At ejaculation, human sperm are considered to be mechanically trapped and become immotile in the semen coagulum by binding to semenogelins (Sgs) from the seminal vesicle and zinc ions from the prostate. However, the physiological combined roles of the protein and heavy metal on sperm motility are unknown. Here, we have first demonstrated that Sg I alone, which does not form the semen coagulum w...

Electronic control over the generation, transport, and delivery of ions is useful in order to regulate reactions, functions, and processes in various chemical and biological systems. Different kinds of ion diodes and transistors that exhibit non-linear current versus voltage characteristics have been explored to generate chemical gradients and signals. Bipolar membranes (BMs) exhibit both ion c...

A study of the accumulation metal ions in sludge bioenergy complex after burning plant's raw materials was carried out. The value content toxic metals (cadmium, lead, and mercury) is less than an order magnitude MPC for soils. presence a trace elements, iron, calcium, magnesium, sodium makes them attractive use as production organic-mineral fertilizers cultivation sufficiently wide range agricu...

The appearance of epileptiform discharges in electrocorticograms was induced by a unilateral injection of CoCl2 solution into the sensorimotor cortex of rats. Accumulation of cyclic AMP elicited by ouabain or a high concentration of potassium ions was determined in slices from different cortical areas of rats 9 or 10 days after the injection. In the anterior cortex, the depolarization-elicited ...

N a + C a 2 + exchange has been well defined in the membranes of excitable tissues. Its main role is suggested to be the extrusion of calcium from the cells at the expense of t ransmembrane electrochemical sodium gradient. T h e system has been studied in detail m vitro in membrane vesicles loaded with sodium ions and transferred into media containing ions other t h a n sodium (e.g. Philipson 1...

Effect of manganese with three different valence states on carthamin formation was studied by using freshly collected flowers from dyer’s saffron ( C. tinctorius) capitula. At 1 10 hm con­ centration, these cations accelerated markedly the carthamin formation induced by endoge­ nous enzyme(s) in the detached floral tissues. The acceleration was obviously dependent on the valence state of the te...

Data-dependent external m/z selection and accumulation of ions is demonstrated in use with ESI-FTICR instrumentation, with two different methods for ion selection being explored. One method uses RF/DC quadrupole filtering and is described in use with an 11.5 tesla (T) FTICR instrument, while the second method employs RF-only resonance dipolar excitation selection and is described in use with a ...

When rat lens is incubated in 30 mM galactose overnight, the extent of accumulation of rubidium ions (Rb) and myoinositol (MI) are affected, as well as the Na-K ATPase activity. Rb accumulation and Na-K ATPase activity are only slightly affected compared to the dramatic drop in MI accumulation. These changes are completely abolished by sorbinil, which blocks polyol formation, or by rendering th...