keyword
MENU ▼
Read by QxMD icon Read
search

Caffeinated

keyword
https://www.readbyqxmd.com/read/29050865/chloride-enhanced-oxidation-of-organic-contaminants-by-cu-ii-catalyzed-fenton-like-reaction-at-neutral-ph
#1
Hongshin Lee, Juhee Seong, Ki-Myeong Lee, Hak-Hyeon Kim, Jaemin Choi, Jae-Hong Kim, Changha Lee
The Cu(II)-catalyzed Fenton-like reaction was found to be significantly accelerated in the presence of chloride ion (i.e., the Cu(II)/H2O2/Cl(-) system), enhancing the oxidative degradation of organic contaminants at neutral pH. The degradation of carbamazepine (a select target contaminant) by the Cu(II)/H2O2 system using 1μM Cu(II) and 10mM H2O2 was accelerated by 28-fold in the presence of 10,000mg/L Cl(-) at pH 7. The observed rate of carbamazepine degradation generally increased with increasing doses of Cu(II), H2O2, and Cl(-), and exhibited an optimal value at around pH 7...
October 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29050286/a-prospective-study-of-serum-metabolites-and-glioma-risk
#2
Jiaqi Huang, Stephanie J Weinstein, Cari M Kitahara, Edward D Karoly, Joshua N Sampson, Demetrius Albanes
Malignant glioma is one of the most lethal adult cancers, yet its etiology remains largely unknown. We conducted a prospective serum metabolomic analysis of glioma based on 64 cases and 64 matched controls selected from Alpha-Tocopherol, Beta-Carotene Cancer Prevention (ATBC) Study. Median time from collection of baseline fasting serum to diagnosis was nine years (inter-decile range 3-20 years). LC/MS-MS identified 730 known metabolites, and conditional logistic regression models estimated odds ratios for one-standard deviation differences in log-metabolite signals...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29049947/3d-spongy-graphene-modified-screen-printed-sensors-for-the-voltammetric-determination-of-the-narcotic-drug-codeine
#3
Mona A Mohamed, Dalia M El-Gendy, Nashaat Ahmed, Craig E Banks, Nageh K Allam
Adenine-functionalized spongy graphene (FSG) composite, fabricated via a facile and green synthetic method, has been explored as a potential electrocatalyst toward the electroanalytical sensing of codeine phosphate (COD). The synthesized composite is characterized using Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray powder diffraction, UV-vis absorption spectroscopy, scanning electron microscopy, high resolution transmission electron microscopy (HRTEM), and thermogravimetric analysis...
October 11, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29049110/evidence-for-the-efficacy-of-systemic-opioid-sparing-analgesics-in-pediatric-surgical-populations-a-systematic-review
#4
Alyssa Zhu, Hubert A Benzon, T Anthony Anderson
While a large number of studies has examined the efficacy of opioid-sparing analgesics in adult surgical populations, fewer studies are available to guide postoperative pain treatment in pediatric patients. We systematically reviewed available publications on the use of systemic nonopioid agents for postoperative analgesia in pediatric surgical populations. A comprehensive literature search identified meta-analyses and randomized controlled trials (RCTs) assessing the effects of systemic, nonopioid agents on postoperative narcotic requirements or pain scores in pediatric surgical populations...
November 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29049076/fatigue-risk-management-the-impact-of-anesthesiology-residents-work-schedules-on-job-performance-and-a-review-of-potential-countermeasures
#5
Lily R Wong, Erin Flynn-Evans, Keith J Ruskin
Long duty periods and overnight call shifts impair physicians' performance on measures of vigilance, psychomotor functioning, alertness, and mood. Anesthesiology residents typically work between 64 and 70 hours per week and are often required to work 24 hours or overnight shifts, sometimes taking call every third night. Mitigating the effects of sleep loss, circadian misalignment, and sleep inertia requires an understanding of the relationship among work schedules, fatigue, and job performance. This article reviews the current Accreditation Council for Graduate Medical Education guidelines for resident duty hours, examines how anesthesiologists' work schedules can affect job performance, and discusses the ramifications of overnight and prolonged duty hours on patient safety and resident well-being...
October 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29048540/long-read-sequencing-of-the-coffee-bean-transcriptome-reveals-the-diversity-of-full-length-transcripts
#6
Bing Cheng, Agnelo Furtado, Robert J Henry
Background: Polyploidization contributes to the complexity of gene expression resulting in numerous related but different transcripts. This study explored the transcriptome diversity and complexity of tetraploid Arabica coffee ( Coffea arabica ) bean. Long-read sequencing (LRS) by Pacbio Isoform sequencing (Iso-seq) was used to obtain full-length transcripts without the difficulty and uncertainty of assembly required for reads from short read technologies. The tetraploid transcriptome was annotated and compared with data from the sub-genome progenitors...
August 30, 2017: GigaScience
https://www.readbyqxmd.com/read/29047215/acute-cardiovascular-effects-of-bitter-orange-extract-p-synephrine-consumed-alone-and-in-combination-with-caffeine-in-human-subjects-a-placebo-controlled-double-blind-study
#7
Nicholas A Ratamess, Jill A Bush, Sidney J Stohs, Nicole L Ellis, Ira T Vought, Elizabeth A O'Grady, Jeremy D Kuper, Saif B Hasan, Jie Kang, Avery D Faigenbaum
The purpose was to examine cardiovascular responses to supplementation with p-synephrine alone and in combination with caffeine during quiet sitting. Sixteen subjects were given (in double-blind manner) either 103 mg of p-synephrine (S), 233 mg of caffeine +104 mg of p-synephrine (LC + S), 240 mg of caffeine (LC), 337 mg of caffeine +46 mg of p-synephrine (HC + S), 325 mg of caffeine (HC), or a placebo. The subjects sat quietly for 3 hr while heart rate (HR) and blood pressure were measured. Only HC + S and HC significantly increased mean systolic blood pressure (SBP) during the second hour and tended to increase mean SBP during the third hour...
October 19, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29044427/genomic-identification-expression-profiling-and-functional-characterization-of-catsper-channels-in-the-bovine
#8
Gillian P Johnson, Anne-Marie English, Sinead Cronin, David A Hoey, Kieran G Meade, Sean Fair
Cation channels of sperm (CatSper) are sperm-specific calcium channels with identified roles in the regulation of sperm function in humans, mice, and horses. We sought to employ a comparative genomics approach to identify conserved CATSPER genes in the bovine genome, and profile their expression in reproductive tissue. We hypothesized that CATSPER proteins expressed in bull testicular tissue mediates sperm hyperactivation and their rheotactic response in the reproductive tract of the cow. Bioinformatic analysis identified all four known CATSPER genes (CATSPER 1-4) in the bovine genome, and profiling by quantitative real-time polymerase chain reaction identified site-specific variation in messenger ribonucleic acid (mRNA) expression for all four genes along the reproductive tract of the bull...
August 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29044171/pharmacological-sensitivity-of-reflexive-and-nonreflexive-outcomes-as-a-correlate-of-the-sensory-and-affective-responses-to-visceral-pain-in-mice
#9
Beatriz de la Puente, Daniel Zamanillo, Luz Romero, José M Vela, Manuel Merlos, Enrique Portillo-Salido
Pain encompasses both sensory and affective dimensions which can be differentially modulated by drugs. Here, we compare the pharmacological sensitivity of the sensory and affective responses using acetic acid-induced abdominal writhings (sensory-reflexive outcome) and acetic acid-induced depression of reward seeking behaviour (RSB, affective-nonreflexive outcome) to a highly palatable food in mice. We found that the expression of RSB critically depends on factors such as sex and previous knowledge and type of the food stimulus...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29042830/evaluation-of-the-effects-of-two-doses-of-alpha-glycerylphosphorylcholine-on-physical-and-psychomotor-performance
#10
Lena Marcus, Jason Soileau, Lawrence W Judge, David Bellar
BACKGROUND: Recent studies have suggested that alpha glycerylphosphorylcholine (A-GPC) may be an effective ergogenic aid. The present study was designed to assess the efficacy of two doses of A-GPC in comparison to placebo and caffeine for increasing countermovement jump performance, isometric strength, and psychomotor function. METHODS: Forty-eight healthy, college aged males volunteered for the present study and underwent baseline assessment of countermovement jump (CMJ), isometric mid thigh pull (IMTP), upper body isometric strength test (UBIST), and psychomotor vigilance (PVT)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29037810/chemical-and-thermal-sensitivity-of-medaka-trpa1-analyzed-in-heterologous-expression-system
#11
Mai Oda, Kan Saito, Shun Hatta, Yoshihiro Kubo, Osamu Saitoh
TRPA1 of insects and several tetrapod vertebrates except for those of rodents have been reported to be activated by noxious chemicals and also by high temperature with a relatively clear threshold. We previously analyzed the characteristics of two TRPA1 paralogs of zebrafish (zTRPA1a, b) and demonstrated that zTRPA1a is specialized for chemical sensing while zTRPA1b responds to thermal stimulations, that zTRPA1b responds to both cold and heat stimuli, and that heat stimulation gradually activates zTRPA1b without a clear threshold...
October 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29037693/conducting-polymer-modified-screen-printed-carbon-electrode-coupled-with-magnetic-solid-phase-microextraction-for-determination-of-caffeine
#12
Hayati Filik, Asiye Aslıhan Avan
In the current study, we introduce magnetic solid phase microextraction coupled with electrochemical detection of caffeine. A commercially available disposable screen-printed carbon electrodes modified with poly Alizarin Red S are employed as electrochemical sensors in the detection stage. However, the suitability of magnetic solid phase microextraction for electroanalytical methods such as square wave voltammetry has not been declared. With our optimised conditions in hand, the system response was linearly proportional to the concentration of caffeine in the range of 0...
March 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29036553/two-track-control-of-cellular-machinery-for-photomovement-in-spirogyra-varians-streptophyta-zygnematales
#13
Ji Woong Lee, Gwang Hoon Kim
Plants and freshwater algae devoid of flagella evolved various photomovements to optimize their photosynthetic efficiency. The filaments of Spirogyra varians exhibit complex swaying and undulating movement and form a compact mat which enables them to adjust their light exposure. Photomovement of filament fragments (1-10 cells) was analyzed using various photoreceptor and cytoskeleton inhibitors under monochromatic light. Different patterns of movement were observed under red and blue light. The filaments showed positive phototropism under blue light...
September 27, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29035597/influence-of-2-weeks-ingestion-of-high-chlorogenic-acid-coffee-on-mood-state-performance-and-post-exercise-inflammation-and-oxidative-stress-a-randomized-placebo-controlled-trial
#14
David C Nieman, Courtney L Goodman, Christopher R Capps, Zack L Shue, Robert Arnot
This study measured the influence of 2-weeks ingestion of high chlorogenic acid (CQA) coffee on post-exercise inflammation and oxidative stress, with secondary outcomes including performance and mood state. Cyclists (N=15) were randomized to CQA coffee or placebo (300 ml/day) for 2 weeks, participated in a 50-km cycling time trial, and then crossed over to the opposite condition with a 2-week washout period. Blood samples were collected pre- and post-supplementation, and immediately post-exercise. CQA coffee was prepared using the Turkish method with 30 g lightly roasted, highly ground Hambela coffee beans in 300 ml boiling water, and provided 1,066 mg CQA and 474 mg caffeine versus 187 mg CQA and 33 mg caffeine for placebo...
October 16, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29032095/a-review-on-environmental-monitoring-of-water-organic-pollutants-identified-by-eu-guidelines
#15
REVIEW
João C G Sousa, Ana R Ribeiro, Marta O Barbosa, M Fernando R Pereira, Adrián M T Silva
The contamination of fresh water is a global concern. The huge impact of natural and anthropogenic organic substances that are constantly released into the environment, demands a better knowledge of the chemical status of Earth's surface water. Water quality monitoring studies have been performed targeting different substances and/or classes of substances, in different regions of the world, using different types of sampling strategies and campaigns. This review article aims to gather the available dispersed information regarding the occurrence of priority substances (PSs) and contaminants of emerging concern (CECs) that must be monitored in Europe in surface water, according to the European Union Directive 2013/39/EU and the Watch List of Decision 2015/495/EU, respectively...
October 3, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29031461/sleep-sport-and-the-brain
#16
Shona L Halson, Laura E Juliff
The recognition that sleep is one of the foundations of athlete performance is increasing both in the elite athlete arena as well as applied performance research. Sleep, as identified through sleep deprivation and sleep extension investigations, has a role in performance, illness, injury, metabolism, cognition, memory, learning, and mood. Elite athletes have been identified as having poorer quality and quantity of sleep in comparison to the general population. This is likely the result on training times, competition stress/anxiety, muscle soreness, caffeine use, and travel...
2017: Progress in Brain Research
https://www.readbyqxmd.com/read/29029309/limited-efficacy-of-caffeine-and-recovery-costs-during-and-following-5-days-of-chronic-sleep-restriction-caffeine-and-sleep-restriction
#17
Tracy Jill Doty, Christine J So, Elizabeth M Bergman, Sara K Trach, Ruthie H Ratcliffe, Angela M Yarnell, Vincent F Capaldi, James E Moon, Thomas J Balkin, Phillip J Quartana
Objectives: To investigate the effects of caffeine on psychomotor vigilance and sleepiness during sleep restriction and following subsequent recovery sleep. Methods: Participants were N=48 healthy good sleepers. All participants underwent 5 nights of sleep satiation [time-in-bed (TIB): 10 hrs], followed by 5 nights of sleep restriction (TIB: 5 hrs), and 3 nights of recovery sleep (TIB: 8 hrs) in a sleep laboratory. Caffeine (200 mg) or placebo was administered in the form of chewing gum at 0800 and 1200 hrs each day during the sleep restriction phase...
October 5, 2017: Sleep
https://www.readbyqxmd.com/read/29029291/nutrition-influences-caffeine-mediated-sleep-loss-in-drosophila
#18
Erin S Keebaugh, Jin Hong Park, Chenchen Su, Ryuichi Yamada, William W Ja
Study objectives: Plant-derived caffeine is regarded as a defensive compound produced to prevent herbivory. Caffeine is generally repellent to insects and often used to study the neurological basis for aversive responses in the model insect, Drosophila melanogaster. Caffeine is also studied for its stimulatory properties where sleep or drowsiness is suppressed across a range of species. Since limiting access to food also inhibits fly sleep-an effect known as starvation-induced sleep suppression-we tested whether aversion to caffeinated food results in reduced nutrient intake and assessed how this might influence fly studies on the stimulatory effects of caffeine...
October 3, 2017: Sleep
https://www.readbyqxmd.com/read/29025033/heavier-smoking-increases-coffee-consumption-findings-from-a-mendelian-randomization-analysis
#19
Johan H Bjørngaard, Ask Tybjærg Nordestgaard, Amy E Taylor, Jorien L Treur, Maiken E Gabrielsen, Marcus R Munafò, Børge Grønne Nordestgaard, Bjørn Olav Åsvold, Pål Romundstad, George Davey Smith
Background: There is evidence for a positive relationship between cigarette and coffee consumption in smokers. Cigarette smoke increases metabolism of caffeine, so this may represent a causal effect of smoking on caffeine intake. Methods: We performed Mendelian randomization analyses in the UK Biobank ( N  = 114 029), the Norwegian HUNT study ( N  = 56 664) and the Copenhagen General Population Study (CGPS) ( N  = 78 650). We used the rs16969968 genetic variant as a proxy for smoking heaviness in all studies and rs4410790 and rs2472297 as proxies for coffee consumption in UK Biobank and CGPS...
August 14, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29024883/emerging-organic-pollutants-in-the-vadose-zone-of-a-soil-aquifer-treatment-system-pore-water-extraction-using-positive-displacement
#20
Alexander Sopilniak, Roy Elkayam, Anna Voloshenko Rossin, Ovadia Lev
Trace organic compounds in effluents, water streams and aquifers are amply reported. However, the mobile pool of Emerging Organic Contaminants (EOCs) in the deep parts of the vadose zone is hard to estimate, due to difficulties in extraction of sufficient quantity of pore water. Here, we present a new methodology for depth profiling of EOCs in pore water by Positive Displacement Extraction (PDE): Pore water extraction from unsaturated soil samples is carried out by withdrawal of soil cores by direct-push drilling and infiltrating the core by organics free water...
October 3, 2017: Chemosphere
keyword
keyword
20675
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"