Publications by authors named "Koshelev M"

Detailed analysis of the unique broadband millimeter-wave (70-360 GHz) collision-induced absorption spectra in pure CO and in its mixture with Ar is presented. The nature of the observed continuum absorption is examined using classical trajectory simulation along with statistical physics consideration. Bimolecular continuum is decomposed in the phase space into separate contributions from the so-called free, quasibound, and true bound molecular pairs, the proportions of which greatly vary with temperature.

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Interest in subspecialty training remains high for dermatology residency graduates. Fellowship program directors (FPDs) are largely responsible for fellowship organization and development. Here, we study the dermatology fellowship leadership landscape and identify notable differences in the characteristics of current dermatopathology, paediatric dermatology, and Mohs micrographic surgery and dermatologic oncology FPDs.

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The results of a rigorous study of the two first pure rotational transitions of CO perturbed by Ar are presented. The experimental part is based on the use of three different spectrometers covering together the pressure range from 0.02 up to 1500 torr.

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Article Synopsis
  • Macular amyloidosis is a type of skin condition caused by amyloid deposits, often presenting as dark macules and itching in affected areas.
  • A case study details a 74-year-old patient showing unusual follicular-based macules on multiple parts of the body, leading to a diagnosis of macular amyloidosis through biopsy results.
  • The report highlights a rare presentation of the condition, discusses the typical appearance of hyperpigmented macules, and mentions emerging treatment options like Janus Kinase inhibitors.
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Many dermatology residency programs adapted to the COVID-19 pandemic by transitioning to online teaching methods. This may impact the quality of education and the satisfaction of residents. Dermatology faculty and residents nationwide were surveyed regarding their experiences with the novel online curricula.

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Primary care physicians (PCPs) are often the first line of defense against skin cancers. Despite this, many PCPs do not receive a comprehensive training in skin conditions. Educational interventions aimed at skin cancer screening instruction for PCPs offer an opportunity to detect skin cancer at earlier stages and subsequent improved morbidity and mortality.

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A dearth of skin of color (SOC) education exists among dermatology residency programs despite the increasingly diverse United States population; a 2008 study reported that 52% of dermatology residency programs had didactic sessions or lectures focusing on diseases in SOC. In the last decade, no new studies have examined the state of residency SOC education. In this study, dermatology residents across the United States were surveyed anonymously about SOC education at their residency program, satisfaction with SOC education, opinions on improving SOC education, and perspective on cultural competence.

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Many dermatology residency programs lack sufficient didactics and experiences with patients with skin of color (SOC). This may impact resident confidence with this patient population, which may affect patient satisfaction and perceptions of care. Dermatology residents nationwide were surveyed to determine their confidence in care of patients with SOC and white skin across several dimensions, including detailing morphology, making diagnostic and therapeutic decisions, tailoring treatment recommendations, and detecting suspicious lesions.

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Granular cell tumors (GCTs), sometimes called Abrikossoff tumors, are rare and typically benign soft tissue tumors. Malignant GCTs, which are even rarer than benign GCTs, can occur and must be detected early given their high mortality rate. Distinguishing between benign and malignant GCTs is difficult clinically; however, histologic evaluation plays an essential role in this endeavor.

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Article Synopsis
  • Acrokeratoelastoidosis (AKE) is a rare skin condition characterized by keratotic papules on the palms and soles, typically inherited in an autosomal dominant pattern, with some sporadic cases observed.
  • A case involving an 11-year-old girl with asthma is discussed, along with a review of three similar cases in children, suggesting a potential link between AKE and asthma.
  • Current research on AKE's causes and treatments is limited, emphasizing the need for further investigations to explore the relationship between AKE and asthma, which could lead to better treatment options.
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Cutaneous non-tuberculous mycobacterial (NTM) infections have rapidly increased in incidence in recent years. Currently there is no standard treatment and the variable and nonspecific ways in which cutaneous NTM infection presents makes it a therapeutic and diagnostic challenge. We describe a 67-year-old immunocompetent woman with cutaneous NTM infection after she recently underwent a root canal procedure.

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Transient receptor potential vanilloid type 1 (TRPV1) is found on sensory neurons, keratinocytes, sebocytes, and dendritic cells. Activated TRPV1 channels are believed to help propagate the itch sensation. Therefore, there has been great interest in targeting TRPV1 to treat pruritus.

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Hydroxyurea is a chemotherapeutic agent that is used in the treatment of various hematological diseases including chronic myelogenous leukemia, polycythemia vera, and sickle cell anemia. Hydroxyurea is also used to treat psoriasis. Drug-induced hyperpigmentation is a known cutaneous side effect of hydroxyurea along with xerosis, dermal ulcers, and dermatomyositis-like eruptions.

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Linear IgA bullous dermatosis is a rare autoimmune vesiculobullous disease characterized by linear deposition of IgA along the basement membrane zone. It is classically idiopathic, but may also arise secondary to drug exposure. A heterogeneous spectrum of clinical features has been described, including a rare, morbid variant mimicking toxic epidermal necrolysis.

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New experimental results regarding "warm" water dimer spectra under equilibrium conditions are presented. An almost equidistant series of six peaks corresponding to the merged individual lines of the bound dimer with consecutive rotational quantum numbers is studied in the 188-258 GHz frequency range in water vapour over a broad range of pressures and temperatures relevant to the Earth's atmosphere. The series is a continuation of the sequence detected earlier at lower frequencies at room temperature.

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Cutaneous leishmaniasis is rarely seen in the United States. Four Cuban immigrants traveled along the same route at different times from Cuba to Ecuador, then northward, including through the Darién Jungle in Panama. These patients had chronic ulcerative non-healing skin lesions and were given a diagnosis of leishmaniasis.

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