Karcinomi debelog crijeva te adenomi i njihov odnos u kolonoskopskom materijalu.

in Vojnosanitetski Pregled. Military-medical and Pharmaceutical Review (1985), 42(6), 429-31

Binding of the human glucocorticoid receptor to defined regions in the human growth hormone and placental lactogen genes

in DNA (1985), 4(6), 409-17

An in vitro competition assay was used to investigate whether binding sites for the human glucocorticoid receptor occur in the human genes for growth hormone (hGH) and placental lactogen (chorionic ... [more ▼]

An in vitro competition assay was used to investigate whether binding sites for the human glucocorticoid receptor occur in the human genes for growth hormone (hGH) and placental lactogen (chorionic somatomammotropin, hCS). These genes display 95% sequence homology. Two receptor-binding regions were found in the hGH gene, one of which is located within 290 bp upstream, and one within 251 bp downstream from the transcription initiation site. Two binding regions homologous to those in the hGH gene were found in the hCS gene. The receptor-binding DNA fragment from the structural part of the genes, but not that from their promoter area, contained a sequence homologous to a 15-bp consensus sequence proposed earlier for the glucocorticoid receptor binding site. It is unlikely that the putative difference in glucocorticoid sensitivity between the hGH and hCS genes is accounted for by major differences in glucocorticoid receptor binding pattern. [less ▲]

Analyse séquentielle des interactions verbales d'enfants en situation de communication fonctionnelle

in Scientia Paedagogica Experimentalis (1985), XXII(2), 265-289

Karstification souterraine en milieu saturé

in Annales de la Société Géologique de Belgique (1985), 108

In order to explain the development of caves, considering the slowness of water circulations into the fissures of the limestone, only a chemical action i.e. corrosion can be called upon in most cases ... [more ▼]

In order to explain the development of caves, considering the slowness of water circulations into the fissures of the limestone, only a chemical action i.e. corrosion can be called upon in most cases. However, as saturation is rapidly reached, we consider, in order to extend the dissolution action of underground water, the possibility of dissolution in a saturated environment. [less ▲]

Dependence of the density distribution of Pb-208 on the occupation probabilities of the shell model orbits

in Nuclear Physics A (1985), 440

Space-like field in a relativistic local density approximation

in Physics Letters B (1985), 156

Quel paradigme adopter dans les recherches empiriques consacrées à la qualité de vie dans les milieux préscolaires

in Canadian Journal of Research in Early Childhood Education (1985), 1(2), 183-195

High performance gel filtration as a tool for the monitoring of the purification steps of the Na channel protein

in Archives Internationales de Physiologie et de Biochimie (1985), 93

In vitro degradation of the four isomers of Soman in human serum

in Biochemical Pharmacology (1985), 34

Les déprivations en question !

in Observatoire : Revue d'Action Sociale & Médico-Sociale (1985), 5

Fixed interval performance in a large sample of rats (N=113) : interindividual differences

in Psychologica Belgica (1985), 25(1), 73-79

Hundred and thirteen male adult albino rats (Wistar) have successively been submitted to 3 CFR, 3 FI 30, 3 FI 60, 3 FI 90 and 40 FI 120 seconds sessions. The daily sessions lasted in every case 30 minutes ... [more ▼]

Hundred and thirteen male adult albino rats (Wistar) have successively been submitted to 3 CFR, 3 FI 30, 3 FI 60, 3 FI 90 and 40 FI 120 seconds sessions. The daily sessions lasted in every case 30 minutes. Daily distributions of the Curvature Indice (Fry, Kelleher & Cook, 1960) values showed that the mean value increased up to a stabilization point at the 20th FI 120 seconds session and that the inter-individual differences as estimated by the standard deviation increased progressively throughout the session series. Rank correlations (Kendall Tau t) computed between individual Curvature Index values from adjacent or remote sessions were highly osgnificant and showed that the level of adjustment to the FI schedule early in training has a predictive value. [less ▲]

Un cas d'envenimation mortelle avec hyperfibrinolyse par piqûre multiples de guêpes (Vespa Crabro L.)

in Revue Médicale de Liège (1985), 40

Observation d'une envenimation mortelle par piqûres multiples de Vespa crabo, chez un homme de 58 ans. Celle-ci se marque par un collapsus cardiovasculaire accompagné d'incoagulabilité sanguine par ... [more ▼]

Observation d'une envenimation mortelle par piqûres multiples de Vespa crabo, chez un homme de 58 ans. Celle-ci se marque par un collapsus cardiovasculaire accompagné d'incoagulabilité sanguine par hyperfibrinolyse isolée. La résorption d'enzymes protéolytiques renfermées dans le venin inoculé à doses élevées, explique l'attaque élective du fibrinogène circulant. Ce pouvoir lytique rapproche le venin de Vespa crabro de celui de certains serpents. [less ▲]

Parturition as a stimulus of IBR virus reactivation.

in Veterinary Record : Journal of the British Veterinary Association (1985), 116(22), 599-600

Nonadiabatic Unimolecular Reactions of Polyatomic Molecules

in Journal of Physical Chemistry (1985), 89

The nonadiabatic couplings which arise when two potential energy surfaces of a polyatomic molecule get close in energy can be classified as follows: (A) avoided crossings, (B) genuine intersections (Jahn ... [more ▼]

The nonadiabatic couplings which arise when two potential energy surfaces of a polyatomic molecule get close in energy can be classified as follows: (A) avoided crossings, (B) genuine intersections (Jahn-Teller and conical), (C) glancing intersections (Renner-Teller interactions). The characteristics of the potential energy surfaces in the adiabatic and diabatic representations are discussed for each case. The three coupling cases differ in the structure of the Hamiltonian matrix. When the latter is written in the diabatic representation, it is meaningful to retain the leading term only in its power series expansion. This gives rise to a so-called minimum-order model which is found to be surprisingly accurate (at least in a restricted zone of nuclear coordinates) when compared to the results of ab initio calculations. The characteristic features of each coupling case can only be understood in a two-dimensional configuration space, Le., when two nuclear degrees of freedom, often with different symmetry properties, are explicitly considered. A simple expression of the nonadiabatic transition probability between two electronic states can be worked out in the framework of the minimum-order models. Two-dimensional extensions of the Landau-Zener formula are obtained, which can be used to study the consequences of the anisotropic properties of the coupling. In the case of avoided crossings, only nuclear trajectories having a well-defined direction are able to bring about surface hopping, wheras there exists two active degrees of freedom for conical intersections. Hence, nonadiabatic processes which are controlled by genuine intersections are expected to take place faster than those controlled by avoided crossings. [less ▲]

Re-evaluation of the site of transcription in Ehrlich tumour cell nucleoli.

in Biology of the Cell (1985), 54(1), 57-64

Recent electron microscopic immunolocalization studies (Scheer and Rose, 1984) indicated that RNA polymerase I is located in, and probably confined to, the fibrillar centres of the nucleoli. This ... [more ▼]

Recent electron microscopic immunolocalization studies (Scheer and Rose, 1984) indicated that RNA polymerase I is located in, and probably confined to, the fibrillar centres of the nucleoli. This conclusion appears to be in contradiction to previous autoradiographic studies reporting that transcription of rRNA genes takes place in the dense fibrillar component. Despite the fact that rRNA transcription occurs in the dense fibrillar component of Ehrlich tumour cell nucleoli, we show in the present paper that dense fibrillar component containing rapidly labelled RNA can be visualized not only around but also inside the fibrillar centres. [less ▲]

L’enseignement assisté par ordinateur de la syntaxe latine

in Le Micro-Professeur (1985), II(1), 76-81

Elizabeth Greenleaf: An Appraisal

in Canadian Folk Music Journal = Revue de Musique Folklorique Canadienne (1985), 13

A critical assessment of E.B. Greenleaf and G.Y. Mansfield's collecting and published folksong collection (Ballads and Sea Songs of Newfoundland, 1968) on the basis of Greenleaf's manuscript notes and ... [more ▼]

A critical assessment of E.B. Greenleaf and G.Y. Mansfield's collecting and published folksong collection (Ballads and Sea Songs of Newfoundland, 1968) on the basis of Greenleaf's manuscript notes and letters. [less ▲]

Anomalous missing-pT events at the CERN ppbar collider: The standard model re-examined

in Physics Letters B (1985), 157

Diode laser measurements of N2-broadened line widths in the ν1 band of OCS

in Canadian Journal of Physics (1985), 63

A tunable diode laser spectrometer has been used to perform measurements of pressure-broadening coefficients for 20 vibration-rotation lines in the ν₁ band of [sup]16[/sup]O[SUP]12[/SUP]C[SUP ... [more ▼]

A tunable diode laser spectrometer has been used to perform measurements of pressure-broadening coefficients for 20 vibration-rotation lines in the ν₁ band of [sup]16[/sup]O[SUP]12[/SUP]C[SUP]32[/SUP]S perturbed by N[sub]2[/sub]. Calculations of these broadening coefficients have been carried out on the basis of the Anderson-Tsao-Curnutte theory and by considering an improved semiclassical impact theory. [less ▲]

Interaction of androgens and estrogens in the control of sexual behavior in male Japanese quail.

in Physiology & Behavior (1985), 35(2), 157-66

A series of 4 experiments was performed to study the relative contribution of androgens and estrogens in the activation of sexual behavior in castrated male quail. The synthetic androgen methyltrienolone ... [more ▼]

A series of 4 experiments was performed to study the relative contribution of androgens and estrogens in the activation of sexual behavior in castrated male quail. The synthetic androgen methyltrienolone (R 1881) which is not metabolized in androgen target tissues activated sexual behavior in castrated birds and at the dose level of 0.5-1 mg/day/animal had the same potency as testosterone (T). However R 1881 was much more active than T in the induction of cloacal gland growth and activation of crowing, two typically androgen-dependent responses. This suggests that sexual behavior is not controlled by exactly the same mechanism as crowing or cloacal gland growth. In another experiment, estradiol (E2) alone activated sexual behavior but it is only at very high doses which had clear toxic effects that a significant behavioral activation could be observed. This questions the role of E2 as the physiological agent stimulating copulation in intact birds unless it is assumed that centrally administered E2 would be much more active compared to peripheral E2 which is exposed to a very intense peripheral catabolism. In the last two experiments, a clear synergism could be detected between 5 alpha-dihydrotestosterone (5 alpha-DHT) and E2 in the activation of sexual activity and doses of hormones could be defined which had almost no activity by themselves but significantly stimulated sexual behavior when given simultaneously. It was however impossible to define a hormonal treatment with T metabolites which restored behavior to its precastration level, a result very easily achieved with T treatments. Taken together, these data suggest that activation of sexual behavior in quail does not depend only on E2, nor 5 alpha-DHT nor even on their combined action. Considering that specific T receptors which probably do not bind 5 alpha-DHT are present in the brain, it would seem justified to reconsider the possible role played by T itself in the activation of behavior. [less ▲]

Mise au point d'une formulation d'un gel topique à base de Dermovate lotion

in Journal de Pharmacie de Belgique (1985), 40(5), 343-344

Workers self-pacing in hot conditions: a case study

in Applied Ergonomics (1985), 16(2), 85-90

It is not always possible in hot environments, to determine safe work-rest regimens based upon heat stress criteria. Is it then a good health policy to rely upon the self-pacing of the workers? To address ... [more ▼]

It is not always possible in hot environments, to determine safe work-rest regimens based upon heat stress criteria. Is it then a good health policy to rely upon the self-pacing of the workers? To address this question, we observed the spontaneous work-rest cycles of seven masonry workers allocated to the maintenance of a float-glass furnace and the workers' heart rate and rectal temperature were continuously monitored. Results showed that the regimens adopted by the workers were poorly related to physiological parameters. The duration of each heat exposure was significantly related to the worker aerobic capacity, but not to the heart rate level reached at the end of the working period. Due to self-pacing of the task, heart rates and rectal temperatures remained within acceptable limits for all workers but one, even though these workers were rather old and had a rather low physical capacity. These favourable results may be ascribed to a spontaneous limitation of the effective working time to about 25% of the shift duration and to the fact that subjects worked, in pairs alternately, to perform the task. It is concluded that self-regulation of the work-rest cycles can be an effective means to protect the workers exposed to hot conditions from an excessive physiological strain, providing that the task has no urgent character and does not involve productivity incentives, and that the workers are well trained to their job. [less ▲]

Heart structure and ventricular ultrastructure of hemoglobin- and myoglobin-free icefish Channichthys rhinoceratus

in Cell & Tissue Research (1985), 242

Modélisation de spectres de contraintes et application à la résistance en fatigue

in Revue de la soudure (1985), 2

Petrogenesis of monzonoritic dykes in the Egersund-Ogna anorthosite (Rogaland, SW Norway)

in Contributions to Mineralogy & Petrology (1985), 90

Effect of salt depletion on sodium ion transport from human erythrocytes

in Wiener Klinische Wochenschrift. Supplementum (1985), 63

This study was realized to test De Wardener's hypothesis on the presence of a plasmatic and natriuretic factor in essential hypertension. By an indirect approach consisting of modification of plasma ... [more ▼]

This study was realized to test De Wardener's hypothesis on the presence of a plasmatic and natriuretic factor in essential hypertension. By an indirect approach consisting of modification of plasma volume and sodium pool in chronic renal failure and primary hypertension with, at the same time , measurements of ionic flux variations in human erythrocytes, we provide some arguments to confirm the presence of such a factor in hydrosaline overloaded uraemic patients and in "salt-sensitive" essential hypertensive subjects. [less ▲]

The temporal regulation of behavior: A comparative approach

in Behavioral Processes (1985), 10

Urbanisme à Liège depuis 1830

in Environnement (1985), 2/85

Cloning of the nitrogen permease regulator gene NPR1 of Saccharomyces cerevisiae.

in Archives Internationales de Physiologie et de Biochimie (1985), 93

Immunological and structural relatedness of catabolic ornithine carbamoyltransferases and the anabolic enzymes of Enterobacteria.

in Journal of Bacteriology (1985), 161

La peste porcine africaine

in Annales de Médecine Vétérinaire (1985), 129

Laminin promotes cerebellar granule cells migration in vitro and is synthesized by cultured astrocytes.

in Developmental Neuroscience (1985), 7(5-6), 278-85

Newborn rat cerebellum microexplants have been used as a model to study neuronal migration. Laminin in a substrate-bound form modifies extensively the migratory behavior of the neurones, an effect which ... [more ▼]

Newborn rat cerebellum microexplants have been used as a model to study neuronal migration. Laminin in a substrate-bound form modifies extensively the migratory behavior of the neurones, an effect which is blocked if antilaminin antibodies are present during the assay. 35S methionine incorporation followed by SDS-PAGE electrophoresis, fluorography and immunoprecipitation with antilaminin antibodies allowed to demonstrate that laminin is synthesized and secreted by cultured newborn rat cerebellum as well as by cultured newborn rat cerebral cortex astrocytes. [less ▲]

Anaesthetic risks in osteoarticular disorders

in Clinical Rheumatology (1985), 4(1), 30-38

Hématomes cérébraux spontanés et malformations vasculaires cryptique de l'enfant

in Comptes rendus de la Société Belge de Neurologie Infantile (1985)

Hormonal correlates of gonadal regression and spontaneous recovery in Japanese quail exposed to short day-lengths.

in Archives Internationales de Physiologie et de Biochimie (1985), 93(2), 123-33

Adult male Japanese quail were transferred from long to short days. Plasma testosterone and dihydrotestosterone quickly decreased and this endocrine response was followed by a regression of the cloacal ... [more ▼]

Adult male Japanese quail were transferred from long to short days. Plasma testosterone and dihydrotestosterone quickly decreased and this endocrine response was followed by a regression of the cloacal gland, an androgen-target organ. After about a month, a spontaneous recovery of gonadal activity was observed in some but not all birds. It was not associated with obvious shifts in the circadian system. The physiological bases of this spontaneous recovery are discussed as well as the detailed relationships between plasma testosterone and cloacal gland size. [less ▲]

Spécialisation spatiale et dynamisme régional dans l'espace industriel wallon : considérations méthodologiques

in Hommes et Terres du Nord (1985), (2), 110-117

This article is an attempt to explore various methods used to measure spatial specialisations and regional dynamism in wallon industry. At the same time, it treats the variables utilised and the spatial ... [more ▼]

This article is an attempt to explore various methods used to measure spatial specialisations and regional dynamism in wallon industry. At the same time, it treats the variables utilised and the spatial and temporal consequences of the choices. By examining the limits and performances of the various indices utilised, this article will attempt to suggest the use of various methodological tools for a more precise analysis of industrial function. [less ▲]

Sur le milieu de dépôt, l'origine des matériaux et le faciès métamorphique de l'Assise de Tubize (Massif du Brabant, Belgique)

in Bulletin de la Société Belge de Géologie (1985), 94(2), 171-184

In search of Devonian-Carboniferous Boundary.

in Episodes (1985), 8(2), 110-111

Mortality in 504 infants weighing less than 1501 g at birth

in European Journal of Pediatrics (1985), 144

Application of an enzyme-linked immunosorbent assay (ELISA) involving monoclonal antibody for detection of BLV antibodies in individual or pooled bovine milk samples

in Zentralblatt für Veterinarmedizin. Reihe B = Journal of Veterinary Medicine. Series B (1985), 32

Détection de CO2, N2, et CH4 dans les inclusions fluides de quartz d'Ardenne par microthermométrie et microsonde à effet Raman

in Annales de la Société Géologique de Belgique (1985), 108

Bovine leukemia virus : a versatile agent with various pathogenic effects in various animal species

in Revue de l'Institut Pasteur de Lyon (1985)

Transport des immondices par barges spécialisées

in Bulletin de l’Association Internationale Permanente des Congrès de Navigation [Bulletin de l'AIPCN] (1985)

Isolation of follicular dendritic cells from human tonsils and adenoids. III. Analysis of their Fc receptors.

in Immunology (1985), 54(4), 777-84

Follicular dendritic cells (FDC), isolated from human tonsils or adenoids, were tested for their capacity to retain monomeric, aggregated or antigen-bound human antibodies in the absence of serum. FDC ... [more ▼]

Follicular dendritic cells (FDC), isolated from human tonsils or adenoids, were tested for their capacity to retain monomeric, aggregated or antigen-bound human antibodies in the absence of serum. FDC retain fluorescein-labelled heat-aggregated human immunoglobulins, but not monomeric ones nor fluorescein-labelled F(ab')2 in monomeric or aggregated form. Ultrastructural observations showed that colloidal gold-labelled monomeric, or antigen-bound, antibodies directed against tetanus toxoid are retained by dendrites and membrane infoldings of FDC but are never located in cytoplasmic vesicles. This retention was inhibited by incubating FDC with unlabelled aggregated or antigen-bound antibodies. When gold-labelled anti-tetanus toxoid antibodies were incubated in the presence of protein-A before the contact with FDC, a strong reduction of their retention occurred. This further suggested the presence of Fc receptors on isolated tonsillar FDC. Endocytosis was not observed in isolated FDC, even after prolonged incubation in presence of labelled immune complexes: their Fc receptors are, thus, not related to a phagocytic activity as they are in macrophages. Simultaneous ultrastructural labelling of Fc and C3b receptors with colloidal gold particles of different sizes did not reveal any clear relations between these two receptors on the surface of FDC. [less ▲]

Masking of antigenic sites of fibronectin by glycosaminoglycans in ethanol-fixed embryonic tissue

in Histochemistry (1985), 82(2), 169-74

We studied the interaction between glycosaminoglycans (GAGs) and fibronectin in the basement membrane of the epiblast in the chicken blastoderm using testicular-hyaluronidase digestion of GAGs either on ... [more ▼]

We studied the interaction between glycosaminoglycans (GAGs) and fibronectin in the basement membrane of the epiblast in the chicken blastoderm using testicular-hyaluronidase digestion of GAGs either on fixed tissue sections or in vivo after microinjection of the enzyme preparation prior to immunostaining for fibronectin. In the choice of fixatives, special attention was paid to their preservation of GAGs. The controls included alcian-blue staining of serial sections to test the efficiency of the digestion, and incubations in the presence of protease inhibitors to abolish contaminating proteolytic activity in the commercial hyaluronidase preparations. The results indicate that fixation in solutions which preserve GAGs, i.e. ethanolic solutions or aqueous solutions containing cetylpyridinium chloride, allows the immunocytochemical demonstration of fibronectin in the basement membrane of the epiblast at the level of the endophyllic crescent, but masks this glycoprotein at the epithelial-mesenchymal interface. As shown by both approaches, this masking of immunoreactivity is reversible. Moreover, the in vivo clearance of GAGs before fixation shows that the masking at the epithelial-mesenchymal interface is not an experimental peculiarity due to the use of a particular technique, but is the consequence of an interaction between GAGs and fibronectin in that particular area of the basement membrane that is used by mesoblast cells as a substrate for migration. The observation that fibronectin may be masked by GAGs in ethanol-fixed tissue--a commonly used fixation method--may require the re-evaluation of some negative results mentioned in the literature. [less ▲]

L'évapotranspiration effective de différents types de couverts forestiers

in Hautes Fagnes (1985)

Retention of immune complexes by Fc receptors on mouse follicular dendritic cells.

in Scandinavian Journal of Immunology (1985), 21(4), 345-53

Follicular dendritic cells (FDC) are located inside lymph follicles and are mainly characterized by their capacity to retain antigens. We investigated this aspect in mice lymph nodes by using bovine serum ... [more ▼]

Follicular dendritic cells (FDC) are located inside lymph follicles and are mainly characterized by their capacity to retain antigens. We investigated this aspect in mice lymph nodes by using bovine serum albumin (BSA) labelled with 5-nm colloidal gold particles and homologous anti-BSA antibodies bound to 20-nm gold particles. Gold-labelled BSA injected alone in non-immunized mice was only rarely found in FDC cytoplasmic interdigitations. Injected in the form of immune complexes, it was retained by FDC. Antigen-free anti-BSA antibodies injected under similar conditions as immune complexes were always found in draining lymph nodes in the same locations as BSA-anti-BSA immune complexes. F(ab')2 from mouse immunoglobulins linked to colloidal gold particles were very rarely found between the FDC extensions, whereas it was intensely phagocytosed by macrophages. Our study permitted precise ultrastructural localization between FDC cytoplasmic extensions or inside macrophages and other cells of the lymph nodes, but it also pointed out that homologous antibodies linked to colloidal gold particles might be retained by FDC in the absence of antigens. These observations, carried out with colloidal gold, were checked by using 125I-labelled anti-BSA antibodies. Complement activation determinations of gold-labelled antibodies or immune complexes showed that antibodies or immune complexes fixed on colloidal gold particles do not activate the complement. This observation enabled us to conclude that Fc receptors play a significant part in the retention of gold-labelled antibodies or immune complexes by FDC of lymph nodes. [less ▲]

Intestinal absorption and secretion of total and lipid phosphorus in adult sheep fed chopped meadow hay.

in Reproduction Nutrition Developpement (1985), 25(2), 389-397

The flow of total (PT) and lipid (PPL) phosphorus was measured in adult sheep fed meadow hay and fitted with Ivan-Johnston reentrant cannulas in the duodenum (just posterior to the entry of the common ... [more ▼]

The flow of total (PT) and lipid (PPL) phosphorus was measured in adult sheep fed meadow hay and fitted with Ivan-Johnston reentrant cannulas in the duodenum (just posterior to the entry of the common bile and pancreatic duct) and in the terminal ileum. The pattern of plasma, duodenal and ileal PT and P PL specific radioactivity was also studied. The considerable total and lipid P secretion observed between the mouth and the duodenal cannula could be accounted for by salivary and biliary secretions, respectively. This secretion was followed by high absorption in the small intestine and less in the large intestine. A comparison of P specific radioactivities showed that the selective P PL reabsorption occurring in the small intestine could be due to the existence of an entero-hepatic cycle of biliary phospholipids. [less ▲]

Localisation ultrastructurale d'hormones hypophysaires par reaction immunocytochimique sur coupes fines d'adenomes.

in Comptes Rendus des Séances de la Société de Biologie et de ses Filiales (1985), 179(3), 397-402

Human pituitary adenomas were fixed in glutaraldehyde and embedded in epon. Ultrathin sections were incubated either with anti-hGH, anti-hPRL or anti-hLH. They were incubated with second step goat anti ... [more ▼]

Human pituitary adenomas were fixed in glutaraldehyde and embedded in epon. Ultrathin sections were incubated either with anti-hGH, anti-hPRL or anti-hLH. They were incubated with second step goat anti-rabbit immunoglobulins linked to gold particles. Two PRL secreting adenomas, one GH and PRL secreting adenoma, one ACTH secreting adenoma and two non secreting adenomas were studied. The specificity and the limits of the method were discussed in relation with the results obtained in light microscopy with the PAP method. [less ▲]

Stability and accuracy of the UVBY system

in Astronomy and Astrophysics (1984), 141

In order to evaluate the transformation errors for stars of various types and classes, the author has simulated observations made with standard and non-standard equipments. Large deviations which cannot ... [more ▼]

In order to evaluate the transformation errors for stars of various types and classes, the author has simulated observations made with standard and non-standard equipments. Large deviations which cannot be corrected are observed mainly for objects outside the range 0.0 < b-y < 0.4 and in the u filter. The rectangular passbands have many advantages however. They can be very stable and are accurately reproducible. Hence the problem of nontransformable outputs may not exist between such systems. Since many uvby observations are to be collected with such equipments, it could be advantageous to define a new standard "rectangular" uvby system along with the conventional one. [less ▲]