abstract：:Maturing erythroblasts and erythrocytes were studied in chickens and adult hens to provide more information on the presence and frequency of various nucleolar types in these cells. Nucleoli were present at all stages of erythroblastic and erythrocytic development except in the case of a few reticulocytes and the matur...

journal_title：Cell and tissue research

authors： Likovský Z,Smetana K

更新日期：1975-09-17 00:00:00

abstract：:The vascularization of the hypothalamo-adenohypophysial region of the toad Bufo bufo (L.) (Amphibia, Anura) was studied by means of light- and scanning electron microscopy. Special attention was given to the portal vascular system of the median eminence and the pars distalis. Course and arrangement of these vessels ar...

journal_title：Cell and tissue research

authors： Lametschwandtner A,Simonsberger P

更新日期：1975-09-16 00:00:00

abstract：:Myelin formation in cultures of previously dissociated spinal cord from foetal mice is described. In addition to the expected pattern of myelination, in which axons are closely wrapped by myelin lamellae, redundant folds of myelin have been found, as have double sheaths surrounding a single axon. Hypotheses concerning...

journal_title：Cell and tissue research

authors： Bird M,James DW

更新日期：1975-09-16 00:00:00

abstract：:With an indirect immunofluorescence technique and an antiserum raised against synthetic LHRH, immunofluorescent granules were observed in fine radially oriented fibres in the palisade layer of the zoma externa in both the anterior and the posterior divisions of the median eminence in the greenfinch. There was no speci...

journal_title：Cell and tissue research

authors： Sharp PJ,Haase E,Fraser HM

更新日期：1975-09-16 00:00:00

abstract：:An improved technique for fluorescent labelling of heavy meromyosin has made it possible to detect on a light microscopic level the cellular sites of actin localization. Rabbit heavy meromyosin (HMM) was labelled with fluorescein isothiocyanate so that the actin binding site was protected during the reaction. The spec...

journal_title：Cell and tissue research

authors： Sanger JW

更新日期：1975-08-27 00:00:00

abstract：:The ultrastructure of the rectal papillae of the parasitoid hymenopteran, Nasonia vitripennis (Walk), is described. These organs in this insect consist of four distinct cell types arranged as a closed, hollow cone. The majority of the cells are present in the raised cone, and are characterised by large numbers of mito...

journal_title：Cell and tissue research

authors： Davies I,King PE

更新日期：1975-08-25 00:00:00

abstract：:Histological, histochemical, and electron microscopical investigations of the rat pancreas, one to five hours after pilocarpine injection (4 mg in 1 ml normal saline solution), showed different secretory responses in periinsular and apoinsular acinar cells. The responsiveness to parasympathetic stimulation is markedly...

journal_title：Cell and tissue research

authors： Putzke HP,Said F

更新日期：1975-08-01 00:00:00

abstract：:The fine structure of Heterophrys marina (Centrohelidia, Heliozoa) is described with special reference to centroplast structure, morphogenesis and "behavior" of kinetocysts (= axopodial granules which perform saltatory movement), and formation of organic spicules in a new type of organelle located in the plasma membra...

journal_title：Cell and tissue research

authors： Bardele CF

更新日期：1975-08-01 00:00:00

abstract：:Dorsal root ganglia of chick embryos were cultured for one to four weeks on Maximow-slides. Puromycin was added to cultures for a pulse of 30' in a dose of 100 mug/ml medium. Particular interest was given to the ultrastructural features of the glia-neuron relations. Puromycin caused a shrinkage of the glial processes ...

journal_title：Cell and tissue research

authors： Meller K,Waelsch M

更新日期：1975-07-23 00:00:00

abstract：:The distribution and structure of the ureteric nerves in a small series of mammals was compared with that previously demonstrated in the rat. There was marked interspecies variation in the extent to which the nerves penetrated the wall of the ureter and in the degree of development of the deep submucous plexus. In ani...

journal_title：Cell and tissue research

authors： Hoyes AD,Barber P,Martin BG

更新日期：1975-07-23 00:00:00

abstract：:1. Early oocytes of Platynereis dumerilii are found in clusters floating in the coelom. The oocytes of a cluster form a syncytium which is enveloped by several sheath cells. 2. At stage 2, only a single sheath cell per cluster remains, and it penetrates the group of rounded oocytes, enveloping each one of them. At sta...

journal_title：Cell and tissue research

authors： Fischer A

更新日期：1975-07-16 00:00:00

abstract：:To identify structures involved in the translocation of the synaptic vesicles towards the presynaptic membrane, an ultrastructural study has been undertaken by means of (1) the E-PTA stain and (2) the HMM-labeling procedure. Using serial sections of E-PTA stained nervous tissue, especially those made in transversal an...

journal_title：Cell and tissue research

authors： LeBeux YJ,Willemot J

更新日期：1975-06-27 00:00:00

abstract：:Changes in the ultrastructure of the toad epidermis during the moulting cycle are described on the basis of 17 skin preparations fixed in consecutive phases of the cycle. Our previous light microscopical findings that morphological changes are mainly restricted to a short period prior to and after shedding are confirm...

journal_title：Cell and tissue research

authors： Budtz PE,Larsen LO

更新日期：1975-06-24 00:00:00

abstract：:Neural lobes of rats subjected to dehydration by drinking 2% saline for four days were examined electron microscopically and compared to untreated controls. The ultrastructure of the blood vessels and the tissues surrounding them were examined and it was found that, although few exocytotic figures could be seen in eit...

journal_title：Cell and tissue research

authors： Livingston A

更新日期：1975-06-24 00:00:00

abstract：:With the use of tissue prepared by freeze-substitution and the unlabelled antibody enzyme technique, neurophysin and vasopressin were localized at the ultrastructural level in the pofterior pituitary and median eminence of the guinea pig. In the posterior pituitary neurophysin was found in the large neurosecretory gra...

journal_title：Cell and tissue research

authors： Silverman AJ,Zimmerman EA

更新日期：1975-06-13 00:00:00

abstract：:In the corpuscles of Stannius of sticklebacks and eels two cell types are described of presumably endocrine nature. The predominating type, comparable to the cells observed in other species, responds to variation in calcium content of the medium and possibly produces a hypocalcemic hormone. The second cell type is unr...

journal_title：Cell and tissue research

authors： Bonga SE,Greven JA

更新日期：1975-06-09 00:00:00

abstract：:The effects of thyroidectomy, adrenalectomy, and castration on the pars distalis of male Japanese quail, and of injection of LH-RH on sexually inactive females, were investigated by light and electron microscopy. Correlation between light and electron microscopy was attained by use of alternate thin and thick sections...

journal_title：Cell and tissue research

authors： Mikami S,Kurosu T,Farner DS

更新日期：1975-06-09 00:00:00

abstract：:Scanning electrom microscopy of the ventricular surface of the pars ventralis of the tuber cinereum of the frog Rana temporaria shows that it can be divided in (1) a dorsolateral area, characterized by the presence of very numerous large, solid, bulbous protrusions (2) a medial area, where the large bulbous structures...

journal_title：Cell and tissue research

authors： Dierickx K,De Waele G

更新日期：1975-05-27 00:00:00

abstract：:To further evaluate the role of autonomic ganglia in the regulation of pelvic visceral activity, the neural elements in the major pelvic ganglion of the male rat have been studied with histochemixal and electron microscopic techniques. The principal findings are that the ganglion is composed of cholinergic and adrener...

journal_title：Cell and tissue research

authors： Dail WG,Evan AP,Eason HR

更新日期：1975-05-27 00:00:00

abstract：:The pituitary gland of the flounder, Pleuronectes flesus, showed several unusual cytological features. Between the RPD and the PPD was a zone of cells that stained purple with Alcian blue--PAS--orange G. Many of these cells were apparently degenerating. In the PPD the strands and coils of presumptive STH cells showed ...

journal_title：Cell and tissue research

authors： Benjamin M

更新日期：1975-01-01 00:00:00

abstract：:Fluorescent (aminergic) fibers were demonstrated by the Falck-Hillarp technique in all parts of the neurohypophysis (NH) in the roach (Leuciscus rutilus). The fibers are very thin and few in number in the rostral (RNH) and proximal neurohypophysis (PNH) but slightly more numerous in the NH adjacent to the pars interme...

journal_title：Cell and tissue research

authors： Ekengren B

更新日期：1975-01-01 00:00:00

abstract：:A pressure device has been used to obtain information about the forces involved in the maintenance of the aggregated state of melanophores of the angelfish, Pterophyllum scalare. Single aggregated melanophores of isolated scales were submitted to mechanical compression with forces ranging from 50-320 mup. As a functio...

journal_title：Cell and tissue research

authors： Schliwa M,Bereiter-Hahn J

更新日期：1975-01-01 00:00:00

abstract：:The ultrastructure of the isolated glycerinated penis retractor muscle (PRM) of Helix pomatia was investigated. The diameter distributions of thick myofilaments from birbre cross sections in the relaxed, phasic contracted, tonic contracted, and in the catch state.s show that a characteristic filament spectrum is forme...

journal_title：Cell and tissue research

authors： Wabnitz RW

更新日期：1975-01-01 00:00:00

abstract：:Triad density relative to sarcomeres, size of T-system tubules, sarcomere length, muscle fiber diameter in native and fixed states, and size of myofibrils were measured in four straited muscle fiber types in Atlantic hagfishes (Myxine glutinosa, L.) of different sizes. Traids occur at A/I-injunctions in all fiber type...

journal_title：Cell and tissue research

authors： Korneliussen H,Nicolaysen K

更新日期：1975-01-01 00:00:00

abstract：:Gill lamellae of a bivalve Anodonta woodiana lauta (v. Martens) were observed by electron microscopy. The Anodonta gill wall consists of a single layer of epithelial cells, its basal lamina and the underlying connective tissue layer. It was confirmed that there is no true endothelium in the vessels and that the connec...

journal_title：Cell and tissue research

authors： Nakao T

更新日期：1975-01-01 00:00:00

abstract：:The fine structure of spermatids has been examined in Calliactis, Protanthea, Gonactinia and Parazoanthus (Cnidaria, Anthozoa). The sperm cells are relatively simple and lack distinct acrosomes. Their nuclei, spherical in the zoanthid, in the actinians are slendertipped cones. Condensation of the chromatin is interpre...

journal_title：Cell and tissue research

authors： Lyke EB,Robson EA

更新日期：1975-01-01 00:00:00