Search Results

You are looking at 1 - 10 of 447 items :

  • "Boron Compounds" x
Clear All

Effects of Some Boron Compounds on Peripheral Human Blood Hasan Türkeza,*, Fatime Geyikoğlua, Abdulgani Tatarb, Sait Keleşc, and Asuman Özkanc a Department of Biology, Faculty of Arts and Sciences, Atatürk University, 25240, Erzurum, Turkey. Fax: +90 44 22 36 09 48. E-mail: hasanturkez@yahoo.com b Department of Medical Genetics, Medical Faculty, Atatürk University, 25240, Erzurum, Turkey c Department of Biochemistry, Medical Faculty, Atatürk University, 25240, Erzurum, Turkey * Author for correspondence and reprint requests Z. Naturforsch. 62c, 889Ð896 (2007

[ 64 ]. A nanocomposite of the boron compound-attached poly(L-lactide-co-glycolide) (PLLGA) was reported by Takeuchi et al. [ 65 ]. The nanoparticles have the diameters of 100–150 nm in which the 100-nm particles reached a boron concentration of 113.9±15.8 μg/g of tissue in the tumor-bearing mice after 8 h of composite drug administration [ 65 ]. The tumor/blood ratio of boron concentration was greater than 5 after 8–12 h of injection. In addition, the boron atoms were excreted mainly in the urine. These results indicated that such type of nanoparticles is extremely

INDUSTRIAL APPLICATIONS OF BORON COMPOUNDS RAYMOND THOMPSON Borax Consolidated Limited, Borax Research Centre, Cox Lane, Chessington, Surrey, UK ABSTRACT An inverse proportionality exists between industrial production and scientific interest in boron compounds. Despite the vast amount of research which has been done both academically and industrially, the four simple substances borax, boric acid, calcium borate and sodium perborate account for 99 per cent of the industrial applications in tonnage (production being over two million tons annually) and

widely used in our daily life (such as in housing materials, transport, and electrical engineering), and new flame retardants are being studied for their polymer composites in order to decrease their properties of high flammability [ 6 ]. One of the flame retardants which can be used in polymer composites is boron; it is part of a halogen-free flame-retardant group similar to phosphorus and nitrogen flame retardants. The main elements of the flame-retardant properties of boron compounds are their extraordinary properties of low toxicity, low cost, and easy availability

~ & AppZ. Chem.~ Val. 49, pp. 749 - 764. Pergamon Press, 1977. Printed in Great Britain. THE CYCLIC COORDINATION OF BORON COMPOUNDS B. M. Mikhailov The N.D. Zelinsky Institute of Organic Chemistry 1 Academy of Sciences 1 Hoscowl USSR Abstract The methods of synthesisl structure and reactivities of the cyclic boron com~ounds having the double inner coordination of R2B groups with terminal heteroRtorns in the five- and three- rneinbered chains are discussed. fo -Diketonates 1 ß-ketoiminates 1 fo-diiminatesl diacetarnidatesl acylamidinates 1 imidoylamidina

PuPe & AppZ.. Chem., Vol. 49, pp. 701 - 716. Pergamon Press, 1977. Printed in Great Britain~ · BH EFFECTS OF ORBITAL VACANCIES IN BORON COMPOUNDS William N. Lipscomb Department of Chemistry, Harvard University, Cambridge, Massachusetts 02138, USA Abstract - Addition of H2 _to BH3 yields BHs, which is shown to be of c8 symmetry. Rearrangement mechanisms and hydrogen loss have been examined. Intermediates such as s 3H7 and B4H8 have been predicted to have vacant orbital structures in which the stability gained by filling that orbital is balanced by

METALL-BOR-VERBINDUNGEN X 1083 Metall-Bor-Verbindungen X 1 Diborylamine als ^-Liganden in Palladiumkomplexen Metal Boron Compounds X 1 Diborylamines as rr-Ligands in Palladium Complexes G ü n t e r S c h m id und L o t h a r W e b e r Institut für Anorganische Chemie der Universität Marburg/Lahn (Z. Naturforsch. 25 b, 1083— 1086 [1970] ; eingegangen am 7. Juli 1970) Herrn Prof. Dr. K a r l D im r o t h zum 60. Geburtstag am 18. August 1970 gewidmet Bis (dimethylamino)-boronhalides react with dibenzonitrile palladium-dichloride (C6H5CN) 2PdCl2 in a

BAND 26 b ZEITSCHRIFT FÜR NATURFORSCHUNG H E F T F. Metall-Bor-Verbindungen, XII * Diphenylboryl- und Dibromboryl-stannane Metal Boron Compounds, XII Diphenylboryl and Dibromoboryl Stannanes H E I N R I C H N Ö T H , H E L W I G SCHÄFER u n d G Ü N T E R S C H M I D Institut für Anorganische Chemie der Universität Marburg/Lahn (Z. Naturforsch. 26 b, 497—503 [1973] ; eingegangen am 1. April 1971) Herrn Professor Dr. Dr. mult. h. c. E. WIBERG zum 70. Geburtstag gewidmet Diphenylboryl stannanes [ (C6H5)2B]4_ w Sn(CH3) n (n = 0, 1, 2, 3) are produced from

Notizen 903 Einfache Synthese funktioneller Mono- und Di(f-butyl)borverbindungen Facile Synthesis of Functional Mono- and Di(7-butyl)boron Compounds Gerhard Müller* und Joachim Lachmann Fakultät für Chemie der Universität Konstanz, Universitätsstraße 10, D-W -7750 Konstanz Z. Naturforsch. 47b, 9 0 3 -9 0 4 (1992); eingegangen am 3. Februar 1992 Boron Compounds, Steric Hindrance The functional mono- and di(f-butyl)boron compounds 'BuB(OMe)2 and 'Bu2BOMe are easi­ ly prepared in good yield by a one-pot synthesis from excess B(OM e)3 and r-butyllithium in

The Effects of Boron Compounds on the Properties of Cementitious Composites Metin Davraz Department of Construction, Senirkent Vocational School, Süleyman Demirel University, 32600, Senirkent/Isparta, Turkey Tel.: +90-246-2111740. E-mail address:davrazm@gmail.com, dawazm@sdu.edu.tr ABSTRACT The retarding and stopping effects of boron compounds at even very low concentrations on the process of cement hydration are well known phenomena. Due to this property, boron compounds are used in concrete and other cementitious composites as set retarding additives. In