The Josephson Effect in Single Spin Superconductors

The Josephson Effect provides a primary signature of single spin superconductivity (SSS), the as yet unobserved superconducting state which was proposed recently as a low temperature phase of half-metallic antiferromagnets. These materials are insulating in the spin-down channel but are metallic in the spin-up channel. The SSS state is characterized by a unique form of p-wave pairing within a single spin channel. We develop the theory of a rich variety of Josephson effects that arise due to the form of the SSS order parameter. Tunneling is allowed at a SSS-SSS' junction but of course depends on the relative orientation of their order parameters. No current flows between an SSS and an s-wave BCS system due to their orthogonal symmetries, which potentially can be used to distinguish SSS from other superconducting states. Single spin superconductors also offer a means to probe other materials, where tunneling is a litmus test for any form of ``triplet'' order parameter.Comment: 4 pages, RevTeX, 2 PostScript figures included, to appear in J. Phys. and Chem. of Solid

Non-ST-segment elevation acute coronary syndrome in elderly patients and long-livers. Features of treatment. Literature review and case report

Despite the growing population of elderly people and long-livers every year, the treatment of acute coronary syndrome in these groups is not fully developed and is not regulated in clinical guidelines due to the lack of large randomized clinical trials. The article presents a literature review covering the following issues arising during clinical decision-making in the treatment of non-ST-segment elevation acute coronary syndrome in this group of patients: selection of invasive treatment strategy, scope of myocardial revascularization, appointment of dual antiplatelet therapy taking into account the bleeding risk, decreased renal function and senile asthenia. In addition, a case report of successful treatment of a 101-year-old female patient with non-ST-segment elevation myocardial infarction, who underwent percutaneous coronary intervention with stenting of infarct-related artery, was presented

Six-Coordinate Nitrito and Nitrato Complexes of Manganese Porphyrin

Reaction of small increments of NO2 gas with sublimed amorphous layers of Mn(II)(TPP) (TPP = meso-tetra-phenylporphyrinato dianion) in a vacuum cryostat leads to formation of the 5-coordinate monodentate nitrato complex Mn(III)(TPP)(η(1)-ONO2) (II). This transformation proceeds through the two distinct steps with initial formation of the five coordinate O-nitrito complex Mn(III)(TPP)(η(1)-ONO) (I) as demonstrated by the electronic absorption spectra and by FTIR spectra using differently labeled nitrogen dioxide. A plausible mechanism for the second stage of reaction is offered based on the spectral changes observed upon subsequent interaction of (15)NO2 and NO2 with the layered Mn(TPP). Low-temperature interaction of I and II with the vapors of various ligands L (L = O-, S-, and N-donors) leads to formation of the 6-coordinate O-nitrito Mn(III)(TPP)(L)(η(1)-ONO) and monodentate nitrato Mn(III)(TPP)(L)(η(1)-ONO2) complexes, respectively. Formation of the 6-coordinate O-nitrito complex is accompanied by the shifts of the ν(N═O) band to lower frequency and of the ν(N-O) band to higher frequency. The frequency difference between these bands Δν = ν(N═O) - ν(N-O) is a function of L and is smaller for the stronger bases. Reaction of excess NH3 with I leads to formation of Mn(TPP)(NH3)(η(1)-ONO) and of the cation [Mn(TPP)(NH3)2](+) plus ionic nitrite. The nitrito complexes are relatively unstable, but several of the nitrato species can be observed in the solid state at room temperature. For example, the tetrahydrofuran complex Mn(TPP)(THF)(η(1)-ONO2) is stable in the presence of THF vapors (∼5 mm), but it loses this ligand upon high vacuum pumping at RT. When L = dimethylsulfide (DMS), the nitrato complex is stable only to ∼-30 °C. Reactions of II with the N-donor ligands NH3, pyridine, or 1-methylimidazole are more complex. With these ligands, the nitrato complexes Mn(III)(TPP)(L)(η(1)-ONO2) and the cationic complexes [Mn(TPP)(L)2](+) coexist in the layer at room temperature, the latter formed as a result of NO3(-) displacement when L is in excess

Non-Equilibrium Phenomena in Superfluid Fermi Systems

Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

Six-Coordinate Nitrato Complexes of Iron Porphyrins with Trans S-Donor Ligands.

The reaction of dimethyl sulfide (DMS) and tetrahydrothiophene (THT) with thin, amorphous layers of the nitrato complexes Fe(Por)(η2-O2NO) (Por = meso-tetraphenylporphyrinato dianion or meso-tetra- p-tolylporphyrinato dianion) at low temperature leads to formation of the corresponding six-coordinate complexes Fe(Por)(L)(η1-ONO2) (L = DMS, THT) as characterized by Fourier transform infrared and optical spectroscopy measurements. Adduct formation was accompanied by bidentate-to-monodentate linkage isomerization of the nitrato ligand, with the FeIII center remaining in a high-spin electronic state. These adducts are thermally unstable; warming to room temperature restores the initial Fe(Por)(η2-O2NO) species

Deletion polymorphism of glutathione S-transferases genes (GSTT1, GSTM1) in patients with breast cancer in Primorye region

Background. Breast cancer (BC) refers to multifactorial polygenic diseases that occur as a result of the combined interaction of genetic and environmental factors. Glutathione-mediated detoxification is of key importance in ensuring the resistance of body cells to the damaging effect of xenobiotics.Objective: to study the prevalence of deletion polymorphisms of the GSTM1 and GSTT1 genes and to establish their influence on the formation of cancer risk in patients with BC in the Primorye region (Russia).Materials and methods. The study involved 176 women with BC, aged 23 to 79 years (mean age 48 ± 13 years) and 66 conditionally healthy individuals without cancer. The detection of deletion (null) genotypes of the GSTM1 and GSTT1 was carried out using multiplex PCR followed by analysis of the melting curves of the reaction products.Results. The frequency of GSTT1-0 genotype among BC patients was higher than in the control group (14.77 % versus 6.06 %), significantly exceeding the indicators in the control group by more than 2.5 times (p <0.1), indicating an association between the carriage of the GSTT1-0 genotype and the risk of developing BC. At the same time, the frequencies of the GSTM1-0 genotype in the study groups were comparable; no statistically significant association with the risk of developing BC was found.Conclusions. Homozygous deletion of GSTT1 (GSTT1-0) can potentially be considered as a low-penetrant risk factor for developing BC in the population of Primorye region

ВРЕМЕННАЯ СТРУКТУРА ЭЛЕКТРОЛИТНОГО И МИКРОЭЛЕМЕНТНОГО ГОМЕОСТАЗА ПРИ СТРЕССЕ И ИШЕМИЧЕСКОЙ БОЛЕЗНИ СЕРДЦА

Four-hour urine and blood specimen were collected over a span of 48-120 hours from 70 healthy subjects, 40 patients with IHD, 15 intact rabbits, 20 rabbits under the action of stress. Each specimen was analyzed for electrolytes (sodium, potassium, phosphorus, chlorine, calcium, magnesium) and trace elements (iron, copper, zinc, chromium, cadmium, vanadium). Rhythm parameters have been estimated by dispersion analysis for nonsinusoidal rhythms and by nonlinear least squares method for sinusoidal rhythms. In healthy subjects in 91% cases of 593 rhythmological investigations urinary excretion electrolytes and trace elements statistically significant rhythms were observed. In healthy subjects and in intact rabbits electrolytes and trace elements rythms were circadian in 75-92% of cases. Acrophases of rhythms were mostly individual. In early stage of IHD and in rabbits under the action of stress electrolytes and trace elements rhythms were statistically non significant in 20-43% of cases. Among significant rhythms of infradian ones (45-60%) prevail. Mesors of sodium, chlorine, phosphorus, iron, copper, zinc, chromium and vanadium excretion rhythms were statically significantly higher than in healthy subjects. Mesors of calcium and magnesium were statically significantly lower than in healthy subjects. Amplitudes of chlorine, phosphorus, iron, copper, zinc were statistically significantly higher than in healthy subjects. Amplitudes of sodium/potassium, magnesium statistically significantly lower than in healthy subjects.Проведено клинико-экспериментальное исследование временной структуры электролитного и микроэлементного гомеостаза при стрессе и ишемической болезни сердца (ИБС). Обследованы 70 здоровых лиц, 40 больных ИБС. Исследование проводилось во все времена года при сохранении одинаковых условий сна и бодрствования, приёма пищи, поваренной соли и жидкости. Забор мочи осуществлялся в течение 72-120 ч с 4-часовыми интервалами. Определение 14 показателей (объём мочи, натрий, калий, коэффициент натрий/калий, хлор, кальций, магний, фосфор, железо, медь, цинк, хром, кадмий и ванадий) проводилось в 18-30 порциях мочи для каждого обследуемого. Экспериментальная работа выполнена на кроликах-самцах породы шиншилла. Первая серия проведена на интактных животных. Во второй серии воспроизводили стресс. У всех животных в течение двух суток с 4-часовыми интервалами забирали кровь, а также 4-часовые порции мочи. Для оценки параметров ритмов использованы нелинейный метод наименьших квадратов и метод оценки повторяемости фрагментов исследуемой кривой, основанный на дисперсионном анализе. Показано, что при ИБС и длительном стрессе в эксперименте показатели циркадианной организации водно-минерального гомеостаза трансформируются в непериодические колебания или формируется в основном инфрадианная ритмичность, изменяются величины некоторых мезоров и амплитуд