The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
S Chrubasik - One of the best experts on this subject based on the ideXlab platform.
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the evidence for clinical efficacy of rose hip and seed a systematic review
Phytotherapy Research, 2006Co-Authors: C Chrubasik, Rujee K Duke, S ChrubasikAbstract:Background The objective of this review is to evaluate whether clinical research has gained any evidence of effectiveness of Rosa canina preparations. Methods Several databases and other sources were searched to identify randomized controlled trials of Rosa canina preparations. Results Trials were described in a narrative way, taking into consideration methodological quality scores. Four trials were included in this review and two were identified as subgroup analyses. Conclusions Moderate evidence exists for the use of a powder of the seeds and husks of a Rosa canina subspecies in patients suffering from osteoarthritis. Copyright © 2006 John Wiley & Sons, Ltd.
Ali Adnan Hayaloglu - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of volatiles, phenolic compounds and antioxidant activities of rose hip (Rosa L.) fruits in Turkey
LWT - Food Science and Technology, 2014Co-Authors: Nurullah Demir, Oktay Yildiz, M. Alpaslan, Ali Adnan HayalogluAbstract:Abstract Five different rose hip ( Rosa L.) species including Rosa canina, Rosa dumalis, Rosa gallica, Rosa dumalis subsp. boissieri and Rosa hirtissima grown in Turkey are studied. Phenolic compounds, organic acids, sugar and volatile compounds of five different species of rose hips are studied. Total phenolic contents of the rose hip fruits were significantly influenced by species and the levels of total flavonoid and tartaric esters were almost identical in the samples. Antioxidant activities and antiradical scavenging capacities of the extracts were high levels in all rose hip species. It is noticeable that organic acid and sugar contents of the fruits were highly dependence of species and the high levels of ascorbic acid were characteristic. In total, eighteen different phenolic compounds were identified in rose hip species by RP-HPLC-DAD method and, in particular, R. dumalis subsp. boissieri contained different phenolic compounds. Gallic acid, catechin, procyanidin-B2 and hydroxycinnamic acid derivatives (chlorogenic, t -caffeic, p -coumaric, ferrulic and sinapic acids) were principal for all rose hip species. A total of 52 volatile compounds were identified in rose hip species by SPME/GC-MS and it was characterized by abundance of alcohols and aldehydes with also some monoterpenes and sesquiterpenes.
Zhekun Zhou - One of the best experts on this subject based on the ideXlab platform.
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a miocene leaf fossil record of Rosa r fortuita n sp from its modern diversity center in sw china
Palaeoworld, 2016Co-Authors: Yongjiang Huang, Zhekun Zhou, Jing Meng, Shitao Zhang, Jian HuangAbstract:Abstract Roses ( Rosa , Rosaceae) are arguably the most admired ornamental plants in the world. Southwestern China is the center of diversity for many extant native species of Rosa and fossils found in this region are critical for understanding the evolution of this genus. Herein, we report a leaf fossil record with good preservation from the late Miocene of Yunnan Province. The opposite and odd-pinnate leaf is composed of seven elliptical leaflets, with close, crenulate, and regular marginal teeth. The stipules are lanceolate and adnate to the petiole. Additionally, the secondary veins are semicraspedodromous, showing the same venation pattern as most living Rosa species in southwestern China. On the basis of the extensive morphological comparisons, we propose a new species, R. fortuita T. Su et Z.K. Zhou n. sp. This is the first confirmed Rosa leaf fossil record in China, and the discovery of R. fortuita n. sp. indicates that Rosa existed in southwestern China by the late Miocene. It suggests that Rosa was distributed in subtropical or temperate forests and shared a similar ecological niche as Rosa in Europe during the Oligocene and Miocene. The modern diversification of Rosa in southwestern China is thought to have been closely associated with the continuous uplift of the Qinghai-Tibet Plateau since the late Miocene, creating complex topography and a variety of climate conditions.
Steven Kiefer - One of the best experts on this subject based on the ideXlab platform.
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Commercialization of Deployable Space Systems' roll-out solar array (Rosa) technology for Space Systems Loral (SSL) solar arrays
2016 IEEE Aerospace Conference, 2016Co-Authors: Bao Hoang, Steve White, Brian Spence, Steven KieferAbstract:Deployable Space Systems (DSS) developed an advanced flexible blanket Rosa that provides ultra-low weight, compact stowage volume, high power capability, power modularity, scale-ability, and affordability. Recent NASA and AFRL programs have helped advance the Rosa solar array to Technology Readiness Level (TRL) 6. Space Systems Loral (SSL) has selected this technology for commercial qualification and infusion. SSL is currently developing and qualifying Rosa technology as part of a next generation power generating system for future geosynchronous (GEO) spacecraft, advanced NASA and DOD missions. The generic benefits (vs. standard rigid array technology) of adopting a flexible blanket solar array for the GEO application will be presented. An overview of the SSL Rosa qualification program will be presented in combination with relevant design modeling, key analysis, hardware build, validation testing tests performed to date, and next steps for implementation.
Guanghong Zhou - One of the best experts on this subject based on the ideXlab platform.
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identification and quantification of adducts between oxidized rosmarinic acid and thiol compounds by uhplc ltq orbitrap and maldi tof tof tandem mass spectrometry
Journal of Agricultural and Food Chemistry, 2015Co-Authors: Changbo Tang, Wangang Zhang, Chen Dai, Guanghong ZhouAbstract:LTQ Orbitrap MS/MS was used to identify the adducts between quinones derived from rosmarinic acid (Rosa) and thiol compounds, including cysteine (Cys), glutathione (GSH), and peptides digested from myosin. Two adducts of quinone–Rosa/Cys and quinone–Rosa/2Cys, one quinone–Rosa/GSH adduct, and three quinone–Rosa/peptide adducts were identified by extracted ion and MS2 fragment ion chromatograms. By using MALDI-TOF/TOF MS, the adduction reaction between Rosa and myosin in myofibrillar protein isolates was determined, demonstrating that the accurate reaction site was at Cys949 of myosin. The effect of reaction conditions, including stirring time, temperature, and oxidative stress, on the formation of adducts was further investigated. The formation of quinone–Rosa/Cys and quinone–Rosa/GSH increased with stirring time. Both adducts increased with temperature, whereas the reactivity of the addition reaction of GSH was higher than that of Cys. With increasing oxidation stress, the formation of quinone–Rosa/GSH a...
