1,721,453 research outputs found
Untersuchungen am Lummer-Pringsheimschen Spektralflickerphotometer
No full textUNTERSUCHUNGEN AM LUMMER-PRINGSHEIMSCHEN SPEKTRALFLICKERPHOTOMETER
Full title: Zeitschrift für Psychologie und Physiologie der Sinnesorgane. II. Abteilung: Zeitschrift für Sinnesphysiologie (-)
Zeitschrift für Sinnesphysiologie (50) (a0001)
Untersuchungen am Lummer-Pringsheimschen Spektralflickerphotometer (50) (p0001
Lummer-Gehrcke interferometer
No full textTema ovog diplomskog rada je Lummer-Gehrckeov interferometar koji u istraživanjima iz optike i atomske fizike zauzima posebno mjesto zbog svoje izuzetne jednostavnosti i visoke moći razlučivanja. U prvom su dijelu diplomskog rada opisane fizičke osnove rada interferometara općenito. Posebno je obrađen Lummer-Gehrcke interferometar kao i njemu najsličniji Fabry-Perot interferometar, te je dana usporedba ova dva interferometra. U drugom dijelu su dani primjeri primjene u spektroskopskim istraživanjima fine i hiperfine strukture atomskih linija
Untersuchung der subzellulären Lokalisierung und der Funktion des RNA-Bindeproteins AtGRP7 mittels neuer photoschaltbarer Fluoreszenzproteine
No full textLummer M. Untersuchung der subzellulären Lokalisierung und der Funktion des RNA-Bindeproteins AtGRP7 mittels neuer photoschaltbarer Fluoreszenzproteine. Bielefeld; 2010
Christliches Verhalten eines Volks bey der Zerrüttung und Zerstörung seiner öffentlichen gemeinnützigen Anstalten : Eine Predigt welche statt der sonst gewöhnlichen Gedächtnißpredigt der Kirchenweihe in der Waysenhauskirche am Sonntage Rogate 1781. im Waysenhausgarten unterm freyen Himmel ... gehalten worden ist ... ; nebst einer kurzen Nachricht vom Zucht und Waysenhause
No full textvon Johann Gottlieb Lummer Prediger am Zucht und WaysenhauseFingerprint nach dem Ex. der FB Gotha und der ULB Sachsen-AnhaltVorlageform des Erscheinungsvermerks: Gera, gedruckt bey Heinrich Gottlieb Rothen. - Erscheinungsjahr nach der Datierung der Predig
Connecting litter quality, microbial community and nitrogen transfer mechanisms in decomposing litter mixtures
No full textSynergistic effects on decomposition in litter mixtures have been suggested to be due to the transfer of nitrogen from N-rich to N-poor species. However, the dominant pathway and the underlying mechanisms remain to be elucidated. We conducted an experiment to investigate and quantify the control mechanisms for nitrogen transfer between two litter species of contrasting nitrogen status (15N labeled and unlabeled Fagus sylvatica and Fraxinus excelsior) in presence and absence of micro-arthropods. We found that 15N was predominantly transferred actively aboveground by saprotrophic fungi, rather than belowground or passively by leaching. However, litter decomposition remained unaffected by N-dynamics and was poorly affected by micro-arthropods, suggesting that synergistic effects in litter mixtures depend on complex environmental interrelationships. Remarkably, more 15N was transferred from N-poor beech than N-rich ash litter. Moreover, the low transfer of 15N from ash litter was insensitive to destination species whereas the transfer of 15N from labeled beech litter to unlabeled beech was significantly greater than the amount of 15N transferred to unlabeled ash suggesting that processes of nitrogen transfer fundamentally differ between litter species of different nitrogen status. Microbial analyses suggest that nitrogen of N-rich litter is entirely controlled by bacteria that hamper nitrogen capture of microbes in the environment supporting the source-theory. In contrast, nitrogen of N-poor fungal dominated litter is less protected and transferable depending on the nitrogen status and the transfer capacity of the microbial community of the co-occurring litter species supporting the gradient-theory. Thus, our results challenge the traditional view regarding the role of N-rich litter in decomposing litter mixtures. We rather suggest that N-rich litter is only a poor nitrogen source, whereas N-poor litter, can act as an important nitrogen source in litter mixtures. Consequently both absolute and relative differences in initial litter C/N ratios of co-occurring litter species need to be considered for understanding nitrogen dynamics in decomposing litter mixtures
RNA-Protein-Interaktion im Rampenlicht
No full textLummer M, Schüttpelz M, Sauer M, Staiger D. RNA-Protein-Interaktion im Rampenlicht. BIOforum. 2009;6:28-30
Lummer Brodhun Contrast Photometer
No full textA device for presenting to the eye, with the sharpest possible boundary between them, two surfaces which are illuminated by two sources whose luminous intensities or chromaticities are to be compared. 001A is a Head in its usual form for photometry and colorimetry. 001B is a modified Head in which the external lens enables the observer to compare the luminance of a surface external to the Head with that of one side of the test plate of the Head; this modified Head was used with NBS 88-inch, reinforced concrete integrating sphere from the time of its construction in 1915 until the 1940s to make relative measurements of the sphere-window luminance when standards and test sources were operated in the sphere-the ratios of these luminances are equal to the ratios of the light outputs of the sources. Photometer heads like these were used to make practically all photometric measurements from the start of this century until the 1930s but then their use dropped sharply with the advent of photoelectric photometry and became negligible after the 1940s. (Used circa 1890, and superseded for photometry by photoelectric cells about 1940.)10 x 30 x 9 c
Effect of Background Intensity on Resolving Power of Lummer Gehrcke Plate and Transmission Echelon
No full textThis communication discusses the effect of background intensity on the resolving power of Lummer-Gehrcke plate and transmission echelon. A table and five figures illustrate the variation of resolving power with background intensity for various values of Ne and a
O. Lummer und E. Brodhun: Verwendung des Talbotschen Gesetzes in der Photometrie. (Photometrische Untersuchungen VI.) Zeitschr. f. Instrumentenkde. 1896. S. 299-307
No full textO. LUMMER UND E. BRODHUN: VERWENDUNG DES TALBOTSCHEN GESETZES IN DER PHOTOMETRIE. (PHOTOMETRISCHE UNTERSUCHUNGEN VI.) ZEITSCHR. F. INSTRUMENTENKDE. 1896. S. 299-307
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (-)
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (14) (a0006)
O. Lummer und E. Brodhun: Verwendung des Talbotschen Gesetzes in der Photometrie. (Photometrische Untersuchungen VI.) Zeitschr. f. Instrumentenkde. 1896. S. 299-307 (14) (p0306
Otto Lummer: Die Ziele der Leuchttechnik. Experimentalvortrag, gehalten am 19. März 1902 am Gesellschaftsabend des Elektrotechnischen Vereins zu Berlin. Elektrotechnische Zeitschrift 23 (35 u. 36). 1902
No full textOTTO LUMMER: DIE ZIELE DER LEUCHTTECHNIK. EXPERIMENTALVORTRAG, GEHALTEN AM 19. MÄRZ 1902 AM GESELLSCHAFTSABEND DES ELEKTROTECHNISCHEN VEREINS ZU BERLIN. ELEKTROTECHNISCHE ZEITSCHRIFT 23 (35 U. 36). 1902
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (-)
Zeitschrift für Psychologie und Physiologie der Sinnesorgane (32) (a0001)
Otto Lummer: Die Ziele der Leuchttechnik. Experimentalvortrag, gehalten am 19. März 1902 am Gesellschaftsabend des Elektrotechnischen Vereins zu Berlin. Elektrotechnische Zeitschrift 23 (35 u. 36). 1902 (32) (p0350
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