Uptake of Zn as Influenced by B-vitamins, Hydrogen Ion Concentration and EDTA in Cyamopsis tetragonolobTaub and Brassica nigra

Vitamins of the B-group viz., thiamine, riboflavin, pantothenicacid, pyridoxine and folic acid significantly increased theuptake of zinc by clusterbean and mustard plants. Vitamin inducedabsorptive capacity for zinc was greater in clusterbean thanin mustard. Uptake of Zn was maximum in leaves of pyridoxinetreated clusterbean and thiamine treated mustard plants. Zincuptake was found to be maximum at pH 9.0 and minimum at pH 6.0in both these two plants. The chelating agent (EDTA) was moreeffective in increasing Zn uptake in mustard than in clusterbean.A possible interaction between EDTA and vitamins is envisaged. Clusterbean, mustard, Zn uptake, B-vitamins, pH, EDTA     

The Treatment of Pathological Tendencies and Obsessional Conditions by Diversion Psychotherapeutic Methods

As is known, today's psychotherapy may be divided into two categories: lower-order psychotherapy, in the form of hypnosis or suggestion in the waking state, and higher-order psychotherapy, in the form of treatment by Déjérine's exercise,¹ rational therapy or Dubois's persuasion therapy,² Freud's psychoanalysis,³ and treatment by Martsinovsky's methods.⁴     

The Influence of Hydrogen Ion Concentration on Calcium Binding and Release by Skeletal Muscle Sarcoplasmic Reticulum

Calcium release and binding produced by alterations in pH were investigated in isolated sarcoplasmic reticulum (SR) from skeletal muscle. When the pH was abruptly increased from 6.46 to 7.82, after calcium loading for 30 sec, 80–90 nanomoles (nmole) of calcium/mg protein were released. When the pH was abruptly decreased from 7.56 to 6.46, after calcium loading for 30 sec, 25–30 nmole of calcium/mg protein were rebound. The calcium release process was shown to be a function of pH change: 57 nmole of calcium were released per 1 pH unit change per mg protein. The amount of adenosine triphosphate (ATP) bound to the SR was not altered by the pH changes. The release phenomenon was not due to alteration of ATP concentration by the increased pH. Native actomyosin was combined with SR in order to study the effectiveness of calcium release from the SR by pH change in inducing super-precipitation of actomyosin. It was found that SR, in an amount high enough to inhibit superprecipitation at pH 6.5, did not prevent the process when the pH was suddenly increased to 7.3, indicating that the affinity of SR for calcium depends specifically on pH. These data suggest the possible participation of hydrogen ion concentration in excitation-contraction coupling.     

水体中病毒浓缩方法及其条件优化

本研究探讨了在自来水和污水两种不同的水体环境中, 三氯化铝沉淀法和正电荷滤膜法浓缩回收病毒的效率, 并比较应用不同的浓缩条件、洗脱物质时的病毒回收率, 从而建立有效的环境样本中病毒的浓缩方法。结果表明, 三氯化铝沉淀法在两种水体中的回收率均较高, 最高回收率分别达到96.0%和92.0%, 但正电荷滤膜法在两种水体中的回收率差别较大。在自来水中, 正电荷滤膜法的最高回收率为93.9%, 在污水中的最高回收率仅为69.9%, 这说明正电荷滤膜法适用于病毒含量较高且悬浮物等杂质较少的样本。在应用于自来水样时, 两种方法均可起到有效的病毒浓缩作用, 但在悬浮物等杂质较多的污水中, 三氯化铝法具有较好的回收效率。     

Quadrupole Relaxation of the 7Li+ Ion in Dilute Aqueous Solution Determined by Experimental and Theoretical Methods

A combination of molecular dynamics simulations (MD), ab initio selfconsistent field (SCF) calculations and nuclear magnetic resonance relaxation time experiments (NMR) is a powerful battery of techniques to investigate the molecular origins of the nuclear quadrupole relaxation mechanism for ⁷Li⁺ ions in dilute aqueous solution.