Cinnamon Oil Nanoemulsions For Inhibition Of Contaminated Pathogens On Asian Seabass Fillet,
2018
Faculty of Science
Cinnamon Oil Nanoemulsions For Inhibition Of Contaminated Pathogens On Asian Seabass Fillet, Piyanan Chuesiang
Chulalongkorn University Theses and Dissertations (Chula ETD)
Cinnamon oil is an effective natural antimicrobial agent, but the utilization is limited by its low water-solubility. In this study, cinnamon oil nanoemulsions were prepared using a phase inversion temperature (PIT) method, which simply involves heating a mixture of surfactant, oil, and water about the PIT and then quench cooling with stirring. The impact of oil phase composition (cinnamon to ripening inhibitor ratio) and surfactant concentration on the formation, stability, antimicrobial activity and chemical stability of the nanoemulsions were determined. Optimal mean droplet diameters with narrow size distribution were obtained at intermediate cinnamon oil levels (30-40 wt%) in the oil …
การรักษาสมบัติเชิงหน้าที่ของน้ำมันหอมระเหยจากมะแขว่น Zanthoxylum Limonella Alston
ในไมโครแคปซูลด้วยวิธีคอมเพล็กซ์โคแอเซอร์เวชัน,
2018
คณะวิทยาศาสตร์
การรักษาสมบัติเชิงหน้าที่ของน้ำมันหอมระเหยจากมะแขว่น Zanthoxylum Limonella Alston ในไมโครแคปซูลด้วยวิธีคอมเพล็กซ์โคแอเซอร์เวชัน, จิระภัทร บุญยิ่ง
Chulalongkorn University Theses and Dissertations (Chula ETD)
มะแขว่น (Zanthoxylum limonella Alston) เป็นพืชพื้นเมืองที่พบในแถบภาคเหนือตอนบนของประเทศไทย นิยมใช้เป็นเครื่องเทศชูกลิ่นรสในอาหาร ช่วยให้อาหารมีกลิ่นหอมน่ารับประทาน สารระเหยหลักที่พบในน้ำมันหอมระเหยจากมะแขว่นประกอบด้วย D-limonene, alpha-phellandrene และ alpha-pinene ซึ่งทำให้มีกลิ่นคล้ายส้ม และมีฤทธิ์ในการต้านออกซิเดชันสูง อย่างไรก็ตามสารออกฤทธิ์ในน้ำมันหอมระเหยเหล่านี้ถูกทำลายได้โดย ความร้อน ความชื้น แสง และออกซิเจน ดังนั้นจึงควรปกป้องสารระเหยด้วยวิธีเอ็นแคปซูเลชัน ซึ่งคอมเพล็กซ์โคแอเซอร์เวชัน เป็นหนึ่งในวิธีการกักเก็บสารที่นิยมใช้ โดยเกิดขึ้นจากอันตรกิริยาระหว่างประจุที่แตกต่างกันของสารละลายพอลิเมอร์ โดยนิยมใช้โปรตีนเป็นสารให้ประจุบวก (polycation) และพอลิแซ็กคาไรด์เป็นสารให้ประจุลบ (polyanion) งานวิจัยนี้จึงมีวัตถุประสงค์เพื่อศึกษาภาวะที่เหมาะสมในการกักเก็บน้ำมันหอมระเหยจากมะแขว่นในไมโครแคปซูล และวิเคราะห์สมบัติทางเคมี และกายภาพของไมโครแคปซูลที่ได้ โดยสารเคลือบที่ใช้ศึกษาเป็นพอลิแซ็กคาไรด์ 3 ชนิด ได้แก่ แอลจิเนต (ALG) กัมอะราบิก (GAB) และแซนแทนกัม (XTG) ร่วมกับโปรตีนเจลาติน (GEL) วิเคราะห์ร้อยละการผลิต (EY) ประสิทธิภาพในการกักเก็บ (EE) สมบัติการต้านออกซิเดชัน หมู่ฟังก์ชัน (ด้วยเทคนิคฟูเรียร์ทรานสฟอร์มอินฟราเรดสเปกโตรสโกปี, FTIR) และโครงสร้างจุลภาค (ด้วยกล้องจุลทรรศน์อิเล็กตรอนแบบส่องกราด, SEM) ของไมโครแคปซูล พบว่าไมโครแคปซูลที่เตรียมโดยใช้สารเคลือบ GEL ร่วมกับ GAB ให้ผลที่ดีที่สุด นอกจากนี้ผลการวิเคราะห์ FTIR ยืนยันว่าเกิดอันตรกิริยาระหว่างพอลิแซ็กคาไรด์ทั้ง 3 ชนิดกับ GEL และสารเคลือบทั้งหมดไม่ทำปฏิกิริยากับน้ำมันหอมระเหยที่กักเก็บภายใน จากนั้นศึกษาปัจจัยของ pH (3.20-4.20) อัตราส่วนของโปรตีนต่อพอลิแซ็กคาไรด์ (GEL:GAB; 1.00-2.00) และอัตราส่วนระหว่างสารเคลือบต่อน้ำมันหอมระเหย (wall:core; 1.00-5.00) ที่ส่งผลต่อค่า EY และ EE ด้วยวิธีพื้นผิวตอบสนอง (RSM) พบว่าภาวะที่เหมาะสมในการกักเก็บน้ำมันหอมระเหยจากมะแขว่นมีดังนี้ pH เท่ากับ 4.00 GEL:GAB เท่ากับ 1.55 และ wall:core เท่ากับ 2.50 อีกทั้งไมโครแคปซูลที่เตรียมขึ้นโดยใช้ภาวะดังกล่าวมีประสิทธิภาพในการเก็บรักษาสารระเหยดีมาก
Multifunctional Properties Of Bacillus Cell Autolysate As Antimicrobial And Coloring Agents In Foods,
2018
Faculty of Science
Multifunctional Properties Of Bacillus Cell Autolysate As Antimicrobial And Coloring Agents In Foods, Bekti Wulan Sari
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research aimed to evaluate feasibility of pigments from halophilic Bacillus as coloring agent having multi-bioactivity in foods. Those Bacillus were isolated from Thai traditional salty fermented fish (plara) and identified by 16S rDNA sequencing analysis. Five strains including Bacillus sp. 81-2; 13-3; 77-3, Bacillus amyloliquefaciens 34-12, and Bacillus vietnamensis 39-23, with pink-orange, yellow, and yellow-orange pigmentation were selected as representative of each pigment color shade. All of strains were classified as slight halophilic based on salt tolerance determination. Pigment was extracted and subjected to test for antimicrobial (200 mg/ml) and antioxidant activities (50 mg/ml) through disc diffusion and DPPH …
Application Of Konjac Glucomannan To Encapsulate And Stabilize The Curcumin In Milk System,
2018
Faculty of Science
Application Of Konjac Glucomannan To Encapsulate And Stabilize The Curcumin In Milk System, Afwa Hayuningtyas
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study investigated the influence of different concentration of konjac glucomannan (KGM) (0, 0.1, 0.2, 0.3 % (w/v)) on the stability of curcumin emulsion in milk system containing 10%, 20%, and 30% (v/v) oil volume fraction. The data of creaming index, curcumin concentration, apparent viscosity, and color were obtained to investigate the stability of the system. Emulsions that reached the physical stability until 14 days of storage at 4ᵒC were subjected to further analysis including antioxidant, particle size, zeta potential, and bioaccessibility by the simulated gastrointestinal tract (GIT). The result suggested that increasing KGM concentration significantly increased the viscosity of …
Green Tea Polyphenols As Potential Food Additives,
2018
Montclair State University
Green Tea Polyphenols As Potential Food Additives, Danxia Shi
Theses, Dissertations and Culminating Projects
As time has progressed, companies have increasingly produced foods for longer term storage. This has led to an increased use of food preservatives in processed foods. People have now come to expect many foods to have a significantly longer shelf life, and this is a matter of government concern for public health due to foodborne contaminations. Foodborne illnesses have become a common problem caused by bacteria (i.e. Escherichia coli). Finding an effective natural preservative source might be better received by the public and alleviate some health concerns over chemical sources. The most important active ingredient found in green tea is …
The Stability Of Tea Polyphenols As A Food Additive And Its Effect On Streptococcus Mutans,
2018
Montclair State University
The Stability Of Tea Polyphenols As A Food Additive And Its Effect On Streptococcus Mutans, Chia-Liang Huang
Theses, Dissertations and Culminating Projects
Dental caries is one of the most concerning chronic diseases, Streptococcus mutans is one the most prominent contributing bacterium. S. mutans metabolizes sugar in processed foods to demineralize the tooth’s surface leading to tooth caries. This study focuses on whether green tea polyphenols epigallocatechin gallate (EGCG), and/or its modifications, palmitoyl-epigallocatechin gallate (P-EGCG) and epigallocatechin-3-gallate-stearate (EGCG-S), can reduce the number of S. mutans in different concentrations of sucrose. A colony forming unit assay was utilized to test viability. Results suggested that the tea polyphenols were efficient in inhibiting S. mutans up to 5 grams of sucrose per 100ml of artificial saliva …
Randomised Controlled Trial Comparing Daily Versus Depot Vitamin D3 Therapy In 0-16-Year-Old Newly Settled Refugees In Western Australia Over A Period Of 40 Weeks,
2018
Edith Cowan University
Randomised Controlled Trial Comparing Daily Versus Depot Vitamin D3 Therapy In 0-16-Year-Old Newly Settled Refugees In Western Australia Over A Period Of 40 Weeks, Ushma D. Wadia, Wayne Soon, Paola T. Chivers, Aesen Thambiran, David P. Burgner, Sarah Cherian, Aris Siafarikas
Research outputs 2014 to 2021
Vitamin D deficiency is highly prevalent in newly settled refugees in Western Australia (WA). If adherence to daily vitamin D therapy is problematic, depot therapy is a therapeutic alternative. The aim of this studywas to compare daily versus depot treatment and factors influencing the therapeutic outcome. Newly settled refugees (n = 151) with 25(OH)D levels less than 78 nmol/L were randomised to receive daily or depot vitamin D therapy with eight weekly interval follow up to 40 weeks. Biochemical and clinical parameters were collected at each visit. Generalized LinearMixedModels (GLMM) examined the longitudinal changes over time controlling for confounders including …
Dietary Nitrate And Diet Quality: An Examination Of Changing Dietary Intakes Within A Representative Sample Of Australian Women,
2018
Edith Cowan University
Dietary Nitrate And Diet Quality: An Examination Of Changing Dietary Intakes Within A Representative Sample Of Australian Women, Jacklyn K. Jackson, Amanda J. Patterson, Lesley K. Macdonald-Wicks, Catherine P. Bondonno, Lauren C. Blekkenhorst, Natalie C. Ward, Jonathan M. Hodgson, Julie E. Byles, Mark A. Mcevoy
Research outputs 2014 to 2021
Dietary nitrate is increasingly linked to a variety of beneficial health outcomes. Our purpose was to estimate dietary nitrate consumption and identify key dietary changes which have occurred over time within a representative sample of Australian women. Women from the 1946–1951 cohort of the Australian Longitudinal Study on Women’s Health with complete food frequency questionnaire data for both 2001 and 2013 were included for analysis. Dietary nitrate intakes were calculated using key published nitrate databases. Diet quality scores including the Australian Recommended Food Score, the Mediterranean Diet Score and the Nutrient Rich Foods Index were calculated along with food group …
Relationships Between Factors Influencing Biofilm Formation And Pathogen Retention In Complex Rhizosphere Microbial Communities,
2018
Wilfrid Laurier University
Relationships Between Factors Influencing Biofilm Formation And Pathogen Retention In Complex Rhizosphere Microbial Communities, Aaron Coristine
Theses and Dissertations (Comprehensive)
Riparian wetlands are unique habitats facilitating all forms of life. The riverbanks of these environments provide ideal conditions for bacteria, plants, and higher organisms. Of particular interest to this research was the variation in microbial community structure at high, intermediate and poor water quality impacted areas. Assessing the capabilities of plants to retain microbial pathogens was identified. Root systems and corresponding soil are ideal locations for bacterial deposition, resulting in attachment at these areas. Biofilm production in these regions is important for long-term establishment, leading to persistence and potential naturalization. Opportunistic pathogens originating from mammalian fecal matter are introduced into …
Structural Characterization And Antioxiant, Moisture-Absording And Moisture-Retention Properties Of Polysaccharides Of Sophora Japonica L.,
2017
College of Agriculture and Biotechnology, Hexi University, Zhangye, Gansu 734000, China; Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities, Zhangye, Gansu 734000, China
Structural Characterization And Antioxiant, Moisture-Absording And Moisture-Retention Properties Of Polysaccharides Of Sophora Japonica L., Li Caixia, Zheng Xue, Gao Haining, Zhang Yong
Food and Machinery
The polysaccharides from the seeds and peel of Sophora japonica L. were extracted respectively by double enzymes, The basic structure of polysaccharides were identified by using infrared spectroscopy,and antioxidant activity, moisture absorption and retention capacities of polysaccharides were evaluated. The results indicated that the polysaccharides extraction yield of Sophora japonica L. seeds and peel were 11.6% and 24.7% respectively. The IR spectrum indicated peel and seed polysaccharides had typical characteristic absorption peaks of polysaccharides and pyran ring structure, seed polysaccharides contained a-glycosidic bonds, peel polysaccharides contained α and β glycosidic bonds.The radical scavenging experiment showed that two different polysaccharides of …
Study On Correlation Between Texture Characteristics And Sound Insulation Coefficient Of Bread,
2017
School of Material and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China
Study On Correlation Between Texture Characteristics And Sound Insulation Coefficient Of Bread, Liang Yi, Feng Tao, Zhang Zihan, Wang Jie, Wang Jing
Food and Machinery
The texture parameters and sound insulation coefficients of the whole wheat bread and white bread were measured according to the difference of the standing time, and the least squares regression analysis was carried out according to the maximum Pearson coefficient of sound insulation coefficients. The results showed that the hardness, elasticity, adhesion and chewiness of whole wheat bread were linear with the sound insulation coefficient of specific frequency. However, no significant linear relationship was found in the studies on the white bread.
The Kinetics Of Microwave Drying Ginger Based On The Volatile Detection,
2017
Jiangnan University, Wuxi, Jiangsu 214122, China
The Kinetics Of Microwave Drying Ginger Based On The Volatile Detection, Xu Wanxiu, Li Jing, Li Zhenfeng, Zhu Guanyu, Song Chunfang, Zhang Junsheng
Food and Machinery
The online volatile changes of the ginger on drying process and drying characteristics were analyzed at the four constant drying temperature, 50, 60, 70, 80 ℃, respectively. The volatile emission intensity and quality of the corresponding drying temperature was compared to find out a better drying condition. It was found thatd the drying temperature at 60 ℃ could preserve preferred volatile best and avoid burning occurrence. Moreover, the color difference and rehydration ratio were olso found better.
Uncertainty Evaluation Of The Determination Of Total Sugar， Reducing Sugar， Chlorine， Potassium In Tobacco,
2017
Research and Development Center, China Tobacco Yunnan Industrial Co., Kunming, Yunnan 650231, China
Uncertainty Evaluation Of The Determination Of Total Sugar， Reducing Sugar， Chlorine， Potassium In Tobacco, Xu Yong, Li Chao, Yang Qianxu, Qin Yunhua, Jiang Wei, Liu Zhihua, Wu Yiqin, Jiang Ciqin, Zhang Chengming, Liu Wei
Food and Machinery
The uncertainty in the measurement for determination of the total sugar, reducing sugar, chlorine, potassium in tobacco by the continuous flow method was evaluated with the actual instance. The influence factors on the uncertainty in the measurement for determination of total sugar, reducing sugar, chlorine, potassium content were analyzed, the component and combined uncertainties were calculated, and the expanded uncertainties of the above three components were 0.44%, 0.40%, 0.02% and 0.06%, respectively, which providing the credibility and confidence interval to the measurement results.
Analysis Of The Differences Of Heavy Metal Enrichment Between Silver Carp And Aristichthys Nobilis In East Dongting Lake,
2017
Changyuan Cuisine Vocational and Technical College, Xinxiang, Henan 453000, China
Analysis Of The Differences Of Heavy Metal Enrichment Between Silver Carp And Aristichthys Nobilis In East Dongting Lake, Liu Xiaowei, Lu Weiya, Xue Minmin, Li Zhonghai
Food and Machinery
To evaluate the pollution of heavy metal in east Dongting Lake and analyze the differences of enrichment of heavy metal between silver carp and aristichthys nobilis, this experiment determined the concentration of five different heavy metals, including Cr, Cu, Cd, Pb and Hg, in sediment and tissues of silver carp and Aristichthys nobilis. Results show that the concentration of Cr in sediment belongs to the first state level in soil standard, the concentrations of Cu, Pb and Hg belong to the second state level in soil standard, the concentration of Cd is 2 times of the third state level in …
Antimicrobial Activity And Chemical Composition Of Eucalyptus Essential Oil,
2017
College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
Antimicrobial Activity And Chemical Composition Of Eucalyptus Essential Oil, Ren Xiaoling, Yue Shuli, Xiang Hong, Liu Huiya
Food and Machinery
To study the antimicrobial potential of vapor-phase Eucalyptus essential oil, the antimicrobial activity and minimum inhibitory concentrations (MIC) were evaluated against the tested microorganisms in vapor, liquid and solid phases. The chemical constitutes of Eucalyptus essential oil and its vapor were analyzed by gas chromatography-mass spectrometry (GC-MS) and solid phase microextraction (SPME) GC-MS. The results demonstrated that Eucalyptus essential oil vapor had obvious antimicrobial effect on the tested microorganisms. The antimicrobial activities of Eucalyptus essential oil vapor against Escherichia coli and Staphylococcus aurous were stronger than that against Aspergillus niger. The MIC value (0.045～0.36 mg/mL) in the vapor phase to …
Influence Of Two Ddifferent Nnozzle Fforms On The Flow Ffield And Heat Transferring Characteristics Of Qquick Freezer,
2017
College of Food Sciences &Technology, Shanghai Ocean University, Shanghai 201306, China; Quality Supervision, Inspection and Testing Center for Cold Storage and Refrigeration Equipment, Ministry of Agriculture, Shanghai 201306, China; Shanghai Professiona
Influence Of Two Ddifferent Nnozzle Fforms On The Flow Ffield And Heat Transferring Characteristics Of Qquick Freezer, Wang Jinfeng, Li Wenjun, Xie Jing, Yang Dazhang, Liu Yuyan, Lu Weihua, Yang Xiaoyan
Food and Machinery
In this study, V type slit nozzle and straight seam hole plate in a quick freezer was used to invetigatethe effect by the change of distance (H) between the nozzle and the plate surface on the internal flow field and the pressure field in a freezer with these two kinds of nozzle structures under the same air condition. Moreover, the metal surface heat transfer characteristics were also studied. The results showed that the flow resistance of the straight slot seam orifice was smaller than that of the V type slot nozzle along the cross-flow direction. The pressure range along cross …
Integration Of Chinese Cultural Elements In The Design Of Modern Food Packaging,
2017
Yong Cheng Vocational College, Yongcheng, Henan 476600, China
Integration Of Chinese Cultural Elements In The Design Of Modern Food Packaging, Tian Guikun
Food and Machinery
The integration of Chinese cultural elements in the modern food packaging design, has many important functions, such as catering to the national identity of the domestic consumers, meeting the needs of foreign culture of foreign consumers, and realizing the modernization of Chinese traditional culture. Therefore, it is necessary to make full use of the representative of Chinese culture，such as characters, colors and patterns and their combinations, then through some specific path, including the traditional culture inheritance and innovation, integrating it into the overall brand strategy for food enterprises, and closely integrated with modern science and technology, so that it can …
Study Of Ozone And Electron Beam Irradiation On Degradation Of Zearalenone And Ochratoxin A,
2017
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; School of Food Science and Technol
Study Of Ozone And Electron Beam Irradiation On Degradation Of Zearalenone And Ochratoxin A, Luo Xiaohu, Li Ke, Wang Ren, Xing Jiali, Wang Li, Du Zhihong, Pan Lihong, Sun Dongling, Li Yanan, Chen Zhengxing
Food and Machinery
Mycotoxin contamination caused by Zearalenone (ZEN) and Ochratoxin A (OTA) is widespread for being prone to happen and hard to degrade. In this paper, the effects of ozone and electron beam irradiation (EBI) on the degradation of Zearalenone and Ochratoxin A were investigated. After 10 s of 2.0 mg/L ozone treatment, the ZEN content decreased from 50 μg/mL to concentration undetectable. After 12 kGy of EBI, the degradation rate of ZEN was up to 86% and concentration of ZEN within 0.5～5.0 μg/mL had no significant different (P＜0.05), with the degradation of ZEN being faster in acetonitrile than methanol. After 30 …
Research On Prediction Model Of Egg Freshness Based On Image Processing,
2017
College of Engineering, South China Agricultural University, Guangzhou, Guangdong 510642, China; Key Laboratory of Key Technology on Agricultural Machine and Equipment ﹝South China Agricultural University﹞, Ministry of Education, Guangzhou, Guangdong 5106
Research On Prediction Model Of Egg Freshness Based On Image Processing, Liu Yingying, Zhong Nan
Food and Machinery
Egg freshness is an important index to measure the economic quality of eggs, and 98 eggs’ image information of different storage time were collected. In the meantime, the conventional index, includes the weight, the height of protein and chamber of the egg which reflects the egg freshness were measured. To receive a method of nondestructive examination, using MATLAB image processing toolbox as a research tool to measure the area ratio of egg yolk, chamber height and length of the whole egg size. Analyzing the regression model between weight and chamber height, whole egg’s major-minor axis, the regression model between protein …
Research On Antimicrobial And Antioxidant Activities Of Major Components Of Lemon Peel Essential Oil,
2017
College of Food Engineering and Biotechnology, Hanshan Normal College, Chaozhou, Guangdong 521041, China
Research On Antimicrobial And Antioxidant Activities Of Major Components Of Lemon Peel Essential Oil, Zhang Bin, Hou Xiaozhen, Qin Yi, Ding Xin, Deng Qihai, Huang Linjie
Food and Machinery
Antioxidant and antibacterial activities in vitro of three major components dl-limonene, γ-terpinene and α-terpineol contained in Eureka lemon peel essential oil as well as its compound were explored in mainly in the determination of DPPH free radical as well as OH· free radical scavenging ability and its bacteriostasis size and MIC against Escherichia coli, Bacillus subtilis and Staphylococcus aureus of the three major components. Results showed that dl-limonene, γ-terpinene, α-terpineol had certain scavenging effect on OH· free radical with clearance rate between 48.45%～77.94%; and the scavenging effect of DPPH free radical was higher than that of LEO at the same …
