A simplified measurement of hydrated crystal densities of low melting points (low transition points) by solidifications of aqueous solutions.

A volume change method for measuring crystal densities is described. It allows the densities of unstable hydrated crystals at room temperature to be determined, by measurements of volume changes during the solidification of aqueous solutions. NaCl x 2H2O, KCl, MgSO4 x 12H2O and K2HPO4 x 6H2O were measured by the method and their densities (SE) are 1.

GDNF is a major component of trophic activity in DA-depleted striatum for survival and neurite extension of DAergic neurons.

Extracts from dopamine (DA)-depleted striatal tissue (lesion extract) and from intact striatal tissue (intact extract) were prepared, and trophic activities in these extracts were evaluated using survival and neurite extension of DAergic neurons as indices. Levels of brain-derived neurotrophic factor (BDNF), basic fibroblast growth factor (bFGF), glial cell-line derived neurotrophic factor (GDNF) and neurotrophin-3 (NT-3) in extracts were measured using enzyme-linked immunosorbent assay (ELISA). The lesion extract exhibited a stronger trophic activity on survival and neurite extension of DAergic neurons than intact extract.

[Observation of physiological change in the human ciliary body using an ultrasound biomicroscope during accommodation].

Purpose: To evaluate changes in the ciliary body during accommodation using an ultrasound biomicroscope (UBM).

Subjects And Methods: Eleven healthy persons, aged from 24 to 33 years, served as subjects. They were asked to lie in the supine position and to fixate a target placed on the ceiling 2 m above with the left eye.

Volume Changes Due to SO2-4, SeO2-4, and H2PO-4 Adsorption on Amorphous Iron(III) Hydroxide in an Aqueous Suspension.

Volume changes due to SO2-4, SeO2-4, and H2PO-4 adsorption on amorphous iron(III) hydroxide were determined by dilatometry in a mixture comprising an aqueous solution of Na2SO4, Na2SeO4, or NaH2PO4 and amorphous iron(III) hydroxide suspended in 0.1 mol dm-3 NaClO4 at an initial pH ranged from 4.50 to 6.

Dopamine metabolism in the striatum of hemiparkinsonian model rats with dopaminergic grafts.

To investigate dopamine (DA) levels as well as DA metabolism by which the striatal DAergic grafts may bring the functional recovery to hemiparkinsonian model rats, a microdialysis study was performed in the striatum, and an autoradiographic analysis for DA transporter was made. In hemiparkinsonian model rats, the concentrations of DA, dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) in striatal perfusates, decreased considerably (less than 5%, of control levels). In grafted rats that showed motor recovery, the concentration of DA recovered to almost control level, and DOPAC and HVA to about 20% of controls' suggesting that the rate of DA metabolism is low.