Utilization Of Natural Green Tea And Grape Seed Extracts And Nisin To Reduce Conventional Chemical Preservatives And To Inhibit The The Growth Of Listeria Monocytogenes In Ready To Eat Low And High Fat Chicken And Turkey Hotdogs,
2012
University of Arkansas
Utilization Of Natural Green Tea And Grape Seed Extracts And Nisin To Reduce Conventional Chemical Preservatives And To Inhibit The The Growth Of Listeria Monocytogenes In Ready To Eat Low And High Fat Chicken And Turkey Hotdogs, Amara Venkata Sunil Perumalla
Graduate Theses and Dissertations
Ready-to-eat meat (RTE) products such as hotdogs represent a popular segment in convenience food purchases. Increased demand has led the processors to extend the shelf life by minimizing lipid oxidation and post-processing contaminants such as Listeria monocytogenes. There is a growing interest in the food processors and consumers regarding the use of natural alternatives in place of synthetic food additives to control the growth of foodborne pathogens and (or) lipid oxidation. In recent years, green tea (GTE) and grape seed extracts (GSE) are increasing choices as they have demonstrated antioxidant as well as antimicrobial properties in various food applications. …
Biological Strategies And Mathematical Approaches For Limiting Bacterial Contaminants And Chemical Pollutants In Bioethanol Fermentations,
2012
University of Arkansas, Fayetteville
Biological Strategies And Mathematical Approaches For Limiting Bacterial Contaminants And Chemical Pollutants In Bioethanol Fermentations, Alia Chahed Ep Limayem
Graduate Theses and Dissertations
During the most recent decades increased interest in fuel from biomass in the United States and worldwide has emerged each time petroleum derived-gasoline registered well publicized spikes in price. The willingness of the U.S. government to face the issues of more heavily high-priced foreign oil and climate change has led to more investment on plant-derived sustainable biofuel sources. Biomass derived from corn has become one of the primary feedstocks for bioethanol production for the past several years in the U.S. However, the argument of whether to use food as biofuel has led to a search for alternative non-food sources. Consequently, …
Chenopodium Berlandieri And The Cultural Origins Of Agriculture In The Eastern Woodlands,
2012
University of Florida
Chenopodium Berlandieri And The Cultural Origins Of Agriculture In The Eastern Woodlands, Daniel Shelton Robinson
Masters Theses
The development of agriculture in the New World has been a topic of prominent historic interest, but one that has ignored some regions in favor of others. The woodlands of Eastern North America have felt this bias in the investigation of agricultural origins, but this has not prevented the development of theories to explain the emergence of a complex of indigenous agricultural plants in the region. Data collection and technological advances have in large part validated these theories, creating a model for domestication. By emphasizing farming over other cultural practices, however, these theories lack explanatory power with regards to the …
Response Surface Methodology Approach For The Optimization Of Lab Fermentation Using Vegetable Based Substrate,
2012
Technological University Dublin
Response Surface Methodology Approach For The Optimization Of Lab Fermentation Using Vegetable Based Substrate, Amit Jaiswal, Nissreen Abu-Ghannam, Juan Valverde
Conference papers
In the present studies, an attempt was made to optimize the conditions for the lactic acid bacteria (LAB) fermentation using Irish York cabbage (Brassica oleracea var. capitata alba subvar. conica) as a substrate. Prior to fermentation with Lactobacillus plantarum, York cabbage was blanched at 95°C for 12 min to inactivate surface microflora. To achieve an optimal fermentation condition which would result in higher release of phytochemicals and antioxidant capacity in the broth, Box-Behnken design integrating a desirability approach was used. The optimized factors (fermentation time 36h, solid/liquid ratio 0.25 g/ml and agitation rate 100 rpm) were used for …
Effect Of Solvents On The Extractability Of Phenolic Constituents And Their Antioxidant Capacity From Irish Seaweed,
2012
Technological University Dublin
Effect Of Solvents On The Extractability Of Phenolic Constituents And Their Antioxidant Capacity From Irish Seaweed, Gaurav Rajauria, Amit Jaiswal, Nissreen Abu-Ghannam
Conference papers
Seaweeds are being used for human consumption in the Orient and help them live longer with low levels of hypertension, cancer and other ailments. The study aimed at extraction of principle constituents using a wide range of solvents and their mixtures on the basis of polarity, from Irish brown seaweeds namely Himanthalia elongata, Laminaria saccharina and Laminaria digitata. All the extracts were screened for total phenolic content (TPC) and their potential antioxidant capacity, using 2, 2´-diphenyl-1-picrylhydrazyl (DPPH) radical and ferric reducing antioxidant power (FRAP) assay. Among all the solvents tested, 60% methanolic extract and equi-volume mixture of chloroform, …
Bioactive Potential Of Marine And Terrestrial Vegetables: A Comparative Study,
2012
Technological University Dublin
Bioactive Potential Of Marine And Terrestrial Vegetables: A Comparative Study, Amit Jaiswal, Gaurav Rajauria, Nissreen Abu-Ghannam
Conference papers
Polyphenols are extensively used in food, beverage, pharmaceuticals and nutraceutical industry for their positive effects on human health. Present study was designed to estimate the differences in polyphenols level and antioxidant capacity between marine and terrestrial vegetables. Considerable variations in the total phenolic content (TPC) and total flavonoid content (TFC) were observed, which ranges from 20.4 to 140.2 mg GAE/g of extracts (dw) for TPC and 15.4 to 50.4 mg QE/g of extracts (dw) for TFC. Furthermore, antioxidant capacity was confirmed by all the extracts. Results showed that marine vegetables had significantly higher polyphenols content and antioxidant property compared to …
Analysis Of Zinc And Copper In Foods,
2012
Stephen F Austin State University
Analysis Of Zinc And Copper In Foods, Merlly Zavala
Undergraduate Research Conference
Deficiencies in vitamins and calcium have always been known and a remedy for it has always been around. The deficiency of copper (Cu) and zinc (Zn) are not very popular and some people do not understand how important the two metals are for one’s health. If one tends to encounter such deficiency the goal is to give foods that contain these metals in order to add to the diet. In this study, various foods were analyzed for Cu or Zn concentration levels using absorptions spectrophotometer Shimadzu AA-6800 flame. The samples were crushed, digested with nitric acid, and then analyzed through …
Strawberry Growth, Yield, Fruit Nutrition, And Control Of Verticillium Wilt With Pre-Plant Soil Fumigants, Ozone, And Biological Control,
2012
California Polytechnic State University, San Luis Obispo
Strawberry Growth, Yield, Fruit Nutrition, And Control Of Verticillium Wilt With Pre-Plant Soil Fumigants, Ozone, And Biological Control, Justin J. Scurich
Master's Theses
Verticillium wilt is a widespread soilborne disease of strawberry historically controlled by soil fumigation with methyl bromide (MB). MB was banned by the United Nations in 1995 and will be completely phased out by 2015. Research has concentrated on alternative methods of disease control without finding a single alternative able to replace MB in widespread disease control and yield increase. For the current study, strawberries were greenhouse grown in container pots filled with soil from both infested and non-infested areas of a commercial strawberry field in Watsonville, CA. Treatments included pre-plant soil fumigation with commercially available formulations of methyl bromide, …
Delicious-Ology: The Science Of Delicious Food,
2012
Washington University in St Louis
Delicious-Ology: The Science Of Delicious Food, Sasha Yan
Undergraduate Theses—Unrestricted
You can read this book two ways. If you want to “just cook,” flip to the recipe index, pick a recipe, and skip straight to that page. The surrounding text will explain some aspects of the science behind the recipe. While the recipes in this book are chosen to complement and provide examples of the science, they’re also recipes that are fantastic in and of themselves.
Evaluation And Identification Of Markers Of Damage In Mushrooms (Agaricus Bisporous) Postharvest Using A Gc/Ms Metabolic Profiling Approach.,
2012
Technological University Dublin
Evaluation And Identification Of Markers Of Damage In Mushrooms (Agaricus Bisporous) Postharvest Using A Gc/Ms Metabolic Profiling Approach., Aoife O'Gorman, Catherine Barry-Ryan, Jesus Maria Frias
Articles
The aim of this research was to use the gas mass spectrometry (GC/MS) profiling method coupled with chemometric tools to profile mechanically damaged and undamaged mushrooms during storage and to identify specific metabolites that may be used as markers of damage. Mushrooms grown under controlled conditions were bruise damaged by vibration to simulate damage during normal transportation. Three damage levels were evaluated; undamaged, damaged for 20 min and damaged for 40 min and two time levels studied; day zero and day one after storage at 48C. Applying this technique over 100 metabolites were identified, quantified and compiled in a library. …
Apple Pomace As A Potential Ingredient For The Development Of New Functional Foods,
2012
Technological University Dublin
Apple Pomace As A Potential Ingredient For The Development Of New Functional Foods, Sofia Reis, Dilip K. Rai, Nissreen Abu-Ghannam
Conference papers
Apple pomace (AP) is the main by-product of cider industry being mainly composed of carbohydrates and dietary fibre, small amounts of protein, fat and ash. In addition AP is also a good source of phytochemicals such as phenolic acids and flavonoids making AP a valuable source of antioxidants. The common applications of this by-product are the direct disposal to soil in a landfill and for pectin recovery usage. These applications are not sufficient to drain the several tonnes produced every year and studies to valorise the AP for other purposes have gained momentum. AP due to its chemical composition, rich …
Optimization Of Lactic Acid Fermentation Of York Cabbage For The Development Of Potential Probiotic Products,
2012
Technological University Dublin
Optimization Of Lactic Acid Fermentation Of York Cabbage For The Development Of Potential Probiotic Products, Amit Jaiswal, Shilpi Gupta, Nissreen Abu-Ghannam
Articles
In the present study, York cabbage was used as the sole substrate for the lactic acid (LA) fermentation with Lactobacillus plantarum. York cabbage was blanched at 95°C for 12min to inactivate surface microflora prior to fermentation. To achieve an optimal fermentation condition which would result in higher release of phytochemicals and antioxidant (AO) capacity in the broth, Box-Behnken design integrating a desirability approach was used. A second-order polynomial equation was developed indicating the effect of solute/liquid ratio, agitation rate and fermentation time on desired parameters. The optimized factors were used for fermenting York cabbage to obtain maximum bacterial growth, …
Water At Room Temperature As A Solvent For The Extraction Of Apple Pomace Phenolic Compounds,
2012
Technological University Dublin
Water At Room Temperature As A Solvent For The Extraction Of Apple Pomace Phenolic Compounds, Sofia Reis, Dilip Rai, Nissreen Abu-Ghannam
Articles
A fractionation method was used for the extraction of phenolic compounds from apple pomace (AP) involving a first extraction with water and subsequent extractions of the same residue with two different organic solvents. The water extracts obtained presented high amounts of phenolic compounds with high antioxidant capacity however, the second and third extractions of the same residue still extracted considerable amounts of remaining phenolic compounds with significant antioxidant capacities. Liquid chromatography – electrospray ionization mass spectrometry (LC-ESI/MS) studies showed water to be a good solvent to extract hydroxycinnamic acids, flavonols, flavanols, dihydrochalcones and flavones present in the AP. However, water …
Antimicrobial, Antioxidant And Free Radical-Scavenging Capacity Of Brown Seaweed Himanthalia Elongata From Western Coast Of Ireland,
2012
Technological University Dublin
Antimicrobial, Antioxidant And Free Radical-Scavenging Capacity Of Brown Seaweed Himanthalia Elongata From Western Coast Of Ireland, Gaurav Rajauria, Amit Jaiswal, Nissreen Abu-Ghannam, Shilpi Gupta
Articles
Water,methanol and mixtures (20–80%) thereof have been used for the extraction of phenolic compounds from Irish brown seaweed Himanthalia elongata for studying its antimicrobial and antioxidant properties.The 60%methanolic extract exhibited significantly (P < 0.05) the highest value of yield (6.8 6 0.24%), total phenol (286.0 6 4.61 mg gallic acid equivalents/g), flavonoid (109.8 6 2.68 mg quercetin equivalents/g) and condensed tannin content (35.6 6 1.03 mgcatechin equivalents/ g). Antimicrobial activity of 60% methanolic extract tested from disc diffusion and broth dilution methods was effective against various food spoilage and pathogenic bacteria studied.The same extract exhibited statistically highest reducing power and antioxidant capacity againstDPPHradical,metal ions, lipid peroxides and hydrogen peroxide radicals. The UV-visible spectroscopy showed absorption maxima at 205 and 260 nm and the presence of hydroxyl group (3,431 cm-1) and an aromatic ring (around 1,465, 1,505 and 1,624 cm-1) in Fourier Transform Infrared spectroscopy, suggested the presence of phenolic compounds in the extract.
Investigation Of Factors Influencing Trichloromethane Levels In Milk And Its Control.,
2012
Department of Chemistry, Cork Institute of Technology, Cork, Ireland.
Investigation Of Factors Influencing Trichloromethane Levels In Milk And Its Control., Siobhan Ryan
Theses
Trichloromethane (TCM) is an undesirable chemical residue that can develop in milk. While TCM levels in milk are not within ranges of public health concern, it is important that minimal levels are maintained in order to promote the marketing of Irish dairy products abroad. Germany has enacted strict regulations on TCM concentrations in foodstuffs with a recommended level of0.002 mg/kg and re-analyse those milks, subsequent to cause identification and provision of advice on reducing TCM levels in milk. Milk samples were analysed using Gas chromatography (GC) with electron capture detection. The GC method was adapted and a standard curve was …
Effect Of Different Rehydration Temperatures On The Moisture And Phytochemical Constituents Of Dried Edible Irish Brown Seaweed.,
2012
Technological University Dublin
Effect Of Different Rehydration Temperatures On The Moisture And Phytochemical Constituents Of Dried Edible Irish Brown Seaweed., Sabrina Cox, Shilpi Gupta, Nissreen Abu-Ghannam
Articles
The effect of temperature (20, 40, 60, 80 and 100 °C) on the rehydration kinetics and phytochemical constituents of dried edible Irish brown seaweed, Himanthalia elongata, were studied. The moisture content of fresh and dried seaweed was 4.07 and 0.07 g water/g dry basis, representing a 98.1% reduction in water content. All rehydration moisture curves had a clear exponential tendency, and it was observed that the rehydration time decreased when temperature was increased. Although restoration of the product to its original moisture content was achieved, rehydration resulted in losses in phytochemical content. Moisture equilibrium was achieved fastest at 100 °C …
Synthesis, Characterisation And Photo-Stability Of A Folate-Modified Β-Cyclodextrin As A Functional Food Additive.,
2012
Technological University Dublin
Synthesis, Characterisation And Photo-Stability Of A Folate-Modified Β-Cyclodextrin As A Functional Food Additive., Zlata Tofzikovskaya, Christine O'Connor, Mary Mcnamara
Articles
A novel two-step synthetic route was developed and gave the mono-substituted derivative 6-deoxy-6-[(1-(2-amino)ethylamino)folate]-b-cyclodextrin (CDEnFA) with high yield (60 %). Elemental analysis, mass spectrometry, 1H and 13C NMR, FTIR and Raman spectroscopies demonstrated the successful synthesis of the γ isomer only with no evidence of the presence of other isomers or free folic acid. Electronic absorption spectroscopy was used to study the photochemical properties of CDEnFA and showed that in both the solid state and aqueous solution CDEnFA is considerably more photo-stable than free folic acid.
The Impact Of Delactosed Whey Permeat Treatment On Shelf-Life And Antioxidant Contents Of Strawberries,
2012
Technological University Dublin
The Impact Of Delactosed Whey Permeat Treatment On Shelf-Life And Antioxidant Contents Of Strawberries, Catherine Barry-Ryan, Lubna Ahmed, Ana Belen Martin-Diana, Daniel. Rico
Articles
The aim of this study was to investigate the effect of delactosed whey permeate (DWP) 27 treatment on antioxidant and physico-chemical properties of strawberries. Fresh strawberries 28 treated with 3 % DWP were analyzed for different quality, nutritional and microbiological 29 markers during 10 days of storage at 5 °C. The results showed that DWP treatment 30 significantly reduced incidences of decay (70 %) and numbers of total aerobic counts (~1.4 31 Log10 CFU/g) and yeast and moulds (~1.8 Log10 CFU/g). DWP treatment also inhibited the 32 loss of firmness (15 %) and maintained significantly (p
Viability Of Lactic Acid Bacteria And Sensory Evaluation In Cinnamomum Verum And Allium Sativum-Bio-Yogurts Made From Camel And Cow Milk,
2011
University of Malaya
Viability Of Lactic Acid Bacteria And Sensory Evaluation In Cinnamomum Verum And Allium Sativum-Bio-Yogurts Made From Camel And Cow Milk, Ahmad Salihin Hj Baba, Shori A. B.
Ahmad Salihin Hj Baba
The present study investigate the effect of herbal water extract prepared from Allium sativum and Cinnamomum verum on the viability of lactic acid bacteria (Lactobacillus spp and Streptococcus thermophilus) in cow- and camel-milk yogurts during 21 day refrigerated storage. The organoleptic properties of fresh-yogurts were evaluated. Lactobacillus spp count for fresh cow milk-yogurts (0 day) in both present and absent of C. verum and A. sativum was ranged from 1.4×0 6 to 2.1×10 6 cfu/mL. These values were not significantly changed throughout the 21 days of refrigerated storage. Lactobacillusspp count in fresh plain camel milk- yogurt was 13.2×10 6 cfu/mL …
Potential Applications Of Hs-Spme/Gc In Oxidized Vegetable Oils.,
2011
Çanakkkale 18 March University
Potential Applications Of Hs-Spme/Gc In Oxidized Vegetable Oils., Gulgun Yildiz Ti̇ryaki̇
Dr. Gülgün YILDIZ TIRYAKI
Headspace solid phase microextraction chromatography (HS-SPME/GC) was evaluated as a tool in determining the rate of oxidation in oxidized soybean oil samples by measuring the production of hexanal as a secondary major volatile breakdown product of linoleic acid. Samples of the headspace taken from sealed 20 mL vials, incubated 30 min at 50 °C followed by 5 min adsorption, were injected into a gas chromatograph with 2 min thermal desorption. In applying SPME, different analytical conditions were evaluated. The linearity of response of the volatiles for the HS-SPME/GC procedure using a carboxen-polydimethylsiloxane fiber was determined from 3 g of mineral …
