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1

Digitale Medien

Synthesis of some highly brominated naphthalenes (1981)

McKinney, J. ; Singh, P. ; Levy, L. ; [weitere]

s.l. : American Chemical Society

Journal of agricultural and food chemistry 29 (1981), S. 180-183

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ISSN: 1520-5118

Quelle: ACS Legacy Archives

Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/jf00103a045

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2

Digitale Medien

Role of the Popliteal Lymph Node in Infection with Mycobacterium marinum of the Hind Footpad of the Mouse, and Source of the Cells that Characterize the Process (1982)

MOR, N. ; LUTSKY, I. ; LEVY, L.

Oxford, UK : Blackwell Publishing Ltd

Scandinavian journal of immunology 15 (1982), S. 0

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ISSN: 1365-3083

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Medizin

Notizen: We examined the possibility that the popliteal lymph node serves as the source of the lymphocytes that, together with macrophages, characterize Ihc lesion produced by infection with Mycobacterium marinum in the hind footpad of Ihc mouse. Naive mice were partially protected against challenge with M. marinum in the hind footpad by intravenous infusion of lymphoc) its harvested from the popliteal nodes of donor mice infected with M. marinum 7 days earlier. Lymphocytes harvested from the popliteal nodes of infected donors, labelled in vitro with 3H-uridine, and infused intravenously into naive mice that were immediately challenged in the hind footpads with M. marinum, localized in the popliteal nodes of the recipient mice but nol in the footpad lesions. Lymphocytes harvested from the spleens of naive donors and labelled in vitro appeared to home to the popliteal nude draining the M. marinum-infected footpad. Thus, the primary rule of the popliteal lymph node appeared to be passive trapping of the lymphocytes brought to it by the circulairon or afferent lymphatics. We then tried lo locate the sources of bolh lymphocytes and macrophages that characterize the lesion. Temporary occlusion of the abdominal aorta prevented labelling by intravenously infused 3H-thymidine (3H-TdR) of the mononuclear cells of both footpad lesion and popliteal node. Temporary occlusion of the left common iliac artery during 3H-TdR infusion prevented immediate labelling on the ipsilateral side. After 24 and 48 h, however, small numbers of labelled lymphocyles were found in the left hind footpad lesion. Amputation of the right leg at the hip joint, but run right poplitial lymphadenectomy, performed immediately after re-estublishment of patency of the left common iliac artery, prevented the late influx of labelled lymphocytes into the lesion of the left hind footpad. Thus, the chief source of both the lymphocytes and the macrophages of the footpad lesion appeared lo be the lesion ilself.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1365-3083.1982.tb00668.x

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3

Digitale Medien

Isolation of a feline leukaemia provirus containing the oncogene myc from a feline lymphosarcoma (1984)

Levy, L. S. ; Gardner, M. B. ; Casey, J. W.

[s.l.] : Nature Publishing Group

Nature 308 (1984), S. 853-856

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The sequence arrangement of the feline c-myc locus was examined by Southern blot analysis6 of DNA from 25 FeLV-positive and 6 FeLV-negative pathologically characterized, naturally occurring feline lymphomas and corresponding normal tissues. Hybridization to Southern blots with a radiolabelled ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/308853a0

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4

Digitale Medien

Determination of Ascorbic Acid in the Presence of Sulphur Dioxide (1943)

LEVY, L. F.

[s.l.] : Nature Publishing Group

Nature 152 (1943), S. 599-599

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] WHEN an equal volume of 3 per cent hydrogen peroxide is added to a slightly acidified ascorbic acid solution, no appreciable effect on the indophenol titration value is observed, unless iron or copper salts are present. The end-point is a permanent pink colour deepening very slowly on standing. ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/152599c0

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5

Digitale Medien

A Specific Reaction for Ascorbic Acid (1943)

LEVY, L. F.

[s.l.] : Nature Publishing Group

Nature 152 (1943), S. 693-693

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] ON adding hydrochloric acid to a solution of ascorbic acid, reversible oxidation with 2: 6-dichloro-phenolindophenol and iodine becomes progressively slower as the mineral acid content increases. When the hydrochloric acid concentration reaches 20 percent in the case of indophenol and 29 per ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/152693a0

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6

Digitale Medien

Zur Bestimmung des Titans (1901)

Chatard, Th. M. ; Hillebrand, W. F. ; Dunnington ; [weitere]

Springer

Fresenius' Zeitschrift für analytische Chemie 40 (1901), S. 799-811

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ISSN: 1618-2650

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01345207

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7

Digitale Medien

A study of the electron impact induced retro-diels-alder process with selected 5,6,6a, 7,12,12a-hexahydrobenzo[a]anthracenes (1984)

Bobenrieth, M.-J. ; Levy, L. A. ; Hass, J. R.

Chichester : Wiley-Blackwell

Biological Mass Spectrometry 19 (1984), S. 153-159

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ISSN: 0030-493X

Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The mass spectra of 5,6,6a,7,12,12a-hexahydrobenzo[a]anthracene and 2-methoxy, 3-methoxy-, 4-methoxy and 1-methyl-4-methoxy derivatives are reported. Among the fragment ions observed under electron impact ionization, [C8H8]+· and [M—C8H8]+· can be generated by a retro-Diels-Alder process. Studies of metastable ion reactions show these ions to be formed by fragmentation directly from the molecular ion. The CA spectra of the [C8H8]+· ions from the subject compounds were compared with spectra from ions of the same composition from various sources. From these data, kinetic energy release measurements and stereochemical considerations, it is concluded that these ions are formed by a stepwise, rather than a concerted mechanism.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/oms.1210190402

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