Capillary force required to detach micron-sized particles from solid surfaces--validation with bubbles circulating in water and 2 microm-diameter latex spheres.

The adhesion forces holding micron-sized particles to solid surfaces can be studied through the detachment forces developed by the transit of an air-liquid interface in a capillary. Two key variables affect the direction and magnitude of the capillary detachment force: (i) the thickness of the liquid film between the bubble and the capillary walls, and (ii) the effective angle of the triple phase contact between the particles and the interface. Variations in film thickness were calculated using a two-phase flow model.

Isolation and characterization of a psychrotolerant toxin producer, Bacillus weihenstephanensis, in liquid egg products.

A psychrotolerant bacteria of the Bacillus cereus group was found responsible for the spoilage of whole liquid egg products. By sequencing a 16S rRNA region and performing a PCR amplification of specific 16S rRNA and cspA signatures, a Bacillus weihenstephanensis was identified. Characterization of this strain shows its ability to grow in defined medium as well as in whole liquid egg at refrigerated temperatures.

[Is it possible to predict experimentally the anti-inhibitory action of some neuroleptics?].

Shortening of behavioural despair in mice, test that Porsolt and coll. have proposed for the screening of anti-depressive drugs, is able to reveal thymoanaleptic and/or desinhibitory properties of several neuroleptic-desinhibiting substances such as thioproperazine, carpipramine and sulpiride.

[Effect of isoprenaline, in mice anesthetized with pentobarbital, on the cerebral concentration of barbiturates and on the blood levels of free fatty acids].

In mice isoprenaline increases duration of pentobarbital narcosis without modification of cerebral levels. A correlation between duration of sleep and FFA seric levels increased by isoprenaline is demonstrated. This dual effect is suppressed by pindolol.

[Lithium modifications of the cataleptogenic properties of various neuroleptic drugs in the rat].

After unique ip injection (11,78 mEq/kg) LiCl increases in the Rat catalepsy produced by chlorpromazine, prochlorperazine, fluphenazine, levomepromazine, haloperidol and reserpine. This phenomenon is more important according to cataleptigenic properties of neuroleptic drugs. After repeated injections of LiCl (5 mEq/kg/d/5 dip) potentiation of catalepsy is more fugacious and not produced by levomepromazine and reserpine.