Microcystbiopterins A-E, five O-methylated biopterin glycosides from two Microcystis spp. bloom biomasses.

Five previously undescribed biopterin glycosides, microcystbiopterin A-E, were isolated from the extracts of two bloom materials of Microcystis spp. collected from a fishpond (IL-337) and Lake Kinneret (IL-347), Israel. The structure of the pterins was established by interpretation of their UV, CD, 1D and 2D NMR spectra and HR mass measurements.

Optical pump-probe detection of manganese hyperfine beats in (Cd,Mn)Te crystals.

Optical pump-probe experiments reveal spin beats of manganese ions in (Cd,Mn)Te, due to hyperfine and crystal fields. At "magic" orientations of the magnetic field, the effect of local crystal field is strongly suppressed. In this case, the spin precession of Mn(2+) embedded in the lattice approaches the precession expected for the free ion.

Metabolites of Microcystis aeruginosa bloom material from Lake Kinneret, Israel.

Six new metabolites, micropeptin KT1042, microguanidine KT636, aeruginosins KT608A, KT608B, and KT650, and pseudoaeruginosin KT554, were isolated along with the known micropeptins SF909 and HM978, cyanopeptolin S, anabaenopeptin F, and the two isomers of planktocyclin-S-oxide from a bloom material collected from Lake Kinneret, Israel, in March 2005. The structure elucidation and biological activity of the six new natural products isolated from this bloom material and the related aeruginosin GH553 are described.

Swapping spin currents: interchanging spin and flow directions.

We introduce a previously unknown spin-related transport phenomenon, consisting of a transformation (swapping) of spin currents, in which the spin direction and the direction of flow are interchanged. Swapping is due to the spin-orbit interaction in scattering. It originates from the correlation between the spin rotation and the scattering angle.

[Neuromidin in the treatment of vascular cognitive disorders].

Neuromidin (ipidacrin) was administered to 41 patients, aged 51-79 years, with mild cognitive impairment (MSI) (19) and vascular dementia (22). The drug was prescribed in increasing dosages from 10 to 40 mg during 6 months (a dosage of 40 mg was administered from the 4th week of the treatment). Cognitive functioning was assessed using some clinical scales (CGI, MMSE, GDS etc) and common neuropsychological tests at the base-line and on the 3rd and 6th month of the treatment.

Visual positioning of previously defined ROIs on microscopic slides.

In microscopy, regions of interest are usually much smaller than the whole slide area. Various microscopy related medical applications, such as telepathology and computer aided diagnosis, are liable to benefit greatly from microscope auto positioning on previously defined regions of interest. In this paper, we present a method for image-based auto positioning on a microscope slide.

Fatal paraphenylenediamine (hair dye) intoxication in a child resembling Ludwig's angina.

A 6 year-old child with paraphenylenediamine intoxication is presented. The patient suffered from sore throat, cough, and anorexia, followed by severe dyspnea caused by edema of the tongue, pharynx, and neck, renal failure, and metabolic acidosis. A presumptive diagnosis of Ludwig's angina, a severe anaerobic infection of the sublingual neck space, was entertained.

[Limp as a presenting symptom of psoas muscle inflammation].

Inflammatory irritation of the psoas muscle in children is rare. The initial diagnosis may be difficult because of the similarity between the symptoms of psoas muscle inflammation and septic hip joint. We present a boy and a girl, both 3.

[Pneumococcal serotypes in children with acute and chronic inflammatory diseases of the lungs and in healthy children].

The serotyping of 350 Streptococcus pneumoniae strains isolated from patients with acute and chronic diseases of the respiratory organs and from healthy children was carried out with the use of the agglutination test. 145 pleural fluid samples were tested for the presence of the pneumococcal antigen and its K-type. The prevailing pneumococcal serotypes were 6, 1, 19, 12 and 9 in acute pneumonia and 6, 19, 42, 3 and 12 in chronic pneumonia, including, respectively, 64.

[Type-specific pneumococcal agglutinating sera in precipitation tests].

Diagnostic agglutinating sera to pneumococci of different serotypes have been studied with respect to their capacity for taking part in the reactions of precipitation with capsular pneumococcal polysaccharides. The sera have proved to be highly active and specific in the reactions of double immunodiffusion and immunoelectrophoresis. The sera under study have also been found to react with cattle serum, one of the components of the medium used for the cultivation of pneumococci.

[Serological passage of bacteria of the genus Providencia isolated from patients with wound, urological and intestinal infections].

A total of 395 Providencia strains isolated from patients and the environment were studied. Their differentiation by O and H antigens revealed that these strains belonged to 36 serological groups and contained 26 varieties of the flagellar antigen. In accordance with the combinations of O and H antigens, 59 serological variants were found among the Providencia strains.

[Diagnostic pneumococcal sera and the serological typing of Streptococcus pneumoniae].

The technology of the preparation of 20 diagnostic pneumococcal antisera premitting the differentiation of S. pneumoniae by K-antigen in the slide agglutination test and the capsule swelling test has been developed. The data on S.

[The shape of proton magnetic resonance band of lipid bilayers].

An approximation of isolated spin pairs is used to obtain the equation for PMR line shape of lipid bilayers. The internuclear vector order parameter dependence on the position of the proton pair of lipid molecule is taken into account. Good agreement with experimental curves leads to the conclusion that the main reason for the unusual PMR line shape of lipid bilayers is decrease of order parameters on approaching hydrophobic tails of lipid molecules of bilayer.

[Biochemical characteristics of pneumococcal reference strains].

The results of the study of the enzymatic properties of pneumococcal collection strains belonging to 83 K-types, their sensitivity to optochine and their facility of lysis under the action of bile indicate that the strains in the collection belong to the species Str. pneumoniae, which makes this collection suitable for obtaining diagnostic preparations, as well as for other microbiological, immunological and genetic studies.

[Antigenic relations between enteropathogenic Escherichia O151:K, Citrobacter and Hafnia].

The strains isolated from acute dysentery patients and convalescents and identified as E. coli O151:K--were studied. Diagnostic errors due to inexact genus determination were revealed, and the isolated strains were found to belong to Citrobacter and Hafnia.

[Use of the aliphatic amine reaction with 2,5-dinitrophenol in antibiotic analysis].

Possible use of dinitrophenol reaction with amines in quantitative determination of amines and amino sugars in various antibiotics was investigated. It was found that the reaction with 2,5-dinitrophenol (2,5-DNP) in dimethylsulfoxide (DMSO) providing the highest batochromic shift in the electron spectra was most suitable. Selectivity of the 2,5-DNP reaction with respect to mycosamine contained in polyenic antibiotics was shown.

[Flagellar antigens of E. coli serologically interrlelated to H40, 41 and H41, 42, 43 flagellar antigens of Citrobacter. New H-antigeny E. coli i Citrobacter].

The authors confirmed the reference of the test strains H13 (P6c) and H22 (A231a) of the international collection of E. coli to Citrobacter; their antigenic formula was established. As shown, strains P6c possessed a variety of the H-antigen which was not described in Citrobacter earlier, designated as H41a, 97.

[Etiologic role of bacteria of the genus Providencia in acute intestinal diseases].

A study was made of morphological, cultural, biochemical properties and antigenic structure (by O-antigen) of 59 strains isolated in group acute intestinal affection of children at the pioneer camp. By the combination of biochemical properties (31 tests) all the cultures isolated were referred to Providencia alcalifaciens of biotype 7. Serological typing with the aid of experimental diagnostic agglutinating O-sera showed these strains to be referred to serological group O2.