Die Bedeutung der Urnierenkan�lchen f�r die Entwicklung des Wolffschen Ganges beim H�hnchen

Wendler, D

doi:10.1007/bf00521976

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…But confined phonons do not form a complete set of modes, IF phonons have to be included as well. They remove the reduction to a large extent, as has been demonstrated in [45]. The reduced scattering rates from phonons in QWs were used in [73,74] [79].…”

Section: Free Carrier Scatteringmentioning

confidence: 99%

“…The reduced scattering rates from phonons in QWs were used in [73,74] [79]. In this subsection we will review some theoretical results obtained in [45] on free carrier scattering rates from optical phonons in a single QW. Frohlich interaction is considered only, The electron envelope wave functions parallel to z are taken as sine expressions sin (nxz/dl) with n being the confinement quantum number.…”

Section: Free Carrier Scatteringmentioning

confidence: 99%

“…It is scattered to a certain wave vector k;, and subband n' by emitting an optical phonon of in-plane wave vector q and branch r. The total scattering rate W ( E ) for an electron of kinetic energy E = (h2/2m,*) kfi is given by the expression where S,,,(Q, kll, kfIl) means the scattering amplitude. Expression (99) has been evaluated in [45] for three GaAs QWs of different widths but equal barrier compositions (A10,2s . Ga,,,,As).…”

Section: Free Carrier Scatteringmentioning

confidence: 99%

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Optical Phonons in Superlattices

Enderlein¹,

Suisky²,

Röseler³

1991

Physica Status Solidi (b)

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Section: Free Carrier Scatteringmentioning

confidence: 99%

Section: Free Carrier Scatteringmentioning

confidence: 99%

Section: Free Carrier Scatteringmentioning

confidence: 99%

See 1 more Smart Citation

Optical Phonons in Superlattices

Enderlein¹,

Suisky²,

Röseler³

1991

Physica Status Solidi (b)

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Ontogeny of calbindin-D28K and calretinin in developing chick kidney

1995

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The ontogeny of two calcium-binding proteins (calbindin-D28k and calretinin) was studied by immunohistochemical techniques in developing chick kidney. This study showed the presence of calbindin on the 5th incubation day and calretinin on the 7th incubation day in mesonephric distal and connecting tubules, and in the medial wall of the Wolffian duct. At later stages, immunostaining for these two proteins, in particular for calretinin, was also demonstrated in some metanephric proximal tubules. Glomeruli and Bowman's capsules were negative both in the mesonephros and metanephros. The presence of calretinin in the developing kidney has thus been demonstrated for the first time. The early expression of calbindin and calretinin in mesonephric distal tubules suggests their role in regulating the final excretion of calcium. The different patterns of immunoreactivity of the walls of the Wolffian duct can be correlated with their different histogenetic and histological features.

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Etude chez les oiseaux de 1’influence du mésenchyme néphrogène sur le canal de Wolff à l’aide d’associations hétérospécifiques

Martin¹

1976

Development

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A study of the influence of mesonephric mesenchyme on the Wolffian duct in birds using heterospecific associations An in ovo experimental study of mesonephric mesenchyme—Wolffian duct relationships has been performed with special reference to the progression and the ramification of the Wolffian duct in quail—chick and quail—duck associations. Two methods are used to obtain chimaeric mesonephros in ovo. First, a piece of a quail blastoderm containing the tip of the Wolffian duct is grafted on to a chick blastoderm behind an obstacle. The obstacle is a small piece of shell membrane and it prevents the migration of the chick Wolffian duct. Second, chimaeric blastoderms are made by associating in ovo halves of quail blastoderm (anterior or posterior) with the complementary halves of chick or of duck blastoderms. The experiments are performed in such a way that the Wolffian ducts are in the anterior part and the nephrogenic blastemas in the posterior part. In those experiments in which a Wolffian duct of one species is associated with the mesonephric mesenchyme of another, the Wolffian duct grows backward above the intermediate cell mass without any participation of the heterospecific cells. In quail-duck associations, the Wolffian duct reaches the cloaca and buds off the ureteric diverticulum later than it does in quail—chick associations. The mesonephric mesenchymal area induces the Wolffian duct to branch out into a collecing system. Quail Wolffian duct gives rise to more numerous collecting tubules than does the chick Wolffian duct. In quail mesenchyme—chick Wolffian duct mesonephros, the collecting tubules are not always present and often the tubules derived from the mesenchyme invade the wall of the Wolffian duct. In all cases only very short collecting tubules are derived from the Wolffian duct.

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Die Bedeutung der Urnierenkan�lchen f�r die Entwicklung des Wolffschen Ganges beim H�hnchen

Cited by 3 publications

References 16 publications

Optical Phonons in Superlattices

Optical Phonons in Superlattices

Ontogeny of calbindin-D28K and calretinin in developing chick kidney

Etude chez les oiseaux de 1’influence du mésenchyme néphrogène sur le canal de Wolff à l’aide d’associations hétérospécifiques

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