Lipoprotein lipase activity in normal human adipose tissue and its absence in human lipomas

Résumé Il a été trouvé que des spécimens de tissus souscutanés humains et des tissus adipeux omentaux hydrolyseraient un substrat triglycéride activé avec du plasma humain quand incubés dans un medium contenant de l'albumine bovine et du sulfate d'ammonium. Les spécimens de lipomes humains n'ont pas montré d'activité lipolytique signifiante. Les homogénates de lipomes n'ont pas diminué l'activité lipolytique des spécimens de tissus adipeux humains.     

A unique colour and polarization vision system in mantis shrimps

The apposition compound eyes of mantis shrimps (stomatopods) are divided into three sections, the dorsal and ventral hemispheres and the midband. Many ommatidia of both hemispheres, and all those in the midband, sample the same narrow band in space. The function of the morphologically distinct midband region is not clear, but new evidence suggests that it may be adapted in a unique manner for colour and polarization vision. A series of carotenoid colour filters screen the photopigment and potentially provide a tetrachromatic input for contrast-enhanced vision or true colour vision. The filters are blocks of coloured droplets (red, orange, yellow, purple, pink or blue) within the rhabdoms of two rows of midband ommatidia. The arrangement of tiered microvilli in two other midband rows suggests that they provide a unique form of polarization vision.     

The long shadow of childhood: associations between parental social class and own social class, educational attainment and timing of first birth; results from the ONS Longitudinal Study

In September 2004, linked data from the 2001 Census was made available in the Office for National Statistics (ONS) Longitudinal Study (a 1 per cent sample of the population of England and Wales). The study now includes information from four censuses on sample members and the people they lived with. The availability of this new information, the length of follow-up and other features of the study (such as records of births and deaths to sample members) provide new opportunities for analysing change--both over the life course, between time periods, and between generations. This article illustrates the potential for analysis of continuity and change with new results on intergenerational social mobility, and on parental social class and age at first birth.     

Clindamycin and lincomycin alter miniature endplate current decay.

Antibiotic-induced muscle paralysis has frequently been found in both experimental animals and man with three distinct classes of antibiotic: (1) streptomycin and related aminoglycoside compounds, (2) polymyxins and (3) tetracyclines. Recently lincomycin and its chemical congener, clindamycin, have been reported to produce muscle paralysis which has different characteristics from those seen with other classes of antibiotic. Although closely related in chemical structure, lincomycin and clindamycin also seem to produce muscle paralysis by different mechanisms. Clindamycin is considered to exert a direct depressant action on muscle contractility whereas the action of lincomycin is considered to be primarily a depression of neuromuscular transmission. We report here that each of these antibiotics had a significant but different influence on endplate channel behaviour. Clindamycin increased the rate of miniature endplate current (m.e.p.c.) decay and reduced its voltage sensitivity without altering its exponential nature. Lincomycin split m.e.p.c. decay into an initial rapid phase followed by a prolonged phase.     

On phosphorylation in brain tissue in the chick

Zusammenfassung Der Austausch von P³² zwischen anorganischem Phosphat und ATP war grösser in der Leber als im Gehirn des Hühnchens. Dieser Unterschied in den zwei Geweben ist jedoch nach dem Ausbrüten des Embryos grösser.