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Fractionation of edible bird’s nest glycoprotein hydrolysates:characterisation and antioxidative activities of the fractions

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Food Science and Human Wellness 2022年第4期11卷 886-894页

作者： Poh Kei chong Sue Lian Mun Lee Sin Chang Abdul Salam Babji Seng joe Lim Department of Food Sciences Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Department of Food Science and Nutrition Faculty of Applied SciencesUCSI University Kuala LumpurNo.1Jalan Menara GadingUCSI Heights 56000 CherasKuala LumpurMalaysia Innovation Centre for Confectionery Technology(MANIS) Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Centre for Innovation and Technology Transfer(INOVASI-UKM) ChancelleryUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia

E dible bird’s nest(EBN)hydrolysates have been proven to exhibit enhanced ***,being a macromolecule,fractions with different molecular weights would have different properties and ***,this research was aimed to determine the chemical properties and antioxidant activities of freezedried(EBN_(FD))and spray-dried EBN(EBN_(SD))hydrolysates fractionated using gel permeation chromatography(GPC).Overall,two well-separated fractions were identified(EBN_(fFD1),EBN_(fFD2),EBN_(fSD1) and EBN_(fSD2)).EBNFD demonstrated significantly higher(P≤0.05)peptide(3.6%),total carbohydrate(27.7%)and sialic acid(18.2%)contents than that of *** trend was observed in low molecular weight fractionates(EBN_(fFD2) and EBN_(fSD2)).Meanwhile,the first fractionates(EBN_(fFD1) and EBN_(fSD1))exhibited significantly higher(P≤0.05)hydroxyl radical(·OH)scavenging *** transform infrared(FTIR)spectroscopy demonstrated that all EBN fractionates have similar spectrum,except in the region of N—H(amideⅡ)and C—H alkyl *** conclusion,EBN fractionates with different molecular weights showed different chemical properties and antioxidant activities.

关键词： Fractionates Gel permeation chromatography Hydrolysates Peptide content Sialic acid

A Novel Antibacterial Dental Resin Composite

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Journal of Biomaterials and Nanobiotechnology 2012年第2期3卷 130-135页

作者： Yiming Weng voon J. chong Leah Howard Ruijie Huang Richard L. Gregory Dong Xie Department of Biomedical Engineering Purdue School of Engineering and Technology Indiana University-Purdue University at Indianapolis Indianapolis USA Department of Oral Biology School of Dentistry Indiana University Indianapolis USA

This study reports the synthesis and evaluation of a novel furanone-containing antibacterial resin composite. Compres-sive strength (CS) and S. mutans viability were used to evaluate the mechanical strength and antibacterial activity of the composites. With 5% to 30% addition of the furanone derivative, the composite showed no change in CS but a significant antibacterial activity with a 16% - 68% reduction in the S. mutans viability. Further, the antibacterial activity of the modified composite was not affected by human saliva. The aging study implies that the modified composite may have a long-lasting antibacterial function. Within the limitations of this study, it appears that this experimental resin composite may potentially be developed into a clinically attractive dental restorative due to its high mechanical strength and antibacterial function.

关键词： Furanone Derivative Antibacterial Resin Composite CS S. mutans Viability

Development of a novel protein multi-blotting device

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Journal of Biomedical Science and Engineering 2010年第12期3卷 1125-1132页

作者： Amin M. Hagyousif voon J. chong Hiroki Yokota Stanley Y. P. Chien 不详

Blotting is a common technique widely used for molecular analysis in life sciences. The Western blot, in particular, is a process of transferring protein samples from a polyacrylamide gel to a blotting membrane and detecting the levels of specific proteins through reactions with primary and secondary antibodies. The state-of-the-art of Western blotting usually generates one blotting membrane per gel. However, multiple copies of blots are useful in many applications. Two blotting copies from a single protein gel, for instance, can be used for identifying a total amount of proteins of interest as well as its specific subpopulation level such as a phosphorylated isoform. To achieve this multi-blotting operation from a single gel, we modified a blotting procedure and developed a novel blotting device. The device consisted of a multi-anode plate and a microcontroller. It was designed to generate a well-controlled electrophoretic voltage profile, which allowed a quasi-uniform transfer of proteins of any size. The prototype device was built and its operation procedure was described. The experimental results clearly supported the notion that the described device was able to achieve multiple blotting from a single gel and reduce time and cost for protein analysis.

关键词： Western Blotting Protein Transfer Multi-Blotting PWM

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跟踪多个电压的简单器件

电子产品世界 2006年第6S期13卷 76-80页

作者： joe chong Maxim公司

大功率多电压系统在上电和断电期间必须跟踪电源电压,以防止可能立即引起对系统损坏的闭锁条件发生.更坏的情况是闭锁可能会引起潜在的损坏,导致系统现场失效.

关键词：电源电压跟踪器件电压系统系统损坏闭锁

The MPC Attitude Control with Integration for VELOX-Ⅱ

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The MPC Attitude Control with Integration for VELOX-Ⅱ

东革阿里中活性成分宽缨酮的提取及纯化工艺研究

第三十九届中国控制会议

作者： Xiaohua Zhang Ling Keck voon Lim Wee Seng chong Kwang Tong Zhengliang Lu Xiang Zhang Wenhe Liao School of Mechanical Engineering Nanjing University of Science and Technology School of Electrical and Electronic Engineering Nanyang Technological University

VELOX-II that has been launched on 16 th December 2015 is the second CubeSat built by the Satellite Research Centre（SaRC） of Nanyang Technological University（NTU）. However, according to the operation data of VELOX-II in orbit, it can be observed that there is a large steady state error and the error becomes the most crucial factor for the pointing error. In this paper,Model Predictive Control（MPC） with integration was proposed in order to offset the steady state error. At first, the MPC with integration was based on a state space model with an incremental input aiming to add an integral item. Secondly, a quadratic cost function was designed to derive the control law of MPC with integration. Finally, a series of analysis and simulations were implemented for VELOX-II’s MPC, PD, Sliding Mode Control（SMC） and MPC with integration, respectively. The theory analysis and simulation results revealed that the steady state error is from environmental and actuator’s disturbances, and it can not be offset by VELOX-II’s MPC, PD and SMC controllers, but can be eliminated by the MPC controller with integration;comparing with PID, the MPC has much improved attitude tracking performance, especially in the aspect of time delay;different with SMC, the MPC with integration is easy to be come true on the 8051 chip because of the smaller amount of computations and codes;VELOX-II using the MPC controller with integration can achieve a higher pointing accuracy.

关键词： VELOX-II MPC with Integration quadratic cost function steady state error

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中国药学杂志 2016年第14期51卷 1169-1175页

作者：李红亮于秀颖马崇鸣 Kiew Lik-voon Mohammad Rais Mustafa 李卫国田景奎浙江大学生物医学工程与仪器科学学院杭州310027 南京理工大学泰州科技学院江苏泰州225300 马来亚大学医学院药学系马来西亚吉隆坡50603 常熟求是科技有限公司江苏常熟215500

目的优选东革阿里的提取纯化工艺。方法以宽缨酮Eurycomanone(EN)的转移率为考察指标,综合采用单因素实验和正交实验,通过对乙醇浓度、提取时间、溶剂用量、提取次数的考察,优选东革阿里合理的提取工艺;在静态吸附和解吸实验筛选树脂的... 详细信息

目的优选东革阿里的提取纯化工艺。方法以宽缨酮Eurycomanone(EN)的转移率为考察指标,综合采用单因素实验和正交实验,通过对乙醇浓度、提取时间、溶剂用量、提取次数的考察,优选东革阿里合理的提取工艺;在静态吸附和解吸实验筛选树脂的基础上,结合单因素和正交实验优选东革阿里采用大孔树脂纯化的工艺。结果东革阿里的最佳提取工艺为:加20倍量水回流提取2次,第一次2h,第二次1h;最佳纯化工艺为:采用HPD100型大孔树脂,以70%饱吸附量上样,上样液质量浓度0.25 g生药·m L-1,上样流速3 BV·h-1,洗脱乙醇体积分数30%,洗脱流速3B V·h-1。结论优选出的工艺操作简单、稳定可行、重复性好,可推广于工业化生产应用。

关键词：东革阿里宽缨酮正交实验提取工艺纯化工艺

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高可靠系统的电源电压监控和定序

电子产品世界 2005年第1A期12卷 91-94页

作者： joe chong Jay Scolio Maxim公司

对于多数电子系统,用上电复位(POR)电路监控系统电压能保证正确的上电初始化.用POR监测降低电压跌路也使程序运行问题(可使存储器不可靠或导致系统不能正确运行)最少.为了改善高端系统的可靠性,系统电源必须有正确的时序,以防止其微控制... 详细信息

对于多数电子系统,用上电复位(POR)电路监控系统电压能保证正确的上电初始化.用POR监测降低电压跌路也使程序运行问题(可使存储器不可靠或导致系统不能正确运行)最少.为了改善高端系统的可靠性,系统电源必须有正确的时序,以防止其微控制器,微处理器,DSP或ASIC闭锁,闭锁问题可能导致系统损坏或长期可靠性差.在大多数情况下,一个或多个微处理器监控IC可实现这些定序和监控功能.

关键词：高可靠系统电源电压监控电子系统上电复位电路过压保护电路定序电路导通通路器件

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一种铝合金压铸件的环保型镀钯钢工艺

材料保护 2020年第S1期53卷 30-31页

作者：赖奂汶陈康郭崇武广州超邦化工有限公司广东广州510460

介绍了一种铝合金压铸件的环保型镀钯钢工艺,包括在铝合金基体上依次沉锌、镀酸性锌镍合金、化学镀镍、焦磷酸盐镀铜、镀酸铜、光亮镀镍和镀钯钢。该镀层进行中性盐雾试验120 h无锈蚀,热震试验无起泡或脱落。

关键词：铝合金压铸件镀钯钢酸性锌镍合金电镀化学镀镍耐蚀性

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水平定向钻进辅助系统

水平定向钻进辅助系统