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In this paper, ultrasound-assisted extraction (UAE) was applied to the extraction of anthraquinones (aloe-emodin, rhein, emodin, chrysophanol and physcion) from Rheum palmatum L. The five anthraquinones were quantified and analyzed by high performance liquid chromatography coupled with UV detection (HPLC-UV). The extraction solvent, extraction temperature and extraction time parameters, the thr...

1 Blockmans D, De Ceuninck L, Vanderschueren S, Knockaert D, Mortelmans L, Bobbaers H. Repetitive 18-fluorodeoxyglucose positron emission tomography in isolated polymyalgia rheumatica: a prospective study in 35 patients. Rheumatology 2007;46:672–7. 2 Blockmans D, De Ceuninck L, Vanderschueren S, Knockaert D, Mortelmans L, Bobbaers H. Repetitive 18-fluorodeoxyglucose positron emission tomography...

References 1 Schmitz S, Adams R, Walsh CD, et al. A mixed treatment comparison of the efficacy of anti-TNF agents in rheumatoid arthritis for methotrexate non-responders demonstrates differences between treatments: a Bayesian approach. Ann Rheum Dis 2012; 71: 225–230. 2 Pearce F, Johnson SR, Courtney P. Interstitial lung disease following certolizumab pegol. Rheumatology (Oxford) 2012; 51: 578–...

Plant petioles and stems are hierarchical cellular structures, displaying geometrical features defined at multiple length scales. One or more of the intermediate hierarchical levels consists of tissues in which the cellular distribution is quasi-random, a factor that affects the elastic properties of the tissues. The current work focuses on the finite element analysis (FEA) of the constituent t...

To examine whether cultivation reduced genetic variation in the important Chinese medicinal plant Rheum tanguticum, the levels and distribution of genetic variation were investigated using ISSR markers. Fifty-eight R. tanguticum individuals from five cultivated populations were studied. Thirteen primers were used and a total of 320 DNA bands were scored. High levels of genetic diversity were de...

Polygonaceae familyasının türü olan Rheum ribes’in taze gövde ve yaprakları Lübnan, İran Türkiye’nin doğusunda sebze olarak tüketilmektedir. Son zamanlarda farmakolojik alanlarda kullanılan bu bitkiden Asya ülkelerinde saf ilaç materyalleri üretilmektedir. Çalışmamızda, ribes kısımlarından etil asetat, hekzan, metanol su çözücüleri kullanılarak 10-100 mg/mL konsantrasyonlarda hazırlanan özütler...