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| 1 | Evaluation of Heavy Metals and Pesticide Residues in Dendrobium officinale Produced in Guangxi显示文摘[Objectives]To establish a method for the determination of heavy metals and pesticide residues in Dendrobium officinale produced in Guangxi and its culture substrate.[Methods]The contents of five heavy metals(Pb,Cd,As,Hg and Cu)were determined by the atomic absorption spectrophotometric(AAS)method;residues of 9 organochlorine pesticides(α-BHC,β-BHC,γ-BHC,δ-BHC,p,p′-DDT,p,p′-DDE,p,p′-DDD,o,p′-DDT and pentachloronitrobenzene)were determined by gas chromatography(GC).[Results]The contents of five heavy metals in the medicinal materials of D.officinale produced in Guangxi were 0.96,0.21,0.021 mg/kg,and not detected,and 0.35 mg/kg.The contents of five heavy metals in the culture substrate were 0.03,0.19,0.21,0.004 and 1.80 mg/kg,respectively;the content of 9 organochlorine pesticide residues in the sample was not detected.[Conclusions]The detection results of heavy metal content and organochlorine pesticide residues in D.officinale produced in Guangxi and its substrate are consistent with the limit requirements of the Chinese Pharmacopoeia.This experiment is expected to provide reliable data reference for ensuring the safety of the drug resources of D.officinale in Guangxi. | Hua ZHU Ruiting HE Piaoling HUANG Wenqi YANG Anda WEI Yuanjing TAO Zhonghua DAI | 2019 | Medicinal Plant2019，10，5： | 3 |
| 2 | Effective suppression of the photodarkening effect in high-power Yb-doped fiber amplifiers by H2 loading显示文摘The radical suppression of the photodarkening effect and laser performance deterioration via H2 loading were demonstrated in high-power Yb-doped fiber(YDF)amplifiers.The photodarkening loss at equilibrium was114.4 d B/m at 702 nm in the pristine fiber,while it vanished in the H2-loaded fiber.To obtain a deeper understanding of the impact of photodarkening on laser properties,the evolution of the mode instability threshold and output power in fiber amplifiers was investigated.After pumping for 300 min,the mode instability threshold of the pristine fiber dropped from 770 to 612 W,and the periodic fluctuation of the output power became intense,finally reaching 100 W.To address the detrimental effects originating from photodarkening,H2 loading was applied in contrast experiments.The output power remained stable,and no sign of mode instability was observed in the H2-loaded fiber.Moreover,the transmittance at 638 nm confirmed the absence of the photodarkening effect.The results pave the way for the further development of high-power fiber lasers. | RUITING CAO GUI CHEN YISHA CHEN ZHILUN ZHANG XIANFENG LIN BIN DAI LUYUN YANG JINYAN LI | 2020 | Photonics Research2020，8，3： | 2 |
| 3 | Comparative gene expression profiling of normal and human colorectaladenomatous tissues显示文摘 | Gongliang Du Xuehong Fang Wei Dai Ruipeng Zhang Ruiting Liu Xingbo Dang | 2014 | Oncology Letters2014，，5： | 1 |
| 4 | The Research on building cache for Android platform using soft references显示文摘Along with the mobile platform increasing development,Android operating system has become the dominant operating system on mobile platforms.As the result of the limitation of Android system computing environment and network resources,it is especially important to apply Cache technology to improve the efficiency of data access.In this paper,a detail study is made on soft reference technology of mobile platform and soft reference strategy is proposed to build a cache on the Android platform application.It has increased the use of system memory efficiently and data access performance.Meanwhile soft reference object can help the Dalvik virtual machine to manage memory and eliminate potential memory leaks well. | Yongpan Sheng Ruiting Dai | 2013 | 无线互联科技2013，10，7： | 0 |
| 5 | Synthesis of Bio-based Epoxy Containing Phosphine Oxide as a Reactive Additive Toward Highly Toughened and Fire-retarded Epoxy Resins显示文摘The integration of high mechanical toughness,impact strength as well as excellent flame-retardant properties toward epoxy resins(EPs)have always been a dilemma.The inadequate overall performance of EPs severely restricts their sustainable utilization in engineering aspects over long-term.Herein,a new bio-based agent(diglycidyl ether of magnolol phosphine oxide,referred as DGEMP)derived from magnolol(classified as lignan),extracted from natural plants Magnolia officinalis,was successfully synthesized and further employed as a flameretardant reactive additive to diglycidyl ether of bisphenol A(DGEBA).As demonstration,the composite resin,DGEBA/15DGEMP(15 wt%DGEMP),achieved an Underwriters Laboratories-94 V-0 rating with a high limiting oxygen index(LOI)value(41.5%).In cone calorimeter tests,it showed that heat release and smoke production were effectively inhibited during combustion,wherein the peak heat release rate(PHRR)value of DGEBA/15DGEMP was reduced by 50%compared to neat DGEBA.Additionally,it exhibited a superior tensile strength(82.8 MPa),toughness(5.11MJ/m^(3))and impact strength(36.5 k J/m^(2)),much higher than that of neat DGEBA(49.7 MPa,2.05 MJ/m^(3)and 20.9 k J/m^(2)).Thus,it is highly anticipated that DGEMP imparts significantly improved mechanical and fire-retarded properties to conventional EPs,which holds a great potential to address the pressing challenges in EP thermosets industry. | Chunxiang Wei Tianyu Gao Yu Xu Wenjie Yang Guangjian Dai Ruiting Li SanE Zhu Richard K.K.Yuen Wei Yang Hongdian Lu | 2023 | Chinese Journal of Polymer Science2023，41，11： | 0 |
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