Cup Of Coffee Research Articles

Risk assessment of aluminum, chromium and nickel exposure through ingestion of Arabica and Robusta coffee infusions prepared in aluminum and steel moka pots

The study investigates Al, Cr and Ni contents in coffee beans and infusions. The aim was to show the effect of the material from which the moka pot is made on the quality of infusions and assessing the risk connected with increased consumption of these metals based on hazard quotients calculation. Arabica and Robusta coffee samples of different origin (America, Africa, Asia) and type of processing were tested. The highest concentrations of Cr and Ni were obtained using a steel moka pot, 9.8µgL-1 and 66.8µgL-1, respectively. Drinking 3 cups of coffee per day brewed in this pot, the consumer will be exposed to a daily dose of 4.75·10-5 and 3.23·10-4mgkg-1 day-1 of Cr and Ni, respectively. On the other hand, brewing coffee in an aluminum moka pot results in a concentration of Al up to above 1mgL-1, therefore the migration of this element is significantly higher than that of Cr and Ni. Such a concentration will result in a daily dose of 5.36·10-3mgkg-1 day-1. However, the increased concentration of heavy metals due to the use of an aluminum or steel moka pot does not result in exceeding the maximum permissible dose.

A bitter cup of coffee? Assessing the impact of climate change on Arabica coffee production in Brazil

Brazil, the world's largest producer and exporter of Arabica coffee, faces increasing challenges from climate changes. To maintain the sustainability of this commodity, innovative management techniques will be essential. This study aimed to assess the impact of climate projections, considering two CMIP6 emission scenarios (SSP2–4.5 and SSP5–8.5) on the phenology and yield of Arabica coffee in 36 representative locations across Brazil for the periods 2041–2060, 2061–2080, and 2081–2100. Observed meteorological data from the BR-DWGD (Brazilian Daily Weather Gridded Data) and projected data from CLIMBra (Climate Change Dataset for Brazil) were employed. An agrometeorological model, calibrated for Brazilian conditions, estimated yield and phenology. Results indicate significant impacts on coffee cultivation areas, mainly due to rising temperatures and increased water deficits. Projections also suggest changes in coffee phenology, with anthesis advancing in colder regions and delaying in warmer areas, while maturation timing occurring earlier in all climates. Yield increases from CO₂ fertilization were more pronounced in category C climates (Cfa, Cfb, Cwa, and Cwb), particularly in Cwb climates, reaching 2.9 bags ha−1 (3.7 bags ha−1 with irrigation) under the SSP2–4.5 scenario and 2.5 bags ha−1 (3.5 bags ha−1 with irrigation) under SSP5–8.5. However, higher temperatures and water deficits could cause severe yield losses, especially in Aw climates and under high-emission scenarios, where losses may reach 100 %. Irrigation will play an important role in mitigating yield losses, especially in northern regions such as northern Minas Gerais and Bahia, where yields could exceed 30 bags ha−1. While southern Minas Gerais, São Paulo, and northern Paraná are projected to have the highest yields, these regions also face greater uncertainty and variability. This study underscores the need for adaptive agricultural practices, the development of resilient coffee cultivars, and supportive research policies to ensure the sustainability of coffee farming in the face of climate change.

A study on the ability of some fungi isolated from oil soil contaminated to biodegradation plastic and paper waste in Kirkuk city

This study was carried out in department of life science at the University of Kirkuk, College of Education for Pure Science laboratories to determine the capability of some types of fungi isolated from oil soil contaminated samples taken from different areas of Kirkuk city and to evaluate the biodegradation effect of plastics and papers wastes. The results showed that after taking 50 oil soil samples, the following fungi were isolated: The molds found were Aspergillus spp, Penicillum spp and Alternaria spp. Their impact on seven categories of waste was assessed as the weight was determined for each piece. The overall effect from the project was the reduction on the weight, Among the fungi, Alternaria spp outperformed Aspergillus spp, Penicillum spp and the wastes that lost the most weight after the fungi grew on them were cardboard, coffee cup, and drawing paper.

Effects of Caffeine Consumption on Exam Performance Throughout University Students

Background: caffeine can be found in many types of food and beverages such as coffee beans, chocolates, and tea. Caffeine consumption could be used for different reasons. For example, healthcare providers use caffeine to reduce fatigue and cope with demanding workloads. The aim of this study is to estimate the effect of caffeine consumption on exam performance among universities students. Methodology: The study used a cross-sectional design. Students at The Hashemite University in Zarqa-Jordan from both sexes were eligible to participate by completing an electronic questionnaire. Results: A total of 145 participants participated in the study, 113 (80.7%) participants reported a usual drinking of 1-2 coffee cups per day. Most of participants (48.6%) reported that the usually sleep >7 hours when they do not drink coffee. While most of participants (40%) reported 5-7 hours of sleep when they drink coffee. Conclusion: We concluded that caffeine intake decreases the amount of sleeping hours by 2 or more hours during night for students and this effect on their concentration, but on the other hand the student’s feels more energy after drinking caffeine and this helps them to feel more awake.

Radiation in the coffee cup

Abstract It is commonly assumed that radiative heat transfer only plays a relevant role in situations involving temperatures of several hundred degrees Celsius and above. Other common misconceptions relate to the cooling of metallic vs non-metallic objects, and the effect of their colour. A series of alternative demonstrations that counteract these beliefs and show the role played by radiation in the cooling of common tableware containing hot liquids are described here. The experiments require basic equipment, easily available even at home. The cooling curves obtained can be modelled with Newton´s law of cooling and the corresponding heat transfer coefficients estimated. The results elucidate the influence of surface emissivity on radiative heat transfer, and that this mechanism has a non-minor share on cooling processes even at temperatures below the normal boiling point of water. A final demonstration concerns heating of the same systems and corroborates the previous conclusions.

Effects of Active Compounds and Their Metabolites Associated with Coffee Consumption on Neurodegenerative Diseases.

Coffee is one of the most known and consumed beverages worldwide. Only three species are used in commercial coffee production, i.e., Coffea arabica L. (Arabica coffee), Coffea canephora Pierre ex A. Froehner (Robusta coffee), and Coffea liberica Hiern (Excelsa coffee). The world population consumes approximately two billion cups of coffee per day, making it an important commercial resource of bioactive compounds in world markets. High interest in coffee consumption described in the literature is not only due to its organoleptic properties (for example desirable bitterness, amount of flavours, and aromas) but also for its ability to stimulate the central nervous system.It is now known that there are more than 1000 compounds in coffee beverages, several of which have a bioactive activity. Recent studies show that consuming three to four cups of coffee per day, i.e. moderate consumption according to the European Food Safety Authority, may be beneficial for health.The main objective of the proposed review is to provide a comprehensive overview of bioactive compounds in coffee and other caffeine-containing beverages and their effects on neurodegenerative proteinopathies.

Changes in the total phenolic contents, chlorogenic acid, and caffeine of coffee cups regarding different brewing methods

Coffee is among the most popular beverages consumed worldwide due to its taste, flavor, and alertness effects on drinkers. Besides, caffeine and chlorogenic acid are known as featured compounds of coffee, and there are various phenolic compounds, that demonstrate many benefits for human health. However, the concentrations of those compounds ingested into the human body are greatly dependent on how coffee infusions are prepared. The extraction efficiency of phenolic compounds, caffeine, and chlorogenic acid in the Arabica and Robusta coffee obtained from the light, medium, and dark roasting levels, using the hot brew (at 50°C and 90°C) and cold brew methods was studied. The total phenolic contents (TPCs) were measured by the Folin-Ciocalteu assay, while the first -order derivative spectrophotometry was used to determine the caffeine and chlorogenic acid. Generally, light-roasted Robusta had the highest caffeine (2.10±0.017% w/w), chlorogenic acid (5.63±0.011% w/w), and TPCs (45.5±0.9 mg GAE/g). For brewing experiments, 10 g of coffee was brewed (100 mL of water) for different extraction times. The results show that hot brewing at 90°C was the most efficient method for extracting the TPCs and chlorogenic acid, while cold brewing was better for extracting caffeine. Extraction efficiency increased with longer extraction times, especially for the light roasting level.

Caffeine: A Multifunctional Efficacious Molecule with Diverse Health Implications and Emerging Delivery Systems.

Natural caffeine is found in many plants, including coffee beans, cacao beans, and tea leaves. Around the world, many beverages, including coffee, tea, energy drinks, and some soft drinks, have this natural caffeine compound. This paper reviewed the results of meta-studies on caffeine's effects on chronic diseases. Of importance, many meta-studies have shown that regularly drinking caffeine or caffeinated coffee significantly reduces the risk of developing Alzheimer's disease, epilepsy, and Parkinson's disease. Based on the health supplements of caffeine, this review summarizes various aspects related to the application of caffeine, including its pharmacokinetics, and various functional health benefits of caffeine, such as its effects on the central nervous system. The importance of caffeine and its use in alleviating or treating cancer, diabetes, eye diseases, autoimmune diseases, and cardiovascular diseases is also discussed. Overall, consuming caffeine daily in drinks containing antioxidant and neuroprotective properties, such as coffee, prevents progressive neurodegenerative diseases, such as Alzheimer's and Parkinson's. Furthermore, to effectively deliver caffeine to the body, recently developed nanoformulations using caffeine, for instance, nanoparticles, liposomes, etc., are summarized along with regulatory and safety considerations for caffeine. The U.S. Department of Agriculture (USDA) and the Food and Drug Administration (FDA) recommended that healthy adults consume up to 400 mg of caffeine per day or 5~6 mg/kg body weight. Since a cup of coffee contains, on average, 100 to 150 mg of coffee, 1 to 3 cups of coffee may help prevent chronic diseases. Furthermore, this review summarizes various interesting and important areas of research on caffeine and its applications related to human health.

Cafestol and kahweol content in different specialty coffee brews: Exploration by NMR analysis and evaluation of brewing parameters

Cafestol and kahweol, two coffee diterpenes known for their health effects, were quantified in cups of Kenya specialty coffee prepared using eight different brewing methods: AeroPress, Chemex, Clever, V60, Moka, Ibrik, Pure Brew, and French press. High-resolution Nuclear Magnetic Resonance (NMR) spectroscopy was employed for this analysis, involving a straightforward sample preparation procedure with only an extraction step for lipid compounds. Statistical tools were utilized to examine the correlation between diterpene concentrations and each extraction feature, with a focus on the impact of brewing parameters. The results indicate that unfiltered brewing methods produce coffee with high concentrations of diterpenes, whereas paper-filtered methods result in significantly lower concentrations. The findings suggest that these compounds are present in the coffee cup as part of the suspended solids, and that filtration, pressurization, and coffee powder particle size are crucial parameters influencing their concentration.

An umbrella review of meta-analysis to understand the effect of coffee consumption and the relationship between stroke, cardiovascular heart disease, and dementia among its global users

ABSTRACT Coffee has long been popular worldwide. The rise in lifestyle-related diseases such as cardiovascular disease, diabetes, stroke, dementia, and others has motivated coffee usage and illness prevalence studies. Some studies show coffee consumers are at risk for such diseases, whereas others show its active components protect them. Policymakers and the public need a comprehensive umbrella review to make healthy choices and enjoy coffee. Coffee consumption and stroke, CHD, and dementia outcomes have been distinguished using the PICO search strategy in PubMed with a filter for meta-analysis. We included 10 years of investigations until October 2023. MeSH terms “coffee intake,” “stroke, dementia,” and “transient ischemic attack,” comparing stroke risk with coffee consumption were used. The study excluded case reports and non-human, non-English observational research. The stroke risk of coffee was examined using RevMan software. Coffee consumption’s stroke risk ratio (RR), 95% CI, and I2 were estimated. Forest plots with P values ≤ 0.05 are significant. The umbrella review includes 11 meta-analyses from 457052 papers, totalling 11.96 million individuals. Drinking up to 4 cups of coffee daily reduced stroke risk by 12% compared with not drinking any coffee (0.88 (CI of 0.84-0.92, I2 of 13%, P < 0.00001)). Coffee drinkers had a 1.19 risk ratio for cardiovascular diseases compared to non-coffee drinkers (CI: 0.99–1.38, I2 = 84%, P < 0.00001). The dementia risk ratio for caffeine users was 0.90 (95% CI: 0.82-0.97, I2 = 46%, P < 0.00001) compared with non-consumers. Our analysis covering 5.42 million individuals found that 4 cups of coffee consumed a day reduced stroke risk by 12%. Coffee may reduce ischemic and haemorrhagic strokes by preserving endothelium and antioxidants. Coffee may lessen dementia risk, according to our study’s 0.94 pooled risk ratio after sensitivity analysis. Heavy coffee drinkers had a greater CHD risk, as per our findings. Heavy coffee drinkers were more at risk.

South Africa’s crowded cannabis market: identifying new market opportunities for Ilco Farming’s “green gold”

Learning outcomes Following a discussion of the case, students should be able to analyse competitive dynamics: provide an in-depth critical analysis of Ilco Farming’s microenvironment, using the structure–conduct–performance framework; evaluate strategic positioning: conduct a SWOT analysis of Ilco Farming’s medicinal cannabis business; and develop strategic approaches: propose actionable strategies that would provide effective solutions to the problem of constrained market conditions currently faced by Ilco Farming. Case overview/synopsis Coenie and Ilse Venter established Ilco Farming, a cannabis farm located in the Viljoenskroon district in the Free State province in South Africa, in 2021. From the beginning, they poured their hearts and souls into their new venture, which soon paid off. A few short months after Ilco Farming began operating, despite the presence of other large competitors, Ilco Farming supplied a large share of the domestic medicinal market with flower heads. But then an unexpected challenge presented itself. In March 2023, Ilco Farming was operating at only 23% (600 m2) of its production capacity of 2600 m2 and had considerable room for growth, the local market – at least the local legal market – for cannabis began to show signs of saturation. Coenie and Ilsa found themselves at the proverbial crossroads, grappling with the crucial decision of how to secure their farm’s future in the face of a fast-saturating local (legal) cannabis market and a thriving (illegal) black market. Coenie and Ilse refused to entertain the idea of going the black market route, as they were unwilling to risk losing their operating licence. They calculated that the farm would reach breakeven point within the next two years, with profits unlikely during this period. Should they persist with their current strategy of producing high-quality products and delivering a superior service in the hopes of growing their market share? Or should they consider other strategic options? Coenie and Ilse were sitting at their boardroom table having a cup of coffee and looking out of the window at Ilco Farming’s impressive SAHPRA- and GAP-approved warehouse and tunnels. “What should we do?” they both wondered. Complexity academic level The case study can be used in postgraduate courses in microeconomics (PGDIP/MBA) and agricultural economics (PGDIP/MBA). Supplementary materials Teaching notes are available for educators only. Subject code CSS 5: International business.

Modification of the association between coffee consumption and constipation by alcohol drinking: A cross-sectional analysis of NHANES 2007-2010.

The association between coffee consumption and constipation remains unclear. This study aimed to examine the relationship of coffee consumption with the risk of constipation, while also investigating potential effect modifiers. This cross-sectional study included 7844 participants from the National Health and Nutrition Examination Survey (NHANES) 2007-2010. Coffee consumption was extracted from the 24-hour dietary recall. Constipation was assessed using the Bristol Stool Form Scale. The association between coffee consumption and constipation was assessed using multivariable restricted cubic spline and logistic regression with odds ratio (OR) and 95% confidence interval (CI). There was a J-shaped relationship between total coffee consumption and the risk of constipation in the whole population (p for nonlinearity = 0.049), with 1-2 cups/day of total coffee potentially reducing the risk of constipation by 39% (OR 0.61, 95% CI 0.35-1.06, p = 0.07). As for caffeinated coffee, a J-shaped association between its consumption and the risk of constipation was also observed in the whole population (p for nonlinearity = 0.008), with 1-2 cups/day being significantly associated with a reduced risk (OR 0.57, 95% CI 0.35-0.95, p = 0.03). When restricting to never drinkers of alcohol, the associations between total and caffeinated coffee consumption and constipation shifted to inverse linear trends, where at least 3 cups/day was significantly associated with an 88% reduction in constipation risk (total coffee: OR 0.12, 95% CI 0.02-0.68, p = 0.02; caffeinated coffee: OR 0.12, 95% CI 0.02-0.70, p = 0.02). Decaffeinated coffee showed no association with constipation. Consuming 1-2 cups of caffeinated coffee daily was associated with a reduced risk of constipation in the general population. Among never drinkers of alcohol, a linear protective effect was observed, with a notable 88% reduction in constipation risk for those consuming at least 3 cups per day. Moderate caffeinated coffee intake may therefore be a viable dietary strategy for managing constipation in the general population.

From the Editor

So Labor Day is past, and we have begun a new year—new school year, that is, and therefore a time of celebration. Not just as parents whose children are headed back to school, but also the appreciation we get to feel as the summer’s heat subsides and we start looking forward to crisp evenings, steaming cups of coffee, and warm conversation with friends.

So Much Depends Upon a Cup of Coffee: A Reader Response Analysis of Eliot’s “Sweeney among the Nightingales”

T.S. Eliot’s poem “Sweeney among the Nightingales” is a short dramatic monologue that introduces Sweeney as rude and cruel character, in a setting where he interacts with several women referred to as ‘Nightingales’ in a brothel. Sweeney finds himself involved in a cunning plot in that brothel. He is seduced and given alcohol to impair his judgement. To thwart the conspiracy against him, he has to have a cup of coffee to help him remain awake. By having one of the women drop the cup of coffee, Eliot paves the way for unconventional reading of the text that focuses on the unmentioned spilled coffee in the poem. The unmentioned spilled coffee becomes more important than the cup of coffee dropped by the woman in the Spanish cape. For the absence of coffee at the end of Sweeney’s late night activities deters his sobriety; helps the conspirators to attain their goal, and further contributes to the theme(s) of the poem.

Phenome-Wide Analysis of Coffee Intake on Health over 20 Years of Follow-Up Among Adults in Hong Kong Osteoporosis Study

Background/Objectives: There has been limited evidence on the long-term impacts of coffee intake on health. We aimed to investigate the association between coffee intake and the incidence of diseases and mortality risk over 20 years among community-dwelling Chinese adults. Methods: Participants were from the Hong Kong Osteoporosis Study who attended baseline assessments during 1995–2010. Coffee intake was self-reported through a food frequency questionnaire and was previously validated. Disease diagnoses, which were mapped into 1795 distinct phecodes, and mortality data were obtained from linkage with territory-wide electronic health records. Cox models were used to estimate the association between coffee intake and the incidence of each disease outcome and mortality among individuals without a history of the respective medical condition at baseline. All models were adjusted for age, sex, body mass index, smoking, alcohol drinking, and education. Results: Among the 7420 included participants (mean age 53.2 years, 72.2% women), 54.0% were non-coffee drinkers, and only 2.7% consumed more than one cup of coffee per day. Over a median follow-up of 20.0 years, any coffee intake was associated with a reduced risk of dementia, atrial fibrillation, painful respirations, infections, atopic dermatitis, and dizziness at a false discovery rate (FDR) of <0.05. Furthermore, any coffee intake was associated with an 18% reduced risk of all-cause mortality (95% confidence interval = 0.73–0.93). Conclusion: In a population with relatively low coffee consumption, any coffee intake is linked to a lower risk of several neurological, circulatory, and respiratory diseases and symptoms, as well as mortality.

Association between coffee consumption and metabolic syndrome: A cross-sectional and Mendelian randomization study.

This study investigates the associations between coffee consumption and metabolic syndrome and its components, as well as the effect of milk, sugar, and artificial sweeteners on these associations. A cross-sectional analysis was conducted with 351805 UK Biobank participants. Coffee consumption data were collected via food frequency questionnaires and 24-h recall. Metabolic syndrome was identified through blood biochemistry and self-reported medication use. Odds ratios were calculated using multivariable logistic regression, and results were verified with two-sample Mendelian randomization. Consuming up to two cups of coffee per day was inversely associated with metabolic syndrome (1 cup/day: odds ratio [OR]: 0.88, 95% confidence interval [CI]: 0.85-0.92; 2 cups/day: OR: 0.90, 95% CI: 0.86-0.93). Higher intakes showed near-null associations. Mendelian randomization did not support a causal link between coffee intake and metabolic syndrome. Both self-reported and genetically predicted high coffee consumption (four cups per day or more) were associated with central obesity. The inverse association between coffee consumption and metabolic syndrome was more profound among drinkers of ground coffee than those of instant coffee. Results were similar when stratified by the use of milk and sugar, yet the use of artificial sweetener with coffee was positively associated with metabolic syndrome and all component conditions. Coffee consumption may increase the risk of central obesity but is unlikely to impact the risk of metabolic syndrome. The potential health effects of artificial sweeteners in coffee need further investigation.

The acute effects of coffee ingestion on postural control and physical function in older adults: A randomised crossover trial

Caffeine consumption can elicit improvements in aspects of physical function in older adults but also, negatively modify standing balance, potentially increasing fall risk. However, balance alterations and changes in physical function induced by commonly consumed caffeine vehicles such as coffee have not been investigated. Therefore, this study investigated coffee ingestion providing 3 mg·kg BW−1 caffeine on balance performance and physical function, in a group of older adults. In a randomised, crossover design, 22 older adults (Male n = 10, Age: 68 ± 6 years) completed bipedal standing balance and physical function assessments (Senior Fitness Test) under one of the following conditions: caffeinated coffee (COF), decaffeinated coffee (DEC), placebo (PLA) or a control (CON) (no fluid ingestion). Centre of pressure (COP) root mean square and power frequency were calculated to characterise postural performance and strategy, respectively. The complexity (i.e., regularity) of the COP signal was also determined by calculating sample entropy. Caffeinated coffee had limited effects on COP outcomes. Frequency of the COP in the anteroposterior direction was greater following COF compared to DEC (P = 0.047;g = 0.29) but there were no statistical differences between COF and PLA or CON (P > 0.05). Furthermore, there were no significant performance differences between any conditions in all tests of physical function (P > 0.05). This suggests that coffee has limited effects on balance performance or physical function but may influence both balance complexity and the strategy utilised to maintain upright stance. Overall, a strong cup of coffee does not significantly influence balance and measures of functional performance in healthy older adults.

The Embodiment of National Image in Ceramic Products with China and European Countries Exchange and Dissemination Case Study: Turkish Coffee Cups

Culture is a broad concept encompassing material and spiritual aspects acquired through socialization and experience. It includes language, beliefs, ethical standards, and consumption patterns, uniting people within a community and significantly influencing their behavior. Culture plays an important role in design and influences the design process according to ever-changing behavior patterns. Product design, a subset of the design field, provides a tangible platform for expressing cultural knowledge. Consequently, product design is a significant medium for illustrating the impact of cultural influences. The interaction between different cultures further shapes design fields, leading to the development of products that may acquire new characteristics or undergo adaptations based on the specific geographical context in which they are situated. Especially when the field of gastronomy, and food and beverage utensils is examined, it is known that the ceramic tools used are in new design relationships in this context. Traditional Turkish coffee culture encompasses the convergence of Chinese, Turkish, and European influences in product design today, exemplified by the use of Turkish ceramic coffee cups. The purpose of this study is to illustrate how national images and a country’s national identity are constructed and expressed in the designs of its ceramic products from the perspective of material culture studies, from past to present, starting from the Chinese, Ottoman Empire and Europe interaction, how shaped today’s ceramic Turkish coffee cups of today and also new possibilities that can process around this area.

Association between coffee and tea consumption and the risk of dementia in individuals with hypertension: a prospective cohort study

Many studies have shown that drinking coffee and tea may be associated with the risk of hypertension and dementia. Limited research exists on their impact on dementia risk in hypertensive patients. This study aimed to determine the association between coffee and tea consumption and the risk of dementia development in hypertensive population by utilizing Cox proportional risk modeling with 453,913 participants from a UK biobank. Our findings reveal a J-shaped and U-shaped association between the risk of all-cause dementia and the consumption of coffee and tea respectively in hypertensive people. The hypertensive patients who drink 0.5–1 cup of coffee or 4–5 cups of tea per day have the lowest risk of dementia. A U-shaped relationship was observed between daily caffeine consumption and the risk of developing all-cause dementia and vascular dementia in the hypertensive population. Furthermore, the significant association between the amount of coffee and tea consumed and the risk of all-cause and vascular dementia were more likely to be found in hypertensive patients than in the non-hypertensive population.

How a soup bowl and a coffee cup cool down

How a soup bowl and a coffee cup cool down