7 research outputs found

    The electrochemical and spectroscopic characterization of 1,4 and 1,8-aminoanthraquinone derivatives

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    The acid base properties of 1,4 and 1,8-anthraquinone derivatives were determined in methanol and acetonitrile by pH-spectroscopic measurements. The examined compounds was also characterized by electrochemically using cyclic voltammetry in DMSO solutions

    Influence of substituent on spectroscopic and acid-base properties of anthraquinone derivatives

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    A series of 1,4-disubstituted aminoanthraquinones has been prepared from 1,4 ditosyloksyanthraquinone. The potentiometric and UV-spectrophotometric method have been used to study the acid-base properties of obtained compounds. The absorption spectra revealed the presence of vibroelectronic band in visible region for compounds containing two tertiary nitrogen groups. It indicates the separation of vibronic states in the molecule. Determined pKa values in acetonitrile used as a solvent indicate the influence of substitution of amino group on basicity of the anthraquinone moiety

    Personalna historia oty艂o艣ci ma znaczenie. Oty艂o艣膰 wieku m艂odzie艅czego mo偶e wp艂ywa膰 na wyniki odleg艂e operacji omini臋cia 偶o艂膮dka u doros艂ych

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    Introduction: The influence of adolescent obesity on weight loss following bariatric surgery in adults has not been evaluated. The purpose of this study was to determine the impact of prior adolescent obesity on long-term weight changes following Roux-en-Y gastric bypass (RYGB) in adulthood. Material and methods: This single centre retrospective cohort study evaluated changes in body mass index (BMI) after RYGB within 9–13 years. Questionnaires were sent by post to patients (n = 147) operated on between January 1999 and December 2003 in the Department of General and Transplant Surgery of Medical University, Lodz, Poland. Long-term data was obtained from 33.33% (n = 49, mean age 46.1 ± 10.7 years). Preoperative, nadir and actual BMI and differences between these values were calculated. Data was analysed with a cut-off BMI at 18 years old of 30 and 35 units (U). Results: Patients with a BMI of more than 30 and 35 U in adulthood regained more weight after initial achievement of nadir total weight loss compared to their only adult obese counterparts. Preoperative BMI varied by weight at 18 years old (p = 0.02), while value and time to nadir postoperative BMI and actual BMI were comparable. Conclusion: Adolescent obesity may be a risk factor for long-term RYGB failure. Surgery cannot be definitively curative in this group of patients, and continued active conservative treatment is required.Wst臋p: Dotychczas nie oceniano wp艂ywu oty艂o艣ci wieku m艂odzie艅czego na utrat臋 masy cia艂a po operacjach bariatrycznych. Celem badania by艂o okre艣lenie odleg艂ych zmian masy cia艂a po operacji omini臋cia 偶o艂膮dka (RYGB) wykonywanych u doros艂ych, kt贸rzy byli otyli w wieku m艂odzie艅czym. Materia艂y i metody: W jednoo艣rodkowym badaniu kohortowym poddano ocenie zmiany wska藕nika masy cia艂a (BMI) w okresie 9–13 lat po RYGB. Do chorych operowanych w Klinice Chirurgii Og贸lnej i Transplantacyjnej Uniwersytetu Medycznego w 艁odzi w latach 1999–2003 (n = 147) wys艂ano kwestionariusze drog膮 pocztow膮. Wyniki odleg艂e leczenia uzyskano w 33,33% przypadk贸w (n = 49, 艣rednia wieku 46,1 ± 10,7 roku). Wyliczono przedoperacyjne, minimalne oraz aktualne BMI oraz r贸偶nice pomi臋dzy nimi. Dane analizowano przy punkcie odci臋cia dla BMI w 18. roku 偶ycia wynosz膮cym 30 i 35 jednostek. Wyniki: Przyrost masy cia艂a po wcze艣niejszym osi膮gni臋ciu jej minimalnej warto艣ci by艂 wi臋kszy u chorych z BMI wy偶szym od 30 i 35 j. w wieku m艂odzie艅czym, w por贸wnaniu do os贸b oty艂ych jedynie w wieku doros艂ym. Wykazano r贸偶nice w przedoperacyjnym BMI w zale偶no艣ci od masy cia艂a w 18 roku 偶ycia (p = 0,02), podczas gdy warto艣膰 i czas do osi膮gni臋cia minimalnego pooperacyjnego oraz aktualnego BMI by艂y por贸wnywalne dla analizowanych grup. Wnioski: Oty艂o艣膰 wieku m艂odzie艅czego mo偶e by膰 czynnikiem ryzyka nawrotu oty艂o艣ci po RYGB. W tej grupie chorych odleg艂e wyniki operacji mog膮 by膰 niezadowalaj膮ce, dlatego konieczne jest dalsze aktywne leczenie zachowawcze tych chorych
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