Electrically controlled polarized photoluminescence of CdSe/ZnS nanorods embedded in a liquid crystal template.

A novel homogeneous composite material, consisting of luminescent CdSe/ZnS quantum nanorods, embedded in the nematic liquid crystal 5CB, has been prepared. Liquid crystal cells and free-standing stretched polymer films incorporating this composite material were characterized using polarized micro-photoluminescence and electro-optical measurements under an applied electric field. A liquid crystal induced, macroscopic orientation of the nanorods in a thin layer of the material has been demonstrated. A conventional liquid crystal cell, filled with this composite, exhibits 40% modulation of the nanorod's photoluminescence intensity when subjected to an external electric field. These results indicate that quantum nanorods may have practical applications in photonic devices.

[Color contact thermography in the diagnosis of breast diseases]. / Tsetnaia kontaktnaia termografiia v diagnostike zabolevanii molochno2 zhelezy.

One hundred of women with diseases of the mammary gland were examined. Breast cancer was found in 31 patients, 65 patients had various benign tumors, 4 women had chronic mastitis. Breast cancer was manifested by pronounced focal elevation of temperature over the tumor, temperature asymmetry of mammary glands, uneven boundaries of hyperthermia focus with "pathways" of hyperthermia running from the tumor to regional lymph nodes (in 75% of cases) even when no metastases are found histologically. Patients with alterations in the mammary glands referred to as precancerous, are thermographically characterized by focal hyperthermia with distinct boundaries. Nonproliferating forms of fibroadenoma, as a rule, do not manifest themselves by focal pictures without changes in the general background of the thermogram.

[Use of color thermography for diagnosis of thyroid diseases]primenie tsvetnoi termografii dlia diagnostiki zabolveanii shchitovidnoi zhelezy. / Primenenie tsvetnoi termografii dlia diagnostiki zabolevanii shchitovidnoi zhelezy

121 patients with different affections of the thyroid were examined by the method of color thermography. In patients with signs of hyperthyroidism or inflammation of the thyroid a local skin hyperthermia of the anterior jugular surface was observed. In the presence of euthyroid or hypothyroid struma skin temperature changes are either entirely absent, or there is a moderately pronounced local hypothermia. Cancer of the thyroid, as a rule, causes a more pronounced local skin hypothermia on the anterior jugular aspect.