Enzymmuster im Wurzelmeristem

Summary In the meristem of growing roots a cell complex is marked by the Nadi-reaction which represents the zone of beginning differentiation.     

A new method of the reporting of phage patterns ofStaphylococcus aureus

Summary A new method of recording the phage pattern ofStaphylococcus aureus is suggested. The phage numbers are given in order of strength of the various reactions. The stability of minor reactions gives valuable information for epidemiological purposes. Working with a grant from the Gezondheidsorganisatie T.N.O.     

Neural regulation of compensatory enlargement of the parotid gland of the rat

Summary The role of the innervation in mediating compensatory enlargement of the parotid gland of the rat after partial desalivation was examined. The results of denervation experiments show that full compensatory growth requires both parasympathetic and sympathetic innervation. The presence of the parasympathetic innervation alone results in an increase in the number of cells, but not the size of the cells. The sympathetic innervation alone does not mediate either response. We, therefore, conclude that the two types of innervation have a synergistic action on the parotid to produce the maximal compensatory response, which includes an increase in both number and size of acinar cells.Supported in part by the Veterans Administration and Grant DE 02110 of the U.S. Public Health Service     

Infliximab concentration monitoring improves the control of disease activity in rheumatoid arthritis

Introduction  

Adjustment of infliximab dosage for individuals may be useful in improving therapeutic response in rheumatoid arthritis (RA). Herein, we aimed to determine whether measurement of infliximab serum concentration modifies the therapeutic decision and improves the control of disease activity.     

High apex predator biomass on remote Pacific islands

On coral reefs in Palmyra—a central Pacific atoll with limited fishing pressure—total fish biomass was 428 and 299% greater than on reefs in nearby Christmas and Fanning Islands. Large apex predators, groupers, sharks, snappers, and jacks larger than 50 cm in length, accounted for 56% of total fish biomass in Palmyra on average, but only 7 and 3% on Christmas and Fanning. These biomass proportions are remarkably similar to those previously reported for the remote and uninhabited Northwest Hawaiian Islands (NWHI) and densely populated Main Hawaiian Islands (MHI), although Palmyra’s reefs are dominated in biomass by sharks (44% of the total), whereas the NWHI by jacks (39%). Herbivorous fish biomass was also greater on Palmyra than on Christmas and Fanning (343 and 207%, respectively). These results and previous findings indicate that remote, uninhabited islands support high levels of consumers, and highlight the importance of healthy coral reef ecosystems as reference points for assessment of human impacts and establishment of restoration goals.