scispace - formally typeset
Search or ask a question

Why does coffee outrank dates in the level of antioxidants? 

Extraction (chemistry)
Roasting
Antioxidant
DPPH
Ascorbic acid

Answers from top 11 papers

More filters
Papers (11)Insight
Journal Article•DOI
The inhibitory effects of coffee on radical-mediated oxidation and mutagenicity.
Richard H. Stadler, Robert J. Turesky, Olivier Müller, Jovanka Markovic, Phaik Mooi Leong-Morgenthaler 
16 Jul 1994-Mutation Research
97 Citations
Thus, coffee, like many antioxidants, exhibits dual effects in vitro which are highly dependent upon parameters such as dose, atmospheric oxygen, transition metals as well as the biological and chemical endpoints used for measurement.
Open access•Journal Article•DOI
Antioxidative polyphenolics obtained from spent coffee grounds by pressurized liquid extraction
Y.-F. Shang, Y.-F. Shang, J.-L. Xu, W.-J. Lee, Byung-Hun Um 
01 Mar 2017-South African Journal of Botany
66 Citations
Spent coffee grounds are produced in huge amount by cafeterias, restaurants and industries, which could be a good natural antioxidants resource.
Journal Article•DOI
Association between tea and coffee consumption and prevalence of metabolic syndrome in Poland - results from the WOBASZ II study (2013-2014).
Agnieszka Micek, Giuseppe Grosso, Maciej Polak, Krystyna Kozakiewicz, Andrzej Tykarski, Aleksandra Puch Walczak, Wojciech Drygas, Magdalena Kwaśniewska, Andrzej Pająk 
03 Apr 2018-International Journal of Food Sciences and Nutrition
32 Citations
Inverse association between coffee consumption and MetS may reflect the content of the antioxidants that offer cardiovascular protection.
Open access•Journal Article•DOI
Coffee in hypertensive women with asymptomatic peripheral arterial disease: a potential nutraceutical effect.
Anna Vittoria Mattioli, Mario Migaldi, Alberto Farinetti 
01 Apr 2018-Journal of Cardiovascular Medicine
19 Citations
Coffee contains polyphenol antioxidants, which have been hypothesized to act against free oxygen radicals and lipid peroxidation and to improve endothelial function.
Book Chapter•DOI
Antioxidants in Coffee
Draženka Komes, Arijana Bušić 
01 Jan 2014
22 Citations
Although phenolic antioxidants, naturally occurring in coffee, are degraded during the roasting process, the antioxidant properties of roasted coffee can be maintained, or even enhanced, by the formation of compounds with antioxidant activity, such as Maillard reaction products.
Journal Article•DOI
Genotoxicity of instant coffee: possible involvement of phenolic compounds.
Maria Paula Amaro de Castilho Duarte, António Laires, Jorge Gaspar, Daniela Leão, José Santos Oliveira, José Rueff 
07 Jun 1999-Mutation Research-genetic Toxicology and Environmental Mutagenesis
29 Citations
These results suggest that apart from other molecules present in instant coffee responsible for their genotoxicity in several short term assays, phenolic molecules could also be implicated in the genotoxicity of coffee, via reactive oxygen species arising from its auto-oxidation.
Open access•Journal Article•DOI
The antioxidant properties of dried extracts from the spent espresso coffee
D Milica Milutinovic, Slavica Šiler-Marinković, G Dusan Antonovic, R Katarina Mihajlovska, D Marija Pavlovic, I Suzana Dimitrijevic-Brankovic 
01 Jan 2013-Chemical Industry
Comparing the IC50 values of ascorbic acid and BHT with the IC50 values of tested extracts it can be concluded that waste coffee extracts could be a good source of natural antioxidants.
Open access•Journal Article•DOI
Effect of roasting degree on the antioxidant activity of different Arabica coffee quality classes.
Božana Odžaković, Natalija Džinić, Zoran Kukrić, Slavica Grujić 
01 Oct 2016
25 Citations
These results indicate that the antioxidant activity of coffee depends on a variety of bioactive components in coffee beans.
Journal Article•DOI
The increase in human plasma antioxidant capacity after acute coffee intake is not associated with endogenous non-enzymatic antioxidant components.
Nathália Moura-Nunes, Daniel Perrone, Adriana Farah, Carmen M. Donangelo 
21 Sep 2009-International Journal of Food Sciences and Nutrition
35 Citations
These results suggest that coffee components spare endogenous antioxidants or are themselves the main contributors to plasma AC increase after coffee intake.
Book Chapter•DOI
Nomenclature and general classification of antioxidant activity/capacity assays
Yong Sun, Cheng Yang, Rong Tsao 
15 Dec 2017
11 Citations
Abundant evidence suggests that antioxidants play a pivotal role in the
Open access•Journal Article•DOI
Extraction of coffee antioxidants: impact of brewing time and method
Iziar A. Ludwig, Lidia Sanchez, Bettina Caemmerer, Lothar W. Kroh, M. Paz De Peña, Concepción Cid 
01 Aug 2012-Food Research International
160 Citations
In conclusion, these technological factors should be considered to optimize coffee antioxidants extraction that can be used as ingredients for functional foods.

Related Questions

How do different states and processing methods of coffee beans affect the levels of bioactive compounds, including antioxidants?3 answersDifferent states and processing methods of coffee beans have a significant impact on the levels of bioactive compounds, including antioxidants. The content and composition of these compounds can be influenced by factors such as variety, processing, and storage conditions. For example, the cultivar of Arabica coffee beans (C. arabica) has lower phenolic compound content compared to Robusta (C. canephora) beans. Roasting plays a crucial role in improving the phenolic content and total antioxidant activity of coffee beans by liberating bound phenolic compounds and generating novel compounds with antioxidant activity. However, excessive roasting can decrease the number of bioactive compounds and stimulate the generation of anti-nutritional compounds, reducing the nutritional value of coffee. The moisture content during storage also affects the levels of bioactive compounds in coffee beans. Suitable roasting can enhance the bioavailability of these compounds, and their interaction with proteins can influence their bioactivity and nutritional value after consumption.
What are the antioxidant properties of banana?4 answersBananas have been found to possess antioxidant properties. The antioxidant capacity of banana inflorescences has been evaluated using various assays, such as total phenolic compounds, FRAP, and DPPH assays. Different types of Thai foods made from banana inflorescences, including fresh or side dishes, salads, soups and curries, deep-fried dishes, stir-fried dishes, and commercially processed products, have been shown to exhibit varying levels of antioxidant properties. Additionally, the antioxidant capacity of banana has been found to be higher when evaluated using an in vitro gastrointestinal digestion method, compared to conventional extraction methods. The high antioxidant content of bananas, including phenols and flavonoids, contributes to their potential health benefits, such as their antihyperglycemic properties and potential use in managing type-2 diabetes.
How does coffee outrank dates in antioxidant levels?4 answers
How does coffee outrank dates in the level of antioxidant?3 answers
Which green tea has most antioxidants?8 answers
Which tea has highest antioxidant?9 answers

See what other people are reading

RRL about Evaluation of sensory Acceptability of orange peel(citrus auntarium) as an Additive to Coconut Vinegar?
5 answers
The sensory acceptability of orange peel (Citrus aurantium) as an additive to coconut vinegar was evaluated in various studies. Research has shown that incorporating orange peel in food products like jam, vinegar, and functional shrikhand can enhance their sensory, physicochemical, and nutritional characteristics. Orange peel extracts obtained through subcritical water extraction have been found to be rich in bioactive compounds, making them a promising source for health-promoting ingredients in pharmaceutical and dietary products. Sensory analysis of products flavored with orange peel oils from different citrus varieties demonstrated high acceptability, with Eureka lemon peel oil consistently scoring the highest. Overall, these findings suggest that utilizing orange peel in coconut vinegar could potentially improve its sensory appeal and nutritional value.How to extract polysaccharide in shiitake?
5 answers
To extract polysaccharides from shiitake mushrooms, various methods can be employed. One approach involves using ultrasound-assisted extraction with water or natural deep eutectic solvent (NADES). Another method includes steps like freeze-drying, ultra-low-temperature cryogenic grinding, enzyme treatment, and deproteinization to obtain shiitake polysaccharide powder. Additionally, an extraction method includes freezing, crushing at ultralow temperature, microfiltration, ultrafiltration, and concentration steps to yield high-purity polysaccharides. Furthermore, a preparation method from shiitake mushroom stems involves freeze-drying, cryogenic grinding, enzyme extraction, deproteinization, column chromatography, and dialysis to obtain polysaccharide components. Lastly, a pilot-scale process combines water extraction, microfiltration, and reverse osmosis to obtain β-glucan-rich extracts suitable for functional foods. These diverse methods showcase different techniques for extracting polysaccharides from shiitake mushrooms.What essential oils can decrease glycine?
5 answers
Essential oils such as eucalyptus, thyme, and lemongrass oils have been shown to have significant effects on glycine levels. These essential oils were evaluated for their ability to control damping-off and root-rot diseases in soybean plants, resulting in improved growth parameters and seed yield. Additionally, essential oils have been studied for their anxiolytic effects, with aromas inducing metabolic changes that include alterations in neurotransmitters like glycine in the brain tissue of anxiety model rats. The use of essential oils in the green synthesis of graphene has also been explored, highlighting their potential as reducing agents in environmentally friendly methods, which could indirectly impact glycine levels due to their involvement in the reduction process.Can thiols be quantified in oxic soils?
5 answers
Thiols can be quantified in oxic soils, as they play a crucial role in various soil environments. While thiols are commonly quantified using liquid chromatography with fluorescence detection in various conditions, their concentrations in soils can vary significantly. Studies have shown that thiols like methanethiol and 3-mercaptopropionate can accumulate in anoxic sediments, indicating turnover processes in these environments. Additionally, methods have been developed to measure sulfur oxidation in soils, showcasing the oxidative capacity of soils to oxidize sulfur, which is negatively correlated with clay content and positively correlated with pH, organic carbon content, and sand content. These findings collectively suggest that thiols can indeed be quantified in oxic soils, with their concentrations and turnover rates influenced by various soil properties and environmental conditions.What is the current state of research on the effect of moringa leaf on diabetes?
5 answers
Current research indicates that moringa leaves show promise in managing diabetes. Studies have shown that moringa leaves contain compounds like flavonoids, vitamins, and alkaloids, which have significant effects on insulin levels, potentially preventing diabetes mellitus. Clinical trials in Algerian and Nigerian populations demonstrated that moringa leaf powder can reduce blood sugar levels, LDL cholesterol, and increase HDL cholesterol in diabetic patients without reported side effects. Additionally, research on mice suggests that a combined extract of moringa leaf and seed has strong antidiabetic, antioxidant, and antihyperlipidemic properties, normalizing blood glucose levels and improving various biochemical parameters. Further extensive trials are recommended to determine optimal dosages and long-term benefits of moringa in managing diabetes.How does changing nitrogen concentration affect chlorophyll concentration in leaves?
5 answers
Changing nitrogen concentration has a significant impact on chlorophyll concentration in leaves. Studies on different plant species like Mexican marigold, maize, and Fraxinus mandshurica have shown varying responses to nitrogen levels. For instance, in Mexican marigold, higher nitrogen doses led to increased chlorophyll concentrations. Similarly, in maize, chlorophyll content in leaves significantly increased with higher nitrogen levels, indicating a positive correlation. Fraxinus mandshurica seedlings also exhibited increased chlorophyll biosynthesis with higher nitrogen concentrations, particularly at 8 mmol·L -1. These findings collectively suggest that adequate nitrogen supply positively influences chlorophyll production in leaves, highlighting the importance of nitrogen management for optimizing plant photosynthetic efficiency and overall growth.What is Activation stage in seed germination?
5 answers
The activation stage in seed germination involves the initiation of crucial processes like starch and DNA synthesis, cell growth, and division in specific embryo zones. This stage can be enhanced through methods like pre-sowing seed treatment with silicon-containing preparations, leading to increased germination efficiency. Research on the prooxidant-antioxidant system (PAS) in seed tissues reveals changes in PAS indicators during the activation of seeds before germination, with differences observed between Magnoliopsida and Liliopsida plants. Activation tagging, a gene discovery tool, has been utilized to uncover genes involved in seed dormancy and germination, including those related to hormone signal transduction, highlighting its importance in studying the activation stage of seed germination. Understanding the reorganization of seed metabolism, energy production, and the role of free pools of metabolites is crucial in elucidating the activation stage of seed germination.Why vegetables is important?
5 answers
Vegetables play a crucial role in human health due to their rich nutrient content. They provide essential vitamins, minerals, dietary fiber, and bioactive compounds that contribute to overall well-being. Consuming a variety of vegetables is vital to ensure a diverse intake of phytochemicals, which offer protection against chronic diseases like diabetes, cancer, obesity, and cardiovascular diseases. The World Health Organization recommends a minimum daily intake of 400 g of fruits and vegetables to prevent noncommunicable diseases and address micronutrient deficiencies. Additionally, vegetables are known for their antioxidant properties, anti-inflammatory effects, and ability to regulate various biomarkers related to cardiovascular health. Therefore, incorporating vegetables into one's diet not only promotes physical health but also aids in disease prevention and overall well-being.Isoloation of active components with tlc of an herbarl tea
5 answers
The isolation of active components in herbal teas can be achieved through Thin Layer Chromatography (TLC) to develop fingerprint profiles for quality control. TLC is a valuable tool for identifying and separating phytoconstituents in herbal products, aiding in the isolation of bioactive compounds. For instance, TLC fingerprinting of Pax Herbal Malatreat Tea revealed five distinct components under UV light and four spots under visible light. Similarly, TLC analysis of Lithuanian herbal teas showed an increase in phenolic compounds with extraction time, indicating the potential for isolating active antioxidants. Additionally, the use of HPLC-TOF-MS and HPLC-IT-MS methods can identify chemical constituents in herbal teas, aiding in the isolation of active components for further analysis. Overall, TLC and advanced chromatographic techniques play a crucial role in isolating active components in herbal teas for quality control and medicinal purposes.Why antioxidant activity is incresing by incresing the convcentration of tznic oxidehe nanoparticles hrsc activity?
5 answers
The increase in antioxidant activity with the concentration of zinc oxide nanoparticles is attributed to their ability to scavenge free radicals effectively. Zinc oxide nanoparticles synthesized using Punica granatum and Elettaria cardamomum extracts exhibit significant antioxidant properties, even surpassing standard antioxidants like vitamin C. Additionally, nanomaterials like iron oxide nanoparticles and BSA templated MnO2 nanoparticles have shown antioxidant behavior through various mechanisms, such as quenching reactive oxygen species and mimicking antioxidant enzymes like superoxide dismutase and catalase. These nanoparticles possess redox activity, radical trapping capabilities, and peroxidase-like activities, contributing to their enhanced antioxidant effects. Therefore, the concentration-dependent increase in antioxidant activity of zinc oxide nanoparticles can be linked to their inherent ability to combat oxidative stress effectively, making them promising candidates for therapeutic applications.Docking studies with ic50 value with difference of 1000 value and 20 drugs
5 answers
Docking studies play a crucial role in understanding molecular interactions and drug development. In the context of IC50 values, which represent the concentration of a compound required for 50% inhibition, differences of 1000 value were observed in the studies. For instance, in the analysis of 24 derivatives of β-Amino alcohol grafted 1,4,5-trisubstituted 1,2,3-triazoles, compound 10 exhibited a stable docking score of -100.295KJmol−1 against p53 protein. Additionally, the QSAR models developed for leukotriene A4 hydrolase enzyme inhibitors showed a correlation coefficient (R(2)) of 0.87 between predicted and experimental IC50 values for 409 proposed structures. These findings highlight the significance of docking studies in predicting IC50 values and optimizing drug interactions for potential therapeutic compounds.