingested, inhaled, or otherwise exposed to the body in large quantities. Therefore, they should be handled with care and used only under the guidance of a trained medical professional.

Boric acid is not a compound that is typically produced within the body as it is an inorganic, weak acid. It is commonly used as a preservative, antiseptic, and insecticide. Boric acid can be found in various over-the-counter products such as eye wash solutions, mouthwashes, and topical creams or ointments.

The medical definition of boric acids is:

A white crystalline powder with the chemical formula B(OH)3. It is slightly soluble in water and has a wide range of uses, including as an antiseptic, insecticide, and preservative. In medicine, boric acid is used as a mild antiseptic for minor cuts, scrapes, and burns, and to treat yeast infections of the skin. It works by killing bacteria and fungi that can cause infections. Boric acid is also used in some eye wash solutions to help prevent bacterial infections.

It's important to note that boric acid can be toxic if ingested or absorbed through the skin in large amounts, so it should be used with caution and kept out of reach of children and pets.

Boron Neutron Capture Therapy (BNCT) is a type of targeted radiation therapy used in the treatment of certain types of cancer. It involves the use of a boron-containing compound, which selectively accumulates in cancer cells. Once the compound has been taken up by the cancer cells, the patient is exposed to a beam of low-energy neutrons. When the neutrons interact with the boron-10 isotope within the compound, a nuclear reaction occurs, producing high-energy alpha particles that destroy the cancer cells.

The advantage of BNCT is that it allows for targeted delivery of radiation to cancer cells while minimizing exposure to healthy tissues. However, this type of therapy is still experimental and is only available in a limited number of medical centers worldwide. It has been studied most extensively in the treatment of brain tumors, head and neck cancers, and melanoma.

Boron is a chemical element with the symbol B and atomic number 5. It is a metalloid that is light-colored, hard, and highly resistant to corrosion. In its crystalline form, boron is nearly as hard as diamond.

In medicine, boron compounds have been studied for their potential therapeutic uses, particularly in the treatment of cancer. For example, boron neutron capture therapy (BNCT) is a type of radiation therapy that involves the use of boron-containing compounds to selectively deliver radiation to cancer cells.

Boron is also an essential micronutrient for plants and some animals, including humans. However, excessive exposure to boron can be toxic to humans and other organisms. Therefore, it is important to maintain appropriate levels of boron in the body and environment.

Boranes are a group of chemical compounds that contain only boron and hydrogen. The most well-known borane is BH3, also known as diborane. These compounds are highly reactive and have unusual structures, with the boron atoms bonded to each other in three-center, two-electron bonds. Boranes are used in research and industrial applications, including as reducing agents and catalysts. They are highly flammable and toxic, so they must be handled with care.

Borates are a group of minerals that contain boron, oxygen, and hydrogen in various combinations. They can also contain other elements such as sodium, calcium, or potassium. Borates have a wide range of uses, including as flame retardants, insecticides, and preservatives. In medicine, boric acid powder is sometimes used as a mild antiseptic to treat minor cuts, burns, and scrapes. However, it can be toxic if ingested or absorbed through the skin in large amounts, so it should be used with caution.

Borohydrides are a class of chemical compounds that contain boron and hydrogen ions (H-). The most common borohydride is sodium borohydride (NaBH4), which is a white, solid compound often used in chemistry as a reducing agent. Borohydrides are known for their ability to donate hydride ions (H:-) in chemical reactions, making them useful for reducing various organic and inorganic compounds. Other borohydrides include lithium borohydride (LiBH4), potassium borohydride (KBH4), and calcium borohydride (Ca(BH4)2).

Neutron Capture Therapy (NCT) is a type of radiation therapy used in the treatment of cancer. It involves the use of low-energy thermal neutrons to be absorbed by atomic nuclei, which then undergo a nuclear reaction. This reaction results in the emission of high-energy particles that can destroy nearby cancer cells.

In NCT, a patient is administered with a boron-containing compound, which selectively accumulates in cancer cells. When the patient is then exposed to a beam of low-energy neutrons, the boron atoms absorb the neutrons and undergo a nuclear reaction, producing high-energy alpha particles that destroy the cancer cells.

The advantage of NCT is its ability to deliver a high dose of radiation directly to cancer cells while minimizing damage to surrounding healthy tissue. However, NCT is still an experimental treatment and is not widely available outside of clinical trials.

Isotopes are variants of a chemical element that have the same number of protons in their atomic nucleus, but a different number of neutrons. This means they have different atomic masses, but share similar chemical properties. Some isotopes are stable and do not decay naturally, while others are unstable and radioactive, undergoing radioactive decay and emitting radiation in the process. These radioisotopes are often used in medical imaging and treatment procedures.

I'm sorry for any confusion, but neutrons are not a medical term. They are a fundamental particle in physics and chemistry. Neutrons are neutral particles found in the nucleus of an atom, alongside protons. Together, they make up the atomic nucleus, while electrons orbit around it.

Neutrons are not typically discussed in the context of medical definitions unless it's in relation to nuclear medicine, radiation therapy or other specialized medical fields that involve ionizing radiation and nuclear reactions. If you have any questions related to medical terminology, I would be happy to help!

Sulfhydryl compounds, also known as thiol compounds, are organic compounds that contain a functional group consisting of a sulfur atom bonded to a hydrogen atom (-SH). This functional group is also called a sulfhydryl group. Sulfhydryl compounds can be found in various biological systems and play important roles in maintaining the structure and function of proteins, enzymes, and other biomolecules. They can also act as antioxidants and help protect cells from damage caused by reactive oxygen species. Examples of sulfhydryl compounds include cysteine, glutathione, and coenzyme A.

Molecular structure, in the context of biochemistry and molecular biology, refers to the arrangement and organization of atoms and chemical bonds within a molecule. It describes the three-dimensional layout of the constituent elements, including their spatial relationships, bond lengths, and angles. Understanding molecular structure is crucial for elucidating the functions and reactivities of biological macromolecules such as proteins, nucleic acids, lipids, and carbohydrates. Various experimental techniques, like X-ray crystallography, nuclear magnetic resonance (NMR) spectroscopy, and cryo-electron microscopy (cryo-EM), are employed to determine molecular structures at atomic resolution, providing valuable insights into their biological roles and potential therapeutic targets.

... are compounds containing the element boron. In the most familiar compounds, boron has the formal oxidation ... Greim, Jochen & Schwetz, Karl A. (2005). "Boron Carbide, Boron Nitride, and Metal Borides". Boron Carbide, Boron Nitride, and ... In these compounds the oxidation state of boron is often not a whole number. The boron nitrides are notable for the variety of ... Boranes are chemical compounds of boron and hydrogen, with the generic formula of BxHy. These compounds do not occur in nature ...
"Fluoride Compounds: Overview". National Pollutant Inventory. Australian Government. "Boron trifluoride". WebBook. NIST. "Boron ... Boron compounds, Boron halides, Industrial gases, Acid catalysts). ... Boron trifluoride is the inorganic compound with the formula BF3. This pungent, colourless, and toxic gas forms white fumes in ... It is a useful Lewis acid and a versatile building block for other boron compounds. The geometry of a molecule of BF3 is ...
Nitrides, Boron compounds). ... Two dimensional hexagonal boron nitride (2D h-BN) is a material ... Molten boron oxide reacts with gaseous ammonia to form an ultrathin h-BN film at the reaction interface. The film grows to 20- ... When a source of boron and nitrogen, such as amorphous BN, is sandwiched between a Co or Ni film and SiO2, it is possible to ... Liquid precursors, such as borazine, have equal amounts of boron and nitrogen, and do not produce highly toxic side products. ...
The boranes (boron hydrogen compounds) and similar gaseous compounds are quite poisonous. As usual, boron is not an element ... Allotropes of boron Boron deficiency Boron oxide Boron nitride Boron neutron capture therapy Boronic acid Hydroboration- ... Boron is introduced into semiconductors as boron compounds, by ion implantation. Estimated global consumption of boron (almost ... Heterodiamond (also called BCN) is another diamond-like boron compound. Boron is added to boron steels at the level of a few ...
n B2Cl4 → BnCln + n BCl3 The compounds with formulas B8Cl8 and B9Cl9 are known to contain closed cages of boron atoms. Boron ... Boron trichloride is the inorganic compound with the formula BCl3. This colorless gas is a reagent in organic synthesis. It is ... ISBN 978-0-08-037941-8. Gerrard, W.; Lappert, M. F. (1958). "Reactions Of Boron Trichloride With Organic Compounds". Chemical ... Martin, D. R. (1944). "Coordination Compounds of Boron Trichloride. I. - A Review". Chemical Reviews. 34 (3): 461-473. doi: ...
... are boron-carbon compounds. α-tetragonal boron is a boron-rich isotropic boron carbide (B50C2). Borafullerenes ... Crystal structure of boron-rich metal borides Wiberg 2001, p. 930. Hoard, Hughes & Sands 1958. Hoard et al. 1970. Amberger 1981 ... ISBN 3-540-93448-0. Hoard, J. L.; Hughes, R. E.; Sands, D. E. (1958). "The Structure of Tetragonal Boron". Journal of the ... Amberger, E. (1981). "Elemental boron". In Buschbeck, K. C. (ed.). Gmelin handbook of inorganic and organometallic chemistry: B ...
10, p. 80 National Pollutant Inventory - Boron and compounds MSDS for Trimethyl Borate WebBook page for BC3H9O3 (CS1 maint: ... "Boron Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. M.A. Beckett, G.C. Strickland, J.R. ... Trimethyl borate is the organoboron compound with the formula B(OCH3)3. It is a colourless liquid that burns with a green flame ... It is a weak Lewis acid (AN = 23, Gutmann-Beckett method). Borate esters are prepared by heating boric acid or related boron ...
Robert Brotherton; Joseph Weber; Clarence Guibert & John Little (2000). "Boron Compounds". Ullmann's Encyclopedia of Industrial ... Because LiBF4 and other alkali-metal salts thermally decompose to evolve boron trifluoride, the salt is commonly used as a ... Lithium tetrafluoroborate is an inorganic compound with the formula LiBF4. It is a white crystalline powder. It has been ...
A diboryne in chemistry is a chemical compound containing a boron-boron triple bond. Such compounds are of fundamental ... "Ambient-Temperature Isolation of a Compound with a Boron-Boron Triple Bond". Science. 336 (6087): 1420-2. Bibcode:2012Sci... ... Diborene Zhou, M; Tsumori, N; Li, Z; Fan, K; Andrews, L; Xu, Q (2002). "OCBBCO: A neutral molecule with some boron-boron triple ...
Robert J. Brotherton; C. Joseph Weber; Clarence R. Guibert; John L. Little (2000). "Boron Compounds". Ullmann's Encyclopedia of ... doi: 10.1016/0032-3861(96)00323-0 National Pollutant Inventory - Boron and compounds WebBook page for BC6H15O3 (Articles with ... "A convenient NMR method for the measurement of Lewis acidity at boron centres: correlation of reaction rates of Lewis acid ...
... burning with an apple-green flame characteristic for boron compounds. Thus, it is typically handled and stored using air-free ... "Boron Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH. doi:10.1002/14356007.a04_309. ISBN 3527306730. " ... Triethylborane (TEB), also called triethylboron, is an organoborane (a compound with a B-C bond). It is a colorless pyrophoric ... As an initiator, it can replace some organotin compounds. It reacts with metal enolates, yielding enoxytriethylborates that can ...
Two-dimensional nanomaterials, Boron compounds, Boron-nitrogen compounds). ... Boron nitride sheets can be also exfoliated by ball milling, where shear forces are applied on the face of bulk boron nitride ... Monolayer boron nitride is not oxidized till 700 °C and can sustain up to 850 °C in air; bilayer and trilayer boron nitride ... Boron nitride nanosheet is a two-dimensional crystalline form of the hexagonal boron nitride (h-BN), which has a thickness of ...
2010). "Boron Cluster Compounds". Inorganic Syntheses. pp. 56-66. doi:10.1002/9780470651568.ch2. ISBN 978-0-470-65156-8. ... The dodecaborate(12) anion, [B12H12]2−, is a borane with an icosahedral arrangement of 12 boron atoms, with each boron atom ... The first boron atom is numbered 1, then the closest ring of five atoms around it is numbered anticlockwise from 2 to 6. The ... Neutron irradiation causes boron-10 to emit an alpha particle near the tumor. Longuet-Higgins, Hugh Christopher; Roberts, M. de ...
Boron-Hydrogen compounds. Longmans, Green and Company. pp. 456-472. Read, J (1824). An appeal to the medical profession, on the ... Boron-Hydrogen compounds, "22. The History of Carbon Monoxide". Longmans, Green and Company. p. 907. Harrington (1801). The ... "a compound formed by the union of carbonic acid with an earth, alkali, or metallic oxide [...] they are distinguished by the ...
"Boron and Compounds". National Pollutant Inventory. Australian Government. "Decaborane". Organic Chemistry Portal. "Boron ... This white crystalline compound is one of the principal boron hydride clusters, both as a reference structure and as a ... Each boron has one "radial" hydride, and four boron atoms near the open part of the cluster feature extra hydrides. In the ... In fusion research, the neutron-absorbing nature of boron has led to the use of these thin boron-rich films to "boronize" the ...
Icosahedral B12 compounds include α-rhombohedral boron (B13C2), β-rhombohedral boron (MeBx, 23≤x), α-tetragonal boron (B48B2C2 ... Metal atoms need to donate two electrons per boron polyhedron to form boron-rich metal borides. Thus, boron compounds are often ... Contrary to other boron-rich icosahedral compounds, the boron icosahedra from different layers are not directly bonded. The ... The bridging boron site is tetrahedrally coordinated by four boron atoms. Those atoms are another boron atom in the counter ...
This planar compound has idealized C2V molecular symmetry. The boron atom is sp2-hybridized and contains an empty p-orbital. ... ISBN 978-3-540-59182-5 Lappert, M. F. (1956). "Organic Compounds Of Boron". Chem. Rev. 56 (5): 959-1064. doi:10.1021/ ... 4, p. 68 Snyder, H. R.; Kuck, J. A.; Johnson, J. R. (1938). "Organoboron Compounds, and the Study of Reaction Mechanisms. ... Ainley, A. D.; Challenger, F. (1930). "Studies of the boron-carbon linkage. Part I. The oxidation and nitration of phenylboric ...
Broere, Daniël L. J.; Holland, Patrick L. (2018-02-23). "Boron compounds tackle dinitrogen". Science. 359 (6378): 871. Bibcode: ... The resulting dianion was subsequently oxidized to a neutral compound, and reduced using water. In rare cases, metals react ... Although nitrogen fixation is usually associated with transition metal complexes, a boron-based system has been described. One ...
Low-energy σ-donation orbitals from the base to boron are present in these compounds, and the π-interaction from boron's lone ... A similar species with a boron-boron single bond was also observed. The diborene has an incredibly short boron-boron bond ... Some borylenes such as boron monofluoride (BF) and boron monohydride (BH) the parent compound also known simply as borylene, ... A borylene is the boron analogue of a carbene. The general structure is R-B: with R an organic moiety and B a boron atom with ...
Nanotubes by composition, Boron compounds). ... Zhi, C. Y.; Bai, X. D.; Wang, E. G. (2004). "Boron carbonitride ... Luo, L; Mo, L; Tong, Z; Chen, Y (2009). "Facile Synthesis of Ternary Boron Carbonitride Nanotubes". Nanoscale Res Lett. 4 (8): ... They are composed of comparable amounts of boron, carbon and nitrogen atoms. First made in 1994, synthesis methods have ... The method was grow them on stainless steel by reacting boron, zinc oxide (ZnO), and ethanol in nitrogen and hydrogen at 1150 ° ...
doi:10.1002/zaac.19814821124 Brotherton, R. J.; Weber, C. J.; Guibert, C. R.; Little, J. L. "Boron Compounds". Ullmann's ... The acidity of fluoroboric acid is complicated by the fact that its name refers to a range of different compounds, e.g. [H( ... The term "fluoroboric acid" refers to a range of chemical compounds, depending on the solvent. The H+ in the simplified formula ... Pure H[BF4] has been described as a "nonexistent compound", as a sufficiently "naked" proton is expected to abstract a fluoride ...
Nitrates, Boron compounds, Borates, Anions). ... Tetranitratoborate is an anion composed of boron with four ... boron nitrate, B(NO3)3, which has resisted attempts to make it; if it exists, it is unstable above −78 °C. Other related ions ... aluminium instead of boron ([Al(NO3)4]−). Tetramethylammonium chloride reacts with BCl3 to make [N(CH3)4]+[BCl4]−. Then the ...
Ananthanarayanan, K.P.; Gielisse, P.J.; Choudry, A. (1974). "Boron Compounds for Thermal Neutron Detection". Nucl. Instrum. ... neutron detectors containing boron may alternately use boron trifluoride (BF3) enriched to 96% boron-10 (natural boron is 20% ... This is because in Boron lined, n reacts with Boron and hence produce ion pairs inside the layer. Hence charged particles ... These boron-based films are often grown upon n-type Si substrates, which can form a pn junction with the Si and, therefore, ...
Altschuller, Aubrey P. (4 October 1955). "Calculated Heats of Formation and Combustion of Boron Compounds (Boron, Hydrogen, ... Bell, R. P.; Emeléus, H. J. (1948). "The boron hydrides and related compounds". Quarterly Reviews, Chemical Society. 2 (2): 132 ... Trimethyldiborane has two methyl groups on one boron atom, and one methyl and a hydrogen on the second boron atom. A bridge of ... The chemistry of boron. Part VI. New preparative methods and decomposition studies relating to methyldiboranes". Journal of the ...
Bell, R. P.; Emeléus, H. J. (1948). "The Boron Hydrides and Related Compounds". Quarterly Reviews, Chemical Society. 2 (2): 132 ... Shore, S. G. (1975). "Nido and Arachno Boron Hydrides". In Muetterties, Earl L (ed.). Boron Hydride Chemistry. Academic Press. ... Adams, Roy M. (September 1959). "Organoboron Compounds" (PDF). Metal-Organic Compounds. Advances in Chemistry. Vol. 23. p. 92. ... The Chemistry of Boron. Part VI. New Preparative Methods and Decomposition Studies Relating to Methyldiboranes". Journal of the ...
Altschuller, Aubrey P. (4 October 1955). "Calculated Heats of Formation and Combustion of Boron Compounds (Boron, Hydrogen, ... Bell, R. P.; Emeléus, H. J. (1948). "The boron hydrides and related compounds". Quarterly Reviews, Chemical Society. 2 (2): 132 ... The chemistry of boron. Part VI. New preparative methods and decomposition studies relating to methyldiboranes". Journal of the ... 1,1-Dimethyldiborane is the organoboron compound with the formula (CH3)2B(μ-H)2BH2. A pair of related 1,2-dimethyldiboranes are ...
Boron-nitrogen compounds, Cluster chemistry, Boranes). ... Azaboranes can also refer to simpler compounds including ... P. Paetzold (1991). "New Perspectives in Boron-Nitrogen Chemistry-I" (PDF). Pure Appl. Chem. 63 (3): 345-350. doi:10.1351/ ...
"The Boron Hydrides and Related Compounds". Quarterly Reviews, Chemical Society. 2 (2): 132. doi:10.1039/QR9480200132.. The ... G. G. Graf (2005). "Tin, Tin Alloys, and Tin Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. ...
Brown, Charles A.; Muetterties, Earl L.; Rochow, Eugene G. Boron-nitrogen systems. III. Addition compounds of boron trifluoride ... Muetterties's work on boron hydride clusters led to the work on several polyhedral borane anions such as B12H122−. He was an ... He also edited books on boron chemistry and transition-metal hydrides and wrote reviews on complexes with unusual coordination ... In collaboration with William D. Phillips he exploited NMR for study of dynamic processes in inorganic fluoride compounds. ...
Allwohn, Jürgen; Pilz, Monika; Hunold, Ralf; Massa, Werner; Berndt, Armin (1990). "Compounds with a Boron-Carbon Triple Bond". ... a novel boron-sulfur double-bond compound". Tetrahedron Letters. 37 (29): 5145-5148. doi:10.1016/0040-4039(96)01039-8. Zigler, ... Although such compounds are not intrinsically unstable, they instead tend to polymerize. An example is the rapid polymerization ... "Boron−Pnictogen Multiple Bonds: Donor-Stabilized PB and AsB Bonds and a Hindered Iminoborane with a B−N Triple Bond". Inorganic ...
Boron compounds are compounds containing the element boron. In the most familiar compounds, boron has the formal oxidation ... Greim, Jochen & Schwetz, Karl A. (2005). "Boron Carbide, Boron Nitride, and Metal Borides". Boron Carbide, Boron Nitride, and ... In these compounds the oxidation state of boron is often not a whole number. The boron nitrides are notable for the variety of ... Boranes are chemical compounds of boron and hydrogen, with the generic formula of BxHy. These compounds do not occur in nature ...
Abstract: Boron carbon compounds have been shown to have feasible superconductivity. In our earlier paper [Zheng et al., Phys. ... Title: Prediction of superconductivity in metallic boron-carbon compounds from 0 to 100 GPa by high-throughput screening. ... Using the high-throughput screening method of zone-center electron-phonon interaction, we find that ternary compounds like ...
This contribution is devoted to the study of morphology and magnetic properties of sodium borosilicate glasses with different concentrations (15, 20, and 25 wt.%) of α Fe2O3 in an initial furnace charge. These glasses were ...
BNCT: Boron Compounds. Current Boron Agents: BPA and BSH. BPA:. In 1987, a Japanese dermatologist Dr. Mishima and his co- ... Synthesis and radiation dosimetry of 4-borono-2-[18F]fluoro-d,l-phenylalanine: A target compound for PET and boron neutron ... Optimizing Boron Neutron Capture Therapy (BNCT) to Treat Cancer: An Updated Review on the Latest Developments on Boron ... K. Hamase, S. Nagamori, Y. Kanai, Boronophenylalanine, a boron delivery agent for boron neutron capture therapy, is transported ...
Borverbindungen, Borane, Borate und Bor-Organyle aus dem eigenen Syntheselabor.
Boron Compound Administration. Farrin et al (2022) noted that the worldwide growing trend of obesity across all ages has ... Boron compound administration; a novel agent in weight management: A systematic review and meta-analysis of animal studies. J ... Boron compound, Sodium-glucose co-transporter 2 inhibitors (Dapagliflozin, Canagliflozin, Empagliflozin and Ertugliflozin, ... The boron compound administration was more effective in the borax form; and when the intervention duration was 4 weeks or less ...
A compound fertilizer with boron was granulated employing laboratory equipment. As a boron component, boric acid and sodium ... COMPOUND FERTILIZER WITH BORON Authors. * A. M. Sviklas Kaunas University of Technology ... The optimal conditions of a compound fertilizer with boron granulation were determined as 7% humidity of the raw materials′ ... Compound fertilizers of grade 14-18-18-6(S)-0,3(B) were obtained. The main physicochemical properties of the granulated ...
Risk factors for cardiovascular diseases may be noticeably improved by intake of boron-containing compounds. In particular, ... The Action Of Boron-Containing Compounds. 1. BCCs Facilitate CO2 Hydration. Boron compounds have been shown to stimulate the ... Boron-Containing Compounds Boric acid and borates are boron-containing inorganic compounds found in soils. Plants and bacteria ... Find out why Boron is the new lithium. *Read how Boron drives innovation in Decarbonization, Advanced Energy, Food Security, ...
With little evidence, boron has been consumed for menstrual cramps and boric acid has been used vaginally for yeast infections. ... Boron compound administration; a novel agent in weight management: a systematic review and meta- analysis of animal studies. J ... Boron deficiency. Taking boron by mouth treats and prevents boron deficiency.. Possibly effective for.... *Skin damage caused ... Boron may have antioxidant effects. People commonly use boron for boron deficiency and vaginal yeast infections. It is also ...
C07F5/05Cyclic compounds having at least one ring containing boron but no carbon in the ring ... Cyclic compounds having at least one ring containing boron but no carbon in the ring. ... CCHEMISTRY METALLURGY C07Organic chemistry C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN ... CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM C07F5/00Compounds containing elements of the 3rd ...
Boron Compounds / administration & dosage * Boron Compounds / adverse effects * Dexamethasone / administration & dosage * ...
Unusual chalcogen-boron ring compounds: the gas-phase structures of 1,4-B4S2(NMe2)4 and related molecules. / Wann, Derek A.; ... Unusual chalcogen-boron ring compounds: the gas-phase structures of 1,4-B4S2(NMe2)4 and related molecules. Dalton Transactions ... Unusual chalcogen-boron ring compounds: the gas-phase structures of 1,4-B4S2(NMe2)4 and related molecules. In: Dalton ... Unusual chalcogen-boron ring compounds: the gas-phase structures of 1,4-B4S2(NMe2)4 and related molecules. ...
... and boron oxide. Several companies in the United States produce most of the worlds borates by processing boron compounds. ... It is often found combined with other substances to form compounds called borates. Common borate compounds include boric acid, ... Boron is a compound that occurs in nature. ... Summary: Boron is a compound that occurs in nature. It is often ... and boron oxide. Several companies in the United States produce most of the worlds borates by processing boron compounds. ...
This WebElements periodic table page contains boron tribromide for the element boron ... The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the ... J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992. ...
This WebElements periodic table page contains uses for the element boron ... boron compounds show promise in treating arthritis. *10B is used as a control for nuclear reactors, as a shield for nuclear ... boron compounds are used in production of enamels for covering steel of refrigerators, washing machines, etc. ... boron compounds are extensively used in the manufacture of enamels and borosilicate glasses ...
Predicting two-dimensional boron-barbon compounds by the global optimization method. J. Am. Chem. Soc. 133, 16285-16290 (2011). ... Zhang, C. J., Sun, W. X. & Cao, Z. X. Zigzag boron-carbon nanotubes with quasi-planar tetracoordinate carbons. J. Am. Chem. Soc ... Pei, Y. & Zeng, X. C. Probing the planar tetra-, penta-, and hexacoordinate Carbon in carbon-boron mixed clusters. J. Am. Chem ... Especially, the tetrahedral preference of tetracoordinate carbon compounds, which was deduced by vant Hoff1 and Lebel2 more ...
Boron and its compounds 233-139-2. 215-575-5. 215-540-4. 215-125-8 10043-35-3. 1332-77-0. 1330-43-4. 1303-86-2 12/01/2024 ECHA ...
Herbert Charles . 1912-2004, US chemist, who worked on the compounds of boron. Nobel prize for chemistry 1979 ...
Boron typically combines with oxygen to form various boron compounds that can contaminate drinking water. Boron is an ... Boron. Boron was found in two brands, at 60 and 90 ppb (microgram/L) concentrations. Boron gets into drinking water from ... even though the Agency acknowledges that lifetime ingestion of boron and boron compounds can increase the health effect risk ... Summary Document from the Health Advisory for Boron and Compounds. Document Number 822-S-08-003. Available:www.epa.gov/ogwdw000 ...
Mining-industry; Mine-workers; Underground-mining; Worker-health; Occupational-health-programs; Mineral-dusts; Boron-compounds ... Four boron minerals facilities were surveyed and data collected concerning occupational health program and policy information; ... This report concerned occupational health data for boron minerals mining (SIC-1474) based on surveys during June and July of ...
With ThBHCl*SMe2; dihydrogen peroxide; In dichloromethane; at 25 ℃; for 6h; Other Boron compounds used.; ... Title compound not separated from byproducts; 1) THF, 65 deg C, 9 h (or 19 h), var. reag. in step: Cp2TiBH4 or BH3, or BH3 with ... Title compound not separated from byproducts; 1) THF, 65 deg C, 9 h; var. reag. in 1) step: Cp2TiBH4 or BH3, or BH3 with LiBH4 ... With borane N-ethyl-N-isopropylaniline complex; In tetrahydrofuran; for 24h; Title compound not separated from byproducts; ...
Tavaborole 0.5% topical solution, an oxaborole solution (boron-containing compound). * Can be used in WSO and DLSO limited to ... Chemical removal with a 40-50% urea compound in patients with very thick nails ... a novel boron-based molecule for the topical treatment of toenail onychomycosis. Presented at the American Academy of ...
Boron Compounds); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); 2U4T60A6YD (boron nitride); 2014/04/28 ... BTEX compounds are of particular interest, above all benzene because it is a carcinogenic compound for which guideline value in ... Boron nitride nanotube (BNNT) is a novel material that shows potential ability in capturing organic pollutants. In this study, ... Boron nitride nanotubes as novel sorbent for solid-phase microextraction of polycyclic aromatic hydrocarbons in environmental ...
Structural stability and electronic properties of carbon-boron nitride compounds p. 126 S. Azevedo and R. de Paiva ...
Boron compounds. Boron compounds with up to 5% copper for insect control and wood preeservation. Capsaicin. Cleansers. Corn ...
Firstly, the Boron Nitride (BN) thermal compound on one side of the CPU reduces thermal throttling during short gaming sessions ... The 3,300 milligrams of BN thermal compound transfers heat from the side of the CPU opposite the vapor chamber, dissipating the ... Test result provided by ASUS labs, compared to the CPU temperature of ROG Phone 6 without BN thermal compound. ...
Researchers find a workaround for creating chemical compounds that could prove useful for medical imaging and drug development. ... In this effort, they enlisted a boron-containing compound.. Unexpectedly, they found a mechanism by which the boron compound ... This fragment, they observed, can then bond with other chemical compounds and in a next step form a new CF3-containing compound ... compounds and attach them to other chemical compounds.. Their discovery could aid in the synthesis of new "radiotracers" - ...
Boron and its compounds. Tetraphenylphosphonium tetraphenylborate. 15525-15-2. 0.770000. 0.500000. 0.352389. ... Organic Silicon compounds. Other organic Silicon Compounds. 0.770000. 0.500000. 0.352389. Organic Silicon compounds. [3-(2,3- ... Calcium and its compounds. Calcium. 7440-70-2. 0.000008. 0.002000. 0.000004. Gold and its compounds. Gold, metal. 7440-57-5. ... Inorganic Silicon compounds. Silicon. 7440-21-3. 0.143597. 0.250300. 0.065717. Magnesium and its compounds. Magnesium, metal. ...
  • In the diamond-like structure, called cubic boron nitride (tradename Borazon), boron atoms exist in the tetrahedral structure of carbon atoms in diamond, but one in every four B-N bonds can be viewed as a coordinate covalent bond, wherein two electrons are donated by the nitrogen atom which acts as the Lewis base to a bond to the Lewis acidic boron(III) centre. (wikipedia.org)
  • Cubic boron nitride, among other applications, is used as an abrasive, as it has a hardness comparable with diamond (the two substances are able to produce scratches on each other). (wikipedia.org)
  • In the BN compound analogue of graphite, hexagonal boron nitride (h-BN), the positively charged boron and negatively charged nitrogen atoms in each plane lie adjacent to the oppositely charged atom in the next plane. (wikipedia.org)
  • boron nitride is as hard as diamond. (webelements.com)
  • Firstly, the Boron Nitride (BN) thermal compound on one side of the CPU reduces thermal throttling during short gaming sessions. (asus.com)
  • A proprietary ceramic formulation containing integral Boron Nitride compounds for low friction in dry and dusty conditions. (bicyclesnyc.com)
  • The toxicity of boron nitride nanotubes (BNNTs) has been the subject of conflicting reports, likely due to differences in the residuals and impurities that can make up to 30-60% of the material produced based on the manufacturing processes and purification employed. (cdc.gov)
  • SNOT disperses hexagonal boron nitride nanomaterials with a peak particle diameter below 100 nm. (cdc.gov)
  • As a boron component, boric acid and sodium tetraborate were used. (ktu.lt)
  • Boric acid and borates are boron-containing inorganic compounds found in soils. (borates.today)
  • These organic compounds are often used in cell metabolism in humans, where they are partially converted into boric acid. (borates.today)
  • Boron has been consumed for menstrual cramps and boric acid has been used vaginally for yeast infections, but evidence is limited. (medlineplus.gov)
  • Boric acid, a common form of boron, can kill yeast that cause vaginal infections. (medlineplus.gov)
  • Boric acid, a common form of boron, is likely safe when used for up to 6 months. (medlineplus.gov)
  • Boric acid powder, a common form of boron, is possibly unsafe when applied in large amounts to prevent diaper rash. (medlineplus.gov)
  • include boric acid, salts of borates, and boron oxide. (cdc.gov)
  • Boron is widely distributed in surface water lifetime exposure to boric acid in food. (cdc.gov)
  • developmental delays have occurred in newborn animals whose mothers were orally exposed to high doses of Has the federal government made boron (as boric acid) during pregnancy. (cdc.gov)
  • Boron compounds such as boric acid are common additions. (anvilfire.com)
  • Borax is a boron compound, a mineral and a salt of boric acid. (vetinfo.com)
  • Plants and bacteria use them to produce all known boron-containing organic compounds. (borates.today)
  • Combining the names of functional groups with the names of the parent alkanes generates what is termed a systematic nomenclature for naming organic compounds . (wikipedia.org)
  • Inorganic or organic compounds that contain boron as an integral part of the molecule. (bvsalud.org)
  • As one example, carboranes form useful molecular moieties that add considerable amounts of boron to other biochemicals in order to synthesize boron-containing compounds for boron neutron capture therapy for cancer. (wikipedia.org)
  • R. L. Moss, Critical review, with an optimistic outlook, on Boron Neutron Capture Therapy (BNCT). (isnct.net)
  • M. J. Luderer, P. de la Puente, A. K. Azab, Advancements in tumor targeting strategies for boron neutron capture therapy. (isnct.net)
  • Most head-and-neck cancers that recur locally after prior full-dose conventional radiation therapy respond to Boron Neutron Capture Therapy (BNCT). (scienceblog.com)
  • Boron neutron capture therapy (BNCT) is a form of targeted radiation treatment for cancer. (scienceblog.com)
  • Boron trifluoride is used in the petrochemical industry as a catalyst. (wikipedia.org)
  • We need to know how to draw the Lewis Structure of Boron Trifluoride to find out the arrangement of the electrons in both molecules present. (wellcometreeoflife.org)
  • BF3 or Boron Trifluoride is an inorganic compound that lacks Carbon. (wellcometreeoflife.org)
  • If you have any condition that might be made worse by estrogen, avoid supplemental boron or high amounts of boron from foods. (medlineplus.gov)
  • Ingestion of large amounts of boron can result in damage to the testes, intestines, liver, kidney, and brain. (cdc.gov)
  • will start with the periodic table and get the atomic number of Boron and Fluorine to calculate how many valence electrons are present in the chemical compound. (wellcometreeoflife.org)
  • Chemical bonding enables scientists to take the 100-plus elements of the periodic table and combine them in myriad ways to form chemical compounds and materials. (acs.org)
  • Borax is a widely used Boron compound that is used to give slimy serpents some relief from skin issues. (stonesoup.com)
  • Organoboron chemicals have been employed in uses as diverse as boron carbide (see below), a complex very hard ceramic composed of boron-carbon cluster anions and cations, to carboranes, carbon-boron cluster chemistry compounds that can be halogenated to form reactive structures including carborane acid, a superacid. (wikipedia.org)
  • Boron carbide is a ceramic material which is obtained by decomposing B2O3 with carbon in an electric furnace: 2 B2O3 + 7 C → B4C + 6 CO Boron carbide's structure is only approximately B4C, and it shows an apparent depletion of carbon from this suggested stoichiometric ratio. (mis-asia.com)
  • Still, with less carbon, the suggested C3 units are replaced with C-B-C chains, and some smaller (B6) octahedra are also present (see the boron carbide article for structural analysis). (mis-asia.com)
  • The repeating polymer plus the semi-crystalline structure of boron carbide gives it excellent structural strength per weight. (mis-asia.com)
  • Nuclear applications of boron carbide include shielding, control rods and shut-down pellets. (mis-asia.com)
  • Boron carbide is often powdered within control rods to increase its surface area. (mis-asia.com)
  • Boron carbide is a chemical compound with the formula B 4 C. It is an extremely hard ceramic . (wikipedia.org)
  • The mean oxidation number for the boron atoms is then simply the ratio of hydrogen to boron in the molecule. (wikipedia.org)
  • However, multiple boron atoms reacting with each other have a tendency to form novel dodecahedral (12-sided) and icosahedral (20-sided) structures composed completely of boron atoms, or with varying numbers of carbon heteroatoms. (wikipedia.org)
  • The first clinically used boron agent is sodium borocaptate (Na 2 B 12 H 11 SH, commonly known as BSH), whose structure is unique regular icosahedron of twelve boron atoms. (isnct.net)
  • The research team learned how to incorporate the fluorine-18 marker atoms into the chemical mechanism they used to create new compounds. (techbriefs.com)
  • BF3 has fluorine atoms at the top of the equilateral triangle formed with Boron atoms. (wellcometreeoflife.org)
  • The Lewis Dot Structure will show you one Boron atom with three electrons in its last shell and three Fluorine atoms with seven electrons in its last shell. (wellcometreeoflife.org)
  • It can sometimes be confusing whether BF3 is polar or nonpolar because the three Fluorine atoms have much higher electronegativity than the Boron atom. (wellcometreeoflife.org)
  • Cancer is subsequently irradiated with neutrons obtained from a nuclear reactor, which causes boron atoms to split within the cancerous tissue as a result from a boron neutron capture reaction. (scienceblog.com)
  • The biochemical activities of compounds that contain boron differ greatly depending on the organic ligands used and the binding constant of B compared to any specific molecule. (borates.today)
  • While studying chemical reactions of a gold-containing molecule, the research team happened upon a chemical mechanism that can be used to form trifluoromethyl (CF 3 ) compounds and attach them to other chemical compounds. (lbl.gov)
  • In work at the UC Berkeley campus, Levin and other researchers had been pursuing a chemical process to produce a fluorine-containing compound called hexafluoroethane, used to etch silicon for computer chips, associated with a gold-containing molecule. (lbl.gov)
  • In other work, a team of researchers had been pursuing a chemical process to produce a fluorine-containing compound called hexafluoroethane, used to etch silicon for computer chips, associated with a gold-containing molecule. (techbriefs.com)
  • Common borate compounds cosmetics and laundry products. (cdc.gov)
  • The boron nitrides are notable for the variety of structures that they adopt. (wikipedia.org)
  • Boron carbide's ability to absorb neutrons without forming long-lived radionuclides (especially when doped with extra boron-10) makes the material attractive as an absorbent for neutron radiation arising in nuclear power plants. (mis-asia.com)
  • Boron carbon compounds have been shown to have feasible superconductivity. (arxiv.org)
  • Especially, the tetrahedral preference of tetracoordinate carbon compounds, which was deduced by van't Hoff 1 and Lebel 2 more than a century ago, is one of the major foundations of organic chemistry. (nature.com)
  • In 1987, a Japanese dermatologist Dr. Mishima and his co-workers at Kobe University found that p -boronophenylalanine (BPA) is a suitable boron-delivery agent for BNCT to treat patients with cutaneous melanomas. (isnct.net)
  • In this method a boron-containing compound (boronophenylalanine) is first infused into a peripheral vein, following which the compound accumulates in cancer tissue. (scienceblog.com)
  • Sodium pentaborate pentahydrate gel, which contains boron, is likely safe when applied to the skin for up to 5 weeks. (medlineplus.gov)
  • It is often found combined with other substances to form compounds called borates. (cdc.gov)
  • The tumor imaging was made possible by fludeoxyglucose, a chemical compound containing a radioactive form of fluorine known as fluorine-18. (lbl.gov)
  • We hypothesize here that the cardiovascular protection provided by Mediterranean diets is guided more by the types and varieties of BCCs that provide specific biochemical activities relating to cardiovascular health than the simple total elemental boron content. (borates.today)
  • Organoboron(III) compounds are usually tetrahedral or trigonal planar, for example, tetraphenylborate, [B(C6H5)4]− vs. triphenylborane, B(C6H5)3. (wikipedia.org)
  • To add to this knowledge, we recently evaluated airway toxicity of the 3-carbon alpha-dicarbonyl compound, methylglyoxal. (cdc.gov)
  • A large number of anionic boron hydrides are known, e.g. (wikipedia.org)
  • In the most familiar compounds, boron has the formal oxidation state +3. (wikipedia.org)
  • More than one hundred borate minerals contain boron in oxidation state +3. (wikipedia.org)
  • For example, in diborane B2H6, the boron oxidation state is +3, but in decaborane B10H14, it is 7/5 or +1.4. (wikipedia.org)
  • In these compounds the oxidation state of boron is often not a whole number. (wikipedia.org)
  • As anticipated by its hydride clusters, boron forms a variety of stable compounds with formal oxidation state less than three. (wikipedia.org)
  • The oxidation number of boron in boron tribromide is 3 . (webelements.com)
  • A compound fertilizer with boron was granulated employing laboratory equipment. (ktu.lt)
  • The optimal conditions of a compound fertilizer with boron granulation were determined as 7% humidity of the raw materials′ mixture, 65-85 °C of granulators, as well as acidified water used for irrigation. (ktu.lt)
  • Also sold world wide under the trade name Solubor® as a boron fertilizer. (anvilfire.com)
  • These minerals resemble silicates in some respect, although boron is often found not only in a tetrahedral coordination with oxygen, but also in a trigonal planar configuration. (wikipedia.org)
  • Boron is likely safe when used in doses that don't exceed 20 mg daily. (medlineplus.gov)
  • Boron is possibly unsafe when taken in higher doses. (medlineplus.gov)
  • Taking boron by mouth in higher doses is possibly unsafe and has been linked to lower birth weights and birth defects. (medlineplus.gov)
  • The doses that produced these effects in animals are more than 1,800 times higher than the average daily intake of · Boron cannot be destroyed in the environment. (cdc.gov)
  • The larger boranes all consist of boron clusters that are polyhedral, some of which exist as isomers. (wikipedia.org)
  • 4 These nanomaterials can deliver high concentration of boron to tumor issues due to their enhanced permeability and retention (EPR) effect. (isnct.net)
  • Boron seems to affect the way the body handles other minerals such as calcium, magnesium, and phosphorus. (medlineplus.gov)
  • Boron supplements can increase how much magnesium stays in the body. (medlineplus.gov)
  • Boranes are chemical compounds of boron and hydrogen, with the generic formula of BxHy. (wikipedia.org)
  • Applying boron gel to the skin might help prevent skin damage caused by radiation therapy. (medlineplus.gov)
  • Boron-mediated targeting of radiation allows treatment of patients who can no longer be treated with conventional radiation therapy. (scienceblog.com)
  • A large number of organoboron compounds are known and many are useful in organic synthesis. (wikipedia.org)
  • Their discovery could aid in the synthesis of new "radiotracers" - chemical compounds that contain a radioactive form, or isotope, of an element - for use with a noninvasive, high-resolution 3-D medical imaging technology known as PET (positron emission tomography) scanning. (lbl.gov)
  • This discovery could aid in the synthesis of new "radiotracers" - chemical compounds that contain a radioactive isotope of an element - for use with PET (positron emission tomography) scanning. (techbriefs.com)
  • [1] [2] This enables systematic prediction of chemical reactions and behavior of chemical compounds and the design of chemical synthesis . (wikipedia.org)
  • Asymmetric Synthesis;B (Classes of Boron Compounds);B-Bromocatecholborane, etc. (lookchem.com)
  • Chris' current research interests include the synthesis of novel transition metal catalysts and the biological activity of boron-containing compounds. (mta.ca)
  • Nutrients that the body can synthesize from other compounds, although they may also be derived from the diet, are considered nonessential. (msdmanuals.com)
  • Boron is found in nature on Earth almost entirely as various oxides of B(III), often associated with other elements. (wikipedia.org)
  • Boron is naturally found in water and foods such as nuts and vegetables. (medlineplus.gov)
  • Today, Teflon-like compounds called PFAS are found in the blood of almost all Americans. (ewg.org)
  • Researchers have found a surprisingly versatile workaround to create chemical compounds that could prove useful for medical imaging and drug development. (lbl.gov)
  • Unexpectedly, they found a mechanism by which the boron compound acts on a CF 3 compound to produce a CF 2 fragment associated with the gold catalyst. (lbl.gov)
  • BF3 has SP2 hybridization since Boron (1) requires one π (pi) bond to double bond, but it only formed three σ bonds per atom. (wellcometreeoflife.org)
  • You will not see three lone pairs in BF3 since all three electrons bonded with the Boron atom. (wellcometreeoflife.org)
  • A fluorine atom is positioned at 120°, which is bonded with the center atom Boron in the Lewis Structure. (wellcometreeoflife.org)
  • In BF3, Boron is the least electronegative atom and will be used as the central atom. (wellcometreeoflife.org)
  • No, Fluorine will not be the center atom of BF3 because it is more electromagnetic than Boron. (wellcometreeoflife.org)
  • This created no lone pairs between the Boron atom and Fluorine. (wellcometreeoflife.org)
  • The tourmaline group of borate-silicates is also a very important boron-bearing mineral group, and a number of borosilicates are also known to exist naturally. (wikipedia.org)
  • Risk factors for cardiovascular diseases may be noticeably improved by the intake of boron-containing compounds. (borates.today)
  • The EPA has determined that lifetime exposure to 1 ppm used according to their directions and should be kept boron is not expected to cause any adverse effects. (cdc.gov)
  • In 1967, Dr. Hatanaka and co-workers first reported the great potential of BSH as a boron agent for treatment of brain tumor. (isnct.net)
  • To achieve high accumulation of BSH to tumor tissues, a wide variety of boron carriers have been developed, such as BSH-containing distearoyl lipid liposomes (DSBL, Figure 2a), 3 a block polymer PEG- b -P(Glu-SS-BSH) that forms polymeric micelles (Figure 2b). (isnct.net)
  • So in testing the biological uptake of drugs that incorporate CF 3 compounds, it's useful to incorporate fluorine-18 ( 18 F), a radioactive isotope of fluorine, in the CF 3 compound as a sort of label or "tracer" that can be detected by PET scanners. (lbl.gov)
  • These compounds are Lewis acids in that they readily form adducts with electron-pair donors, which are called Lewis bases. (wikipedia.org)
  • This fragment, they observed, can then bond with other chemical compounds and in a next step form a new CF 3 -containing compound. (lbl.gov)
  • Boron compounds have been shown to stimulate the reactive uptake of CO2 into aqueous media. (borates.today)
  • The 3,300 milligrams of BN thermal compound transfers heat from the side of the CPU opposite the vapor chamber, dissipating the heat from chip much more efficiently, and ensuring maximum performance of the CPU and GPU for a stable gaming framerate. (asus.com)
  • The pharmaceutical field and the diagnostic medicine field have been very limited in getting compounds that have been labeled with radioactive CF 3 and yet there are a lot of drugs that have these CF 3 groups in them. (techbriefs.com)
  • Do not take boron supplements if you have kidney problems. (medlineplus.gov)
  • The research team tapped the mechanism to incorporate fluorine-18 in CF 3 compounds they created. (lbl.gov)
  • In the case of Boron and Fluorine, their 0.5 electronegativities are categorized as nonpolar. (wellcometreeoflife.org)
  • According to the Octet, Boron requires six valence electrons around its outermost shell, while Fluorine (2) needs 8. (wellcometreeoflife.org)
  • Flourine-18 has a half-life of about 110 minutes, which means its radioactive output is halved every 110 minutes, and the chemical processes incorporating it as a label must be designed to rapidly attach it to compounds of interest. (lbl.gov)
  • There are six valence electrons around Boron in BF3 based on the drawing of the Lewis structure. (wellcometreeoflife.org)
  • These tests can show you were exposed to boron, but in people. (cdc.gov)