bluuebunny/crossref_metadata_2025_split huggingface dataset:
Involutión «in vitro», regeneración y actividad functional de la zona de la cresta apical ectodérmica del esbozo del miembro de polio*
Authors: Jorquera B. , Molinari E. , Goicoechea O. , Ggarrido O. 
Published: June 2007

AbstractIn order to detect morphological changes and activity of the apical ectodermal ridge of the chike embryo limb bud, a series of “in vitro” and “in ovo” experiments were planned.“In vitro* bioassay: ectodermal covering from stage 21 limb buds were cultured in limb bud extracts and non limb bud extracts. Tissues after culture were examined under optic and electron microscopies.“In ovo” studies: Ectodermal jakets, previously cultured, were recombinated with intact limb bud mesoderm and then grafted onto a host embryo.Limb bud extract was able to maintain the ectodermal ridge and even to regenerate flattened ridges previously cultured in non limb bud extracts. The regenerated ridge did not loose the capacity to induce the growth of distal segments of the limb.The regenerated ridge was only produced at the level of its primitive region.
Die Mm. auriculares von Tapirus terrestris L. 1766
Authors: Donat Klaus , Uçar Yaşar 
Published: June 2007

SummaryThe Mm. auriculares of the Tapirus terrestris L. 1766In the Tapirus terrestris the Mm. auriculares are in principle the same as in the Equidae. It is requested that the Mm. auriculares be incorporated into the Nomina Anatomica Veterinaria.
Etude en microscopie optique des poils (Pili) dela faune pyrénéene sauvage en vue de leur détermination
Authors: Pavaux L. Faliu et Cl. , Faliu L. , Lignereux Y. , Barrat J. , Rech J. , Sautet J. Y. 
Published: June 2007

AbstractThis study presents certain data on the hairs of forty species of pyrenean mammals in order to recognize them in the faeces of wild carnivores. Six orders have been considered, in which there are 37 wild species and 3 domestic ones. Samples were taken from the skin of Regio dorsocostalis, on adult animals, and examined by optic microscopy.Different kinds of hairs and their constitutive parts were measured and observed, and a classification established in accordance with previous works. New Nomina Anatomica are proposed. Specific diagnosis of hairs is more or less easy according to the group to which they belong.
Kapillarkonvolute an der Pleura parietalis der Ziege (Capra aegagrus hircus)
Authors: Blähser Sabine , Wille Karl‐Heinz 
Published: June 2007

AbstractThe aim of the present study was to describe the morphology and location of convoluted capillaries of the pleura in the goat. Seven adult male and female goats were (1) fixed by perfusion with formaldehyde or (2) perfused with Indian ink and postfixed in formaldehyde. The parietal pleura was studied systematically for the presence of convoluted capillaries; areas containing such formations were dissected out, counterstained and examined light microscopically. The convoluted capillaries occur (1) within the normal level of the vascular bed, or (2) in villous elevations. The presence of convoluted capillaries is discussed in correlation with the functional studies of Lang (1965).
Sur l'anatomie comparée des artères de l'avant‐bras chez les Mammifères domestiques I. Le système des artères radiales
Authors: Neyret J. P. 
Published: June 2007

SummaryThe comparative anatomy of the antebrachial arteries in the domestic mammals I. The system of the Aa. radialesThe pattern of the antebrachial arteries in general is remarkably uniform when one takes into consideration the relations of the arteries to the median, radial and ulnar nerves. The large special difference of the arteries that accompany these nerves is of secondary importance. The large radial artery of man corresponds in domestic mammals to a series of thinner arteries which arise from the axial vessel formed by the anastomosing brachial and median arteries. The three subsequent arteries, according to the NAV, are the transverse cubital, proximal radial, and the radial. They should be called Aa. radialis proximalis, medial and distalis, because these names correspond more closely with the situation of the radial artery in man. Also, for reasons of homology, it would be more to the purpose to fix the end of the radial artery in domestic mammals — as in man — where the new a. radialis proximalis leaves it.
Dottersacksteine beim Hausgeflügel
Authors: Fehér G. 
Published: June 2007

SummaryYolksac stones in domestic fowlFrom 20–30 yolksac stones are occasionally seen the liquid yellow yolk. They are spherical calcified structures about 100 μ in diameter. Their precursors seem to be leaflike myelin configurations which develop from degenerated yolksac epithelial cells. Predominantly calcium salts in amorphous or crystalline form are deposited in these configurations. Yolksac stones are resorted by the activity of foreign body giant cells. One day old chicks starved for 24 hours show an increase in yolksac stones and a retardation in the resorption of the yolksac.
Bovine Notochord Origin and Development*
Authors: Haldiman Jerrold T. , Gier Herschel T. 
Published: June 2007

AbstractSerial sections of 60 bovine embryos (23 timed specimens) from 17 through 34 days gestation were examined to determine the processes and sequence of notochord development. Head notochord formed during days 18 through 21 as the ventral‐most layer of cells from Hensen's node became intercalated as the notochordal plate between the endodermal cells of the primitive open gut. The notochordal plate responded to contact by the neural plate during day 20 with hypertrophy of notochordal cells and a ventral curving of the notochordal plate margins to form the notochordal ridge which appeared as a dorsal evagination of the gut, but was not endodermal. Formation of the head notochord into a rod (without a notochordal canal or pit) occurred during days 20 and 21 reuniting the endodermal layer ventral to the notochord. Body notochord formed during days 21 through 32–33 caudad from the level of somite pair 6 by accumulation of notochordal cells from Hensen's node directly into a rod surrounded by a basal lamina without contact or penetration of the gut endoderm. Bovine notochord was, thus, formed by two methods. After formation by both methods, the notochord enlarged by proliferation of its own cells. Dorso‐ventral undulations of the notochord became distinct by the 27th day. The processes involved in bovine notochord development were different from descriptions published concerning other species in that 1. two methods of formation were found, and 2. notochordal plate formation preceded notochordal ridge production rather than vice versa.
Über zellfreie und zelluläre Gewebsschranken in neuer Sidit
Authors: Preuss Von Fritz 
Published: June 2007

AbstractThis is an attempt to classify all well known tissue barriers which are built by the cells against each other, and to interprete them genetically. Since the barriers are cutting off certain cell influences, general exchange of information must have been the case before. The germ cells were not excluded from this information exchange. This gives a complete new and concrete base to the possibility of a time‐limited heredity of aquired characters.
Un cartilago vascularizado y a predominancia de células en maxilar superior e inferior de cobayo (Cavia porcellus)
Authors: Sampson Por Graciela Souto de Sims 
Published: June 2007

AbstractA descriptive study of the maxilla and mandible of Cavia is presented. The study includes gross, histological and histochemical investigation of these bones in fetal and adult animals. Particular attention was given to the organization of cellular detail, and vascularity. Tooth development was examined during both intra and extrauterine life. A histochemical study of the ground substance of the cartilage in which these bones develop demonstrated the predominance of acid and neutral mucopolysaccharides.
Testicular Descent in the Dog
Authors: Baumans Vera , Dijkstra Grietje , Wensing C. J. G. 
Published: June 2007

AbstractThe mechanism underlying the process of normal testicular descent in the dog has been examined by a morphological, histological and histochemical analysis of testis and gubernaculum during the period from the 53rd day post coitum (p. c.) until the 40th day post partum (p. p.). Within this period, the testis passes the inguinal canal on the third or fourth day p. p. and reaches its scrotal location on the 35th day p. p. During the entire period the histological composition of the testis (volume percentage of seminiferous tubules, volume percentage of Leydig cells, diameter of seminiferous tubules, number of germ cells) is fairly constant. The △5‐3β‐hydroxysteroid dehydrogenase activity in the Leydig cells before birth suggests a steroid synthesis. Outgrowth and swelling of the gubernaculum occurs until the fifth day p. p. but morphological, histological and histochemical data indicate an onset of gubernacular regression during the last phase of the outgrowth reaction. The migration of the testis from the caudal end of the kidney towards the inguinal canal is associated with the outgrowth of the gubernaculum; during the phase of gubernacular regression, the testis moves from the inguinal canal towards its ultimate location in the scrotal pouch.
Histochemical Properties of Fast Twitch Muscle in the Rat
Authors: Edjtehadi G. D. 
Published: June 2007

AbstractA histochemical study of muscle fibers comprising the extensor digitorum longus muscle of adult female Wistar rats was carried out in which Acid ATPase, Alkaline ATPase, Phosphorylase and SDHase determinations were used to classify muscle fibers. On the basis of Alkaline and Acid ATPase determinations three classes of muscle fibers were determined, Dark, Intermediate and Light, respectively. On the basis of Phosphorylase and SDHase, two classes of muscle fibers were found, classed as Dark and Light fibers. Therefore fibers could be identified within the muscle of 13 different types. An analysis of the muscle on this basis is compared with that of other muscles in the rat and with muscles of other species studied with either cytochemical or physiological techniques.
Der M. cucullaris beim Amerikanischen Tapir (Tapirus terrestris, L. 1758)
Authors: Donat Von Klaus 
Published: June 2007

AbstractThe reexamination of the branchiogenic muscles of the shoulder shows also in the Lowland Tapir, that the dorsal branch of the Ramus ext. of the N. accessorius innervates the three parts of the M. trapezius (Pars clavicularis, cervicalis and thoracalis), and the ventral branch innervates the two parts of the M. sternocleidomastoideus (Pars sternomandibularis and sternomastoidea). There is no Pars cleidomastoidea in the latter muscle. As common name for all muscles innervated by the Ramus ext. of the N. accessorius, the term M. cucullaris is proposed again.
The Arterial Supply to the Ileum, Cecum and Proximal Loop of the Ascending Colon in the Ox*
Authors: Maala C. P. , Sack W. O. 
Published: June 2007

AbstractThis study describes in detail the arteries supplying the ileum, cecum and proximal loop of the ascending colon in the ox important to the veterinary surgeon treating disorders of these segments of the intestinal tract. The ileum was vascularized by the mesenteric ileal artery (from the ileocolic), the first ileal artery (from the cranial mesenteric) and by the ileal branches of the cecal artery which, by means of their anastomoses, form a row of antimesenteric arches in the ileal part of the ileocecal fold. The termination of the ileum was also supplied by twigs from the ileocecocolic arch. The ileum appears to be the most vascular part of the small intestine. The cecum was supplied mainly by the cecal branches of the cecal artery. The proximal end of the cecum was also vascularized by branches from the ileocecocolic arch. The proximal loop of the colon was vascularized by the three colic branches of the ileocolic. The first colic branch supplied the third part of the loop, the second colic branch supplied the first and the second parts of the loop and the third colic branch supplied the first part and, together with the first cecal branch of the cecal artery, formed the ileocecocolic arch at the dorsolateral surface of the ileocecocolic junction.The terminal branches of the arteries to the ileum, cecum and proximal loop of the colon detached lateral branches in the tunica muscularis which anastomosed with similar branches from neighboring arteries in an arcuate manner in the tunica submucosa. The terminal branches from both sides terminated in the free border, releasing branches which anastomosed with each other in the tunica submucosa.The colic lymph nodes were supplied by the colic branches of the ileocolic artery, die two largest nodes being perforated by some of the branches of the first two colic branches. The ileal lymph nodes were supplied by the ileal arteries of the cranial mesenteric. They were also perforated by these arteries. Cecal lymph nodes were seen only in the specimen from the calf. They were much smaller than the colic and ileal nodes and were supplied by the first two or three cecal branches of the cecal artery and also by twigs arising directly from the cecal artery.
Mikroskopische Untersucfaungen zum Einfluß unterschiedlich hoher FlÜssigkeitsangebote auf die Morphologie der Nierenkorperchen des Haushuhnes (Gallus domesticus)*
Authors: Schwarz Von R. , Radke B. 
Published: June 2007

AbstractThe micromorphology and behavior especially of the mesangial cells and podocytes in the avian renal corpuscles were studied under varying conditions of water excessive supply and water deprivation.We entertain the idea that the different functional states find expression in different morphological features in regard to the mesangial cells and podocytes.
Bovine Somite Development and Vertebral Anlagen Establishment*
Authors: Haldiman Jerrold T. 
Published: June 2007

AbstractSerial sections of seventy four bovine embryos from 18 through 38 days gestation were studied to determine the processes and sequence of somite development and differentiation.Somites are formed from day 20 through day 32 or 33 depending upon the individual. Each newly formed somite consists of a discrete block of cells organized into a densely aggregated outer layer enclosing a core of loose mesenchymal cells. Each somite differentiates about 12 hours after its formation into sclerotome and dermamyotome. The ventral and medial surface layer becomes loosely mesenchymal continuous with the mesenchymal core while the rest of the surface layer remains unchanged as dermamyotome. Further change occurs during the next 24 hours as the dermamyotome flattens with somite growth to form a distinct surface layer of perpendicularly arranged cells, the dermatome, and an inner layer of longitudinally arranged cells, the myotome. By day 4 after a somite is formed a transitory artifact, the so‐called “myocoele”, is often produced during dehydration for sectioning. The shrinkage artifact occurs progressively caudal through the sacral region until the cellular density of the myotomes equals that of the dermatomes.Vertebral development begins ventro‐medial to somite pairs 6 through 12 on day 23 as sclerotomic cells form a continuous band beneath the notochord. Band production continues caudad progressively. The sclerogenic band is transformed into a continuous sclerogenic tube around the notochord at first ventro‐medial to somite pairs 15 through 20 and then progressively cranial to somite pair 6 and caudal to somite pair 25 during day 26 as the dorsolaterally attached sclerotomes develop dense caudal halves. During day 27, sclerotomic cells from the caudal dense sclerotome halves form perichordal rings within the sclerogenic tube of the cervival and thoracic regions alternating with the blastemal centra which become vascularized during day 28. Neural and transverse processes develop during day 29 from the caudal dense sclerotome halves connected to the perichordal rings and cranial portion of the centra. Sclerotomes of the cervical through sacral regions disappear by day 31. The blastemal centra become procartilaginous (new term) during day 32 through 34. Precartilage is produced in the ribs during day 33, cervical and thoracic neural processes during day 35, lumbar and sacral neural processes and cervical and lumbar transverse processes during day 36, and sacral transverse processes during day 37.
The Capillary Circulation in the Penile Skin of the Dog
Authors: Ninomiya Hiroyoshi , Nakamura Tsunenori 
Published: June 2007

AbstractThe microcirculation of the penile skin of the dog is described. This study is based on the examination of the penile skin vasculature of 14 adult dogs in which injection cast preparations of the capillary systems had been made. The capillary organization was examined with the aid of a scanning electron microscope. The organization of the capillary system and associated microregulatory vessels are presented as a model for further investigation of micro‐circulatory anatomy and physiology.
Ultrastructure of the Bull Seminiferous Tubule Supporting Cells with Special Consideration of the Cell Junctions
Authors: Bielańska‐Osuchowska Z. , Sysa P. S. 
Published: June 2007

AbstractThis study represents an electronmicroscopic examination of seminiferous tubule epithelium of the bull, with special attention to the cell types and junctional complexes between cells which contribute to the blood‐testis barrier. In general seminiferous epithelium of the bull resembles that of other animals with some alterations in supportive cell types and organization of junctional complexes between epithelial cells. These differences are illustrated and discussed in regard to their possible functional significance.
On the Histochemistry of the Seminiferous Tubules and their Terminal Segments in the Ram Testis
Authors: Osman D. I. 
Published: June 2007

AbstractThe purpose of this study is to investigate some histochemical reactions in the lining epithelium of the seminiferous tubules and their terminal segment. The material was taken from adult rams killed in the slaughter house. The results showed clear histochemical differences between the seminiferous tubules and the terminal segment. This fact leads to the speculation that the terminal segment has quite different role from that of the seminiferous tubules.
Die arterielle Vaskularisation des Schweinethymus in der zweiten Hälfte der pränatalen Periode
Authors: Von Wustinger J. , Pospieszny N. 
Published: June 2007

AbstractEighteen male and 13 female pig fetuses taken from 4 dams were studied. Each litter formed a developmental group: the first had 7 fetuses 10 weeks old, the second had 9 fetuses 14 weeks old, the third had 9 fetuses 16 weeks old, and the fourth had 6 fetuses 17 weeks old. Our study shows that the number of blood supply sources increase with the age of the fetuses. The principal source of supply was the thyreocervical trunk which occurs only in the pig.
Morphological Aspects of Prenatal Haematopoietic Development in the Cat
Authors: Canfield P. J. , Johnson R. S. 
Published: June 2007

AbstractThe appearance of haematopoietic cells and the development of haematopoiesis in certain embryonic organs of the cat were studied using light microscopic (cytological smears and paraffin embedded tissues) and transmission electron microscopic methods. Primitive erythropoiesis occurred predominantly in the yolk sac whereas definitive erythropoiesis occurred in the yolk sac, liver, bone marrow and, to a lesser extent, in the spleen. In the yolk sac, erythropoiesis was predominantly intravascular whereas in the liver and bone marrow it was usually extravascular. Granulopoiesis occurred mainly in the liver and bone marrow. In the liver it was predominantly extravascular and occurred around vessels, bile ducts and in perisinusoidal spaces. Megakaryocytopoiesis occurred in the yolk sac, liver, bone marrow and spleen. The megakaryocytic line of cells were similar to those occurring in adult cats except that in the yolk sac unusual small, mononuclear to binuclear thrombocytogenic megakaryocytes were present also.The relative contributions of the embryonic organs of the cat to haematopoiesis were similar to those described for man and certain other mammals but the results for the sites of development and the appearance of early forms in the erythrocytic, granulocytic and megakaryocytic lines varied at times from those reported for man and other mammals.
Comportamiento de los tejidos Palatinos durante el proceso de palatogenesis anormal en el ratón (Mus musculus)
Authors: Montenegro Por M. A. , Blánquez M. J. , Martín R. , Lemus D. , de la Vega Y. Paz 
Published: June 2007

AbstractThe development of the palatine process in die presence of phenylbutazone and indomethacin was carried out in preparations collected at 13.5 days of gestation, followed by tissue culture in the mouse. It was demonstrated that both agents interfere with the normal development of the palate. The mechanisms which are apparently responsible for this abnormality are discussed.
Differential Distribution by Size of Layer V Pyramidal Neurons in Raccoon (Procyon lotor) Sensorimotor Cortex1,2
Authors: Buxton Donald F. 
Published: June 2007

AbstractA cytoarchitectonic study of pyramidal neurons of layer V of the primary motor (MsI), supplementary motor (MsII), primary sensory (SmI) and second sensory (SmII) cortices was carried out in the raccoon (Procyon lotor). The relationships between cell size, ease of excitability and type of movement elicited from these areas is discussed, and differential distribution of pyramidal cells according to size in the raccoon is compared with that of other species.
Effect of Isocyanide on the Ultrastructure of Mouse Pineal*
Authors: Chang Nada , Bhatnagar Kunwar P. 
Published: June 2007

AbstractTo investigate the possible influence of a strong malodorant on the pineal gland, the effects of tertiary n‐butyl isocyanide on the ultrastructure of pinealocytes were studied. Adult male mice were adapted to a 23 hr dark: 1 hr light “long night” regimen to stimulate their pineal glands. Pinealocytes in “long night” adapted animals appeared metabolically active. Dramatic ultrastructural changes seen in pinealocytes of “long night” adapted animals after a six‐hour exposure to the malodorant followed by a ten‐hour period of rest included an increase in density of the nuclear chromatin, dilatations of the nuclear envelope, dilatation of the smooth endoplasmic reticulum and swelling of mitochondria. Isocyanide treatment did not affect the ultrastructure of liver, kidney, olfactory bulb or striate cortex of the animals exposed to odor. Our observations indicate that inhalation of isocyanide induces specific ultrastructural changes in the pineal gland which may be suggestive of its altered synthetic activity.
Morphologische Unterscheidungsmöglichkeiten zwischen den Nieren des Pferdes und Maultieres gegenüber denen des Esels und Maulesels
Authors: Simić Von V. 
Published: June 2007

AbstractBy means of plastic injections it was possible to determine that the kidneys of horse and mule have terminal recesses while those of the donkey and hinny have no terminal recesses.