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Combined enzymatic hydrolysis and herbal extracts fortification to boost in vitro antioxidant activity of edible bird's nest solution

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Chinese Herbal Medicines 2021年第4期13卷 549-555页

作者： Pei Ling Tang Hooi shin Goh swee seng sia Department of Bioscience Faculty of Applied SciencesTunku Abdul Rahman University CollegeSetapak53300 Kuala LumpurMalaysia nestlin Malaysia sdn.Bhd. 3AJalan PayamasTaman Industri PayamasTangkak 84900JohorMalaysia

Objective:edible bird’s nest(EBN)is a popular traditional tonic food in Chinese population for centuries.Malaysia is one of the main EBN suppliers in the world.This study aims to explore the best strategy to boost the antioxidant potential of EBN solution.Methods:In this study,the raw EBN(4%,mass to volume ratio)was initially enzymatic hydrolyzed using papain enzyme to produce EBN hydrolysate(EBNH),then spray-dried into powdered form.Next,4%(mass to volume ratio)of EBNH powder was dissolved in ginger extract(GE),mulberry leaf extract(MLE)and cinnamon twig extract(CTE)to detect the changes of antioxidant activities,respectively.Results:Results obtained suggest that enzymatic hydrolysis significantly reduced the viscosity of 4%EBN solution from(68.12±0.69)m Pa·s to(7.84±0.31)m Pa·s.Besides,the total phenolic content(TPC),total flavonoid content(TFC),total soluble protein,DPPH scavenging activity and ferric reducing antioxidant power(FRAP)were substantially increased following EBN hydrolysis using papain enzyme.In addition,fortification with GE,MLE and CTE had further improved the TPC,TFC,DPPH scavenging activity and FRAP of the EBNH solution.Among the samples,MLE-EBNH solution showed the most superior antioxidant potential at(86.39±1.66)%of DPPH scavenging activity and(19.79±2.96)mmol/L FesO;of FRAP.Conclusion:This study proved that combined enzymatic hydrolysis and MLE fortification is the best strategy to produce EBN product with prominent in vitro antioxidant potential.This preliminary study provides new insight into the compatibility of EBN with different herbal extracts for future health food production.

关键词： antioxidant cinnamon twig edible bird’s nest enzymatic hydrolysis ginger mulberry leaves

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Characterization of edible bird’s nest by peptide fingerprinting with principal component analysis

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Food Quality and safety 2017年第1期1卷 83-92页

作者： Chun-Fai Wong Gallant Kar-Lun Chan Ming-Lu Zhang Ping Yao Huang-Quan Lin Tina Ting-Xia Dong Geng Li Xiao-Ping Lai Karl Wah-Keung Tsim Division of Life science and Center for Chinese Medicine R&D The Hong Kong University of Science and TechnologyClear Water BayKowloon HKUsT shenzhen Research Institute Hi-Tech ParkNanshan school of Chinese Herbal Medicine Guangzhou University of Chinese Medicine Dongguan Mathematical Engineering Academy of Chinese Medicine Guangzhou University of Chinese MedicineChina

OBJECTIVEs:Proteins are the major component and play a key role in nutritious and therapeutic functions of edible bird’s nest(EBN);however,limited studies have been conducted on the protein due to difficulties in extraction,isolation as well as identification.This study aimed to provide comprehensive information for the quality evaluation of EBN peptides,which would be a valuable reference for further study on EBN proteins.METHODs:Here,we developed a quality control method using high performance liquid chromatography(HPLC)peptide fingerprints deriving from EBN being digested with simulated gastric fluid.The characteristic peptide peaks were collected and identified by LC-Ms/Ms.REsULTs:The characteristic peptide peaks,corresponding to the protein fragments of acidic mammalian chitinase-like,lysyl oxidase,and Mucin-5AC-like,were identified and quantified.Interestingly,the principal component analysis indicated that the fingerprints were able to discriminate colour of EBN(white/red)and production sites(cave/house)of White EBN on the same weight basis.As proposed by the model developed in this study,Muc-5AC-like and AMCaselike proteins were the markers with the highest discriminative power.CONCLUsIONs:The overall findings suggest that HPLC peptide fingerprints were able to clearly demonstrate peptide profile differences between genuine and adulterated EBN samples;and classify EBN samples by its color and production site.In addition,the protein identification results suggested that Muc-5AC-like protein was the major protein in EBN.

关键词： edible bird’s nest Peptide fingerprint Mucin-5AC-like Acidic mammalian chitinase-like Principal component analysis

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Preliminary nitrite, nitrate and colour analysis of Malaysian edible bird’s nest

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Information Processing in Agriculture 2015年第1期2卷 1-5页

作者： Meei Chien Quek Nyuk Ling Chin Yus Aniza Yusof sheau Wei Tan Chung Lim Law Department of Process and Food Engineering Faculty of EngineeringUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia Laboratory of Vaccines and Immunotherapeutics Institute of BioscienceUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia Department of Chemical Engineering Faculty of EngineeringUniversity of NottinghamMalaysia CampusJalan Broga43500 SemenyihSelangorMalaysia

The high nitrite content in edible bird’s nests is a major concern to the local swiftlet industry.It lowers the price of the edible bird’s nests and it brings severe health hazards to consumers and farmers.This research investigated the nitrite and nitrate contents of eight types of local edible bird’s nests by using ion chromatography system and evaluating its colour using the CIE system in L^*a^*b^*parameters.The nitrite content obtained ranged from 5.7 lg/g for the house nests to 843.8 lg/g for the cave nests.The nitrate content for the house and cave nests was 98.2 lg/g and 36,999.4 lg/g,respectively.The cave nests with darker and redder colour had higher nitrite and nitrate contents than the brighter and more yellow house nests.This likely suggests that the nitrite and nitrate contents have correlations with edible bird’s nests colour.Correlations studies suggested that the nitrite content had high correlations with colour parameters,L^*a^*b^*of edible bird’s nests at significant level of Pse findings suggest that edible bird’s nests’colour may be a useful indicator for measuring nitrite and nitrate contaminations.

关键词： Nitrite Nitrate Colour Ion chromatography edible bird’s nest

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A sustainable way of agricultural livelihood:edible bird’s nests in Indonesia

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Ecosystem Health and sustainability 2021年第1期7卷 332-341页

作者： Yutaka Ito Ken’ichi Matsumoto Aswin Usup Yuki Yamamoto Faculty of Regional Policy The University of ShimaneMatsueJapan Faculty of Economics Toyo UniversityTokyoJapan Faculty of Agriculture University of Palangka RayaPalangkarayaIndonesia Graduate school of Fisheries and Environmental sciences Nagasaki UniversityNagasakiJapan

edible birds’nests(EBNs)have traditionally been produced in southeast Asia.Indonesian farmers construct buildings for swiftlets and harvest their nests.EBN farming does not directly degrade forest resources and is therefore considered a sustainable means of production,whereas the expansion of other agricultural activities often relies on the degradation of natural resources.This study examines the relationship between natural resources and agricultural livelihoods,focusing on Indonesian EBN farmers.Using survey data that we collected in 2017,combined with satellite information on the extent of the forest in Central Kalimantan,Indonesia,we measured production efficiency and identified the natural and social factors that enhance production performance.The results show that a forest extent ranging between 2,000 and 6,000 meters from nesting building is positively associated with the production efficiency of EBN farming,perhaps because extensive forest could help swiftlets to collect food and build nests.Conversely,while EBN farming is a sustainable and profitable option,the initial costs of constructing buildings to house swiftlets may deter farmers from participating in the process.

关键词： edible bird’s nest swiftlet Indonesia forest natural habitat ecosystem services satellite data

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