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You searched for: Publication year rev 7985-2015 Remove constraint Publication year rev: 7985-2015 Subject term caffeine Remove constraint Subject term: caffeine
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1. A Conceptual Demonstration of Decaffeination via Nanofiltration

Author:
Ong Yee Kang; Ng Hui Ting; Chung Tai-Shung
Source:
Industrial & Engineering Chemistry Research 2015 v.54 no.31 pp. 7737-7742
ISSN:
1520-5045
Subject:
caffeine; decaffeination; engineering; models; molecular weight; nanofiltration; temperature
Abstract:
... This study aims to evaluate the feasibility of using novel nanofiltration (NF) membranes for decaffeination of coffee wherein caffeine present in the feed solution is recovered at the permeate of the membrane. The NF hollow fiber membranes were fabricated and tested with model solutions to evaluate the recovery of caffeine as functions of molecular weight/size of organic molecules, caffeine concen ...
DOI:
10.1021/acs.iecr.5b01737

2. A Cup Today or a Pot Later: On the Discounting of Delayed Caffeinated Beverages

Author:
David P. Jarmolowicz; Shea M. Lemley; Dylan Cruse; Michael J. Sofis
Source:
Journal of agricultural & food industrial organization 2015 v.13 no.1 pp. 101-111
ISSN:
1542-0485
Subject:
beverages; caffeine; cocaine; drug abuse; obesity; questionnaires
Abstract:
... Delay discounting describes how the subjective value of a given commodity decreases as the delay to receiving that commodity increases. Decades of behavioral economic research have found that individuals suffering from a range of clinical conditions (e.g., drug addiction, obesity) tend to devalue delayed rewards more quickly than individuals without said clinical conditions and that such individua ...
DOI:
10.1515/jafio-2015-0021

3. A study on quality components and sleep-promoting effects of GABA black tea

Author:
Wenfang Zhao; Yun Li; William Ma; Yazhong Ge; Yahui Huang
Source:
Food & function 2015 v.6 no.10 pp. 3393-3398
ISSN:
2042-650X
Subject:
black tea; body weight; caffeine; drying; flavanols; free amino acids; gamma-aminobutyric acid; mice; pentobarbital; polyphenols; sleep; sodium
Abstract:
... The aims of this study were to analyze the changes in quality components of gamma (γ)-aminobutyric acid (GABA) black tea during processing, and to investigate the effect of three dosages of GABA black tea on sleep improvement. The results showed that the GABA content was increased significantly up to 2.70 mg g⁻¹ after vacuum anaerobic and aerobic treatment. In addition, the content of GABA after d ...
DOI:
10.1039/c5fo00265f

4. An optimized and validated SPE-LC–MS/MS method for the determination of caffeine and paraxanthine in hair

Author:
Pieter M.M. De Kesel; Willy E. Lambert; Christophe P. Stove
Source:
Talanta 2015 v.144 pp. 62-70
ISSN:
0039-9140
Subject:
buffers; caffeine; cleaning; decontamination; drugs; guidelines; isotope labeling; metabolites; pH; phenotype; proteinases; spectrometers
Abstract:
... Caffeine is the probe drug of choice to assess the phenotype of the drug metabolizing enzyme CYP1A2. Typically, molar concentration ratios of paraxanthine, caffeine’s major metabolite, to its precursor are determined in plasma following administration of a caffeine test dose. The aim of this study was to develop and validate an LC–MS/MS method for the determination of caffeine and paraxanthine in ...
DOI:
10.1016/j.talanta.2015.05.084

5. Application of gas chromatography-mass spectrometry and chemometrics methods for assessing volatile profiles of Pu-erh tea with different processing methods and ageing years

Author:
Shidong Lv; Yuanshuang Wu; Jifu Wei; Ming Lian; Chen Wang; Xuemei Gao; Qingxiong Meng
Source:
RSC advances 2015 v.5 no.107 pp. 87806-87817
ISSN:
2046-2069
Subject:
beta-ionone; caffeine; cedrol; chemometrics; cluster analysis; gas chromatography-mass spectrometry; headspace analysis; linalool; manufacturing; multivariate analysis; odors; palmitic acid; principal component analysis; solid phase microextraction; tea; volatile compounds
Abstract:
... Volatile changes and the post-fermentation ageing process of tea remain largely unknown. Additionally, the understanding of ageing and storage processes of tea mostly rely on sensory experience and lack the support of scientific and accurate data. In this paper, a method was developed based on head-space solid phase microextraction/gas chromatography-mass spectrometry (HS-SPME/GC-MS) combined with ...
DOI:
10.1039/c5ra15381f

6. Are standard tests sensitive enough to evaluate effects of human pharmaceuticals in aquatic biota? Facing changes in research approaches when performing risk assessment of drugs

Author:
G.V. Aguirre-Martínez; M.A. Owuor; C. Garrido-Pérez; M.J. Salamanca; T.A. Del Valls; M.L. Martín-Díaz
Source:
Chemosphere 2015 v.120 pp. 75-85
ISSN:
0045-6535
Subject:
Isochrysis galbana; Paracentrotus lividus; Selenastrum capricornutum; Vibrio fischeri; acute toxicity; adverse effects; aquatic environment; bacteria; bioassays; bioluminescence; caffeine; dimethyl sulfoxide; environmental exposure; environmental impact; freshwater; guidelines; humans; ibuprofen; microalgae; novobiocin; risk; risk characterization; teratogenicity
Abstract:
... Nowadays, the presence of pharmaceutical products in aquatic environments is not only common, but is also of significant concern regarding the adverse effect they may produce to aquatic biota. In order to determine the adverse effects of caffeine (CAF), ibuprofen (IBU), carbamazepine (CBZ) and novobiocin (NOV), at environmental occurring concentrations, standardized endpoints applied in current gu ...
DOI:
10.1016/j.chemosphere.2014.05.087

7. Assessment of caffeine intake in the Korean population

Author:
Ho Soo Lim; Ju Young Hwang; Jae Chon Choi; Meehye Kim
Source:
Food additives & contaminants 2015 v.32 no.11 pp. 1786-1798
ISSN:
1944-0057
Subject:
National Health and Nutrition Examination Survey; adults; caffeine; carbonated beverages; high performance liquid chromatography; markets; Korean Peninsula
Abstract:
... An improved method for the analysis of caffeine in foods by HPLC was validated by measuring several analytical parameters. The caffeine contents of 1202 products available from Korean markets were analysed. A consumption study was conducted by using data from the Korea National Health and Nutrition Examination Survey (KNHANES), 2010–12, to estimate the caffeine intakes of the Korean population. Th ...
DOI:
10.1080/19440049.2015.1077396

8. Associations of chemical tracers and faecal indicator bacteria in a tropical urban catchment

Author:
E. Ekklesia; P. Shanahan; L.H.C. Chua; H.S. Eikaas
Source:
Water research 2015 v.75 pp. 270-281
ISSN:
0043-1354
Subject:
acetaminophen; active ingredients; boron; caffeine; cholesterol; coprostanol; data collection; detergents; drainage water; feces; human health; humans; ibuprofen; indicator species; land use; methylene blue; phthalates; residential areas; saccharin; sewage; sucralose; surface water; tracer techniques; wastewater; water pollution; water quality; watersheds
Abstract:
... Surface water contamination by human faecal wastes is a widespread hazard for human health. Faecal indicator bacteria (FIB) are the most widely used indicators to assess surface water quality but are less-human-specific and have the potential to survive longer and/or occur naturally in tropical areas. In this study, 13 wastewater chemicals (chloride, boron, orthosphophate, detergents as methylene ...
DOI:
10.1016/j.watres.2015.02.037

9. Attenuation of trace organic compounds (TOrCs) in bioelectrochemical systems

Author:
Craig M. Werner; Christiane Hoppe-Jones; Pascal E. Saikaly; Bruce E. Logan; Gary L. Amy
Source:
Water research 2015 v.73 pp. 56-67
ISSN:
0043-1354
Subject:
acetates; atrazine; biocides; bioelectrochemistry; biotransformation; caffeine; carbon; deet; electric current; electrodes; electrolysis; energy; hydrogen; hydrophilicity; microbial fuel cells; microorganisms; municipal wastewater; pH; phosphates; sorption; trimethoprim; wastewater treatment
Abstract:
... Microbial fuel cells (MFCs) and microbial electrolysis cells (MECs) are two types of microbial bioelectrochemical systems (BESs) that use microorganisms to convert chemical energy in wastewaters into useful energy products such as (bio)electricity (MFC) or hydrogen gas (MEC). These two systems were evaluated for their capacity to attenuate trace organic compounds (TOrCs), commonly found in municip ...
DOI:
10.1016/j.watres.2015.01.013

10. Bioprocess of robusta cherry coffee with polyphenol oxidase and quality enhancement

Author:
Ritika Mathur; P. N. Navya; K. Basavaraj; Pushpa S. Murthy
Source:
European food research & technology 2015 v.240 no.2 pp. 319-325
ISSN:
1438-2377
Subject:
Coffea arabica; Coffea canephora; Pleurotus florida; Pleurotus ostreatus; ammonium sulfate; beans; bioprocessing; bitterness; caffeine; catechol oxidase; chemical reactions; coffee beans; consumer satisfaction; food research; foods; fruiting bodies; molecular weight; pH; phenolic compounds; polyacrylamide gel electrophoresis; proteins; temperature
Abstract:
... Flavor plays an important role in consumer satisfaction and influences further consumption of foods. Robusta coffee is rich in caffeine and phenolics and is undesirable for coffee connoisseurs compared to arabica coffee. The exogenous polyphenol oxidase (4,000 U/ml) was extracted from the fruiting bodies of Pleurotus florida otherwise referred as the oyster mushroom. The polyphenol oxidase (PPO) w ...
DOI:
10.1007/s00217-014-2331-8

11. Blockade of phosphodiesterase 4 reverses morphine-induced ventilatory disturbance without loss of analgesia

Author:
Satoko Kimura; Yoshiaki Ohi; Akira Haji
Source:
Life sciences 2015 v.127 pp. 32-38
ISSN:
0024-3205
Subject:
adenosine; adverse effects; analgesia; caffeine; cyclic AMP; enzyme inhibitors; morphine; narcotics; nerve tissue; neurons; rats
Abstract:
... Ventilatory disturbance is a fatal side-effect of opioid analgesics. Separation of analgesia from ventilatory depression is important for therapeutic use of opioids. It has been suggested that opioid-induced ventilatory depression results from a decrease in adenosine 3′,5′-cyclic monophosphate content in the respiratory-related neurons. Therefore, we examined the effects of caffeine, a methylxanth ...
DOI:
10.1016/j.lfs.2015.02.006

12. Caffeine ameliorates high energy diet-induced hepatic steatosis: sirtuin 3 acts as a bridge in the lipid metabolism pathway

Author:
Shi-Jie Zhang; Yi-Fang Li; Guo-En Wang; Rui-Rong Tan; Bun Tsoi; Gao-Wei Mao; Yu-Jia Zhai; Ling-Fang Cao; Min Chen; Hiroshi Kurihara; Qi Wang; Rong-Rong He
Source:
Food & function 2015 v.6 no.8 pp. 2578-2587
ISSN:
2042-650X
Subject:
adenosine diphosphate; adenosine triphosphate; alanine transaminase; aspartate transaminase; body weight; caffeine; cyclic AMP; energy; fatty liver; high energy diet; human cell lines; lipid metabolism; lipids; liver; mice; phosphorylation; small interfering RNA; staining
Abstract:
... The beneficial effect of caffeine-containing food on non-alcoholic fatty liver disease (NAFLD) has been widely reported. The aim of this study was to explore the effect of caffeine on hepatic steatosis. C57BL/6 mice were randomly assigned to a normal diet or a high energy diet (HED). Caffeine was given to HED mice by oral gavage. Body weights, lipids in the liver and liver damage were measured. Me ...
DOI:
10.1039/c5fo00247h

13. Caffeine dimerization: effects of sugar, salts, and water structure

Author:
Seishi Shimizu
Source:
Food & function 2015 v.6 no.10 pp. 3228-3235
ISSN:
2042-650X
Subject:
additives; bitterness; caffeine; dimerization; models; salts; sugars; thermodynamics
Abstract:
... Sugars and salts strongly affect the dimerization of caffeine in water. Such a change of dimerization, considered to be crucial for bitter taste suppression, has long been rationalized by the change of “water structure” induced by the additives; “kosmotropic” (water structure enhancing) salts and sugars promote dimerization, whereas “chaotropic” (water structure breaking) salts suppress dimerizati ...
DOI:
10.1039/c5fo00610d

14. Caffeine increases sugar-sweetened beverage consumption in a free-living population: a randomised controlled trial

Author:
Russell S. J. Keast; Boyd A. Swinburn; Dhoungsiri Sayompark; Susie Whitelock; Lynn J. Riddell
Source:
British journal of nutrition 2015 v.113 no.2 pp. 366-371
ISSN:
1475-2662
Subject:
ad libitum feeding; caffeine; flavor; food additives; food records; hedonic scales; high energy foods; obesity; randomized clinical trials; sugar sweetened beverages
Abstract:
... Excessive sugar-sweetened beverage (SSB) consumption has been associated with overweight and obesity. Caffeine is a common additive to SSB, and through dependence effects, it has the potential to promote the consumption of caffeine-containing foods. The objective of the present study was to assess the influence that caffeine has on the consumption of SSB. Participants (n 99) were blindly assigned ...
DOI:
10.1017/S000711451400378X
PubMed:
25567475

15. Caffeine ingestion does not affect afternoon muscle power and fatigue during the Wingate test in elite judo players

Author:
Makram Souissi; Asma Aloui; Hamdi Chtourou; Hassen Ben Aouicha; Rim Atheymen; Zouhair Sahnoun
Source:
Biological rhythm research 2015 v.46 no.2 pp. 291-298
ISSN:
1744-4179
Subject:
anxiety; biological rhythms; caffeine; ingestion; muscles; placebos; vigor
Abstract:
... The purpose of the present study was to evaluate the effect of caffeine ingestion on elite judo players’ mood states, simple reaction time, and muscle power during the Wingate test in the afternoon. Ten elite judo players (age: 21.08 ± 1.16 years, body mass: 83.75 ± 20.2 kg, height: 1.76 ± 0.07 m) took part in this study. The performance variables were measured during two test sessions scheduled a ...
DOI:
10.1080/09291016.2014.994857

16. Caffeine inhibits hepatitis C virus replication in vitro

Author:
Mariana N. Batista; Bruno M. Carneiro; Ana Cláudia S. Braga; Paula Rahal
Source:
Archives of virology 2015 v.160 no.2 pp. 399-407
ISSN:
0304-8608
Subject:
Hepatitis C virus; biochemistry; caffeine; dose response; fibrosis; genotype; hepatitis C; hepatoma; liver; liver function; virus replication
Abstract:
... Hepatitis C is considered the major cause of cirrhosis and hepatocellular carcinoma. Conventional treatment is not effective against some hepatitis C virus (HCV) genotypes; therefore, new treatments are needed. Coffee and, more recently, caffeine, have been found to have a beneficial effect in several disorders of the liver, including those manifesting abnormal liver biochemistry, cirrhosis and he ...
DOI:
10.1007/s00705-014-2302-1

17. Caffeine stimulates in vitro pituitary LH secretion in lipopolysaccharide-treated ewes

Author:
Andrzej Przemysław Herman; Anna Herman; Janina Skipor; Agata Krawczyńska; Joanna Bochenek; Dorota Tomaszewska-Zaremba
Source:
Reproductive Biology 2015 v.15 no.1 pp. 20-26
ISSN:
1642-431X
Subject:
anterior pituitary; caffeine; endotoxins; ewes; explants; gene expression; gonadotropin-releasing hormone; in vitro studies; lipopolysaccharides; luteinizing hormone; receptors; secretion
Abstract:
... The study was designed to determine the effects of caffeine on luteinizing hormone (LH) secretion and gene expression of caffeine-associated receptors in anterior pituitary (AP) explants obtained from saline- and lipopolysaccharide (LPS)-treated ewes. Animals had been treated with LPS or saline daily for seven days. Three hours after the last injection of LPS/saline, the AP were collected and divi ...
DOI:
10.1016/j.repbio.2014.12.001

18. Caffeine’s Antioxidant Potency Optically Sensed with Double-Stranded DNA-Encased Single-Walled Carbon Nanotubes

Author:
Zhao Edward H.; Ergul Busra; Zhao Wei
Source:
Journal of physical chemistry 2015 v.119 no.10 pp. 4068-4075
ISSN:
1520-5207
Subject:
DNA; ascorbic acid; caffeine; carbon nanotubes; hydrogen peroxide; hydroxyl radicals; oxidative stress; physical chemistry; uric acid
Abstract:
... There is great interest in developing a sensitive method being able to quantitatively measure and compare antioxidant potencies of samples of interest against multiple reactive oxygen species (ROS) whose imbalance could cause oxidative stress. Here, a sensitive nanoprobe, double-stranded DNA encased single-walled carbon nanotubes (SWNTs) has been developed to determine antioxidant potencies of sel ...
DOI:
10.1021/acs.jpcb.5b00708

19. Can Energy Drinks Increase the Desire for More Alcohol?

Author:
Cecile A Marczinski
Source:
Advances in food and nutrition research 2015 v.6 no.1 pp. 96-101
ISSN:
1043-4526
Subject:
alcohol abuse; alcohol drinking; alcohols; binging; caffeine; energy drinks; epidemiological studies; humans; markets; mixers; public health; risk
Abstract:
... Energy drinks, the fastest growing segment in the beverage market, have become popular mixers with alcohol. The emerging research examining the use of alcohol mixed with energy drinks (AmEDs) indicates that the combination of caffeine-containing energy drinks with alcohol may be riskier than the use of alcohol alone. The public health concerns arising from AmED use are documented in different rese ...
DOI:
10.3945/an.114.007393
PubMed:
25593148
PubMed Central:
PMC4288285

20. Characterizing Drug Release from Nonfouling Polyampholyte Hydrogels

Author:
Barcellona Marcos N.; Johnson Nicholas; Bernards Matthew T.
Source:
Langmuir 2015 v.31 no.49 pp. 13402-13409
ISSN:
1520-5827
Subject:
bioactive compounds; caffeine; chlorides; drugs; enzyme-linked immunosorbent assay; hydrogels; ionic strength; methylene blue; pH; tissue repair
Abstract:
... Controlled delivery of bioactive signaling molecules and drugs is essential for the development of the next generation of tissue regeneration scaffolds. However, these molecules must be delivered from a nonfouling platform, so that the therapeutic role is not masked by the naturally occurring foreign body response. Therefore, the purpose of this study is to characterize the release profiles of thr ...
DOI:
10.1021/acs.langmuir.5b03597