In controlled environment studies of cotton plants (
Gossypium barbadense
L.) a light-induced acceleration of transpiration upset the water balance established in the dark because of a lag in water ...absorption. A plant-water deficit could be generated either by sudden illumination at a given saturation deficit (sd) of the air, or by raising the sd in conjunction with illumination, without different effects.
Direct water balance measurements were confirmed in every experiment by beta ray gauge detection of changes in leaf-water content resulting from unequal gain and loss of water by the whole plant.
Recovery from the initial loss of turgidity always was faster and more complete at the higher than at the lower values of sd. Recovery occurred even in the light at the higher values of sd, but was enhanced by return to darkness and a lower sd, which at times resulted in superhydration.
Rehydration in the light could be attributed to at least 2 processes: A) a diminished transpiration rate if earlier water loss was sufficient to induce stomatal closure, and B) an increased rate of water absorption. The data suggest that a water deficit, temporary or persisting, does not cause a significantly lowered transpiration rate; thus, recovery must depend on increased absorption. The communicative link between the 2 processes appears weak, transmitting strong signals only.
This report compares the results obtained after treatment of reflex sympathetic dystrophies (algodystrophies) of the hand by pharmacological segmental blocks with buflomedil (51 cases) versus ...guanethidine (30 cases). The results were similar for all the different stages of algodystrophies treated: 65% satisfactory to excellent results with buflomedil, versus 63% with guanethidine. The sooner the algodystrophy is treated after its onset, the better the results. On TPBS, when the technique is effective, both hemovelocity and blood pool return to normal, along with the improvement in the patient's condition. Early and delayed bone fixations evolve independently of the treatment. These techniques should always be associated with active, mild physiotherapy, and in some cases with dynamic splints in order to prevent the development of functional sequelae in the form or capsulo-aponeurotic retraction.
A multidisciplinary approach for the management of reflex sympathetic dystrophy at SOS Main of Strasbourg has been progressively adopted due to the severe functional sequelae of this disease. The ...TC99 bone scan in three phases has allowed us after a one week duration of the symptoms to make an early diagnosis and to start dynamic splinting in flexion. Our study compares two groups of patients, one with an early treatment and the other with delayed treatment. It shows a correlation between the stiffness of the affected hand and the isotopic findings. The benefit from an early dynamic splinting in flexion as evidenced by a clinical improvement is corroborated by the bone scan.
