Optical Writing of Magnetic Properties by Remanent Photostriction.

We present an optically induced remanent photostriction in BiFeO_{3}, resulting from the photovoltaic effect, which is used to modify the ferromagnetism of Ni film in a hybrid BiFeO_{3}/Ni structure. The 75% change in coercivity in the Ni film is achieved via optical and nonvolatile control. This photoferromagnetic effect can be reversed by static or ac electric depolarization of BiFeO_{3}. Hence, the strain dependent changes in magnetic properties are written optically, and erased electrically. Light-mediated straintronics is therefore a possible approach for low-power multistate control of magnetic elements relevant for memory and spintronic applications.

Multistate nonvolatile straintronics controlled by a lateral electric field.

We present a multifunctional and multistate permanent memory device based on lateral electric field control of a strained surface. Sub-coercive electrical writing of a remnant strain of a PZT substrate imprints stable and rewritable resistance changes on a CoFe overlayer. A proof-of-principle device, with the simplest resistance strain gage design, is shown as a memory cell exhibiting 17-memory states of high reproducibility and reliability for nonvolatile operations. Magnetoresistance of the film also depends on the cell state, and indicates a rewritable change of magnetic properties persisting in the remnant strain of the substrate. This makes it possible to combine strain, magnetic and resistive functionalities in a single memory element, and suggests that sub-coercive stress studies are of interest for straintronics applications.

[Osteoangiography in early diagnosis of acute hematogenic osteomyelitis of the long tubular bones in children]. / Metod osteoangiografii v rannei diagnostike ostrogo osteomielita dlinnykh trubchatykh kostei v detskom vozraste.

33% cardiotrast of 70% verographin were used for the vessels contrasting. Osteoangiography was carried out in 61 cases suspected for acute hematogenic osteomyelitis (AHO). The age of patients ranged from 2 to 5 years. The diagnosis was proved in 53 cases. In 8 children osteoangiography permitted to cancel the diagnosis of AHO, which was proved later by subsequent clinical observations.

[Sensitivity to antibacterial preparations of the pathogenic staphylococci isolated from carriers]. / Chuvstvitel'nost' k antibakterial'nym preparatam patogennykh stafilokokkov, vydeliaemykh u nositelei

After discontinuation of the use of antibiotics for sanation of the carriers of pathogenic staphylococci among the staff of a maternity unit, the number of the strains resistant to penicillin, streptomycin, chlortetracycline, tetracycline, levomycetin, erythromycin, monomycin and neomycin decreased 1.3, 2.9, 10,4.3,5.5,1.5,3.9 and 2.4 times respectively. The differences were statistically reliable. The causes of the antibiotic resistance decrease require further investigation.