8 research outputs found

    Frequency rising sub-THz emission from solar flare ribbons

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    Observations of solar flares at sub-THz frequencies (millimetre and sub-millimetre wavelengths) over the last two decades often show a spectral component rising with frequency. Unlike a typical gyrosynchrotron spectrum decreasing with frequency or a weak thermal component from hot coronal plasma, the observations can demonstrate a high flux level (up to ∼104 solar flux units at 0.4 THz) and fast variability on sub-second timescales. Although, many models have been put forward to explain the puzzling observations, none of them has clear observational support. Here we propose a scenario to explain the intriguing sub-THz observations. We show that the model, based on free-free emission from the plasma of flare ribbons at temperatures 104β€…βˆ’β€…106 K, is consistent with all existing observations of frequency-rising sub-THz flare emission. The model provides a temperature diagnostic of the flaring chromosphere and suggests fast heating and cooling of the dense transition region plasma

    Π‘ΠΈΠ½Π΄Ρ€ΠΎΠΌ ΠΆΠ΅Π»Ρ‚Ρ‹Ρ… Π½ΠΎΠ³Ρ‚Π΅ΠΉ

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    Yellow nail syndrome is an extremely rare syndrome, mainly in people over 50 years of age, occurring both systemically and in isolation and requiring the most careful collection of anamnesis, since this condition has a close relationship with respiratory diseases, malignant neoplasms of internal organs and rheumatoid arthritis. Moreover, this rare disease is not sufficiently studied to fully understand its pathogenesis and effective treatment. Patients pay attention to the yellow color of the nails, associated with the deposition of melanin, bile pigments and hemosiderin in the submarginal space, slowing down the growth and thickening of the nail. It should be noted that the change in the nail plates can be observed long before the other clinical manifestations of this syndrome are detected, and probably this can in some cases serve as a harbinger of incipient changes in the lung tissue, neoplasms and changes in the lymphatic vessels. In this regard, it is extremely important to clearly differentiate this condition and refer patients to related specialists for verification of the diagnosis and further treatment.Π‘ΠΈΠ½Π΄Ρ€ΠΎΠΌ ΠΆΠ΅Π»Ρ‚Ρ‹Ρ… Π½ΠΎΠ³Ρ‚Π΅ΠΉ ΠΊΡ€Π°ΠΉΠ½Π΅ Ρ€Π΅Π΄ΠΊΠΎ Π²ΡΡ‚Ρ€Π΅Ρ‡Π°ΡŽΡ‰ΠΈΠΉΡΡ синдром прСимущСствСнно Ρƒ Π»ΠΈΡ† ΡΡ‚Π°Ρ€ΡˆΠ΅ 50 Π»Π΅Ρ‚, ΠΏΡ€ΠΎΡ‚Π΅ΠΊΠ°ΡŽΡ‰ΠΈΠΉ ΠΊΠ°ΠΊ систСмно, Ρ‚Π°ΠΊ ΠΈ ΠΈΠ·ΠΎΠ»ΠΈΡ€ΠΎΠ²Π°Π½Π½ΠΎ ΠΈ Ρ‚Ρ€Π΅Π±ΡƒΡŽΡ‰ΠΈΠΉ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Ρ‚Ρ‰Π°Ρ‚Π΅Π»ΡŒΠ½ΠΎΠ³ΠΎ сбора Π°Π½Π°ΠΌΠ½Π΅Π·Π°, Ρ‚Π°ΠΊ ΠΊΠ°ΠΊ Ρƒ Π΄Π°Π½Π½ΠΎΠ³ΠΎ состояния Π½Π°Π±Π»ΡŽΠ΄Π°Π΅Ρ‚ΡΡ тСсная взаимосвязь с заболСваниями Π΄Ρ‹Ρ…Π°Ρ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… ΠΏΡƒΡ‚Π΅ΠΉ, злокачСствСнными новообразованиями Π²Π½ΡƒΡ‚Ρ€Π΅Π½Π½ΠΈΡ… ΠΎΡ€Π³Π°Π½ΠΎΠ² ΠΈ Ρ€Π΅Π²ΠΌΠ°Ρ‚ΠΎΠΈΠ΄Π½Ρ‹ΠΌ Π°Ρ€Ρ‚Ρ€ΠΈΡ‚ΠΎΠΌ. Π‘ΠΎΠ»Π΅Π΅ Ρ‚ΠΎΠ³ΠΎ, Π΄Π°Π½Π½ΠΎΠ΅ Ρ€Π΅Π΄ΠΊΠΎΠ΅ Π·Π°Π±ΠΎΠ»Π΅Π²Π°Π½ΠΈΠ΅ нСдостаточно ΠΈΠ·ΡƒΡ‡Π΅Π½ΠΎ для ΠΏΠΎΠ»Π½ΠΎΠ³ΠΎ понимания Π΅Π³ΠΎ ΠΏΠ°Ρ‚ΠΎΠ³Π΅Π½Π΅Π·Π° ΠΈ эффСктивного лСчСния. ΠŸΠ°Ρ†ΠΈΠ΅Π½Ρ‚Ρ‹ ΠΎΠ±Ρ€Π°Ρ‰Π°ΡŽΡ‚ Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ Π½Π° ΠΆΠ΅Π»Ρ‚Ρ‹ΠΉ Ρ†Π²Π΅Ρ‚ Π½ΠΎΠ³Ρ‚Π΅ΠΉ, связанный с ΠΎΡ‚Π»ΠΎΠΆΠ΅Π½ΠΈΠ΅ΠΌ Π² ΠΏΠΎΠ΄Π½ΠΎΠ³Ρ‚Π΅Π²ΠΎΠΌ пространствС ΠΌΠ΅Π»Π°Π½ΠΈΠ½Π°, ΠΆΠ΅Π»Ρ‡Π½Ρ‹Ρ… ΠΏΠΈΠ³ΠΌΠ΅Π½Ρ‚ΠΎΠ² ΠΈ гСмосидСрина, Π·Π°ΠΌΠ΅Π΄Π»Π΅Π½ΠΈΠ΅ роста ΠΈ ΡƒΡ‚ΠΎΠ»Ρ‰Π΅Π½ΠΈΠ΅ ногтя. Π‘Π»Π΅Π΄ΡƒΠ΅Ρ‚ ΠΎΡ‚ΠΌΠ΅Ρ‚ΠΈΡ‚ΡŒ, Ρ‡Ρ‚ΠΎ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π½ΠΎΠ³Ρ‚Π΅Π²Ρ‹Ρ… пластин ΠΌΠΎΠΆΠ΅Ρ‚ Π½Π°Π±Π»ΡŽΠ΄Π°Ρ‚ΡŒΡΡ Π·Π°Π΄ΠΎΠ»Π³ΠΎ Π΄ΠΎ Ρ‚ΠΎΠ³ΠΎ, ΠΊΠ°ΠΊ ΠΎΠ±Π½Π°Ρ€ΡƒΠΆΠΈΠ²Π°ΡŽΡ‚ΡΡ ΠΎΡΡ‚Π°Π»ΡŒΠ½Ρ‹Π΅ клиничСскиС проявлСния Π΄Π°Π½Π½ΠΎΠ³ΠΎ синдрома, ΠΈ, вСроятно, это ΠΌΠΎΠΆΠ΅Ρ‚ Π² Π½Π΅ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Ρ… случаях ΡΠ»ΡƒΠΆΠΈΡ‚ΡŒ прСдвСстником Π½Π°Ρ‡ΠΈΠ½Π°ΡŽΡ‰ΠΈΡ…ΡΡ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ Π² Π»Π΅Π³ΠΎΡ‡Π½ΠΎΠΉ Ρ‚ΠΊΠ°Π½ΠΈ, Π½ΠΎΠ²ΠΎΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Π½ΠΈΠΉ ΠΈ измСнСния лимфатичСских сосудов. Π’ связи с этим ΠΊΡ€Π°ΠΉΠ½Π΅ Π²Π°ΠΆΠ½ΠΎ Ρ‡Π΅Ρ‚ΠΊΠΎ Π΄ΠΈΡ„Ρ„Π΅Ρ€Π΅Π½Ρ†ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ Π΄Π°Π½Π½ΠΎΠ΅ состояниС ΠΈ Π½Π°ΠΏΡ€Π°Π²Π»ΡΡ‚ΡŒ ΠΏΠ°Ρ†ΠΈΠ΅Π½Ρ‚ΠΎΠ² ΠΊ смСТным спСциалистам для Π²Π΅Ρ€ΠΈΡ„ΠΈΠΊΠ°Ρ†ΠΈΠΈ Π΄ΠΈΠ°Π³Π½ΠΎΠ·Π° ΠΈ дальнСйшСго лСчСния

    Π›ΠΈΠ½Π΅ΠΉΠ½Ρ‹ΠΉ IGA-зависимый Π±ΡƒΠ»Π»Π΅Π·Π½Ρ‹ΠΉ Π΄Π΅Ρ€ΠΌΠ°Ρ‚ΠΎΠ· Ρƒ Ρ€Π΅Π±Π΅Π½ΠΊΠ° 2 Π»Π΅Ρ‚

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    Linear IgA-dependent bullous dermatosis is a rare subepidermal bladderworm disease that occurs in both adults and children. The pathogenesis of the disease, regardless of age, is the same, where the basis is the autoimmune response to antigens of the basal membrane zones of the skin, the clinical picture in childhood differs from the manifestations at an older age, having a clear picture and localization of manifestations. The causes of the onset of the disease in older people are most often associated with taking medications, manifested as a side effect of the therapy being taken, cancer, and in children, both an acquired character and a genetic predisposition are responsible for the manifestation of linear IgA-dependent bullous dermatosis. The diagnosis can be confirmed by histological and immunofluorescence analysis.Π›ΠΈΠ½Π΅ΠΉΠ½Ρ‹ΠΉ IgA-зависимый Π±ΡƒΠ»Π»Π΅Π·Π½Ρ‹ΠΉ Π΄Π΅Ρ€ΠΌΠ°Ρ‚ΠΎΠ· являСтся Ρ€Π΅Π΄ΠΊΠΈΠΌ Π·Π°Π±ΠΎΠ»Π΅Π²Π°Π½ΠΈΠ΅ΠΌ с ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΡƒΠ±ΡΠΏΠΈΠ΄Π΅Ρ€ΠΌΠ°Π»ΡŒΠ½Ρ‹Ρ… ΠΏΡƒΠ·Ρ‹Ρ€Π΅ΠΉ, ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ΅ Π½Π°Π±Π»ΡŽΠ΄Π°Π΅Ρ‚ΡΡ ΠΊΠ°ΠΊ Ρƒ взрослых, Ρ‚Π°ΠΊ ΠΈ Ρƒ Π΄Π΅Ρ‚Π΅ΠΉ. ΠŸΠ°Ρ‚ΠΎΠ³Π΅Π½Π΅Π· Π±ΠΎΠ»Π΅Π·Π½ΠΈ Π²Π½Π΅ зависимости ΠΎΡ‚ возраста ΠΎΠ΄ΠΈΠ½Π°ΠΊΠΎΠ², Π² основС Π»Π΅ΠΆΠΈΡ‚ Π°ΡƒΡ‚ΠΎΠΈΠΌΠΌΡƒΠ½Π½Ρ‹ΠΉ ΠΎΡ‚Π²Π΅Ρ‚ Π½Π° Π°Π½Ρ‚ΠΈΠ³Π΅Π½Ρ‹ Π·ΠΎΠ½ базальной ΠΌΠ΅ΠΌΠ±Ρ€Π°Π½Ρ‹ ΠΊΠΎΠΆΠΈ, клиничСская ΠΊΠ°Ρ€Ρ‚ΠΈΠ½Π° Π² дСтском возрастС разнится с проявлСниями Π² Π±ΠΎΠ»Π΅Π΅ ΡΡ‚Π°Ρ€ΡˆΠ΅ΠΌ возрастС, имСя ΠΎΡ‚Ρ‡Π΅Ρ‚Π»ΠΈΠ²ΡƒΡŽ ΠΊΠ°Ρ€Ρ‚ΠΈΠ½Ρƒ ΠΈ Π»ΠΎΠΊΠ°Π»ΠΈΠ·Π°Ρ†ΠΈΡŽ проявлСний. ΠŸΡ€ΠΈΡ‡ΠΈΠ½Ρ‹ возникновСния заболСвания Ρƒ Π»ΠΈΡ† ΡΡ‚Π°Ρ€ΡˆΠ΅Π³ΠΎ возраста Ρ‡Π°Ρ‰Π΅ всСго связаны с ΠΏΡ€ΠΈΠ΅ΠΌΠΎΠΌ лСкарствСнных срСдств, ΠΏΡ€ΠΎΡΠ²Π»ΡΡΡΡŒ ΠΊΠ°ΠΊ ΠΏΠΎΠ±ΠΎΡ‡Π½Ρ‹ΠΉ эффСкт ΠΎΡ‚ ΠΏΡ€ΠΈΠ½ΠΈΠΌΠ°Π΅ΠΌΠΎΠΉ Ρ‚Π΅Ρ€Π°ΠΏΠΈΠΈ, онкологичСскими заболСваниями, Π° Ρƒ Π΄Π΅Ρ‚Π΅ΠΉ Π·Π° проявлСниС Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠ³ΠΎ IgA-зависимого Π±ΡƒΠ»Π»Π΅Π·Π½ΠΎΠ³ΠΎ Π΄Π΅Ρ€ΠΌΠ°Ρ‚ΠΎΠ·Π° нСсут ΠΎΡ‚Π²Π΅Ρ‚ΡΡ‚Π²Π΅Π½Π½ΠΎΡΡ‚ΡŒ ΠΊΠ°ΠΊ ΠΏΡ€ΠΈΠΎΠ±Ρ€Π΅Ρ‚Π΅Π½Π½Ρ‹ΠΉ Ρ…Π°Ρ€Π°ΠΊΡ‚Π΅Ρ€, Ρ‚Π°ΠΊ ΠΈ гСнСтичСская ΠΏΡ€Π΅Π΄Ρ€Π°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½Π½ΠΎΡΡ‚ΡŒ. Π”ΠΈΠ°Π³Π½ΠΎΠ· ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ ΠΏΠΎΠ΄Ρ‚Π²Π΅Ρ€ΠΆΠ΄Π΅Π½ гистологичСским ΠΈ ΠΈΠΌΠΌΡƒΠ½ΠΎΡ„Π»ΡŽΠΎΡ€Π΅ΡΡ†Π΅Π½Ρ‚Π½Ρ‹ΠΌ Π°Π½Π°Π»ΠΈΠ·ΠΎΠΌ
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