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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

Enzymatic recovery of glycopeptides from different industrial grades edible bird’s nest and its by-products:nutrient,probiotic and antioxidant activities,and physicochemical characteristics

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Food Science and Human Wellness 2022年第6期11卷 1555-1564页

作者： Hidayati Syamimi Mohd Noor Rafi dah Mohd Ariff Lee Sin Chang Xin Yi Chai Hui Yan Tan Nur’Aliah Daud Abdul Salam Babji seng joe lim Faculty of Science and Technology Universiti Kebangsaan MalaysiaBangi 43600Malaysia International Institute for Halal Research and Training(INHART) International Islamic University Malaysia(IIUM)Jalan Gombak 53100Malaysia Faculty of Applied Sciences UCSI University Kuala LumpurCheras 56000Malaysia Faculty of Agriculture Science and Technology Universiti Putra Malaysia Bintulu CampusBintulu 97008Malaysia Innovative Centre for Confectionery Technology(MANIS) Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaBangi 43600Malaysia

This study was conducted to recover edible bird’s nest(EBN)hydrolysates from different grades of EBN,including the industrial by-products,using enzymatic *** nutrient,physicochemical properties and antioxidant activities of the recovered hydrolysates at different hydrolysis times were *** showed that the recovery yield of enzymatic hydrolysis was above 89%for all grades of EBN and the degree of hydrolysis increased over *** content(0.321-0.433 mg/L)was below the permissible tolerance level for all ***,the antioxidant activities(DPPH and ABTS scavenging activities and ferric reducing antioxidant powder(FRAP)activity)were significantly higher(P≤0.05)in hydrolysates recovered from EBN by-products(EBNhC and EBNhD)as compared to the high grade EBN hydrolysates(EBNhA and EBNhB).The in-vitro probiotic activity of EBN and its hydrolysates were examined using the probiotic bacterium Lactobacillus ***,EBN by-products hydrolysate(EBNhD)recorded the highest number of ***(1.1×1011 CFU/mL),indicating that low grade EBN has the potential as prebiotic material that promotes probiotic *** study demonstrated the concept of using EBN by-products hydrolysates for various applications,such as functional ingredients with enhanced bioactivities,to improve its economic value.

关键词： Edible bird’s nest by-products Enzymatic hydrolysis Glycopeptides Lactobacillus plantarum Probiotic activity

Design of Multi-layered Protection Against Guided Mortar Threats Yhrough Numerical Modeling

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Defence Technology（防务技术） 2023年第11期29卷 55-65页

作者： Bonny Thawani seng Kiat lim Laura Brown Richard Critchley Rachael Hazael Cranfield Forensic Institute Cranfield UniversityDefence Academy of the United KingdomShrivenhamSN68LAUK

The trade—off between protection and weight is a constant consideration when designing a portable protective *** mobility is a desirable attribute and protection must therefore adapt,prompting a demand for lightweight,simple to construct,low-cost and effective ballistic protection *** strength and ductility,wave spreading capability and good energy absorption are key properties for ballistic *** materials,polycarbonate,Kevlar?-epoxy,polyurethane foam,and aluminium alloy,possess these properties and were selected for analysis by numerical *** configurations were proven to be an optimal solution,by exploiting the advantages of each material without having large penalties of mass and *** modelling using ANSYS AUTODYN?is used to simulate monolithic and multi-layered target configurations,to obtain the penetration mitigation *** results are analysed to select configurations based on different requirements,such as lowest cost,lowest mass,best performance,and optimal configuration which balanced the three key parameters *** optimal configuration of Aluminium,Kevlar-Epoxy,Polyurethane,and Polycarbonate has layers with thickness of 7,3,38,2 mm respectively with a total mass of 7.97 kg,total cost of$39.86 and penetration of 29.34%(14.67 mm).Polynomial relationships between performance and mass/cost are also determined.

关键词： Hydrocode Fragmentation High velocity Composite structures Foams

Outcomes of a non-randomised audit of single pigtail suture stents in urolithiasis management of Asian patients in Singapore

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Asian Journal of Urology 2024年第2期11卷 324-330页

作者： Ee Jean lim Zhen Wei Choo Reshma Mangat Pradeep Durai Sarvajit Biligere Yiquan Tan Loh Hin Yeung Marcus Nicole Andrea Seet Li Ting Chin Tiong Heng Stefania Ferreti Vineet Gauhar Urology Department Singapore General HospitalSingapore Urology Department Tan Tock Seng HospitalSingapore Urology Department Ng Teng Fong HospitalSingapore Urology Department Azienda Ospedaliera-Uiversitaria(Hospital and University of Parma)ParmaItaly

Objective:Double-J(DJ)ureteric stents are commonly placed perioperatively for semirigid or flexible ureteroscopic renal *** is believed that lesser stent material within the bladder mitigates stent-related *** study aimed to evaluate the J-Fil ureteral stent,a single pigtail suture stent compared with conventional DJ stent in relation to stent symptoms in an Asian population undergoing ureterorenal ***:Based on internal audit committee recommendation approval,the records of 50 patients retrieved,available data of 41 patients who were prospectively enrolled into two groups(Group 1[J-Fil stent group],n=21 and Group 2[DJ stent group],n=20)between August 2020 to January 2021,were *** compared were nature of procedure,stone location and size,ease of deployment or removal,and complications.A modified universal stent symptom questionnaire was used to assess morbidity of stent symptoms within 48 h of insertion and at ***:Both groups had similar median age,distribution in male to female ratio,and stone *** overall median universal stent symptom questionnaire score at insertion was similar for bladder pain,flank or loin pain,and quality of life between Group 1 and 2;however,at removal Group 1 fared significantly better than Group 2,especially for flank or loin pain and pain at *** groups had similar ease in insertion with no hospital ***:Our audit favoured the single pigtail suture stent in Asian ureters in mitigating stent-related *** showed a good safety profile with easy deployment and *** promises a new standard in stenting.

关键词： Stent Ureteroscopy Pigtail suture stent Asianpatient Flexible ureteroscopic renal surgery

Life-cycle assessment of batteries for peak demand reduction

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Journal of Electronic Science and Technology 2023年第4期21卷 20-34页

作者： Dylon Hao Cheng Lam Yun seng lim Jianhui Wong Siti Nadiah M.Sapihie Department of Electrical and Electronic Engineering Universiti Tunku Abdul RahmanKajang43000Malaysia Group Research&Technology Division PETRONASBandar Baru Bangi43650Malaysia

At present,a life-cycle assessment of energy storage systems(ESSs)is not widely available in the *** an assessment is increasingly vital nowadays as ESS is recognized as one of the important equipment in power systems to reduce peak demands for deferring or avoiding augmentation in the network and power *** the battery cost is still very high at present,a comprehensive assessment is necessary to determine the optimum ESS capacity so that the maximum financial gain is achievable at the end of the batteries’***,an effective life-cycle assessment is proposed in this paper to show how the optimum ESS capacity can be determined such that the maximum net financial gain is achievable at the end of the batteries’lifespan when ESS is used to perform peak demand reductions for the customer or utility *** findings reveal the positive financial viability of ESS on the power grid,otherwise the projection of the financial viability is often seemingly poor due to the high battery cost with a short battery *** improved battery degradation model is used in this assessment,which can simulate the battery degradation accurately in a situation whereby the charging current,discharging current,and temperature of the batteries are intermittent on a site during peak demand *** assessment is crucial to determine the maximum financial benefits brought by ESS.

关键词： Degradation estimation Maximum net savings Peak demand reduction State of health(SOH)estimation

Federated Learning with Privacy-preserving and Model IP-right-protection

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Machine Intelligence Research 2023年第1期20卷 19-37页

作者： Qiang Yang Anbu Huang Lixin Fan Chee seng Chan Jian Han lim Kam Woh Ng Ding Sheng Ong Bowen Li WeBank Shenzhen 518057China Hong Kong University of Science and Technology Hong Kong 999077China University of Malaya Kuala Lumpur 50603Malaysia University of Surrey Guildford GU27XHUK University of Aberystwyth Wales SY233DDUK Shanghai Jiao Tong University Shanghai 200240China

In the past decades,artificial intelligence(AI)has achieved unprecedented success,where statistical models become the central entity in ***,the centralized training and inference paradigm for building and using these models is facing more and more privacy and legal *** bridge the gap between data privacy and the need for data fusion,an emerging AI paradigm feder-ated learning(FL)has emerged as an approach for solving data silos and data privacy *** on secure distributed AI,feder-ated learning emphasizes data security throughout the lifecycle,which includes the following steps:data preprocessing,training,evalu-ation,and *** keeps data security by using methods,such as secure multi-party computation(MPC),differential privacy,and hardware solutions,to build and use distributed multiple-party machine-learning systems and statistical models over different data *** data privacy concerns,we argue that the concept of“model”matters,when developing and deploying federated models,they are easy to expose to various kinds of risks including plagiarism,illegal copy,and *** address these issues,we introduce FedIPR,a novel ownership verification scheme,by embedding watermarks into FL models to verify the ownership of FL models and protect model intellectual property rights(IPR or IP-right for short).While security is at the core of FL,there are still many articles re-ferred to distributed machine learning with no security guarantee as“federated learning”,which are not satisfied with the FL definition supposed to *** this end,in this paper,we reiterate the concept of federated learning and propose secure federated learning(SFL),where the ultimate goal is to build trustworthy and safe AI with strong privacy-preserving and *** provide a com-prehensive overview of existing works,including threats,attacks,and defenses in each phase of SFL from the lifecycle perspective.

关键词： Federated learning privacy-preserving machine learning security decentralized learning intellectual property protection

Dynamic Force Reduction and Heat Transfer Improvement for Horizontal Tubes in Large-Particle Gas-Fluidized Beds

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Journal of Thermal Science 2008年第1期17卷 77-83页

作者： Yusumi Nagahashi John R.Grace Kok-seng lim Yutaka Asako Dept.Mech.Eng. Kochi National College of Technol.KochiJAPAN Professor Dept.Chem.Biological Eng. The University of British ColumbiaVancouverCANADA CSIRO Minerals VictoriaAUSTRALIA Dept.Mech.Eng. Tokyo Metropolitan UniversityTokyoJAPAN

力量和热转移上的试管银行配置的效果为二维、三维的煤气的使流体化的床被调查。有效动态力量和热转移系数为几种试管银行配置被测量，并且平均力量比为一个单个试管小，这被发现。热转移系数能被提供足够的空间让粒子在试管银行的双方... 详细信息

力量和热转移上的试管银行配置的效果为二维、三维的煤气的使流体化的床被调查。有效动态力量和热转移系数为几种试管银行配置被测量，并且平均力量比为一个单个试管小，这被发现。热转移系数能被提供足够的空间让粒子在试管银行的双方附近下降增加。结果为优化试管银行的配置当由于动态力量减少试管侵蚀时，完成高热转移系数提供有用指南。

关键词：流化床热传输管状器具环流量

Economic Assessment of Standby Diesel Generator for Peak Reduction in Commercial and Industrial Buildings:A Case Study in Malaysia

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Journal of Electronic Science and Technology 2017年第4期15卷 400-406页

作者： Kein Huat Chua Yun seng lim Jee Xiong Chew Universiti Tunku Abdul Rahman Cheras 43000 Malaysia

This paper outlines the barriers and potential benefits of using standby diesel generators in mitigating the peak demands for commercial and industrial customers. The feasibility of utilizing the standby diesel generators to reduce the electricity bills for customers is carried out by using the hybrid optimization model for electric renewable(HOMER)software. The size of the standby diesel generator and its operational duration are determined based on the lowest cost of electricity obtained from the evaluations. The economic assessments demonstrate that there is potential to reduce the electricity bills for commercial and industrial customers under the existing fuel price and tariffs. The commercial customers under the tariff C2 have the highest potential to save their electricity bills with the use of standby diesel generators for peak reduction. This study demonstrates the potential of the standby diesel generators in peak reduction.

关键词： Commercial and industrial customers cost of electricity hybrid optimization model for electric renewable(HOMER) peak reduction standby diesel generator

Size prediction of κ-carrageenan droplets formed in co-flowing immiscible liquid

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Particuology 2011年第6期9卷 637-643页

作者： Jun-Yee Leong Tek-Kaun lim Ravindra Pogaku Eng-seng Chan Centre of Materials and Minerals School of Engineering and Information Technology Universiti Malaysia Sabah School of Engineering Monash University

The formation of K-carrageenan droplets in channel emulsification was experimentally investigated. The dispersed phase was vertically injected into co-flowing immiscible palm oil in the direction of gravity. This study focused on predicting K-carrageenan drop size using force balance analysis. The force balance model considers the interracial tension to be the solitary attaching force, while a combination of the drag force from the co-flowing palm oil and the body force of the extruding K-carrageenan liquid act as the detaching forces. The conventional model gave poor predictions for droplet size, with an average relative deviation of 23%. This large deviation could be attributed to necking phenomena and an underestimation of the drag force generated on the shear-thinning K-carrageenan solution. By incorporating correction factors, the average relative deviation of the force balance model dronned to 4%.

关键词： K-Carrageenan Droplet Channel emulsification Co-flowing Dripping Bioencapsulation