نتایج جستجو برای: root submergence
تعداد نتایج: 139891 فیلتر نتایج به سال:
Post-submergence (about 100 cm water depth for ten days) survivality and recovery of rice seedlings were studied in a greenhouse experiment. Irrespective of varieties, 10 and 15-day-old seedlings barely could recover from the shock. More than 80% of 20-day-old seedlings of variety FR13A survived. With the increase of seedling age, elongation of plants decreased during submergence. The variety F...
A soft tissue drape that is formed around the tooth, as it emerges from bone, has both aesthetic and functional significance. Post-extraction hard changes are inevitable leads to a buccal concavity. The pontics for tooth or implant supported fixed partial denture in such cases appear longer. Preservation of part root preserves periodontal apparatus hence facilitates optimal region pontic site d...
BACKGROUND AND AIMS Flooding can occur at any stage of the life cycle of a plant, but often adaptive responses of plants are only studied at a single developmental stage. It may be anticipated that juvenile plants may respond differently from mature plants, as the amount of stored resources may differ and morphological changes can be constrained. Moreover, different water depths may require dif...
Morning glory spillway is one of the spillways and used when it is not possible to use any other spillways. With the onset of submergence and flow loss, and intensification of circulation and vortexes, spillway performance decreases severely. With decreasing discharge coefficient, the height of water in the reservoir increases and the risk of dam damage, caused by the lack of spillway ability o...
The vertical pipe intake is an economical structure relative to the other alternatives. VPI usually installed near the water surface and prevents from the coarse sediment entrance to the system. The strong vortex in VPI entrance is a major problem which may reduce the system efficiency. Recognizing the vortex affected parameters, helping engineers to design anti vortex structures. In this study...
the treatment of in completely formed pulpless teeth has presented considrable problems. these teeth have wide open apexes and the walls of the root canal diverge toward the apical tissues. mechanical preparation cannot be done in the normal manner beacause of the large initial size and the taper of apical part of the canal , a mechanical stop cannot be produced at the apex of the canal and , t...
In this study, selected types of grasses were studied to determine their hydraulic roughness coefficient and select the most suitable grass for erosion control. The experiments performed in twelve trapezoidal open channels measuring 5 m x 0.12 0.03 at different flow depths (0.001m, 0.002m, 0.003m, 0.004m 0.005m) varying bed slope (0.2%, 0.3%, 0.4%). Overall, Bahama showed highest Manning’s n-va...
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