Results 281 to 290 of about 7,672,439 (332)
Some of the next articles are maybe not open access.
The measurement of packing and contraction in chromosomes
Chromosoma, 1939The observations of lengths of chromosomes in salivary glands at pachytene and in mitotic and meiotic metaphases are consistent with the observed coiling of the chromosomes in mitosis and meiosis in plants, animals and Protista, and with the doubly-refractive properties of the chromomeres and chromosomes, on various possible assumptions with regard to ...
C. D. Darlington, M. B. Upcott
openaire +1 more source
Radiography Measurements of Particle Packing
Nature, 1969Measurements of particle packing by radiography have been analysed in terms of a general geometrical model.
J. R. F. ARTHUR, T. DUNSTAN
openaire +1 more source
Measurement of Packing and Spacing of Photoreceptors
Imaging and Applied Optics, 2011We developed two automated methods for measuring the hexagon size and the fraction of hexagonally packed cones. Density is mostly set by adjacent cones, decreasing with eccentricity. High frequencies are also being sampled in the periphery.
Nizan Meitav, Erez N. Ribak
openaire +1 more source
Optically-measured and packed volume of lupine mitochondria
Archives of Biochemistry and Biophysics, 1960Abstract Results are reported of experiments measuring the optical density, packed volume, swelling rates, and succinoxidase activity of lupine mitochondria under different osmotic conditions. The optically measured volume (1/O.D.) of mitochondria, with succinate and ATP added, varied inversely with osmolar concentration except for mitochondria ...
S I, HONDA, A M, MUENSTER
openaire +2 more sources
Measurement of Packing Tortuosity and Porosity in Capillary Electrochromatography
Analytical Chemistry, 2002The application of conductivity measurements for packing structure characterization has been extended to a column consisting of a packed section and an open section as typically used in capillary electrochromatography (CEC). Because of the difference in electric conductivity between the packed and open sections, the electric fields applied across the ...
Ligong, Chen +3 more
openaire +2 more sources
Measurements of ammonia and ammonium by denuder and filter pack
Atmospheric Environment, 1994Abstract Simultaneous 24-hour measurements of gaseous ammonia (NH3) and particulate ammonium (NH4+) by denuder and filter pack were carried out at five different locations in Denmark. The locations represent areas surrounded by different emission densities of NH3. In general a good agreement was found for the determination of the sum of NH3 plus NH4+
Andersen, H. V., Hovmand, M. F.
openaire +2 more sources
Packing measure of super separated iterated function systems
, 2018J. Reid
semanticscholar +1 more source
The packing measure and symmetric derivation basis measure
1992Let \(h\) be a continuous, increasing function defined on \(R\) such that \(f(0)=0\) and \(\delta: R^ n\to(0,\infty)\). Then for any \(E\subset R^ n\) it is defined \(H_ s(E)=\sup\{\sum_ i h(2r_ i)\mid (B(x_ i,r_ i))_ i\) is a sequence of pairwise disjoint balls in \(R^ n\), \(x_ i\in E\) and ...
openaire +2 more sources
Measuring the quality of packed foods
2006Measuring the quality of food is important for product and process optimization in order to avoid or food degradation as much as possible. This paper provides an overview of advanced analytical approaches in combination with food packaging research techniques to obtain insight in the key processes of food degradation.
Dongen, W.D. van, Jetten, J.
openaire +1 more source
The packing measure of the trajectories of multiparameter fractional Brownian motion
Mathematical Proceedings of the Cambridge Philosophical Society, 2003Yimin Xiao
semanticscholar +1 more source