Conformal symmetry and light flavor baryon spectra

The degeneracy among parity pairs systematically observed in the N and Delta spectra is interpreted to hint on a possible conformal symmetry realization in the light flavor baryon sector in line with AdS_5/CFT_4. The case is made by showing that all the observed N and Delta resonances with masses below 2500 MeV distribute fairly well each over the first levels of a unitary representation of the conformal group, a representation that covers the spectrum of a quark-diquark system, placed directly on the AdS_5 cone, conformally compactified to R^1*S^3. The free geodesic motion on the S^3 manifold is described by means of the scalar conformal equation there, which is of the Klein-Gordon type. The equation is then gauged by the "curved" Coulomb potential that has the form of a cotangent function. Conformal symmetry is not exact, this because the gauge potential slightly modifies the conformal centrifugal barrier of the free geodesic motion. Thanks to this, the degeneracy between P11-S11 pairs from same level is relaxed, while the remaining states belonging to same level remain practically degenerate. The model describes the correct mass ordering in the P11-S11 pairs through the nucleon spectrum as a combined effect of the above conformal symmetry breaking, on the one side, and a parity change of the diquark from a scalar at low masses, to a pseudoscalar at higher masses, on the other. The quality of the wave functions is illustrated by calculations of realistic mean-square charge radii and electric charge form-factors on the examples of the proton, and the protonic P11(1440), and S11(1535) resonances. The scheme also allows for a prediction of the dressing function of an effective instantaneous gluon propagator from the Fourier transform of the gauge potential. We find a dressing function that is finite in the infrared and tends to zero at infinity.Comment: Latex, 5 figures, 2 tables; Paper upgraded in accord with the published version. Discussion on the meson sector include

Клинико-функциональные особенности течения саркоидоза органов дыхания в реальной практике

As a rule, heart damage in patients with sarcoidosis of respiratory organs (SOD) is not diagnosed in time, so a very important and urgent task is to identify common heart rhythm and conduction disorders.The aim of the study was to investigate the main clinical manifestations of sarcoidosis in SOD, depending on the peculiarities of the disease course and to compare the frequency and severity of pulmonary and extrapulmonary manifestations of sarcoidosis, including myocardial lesions and electrocardiographic (ECG) signs of heart rhythm disorders.Methods. In the period 2006– 2016, the pilot open prospective uncontrolled study conducted at the Pulmonology Department of the Regional State Autonomous Healthcare Institution "Tomsk Regional Clinical Hospital" included patients (n = 84) aged 20–67 years with the diagnosis of SOD. Patients were divided into 2 clinical groups: the 1st comprised 45 (53.5%) patients with a favorable course of sarcoidosis, the second one included 39 (46.4%) patients with an unfavorable course of the disease. A full range of studies was carried out, including the analysis of medical history and clinical and epidemiological data, instrumental methods (including ECG and Holter ECG monitoring (HM), pathomorphological study of lung biopsy samples.Results. According to the data of frequency analysis of occurrence of pulmonary and extrapulmonary clinical manifestations in ODS, it was shown that the leading clinical manifestations, most frequently occurring in patients of both groups, included asthenia syndrome (72.6%), bronchial syndrome (66.7%) and fever syndrome (33%). In 33% of cases, clinical manifestations of myocardial damage were detected. In 41 (51.2%) patients in both groups, changes on ECG were recorded at rest. Regardless of the course of the disease, in 23.5% of patients of both clinical groups, according to the results of the HM ECG, rhythm and conduction disturbances were found – a combination of ventricular arrhythmias and conduction disorders (ventricular extrasystole and right His bundle branch block of various degrees) and a combination of supraventricular arrhythmias and conduction disturbances (supraventricular extrasystole and right His bundle branch block of various degrees).Conclusion. Thus, regardless of the severity of the disease course, SOD patients are concerned about complaints from both respiratory system and extrapulmonary manifestations, including cardiac complaints, as well as heart rhythm and conduction disorders (according to the results of ECG and HM ECG), the frequency of which, according to the comparative analysis, has not significantly changed in both clinical groups, which indicates the non-specific character of clinical manifestations. Как правило, поражение сердца у больных саркоидозом органов дыхания (СОД) своевременно не диагностируется, поэтому весьма важной и актуальной задачей является обнаружение часто встречающихся нарушений сердечного ритма и проводимости.Целью исследования явились изучение основных клинических проявлений при СОД в зависимости от особенностей течения заболевания и сравнительная оценка частоты и тяжести легочных и внелегочных проявлений саркоидоза, включая поражения миокарда и электрокардиографические (ЭКГ) признаки нарушений сердечного ритма.Материалы и методы. В период 2006–2016 гг. в пилотное открытое проспективное неконтролируемое исследование, проведенное в отделении пульмонологии на базе Областного государственного автономного учреждения здравоохранения «Томская областная клиническая больница», были включены пациенты (n = 84) в возрасте 20– 67 лет с диагнозом СОД. Больные были распределены на 2 клинические группы: 1-ю составили 45 (53,5 %) пациентов с благоприятным течением саркоидоза, 2-ю – 39 (46,4 %) больных с неблагоприятным течением заболевания. Проведен полный спектр исследований, включая анализ анамнестических и клинико-эпидемиологических данных, инструментальные методы (включая ЭКГ и холтеровское мониторирование (ХМ) ЭКГ), патоморфологическое исследование биоптатов легких.Результаты. По данным частотного анализа встречаемости легочных и внелегочных клинических проявлений при СОД показано, что ведущими клиническими проявлениями, встречающимися наиболее часто у пациентов обеих групп, являлись синдромы астении (72,6 %), бронхитический синдром (66,7 %), синдром лихорадки (33 %). В 33 % случаев выявлены клинические проявления поражения миокарда. У 41 (51,2 %) пациента в обеих группах в состоянии покоя зафиксированы изменения на ЭКГ. Независимо от течения заболевания, у 23,5 % больных обеих клинических групп по результатам ХМ ЭКГ обнаружены нарушения ритма и проводимости – сочетание желудочковых аритмий и нарушений проводимости (желудочковая экстрасистолия и блокада правой ножки пучка Гиса разной степени) и сочетание наджелудочковых аритмий и нарушений проводимости (суправентрикулярная экстрасистолия и блокада правой ножки пучка Гиса разной степени).Заключение. Таким образом, независимо от тяжести течения заболевания, больных СОД беспокоят жалобы как со стороны дыхательной системы, так и внелегочные проявления, включая кардиальные, а также нарушения ритма сердца и проводимости (по результатам ЭКГ и ХМ ЭКГ), частота встречаемости которых, по результатам сравнительного анализа, в обеих клинических группах достоверно не изменялась, что свидетельствует о неспецифичности клинических проявлений.

Equus kiang (Perissodactyla: Equidae)

Equus kiang Moorcroft, 1841, is an equid commonly called the kiang or Tibetan wild ass and is the only equid living on the Tibetan Plateau. It is the largest of the wild asses, with a distinct dark-brown coat on the back, and 1 of the 7 species of Equus. It is endemic to the high-elevation rangelands of China (Tibet, Xinjiang, Qinghai, and Gansu), India (Ladakh and Sikkim), Pakistan (Khunjerab National Park), and Nepal (Mustang). It inhabits open steppes and rolling hills sparsely vegetated with grasses and sedges. E. kiang is vulnerable to illegal poaching and competition with domestic livestock, and data are insufficient to accurately estimate its total abundance