With an increase in growth irradiance (from 15 to 100 % of full sunlight, I15 to I100), the maximum net photosynthetic rate (Pmax), compensation (CI) and saturation irradiances of A. annua increased. At full sunlight, A. annua had a high capacity of photosynthesis, while at low irradiance it maintained a relatively high Pmax with a low CI. The height and diameter growth, total and leaf biomass, and artemisinin content of A. annua decreased with the decrease in irradiance, which might be connected with lower photosynthesis at lower than at higher irradiance. Irradiances changed biomass allocations of A. annua. The leaf/total mass ratio of A. annua increased with decreasing irradiance, but the root/total mass ratio and root/above-ground mass generally increased with increasing irradiance. Thus A. annua can grow in both weak and full sunlight. However, high yield of biomass and artemisinin require cultivation in an open habitat with adequate sunshine. and M. L. Wang ... [et al.].
Globidia, at various stages of differentiation were found in histological sections prepared from the digestive tract of an Australian gecko Heteronotia binoei Gray, 1845. the globidia — seemingly in hypertrophic endothelial host cells - were located in the lamina propria of the small intestine, and were enclosed in a parasitophorous vacuole with various stages of differentiating ineronts. When fully matured, globidia contained hundreds of merozoites within their parasitophorous vacuole.
High proper motions of various Herbig Haro Object near Cep A are reported. For a distance of 725 pc we derive tangential velocities of 200 to 250 km/s which have their common origin near the compact HII regions 2 and 3. The resulting kinematic age is 1800 ±400 years. A weak, pointlike source (I = 20.6 mag) is detected at the
position of the compact HII region 3a. No further source (I ≤ 23 mag) could be found in the region of radio continuum emission. However, an elongated feature of diffuse 1 μm emission is observed in line with the northern chain of compact radio knots. We conclude that a center of activity near the H2O-maser positions in HW2 and 3 is responsible for Cep A. It drives the molecular outflow, and also excites the compact radio continuum knots and surrounding HH-objects. The observed total luminosity and the 21 cm radio continuum data are consistent with B0.5V star or three B1V ZAMS stars.
In an extended region of recurrent groups of sunspots the relationships of spots and Hα flare occurrences were analysed on the basis of observations obtained in spring 1978. Principally new spot emergences and the relative motion of spots of opposite
magnetic polarities, belonging to unrelated bipolar spot pairs have been studied in a large activity complex lasting for several rotations. Further observational evidences were found that rapid motion of sunspots is essential to eruption of flares.
(In all speed data given the component of the differential rotation is eliminated.)