Brachionus plicatilis tolerance to low oxygen concentrations

1989

Tolerance to low oxygen concentrations is expected in Brachionus plicatilis, a rotifer adapted to live in saline warm waters. The population dynamics of a clone of this species, isolated from an endorreic saline lake, was studied under controlled laboratory conditions. Although their growth and metabolism is extremely reduced, B. plicatilis populations are able to maintain relatively high-density populations (a mean of 35 ind ml−1) in oxygen concentrations below 1 mgl−1, for more than one month. Major features of population growth related to oxygen are discussed.

Carte scolaire et orientation en fin de 5ème

1989

International audience; Cet article propose une étude empirique de l'impact de la carte scolaire sur les orientations en fin de 5è. Il souligne la nécessité d'inscrire cette interrogation dans un cadre analytique plus large, prenant en compte l'ensemble des sources de variations, qu'elles soient de nature individuelle, ou propres au contexte concret de scolarisation (établissement, classe). Il s'avère d'une part que les différenciations inter-établissement (nettes des caractéristiques individuelles de leur public) sont en moyenne modérées, bien que substantielles pour les élèves moyens, et d'autre part, que ces différences inter-établissements ne proviennent que pour une part en moyenne ass…

A review of some antimicrobial compounds isolated from medicinal plants reported in the literature 1978–1988

1989

This paper reviews the literature on recent antimicrobial plant products (1978–1988) and medicinal plants used for the treatment of infectious diseases. The review includes accounts of extracts, essential oils and other active principles isolated from plants that have been used in folk medicine as antimicrobial agents. The name and part of the plants studied, the spectrum of activity, type of active compounds and methods used are discussed, as are their mechanisms of action.

Carbohydrates as chiral templates: Diastereoselective Ugi synthesis of (S)-amino acids using O-acylated D-arabinopyranosylamine as the auxiliary

1989

Abstract Enantiomerically pure (S)-amino acids are synthesized via a highly diastereoselective Ugi reaction using 2,3,4-tri-O-pivaloyl-α-D-arabinopyranosylamine as the chiral template.

La recepción de la filosofía kantiana y la entrada de Fichte en la especulación

1989

Este artículo se deriva de la difícil vinculación de los núcleos doctrinales que recorre toda la obra de Fichte, pero que es más evidente en la Grundlage der gesamten Wissenschaftslehre, heredera directa de los compromisos adquiridos por Fichte y antes detallados: Cómo es posible casar un sistema absoluto de estructura spinozista - con el peligro inmediato del mecanicismo, según Jacobi- con· una filosofía que, después de Kant, quiere ser la filosofía de la libertad? Sin duda alguna se trata de una cuestión importante por cuanto apunta directamente a la propia razón del ser de la filosofía fichteana. Pero el problema puede desmenuzarse aún más y entonces cobra su verdadera dimensión. En efec…

1992 o del equívoco europeo

1989

Les enseignants sont-ils réellement sous-payés ?

1989

International audience

Caracterización y estudio electroquímico en disolución acuosa de los cis-trioxo-complejos de Molibdeno con ligandos aminocarboxílicos : relevancia de…

1989

Jacques Thiboust, notaire et secrétaire du roi et familier de Marguerite de Navarre : amitiés littéraires dans le Berry du "Beau seizième siècle"

1989

Aspectos Ortopédicos en la Hemofilia

1989

The haemophilias are due to a functional coagulopathy ( either factor VIII, IX or factor VIII-platelet defiency ). Because to musculoskeletal a cu te haemorrhages, young and elderly patients develop structural deformities. Between 1981-1986, 194 patients ( 499 admission) werw admitted to the Nuffield Orthopaedic Centre in Oxford. In this paper the authors present the treatment carried out in these patients.

En alas de la danza: Miami Vice y el relato terminal

1989

La televisión ha logrado en Miami Vice (aunque esta solución probablemente será compaginada con otras muchas) realizar un sueño y una paradoja cruel: un relato que no es itinerario, vacío de trayecto, un relato que avanza tanto más frenéticamente cuanto que no se dirige a ningún sitio, porque su punto de llegada está en cada explosión, en cada unidad, idealmente tan pequeña, tan minúscula como los microchips de que se compone la tecnología punta. No es casual -y vale la pena exagerar un poco- que la metáfora del cosmos en formación aflore en algún episodio de la serie. Una galaxia en formación que recuerda vagamente aquellos Lone Drivers de los últimos spots publicitarios de automóviles. "T…

Photoassisted Mechanisms in Heterogeneous Catalysis: The Role of Surface OH in the Decomposition of Ethanoic Acid on Magnesium Oxide

1989

The photodecomposition of adsorbed ethanoic acid was studied on a number of pure and mixed insulator and semiconductor systems having a wide range of acid-base features. MgO appeared to be much more active than any other oxide when oxygen was not present in the reactant mixture. On the basis of infrared, U.V.-Vis. reflectance and photoluminescence data it is suggested that in this case the surface hydroxy-groups which are known to absorb at wavelengths longer than 300 nm are involved in the photodecomposition process.

The synthesis of double-calixarenes

1989

Abstract Macrocyclic molecules consisting of two calix[4]arene moieties linked via their p-positions by one 1, two 2 or four 3 aliphatic chains were synthetized for the first time.

Low Viscosity of Densely and Highly Polymerized Human Hemoglobin in Aqueous Solution — the Problem Of Stability

1989

In case of chronic and acute tissue oxygen deficit it is of advantage to have an artificial oxygen carrying blood substitute in order to support a least temporarily blood function. From a physico-chemical point of view an artificial oxygen carrying blood substitute must meet 4 main requirements at the desired concentration.

Mycénien da2-pu-ri-to, de-re-u-ko : une seule question de phonétique

1989

Mycénien da2-pu-ri-to, de-re-u-ko : une seule question de phonétique.

Pigmented esthesioneuroblastoma showing dual differentiation following transplantation in nude mice

1989

Esthesioneuroblastoma (ESTH) is a neuroepithelial-cell-derived neoplasm of the olfactory mucosa composed of homogeneous small round cells which contain neurosecretory granules. Melanin has been detected in such tumours only occasionally. Here we describe a new case of ESTH with divergent differentiation. The primary neoplasm was found in a 67 year-old female, involving the left nasal and maxillary sinus; she died of cerebral metastasis ten months after diagnosis. Histologically only small round cells were seen, with S-100 and NSE positivity. Electron microscopy revealed neurosecretory granules and filaments, as well as the occasional presence of melanosomes. A nude mice xenograft line has b…

Structure elucidation by ion-molecule new reaction. A new approach for GC-MS applications

1989

International audience

Evaluación Biológica del Líquido Sinovial

1989

The FN promotes macrophage adherence, and is chemotactic for fibroblasts. These proporties sugest a role for FN in the modulation of joint inflammation. Other way it seemed that this protein concerned in the organization and repair of damaged or imflammed articular tissues. 98 synovial fluids speciments were evaluated. 56 postraumatic arthropaties, 26 arthrosis and 16 reumathoid arthritis. The authors have considered as parameters oflaboratory: proteins, G. A and M Immunoglobulins, C3 and C4 and FN. A statiscally significative medium increase appeared between de FN values arthritis reumathod's synovial fluids (583,5 ±2 142,8) when it is compared with postraumatic arthropaties (363,8 ±214,5)…

Neue technische und methodische Entwicklungen in der Chirurgie: Maschinelle Nahttechniken

1989

Die maschinelle Naht ist moglich mittels linearer, circularer und sogenannter Anastomosierungsgerate. Bei linearen Geraten werden Klammern aus Metall und Kunststoff verwandt, circulare Stapler arbeiten mit Klammern oder mittels Kompression (Murphy-Prinzip). Ein Vorteil der Stapler- gegenuber der Handnaht (ohne Berucksichtigung des Zeitgewinns) findet sich beim unkomplizierten und effektiven Duodenal- und Bronchusverschlus sowie bei Oesophagus- und Rektumanastomosen. Zukunftstrachtig scheint die klammerlose Kompressionsanastomose zu sein. Ihre Vorteile: keine Fremdkorper, weiteres Lumen, keine Nachblutung. Die eigenen Ergebnisse mit Staplern (1987–1988) zeigen ihre Uberlegenheit: 3 Insuffizi…

Impact of CT and MR on the Diagnostic Evaluation of Neurologic and Neurosurgical Diseases

1989

Today CT and MR are considered to be the most important and most reliable methods for the diagnosis of brain tumors. The sensitivity of these modalities in the detection of intracranial tumors approaches 100%. The extraordinary value of both methods is based not only on this high detection rate but also on their ability to localize tumors in relation to vital centers, assess their mass effect, and establish the tissue type of the lesion (= specificity).

Analysis of Chromatin Structure and Composition

1989

Introduction Biochemistry, like many other sciences, is currently undergoing increasing specialization which is thought to be unavoidable because of the rapid progress within this field. Obviously education in Biochemistry and Molecular Biology is also affected. Consequently, the student may lose the ability to integrate his knowledge, which should be a requirement during the training of a scientist. The solution to this problem is quite easy in the case of theoretical courses because, here, the lecturer may include several 'integrative lessons' which give a global view of previously explained facts and place them within the general context of the course. However, in practical courses it is…

A decidable word problem without equivalent canonical term rewriting system

1989

We present a weak associative single-axiom system having the following property: the word problem is decidable with an efficient algorithm even though there does not exist any finite equivalent canonical term rewriting system.

Versorgung langstreckiger distaler Harnleiterdefekte durch Boari-Hitch und ileoileale Blasenaugmentation

1989

Bei langstreckigem distalen Harnleiterdefekt und geringer Blasenausgangskapazitat oder bestehender Detrusorpathologie sind Verfahren wie alleiniger Psoas-Hitch [6] oder Blasenlappen nach Boari [2] unzureichend. Zwar uberbrucken sie den Harnleiterdefekt, es resultieren jedoch bei kleiner Kapazitat hohe Blaseninnendrucke, die zum moglichen Reflux trotz Antirefluxplastik oder zur Inkontinenz fuhren konnen. Die Losung des Problems stellt die Boari-Hitch-Technik mit zusatzlicher ileo-ilealer Blasenaugmentation dar.

Wichtige Symptome und pathophysiologische Begriffe

1989

Verzogerte Erschlaffung der Muskulatur nach willkurlich, elektrisch oder mechanisch ausgeloster Muskelkontraktion. Muskelaktivitat verringert die Myotonie meistens (Ubungseffekt).

The different redox-activity of dianthrylbenzene and dianthrylbiphenyl

1989

Abstract The reduction of dianthrylbenzene and dianthrylbiphenyl to stable tetraanion salts is described by NMR spectroscopy and cyclic voltammetry. The significantly different Coulomb interactions between the anthracene units are compared with those in dianthrylalkanes.

Observations Regarding Choice Behaviour in Interactive Multiple Criteria Decision-Making Environments: An Experimental Investigation

1989

Many interactive procedures have been developed for solving optimization problems having multiple criteria. In such procedures, an exploration over the feasible or efficient region is conducted for locating the most preferred solution. As Steuer (1986) notes, interactive procedures are characterized by phases of decision-making alternating with phases of computation. Generally a pattern is established that we keep repeating until termination. At each iteration, a solution, or group of solutions, is generated for a decision-maker’s (DM’s) examination. Based on the examination, the DM inputs information to the solution procedure in the form of tradeoffs, pairwise comparisons, aspiration level…

Salvo, De la Pintura. En el estilo de Wittgenstein

1989

Se explicitan las consideraciones de Salvo sobre el juego de lenguaje de la pintura y los juicios de valoración estética con sus supuestos wittgensteinianos, especialmente con los análisis de Wittgenstein en Sobre la Certeza acercade las proposiciones gramaticales o pseudo-impíricas que forman parte de la Imagen del Mundo

Analyse de la genèse temporelle des trajectoires scolaires

1989

Analysis of the development of schooling routes in the course of time. - The authors present an empirical analysis of two fundamental questions in the field of knowledge and action : what are the respective parts : 1) of the primary and secondary school ; 2) of educational and institutional phenomena in the explanation of social differences of scolarity ? They conclude with a methodological thinking about the empirical analysis of educational phenomena which needs to take account of time.

Luxación y fractura-luxación posterior de hombro

1989

Se: presentan 5 casos de luxación posterior de hombro; dos de ellos corresponden a fractura luxación. La etiología en todos fue traumática. Se analiza los diferentes mecanismos lesionales las manifestaciones clínicas y los signos radiográficos para tratar de evitar que esta lesión pase desapercibida. Finalmente se discute su tratamiento y pronóstico.

Un krauso-institucionalista de última hora, José Deleito y Piñuela : vida, obra y pensamiento

1989

Hétérochronies du développement chez des foraminifères crétacés: Exemples et réflexions

1989

Resume Differentes modifications de l'ontogenese (neotenie, acceleration, hypermorphose), associees a des innovations, sont illustrees chez des foraminiferes planctoniques et benthiques de l'Aptien-Albien du Bassin de Paris.

Sobre la didáctica del texto expositivo

1989

La omnipresencia del texto expositivo en el ámbito escolar, tanto en el discurso del profesor como en el de los alumnos, constituye una razón importante para que pase a ser objeto de enseñanza y aprendizaje en la clase de lengua, no como información sobre la exposición ni como simple adiestramiento práctico, sino como trabajo de análisis y producción de textos. Ante las frecuentes quejas sobre la pobreza de vocabulario de los alumnos, la falta de orden en la expresión de sus ideas y, en general, sobre su poca destreza en la exposición oral y escrita, conviene señalar que estas habilidades que echamos de menos en nuestros alumnos se pueden enseñar y, si no se enseñan, no debe extrañarnos que…

Le iscrizioni cristiane di Roma

1989

Análisis de las inscripciones cristianas de Roma dividido en tres apartados: 1.-Estado de la cuestión de los estudios sobre el tema, aportando los principales elencos y obras que tratan dichas inscripciones, minuciosamente comentados. 2.- Estudio de las inscripciones detallando sus características externas (tipos de monumentos, materiales usados, técnica de ejecución, tipo de letra) y las internas (fórmulas,símbolos).También se analiza el contenido indicando los nombres de aparición más frecuente, edad de los difuntos, relación de éstos con los que les dedican las inscripciones, etc. Todo ello explicado dentro de unos condiciona­mientos sociales concretos, lo cual permite establecer la comp…

Restriction fragment polymorphisms of the HLA-DR, HLA-DQ, and insulin gene regions in IDDM: The GAW5 data

1989

The primary aim of the insulin-dependent diabetes mellitus (IDDM) component of Genetic Analysis Workshop 5 (GAW5) was to collect and analyze new data on DNA polymorphisms closely linked to the HLA-D region and the insulin gene. The probes and restriction enzymes described here were used by all ten participating labs, and the data from Southern blotting were interpreted and reported according to conventions developed for the Workshop. These DNA data on members of 94 families with two or more IDDM sibs constitute the largest such sample available. The data were used in most of the analyses presented at the Workshop meeting, and are available on request.

Redescription ofOdhneriella subtila (Skrjabin, 1959) (Digenea: Campulidae) from the intestine ofGlobicephala melaena (Traill, 1809) (Cetacea: Delphin…

1989

During parasitological investigations of long-finned pilot whales,Globicephala melaena (Traill, 1809), in the Faroe Islands, the trematode speciesOdhneriella subtila (Digenea: Campulidae), parasitising the small intestine, was detected. Skrjabin's (1959) original description of this species was based on a single individual. The collection and availability for study of several thousands of specimens permitted the redescription of this campulid and the noting of some new morphological characters. This trematode is reported for the first time from the long-finned pilot whale, and the Atlantic Ocean is a new locality record.

Continent urinary diversion and bladder augmentation in children: the Mainz pouch procedure.

1989

The formation of a bowel reservoir of large capacity at low pressure by using small and large bowel (ileocaecal segment) has proved reliable for achieving continent urinary diversion (n = 80), for bladder augmentation (n = 42) as well as for total bladder replacement (n = 24). Encouraged by the results we obtained in our adult patients, we have used this technique during the last 3.5 years in 29 children. Indications for urinary diversions in children have been: neurogenic bladder with diplegia (n = 8), bladder exstrophy (n = 2), traumatic loss of the bladder (n = 1), urogenital sinus (n = 1) and rhabdomyosarcoma of the prostate or bladder (n = 2). Bladder augmentation was indicated in 6 ch…