Anti-corrosion ceramic coatings on the surface of Nd-Fe-B repelling magnets

The results of vacuum-arc deposition of thin ZrO₂coatings to protect the surface of Nd-Fe-B permanent magnets used as repelling devices in orthodontics are presented. The structure, phase composition and mechanical properties of zirconium dioxide films have been investigated by means of SEM, XRD, EDX, XRF and nanoindentation method. It was revealed the formation of polycrystalline ZrO₂ films of monoclinic modification with average grain size 25 nm. The influence of the ZrO₂ coating in terms of its barrier properties for corrosion in quasi-physiological 0.9 NaCl solution has been studied. Electrochemical measurements indicated good barrier properties of the coating on specimens in the physiological solution environment

Longitudinal Momentum Fraction X_L for Two High P_t Protons in pp->ppX Reaction

We present an analysis of new data from Experiment E850 at BNL. We have characterized the inclusive cross section near the endpoint for pp exclusive scattering in Hydrogen and in Carbon with incident beam energy of 6 GeV. We select events with a pair of back-to-back hadrons at large transverse momentum. These cross sections are parameterized with a form $\frac{d \sigma}{d X_{L}}$ $\sim(1-X_{L})^{p}$, where ${X_{L}}$ is the ratio of the longitudinal momentum of the observed pair to the total incident beam momentum. Small value of $p$ may suggest that the number of partons participating in the reaction is large and reaction has a strong dependence on the center-of-mass energy. We also discuss nuclear effects observed in our kinematic region.Comment: 4 pages, 2 figures, to be published in Proceedings of CIPANP2000, Quebec, May 22-28, 2000, requires aipproc.sty(included

Electroproduction, photoproduction, and inverse electroproduction of pions in the first resonance region

Methods are set forth for determining the hadron electromagnetic structure in the sub-$N\bar{N}$-threshold timelike region of the virtual-photon ``mass'' and for investigating the nucleon weak structure in the spacelike region from experimental data on the process $\pi N\to e^+e^- N$ at low energies. These methods are formulated using the unified description of photoproduction, electroproduction, and inverse electroproduction of pions in the first resonance region in the framework of the dispersion-relation model and on the basis of the model-independent properties of inverse electroproduction. Applications of these methods are also shown.Comment: The revised published version; Revtex4, 18 pages, 6 figure

A Precision Measurement of Nuclear Muon Capture on 3He

The muon capture rate in the reaction mu- 3He -> nu + 3H has been measured at PSI using a modular high pressure ionization chamber. The rate corresponding to statistical hyperfine population of the mu-3He atom is (1496.0 +- 4.0) s^-1. This result confirms the PCAC prediction for the pseudoscalar form factors of the 3He-3H system and the nucleon.Comment: 13 pages, 6 PostScript figure

Energy Dependence of Nuclear Transparency in C(p,2p) Scattering

The transparency of carbon for (p,2p) quasi-elastic events was measured at beam energies ranging from 6 to 14.5 GeV at 90 degrees c.m. The four momentum transfer squared q*q ranged from 4.8 to 16.9 (GeV/c)**2. We present the observed energy dependence of the ratio of the carbon to hydrogen cross sections. We also apply a model for the nuclear momentum distribution of carbon to normalize this transparency ratio. We find a sharp rise in transparency as the beam energy is increased to 9 GeV and a reduction to approximately the Glauber level at higher energies.Comment: 4 pages, 2figures, submitted to PR

West Nile Fever in the Russian Federation in 2022, the Incidence Forecast for 2023

The review presents an analysis of West Nile fever (WNF) epidemiological situation in the Russian Federation in 2022 and the summarized results of monitoring over the pathogen. The following features of the WNF epidemic process in Russia are outlined: the decrease (by 4 times) in the incidence rates compared to the long-term average values against an extremely extensive nature of manifestations (16 constituent entities in 6 federal districts), including the detection of local cases in 5 new territories (Tver, Tambov, Vladimir Regions, Khanty-Mansi Autonomous District, and Karachay-Cherkess Republic), predominant registration of incidence in the Central Federal District (51 %), early start and termination of the epidemic season. There is a decrease in the proportion of neuroinvasive forms in the structure of incidence, prevalence of females and the age group of “60 years and over”, as well as record rate values of people infected at the place of residence in cities, which is associated with the peculiarities of case detection, namely, screening examinations of febrile patients in hospitals by efforts of the Reference Center, according to the results of which 60 % of all registered patients with WNF in Russia were diagnosed. Monitoring studies of the Reference Center in the territory of the Central, Southern and North-Caucasian Federal Districts confirmed the intensive circulation of the pathogen. The low level of officially registered incidence is caused by insufficiently effective identification of patients. Molecular genetic studies have shown that West Nile virus lineage 2 circulated in the European part of Russia, both in epizootic and epidemic cycles. Phylogenetic analysis has revealed that 4 West Nile virus isolates found in Astrakhan, Volgograd Regions, the Republic of Kalmykia and Stavropol Territory in 2022 belong to a new genovariant of the genotype 2, first identified in Russia in 2021. Possible complication of the epidemiological situation in all federal districts of the center and south of the European part of Russia is predicted

Бронхиальная астма с явлениями гипервентиляции

Eighty hospitalized bronchial asthma (BA) patients (50 females, 30 males) were divided in two groups according to hyperventilation occurrence. The average age was 45.4±1.3 years, the mean length of the illness was 9.2±1.1 years. The first group, which was the basic, involved 22 patients with the hyperventilation signs (16 females and 6 males) with the average age 44.8±1.6 years and the BA mean length 10.4±2.3 years. The second (control) group included the remained 58 patients (34 females and 24 males with the average age 47.0±2.4 years and the BA mean length 8.7±1.2 years). The mild atopic BA with a quite good course predominated in the basic group, and the severe intrinsic BA combined with chronic bronchitis prevailed in the control group. The basic group patients mostly (15 from 22) formed the hyperventilation signs within subsyndromal somatic panic attacks which started in closed stuffy rooms, or under subjectively unpleasant smells exposure, etc., were shown as dyspnoe with insignificant shortness of breath, a sense of "incomplete inspiration" accompanied by paroxysmal choking, yawning. Typically they took short time, stopped spontaneously and imitated acute bronchial obstruction symptoms, though PEF remained normal or changed less than 15% of predictive value. The searched clinical correlations could be interpreted according to a concept of congenital sensitivity of chemoreceptors (Smoller J. W. et al., 1996). The study results confirm that hyperventilation signs are basically formed in mild BA patients within the structure of the panic attacks. These data could be useful while planning therapy for such patients.В зависимости от наличия явлений гипервентиляции 80 стационарных больных бронхиальной астмой (БА) (50 женщин, 30 мужчин; средний возраст 45,4±1,3 года, средняя продолжительность заболевания 9,2±1,1 года) разделены на 2 группы. В 1-ю (основную) включены 22 пациента (16 женщин, 6 мужчин; средний возраст 44,8±1,6 года, средняя продолжительность БА 10,4±2,3 года), обнаруживающие симптомы гипервентиляции. Во 2-ю (контрольную) — оставшиеся 58 больных (34 женщины, 24 мужчины; средний возраст 47,0±2,4 года, средняя продолжительность БА 8,7±1,2 года). Для больных основной группы характерны легкая степень заболевания (в контрольной преобладает тяжелое течение БА), отличающийся сравнительно доброкачественным течением атопический вариант БА (в контрольной чаще наблюдается инфекционно-зависимый вариант БА, сочетающийся с хроническим бронхитом). В большинстве наблюдений у больных основной группы (15 из 22) симптомы гипервентиляции формируются в структуре субсиндромальных соматизированных панических атак (манифестируют в замкнутом, душном помещении, в условиях экспозиции субъективно неприятных запахов и т.д., проявляются весьма полиморфной картиной диспноэ с незначительно повышенной частотой дыхательных движений, ощущением неполноты вдоха, чувством нехватки воздуха, сопряженном с желанием "наполнить легкие кислородом", пароксизмальными поперхиванием, зевотой; как правило, кратковременны, подвергаются обратной редукции спонтанно), имитирующих симптомы острой бронхообструкции (отмечается сохранение значения PEF в пределах нормальных величин или колебание PEF менее 15% от должных показателей). Изученные клинические соотношения могут быть интерпретированы в пределах концепций врожденной чувствительности хеморецептров (Smoller J.W. и соавт ., 1996). Результаты исследования подтверждают предположения о том, что явления гипервентиляции формируются преимущественно у больных с легким течением БА в структуре панических атак. Такие данные могут быть использованы при планировании терапевтических мероприятий у изученного контингента пациентов

Пароксетин при лечении депрессивных и тревожно-фобических состояний у больных бронхиальной астмой (пилотное исследование)

W e performed an opened, uncontrolled study of therapeutic efficacy, safety and tolerability of the psychotropic drug paroxetin (Paxil) in 25 patients with bronchial asthma (BA) and depressive (DD) or anxlity disorders (AD). The patients’ group involved 7 males and 18 females aged 34 to 61 years. All the patients received the antiasthmatic therapy according to the severity of the disease. Paroxetin was taken in the daily dose of 20 mg for 6 weeks. The patients’ status was evaluated with the HADS scale; the reduction of this parameter by 50% and more was considered as an efficacy criterion. The safety and tolerability of the drug were assessed using pneumotachometry and adverse events were evaluated with the UKU scale. The study results showed the paroxetin is well-tolerated (only 3 patients drop out from the study dure to dyspeptic syndrome) and an effective drug for DD and AFD in BA patients. The airway obstruction parameters were significantly increased under the combined treatment with paroxetin and anti-asthmatic medication.Нами проведено открытое неконтролируемое исследование терапевтической эффективности, безопасности и переносимости нового психотропного препарата пароксетина (паксила) при лечении депрессивных и тревожно-фобических расстройств (ДР и ТФР), у 25 больных бронхиальной астмой (БА) в возрасте от 34 до 61 года (7 мужчин, 18 женщин). Все больные получали ступенчатую (с учетом тяжести заболевания) противоастматическую терапию. Пароксетин назначался в течение 6 нед по 20 мг утром. До начала лечения, а также через 1, 2, 4 нед и в конце лечения регистрировалась общая оценка по шкале HADS. Критерием эффективности лечения считалось уменьшение этого показателя на 50% и более. Безопасность и переносимость препарата оценивали по данным пневмотахометрии, побочные эффекты — по шкале UKU.Результаты показали, что пароксетин эффективен при лечении Д Р и Т Ф Р у больных БА, хорошо переносится (лечение было прервано только в 3 случаях из-за диспепсических явлений). На фоне комбинированной терапии пароксетином и противоастматическими препаратами отмечался значительный прирост показателей бронхиальной проходимости