Rimma Fedorovna Klevtsova (October 22, 1928–November 9, 2010)

Obituaries

Rimma Fedorovna Klevtsova (October 22, 1928–November 9, 2010)     

Petr Vasil’evich Klevtsov (July 2, 1930–January 7, 2005)

Obituaries

Petr Vasil’evich Klevtsov (July 2, 1930–January 7, 2005)     

Lev Aleksandrovich Shuvalov (November 15, 1923–December 6, 2004)

Obituaries

Lev Aleksandrovich Shuvalov (November 15, 1923–December 6, 2004)     

Natal’ya Aleksandrovna Tyapunina (August 11, 1922–February 18, 2009)

Crystallography Reports -     

Mikhail Grigor’evich Mil’vidskiĭ (August 2, 1932–April 22, 2009)

Obituaries

Mikhail Grigor’evich Mil’vidskiĭ (August 2, 1932–April 22, 2009)     

Yuriĭ Klavdievich Egorov-Tismenko (May 26, 1938–July 16, 2007)

Obituaries

Yuriĭ Klavdievich Egorov-Tismenko (May 26, 1938–July 16, 2007)     

Kirill Sergeevich Aleksandrov (January 9, 1931–July 10, 2010)

Obituaries

Kirill Sergeevich Aleksandrov (January 9, 1931–July 10, 2010)     

Nikolai Andreevich Kiselev (October 5, 1928–September 17, 2016)

Crystallography Reports -     

Lyudmila Nikolaevna Dem’yanets (February 6, 1939–December 12, 2010)

Obituaries

Lyudmila Nikolaevna Dem’yanets (February 6, 1939–December 12, 2010)     

Yuriĭ Andreevich Osip’yan (February 15, 1931–September 10, 2008)

Crystallography Reports -     

1996 Society For Information Display, 12–17 May,San Diego,California

Abstract

The annual Society for information Display (SiD) Conference was held in beautiful San Diego, California. The SiD Symposia are certainly the best way for researchers and technologists to keep in touch with the ever changing and dynamic display arena. The 1996 SID Symposium was an exciting, highly informative, and entertaining event that made participants more knowledgeable, effective, and productive. I strongly encourage that more ILCS members take part in the SID Symposia in the future. The conference is heavily dominated by liquid crystal materials and displays. Although it is strongly focused towards electro-optic appllcations and displays, there is a lot of basic physlcs, chemistry, and engineering to be learned from the excellent papers and talks. The proceedings are published in a 1022 page volume entitled SID International Symposium Digest of Technical Papers, Volume XXVII (ISSN 0097-966X). edited by Jay Morreale, and it can be purchased from SID, 1526 Brookhollow Drlve, Suite 82, Santa Ana, CA 92705-5421, USA.     

Igor’ Grigor’evich Chistyakov (1929–1982) (On the occasion of his 80th birthday)

Memorial Data

Igor’ Grigor’evich Chistyakov (1929–1982) (On the occasion of his 80th birthday)     

5-(thien-2-yl) uracil analogs: 5-(5-methylthien-2-yl)-2′-deoxyuridine, 5-(5-thien-2-yl)-2′-deoxyuridine,and 5-(5-bromothien-2-yl)-2′-deoxyuridine

Crystal structures of 5-(5-methylthien-2-yl)-2-deoxyuridine (I), 5-(5-thien-2-yl)-2-deoxyuridine (II) and 5-(5-bromothien-2-yl)-2-deoxyuridine (III) have been obtained from data collected on a four-circle Enraf-Nonius diffractometer (CAD-4 system). Space group, unit/cell parameters and finalR indices are:I, monoclinic,P2₁,a=9.105(2),b=20.819(2),c=7.932(2) Å, =98.79(2)°,R=5.7%;II, monoclinic,P2₁,a=8.720(4),b=20.793(4),c=7.884(4) Å, =95.06(2)°,R=5.8%;III, monoclinic,P2₁,a=9.260(2),b=41.655(7),c=7.926(2) Å, =97.996(13)°,R=9.4%. Structural properties of the title compounds are compared with those of 5-(5-chlorothien-2-yl)-2-deoxyuridine (IV) previously reported in order to explain their affinity for HSV-1 thymidine kinase and their eventual interaction with viral DNA polymerase. The main structural features observed are the coplanarity of the uracil and thienyl cycles stabilized by a S–O intramolecular interaction and the formation of dimeric intermolecular H bonds between two uracil moieties.     

Electronic conduction in (Bi,Pb)–Sr–Ca–Cu–O granular superconductors

Granular superconductors are very interesting materials owing to their untypical electrical properties caused by the presence of Coulomb effects, electron tunnelling, Josephson coupling between granules and various aspects of disorder. The electrical properties of (Bi,Pb)–Sr–Ca–Cu–O granular superconductors obtained by the solid state crystallization method have been studied in this paper. The materials may be considered as a system of granules of a high-temperature suprconductor embedded in the insulating matrix. The main parameter which determines the properties of granular materials is the tunnelling conductivity between the neighboring grains. Composed of small weakly coupled granules they are characterized by hopping conductivity exponential dependence. Samples containing relatively large granules of the 2212 phase (above 30 nm), with larger inter-grain conductivity, above the transition temperature, exhibit a logarithmic temperature dependence of resistivity.     

Crystal structures of (η5-C5H4COMe)M(CO)3Me (M=Mo,W)

The crystal structures of ( ⁵-C₅H₄COMe)M(CO)₃Me (M=Mo,W) have been determined. They are not isostructural. M=Mo isP2₁/c,a=10.205(6),b=14.192(8),c=8.135(6) Å,=93.43(4)° andD(calc)=1.71 g cm^–3 forZ=4. M=WisP2₁/c,a=12.580(7),b=6.830(5),c=13.750(7) Å,=93.72(4)° andD(calc)=2.20 g cm^–3 forZ=4. Both have a four-legged piano stool geometry with the substituted carbon making the closest M-C( ⁵) approach. The methyl group in the M=W derivative is disordered between twotrans-ligand positions. The average bonding parameters for the more accurately determined Mo analog are: Mo-C()⁵)=2.34(3) Å, Mo-CO=1.98(2) Å, Mo-Me=2.304(4) Å.