La vie cistercienne hier et aujourd'hui

Book published by Cerf/Zodiaque (1998)

Grazing by large river zooplankton: a key to summer potamoplankton decline? The case of the Meuse and Moselle rivers in 1994 and 1995

in Hydrobiologia (1998)

To explain summer declines in phytoplankton biomass in large rivers, we compared the effect of zooplankton grazing on the planktonic algae of two large European rivers, the Meuse and the Moselle. In situ ... [more ▼]

To explain summer declines in phytoplankton biomass in large rivers, we compared the effect of zooplankton grazing on the planktonic algae of two large European rivers, the Meuse and the Moselle. In situ grazing was measured during two years (1994 and 1995), using the Haney method. Total zooplankton community filtration rates recorded in the river Meuse ranged between 1 and 32% of the water volume filtered per day. A drastic algal decline was observed early July both years and may be explained by high densities of a rotiferdominated zooplankton community (500–700 ind. l􀀀1) with more than 75%of Brachionus calyciflorus. During the summer period in 1994, when grazingwas over 20%, edible algal biomasswas controlled by a diversified rotifer community (up to 2500 ind.l􀀀1), while a nonedible algal assemblage developed. In contrast, phytoplankton biomass remained comparatively lowin the Moselle throughout the lowflowperiod, as did zooplankton numbers duringmost of this time (fewer than 200 ind. l􀀀1 during the summer period). The proportion of crustaceans in this zooplanktonwas rather higher than in the Meuse, and they dominated at times, in biomass as well as in numbers. Nevertheless, measured in situ grazing rates (1–15%) could not explain the low summer algal biomass, even if low filtration rates may at times represent a significant carbon loss for phytoplankton, when and where net algal production was low. As a conclusion, the role of phytoplankton – zooplankton interactions in controlling algal biomass in large rivers is discussed. [less ▲]

Bisphosphonates and osteoporosis treatment in Italy

in Aging Clinical & Experimental Research (1998), 10

Shoshonitic liquid line of descent from diorite to granite: the Late Precambrian post-collisional Tismana pluton (South Carpathians, Romania)

in Lithos (1998), 45

The post-collision late-kinematic Tismana pluton belongs to the shoshonitic series. It is part of a Late Precambrian basement within the Alpine Danubian nappes of the South Carpathians (Romania). This ... [more ▼]

The post-collision late-kinematic Tismana pluton belongs to the shoshonitic series. It is part of a Late Precambrian basement within the Alpine Danubian nappes of the South Carpathians (Romania). This pluton displays an exceptionally complete range of compositions from ultramafic to felsic rocks (granites). Widespread mingling/mixing relationships at all scales give rise to a variety of facies. A liquid line of descent from the diorites to the granites is reconstructed by considering the variation in major and trace elements (REE, Sr, Rb, Ba, Nb, Zr, Hf, Zn, V, Co, Cr, U, Th, Ga, Pb) from 33 selected samples as well as mineral/melt equilibrium relationships. The first step of fractional crystallization is the separation from a monzodioritic parent magma of a peridotitic cumulate similar to the ultramafic rock found in the massif. A possible contamination by lower crustal mafic component takes place at this stage. The second step marks the appearance of apatite and Fe-Ti oxide minerals as liquidus phases, and the third step, saturation of zircon. Mixing by hybridisation of magmas produced at different stages of the evolution along the liquid line of descent is also operating (endo-hybridisation). As depicted by Nd and Sr isotopes, fractional crystallization was combined to an important early contamination by a mafic lower crust in a deep-seated magma chamber and to a later and mild contamination by a felsic medium crust in an intermediate chamber. The mingling essentially occurred during the final emplacement in the high-level magma chamber. The monzodioritic parent magma, identified by major and trace element modelling, is shown by Sr and Nd isotopes to have its source in the lithospheric mantle or in a juvenile mafic lower crust derived from it. The necessarily recent enrichment in K2O and associated elements of the lithospheric mantle is likely to be related to the preceding Pan-African subduction period. The partial melting of this newly formed deep source has to be linked to a major change in the thermal state of the plate. [less ▲]

The Pathophysiology of Migraine: A Review Based on the Literature and on Personal Contributions

in Functional Neurology (1998), 13(1, Jan-Mar), 7-15

Palynostratigraphy of the Jauf Formation in the Ghawar area, Eastern Saudi Arabia

in Al-Husseini (Ed.) Geoarabia (1998)

L1-protein in incipient lymphocyte-depleted graft-versus-host disease. Expression in keratinocytes and coexpression with Factor XIIIa in dermal cells

in Turkish Journal of Dermatology = Dermatopatoloji Dergisi (1998), 7

With the introduction of effective immunosuppressive regimens some cutaneous rashes following bone marrow transplant may appear histologically unremarkable. We report three cases of cyclosporin-abated ... [more ▼]

With the introduction of effective immunosuppressive regimens some cutaneous rashes following bone marrow transplant may appear histologically unremarkable. We report three cases of cyclosporin-abated cutaneous graft-versus-host reaction (GVHR) where the most straightful histologic clue was the epidermal L1-protein (calprotectin) expression revealed by a positive immunolabelling using the Mac 387 antibody. The epidermis looked otherwise normal and inflammatory cells were scant in the dermis. The expression of calprotectin by keratinocytes occurred early in cutaneous GVHR. In addition, CD45RO-positive T memory lymphocytes were exceedingly rare in the dermis while a few Mac 387-positive monocytes coexpressed Factor XIIIa immunoreactivity. Hyperplasia of the Factor XIIIa-positive dendrocytic population was obvious. Calprotectin and Factor XIIIa immunolagellings should be regarded as a diagnostic adjunct in lymphocyte-depleted cutaneous GVHR. Calprotectin positivity of the epidermis is indicative although not specific for such condition. However, its combination with a low lymphocytes/monocytes ratio in the dermis which is enriched in plup dendrocytes is almost diagnostic. [less ▲]

Parathyroid hormone plasma concentration in response to low 25-OH vitamin D circulating levels increase with age in elderly women

in Osteoporosis International (1998), 8(S3), 40

Early clinical experience with subcutaneous naratriptan in the acute treatment of migraine: a dose-ranging study.

in European Journal of Neurology (1998), 5(5), 469-477

Naratriptan is a novel, potent agonist at the 5HT1B/1D receptor. A total of 335 migraine patients were treated in this randomized, double-blind, placebo-controlled, dose-ranging, in-clinic study, to ... [more ▼]

Naratriptan is a novel, potent agonist at the 5HT1B/1D receptor. A total of 335 migraine patients were treated in this randomized, double-blind, placebo-controlled, dose-ranging, in-clinic study, to evaluate the efficacy, safety and tolerability of five doses of subcutaneous (sc) naratriptan (0.5, 1, 2.5, 5 or 10 mg) in comparison with sc sumatriptan (6 mg) and placebo in the acute treatment of a moderate/severe migraine attack. Headache relief [reduction of headache severity from moderate or severe (grade 2/3) to mild or none (grade 1/0)] at 1 and 2 h after each dose, was reported by a statistically significantly higher proportion of patients for all doses of sc naratriptan and sc sumatriptan (6 mg) than for placebo. The percentages of patients with headache relief at 2 h post-dose were: naratriptan (0.5 mg) 65%, (1 mg) 75%, (2.5 mg) 83%, (5 mg) 94% and (10 mg) 91%; sumatriptan (6 mg) 89%; placebo 41%, (P < 0.005). The earliest report of a statistically significant difference compared with placebo for the times assessed was with sc naratriptan (10 mg) at 10 min post-dose (P = 0.023). The percentages of patients reporting adverse events were dose-related; sc naratriptan (0.5 mg) 33%, (1 mg) 29%, (2.5 mg) 43%, (5 mg) 59% and (10 mg) 71%; sc sumatriptan 53%; placebo 22%. There were no clinically significant changes in electrocardiogram (ECG), vital signs or laboratory parameters. Systemic exposure increased proportionally to the dose, the absorption of sc naratriptan was rapid (tmax = 10 min) and the half-life was 5 h. In conclusion, sc naratriptan was an effective and well-tolerated acute treatment for migraine. Copyright 1998 Lippincott Williams & Wilkins [less ▲]

The effect of 2 and 3 years of Raloxifene on vertebral and non-vertebral fractures in postmenopausal women with osteoporosis

in BONE (1998), 23(S5), 174