53 research outputs found

    Robert Valentine, Six Sonatas for Two Violoncellos: A Performance Edition

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    This document is an edition of the Sonate à due Violoncelli (Six Sonatas for Two Violoncellos) by Robert Valentine based on a microfilm belonging to the Music Library of University of Memphis, which is a reproduction of the original and the only existing manuscript of this work belonging to the British Library (Mus. Ms. 54207). The introductory chapter addresses the life and musical activity of the composer. Succeeding chapters present details about the six sonatas, such as the description of the manuscript, time and place of composition, style of composition, and performance practice issues. The Apprendices offer a critical edition of Valentine\u27s Six Sonatas, an ornamented edition of the first sonata, and a few facsimile pages of the manuscript. A recording of the critical version and the ornamented version of the Sonata Prima is attaced to the written document as a guide for performers

    A characterization of four B16 murine melanoma cell sublines molecular fingerprint and proliferation behavior

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    Background: One of the most popular and versatile model of murine melanoma is by inoculating B16 cells in the syngeneic C57BL6J mouse strain. A characterization of different B16 modified cell sub-lines will be of real practical interest. For this aim, modern analytical tools like surface enhanced Raman spectroscopy/scattering (SERS) and MTT were employed to characterize both chemical composition and proliferation behavior of the selected cells. Methods: High quality SERS signal was recorded from each of the four types of B16 cell sub-lines: B164A5, B16GMCSF, B16FLT3, B16F10, in order to observe the differences between a parent cell line (B164A5) and other derived B16 cell sub-lines. Cells were incubated with silver nanoparticles of 50–100 nm diameter and the nanoparticles uptake inside the cells cytoplasm was proved by transmission electron microscopy (TEM) investigations. In order to characterize proliferation, growth curves of the four B16 cell lines, using different cell numbers and FCS concentration were obtained employing the MTT proliferation assay. For correlations doubling time were calculated. Results: SERS bands allowed the identification inside the cells of the main bio-molecular components such as: proteins, nucleic acids, and lipids. An "on and off" SERS effect was constantly present, which may be explained in terms of the employed laser power, as well as the possible different orientations of the adsorbed species in the cells in respect to the Ag nanoparticles. MTT results showed that among the four tested cell sub-lines B16 F10 is the most proliferative and B164A5 has the lower growth capacity. Regarding B16FLT3 cells and B16GMCSF cells, they present proliferation ability in between with slight slower potency for B16GMCSF cells. Conclusion: Molecular fingerprint and proliferation behavior of four B16 melanoma cell sub-lines were elucidated by associating SERS investigations with MTT proliferation assay

    Ekspresja adiponektyny w otyłości trzewnej jest istotnym wyznacznikiem insulinooporności w otyłości olbrzymiej

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    Introduction: Visceral adiposity is associated with decreased serum adiponectin levels, peripheral resistance to insulin and an increased risk of cardio-metabolic complications. However, the link between adiponectin expression in visceral adipose tissue (VAT), its serum levels and metabolic protection is controversial. The aim of this study was to investigate the relationship between the adiponectin gene expression in VAT and clinical and metabolic parameters in patients with severe obesity. Material and Methods: This is a cross-sectional study that included 51 severely obese patients (age 43.24±11.29 years, BMI 45.13±8.67 kg/m2), extensively evaluated clinically and biologically (metabolic tests, serum adiponectin measurements, HOMA-IR) before bariatric surgery. Omental adipose tissue was sampled during the intervention and the relative quantification of adiponectin gene expression was performed by real-time PCR, using beta-actin as reference gene. Results. Adiponectin mRNA in VAT was significantly higher in obese insulin-sensitive patients than in the rest of obese patients (p < 0.05) and negatively correlated with HOMA-IR (r =-0.354, p=0.016) and uric acid (r =-0.304, p=0.045). After adjustment for gender, TG/HDL ratio and uric acid, adiponectin expresion (β= -0.439, p=0.001), waist circumference (β=0.467, p=0.001) and serum adiponectin (β =-0.339, p=0.011) remained significantly associated with HOMA-IR, together explaining more than 50% of its variation. Conclusions. In severely obese patients, adiponectin gene expression in VAT is negatively correlated with serum levels of uric acid and is an independent determinant, together with anthropometric parameters of visceral obesity and serum adiponectin levels, of insulin resistance.Wstęp: Otyłość trzewna związana jest ze zmniejszonym stężeniem adiponektyny w surowicy krwi, obwodową opornością na działanie insuliny oraz ze zwiększonym ryzykiem powikłań sercowo-metabolicznych. Jednak związek między ekspresją adiponektyny w trzewnej tkance tłuszczowej, jej stężeniem w surowicy krwi a ochroną metaboliczną jest kwestią sporną. Celem niniejszej pracy było zbadanie związku między ekspresją genu adiponektyny w trzewnej tkance tłuszczowej a klinicznymi i metabolicznymi parametrami pacjentów ze znaczną otyłością. Materiał i metody: To przekrojowe badanie obejmowało 51 znacznie otyłych pacjentów (wiek 43,24 ± 11,29 roku, BMI 45,13 ± 8,67 kg/m2), szczegółowo ocenionych pod względem klinicznym i biologicznym (testy metaboliczne, pomiary stężenia adiponektyny w surowicy krwi, wskaźnik HOMA-IR) przed operacją bariatryczną. Podczas operacji pobrano tkankę tłuszczową sieci. Względna ocena ilościowa ekspresji genu adiponektyny była przeprowadzona metodą PCR w czasie rzeczywistym. Wyniki: Poziom mRNA adiponektyny w trzewnej tkance tłuszczowej był znacząco wyższy u otyłych pacjentów wrażliwych na insulinę niż u pozostałych otyłych pacjentów (p &lt; 0,05) oraz ujemnie skorelowany ze wskaźnikiem HOMA-IR (r = –0,354, p = 0,016) i kwasem moczowym (r = –0,304, p = 0.045). Po uwzględnieniu płci, wskaźnika TG/HDL i kwasu moczowego, ekspresja adiponektyny (β = –0,439, p = 0,001), obwód talii (β = 0,467, p = 0,001) i poziom adiponektyny w surowicy krwi (β = –0,339, p = 0,011) pozostały istotnie związane ze wskaźnikiem HOMA-IR, łącznie wyjaśniając ponad 50% jego wariancji. Wnioski: W przypadku znacznie otyłych pacjentów ekspresja genu adiponektyny w trzewnej tkance tłuszczowej jest ujemnie skorelowana ze stężeniem kwasu moczowego w surowicy krwi i razem z antropometrycznymi parametrami otyłości trzewnej oraz stężeniem adiponektyny w surowicy krwi jest niezależnym wyznacznikiem insulinooporności
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