Coexistence of localized and delocalized surface plasmon modes in percolating metal films.

Near-field intensity statistics in semicontinuous silver films over a wide range of surface coverage are investigated using near-field scanning optical microscopy. The variance of intensity fluctuations and the high-order moments of intensity enhancement exhibit local minima at the percolation threshold. This reduction in local field fluctuations results from resonant excitation of delocalized surface plasmon modes. By probing the modification of the critical indices for high-order moments of intensity enhancement caused by the delocalized states, we provide the first experimental evidence for the coexistence of localized and delocalized surface plasmon modes in percolating metal films.

Magnetic plasmon propagation along a chain of connected subwavelength resonators at infrared frequencies.

A one-dimensional magnetic plasmon propagating in a linear chain of single split ring resonators is proposed. The subwavelength size resonators interact mainly through exchange of conduction current, resulting in stronger coupling as compared to the corresponding magneto-inductive interaction. Finite-difference time-domain simulations in conjunction with a developed analytical theory show that efficient energy transfer with signal attenuation of less then 0.57 dB/microm and group velocity higher than 1/4c can be achieved. The proposed novel mechanism of energy transport in the nanoscale has potential applications in subwavelength transmission lines for a wide range of integrated optical devices.

Near-field intensity correlations in semicontinuous metal-dielectric films.

Spatial intensity correlation functions are obtained from near-field scanning optical microscope measurements of semicontinuous metal-dielectric films. The concentration of metal particles on a dielectric surface is varied over a wide range to control the scattering strength. At low and high metal coverages where scattering is weak, the intensity correlation functions exhibit oscillations in the direction of incident light due to excitation of propagating surface waves. In the intermediate regime of metal concentration, the oscillatory behavior is replaced by a monotonic decay as a result of strong scattering and anomalous absorption. Significant differences in the near-field intensity correlations between metallic and dielectric random systems are demonstrated.

Synthesis of new bicyclic P-N ligands and their application in asymmetric Pd-catalyzed pi-allyl alkylation and Heck reaction.

[structure: see text] The synthesis of phosphine oxazoline ligands based on P-chiral 1-phosphanorbornadienes is reported. The use of these ligands in palladium catalyzed asymmetric allylation and Heck reaction is described.

[Immunological studies of the peripheral blood in endometriosis patients]. / Imunologichni izsledvaniia na perifernata kruv na bolni s endometrioza.

The present facts on immunity system in women with endometriosis are quite contradictory. We investigated 30 women with hystological proven diagnosis, divided into three groups: 1st group-10 women with myoma uteri, 2nd group-10 women with endometriosis, 3rd group-10 women with adnexitis chronica. Control group were 65 healthy women in reproductive age between 24-42 years. It is established, that in the 3 groups cell immunity is oppressed, but more highly expressed in women with endometriosis (Tact and Ttot. p < 0.001). There are not changes in the levels of B lymphocytes, but in the women with endometriosis they are most low. In the 3 groups NBT (Nitro Blue Tetrazolium) is with high values, i. e. there is increased dynamic activity on the neutrophils. The humoral immunity (lg G, lg A, lg M) are within the borders of standard. The results suggest the concept for disturbance of cells immunity in endometriosis.

[The anesthesiological-resuscitation and surgical problems in a female patient with an adrenal cortex carcinoma]. / Anesteziologichno-reanimatsionni i operativni problemi pri bolna s kartsinom na nadbubrechnata kora.

A patient has been observed with virilizing cancer of the adrenal cortex. Anesthesiologic-resuscitation and operative problems are discussed. The importance of corticosteroid substitutional treatment is emphasized. The operation was performed through transversal laparotomy under classical neuroleptanesthesia.

[Pharmacokinetic methods for achieving and maintaining stationary plasma levels in the venous administration of drugs]. / Farmakokinetichni metodi za dostigane i poddurzhane na statsionarni plazmeni niva pri venozno vuvezhdane na medikamentite.

Proceeding from extensive review of the available literature, the authors discuss the possibilities which pharmacokinetic modelling offers for achieving precise dosage of intravenously administered drugs. Problems associated with the development of pharmacokinetic models depending on the distributive characteristics of the drugs in the body and the desired plasma concentration are principally discussed. Concrete examples for attaining and maintaining stationary plasma concentrations of some intravenously administered drugs in anesthesiologic practice and intensive treatment are indicated.

[Immunoglobulin concentrations and their correlation with the level of antibodies in echinococcosis patients]. / Immunoglobulin-Konzentrationen und ihre Wechselbeziehungen zum Niveau der Antikörper bei Echinokokkosekranken.

A comparison of immunoglobulin concentrations between 136 patients with surgically proved echinococcosis and control persons revealed significantly higher concentrations of immunoglobulins only in the IgG class, a phenomenon, which was more pronounced in patients with secondary echinococcosis. In the first twelve months after surgical treatment the IgG and IgA values decreased faster than the IgM values, however, in the postoperative period the IgG persisted longer than the other immunoglobulins. Antibody titers and IgG concentrations observed showed a positive correlation in the follow-up time. From these results it is suggested, that the antibodies before and after surgical treatment of echinococcosis belong to the IgG class.

[Characteristics of the proteinuria in diabetic nephropathy]. / Kharakteristika na proteinuriiata pri diabetnata nefropatiia.

Considerable deviations, qualitative and quantitative, in patients with nephropathy were found with the examination 38 patients with various stages of diabetic nephropathy and 14 other diabetic patients as well as 37 healthy subjects. The urine of those patients is characterized by high content of albumin, transferrin and immunoglobulins G, A and M and to lesser degree--of alpha 2-macroglobulin. The selectivity of proteinuria is most frequently decreased, especially in the advanced stages of diabetic nephropathy. Tubular components (light chains, alpha 2- and beta-microglobulins) were also found in the urine of the same patients.