bundle behaviour during short-circuit fault. Influence of insulating hardware on snatch effect.

in Proceedings of the 3d ESCC (1988, October)

Simulation of short-circuit mechanical effects in twin bundle busbars in substation is presented. It includes the analysis of the behaviour of end span insulator and hardware during the phenomenon.

Des traces de glace de ségrégation dans la grotte de Remouchamps (Belgique) : conséquences en ce qui concerne la sédimentation et la paléoclimatologie

in Annales de la Société Géologique de Belgique (1988), 111

In countries with a modern temperate climate, the extent of former permafrost is generally estimated from the observation of ice wedge casts, remnants of pingos and palsas, and periglacial involutions ... [more ▼]

In countries with a modern temperate climate, the extent of former permafrost is generally estimated from the observation of ice wedge casts, remnants of pingos and palsas, and periglacial involutions. These features give no indication at all about the depth of permafrost and are ineffective in identifying the limits of former permafrost. A new tool for this research may be found in caves. We already know that speleothems did not grow -- or grew little — during the colder periods of the last glaciation, probably because of the impervious nature of the frozen ground. The discovery, in the Remouchamps Cave, of the marks of segregation ice in loose fills proves that the temperature did fall below 0°C. Only one cycle of freeze/thaw would have been sufficient to create these marks wich have been preserved because there was indeed little biological activity in this environment. The temperature in such caves is generally very close to the mean annual temperature outside the caves. This evidence will thus be useful for tracing the southern limit of the permafrost in Europe. When the permafrost thawed, the melting of the ice caused mass movements in the cave sediments. The ice had blocked some passages and water levels rose to abnormally high levels, depositing sediments at these levels. [less ▲]

La fouine (Martes foina)

Learning material (1988)

Preparation of reproducible alkaline phosphatase-antibody conjugates for enzyme immunoassay using a heterobifunctional linking agent

in Analytical Biochemistry (1988), 172(2), 392-396

Conjugates of alkaline phosphatase (AP) and mouse monoclonal immunoglobulins G (IgG) were prepared by means of the heterobifunctional linker, N-succinimidyl 3-(2-pyridyldithio)-propionate. The efficiency ... [more ▼]

Conjugates of alkaline phosphatase (AP) and mouse monoclonal immunoglobulins G (IgG) were prepared by means of the heterobifunctional linker, N-succinimidyl 3-(2-pyridyldithio)-propionate. The efficiency of such conjugates can be improved by optimizing the degree of substitution of IgG and AP. We have determined conditions yielding better performing conjugates than those synthesized by methods described previously. Moreover, the results obtained with the technique presented here are quite reproducible with all four monoclonal antibodies tested. [less ▲]

Des murs, un fleuve

Learning material (1988)

Comparison of conjugation procedures for the preparation of monoclonal antibody-enzyme conjugates

in Journal of Immunological Methods (1988), 111(2), 261-270

Four monoclonal antibodies belonging to different subclasses and with differing isoelectric points were coupled to horseradish peroxidase (HRP) and alkaline phosphatase (AP) using various conjugation ... [more ▼]

Four monoclonal antibodies belonging to different subclasses and with differing isoelectric points were coupled to horseradish peroxidase (HRP) and alkaline phosphatase (AP) using various conjugation procedures. The conjugates were tested by enzyme immunoassay and their efficiency was characterized by the antibody and enzyme concentrations needed to obtain an arbitrary OD value. The suitability of antibody for conjugation through NH2 groups was tested by fluorodinitrobenzene (FDNB). HRP conjugates were produced by two variants of the sodium periodate procedure and two variants of the glutaraldehyde method, as well as by the heterobifunctional linker N-succinimidyl 3-(2-pyridyldithio)pro-pionate (SPDP). Two of the four antibodies were coupled by a third variant of the periodate method, through their carbohydrate moieties. The periodate-mediated conjugations, using sugar moieties on the enzyme, provided the most efficient HRP conjugates, regardless of the antibody subclass or isoelectric point. The glutaraldehyde procedures consistently gave the worst results. AP conjugates were prepared using the same methods. The most efficient and reproducible AP conjugates with all four monoclonal antibodies were obtained using the SPDP procedure. The efficiency of the other methods differed from one antibody to another. [less ▲]

Introduction à la journée d'étude "sécurité dans les déplacements en milieu urbain

in Yans, Raymond (Ed.) Journée d'étude sur la sécurité dans les déplacements en milieu urbain (1988, June 14)

Study of AG Carinae. I - The 1977 spectrum of the star

in Astronomy and Astrophysics. Supplement Series (1988), 73

Spectroscopic observations of the variable P Cygni-like star AG Car have been obtained in February 1977. At this epoch, the star was in a relative minimum phase (V = 7.6) observed during a long and ... [more ▼]

Spectroscopic observations of the variable P Cygni-like star AG Car have been obtained in February 1977. At this epoch, the star was in a relative minimum phase (V = 7.6) observed during a long and comparatively quiet period of intermediate brightness. The spectrum displays prominent P Cygni lines of He I, Si III, N II and Fe III. The corresponding equivalent spectral type is B2-3 Ib. The presence of an outward accelerated envelope with a multiple shell structure is confirmed. The observation of broad [Fe II] emission lines, in contrast with the absence of permitted ones, implies the presence of a low density shell expanding at about 200 km/s. [less ▲]

The SMC compact blob N 81 - A detailed multi-wavelength investigation

in Astronomy and Astrophysics (1988), 195

The physical characteristics of the compact Small Magellanic Cloud (SMC) H II region N 81 are investigated using several observational techniques with various telescopes at ESO, namely CCD, Image ... [more ▼]

The physical characteristics of the compact Small Magellanic Cloud (SMC) H II region N 81 are investigated using several observational techniques with various telescopes at ESO, namely CCD, Image Dissector Scanner, and Reticon high, medium, and low resolution spectroscopy in the 3700-10,000 A range; CCD imaging; and UBVRI and JHK photometry. Compared to the SMC blobs N 88 A and the LMC N 160 A 1, N 81 was found to be neither dense nor reddened. It is suggested that the nebula N 81 is excited by one star of about 60 solar masses, the absolute visual magnitude of which was derived to be equal to -5.1. The high-resolution profile of N 81 at H-beta was decomposed into its various components, with the most probable three-dimensional turbulent velocity in N 81 estimated to be about 3 km/s. The chemical abundances of He, O, N, Ne, S, and Ar were computed and compared with the mean values available for the SMC. [less ▲]

The Palmomental Reflex in Parkinson's Disease. Comparisons with Normal Subjects and Clinical Relevance

in Archives of Neurology (1988), 45(4), 425-7

We tested 356 normal subjects and 109 parkinsonian patients for the palmomental reflex. The total incidence of the reflex was 16.3% in normal subjects, increasing with age. In parkinsonian patients, the ... [more ▼]

We tested 356 normal subjects and 109 parkinsonian patients for the palmomental reflex. The total incidence of the reflex was 16.3% in normal subjects, increasing with age. In parkinsonian patients, the overall incidence of the reflex was 71.5%, without clear effect of age. A positive correlation was found between degree of akinesia and incidence as well as intensity of the reflex. In the dyskinetic patients, the reflex was seldom elicited, and, if so, it was small. Modifications of the characteristics of the response could be disclosed in parallel with variations of the patient's clinical status. These findings suggest that the presence of a palmomental reflex in parkinsonian patients could indirectly reflect the decrease of dopaminergic activity in the nigrostriatal pathways. [less ▲]