Dissolution dynamics of a binary switchable hydrophilicity solvent-polymer drop into an acidic aqueous phase.

Switchable hydrophilicity solvents (SHSs) are solvents defined by their ability to switch from their hydrophobic form to a hydrophilic form when brought into contact with an acidic trigger such as CO. As a consequence, SHSs qualify as promising alternatives to volatile organic compounds during industrial solvent extraction processes, as greener and inexpensive methods can be applied to separate and recover SHSs. Furthermore, because of their less volatile nature, SHSs are less flammable and so increase the safety of a larger scale extraction process.

Mapping the zonal organization of tumor perfusion and permeability in a rat glioma model by using dynamic contrast-enhanced synchrotron radiation CT.

Purpose: To depict and analyze in vivo the tumor zone organization of C6 gliomas depicted on quantitative parametric maps obtained with dynamic contrast material-enhanced synchrotron radiation computed tomography (CT) in a tightly controlled data-processing protocol.

Materials And Methods: Animal use was compliant with official French guidelines and was assessed by the local Internal Evaluation Committee for Animal Welfare and Rights. Fifteen Wistar rats with orthotopically implanted gliomas were studied at monochromatic synchrotron radiation CT after receiving a bolus injection of contrast material.

[Pituitary abscess. Study of a case and review of the literature].

The authors report one case of pituitary abscess; the diagnosis of which was particularly difficult due to its association to a multiple sclerosis that began twelve years before. A review of thirty-one pituitary abscess reported in the literature from 1970 to 1985 is made. Opto-chiasmatic compression is observed in fifty-five per cent of the cases, pituitary insufficiency in fifty-five per cent, and meningitis in sixty per cent of the cases.

[Neurosurgical treatment of reduced visual acuity from non-tumoral causes (author's transl)].

The authors describe their results after exploration of the chiasma in cases of severe reduction of visual acuity not related to general or ophthalmological affections or tumors. Stable successful results were obtained in several post-traumatic or spontaneous cases.