Vascular factors in the pathogenesis of pre-eclampsia: recent findings

in Revue Française de Gynécologie et d'Obstétrique (1984), 79(4), 249-252

Normal, rigid and fibrotic utero-placental arteries are resistant to the action of circulating vaso-motor substances. In contrast, the persistence and the hyperplasia of smooth muscle fibres result in a ... [more ▼]

Normal, rigid and fibrotic utero-placental arteries are resistant to the action of circulating vaso-motor substances. In contrast, the persistence and the hyperplasia of smooth muscle fibres result in a reduced flow in the intervillous compartment and a sensitivity of the vessels to vaso-constrictor substances. These lesions, which develop after the twentieth week, provide the necessary conditions for the subsequent development of the characteristic vicious cycles of eclampsia. [less ▲]

On the structural analogy between D-alanyl-D-alanine terminated peptides and beta-lactam antibiotics

in European Journal of Medicinal Chemistry (1984), 4

Structural analogy between D-alanyl-D-alanine terminated peptides (and analogues) of varying substrate activity toward D-alanyl-D-alanine-cleaving peptidases, and bicyclic fused ring azetidinone ... [more ▼]

Structural analogy between D-alanyl-D-alanine terminated peptides (and analogues) of varying substrate activity toward D-alanyl-D-alanine-cleaving peptidases, and bicyclic fused ring azetidinone structures of varying inactivating potency toward the same enzymes has been exa-mihed by comparing the relative spatial disposition of the carboxylate function at the C-terminal position and the amide function at the N-terminal position with respect to the scissile amide bond at the central position. The observed variations in the geometric parameters and the molecular electrostatic potential maps generated by these functional groups suggest multiple modes of binding. In the monobactam sulfazecin, the relative disposition of at least the scissile amide bond and the terminal sulphamate group is comparable to that of the corresponding functions in the bicyclic β-lactams. [less ▲]

Unimolecular Decay Paths of Electronically Excited Species. V. The A2B1 State of H2CO+

in Journal of Chemical Physics (1984), 81

Hydrodemetalation and hydrodesulfurization of petroleum residua using manganese nodules in trickle bed reactor

in Applied Catalysis (1984), 11

Texture of manganese nodules used as a catalyst for demetalizing and desulfurizing petroleum residua

in Colloids and Surfaces A : Physicochemical and Engineering Aspects (1984), 11

Un logiciel de cartographie assistée par micro-ordinateur

in Cartographica (1984), 21(2 & 3), 93-100

a prospective study of intrapulmonary fat accumulation in the newborn lung following intralipid infusion

in Acta Paediatrica Scandinavica (1984), 73

Caractérisation d'Escherichia coli entérotoxinogène d'origine bovine par hybridation ADN-ADN sur colonies

in Annales de Recherches Vétérinaires = Annals of Veterinary Research (1984), 128

Essai synécologique sur les micromammifères d'Europe atlantique et ouest méditerranéenne: étude par analyse du régime alimentaire de Tyto alba (Scopoli)

in Cahiers d'Ethologie (1984), 4(2), 1-202

Methods: owl pellets in Belgium, Corsica and in East Pyrenees. Quality of the samples: exhaustivity and representativity. Habitat evaluation in the barn owl home range: climate, orography, vegetation ... [more ▼]

Methods: owl pellets in Belgium, Corsica and in East Pyrenees. Quality of the samples: exhaustivity and representativity. Habitat evaluation in the barn owl home range: climate, orography, vegetation. Discussion for the method. Landscape structure and the mammal communities. Interspecific competition in island biocoenoses. [less ▲]

Glipizide increases plasma insulin but not C-peptide level after a standardized breakfast in type 2 diabetic patients.

in European Journal of Clinical Pharmacology (1984), 26(4), 471-4

Peripheral blood glucose, plasma insulin and C-peptide levels were investigated after giving a standardized breakfast (500 kcal, 60 g carbohydrates) to 10 nonobese Type 2 diabetic patients previously ... [more ▼]

Peripheral blood glucose, plasma insulin and C-peptide levels were investigated after giving a standardized breakfast (500 kcal, 60 g carbohydrates) to 10 nonobese Type 2 diabetic patients previously treated by diet alone. Each patient received at random, at 1 week intervals, either 5 mg glipizide (meal + glipizide) or a placebo (meal alone) 30 min before breakfast. Basal values of blood glucose, plasma insulin and C-peptide were similar on both occasions. After meal + glipizide, the blood glucose increase was sharply limited whereas the rise in plasma insulin was steeper and reached twice as high a level. In contrast, the rise in plasma C-peptide was similar in both conditions. Consequently, the areas under the curves (0-300 min) showed a marked reduction in blood glucose after meal + glipizide (2289 +/- 149 versus 3101 +/- 169 mmol X min/1; 2p less than 0.001), associated with a significant increase in plasma insulin (14219 +/- 3261 versus 7591 +/- 1173 microU X min/ml; 2p less than 0.025) but no significant change in plasma C-peptide (342 +/- 45 versus 326 +/- 34 pmol X min/ml; N.S.). The insulin/C-peptide molar ratio was thus significantly increased after meal + glipizide (0.41 +/- 0.06 versus 0.23 +/- 0.04 at the 60th min; 2p less than 0.02). The dissociation between the responses of insulin and C-peptide suggests that a single dose of 5 mg glipizide in Type 2 diabetic subjects may enhance availability of peripheral insulin by extrapancreatic mechanism(s). This phenomenon may result in a higher circulating level of the hormone and therefore represent a further mode of action of sulphonylureas.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

Improvement of pretreatments and technologies for enzymatic hydrolysis of cellulose from industrial and agricultural refuse and comparison with acidic hydrolysis.

Scientific journal (1984)

Chemical and enzymatic hydrolysis of cellulose are compared. Basic research on paper mill celluloses shows that it is mainly the endo- and exocellulase activities which are absorbed on the substrate. In ... [more ▼]

Chemical and enzymatic hydrolysis of cellulose are compared. Basic research on paper mill celluloses shows that it is mainly the endo- and exocellulase activities which are absorbed on the substrate. In the case of the Trichoderma reesei complex with Aspergillus niger beta-glucosidase, the exocellulase activity has proved to be the limiting factor in the design of a reactor which recycles the enzyme complex. Tests were carried out on various pretreatments for substrates of more complex chemical composition, such as straw, maize stalks, beet pulp. The rate and overall degree of hydrolysis, especially for straw, were improved by chemical treatments in combination with mechanical processes. A first pilot plant for straw hydrolysis was set up with the aim of attaining high sugar concn in the fermenter. [less ▲]

Diagnostic de la colibacillose entérotoxique du veau au moyen de deux sondes ST : application sur le contenu intestinal

in Annales de Médecine Vétérinaire (1984), 128

A Dissociative Electroionization Study of Nitrous Oxide. The O+ and N+ Dissociation channels.

in Chemical Physics (1984), 84

After the investigation of the decay of N2O into NO+ and N2+ the dissociation channels leading to O+ and N+ are examined by electroionization using ion kinetic energy and mass analysis. Appearance ... [more ▼]

After the investigation of the decay of N2O into NO+ and N2+ the dissociation channels leading to O+ and N+ are examined by electroionization using ion kinetic energy and mass analysis. Appearance energies of O+ and N+ are measured as a function of the kinetic energy of the fragment ions. Predissociation is the main mechanism for ion production in both channels. In the O+ decay channel the 4Sigma- state is an important intermediate. The neutral N2(X1Sigma+/g) mainly appears vibrationally excited. In the N+ dissociation channel, 2Pi states have to play an important role by predissociating the N2O(C2Sigma+) state and the higher-lying doubly excited states of N2O+. [less ▲]

Efficacite contre de Ditylenchus dipsaci (Kuhn) Fil. De nematicides incorpores dans l'enrobage de graines de feverole (Vicia faba L.).

in Mededelingen (Rijksuniversiteit te Gent. Fakulteit van de Landbouwkundige en Toegepaste Biologische Wetenschappen) (1984), 49(2b), 635-641

Quand les fantômes viennent à notre rencontre (à propos du gros plan)

in Revue Belge du Cinéma (1984), 10(Hiver), 75-84

Le gros plan de visage comme image-pellicule.

Colour rendering and spectral power distribution: a new parametric approach

in Lighting Research & Technology (1984), 16 (3)

Immunohistochemical localization of basement membrane components and interstitial collagen types in preovulatory rat ovarian follicles.

in Collagen and Related Research (1984), 4(4), 279-87

Cryosections of ovaries from rats treated with pregnant mare serum gonadotropin (PMSG) were immunostained with antibodies against collagen types, I, III, IV and V, laminin and heparan sulphate ... [more ▼]

Cryosections of ovaries from rats treated with pregnant mare serum gonadotropin (PMSG) were immunostained with antibodies against collagen types, I, III, IV and V, laminin and heparan sulphate proteoglycan using the peroxidase-antiperoxidase technique. A uniform belt-like staining was observed between the granulosa and theca interna layers with antibodies against type IV collagen, laminin and heparan sulphate proteoglycan. Interstitial collagens type I and III stained the connective tissue in the theca externa layer but gave only faint staining in the area between the granulosa and theca interna zones. If the PMSG-treated rats were injected with human chorionic gonadotropin the number of follicles that showed a discontinuous, ragged or disrupted staining reaction in the area between the granulosa and theca interna layers was clearly increased. Surprisingly in such cases also a punctate staining reaction was seen in the basal granulosa cells. When the rats were injected with radioactive human chorionic gonadotropin, most of the ovarian follicles were labeled within 2 hours. These follicles still showed a continuous staining reaction with antibodies against basement membrane components at the border of the granulosa and theca interna cell layers. These results suggest that there is a basement membrane-like structure in Graafian follicles between the granulosa cells and theca interna layer, and that this basement membrane is disrupted after human chorionic gonadotropin stimulation. [less ▲]

Particular points of elastic analysis of clad pitched roof portal frame structures

in Thin-Walled Structures (1984), 2(2), 165-174

Particular points of elastic analysis of clad pitched roof portal frame structures

in Thin-Walled Structures (1984), 2(2), 165-174

Modèles expérimentaux pour l'étude des infections virales du système nerveux

in Bulletin et Mémoires de l'Académie Royale de Médecine de Belgique (1984), 139(3), 218-226

Indirect Uv Detection of Hydrophilic Ionized Compounds in Reversed-Phase Liquid Chromatography by Use of a Uv-Absorbing Ion of the Same Charge

in Journal of Pharmaceutical & Biomedical Analysis (1984), 2(2), 241-53

Ion-pair reversed-phase liquid chromatographic systems have been developed that allow the detection and quantitation of low amounts of hydrophilic ionized substances, which otherwise display little or no ... [more ▼]

Ion-pair reversed-phase liquid chromatographic systems have been developed that allow the detection and quantitation of low amounts of hydrophilic ionized substances, which otherwise display little or no capability for optical detection. The mobile phase contains a UV-absorbing ion of the same charge and hydrophobic character as the samples, most often together with a hydrophobic counter-ion to give the samples suitable retention; the stationary phase consists of octadecylsilica. Chromatograms featuring two system peaks are usually obtained, and these give rise to some deviations from the usual response pattern. In the present work the influence on retention and detection sensitivity of the non-absorbing counter-ion, the UV-absorbing ion and the uncharged organic modifier have been studied systematically. Principles for optimizing the detector response by changing the mobile phase composition have been deduced. Examples of applications of the indirect detection technique to the analysis of hydrophilic compounds of pharmaceutical and biological interest, such as amino acids, water-soluble vitamins and piperazine, are presented. [less ▲]

Isolation of follicular dendritic cells from human tonsils and adenoids. I. Procedure and morphological characterization.

in Journal of Immunological Methods (1984), 66(2), 235-44

Follicular dendritic cells have been isolated from human tonsils and adenoids and characterized at the ultrastructural level. Follicles were dissected and digested with different hydrolytic enzymes. The ... [more ▼]

Follicular dendritic cells have been isolated from human tonsils and adenoids and characterized at the ultrastructural level. Follicles were dissected and digested with different hydrolytic enzymes. The cells were separated by sedimentation at unit gravity. By this procedure we obtained follicular dendritic cells enveloping lymphocytes with their cytoplasmic extensions in a way analogous to that described for isolated thymic nurse cells. The ultrastructural features of isolated follicular dendritic cells are similar to those observed in situ. Prolonged enzymatic action caused loss of the enveloped lymphocytes. [less ▲]

Type IV and V collagens in von Recklinghausen's neurofibromas. An immunohistochemical and electrophoretical study.

in Virchows Archiv. B : Cell pathology (1984), 47(4), 291-301

Type IV and V collagens were localized in neurofibromas from six patients with von Recklinghausen's neurofibromatosis (NF) using the peroxidase anti-peroxidase (PAP) technique. The collagens were also ... [more ▼]

Type IV and V collagens were localized in neurofibromas from six patients with von Recklinghausen's neurofibromatosis (NF) using the peroxidase anti-peroxidase (PAP) technique. The collagens were also isolated from neurofibromas by pepsin digestion and fractionating salt precipitations and demonstrated with sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE). Staining reactions for both collagens were detected in most of the cells in the disorganized NF tumor tissue. These cells also were S-100 protein-positive and were considered to be of Schwannian cell origin, while the type IV collagen-negative cells showed fibroblastoid, mast cell and histiocytic characteristics. Type IV collagen detection was also used to study the structure of a neurofibroma after 3 weeks in tissue culture. The proportion of fibroblastoid, type IV collagen-negative cells increased significantly in the cultured neurofibromas and "buds" containing solely fibroblastoid cells were seen at the periphery of the tumor fragments. Cultured 6th passage tumor cells produced type V but no type IV collagen as estimated with SDS-PAGE. Further, two malignant Schwannomas from a patient with NF were stained with antibodies to type IV collagen. A positive staining reaction was associated only with the vascular walls in the malignant Schwannomas suggesting that type IV collagen expression is linked with cell differentiation. The present data show that the detection of type IV collagen using the PAP-method is useful in studying the organization of tumors with mixed cell populations such as neurofibromas. Large neurofibromas might also serve as a source for the isolation of human type IV and V collagens. [less ▲]

Sur le régime alimentaire de la chouette de Tengmalm (Aegolius funereus) en Belgique

in Aves (1984), 21(1), 57-59

Atlas des Mammifères sauvages de Wallonie (suite). Le genre Mustela L. en Belgique

in Cahiers d'Ethologie (1984), 4(4), 279-313

The distribution and the present status of the polecat, stoat and weasel in Belgium are presented. At this time, these species are widely distribution all over the country and it seems that they aren't ... [more ▼]

The distribution and the present status of the polecat, stoat and weasel in Belgium are presented. At this time, these species are widely distribution all over the country and it seems that they aren't shortly threatened. Some original data on mortality causes are briefly discussed. Undoubtely, it appears that the major ones are trapping and killing by gamekeepers and road casualties, both accounting for more 70 % of the polecat's (n=96) and stoat's (n=45) losses and for 63% (n=101) of the weasel's ones. No information is available about possible death cases due to ingestion of poisoned baits. Poisoning, trapping and hunting are no longeur allowed in the northern part of Belgium (Flanders) but they are permitted in the southern part (Wallony) all over the year without any limitation (except for poisonning). With the legal protection of these animals in prospect, their dietary habits and their main behavioural and demographical characteristics are reviewed. [less ▲]

Evolution of perinatal mortality in 4 maternal health centers in the Walloon region from 1977 to 1982]

in Revue Médicale de Liège (1984), 39

Use of an ELISA involving monoclonal antibody for the detection of antibodies against BLV in a herd with high incidence of enzootic bovine leucosis.

in Zentralblatt für Veterinarmedizin. Reihe B = Journal of Veterinary Medicine. Series B (1984), 31

Phosphate derivatives of thiamine and Na-channel in conducting membranes

in Journal of Neurochemistry (1984), 43

Bovine Leukemia Virus (BLV) - A structural model based on chemical crosslinking studies

in Virology (1984), 133

Art et écriture

in Art&fact (1984), 3

Compte rendu de I. Mazzini, G. Flammini, De conceptu. Estratti di un'antica traduzione latina del Peri gynaikeiôn pseudoippocratico l. I, Bologna, 1983

in Etudes Classiques (Namur, Belgium) (1984), 52

Compte rendu de J. Kollesch, D. Nickel, Antike Heilkunst. Ausgewählte Texte aus dem medizinischen Schrifttum der Griechen und Römer, Leipzig, 1979

in Antiquité Classique : Revue Interuniversitaire d'Etudes Classiques (1984), 53

Comparaison de deux methodes spectroscopiques d'identification couplees a la chromatographie en phase gazeuse: CPG-SM et CPG-FTIR, dans le cas des isothiocyanates.

in Bulletin des Recherches Agronomiques de Gembloux (1984), 19(3-4),

Les isothiocyanates obtenus après hydrolyse enzymatique des glucosinolates contenus dans les graines de colza sont étudiés par chromatographie en phase gazeuse couplée à la spectrométrie de masse (CPG-SM ... [more ▼]

Les isothiocyanates obtenus après hydrolyse enzymatique des glucosinolates contenus dans les graines de colza sont étudiés par chromatographie en phase gazeuse couplée à la spectrométrie de masse (CPG-SM) et par chromatographie en phase gazeuse couplée à un spectromètre infrarouge à transformée de Fourier (CPG-FTIR). La comparaison de ces deux techniques a permis de mettre en évidence leurs avantages et leurs inconvénients. Elles apportent des informations différentes et donc complémentaires. [less ▲]

"Avortement" et "Contraception": sujets et épiphénomènes dans la société grecque contemporaine

in Sighrona Themata (1984), 26

Intérêt de la mesure de la fonction du récepteur Fc des monocytes circulants et des macrophages spléniques dans les néphropathies glomérulaires de l'enfant

in Revue Médicale de Liège (1984), 39(8), 332-334

Nicoletta CHERUBINI, Pierre nue, poème-légende des photographies de Nguyen Van Thong

in Catalogue de l'exposition Pierres nues (Liège, du 26 mai au 30 juin 1984) (1984)

Estimation de la surface forestière Wallonne par comptage de points.

in Bulletin de la Societe Royale Forestiere de Belgique (1984), 91(4), 150-158

The total forest area of Walloonia (south part of Belgium) has been estimated by a dot grid method which consists in counting the number of dots that fall within the boundaries of the forests drawn on ... [more ▼]

The total forest area of Walloonia (south part of Belgium) has been estimated by a dot grid method which consists in counting the number of dots that fall within the boundaries of the forests drawn on maps. All the concerned points were counted and their assignment have been checked on the field (grid of 1000 m x 500 m). According to this method 530.350 hectares should be covered by the forest. [less ▲]

Blood plasma LH and testosterone concentration in anabolized bulls

in Animal Production (1984), 39

L'approche scientifique du bien-être des animaux exploités en systèmes d'élevage intensif

in Annales de Médecine Vétérinaire (1984), 128

Immunoreactive trypsin in the adult respiratory distress syndrome

in Intensive Care Medicine (1984), 10

Cloning and structure analysis of the rat apolipoprotein A-I cDNA

in European Journal of Biochemistry (1984), 140(3), 493-8

Apolipoprotein A-I, the major protein in mammalian high-density lipoprotein, acts as a cofactor for lecithin-cholesterol acyltransferase during the formation of cholesterol ester and as such, is thought ... [more ▼]

Apolipoprotein A-I, the major protein in mammalian high-density lipoprotein, acts as a cofactor for lecithin-cholesterol acyltransferase during the formation of cholesterol ester and as such, is thought to promote cholesterol efflux from peripheral cells to the liver. In this paper, we report the partial purification of rat liver apolipoprotein A-I mRNA by a polysome immunoadsorption technique, and its cDNA cloning. Isolation of two overlapping cDNA clones enabled us to derive the whole rat apolipoprotein A-I cDNA coding sequence. Comparison of the deduced protein sequence with its human counterpart reveals a striking homology between the prepropeptide precursors. Both mature protein amino-terminal regions are very homologous, suggesting that this particular domain could be involved in lipid/protein binding or lecithin-cholesterol acyltransferase activation. [less ▲]

Influence of opacities, partition functions and hydrogen diffusion on the 5 min solar oscillations

in Memorie della Società Astronomica Italiana : Journal of the Italian Astronomical Society (1984), 55(1-2), 169-174

Several accuracy tests of the frequencies computation have been performed. They show that for a given model, the frequencies have errors lower than 2 micro-Hz. Several tests have also been made on the ... [more ▼]

Several accuracy tests of the frequencies computation have been performed. They show that for a given model, the frequencies have errors lower than 2 micro-Hz. Several tests have also been made on the Henyey code. They show that the use of the same opacity formula as Bahcall et al. (1983) allows to reproduce their model with a good accuracy. The model has however frequencies systematically 12 micro-Hz larger than found by Ulrich and Rhodes. A model with diffusion of H and He has also been studied. Its frequencies are nearly the same as those of the standard model. [less ▲]

A New Method to Evaluate Wave Impact Forces on Offshores Structures

in Proceedings of the Offshore Technology Conference (1984)

Use of the Polymer Polyox XSR 301 in Model Trials of Irland Navigation

in Proceedings of the AIRH Symposium on Scale Effects in Modelling Hydraulic Structures (Technische Akademie, Esslingen) RFA (1984)

Estradiol contributes to the postnatal demasculinization of female Japanese quail (Coturnix coturnix japonica).

in Hormones and Behavior (1984), 18(3), 287-97

Two experiments were performed to characterize the process of postnatal demasculinization in Japanese quail. In the first experiment, it was shown that estradiol (E2) can complete female demasculinization ... [more ▼]

Two experiments were performed to characterize the process of postnatal demasculinization in Japanese quail. In the first experiment, it was shown that estradiol (E2) can complete female demasculinization during the first 4 weeks of life. By contrast, E2 did not demasculinize sexual behavior and cloacal gland in neonatally castrated males. Neonatally gonadectomized females preferentially performed mount attempts when tested in their home cage by comparison to a test arena. In Experiment 2, E2 Silastic implants (40-mm) maintained full copulatory behavior in castrated males but not in females. This large dose of E2 did not demasculinize adult sexually active birds (males or females) even if treatment lasted for 1 month. It is concluded that E2 can demasculinize sexual behavior only in females and only if treatment is performed in very young birds. [less ▲]

Etude de la libération "in vitro" de la nitroglycérine à partir de formulations galéniques destinées à la voie percutanée. Partie II.

in Journal de Pharmacie de Belgique (1984), 39

Immunohistochemical characterization of the basement membranes of the human oral mucosa.

in Archives of Oral Biology (1984), 29(5), 363-8

Type IV and V collagens, laminin and heparan sulphate proteoglycan were localized in vascular and subepithelial basement membranes. Fibronectin was distributed in a reticular pattern throughout the lamina ... [more ▼]

Type IV and V collagens, laminin and heparan sulphate proteoglycan were localized in vascular and subepithelial basement membranes. Fibronectin was distributed in a reticular pattern throughout the lamina propria under the oral epithelium. The uniform distribution of basement membrane components and type V collagen in different regions suggests a similar molecular composition for the basement membranes under functionally-different oral epithelia. The more intense reaction in the vascular than in the subepithelial basement membranes, with diluted antibodies to type IV collagen and laminin apparently reflects chemical differences in these basement membranes. Occasional discontinuities in the subepithelial basement membranes were seen in inflamed gingival sulci and in tonsillar crypts. The destruction responsible affected all basement membrane components, except fibronectin, which maintained a reticular distribution even in the deep tonsillar tissue. The immunohistochemical method is useful in demonstrating different degrees of destruction in basement membranes associated with inflammation. [less ▲]

Isolation and characterization of the human prolactin gene

in EMBO Journal (1984), 3(2), 429-37

Prolactin (PRL) and growth hormone (GH) genes derive from a common ancestor and still share some sequence homologies. Their expression in the pituitary gland is regulated in opposite directions by most of ... [more ▼]

Prolactin (PRL) and growth hormone (GH) genes derive from a common ancestor and still share some sequence homologies. Their expression in the pituitary gland is regulated in opposite directions by most of the many hormones acting on them. This provides an interesting system to study sequences involved in gene expression. Using a human PRL cDNA clone as a probe, we screened a human genomic DNA library in lambda phage and isolated a single recombinant comprising the whole hPRL gene. It was characterized by restriction endonuclease mapping and cDNA hybridization, by DNA heteroduplex analysis and by nucleotide sequencing. The hPRL gene is present as a single copy per haploid genome, is approximately 10 kb long and contains four introns, three of which interrupt the coding sequence at the same locations as in the known GH and PRL genes. The origin of transcription was determined by S1 mapping on prolactinoma mRNAs. The search for direct and inverted repeats, as well as dyad symmetries was carried out in the 900-bp sequenced in the 5'-flanking region. Sequence homologies between hPRL, hGH and rPRL were derived from computer drawn matrices for these upstream regions. [less ▲]

Etude dendrométrique des ormes (Ulmus glabra Huds. et Ulmus campestris L.)

in Notes Techniques du Centre d'Ecologie Forestière et Rurale (1984), 45

Effect of somatic growth on pulmonary function values in healthy Friesian cattle

in American Journal of Veterinary Research (1984), 45(10), 2003-2007

Growth-related changes in pulmonary function values (PFV) of cattle were investigated by a cross-sectional study of 40 healthy Dutch Friesian cattle, 3 days to 13 years of age and weighing 37 to 660 kg ... [more ▼]

Growth-related changes in pulmonary function values (PFV) of cattle were investigated by a cross-sectional study of 40 healthy Dutch Friesian cattle, 3 days to 13 years of age and weighing 37 to 660 kg. Technical and methodologic procedures and body conformation and condition were standardized. A regression analysis was done with 4 independent variables (body weight, thoracic perimeter, body surface area, and age) and with PFV measured in this study. Ventilation values, dynamic lung compliance, and viscous work of breathing changed linearly with somatic growth. Respiratory frequency, total pulmonary resistance, and arterial oxygen tension showed an exponential relationship with all the independent variables. On the other hand, intrapleural pressure values were weakly correlated with body size indexes. The most important growth-related changes in PFV occurred at approximately 1 year of age. A significant (P less than or equal to 0.05) difference between immature and mature cattle was shown for the blood-gas values and the specific values of the breathing mechanics. The dynamic lung compliance/lung weight was lower and the total pulmonary resistance X minute volume was higher in cattle than in other domestic mammals. The regression equation, giving the best fit of the data, was selected for each PFV. [less ▲]