Influence of different processing and storage conditions on in vitro bioaccessibility of polyphenols in black carrot jams and marmalades

2015 ◽  
Vol 186 ◽  
pp. 74-82 ◽  
Author(s):  
Senem Kamiloglu ◽  
Ayca Ayfer Pasli ◽  
Beraat Ozcelik ◽  
John Van Camp ◽  
Esra Capanoglu
Keyword(s):  
Storage Conditions ◽  
Black Carrot ◽  
In Vitro Bioaccessibility ◽  
Processing And Storage ◽  
And Storage

scholarly journals Antioxidant capacity and lipid stability egg during processing and storage.

2014 ◽  
Vol 4 (1) ◽  
pp. 19
Author(s):  
Michelle Garcêz Carvalho ◽  
Alfredo Tenuta Filho
Keyword(s):  
Oxidative Stability ◽  
Antioxidant Capacity ◽  
Lipid Fraction ◽  
Thiobarbituric Acid ◽  
Storage Conditions ◽  
Limit Of Quantification ◽  
Total Antioxidant ◽  
Processing And Storage ◽  
And Storage

<p>Different processing conditions, packaging and storage can affect the natural antioxidant protection of the egg. Thus, the objectives were: (a) To standardize a methodology able to evaluate in vitro antioxidant capacity of fresh and processed egg, (b) investigate the effect of pasteurization and spray on the oxidative stability of the lipid fraction of egg and (c) evaluate the antioxidant capacity and oxidative stability of fatty acids from whole egg pasteurized atomized, bottle of high density polyethylene, opaque, under nitrogen, at 5&plusmn;2&ordm;C for up to 90 days. The phosphomolybdenum method to measure the total antioxidant capacity of lipid fraction (CATL) Egg presented analytical adequacy, with a limit of quantification of 0.017 mg &alpha;-tocoferol/mL. The CATL decreased with the progress of processing and the reverse was observed for the lipids, 7-CETO (7-ketocholesterol) and TBARS (thiobarbituric acid reactive substances). The pasteurized egg atomized (OIPA) kept under ideal storage conditions considered stable in relation to hydration, CATL and TBARS. It is concluded that the method of phosphomolybdenum suitability presented analytical sufficient. Pasteurization did not affect any of the parameters evaluated, but the atomization caused significant decrease CATL, and elevated lipids, TBARS and 7-CETO. Was maintained hydration and stability of the lipid OIPA stored for 90 days at 5&deg;C, indicating that the conditions for packaging and storage were effective.&nbsp;</p><p>&nbsp;</p><p>DOI:&nbsp;<a href="http://dx.doi.org/10.14685/rebrapa.v4i1.102">http://dx.doi.org/<span>10.14685/rebrapa.v4i1.</span><span>102</span></a></p><p><span><br /></span></p>

scholarly journals Determination of the Chemical Composition of Tea by Chromatographic Methods: A Review

2015 ◽  
Vol 4 (3) ◽  
pp. 56 ◽  
Author(s):  
Alexandr Ya Yashin ◽  
Boris V. Nemzer ◽  
Emilie Combet ◽  
Yakov I. Yashin
Keyword(s):  
Chemical Composition ◽  
Volatile Compounds ◽  
Black Tea ◽  
Storage Conditions ◽  
Organoleptic Evaluation ◽  
Chromatographic Methods ◽  
Tea Quality ◽  
Processing And Storage ◽  
And Storage

<p>Despite the fact that mankind has been drinking tea for more than 5000 years, its chemical composition has been studied only in recent decades. These studies are primarily carried out using chromatographic methods. This review summarizes the latest information regarding the chemical composition of different tea grades by different chromatographic methods, which has not previously been reviewed in the same scope. Over the last 40 years, the qualitative and quantitative analyses of high volatile compounds were determined by GC and GC/MS. The main components responsible for aroma of green and black tea were revealed, and the low volatile compounds basically were determined by HPLC and LC/MS methods. Most studies focusing on the determination of catechins and caffeine in various teas (green, oolong, black and pu-erh) involved HPLC analysis.</p> <p>Knowledge of tea chemical composition helps in assessing its quality on the one hand, and helps to monitor and manage its growing, processing, and storage conditions on the other. In particular, this knowledge has enabled to establish the relationships between the chemical composition of tea and its properties by identifying the tea constituents which determine its aroma and taste. Therefore, assessment of tea quality does not only rely on subjective organoleptic evaluation, but also on objective physical and chemical methods, with extra determination of tea components most beneficial to human health. With this knowledge, the nutritional value of tea may be increased, and tea quality improved by providing via optimization of the growing, processing, and storage conditions.</p>

scholarly journals Botanicals to Control Soft Rot Bacteria of Potato

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
M. M. Rahman ◽  
A. A. Khan ◽  
M. E. Ali ◽  
I. H. Mian ◽  
A. M. Akanda ◽  
...  
Keyword(s):  
Plant Extracts ◽  
Curcuma Longa ◽  
Soft Rot ◽  
Storage Condition ◽  
Storage Conditions ◽  
Leaf Extracts ◽  
Corchorus Capsularis ◽  
Rot Disease ◽  
And Storage

Extracts from eleven different plant species such as jute (Corchorus capsularisL.), cheerota (Swertia chiraitaHam.), chatim (Alstonia scholarisL.), mander (Erythrina variegata), bael (Aegle marmelosL.), marigold (Tagetes erecta), onion (Allium cepa), garlic (Allium sativumL.), neem (Azadiracta indica), lime (Citrus aurantifolia), and turmeric (Curcuma longaL.) were tested for antibacterial activity against potato soft rot bacteria,E. carotovorasubsp.carotovora (Ecc)P-138, underin vitroand storage conditions. Previously,EccP-138 was identified as the most aggressive soft rot bacterium in Bangladeshi potatoes. Of the 11 different plant extracts, only extracts from dried jute leaves and cheerota significantly inhibited growth ofEccP-138in vitro. Finally, both plant extracts were tested to control the soft rot disease of potato tuber under storage conditions. In a 22-week storage condition, the treated potatoes were significantly more protected against the soft rot infection than those of untreated samples in terms of infection rate and weight loss. The jute leaf extracts showed more pronounced inhibitory effects onEcc-138 growth both inin vitroand storage experiments.

scholarly journals Growth kinetics of Salmonella Typhimurium and Listeria monocytogenes in buffalo milk under different processing and storage conditions

2021 ◽  
Vol 51 (11) ◽  
Author(s):  
Joelson Sousa Lima ◽  
Ana Paula Presley Oliveira Sampaio ◽  
Mylla Christy da Silva Dufossé ◽  
Paula Fernanda Morais de Sousa ◽  
Josyane Brasil da Silva ◽  
...  
Keyword(s):  
Listeria Monocytogenes ◽  
Salmonella Typhimurium ◽  
Growth Kinetics ◽  
Storage Conditions ◽  
Buffalo Milk ◽  
Production Chain ◽  
Pasteurized Milk ◽  
Processing And Storage ◽  
And Storage ◽  
Kinetics Of

ABSTRACT: Buffalo milk is rich in nutrients and can serve as a substrate for the proliferation of microorganisms. Thus, the objective of the present study was to evaluate the growth kinetics of Salmonella Typhimurium and Listeria monocytogenes in buffalo milk under different processing and storage conditions. Samples of raw and pasteurized milk were inoculated with 1 CFU of each bacterium, separately and together, per 25 mL. After contamination, samples were stored at 8 °C or 37 °C, and bacterial counts were performed at 24, 48, and 168 h. In addition, the accompanying microbiota growth, pH, and the effect of these variables on the growth kinetics of microorganisms were monitored. The pathogens tested were able to proliferate under most conditions tested, reaching high titers throughout the experimental period. At 37 °C, there was a decrease in pH and an increase in the accompanying microbiota that interfered with the microbial growth curve. It was also observed that pasteurized milk subjected to 8 °C provided better conditions for the multiplication of bacteria. Therefore, it was concluded that care throughout the production chain, storage, and commercialization of milk must be adopted to guarantee the microbiological safety of this food.

scholarly journals FATTY ACID PROFILE OF NON-CONFORMING POOLED HUMAN MILK AS AFFECTED BY THE PROCESSING AND STORAGE CONDITIONS

2021 ◽  
Vol 9 (2) ◽  
pp. 46-54
Author(s):  
Otávio A. S. Ribeiro ◽  
Kely P. Correa ◽  
Mauricio O. Leite ◽  
Marcio A. Martins ◽  
Jane S. R. Coimbra
Keyword(s):  
Fatty Acid ◽  
Human Milk ◽  
Fatty Acid Profile ◽  
Storage Period ◽  
Storage Conditions ◽  
Milk Lipid ◽  
Fatty Acid Profiles ◽  
Operational Conditions ◽  
Processing And Storage ◽  
And Storage

The fatty acid's contents of non-conform pooled human milk can be affected by different processing and storage operational conditions. Besides, the knowledge of changes in the human milk fatty acid profile can help indicate its use in a given storage period, according to each newborn's specific need. Thus, in the present work, changes in the fatty acid profiles of three types of human milk (raw; pasteurized at 62.5 °C for 30 min; homogenized at 40 oC for 30 s followed by pasteurization) were studied during storage for six months in a freezer at -18 oC. Large variations were observed in the concentrations of polyunsaturated fatty acids, particularly of docosahexaenoic acid, with a reduction of almost 50% of its total. Palmitic and stearic acid contents also changed according to the conditions of processing and storage. Correlations between the decrease of long fatty acid chains and the increase of medium and short chains were verified.  Thus, we observe that operational conditions of processing and storing change human milk lipid profile, with some nutritional losses.

scholarly journals An Investigation of Moroccan Vinegars: Their Physicochemical Properties and Antioxidant and Antibacterial Activities

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Driss Ousaaid ◽  
Hamada Imtara ◽  
Hassan Laaroussi ◽  
Badiaa Lyoussi ◽  
Ilham Elarabi
Keyword(s):  
Physicochemical Properties ◽  
Bioactive Compounds ◽  
Antibacterial Activities ◽  
Storage Conditions ◽  
Production Methods ◽  
Maximum Value ◽  
Processing And Storage ◽  
And Storage ◽  
Excellent Source

Vinegar is a natural product rich in bioactive compounds such as phenols, flavonoids, and organic acids. Several factors affect the quality of vinegars such as apple origin, environmental conditions, production methods, processing, and storage conditions. We investigated the quality of apple vinegars as well as their physicochemical properties and the antioxidant and antibacterial activities of vinegars collected from different areas in Morocco. For physicochemical properties, the outcomes showed the following values: pH (3.18–3.83), electrical conductivity (2.11–2.90), acidity (0.24–5.6), Brix (3.25–6), and density (1.0123–1.0233). The polyphenols content of samples was 68.91 mg AG/100 mL in sample S6 as the minimum value and 147.54 mg AG/100 mL in sample S2 as the maximum value. The best ability to scavenge the DPPH radical was observed in sample S3 (IC50 = 0.45 ± 0.013 µL/mL). Sample S2 showed moderate antibacterial effect against microorganisms tested with MICs ranging from 0.78 µL/mL to 1.125 µL/mL and with a diameter of inhibition ranging from 15.65 mm to 27.65 mm. In addition, a strong correlation was observed between the antibacterial activity of vinegars and physicochemical parameters (pH and total acidity). These outcomes have shown that our vinegar samples are an excellent source of bioactive compounds with potent antioxidant and antibacterial potentials.

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