Distribution of 25 semi-volatile organic compounds of two urban lakes in Wuhan, China

In this study, the levels of 25 semi-volatile organic compounds (SVOCs) were measured in samples of water, suspended particulate matter (SPM) and sediment from two urban lakes in Wuhan, China. The total concentrations of 25 SVOCs varied from 529.4 to 2168.9 ng/L, 120.7 to 22543.7 ng/g dry weight and 1577.3 to 61579.6 ng/g dry wt. in water, SPM and sediment, respectively. The concentration of SVOCs in SPM was 9-10 times higher than that in water, and the concentration of SVOCs in sediment 1.5-2 times higher than that in SPM. The level of total SVOC25 in the samples from Moshuihu Lake was higher than that in Yuehu Lake. Among the 25 SVOCs, phthalate compounds were on the highest level in all observed samples ranging between 441.9-1831.2 ng/L, 116.3-17566.8 ng/g, dry wt. and 6432.8-48177.6 ng/g dry wt. in water, SPM and sediment, respectively. Bis(2-ethylhexyl)phthalate, the predominant component of the analyzed pollutants, was in the range from 246.7 to 537.5 ng/l, 51.2 to 15540.0 ng/g dry wt. and 468.2 to 45010.3 ng/g dry wt. in water, SPM and sediment, respectively. The content of PAHs, dinitrotoluene and isophoton in sediment was higher than that in water and SPM at most of the locations. The possible sources of the pollutants and their inter-relation with human activities were discussed.

Resolución N° 246 del 2 de noviembre de 2007 ¿Cuáles son los criterios que tiene en cuenta la Cámara de Comercio para llevar a cabo el control de legalidad de la cesión de cuotas?

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Interleukin-17A stimulates granulocyte-macrophage colony-stimulating factor release by murine osteoblasts in the presence of 1,25-dihydroxyvitamin D(3) and inhibits murine osteoclast development in vitro

OBJECTIVE To investigate the effects of interleukin-17A (IL-17A) on osteoclastogenesis in vitro. METHODS Bone marrow cells (BMCs) were isolated from the excised tibia and femora of wild-type C57BL/6J mice, and osteoblasts were obtained by sequential digestion of the calvariae of ddY, C57BL/6J, and granulocyte-macrophage colony-stimulating factor-knockout (GM-CSF(-/-)) mice. Monocultures of BMCs or cocultures of BMCs and osteoblasts were supplemented with or without 1,25-dihydroxyvitamin D(3)(1,25[OH](2)D(3)), recombinant human macrophage colony-stimulating factor (M-CSF), RANKL, and IL-17A. After 5-6 days, the cultures were fixed with 4% paraformaldehyde and subsequently stained for the osteoclast marker enzyme tartrate-resistant acid phosphatase (TRAP). Osteoprotegerin (OPG) and GM-CSF expression were measured by enzyme-linked immunosorbent assay, and transcripts for RANK and RANKL were detected by real-time polymerase chain reaction. RESULTS In both culture systems, IL-17A alone did not affect the development of osteoclasts. However, the addition of IL-17A plus 1,25(OH)(2)D(3) to cocultures inhibited early osteoclast development within the first 3 days of culture and induced release of GM-CSF into the culture supernatants. Furthermore, in cocultures of GM-CSF(-/-) mouse osteoblasts and wild-type mouse BMCs, IL-17A did not affect osteoclast development, corroborating the role of GM-CSF as the mediator of the observed inhibition of osteoclastogenesis by IL-17A. CONCLUSION These findings suggest that IL-17A interferes with the differentiation of osteoclast precursors by inducing the release of GM-CSF from osteoblasts.

Na 1 Nachlass Max Horkheimer, 291 - Korrespondenzen u.a. mit Heinz Joachim Heydorn (p. V 82, 119-246)

3 Briefe zwischen Graf Lazy Henckel von Donnersmarck und Max Horkheimer, 1968; 2 Briefe zwischen Gräfin Nina Henckel von Donnersmarck und Max Horkheimer, 1968; 4 Briefe zwischen der Sängerin Carla Henius und Max Horkheimer, 1970-1971; 1 Brief an K. H. Hennings von Max Horkheimer, 1967; 4 Briefe zwischen Professor Wilhelm Hennis und Max Horkheimer, 1971; 1 Brief an Professor Dieter Henrich von Max Horkheimer, 1964; 2 Briefe zwischen Caroline Hergert und Max Horkheimer, 1970; 1 Brief von Professor Fred Herman an Max Horkheimer, 1959; 2 Briefe zwischen der Fachschülerin Dora Herrmann und Max Horkheimer, 1972; 2 Briefe zwischen Professor Franz Herrmann und Max Horkheimer, 1970; 6 Briefe zwischen Dr. phil. Gert-Julius Herrmann und Max Horkheimer, 1968; 2 Briefe zwischen Dipl. Kfm. Dr. Dr. Otto O. Herz und Max Horkheimer, 1969; 4 Briefe zwischen Professor und Museumsdirektor Erich Herzog und Max Horkheimer, 1970; 2 Briefe zwischen Hans Eberhard Hess und Max Horkheimer, 1970; 16 Briefe zwischen Professor Eugen Hess-Baer und Max Horkheimer, 1966-1971; 3 Briefe zwischen Karl Hess und Max Horkheimer, 1969-1971; 1 Drucksache von Pfarrer Walter Hess, 1971; 6 Briefe zwischen dem Bankier Walter Hesselbach und Max Horkheimer, 1971-1973; Drucksachen vom Hessischen Kreis, 1968; Briefe zwischen dem Hessischen Landesmuseum Darmstadt und Max Horkheimer, 1969; 25 Briefe zwischen Professor Heinz Joachim Heydorn und Max Horkheimer, 1965-1973; 2 Briefe zwischen Dr. Karl Heymann und Max Horkheimer, 1970; 1 Brief an den Hippokrates-Verlag von Max Horkheimer, 1971; 9 Briefe zwischen Walter Hirschmann und Max Horkheimer, 1969-1971;

Alan F. Chalmers, ¿Qué es esa cosa llamada ciencia? Una valoración de la naturaleza y el estatuto de la ciencia y sus métodos, segunda edición en español, revisada y ampliada (Madrid, Siglo XXI, traducción de E.Pérez Sedeño y P.López Mañez, 246 pp.)

Fil: Gaeta, Rodolfo Luján. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.