bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Tissue Distribution of la‐ and IgM‐Positive Cells in Adult and Newborn Miniature Pigs
Authors: Horák V. , Hruban V. , Dvořák P. 
Published: June 2007

SummaryDistribution of Ia‐ and IgM‐positive cells was compared in tissues of adult and newborn miniature pigs, using indirect immunoperoxidase and immunofluorescent techniques with monoclonal antibodies. The different distribution patterns were found mainly in adult jejunum and kidney. Both IgM‐ and Ia‐staining were ascertained in the lamina propria between the Lieberkühn crypts and m the lymphoid follicles of the jejunum. Moreover, IgM‐positive cells were demonstrated in the crypts while Ia‐reaction was seen in the lamina propria of the villi. In the kidney, IgM‐staining was limited to the glomeruli. On the contrary, a distinct Ia‐reaction was found mainly in intertubular structures. Small differences in IgM‐ and Ia‐positive cell distribution were also noted in the mesenteric lymph nodes and in the spleen. Developmental changes of the adult distribution patterns (chiefly that of IgM‐positive cells) were found in all tissues studied at 2 days of age.
Zur Wasseranpassung der Walhaut
Authors: Knospe C. 
Published: June 2007

SummaryOn the adaptation of whale skin to water Histological and histochemical studies of the dolphin (Delphinus delphis) and the porpoise (Phocaena phocaena)In the whale the superficial layer of the epidermis (stratum paracorneum) is incompletely cornified and is characterized by high contents of phospholipids, neutral fats, and glycoproteins. This finding, and especially the structure of the dermis (hypodermis) in relation to its function, are discussed as to the role they play in the adaptation of whales to the aquatic environment.
Cytological, Immunocytochemical and Ultrastructural Study of the Adenohypophyseal Pars Distalis of the Kid (Capra hircus): The TSH cell
Authors: Gomez M. A. , Navarro J. A. , Gomez S. , Camara P. , Gomez J. C. , Bernabé A. 
Published: June 2007

SummaryThe structure and ultrastructure of the adenohypophyseal pars distalis in kids of the Murciano‐granadiana breed (18 males and 12 females), aged 2–3 months and with an average carcass weight of 8 kg has been studied.Techniques of staining (Tetrachrome Herlant's, and Cleveland‐Wolfe) and histochemistry (PAS, PAS‐OG and BA‐PAS‐OG) contrasted with immunolabelling (PAP) have been used. In addition an ultrastructural study has been made and nucleus and cytoplasm, secretory granules, mitochondria and lysosomes have been measured with a semiautomatic image analyzer (IBAS‐1).TSH cells are found in sagittal section in the anterior area and in an antero‐caudodorsal band, and transversally in the ventral and medial region; they are 6% and their average size is 14.15 um. Ultrastructurally they are a single cellular type with spherical granules whose size is 195nm in males and 149 in females; these granules are characterized by a clear halo and a variable electronic density. The rough endoplasmic reticulum is found as slightly enlarged vesicles with a homogeneous and moderately electrodense content or in concentric stratifications.
El Desarrollo del Estómago del Vacuno: Análisis desde el Prisma Morfológico y Morfométrico Parte III: Reconstrucción Espacial y Morfometría
Authors: Vivo J. M. , Robina A. 
Published: June 2007

SummaryOn the Development of the Bovine Stomach: A Morphological and Morphometric Analysis. Part III. Spatial ReconstructionThis work represents a summary of the study presented in parts I and II, previously published in this journal. The data collected in those studies is presented in three dimensional reconstructions of the stomach of the developing calf.
Innervation of the Canine Cruciate Ligaments
Authors: Yahia L. H. , Newman N. M. , St‐Georges M. 
Published: June 2007

SummaryA search for mechanoreceptors within the substance of the cruciate ligaments was undertaken using the modified gold‐chloride technique. Abundant Pacinian, Vater‐Pacini, Ruffini end organs and Ruffini‐type receptors were found within the substance of the anterior and posterior cruciates. The receptors were innervated by axons of 5 to 10 micrometers in diameter penetrating from the synovium investing the ligaments. The findings support the contention that the cruciate ligaments have important mechanoreceptive and proprioceptive functions.
Enhanced Proliferation of Undifferentiated Spermatogonia after Treatment of Short Photoperiod Exposure in the Syrian Hamster, Mesocricetus auratus
Authors: Tiba T. , Takahashi M. , Igura M. , Kita I. 
Published: June 2007

SummaryFive Syrian hamsters were exposed to a short photoperiod (8L:16D) during 159 days. Atrophied testes were removed, fixed in Allen's solution; paraffin sections of the testicular tissues and whole‐mounted seminiferous tubules were prepared. The numbers of various types of spermatogonia were investigated and compared with those in animals maintained in natural photoperiod (12L: 12D). All the types of differentiated spermatogonia (A1, A2, In, B1, B2) were significantly decreased in number after the treatment of short photoperiod exposure, while undifferentiated spermatogonia (isolated, paired and aligned type) were significantly increased at stages V–VI and VII–VIII of the seminiferous epithelial cycle. This strictly local reaction of the undifferentiated spermatogonia to the loss of the differentiated spermatogonia suggests the presence of a feedback effect of a certain type(s) of differentiated cells to the undifferentiated spermatogonia! proliferation. This feedback mechanism may also play an important role for regulating annual changes in spermatogenesis of seasonal breeders, not only in laboratory but also in natural habitat.
An Ultrastructural Study of the Sertoli Cell in the Water Buffalo (Bubalus bubalis)
Authors: Kurohmaru M. , Yamashiro S. , Azmi T. I. , Basrur P. K. 
Published: June 2007

SummaryThe ultrastructure of Sertoli cell in the water buffalo (Bubalus bubalis) was observed in a transmission electron microscope. The nucleus had homogeneous nucleoplasm, scarce heterochro‐matin and multivesicular nuclear body (MNB). The MNB was composed of numerous vesicles and ribosome‐like dense structures. The vesicles varied in size and number and contained a sparse and flocculent substance. In the indentation of the nucleus, aggregates of ribosomes were frequently observed. In the apical and middle region of the cell, long mitochondria and microtubules were distributed parallel to the long axis of the cell. Non‐laminated smooth ER and some ribosomes were also recognizable throughout this region. In the basal region, widely‐distributed laminated smooth ER was characteristic. Microfilament bundles at ectoplasmic specialization were irregularly arranged. Frequently‐emerged nodular processes occasionally separated from basal lamina and formed round structures within Sertoli cytoplasm. Although these characteristics of buffalo Sertoli cell were very similar to those of the bovine studied, the aggregate of ribosomes was more developed in the buffalo.
Comparative Structure and Morphology of the Goat Sternum in West African Dwarf and Danish Landrace Breeds
Authors: Mgasa M. N. , Arnbjerg J. 
Published: June 2007

SummaryThe structure and morphology of the sternum from 33 West African dwarf (WAD) and sixteen Danish Landrace breed goats were studied radiographically. In young kids of the Danish Landrace breed (DL), the number of sternal elements (Sternebrae) was six or seven with the fifth or the last but one being double in some animals due to bilateral bodies. All the sternal elements in the WAD breed appeared to have each a single locus of ossification and the number of sternal elements varied between 5, 6 or 7 at birth. In those goats with 5 or 6 sternal segments, bilateral indentations were observed on the left and right side on either the last or the last two segments. These indentations were considered to indicate a prenatal cranial coalescence of the last segments leading to the reduced number of sternebra. The structure and morphology of the sternum in neonatal kids for the two breeds appears to be basically different. 8 sternal and 5 asternal ribs were observed in animals of both breeds. The cartilaginous attachments of the ribs on the sternal segments were variable. A floating rib was also observed in one of the WAD goats. The comparative structure and morphology of other ruminant sternum is also discussed.
Entwicklung und Zelldifferenzierung des Nucleus motorius nervi facialis beim Rind*
Authors: Ruhrig Sabine , Hummel Gerhard , Hild Anne , Goller Hermann 
Published: June 2007

SummaryDevelopment and cellular differentiation of the neurons of the motoric nucleus facialis in the bovineThe early development, cell‐migration and cell‐differentiation of the nucleus motorius nervi facialis were studied in 32 bovine embryos with a CRL of 1 to 53 cm by light microscopical techniques. The ventro‐medial cell column, a transitory embryonic formation, can be regarded as the origin of the nucleus. From there migrating cells can be demonstrated up to a CRL of 2.7 cm. With 3.8 cm CRL the cells are confined to their definitive location. From 5 cm CRL onwards a subdivision into 4 subnuclei can be seen. By succeeding maturation processes the nucleus of fetusses with 53 CRL acquires the topographical and cellular appearance of mature animals.With the electron microscope the cell‐differentiation of the early stages (2.5 and 3.6cm CRL) was demonstrated. Additionally the ventro‐medial cell column was studied. The vertical columnar organisation of the neurons of the nucleus facialis shows besides longitudinal orientated guiding structures the migration process which is taken place at a CRL of 2.5 cm. Synaptogenic cell contact are seen from 3.6 cm SSL. At this stage the migration of cells has come to an end.
Die Heterogenität des vaskulären Endothels*
Authors: Plendl Johanna , Sinowatz Fred , Auerbach Robert 
Published: June 2007

SummaryHeterogeneity of the vascular endotheliumThe vascular endothelium has long been considered to be a homogeneous cell type. It is only recently that its remarkable heterogeneity has been shown. The selective and organ‐specific adhesion of cells of the immune system, of metastasizing tumor cells and of microorganisms underscores the central position of the endothelium between the circulation and each organ.The use of antibodies and lectins led to the recognition of species‐, organ‐, and age‐specific endothelial cell surface receptors.Identification of the endothelial adhesion molecules and ‐mechanisms, which are part of the “endothelial organ‐ and tissue address” would lead to the possibility of blocking the adhesion of cells, such as e. g. tumor cells.
Studies on the Parietal Region of the Cervid Skull
Authors: Kierdorf U. , Kierdorf H. 
Published: June 2007

SummaryIn contrast to the situation in roe deer (Kierdorf and Kierdorf, in press) and other cervid species, an os interparietals was missing in the fallow deer cranium. Absence of this skull element in Dama dama is regarded as an apomorphic character state. The area covered by the interparietals in Capreolus was occupied by the parietals in Dama. This condition (loss of interparietals, enlargement of parietals) is in accord with a trend seen in vertebrate evolution, that is, progressive reduction in the number of skull elements concomitant with enlargement of the remaining bones. Synostosis of the parietals in Dama started a few days post partum and was completed at about 7 to 8 months of age. In males, obliteration of the sutura parietooccipitalis commenced in adult life, whereas in females only closure of the central region of this suture was occasionally observed.
Use of Monoclonal Antibodies for Immunohistochemical Study of Bovine Lymph Nodes on Frozen Sections
Authors: Delverdier M. , Abella N. , Schelcher F. , Pradeau P. , Espinasse J. , Cabanie Et P. 
Published: June 2007

SummaryMany monoclonal antibodies reactive with bovine leukocyte differentiation antigens are now available. Immunohistochemical staining on frozen sections using these monoclonal antibodies permits study of the functional morphology of bovine lymph nodes. Our study confirms usually accepted notions (B and T dependent‐zones) and supplies complementary data about the repartition of CD4 cells (particularly intrafollicular positive cells), yb T cells, MHC II expression and dendritic leukocytes.
Ultrastructure of the Rete testis in the Cat (Felis domestica, L.)*
Authors: Viotto M.J.S. , Orsi A.M. , Vicentini C.A. , Dias S.Mello , Gregório E.A. 
Published: June 2007

SummaryThe rete testis (RT) in the cat comprises three distinct and sequential parts: septal or adlobular; mediastinal and tunical parts. This last part is followed by the small extratesticular rete testis. The whole of the RT tubules and/or channels is lined by single low columnar and/or cuboidal epithelium with ultrastructural peculiarities of secretory and absorptive functions. The Golgi apparatus polarity (cis‐trans surfaces), its relation with the long profiles of the ER, mainly with the rough ER, and presence of apical uncoated electrondense granules are suggestive of active release of macromolecules, probably glycoproteins. The absorptive function is proposed through the observation of a conspicuous microvacuolar‐vesicular apical complex in epithelial cells. Moreover spermatozoa phagocytosis is also noticed, mainly in the septal part of the RT.
Retinal Photoreceptor Fine Structure in the Red‐Tailed Hawk (Buteo jamaicensis)
Authors: Braekevelt C. R. 
Published: June 2007

SummaryThe retinal photoreceptors of the red‐tailed hawk (Buteo jamaicensis) consist of rods, single cones and double (unequal) cones present in a ratio of about 2: 11 5. In the light‐adapted state, the rods are slender elongated cells with outer segments that reach to the retinal epithelial (RPE) cells. The inner segment displays an ellipsoid of mitochondria, plentiful polysomes, some rough ER and Golgi zones. The rod nucleus is located deep within the outer nuclear layer and the synaptic spherule displays both invaginated (ribbon) and superficial (conventional) synaptic sites. Single cones show a thin tapering outer segment, a large electron lucent oil droplet at the apex of the inner segment and an ellipsoid of mitochondria. Double cones consist of a larger chief member which displays a thin tapering outer segment and an electron dense oil droplet as well as a smaller accessory cone which shows no oil droplet, an ellipsoid and a paraboloid of glycogen. As in the single cone, polysomes, RER and Golgi zones are also noted in the inner segments of both members of the double cone. Near the external limiting membrane the chief and accessory cones show membrane specializations indicative of junctions on their contiguous surfaces. All cone photoreceptors are of a smaller diameter than is normally reported for avian species. Both single and double cones display several invaginated synapses as well as numerous superficial synaptic sites.
The Arterial System of the Wood Mouse, Apodemus sylvaticus: The Pelvic Region
Authors: Fuster M. J. Lopez , Ventura J. , Gispert E. 
Published: June 2007

SummaryIn this paper we describe the origin, arrangement and variations of the major pelvic arterial trunks in the wood mouse, Apodemus sylvaticus. Seventy‐six specimens have been analyzed by injection of coloured latex solution through the left ventricle of the heart and subsequent dissection of the pelvic region. Measurements of the origin of the major arterial trunks have been performed taking into account the number of anterior and posterior branches arising from its origin. Only the values of the internal iliac artery and the pudendoepigastric trunk show significant differences according to the number of previous branches. In general terms, the pattern of the pelvic arteries in the wood mouse agrees with those reported to for other rodent species. Nevertheless, some differences have been detected, especially in the origin of the major arterial trunks and the constitution of the internal iliac
Influence du Cadmium sur l;Intestin de Carassius Auratus
Authors: Andreozzi G. , Antonucci R. , Affatato C. , Gargiulo G. , Battaglini P. 
Published: June 2007

SummaryThe influence of cadmium on Carassius auratus gut.The paper deals with the cadmium effects on the intestinal mucosa of adult Carassius auratus after 7, 14 and 40 days of exposure. After 7 days the mucosa becomes oedematous; the mucous cells show intensive secretion.The cells showing immunoreactivity for the Met‐ and Leuenkephaline miss this feature.After 14 days these modifications diminish and after 40 days disappear completely and the mucosa gains its normal characteristics.
Fiber Types Distribution in the Digastric Muscle of Tufted Capuchin Monkey (Cebus apella)
Authors: Andreo J. C. , Pai V. D. , Navarro J. A. C. , DE Oliveira J. A. 
Published: June 2007

SummaryFiber types distribution in the diagastric muscle of tufted capuchin monkey was studied by means of NADH‐TR, myosin‐ATPase, after alkaline and acid preincubations and SDH histochemical reactions. Three different types of fibers were found presenting an equal distribution. The percentage and types of fibers were as follow: 18.2 % SO (Slow Oxydative), 38.4 % FOG (Fast Oxydative Glycolytic) and 43.4 % FG (Fast Glycolytic). FG fibers revealed the largest area. The relatively high concentration of fast twitch (81.2 %) seems to indicate this muscle is involved with the acceleration and fast speed of jaw movements. Aerobic metabolism represented by SO + FOG fibers (56.6 %) suggestes that this muscle possesses an additional role than that related to the lowering of the jaw.
The Anatomic Features of the Normal Tarsus of the Live Horse as Perceived by the Sense of Sight
Authors: McCarthy P. H. 
Published: June 2007

SummaryA description is given of 75 features present in the normal tarsus of the standing horse which are apparent due to visible skin contours overlying them. Depending on whether or not the pelvic limb is supporting full weight or resting, some contours alter their configuration. Therefore the contour of each underlying feature is described separately for each stance of the limb. It is considered that visual inspection and identification of the apparent superficial features of the normal equine tarsus form the basis of orientation and clinical inspection. Furthermore, these features provide reference points for procedures associated with surgery, arthroscopy, intraarticular treatment and anesthesia of a horse's tarsus suspected of being injured or infected.
Analysis of the Pituitary‐Thyroid Axis in Bilaterally Adrenalectomized or Adrenal Transplanted Rats
Authors: Sarria R. , Losada J. , Oliver F. Donate 
Published: June 2007

SummaryThe percentage, distribution, shape, intensity of staining and morphometrical parameters of the pituitary TSH immunoreactive cells and the histological features of the thyroid glands, were compared between adult rats with intact adrenals, without adrenals and biadrenalectomized animals with neonatal adrenal grafts. After the removal of the adrenal glands, TSH immunoreactive cells increased in percentage and exhibited a higher complexity of the cellular outline, than that of the intact animals. The nuclear, cytoplasmic and cell areas were significantly increased. However the bigger enhancement of the cytoplasmic area relative to the nuclear area, produced a decrease in the nuclear/cell area ratio. The thyroid glands showed some histological evidences of activation. After the transplantation of neonatal adrenal glands to adult rats, several adrenocortical nodules were present in the lumen of the small bowel segment. These adrenal masses induced a great decrease in the TSH cell area, which coupled with a smaller but significant variation of the nuclear area, led to an increase in the nuclear/cell area ratio relative to that observed in adrenalectomized animals. In addition, the distribution, shape and intensity of the immunoreactive material was similar to that observed in intact animals. In this experimental group, thyroid histology was observed to be similar to that of the intact animals.
The Poll Glands of the Dromedary (Camelus dromedarius): Ultrastructural Characteristics
Authors: Taha A. A. M. , Abdel‐Magied E. M. , Abdalla M. A. , Abdalla A. B. 
Published: June 2007

SummaryThe poll glands of the camel are tubuloalveolar glands. They consist of lobules separated by interlobular connective tissue. Adrenergic axons and blood vessels including fenestrated capillaries are present in the intralobular connective tissue in close proximity to the secretory cells. The prominent features of the secretory cell cytoplasm are many mitochondria, smooth endoplasmic reticulum, and many vesicles in various secretory stages.It is concluded that the secretory cells have apocrine as well as merocrine modes of secretion. The glands may have the ability to uptake hormones and concentrate them. Additional work is needed before considering these glands as steroid‐secreting glands.
Consequences of Selection on Muscle Composition. A Comparative Study on Gracilis Muscle in Wild and Domestic Pigs
Authors: Weiler U. , Appell H.‐J. , Kremser M. , Hofäcker S. , Claus R. 
Published: June 2007

SummaryEuropean domestic pigs are derived from the European wild pig by genetic selection and differ in their muscular‐growth ability. Thus, it was the aim of this study to investigate the consequences of genetic selection on muscle composition and fibre size in the gracilis muscle. Fibre typing based on the ATPase reaction revealed that this muscle in wild pigs is composed mainly of type‐I and ‐IIa fibres, whereas, in domestic pigs, type‐IIb fibres were predominant. For all fibre types, domestic pigs had about threefold larger fibres than wild pigs. Type‐I fibres tended to be the smallest fibres in domestic pigs, but the largest fibres in wild pigs, which may be due to long‐term training effects in the free‐ranging animals. Giant fibres as an indicator of degeneration were obvious only in the domestic‐pig samples. Their occurrence, as well as the larger fibre size and the predominance of type‐IIb fibres in domestic pigs, may be ascribed to high concentrations of growth hormone. It is concluded that selection for muscular growth may favour metabolic dysbalances within the muscle and, therefore, degenerative processes.
Serotonin‐Containing Cells in the Horse Gastrointestinal Tract
Authors: Ceccarelli P. , Pedini V. , Gargiulo A. M. 
Published: June 2007

SummaryThe presence and distribution of serotonin‐containing cells in the gastroenteric tract of horses have been investigated. The enterochromaffin (EC) cells have been identified using immunostaining procedures at both light and electron microscopic level. The EC cells were very numerous in the pyloric gland region, were only few in the duodenum but were absolutely lacking from the more distal portions of the intestine.