Deriva nictemeral de macroinvertebrados en el rio Llobregat (Barcelona)

A study on the qualitative and quantitative coniposition of macroinvertebrate drift in the Llobregat river ( N E Spain) is put fonvard. Samples were taken hourly during a 24 hour period in august 1982. The samples were taken with a net of 625 cm. of filtering surface and an opening mesh size of 500 microns, which íiltered 72,1 m3 /h. and collected 75.719 individuals during the sampling period. That means a drift rate of 1.224 indiv./h. and a drift density of 17 indi/m3 . 8 I0/o of the organismes collected were exuviae, mainly pupal chironomid skins (54%) and nimphal ephemeroptera moults (27(Ynj. The remainder percentage of living organisms represents a drift rate of 227 indiv./h. and a drift density of 3.14 indiv./m3. These are intermediate values ifwe compare them with the data published. Sixty per cent of the living drift were chiroiiomids. 17.5 '1 ephemeroptera and 10 (%1 trichoptera; these being the niost iniportant groups. Ofthe 87 species identified in those groups 23 were common in al1 the (7 1 ) samples (Table 1)

Dos combinaciones nuevas y un comentario corologico en el genero Delphinium L.

En el herbario del Conservatorio Botánico de Ginebra (G) existe un pliego perteneciente a los exsiccata de F. Schultz (Herb. Normal, nov. ser., cent. 26, n.° 2503), que suponemos se encuentra también en alguna otra institución botánica, con la siguiente indicación de localidad: «In monte Serra de Marsanto, haud procul ab urbe Olisipone. Lusitania / Sept. 1888 / A.R.da Cuntía.». La identidad del ejemplar no ofrece dudas: la forma del nectario, con el limbo no constreñido abruptamente en la uña, sino suavemente decurrente hacia la base (contorno claviforme), permite diferenciarlo de las especies próximas D. verdunense, D. halteratum y D. gracile

Discordant secular trends in elevated blood pressure and obesity in children and adolescents in a rapidly developing country

BACKGROUND: The effect of the increasing prevalence of obesity on blood pressure (BP) secular trends is unclear. We analyzed BP and body mass index secular trends between 1998 and 2006 in children and adolescents of the Seychelles, a rapidly developing island state in the African region. METHODS AND RESULTS: School-based surveys were conducted annually between 1998 and 2006 among all students in 4 school grades (kindergarten and 4th, 7th, and 10th years of compulsory school). We used the Centers for Disease Control and Prevention criteria to define obesity and elevated BP. The same methods and instruments were used in all surveys. Some 25 586 children and adolescents 4 to 18 years of age contributed 43 867 observations. Although the prevalence of obesity in boys and girls increased from 5.1% and 6.0%, respectively, in 1998 to 2000 to 8.0% and 8.7% in 2004 to 2006, the prevalence of elevated BP decreased from 8.4% and 9.8% to 6.9% and 7.8%. During the interval, mean age-adjusted body mass index increased by 0.57 kg/m(2) in boys and 0.58 kg/m(2) in girls. Mean age- and height-adjusted systolic BP decreased by -3.0 mm Hg in boys and -2.8 mm Hg in girls, whereas mean diastolic BP did not change substantially in boys (-0.2 mm Hg) and increased slightly in girls (0.4 mm Hg). CONCLUSIONS: At a population level, the marked increase in the prevalence of obesity in children and adolescents in the Seychelles was not associated with a commensurate secular rise in mean BP.

Telomerase activation in colorectal carcinogenesis.

Telomerase activity has been detected in germ cells as well as in the developing embryo. Activity is no longer detectable in most somatic cells of the neonate, although low levels of activity persist in regenerative tissues. Telomerase has been found to be reactivated or up-regulated in the majority of cancers. The colorectal adenoma-carcinoma sequence is one of the best-characterized models of multistep tumourigenesis and is thus suitable for determining at which stage telomerase is activated. Telomerase activity was examined by telomeric repeat amplification protocol (TRAP) assay in 96 cases of colorectal tissues, including 50 carcinomas, 31 adenomas, and 15 normal colonic tissues. For each case, histological diagnosis and telomerase activity were determined on consecutive frozen sections. In order to reduce the chance of a false-negative TRAP assay due to RNA degradation, the integrity of rRNA in the tissues was verified in each case. Twenty-five carcinomas, 30 adenomas, and all of the 15 normal colorectal mucosal samples showed no or only partial rRNA degradation and only in these cases was the TRAP assay interpreted. None of the normal tissues exhibited telomerase activity. In contrast, all of the 25 cancers and 47 per cent (14/30) of the adenomas were positive. In adenomas, telomerase activation was highly significantly related to the grade of dysplasia (p< 0.0001). All adenomas which contained high-grade dysplasia revealed telomerase activity, whereas telomerase activity was detectable in only 20 per cent (4/20) of cases with exclusively low-grade dysplasia. These results indicate that telomerase activation, which may be an obligatory step in colorectal carcinogenesis, occurs in the progression from low-grade to high-grade dysplasia in adenomas. Furthermore, in the adenoma-carcinoma sequence, telomerase activation seems to occur later than K- ras mutation but earlier than p53 mutation.

Possible worlds : the idea of happiness in the utopian vision of Louis-Sébastien Mercier

Doctoral dissertation, University of Turku

Evaluation of Limestone Filler in Gravel Mixtures "Asphaltic Concrete", R-228, 1968

This study was designed to provide background information on asphaltic concrete mixtures peculiar to northwest Iowa. This background is necessary to provide the basis for future specifications. There were several projects let in 1967 involving l", 3/4" and 3/8" mixes of Type "B'' asphaltic concrete which specified in part, II Not less than 40% of the material passing the No. 200 sieve shall be pulverized limestone or mineral filler, but in no case shall the per cent of pulverized limestone or mineral filler passing the No. 200 sieve be less than 2%. No credit will be allowed for limestone in gravel - II Northwest Iowa has no suitable limestone or mineral filler locally available. As a result, this material has to be imported, raising the cost of the mix approximately twenty-five cents per ton. The purpose of this study, therefore, was designed to compare some original job mix samples with alternate mixes from the same local material, but without the addition of pulverized limestone or mineral filler. Since the filler from the crushed gravel does not have the same crushing characteristics or sieve analysis as the pulverized limestone or mineral filler, they could not be compared on an equal percentage basis. Therefore, the alternate mixes were made to conform to the following proposed specification, "No less than 40% of the material passing No. 200 sieve shall be pulverized limestone or mineral filler or a 100% crushed gravel, but in no case shall the per cent of pulverized limestone or mineral filler or a 100% crushed gravel passing the No. 200 sieve be less than 2%."

Dimensió educativa de l'aprenentatge del discurs oral en una llengua segona o en una llengua estrangera

En un segle hem passat de considerar l'ensenyament de llengues estrangeres com una activitat marginal sense cap dimensió educativa reconeguda a considerar-lo com una activitat que cada vegada té un paper més notable en els programes deis estudiants de secundaria i que reclama més atenció en els estudis superiors. Avui dia, no és pensable una formació superior sense una comprensió ben desenvolupada de l'anglés com a llengua vehicular d'informació deis camps de coneixement més variats. Algunes formacions de caracter superior requereixen a més a més altres habilitats lingüístiques com ara parlar i escriure. La situació dominant de l'anglés, pero, no ens ha de fer oblidar que també són necessaries altres llengues si els professionals s'han de moure en un mercat de treball únic en una Europa extremadament plurilingue: i així es veura que per exemple és probablement inadequat de formar graduats i llicenciats amb perfils que els faci integrables en els sectors comercials de la indústria o les finances sense dotar-los d'uns coneixements satisfactoris de dues llengues estrangeres (a la Universitat de Barcelona, els estudiants que podrien integrar aquest grup representen actualment més d'un 20 per cent del total de l'alumnat).

Els remences de l'Almoina del Pa de la Seu de Girona (Segles XIV i XV)

Aquest article és un resum de la tesi doctoral titulada Els remences de l'Almoina del Pa de la Seu de Girona (segles XIV i XV), on s'ha analitzat el funcionament real de la servitud catalana medieval. Així doncs, el seu objectiu ha estat estudiar tots els mals usos i tots els homenatges servils aplicats i rebuts per una sola senyoria, els remences de la qual van participar activament en les dues guerres que van emprendre contra els seus senyors a final del segle XV. La senyoria escollida, l'Almoina del Pa de la Seu de Girona, és, sense cap mena de dubte, representativa del que succeïa en la diòcesi gironina. El fet que s'hagin conservat la majoria dels llibres de comptes dels seus pabordes ha permès estudiar el funcionament real i l'evolució dels pagaments derivats de la servitud en una sola senyoria i durant més de cent anys.

Testimonios arqueológicos del Oriente Próximo reflejados en el Séfer-Masa'ot de Benjamín de Tudela (Siria-Palestina, Mesopotamia y Egipto)

Benjamín de Tudela (en hebreo Biniamín ben rabbí Yonah mi- Tudela) es, sin duda, un navarro universal. Judío de la aljama tudelana, se ignora la fecha de su nacimiento (acaso hacia 1130). Hijo de rabino y viajero infatigable, sólo sabemos de este personaje lo poco que de él se menciona en su famoso Libro de Viajes o Séfer-masa`ot, fruto de sus vivas experiencias -las más de las veces directas- exquisitamente plasmadas en su relación de viaje, redactadas en hebreo. Conocedor del romance navarro vernáculo de la época, sabía hebreo - su lengua de instrucción y cultivo literario- y árabe, entendiendo acaso el griego y el latín.

Decreased thermogenic response to an oral glucose load in older subjects.

The thermogenic response to a 100 g oral glucose load was studied by indirect calorimetry in 13 older persons (age range, 38-68 years) and compared with that of 16 young matched controls of similar body weight (age range, 19-30 years). The glucose-induced thermogenesis measured over 180 min and expressed as a per cent of the energy content of the glucose load was found to be reduced in the older subjects, i.e., 5.8 +/- 0.3 per cent vs 8.6 +/- 0.7 per cent, P less than 0.002). This was also accompanied by a significant decrease in the glucose oxidation rate when averaged over the same three-hour period following the glucose load, i.e., 153 mg/min vs 213 mg/min in the control subjects (P less than 0.001) despite a similar time course of glycemia. This study suggests that the thermogenic response to an oral glucose load is blunted in older people, and this may represent an additional factor that contributes to the decreased energy requirement with age and therefore to the increased propensity to obesity if energy intake is not adjusted.

Asbestos Fibers in Type B Asphaltic Concrete Surface Course, MLR-67-1, 1968

The Standard Specifications for this project included requirements for placing two 500 foot test sections of Type B asphaltic concrete with 1-1/2 per cent asbestos fibres (mix size 3/8 inch, lift thickness 3/4 inch) as part of the regular construction of the surface course. These requirements were designed to provide asbestos modified mixtures for laboratory analysis and road performance evaluation. This report provides the preliminary results and analysis of test data obtained from tests on the mixtures placed on the roadway. Previous research by G. S. Zuelke (1) and J. H. Kestzman et al (2) indicated that asphaltic concrete mixtures modified with asbestos fibres improved stability, decreased permeability, and allowed the use of higher bitumen contents. This study indicated that the addition of asbestos fibres would permit the use of higher bitumen contents, theoretically improving durability, without adverse results. An indication was also obtained to the effect that asbestos mixtures were more difficult to compact in the field.