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Germane Facts About Germanium Sesquioxide: I. Chemistry and Anticancer Properties
THE JOURNAL OF ALTERNATIVE AND COMPLEMENTARY MEDICINE Volume 10, Number 2, 2004, pp. 337–344 ©Mary Ann Liebert, Inc. Germane Facts About Germanium Sesquioxide: I. Chemistry and Anticancer Properties BONNIEJ. KAPLAN, Ph.D., 1 W. WESLEYPARISH, Ph.D., 2 G. MERRILLANDRUS, Ph.D., 2 J. STEVENA. SIMPSON, Ph.D., M.D., 3 and CATHERINEJ. FIELD, Ph.D., R.D. 4 ABSTRACT This paper reviews the history, chemistry, safety, toxicity, and anticancer effects of the organogermanium compound bis (2-carboxyethylgermanium) sesquioxide (CEGS). A companion review follows, discussing the inaccuracies in the scientific record that have prematurely terminated research on clinical uses of CEGS. CEGS is a unique organogermanium compound first made by Mironov and coworkers in Russia and, shortly there- after, popularized by Asai and his colleagues in Japan. Low concentrations of germanium occur in nearly all soils, plants and animal life; natural occurrence of the CEGS form is postulated but not yet demonstrated. The literature demonstrating its anticancer effect is particularly strong: CEGS induces interferon- g (IFN-g), en- hances natural killer cell activity, and inhibits tumor and metastatic growth—effects often detectable after a single oral dose. In addition, oral consumption of CEGS is readily assimilated and rapidly cleared from the body without evidence of toxicity. Given these findings, the absence of human clinical trials of CEGS is un- expected. Possible explanations of why the convincing findings from animal research have not been used to support clinical trials are discussed. Clinical trials on CEGS are recommended. INTRODUCTION bispropionic acid; 3-oxygermylpropionic acid polymer; poly- trans-(2-carboxyethyl) germasesquioxane); proxigerma- n general, dietary supplements are an underinvestigated nium; repagermanium; and Serocion. -
Lactide/^Caprolactone Polymerization Behavior of Monomeric Aryloxytitanatrane
698 Bull. Korean Chem. Soc. 2007, Vol. 28, No. 4 Notes Synthesis, X-ray Structure, and /-Lactide/^Caprolactone Polymerization Behavior of Monomeric Aryloxytitanatrane Sang-deok Mun, Younjin Hong, and Youngjo Kim* Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea. *E-mail: 가[email protected] Received February 2, 2007 Key Words : Titanatrane, Mononuclear, Ring opening polymerization, Polylactide, Polycaprolactone The chemistry of atrane coordinated by the central nitro polymerization (ROP) of l-lactide (l-LA) or ^caprolactone gen atom as well as all three arms of deprotonated triethanol 任-CL) are now one of popular research fields in the homo amine ligand, imino-2,2',2''-triethanolate, has been inten geneous catalysis. In this regard, a new mononuclear tita- sively studied over the past few decades and its examples are natrane obtained was used as a catalyst for the ROP of l-LA now known across the periodic table.1 Most studies have and £-CL. focused on the use of main group elements such as silicon, The treatment of Ti(O-i-Pr)4 with 1 equivalent of 2,6-di- phosphorus, aluminum, and tin in the formation of atrane.1 tert-butylphenol and 1 equivalent of triethanolamine in THF In view of the well known significant number of similarities gave, after workup, novel mononuclear titanatranes 1 as in the chemistries of tin and titanium, relatively few reports orange-yellow crystals in 81% isolated yield. After recrystal have appeared concerning metallic titanatranes with a lization using toluene, 1 was used as a catalyst for making transannular N—Ti bond from bridgehead N atom in polylactide (PLA) and polycaprolactone (PCL). -
The Photochemistry of Some Acyclic Ketones Containing a Silicon Or a Tin Atom
University of New Hampshire University of New Hampshire Scholars' Repository Doctoral Dissertations Student Scholarship Summer 1965 THE PHOTOCHEMISTRY OF SOME ACYCLIC KETONES CONTAINING A SILICON OR A TIN ATOM PERRY LESTER MAXFIELD Follow this and additional works at: https://scholars.unh.edu/dissertation Recommended Citation MAXFIELD, PERRY LESTER, "THE PHOTOCHEMISTRY OF SOME ACYCLIC KETONES CONTAINING A SILICON OR A TIN ATOM" (1965). Doctoral Dissertations. 816. https://scholars.unh.edu/dissertation/816 This Dissertation is brought to you for free and open access by the Student Scholarship at University of New Hampshire Scholars' Repository. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of University of New Hampshire Scholars' Repository. For more information, please contact [email protected]. This dissertation has been microfilmed exactly as received 6 6-5974 MAXFIELD, Perry Lester, 1933- THE PHOTOCHEMISTRY OF SOME ACYCLIC KETONES CONTAINING A SILICON OR A TIN ATOM. University of New Hampshire, Ph.D., 1965 Chemistry, organic University Microfilms, Inc., Ann Arbor, Michigan THE PHOTOCHEMISTRY OF SOME ACYCLIC KETONES CONTAINING A SILICON OR A TIN ATOM BY PERRY LESTER MAXFIELD B. S., Brigham Young University, 1961 A THESIS Submitted to the University of New Hampshire In Partial Fulfillment of The Requirements for the Degree of Doctor of Philosophy Graduate School Department of Chemistry August, 1964 This thesis has been examined and approved. Date ACKNOWLEDGMENT I wish to express my gratitude to the Department of Chemistry of the University of New Hampshire for the help and guidance which I have received during my stay here. Acknowledg ment is also due the United States Department of Health, Edu cation, and Welfare for a National Defense Education Fellow ship which has been so helpful in financing the three years of study. -
Kanker Begrijpen De Wijsheid Van Het Lichaam
TherapieWijzer Kanker begrijpen De wijsheid van het lichaam voeding beweging leefstijl bioactieve stoffen supplementen niet-toxische therapieën chemo & straling ondersteunen bijwerkingen beperken Hilde Maris Referenties 1. Hoe ontstaat kanker? Alzoubi K, Khabour O, Hussain N, et al. Evaluation of vita- cine. 6th edition. Hamilton (ON): BC Decker; 2003. min B12 effects on DNA damage induced by pioglitazone. Liu HK, Wang Q, Li Y, et al. Inhibitory effects of gamma- Mutat Res. 2012 Oct 9;748(1-2):48-51. tocotrienol on invasion and metastasis of human gastric Azqueta A, Collins AR. Carotenoids and DNA damage. adenocarcinoma SGC-7901 cells. J Nutr Biochem. 2010 Mutat Res. 2012 May 1;733(1-2):4-13. Mar;21(3):206-13. Barrett JC. Mechanisms of multistep carcinogenesis and Liu R, Fu A, Hoffman AE, et al. Melatonin enhances DNA carcinogen risk assessment. Environ Health Perspect. repair capacity possibly by affecting genes involved in 1993 Apr;100:9-20. DNA damage responsive pathways. BMC Cell Biol. 2013 Bhat FA, Sharmila G, Balakrishnan S, et al. Querce- Jan 7;14:1. tin reverses EGF-induced epithelial to mesenchymal Lotan R1. Retinoids as modulators of tumor cells invasion transition and invasiveness in prostate cancer (PC-3) cell and metastasis. Semin Cancer Biol. 1991 Jun;2(3):197- line via EGFR/PI3K/Akt pathway. J Nutr Biochem. 2014 208. Nov;25(11):1132-9. Lyons NM, O’Brien NM. Modulatory effects of an algal Cash SW, Beresford SA, Vaughan TL, et al. Recent physi- extract containing astaxanthin on UVA-irradiated cells in cal activity in relation to DNA damage and repair using the culture. -
Organometallic Compounds Suitable for Use in Vapor Deposition Processes
Europäisches Patentamt *EP001464724A2* (19) European Patent Office Office européen des brevets (11) EP 1 464 724 A2 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: (51) Int Cl.7: C23C 16/22, C07F 7/30, 06.10.2004 Bulletin 2004/41 C07F 7/02 (21) Application number: 04251948.8 (22) Date of filing: 01.04.2004 (84) Designated Contracting States: (72) Inventors: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR • Shenai-Khatkhate, Deodatta Vinayak HU IE IT LI LU MC NL PL PT RO SE SI SK TR Danvers Massachusetts 01923 (US) Designated Extension States: • Power, Michael Brendan AL HR LT LV MK Newburyport Massachusetts 01950 (US) (30) Priority: 05.04.2003 US 460791 P (74) Representative: Kent, Venetia Katherine 22.10.2003 US 513476 P Rohm and Haas (UK) Ltd European Patent Department (71) Applicant: Rohm and Haas Electronic Materials, 28th. Floor, City Point L.L.C. One Ropemaker Street Marlborough, Massachusetts 01752 (US) London EC2Y 9HS (GB) (54) Organometallic compounds suitable for use in vapor deposition processes (57) Organometallic compounds suitable for use as metallic precursors are also provided. Such Group IV vapor phase deposition precursors for Group IV metal- metal-containing films are particularly useful in the man- containing films are provided. Methods of depositing ufacture of electronic devices. Group IV metal-containing films using certain organo- EP 1 464 724 A2 Printed by Jouve, 75001 PARIS (FR) EP 1 464 724 A2 Description Background of the Invention 5 [0001] The present invention relates generally to the field of organometallic compounds. -
Electron Transfer and Modification of Oligosilanylsilatranes and Related
This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. Article pubs.acs.org/Organometallics Electron Transfer and Modification of Oligosilanylsilatranes and Related Derivatives † ‡ § Mohammad Aghazadeh Meshgi, Judith Baumgartner,*, Viatcheslav V. Jouikov,*, † and Christoph Marschner*, † Institut für Anorganische Chemie, Technische Universitaẗ Graz, Stremayrgasse 9, 8010 Graz, Austria ‡ Institut für Chemie, Universitaẗ Graz, Stremayrgasse 9, 8010 Graz, Austria § UMR 6226, Chimie et Photonique Moleculaires,́ Universitéde Rennes 1, 35042 Rennes, France *S Supporting Information ABSTRACT: Several silatranyl -substituted oligosilanes were prepared starting from bis(trimethylsilyl)silatranylsilanide. Electrochemical and theoretical investigations of some oligosilanes revealed that electrooxidation occurs by formation of a short-lived cation radical. This species undergoes structural relaxation to form a pair of conformers, with endo and exo relationships with respect to the Si−N interaction. Reaction of a 1,4-disilatranyl-1,4-disilanide with 1,2- dichlorotetramethyldisilane gave a mixture of cis and trans diastereomers of a cyclohexasilane with the trans isomer showing a diminished Si−N distance. ■ INTRODUCTION along the Si−N dative bond reflects the nature of Si−N − Among hypercoordinated silicon compounds silatranes (Figure bonding. In fact the Si N bonding neither is covalent nor is − 8 1) occupy a prominent position.1 4 The suffix “atrane” was based on intermolecular charge transfer. What happens with this unusual bond upon electron withdrawal, for instance during electrooxidation, is of a great interest (for classical bonds see ref 9) but is not known so far. -
Calculations
A University of Sussex DPhil thesis Available online via Sussex Research Online: http://sro.sussex.ac.uk/ This thesis is protected by copyright which belongs to the author. This thesis cannot be reproduced or quoted extensively from without first obtaining permission in writing from the Author The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the Author When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given Please visit Sussex Research Online for more information and further details I. Group 14 Metal Alkoxides: Synthesis and Reactivity Studies II. Synthesis of Novel Planar Chiral Complexes Based on [2.2]Paracyclophane Lorenzo Ferro DPhil Chemistry University of Sussex May 2011 I hereby declare that this thesis has not been and will not be, submitted in whole or in part to another University for the award of any other degree. Signature________________________________________ UNIVERSITY OF SUSSEX LORENZO FERRO, DPHIL CHEMISTRY I. GROUP 14 METAL ALKOXIDES: SYNTHESIS AND REACTIVITY STUDIES II. SYNTHESIS OF NOVEL PLANAR CHIRAL COMPLEXES BASED ON [2.2]PARACYCLOPHANE ABSTRACT I. A series of group 14 β-diketiminate alkoxides (BDI)EOR (BDI = i i s t [CH{(CH3)CN-2,6- Pr2C6H3}2; E = Ge, Sn, Pb; R = Pr, Bu, Bu) was synthesised and characterised. The reactivity towards aliphatic and unsaturated electrophiles was investigated. For the tin and lead systems, an unexpected trend was observed. For instance, they do not or very sluggishly react with aliphatic electrophiles, but readily activate carbon dioxide. -
Template for Electronic Submission to ACS Journals
Understanding the role of Ti-rich domains in the stabilization of gold nanoparticles on mesoporous silica-based catalysts Alaina Moragues a, Begoña Puértolas b, Álvaro Mayoral c,d, Raúl Arenal c,d, Ana B. Hungría e, Sonia Murcia-Mascarós a, Stuart H. Taylor f, Benjamín Solsona g,*, Tomás Garcíab,*, Pedro Amorós a,* a Institut de Ciència dels Materials, Universitat de València, P.O. Box 22085, 46071 Valencia, Spain. b Instituto de Carboquímica (ICB-CSIC), C/ Miguel Luesma Castán 4, 50018 Zaragoza, Spain. c Laboratorio de Microscopias Avanzadas (LMA), Instituto de Nanociencia de Aragon (INA), Universidad de Zaragoza, Mariano Esquillor, 50018 Zaragoza, Spain. d Fundación Agencia Aragonesa para la Investigación y el Desarrollo (ARAID), María de Luna 11, 50018 Zaragoza, Spain. e Departamento de Ciencia de Materiales, Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cádiz, Campus Río San Pedro, 11510 Puerto Real, Spain. f Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, CF10 3AT Cardiff, United Kingdom. g Departamento de Ingenieria Quimica, Universitat de València, Avenida de la Universitat, 46071 Valencia, Spain. *Corresponding authors at: Institut de Ciència dels Materials, Universitat de València, P.O. Box 22085, 46071 Valencia, Spain (Pedro Amorós). E-mail addresses: [email protected], [email protected], [email protected] 1 ABSTRACT The preparation and stabilization of gold nanoparticles with a precise control of size and dispersion is highly attractive for a variety of applications, and a key aspect is thermal stability of the nanoparticles. This paper focuses on understanding the effect of TiO2-based nanodomains, dispersed on mesoporous silicas, and how they control gold nanoparticle stability. -