N-Acetyl Derivatives of Type C Fumonisins Produced byFusariumoxysporum

1999 ◽  
Vol 62 (2) ◽  
pp. 355-357 ◽  
Author(s):  
Jeong-Ah Seo ◽  
Jin-Cheol Kim ◽  
Yin-Won Lee
Keyword(s):  
Type C ◽  
Derivatives Of

scholarly journals Characterization of KPC-Encoding Plasmids from Enterobacteriaceae Isolated in a Czech Hospital

2017 ◽  
Vol 62 (3) ◽  
Author(s):  
Rudolf Kukla ◽  
Katerina Chudejova ◽  
Costas C. Papagiannitsis ◽  
Matej Medvecky ◽  
Katerina Habalova ◽  
...  
Keyword(s):  
Multidrug Resistance ◽  
Type A ◽  
Type B ◽  
Content Type ◽  
Type C ◽  
Derivatives Of

ABSTRACT Ten Enterobacteriaceae isolates collected in a Czech hospital carried bla KPC -positive plasmids of different sizes (∼30, ∼45, and ∼80 kb). Sequencing revealed three types of plasmids (A to C) with the Tn 4401a transposon. Type A plasmids comprised an IncR backbone and a KPC-2-encoding multidrug resistance (MDR) region. Type B plasmids were derivatives of type A plasmids carrying an IncN3-like segment, while type C plasmids were IncP6 plasmids sharing the same KPC-2-encoding MDR region with type A and B plasmids.

Phenylation of Fullerene-C60

1994 ◽  
Vol 349 ◽  
Author(s):  
Roger Taylor ◽  
Anthony G. Avent ◽  
Paul R. Birkett ◽  
Jon C. Crane ◽  
Adam D. Darwish ◽  
...  
Keyword(s):  
Ferric Chloride ◽  
Fullerene C60 ◽  
Type C ◽  
Derivatives Of

ABSTRACTC60 Cl6 can be phenylated and arylated to give derivatives of the type C60Ar5Cl, which may be readily converted to C60Ar5. The compounds C60Ar5 and various other phenylated derivatives have been isolated from the product of reaction of [60]fullerene with bromine/ferric chloride/benzene, and partially characterised.

Aminocyclophosphazene Derivatives of Tungsten Carbonyl

1999 ◽  
Vol 54 (12) ◽  
pp. 1543-1546
Author(s):  
A. K. Shrimal
Keyword(s):  
Mixed Ligand ◽  
Tungsten Carbonyl ◽  
Type C ◽  
Derivatives Of

Reactions of aminated cyclotri- and cyclotetra-phosphazenes, viz., N3P3L6 and N4P4L8 (L = -NC4H8O, -NC5H10, -HNC6H11 and -HNC8H17) with W(CO)6 have been studied. [(N3P3L6)W(CO)3] derivatives are obtained with N3P3L6 while N4P4L8 yield tetracarbonyl substituted derivatives, [(N4P4L8)W(CO)4]. Mixed ligand tungsten tricarbonyls of the type [C12H8N2)(N3P3L6 or N4P4L8)W(CO)3] have also been synthesized with [(o-phen)W(CO)4].

13C, 29Si, 115Sn, 117Sn and 119Sn NMR spectra of some triphenyl derivatives of elements of IVB group

1981 ◽  
Vol 46 (6) ◽  
pp. 1383-1388 ◽  
Author(s):  
Antonín Lyčka ◽  
Dobroslav Šnobl ◽  
Karel Handlíř ◽  
Jaroslav Holeček ◽  
Milan Nádvorník
Keyword(s):  
Nmr Spectra ◽  
Chemical Shifts ◽  
Coupling Constants ◽  
119Sn Nmr ◽  
Type C ◽  
Derivatives Of

13C, 29Si and Sn NMR spectra of ten compounds type (C6H5)3XY, four compounds type ((C6H5)3XO)2CrO2 and - for comparison - two compounds type (CH3CH2CH2CH2)3SnY and ((CH3CH2CH2CH2)3SnO)2CrO2 (X are elements of IVB group) have been measured in deuteriochloroform. The respective chemical shifts, absolute values of coupling constants nJ(119Sn13C) and 2J(119Sn117Sn) are given.

Fragmentation and rearrangement processes in the mass spectra of perhalogenoaromatic compounds. Part II. Pentafluorophenyl derivatives of GroupIV

1969 ◽  
Vol 47 (10) ◽  
pp. 1613-1620 ◽  
Author(s):  
J. M. Miller
Keyword(s):  
Mass Spectra ◽  
Central Atom ◽  
Metal Fluoride ◽  
Fluoride Ions ◽  
Bond Forming ◽  
Central Carbon ◽  
Type C ◽  
Derivatives Of ◽  
Rearrangement Processes ◽  
Neutral Metal

The mass spectra of compounds of the type (C6F5)4M (M = Si, Ge, Sn, and Pb) have been studied. Bond forming rearrangements were detected, involving fluorine abstraction by the central atom, forming perfluorophenylene ions and neutral metal fluoride species. The heavier metals give simpler spectra and fragmentation schemes. The bulk of the ion current is carried by fluorocarbon ions for the silicon derivative and by organometallic or metal fluoride ions in the other three cases, SnF+ and PbF+ forming the base peaks in their spectra. When M is carbon in the compounds (C6F5)3COH and (C6F5)2CO, there is little evidence for rearrangements and transfer of fluorine to the central carbon atom.

Biological and Surface Properties of C-Type Virus Particles Produced by Novikoff Ascites Hepatoma Cells

1977 ◽  
Vol 35 ◽  
pp. 388-389
Author(s):  
D.C. Hixson ◽  
J.C. Chan ◽  
J.M. Bowen ◽  
E.F. Walborg
Keyword(s):  
Surface Properties ◽  
Ricinus Communis ◽  
Rat Kidney ◽  
Leukemia Virus ◽  
Viral Envelope ◽  
Virus Particles ◽  
Chemically Induced ◽  
Sarcoma Virus ◽  
Hepatocarcinoma Cells ◽  
Type C

Several years ago Karasaki (1) reported the production of type C virus particles by Novikoff ascites hepatocarcinoma cells. More recently, Weinstein (2) has reported the presence of type C virus particles in cell cultures derived from transplantable and primary hepatocellular carcinomas. To date, the biological function of these virus and their significance in chemically induced hepatocarcinogenesis are unknown. The present studies were initiated to determine a possible role for type C virus particles in chemically induced hepatocarcinogenesis. This communication describes results of studies on the biological and surface properties of type C virus associated with Novikoff hepatocarcinoma cells.Ecotropic and xenotropic murine leukemia virus (MuLV) activity in ascitic fluid of Novikoff tumor-bearing rats was assayed in murine sarcoma virus transformed S+L- mouse cells and S+L- mink cells, respectively. The presence of sarcoma virus activity was assayed in non-virus-producing normal rat kidney (NRK) cells. Ferritin conjugates of concanavalin A (Fer-Con wheat germ agglutinin (Fer-WGA), and Ricinus communis agglutinins I and II (Fer-RCAI and Fer-RCAII) were used to probe the structure and topography of saccharide determinants present on the viral envelope.

Recent Studies on a Murine Leukemia Virus Grown in Tissue Culture

1967 ◽  
Vol 25 ◽  
pp. 106-107
Author(s):  
L. Z. de Tkaczevski ◽  
E. de Harven ◽  
C. Friend
Keyword(s):  
Tissue Culture ◽  
Solid Tumors ◽  
Murine Leukemia Virus ◽  
Leukemia Virus ◽  
Supernatant Fluid ◽  
Virus Particles ◽  
Friend Leukemia ◽  
Type C ◽  
Leukemia Viruses ◽  
Murine Leukemia

Despite extensive studies, the correlation between the morphology and pathogenicity of murine leukemia viruses (MLV) has not yet been clarified. The virus particles found in the plasma of leukemic mice belong to 2 distinct groups, 1 or 2% of them being enveloped A particles and the vast majority being of type C. It is generally believed that these 2 types of particles represent different phases in the development of the same virus. Particles of type A have been thought to be an earlier form of type C particles. One of the tissue culture lines established from Friend leukemia solid tumors has provided the material for the present study. The supernatant fluid of the line designated C-1A contains an almost pure population of A particles as illustrated in Figure 1. The ratio is, therefore, the reverse of what is unvariably observed in the plasma of leukemic mice where C particles predominate.

Spontaneous Production of Type C Virus Particles in a Culture Derived from Rat Embryo Cells

1972 ◽  
Vol 30 ◽  
pp. 288-289
Author(s):  
Elizabeth S. Priori ◽  
T. Shigematsu ◽  
B. Myers ◽  
L. Dmochowski
Keyword(s):  
Virus Particle ◽  
Mouse Embryo ◽  
Calf Serum ◽  
Embryo Cell ◽  
Virus Particles ◽  
Extracellular Virus ◽  
Mouse Embryo Cell ◽  
Mature Virus Particle ◽  
Embryo Cells ◽  
Type C

Spontaneous release of type C virus particles in long-term cultures of mouse embryo cells as well as induction of similar particles in mouse embryo cell cultures with IUDR or BUDR have been reported. The presence of type C virus particles in cultures of normal rat embryos has not been reported.NB-1, a culture derived from embryos of a New Zealand Black (NB) rat (rats obtained from Mr. Samuel M. Poiley, N.C.I., Bethesda, Md.) and grown in McCoy's 5A medium supplemented with 20% fetal calf serum was passaged weekly. Extracellular virus particles similar to murine leukemia particles appeared in the 22nd subculture. General appearance of cells in passage 23 is shown in Fig. 1. Two budding figures and one immature type C virus particle may be seen in Fig. 2. The virus particles and budding were present in all further passages examined (currently passage 39). Various stages of budding are shown in Figs. 3a,b,c,d. Appearance of a mature virus particle is shown in Fig. 4.

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