scholarly journals Determination of the polyphenol and antioxidant activity of different types and forms of millet

2017 ◽  
Vol 76 (OCE1) ◽  
Author(s):  
A. Almaski ◽  
S. Thondre ◽  
H. Lightowler ◽  
S. Coe
Keyword(s):  
Antioxidant Activity ◽  
Different Types

scholarly journals The Rhythmic Growth Pattern of Microbes is Antithetical to Antioxidant Activity of Kombucha: A New Finding in Food Biochemistry

2021 ◽  
pp. 1-7
Author(s):  
Soumya Majumder ◽  
Arindam Ghosh ◽  
Sourav Chakraborty ◽  
Malay Bhattacharya
Keyword(s):  
Antioxidant Activity ◽  
Growth Pattern ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Food Science ◽  
Different Types ◽  
New Finding ◽  
Free Radical Scavenging Assay ◽  
Rhythmic Growth

Background: Kombucha is a traditional, popular and probiotic health drink having strong antioxidant properties. Involvement of various bacteria and yeasts in kombucha fermentation have been previously described by several scientists. In this research, we aimed to determine the growth pattern of microbes involved in kombucha fermentation, using the orthodox turbidimetric method and a simultaneous determination of antioxidant activity regularly. Methods: This experiment was designed in a simple way to evaluate the interrelation between growth of microbes involved in kombucha fermentation and the rate of release of antioxidant molecules using spectrophotometric growth study and DPPH free radical scavenging assay. Results: In this research, some new characteristics of kombucha have been found regarding microbial fermentation. Moreover, we prepared broths using different types of sugars as carbon source for a comparative analysis. Significance: In all the broths, it was found that there is a negative correlation between rhythmic microbial growth pattern and antioxidant activity which is definitely a new finding in food science.

scholarly journals Antioxidant Acitivity in Various Processed Products of Inferior Local Tubers (Dioscorea sp. L.)

2017 ◽  
Vol 3 (5) ◽  
pp. 35
Author(s):  
Ari Yuniastuti ◽  
Retno Sri Iswari ◽  
R. Susanti
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Antioxidant Activities ◽  
Different Types ◽  
Processed Products ◽  
Wild Yam

<p>Inferior local tubers such as lesser yam, wild yam and arrowroot contain bioactive compounds such as phenols and diosgenin which act as antioxidants.  Antioxidant activities in the processed of local tubers have not been reported. The aim of this research was to identify the antioxidant activity of local tubers (inferior) that has been processed through the process of steaming, frying and milling to be flour. The determination of antioxidant activity was performed using α, α, Diphenyl Picryl Hydrazil (DPPH), which is indicated as a percentage of the apprehension of radical activities by the amount of absorbance at 680 nm. The antioxidant activity of lesser yam steamed, fried and milled were 2.26 %, 0.84 %, and 3.34 % respectively. The antioxidant activity of steamed, fried and milled arrowroot were 1.44 %, 0.65 %, and 1.32 % respectively. Moreover, the antioxidant activity of steamed, fried and milled wild yam were 1.08 %, 0.08 %, and 0.82 % respectively. The antioxidant activity of inferior local tubers have decreased in different types of processing. The highest antioxidant activity was in the milled tubers followed by steamed and fried tuber. </p>

scholarly journals Secondary Metabolites Identification and Antioxidant Activity Determination of Crude Extract of Barringtonia asiatica l. (kurz) Leaves

2021 ◽  
pp. 51-58
Author(s):  
Rega Permana ◽  
Aulia Andhikawati
Keyword(s):  
Antioxidant Activity ◽  
Methanol Extract ◽  
Geographic Region ◽  
Activity Profile ◽  
West Java ◽  
Inhibition Concentration ◽  
Ic50 Value ◽  
Different Types ◽  
Phytochemical Constituent

Aims: The aims of this study were to elucidate the pythochemical compounds from the leaf of mangrove (Barringtonia asiatica L. (Kurz) colleceted from the coast of Pangandaran Regency, West Java, Indonesia as well as its antioxidant activity profile. Study Design: The study was designed experimentally with two replication (duplo) for the extraction preparation and analyzed statistically using regression linear for the determination of Inhibition Concentration at 50% or IC50. Place and Duration of Study: Sample were collected from the mangrove ecotourism site at Pangandaran Regency, West Java, Indonesia. The experimental study was performed at the Tropical Marine and Fisheries Laboratory, Fisheries Department, PSDKU Padjadjaran University, Indonesia. Methodology: The identification of pythochemical contents of the leaf was carried out qualitatively with the principle of formation of precipitate, color and foam. The extraction was performed accordingly using three different types of solvent, n-hexane, ethyl acetate and methanol. Lastly, the antioxidant activity was tested using DPPH (1,-diphenyl-2-picrylhydrazyl) method and IC50 were analyzed subsequently. Results: Based on the results of the research that has been carried out, it can be concluded that the leaves of Barringtonia asiatica L. (Kurz) contain bioactive compounds in the form of tannins and saponins. The methanol extract of Barringtonia asiatica L. (Kurz)  was proven to have moderate strength antioxidant activity with IC50 value of 125.87 ppm. Conclusion: this results concluded that different geographic region can influence the phytochemical constituent of the of Barringtonia asiatica L. (Kurz). Furthermore, this doesn’t hindered its antioxidant activity potential as it still proven to have a relatively medium antioxidant activity.

Characterization of Different Types of Biomass Wastes Using Thermogravimetric and ICP-MS Analyses

2020 ◽  
Vol 70 (12) ◽  
pp. 4594-4600
Keyword(s):  
Thermogravimetric Analysis ◽  
Food Industry ◽  
Wood Waste ◽  
Biomass Ash ◽  
Minor Elements ◽  
Ms Analysis ◽  
Icp Ms ◽  
Different Types

The purpose of this study was to characterize some types of biomass wastes resulted from different activities such as: agriculture, forestry and food industry using thermogravimetric and ICP-MS analyses. Also, it was optimized an ICP-MS method for the determination of As, Cd and Pb from biomass ash samples. The ICP-MS analysis revealed that the highest concentration of metals (As, Cd, Pb) was recorded in the wood waste ash sample, also the thermogravimetric analysis indicated that the highest amount of ash was obtained for the same sample (26.82%). The biomass wastes mentioned in this study are alternative recyclable materials, reusable as pellets and briquettes. Keywords: ash, biomass, ICP-MS, minor elements, TG

Studies on the Behavior Some Paints in Electro-insulating Fluid Based on Vegetable Esters

2018 ◽  
Vol 69 (5) ◽  
pp. 1139-1144
Author(s):  
Iosif Lingvay ◽  
Adriana Mariana Bors ◽  
Livia Carmen Ungureanu ◽  
Valerica Stanoi ◽  
Traian Rus
Keyword(s):  
Structural Changes ◽  
Oxidation Processes ◽  
High Oleic ◽  
Painting Materials ◽  
Insulating Paper ◽  
Different Types ◽  
Mechanism And Kinetics ◽  
Kinetics Of ◽  
Natural Ester

For the purpose of using three different types of painting materials for the inner protection of the transformer vats, their behavior was studied under actual conditions of operation in the transformer (thermal stress in electro-insulating fluid based on the natural ester in contact with copper for electro-technical use and electro-insulating paper). By comparing determination of the content in furans products (HPLC technique) and gases formed (by gas-chromatography) in the electro-insulating fluid (natural ester with high oleic content) thermally aged at 130 �C to 1000 hours in closed glass vessels, it have been found that the presence the investigated painting materials lead to a change in the mechanism and kinetics of the thermo-oxidation processes. These changes are supported by oxygen dissolved in oil, what leads to decrease both to gases formation CO2, CO, H2, CH4, C2H4 and C2H6) and furans products (5-HMF, 2-FOL, 2 -FAL and 2-ACF). The painting materials investigated during the heat treatment applied did not suffer any remarkable structural changes affecting their functionality in the electro-insulating fluid based on vegetable esters.

scholarly journals The Importance of Diet in Predicting the Remission of Urticaria—Determination of Allergen-Specific IgE

Medicina ◽  
2021 ◽  
Vol 57 (7) ◽  
pp. 679
Author(s):  
Monica Iuliana Ungureanu ◽  
Liliana Sachelarie ◽  
Radu Ciorap ◽  
Bogdan Aurelian Stana ◽  
Irina Croitoru ◽  
...  
Keyword(s):  
Predictive Value ◽  
Allergic Diseases ◽  
Specific Ige ◽  
Egg White ◽  
Food Allergens ◽  
Pediatric Hospital ◽  
Disease Remission ◽  
Specific Serum ◽  
Different Types

Background and Objectives: Different types of food introduced gradually in the diet will expose children to different food allergens, increasing the chance of developing allergic diseases. The aim of our study was to determine if allergen-specific IgE values can influence, depending on the diet, the prediction of remission of urticaria in children. Materials and Methods: This prospective study was conducted in 132 patients diagnosed over two years with urticaria, admitted to “Sf. Maria” Clinical Pediatric Hospital Iaşi. Total IgE assay was performed by ELISA, and determination of specific serum IgE by the CLA System Quanti Scan method (Innogenetics, Heiden, Germany). Data were gathered and statistical analysis was performed using statistical software SPSS, using descriptive and inferential statistics. Results: The determination of specific IgE to food allergens was performed on a total of 132 cases. The values of specific IgE were positive for one or more food allergens in 84 patients (63.64%). The most common allergens involved were: cow’s milk in 33.3% cases, egg white in 22.6% cases, and hazelnuts in 11.9% cases. The specific IgE values for the different types of food included in our study had a predictive value for disease remission. Conclusions: The determination of specific IgE confirms the presence of a particular food allergen and may have predictive value for the future development of an allergic manifestation.

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