Relationship between the timing of vessel formation and leaf phenology in ten ring-porous and diffuse-porous deciduous tree species

The goal of this study is to clarify how different aspects of plant function are coordinated developmentally for species of ring-porous versus diffuse-porous deciduous trees, comparing the timing of leaf phenology and vessel formation in twigs and stems from an ecophysiological viewpoint. Cylindrical stem cores and twigs were collected at intervals from early spring through summer from five ring-porous and five diffuse-porous species in a cool temperate forest, and leaf and vessel formation were observed simultaneously. We found that the first-formed vessels of the year were lignified in twigs around the time of leaf appearance and at or before full leaf expansion of each tree in both groups of species with flush-leaves. Vessels in stems were lignified 2 weeks before to 4 weeks after leaf appearance and before or around full leaf expansion of the tree in ring-porous species. This was significantly earlier than in diffuse-porous species, in which stem vessel lignification was 2–8 weeks after leaf appearance and at or after full leaf expansion of the tree. The timing of vessel formation in twigs compared to stems was significantly earlier in ring-porous species than in diffuse-porous species. Lignification of vessels in stems occurred within 2 weeks of lignification in the twigs of ring-porous species and 2–8 weeks after lignification in twigs of diffuse-porous species. These results indicate the order and time-lag of leaf and vessel formation. Ring-porous species showed intensive leaf/vessel production, whereas diffuse-porous species showed less intensive leaf/vessel production

成長錐を用いた木片試料採取法の検討 : 道管形成の季節変化を調べる観点から

Feature : Impact on Ashiu forest ecosystem due to dee

[Glucose tolerance abnormalities in mice actively immunized with components of bovine pancreatic hormones (author's transl)]

The relationship between immune insulitis and glucose tolerance was investigated in three groups of mice following active immunization with different components of bovine pancreatic hormone. An abnormal blood glucose level was observed in the three groups ranging from 33.3% to 87.5% of sensitized mice. A relationship was not present between the glucose tolerance response and the presence of insulitis or anti-insulin antibody in the blood of sensitized mice. However, all sensitized mice with a marked decrease in glucose tolerance were found to have insulitis. In animals without established insulitis and with no demonstrable anti-insulin antibody, abnormal glucose tolerance was noted. This latter condition occurred more frequently with recrystallized insulin than with a-component and did not occur with monocomponent insulin. These findings seemed to indicate that two distinct processes involving some circulating antibodies with anti-insulin antibody and insulitis might be involved in the development of the observed glucose tolerance abnormality.</p

Studies on the Discharge at Water-intake Structure

This head work is the water-intake structure, by which irrigation water has been carried to the reservoir constructed in the other catchment basion. We always have intaken water from the river by this head work, even at the time of flood. To design such structure, we have to know the rerationship between the gate opening and the discharge of water or the discharge coefficient which varies widely according to the river water level. That orifice formula could be used in calculation to obtain the amount of discharged water from the gate has experimentally been confirmed by Toch, Honma and others. The discharge coefficient of the intake gate Cq is shown in its relationship to parameters expressing the gate geometry. Any agreement between actual gate discharge and Toch's experimental results could never be found when the gate geometry is different. Therefore, we can only obtain Cq value through a specific model study for a particular project. Specially in this intake mention should be made here to the fact that the loss of head Ф in the uniform flow sections upstreams and downstreams from the gate is ignored, and the value of Ф related to the Cq value. Relation between Cq and Ф can be obtained by the following equation using the Bernoulli's energay theorem, in which ψ. Ф are head loss parameters, Cq H1･H2 /√H12 (1+ψ) + H32 (Ф-l) and Cq value can be obtained by calculating head loss. On the other hand, if the systematic graphical representation of the relationship between the value q and the elements is obtained by the experimental measurements of hydraulic model tests, q-H1/h～H3/h, in which H1,H3 are the depths of flow in the upstream and downstream from the gates, should be considered applicable to the practical work and useful in checking up the experimental values with theoretical solution

Influence of an antianxiety drug on hyperemesis diabeticorum.

The patient was a 37-year-old female teacher with hyperemesis diabeticorum and juvenile Type-I diabetes. At the age of 29 years, nausea and vomiting developed and secured at nearly weekly intervals. She was started on clotiazepam (15 mg/day). The vomiting was cured and psychological improvement was evident; her anxiety about diabetes was markedly reduced. An X-ray examination after the administration of clotiazepam showed that she was entirely free from marked hypoperistalsis and the severe retention of gastric contents which had been present before this treatment. The present case is a clear example of stress closely related to the pathogenesis of hyperemesis diabeticorum.</p