keyword
MENU ▼
Read by QxMD icon Read
search

Lambert

keyword
https://www.readbyqxmd.com/read/28431312/melatonin-charge-transfer-complex-with-2-3-dichloro-5-6-dicyano-1-4-benzoquinone-molecular-structure-dft-studies-thermal-analyses-evaluation-of-biological-activity-and-utility-for-determination-of-melatonin-in-pure-and-dosage-forms
#1
Gehad G Mohamed, Maher M Hamed, Nadia G Zaki, Mohamed M Abdou, Marwa El-Badry Mohamed, Abanoub Mosaad Abdallah
A simple, accurate and fast spectrophotometric method for the quantitative determination of melatonin (ML) drug in its pure and pharmaceutical forms was developed based on the formation of its charge transfer complex with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as an electron acceptor. The different conditions for this method were optimized accurately. The Lambert-Beer's law was found to be valid over the concentration range of 4-100μgmL(-1) ML. The solid form of the CT complex was structurally characterized by means of different spectral methods...
April 4, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28428867/adaptative-evolution-of-the-vkorc1-gene-in-mus-musculus-domesticus-is-influenced-by-the-selective-pressure-of-anticoagulant-rodenticides
#2
Joffrey Goulois, Véronique Lambert, Lionel Legros, Etienne Benoit, Virginie Lattard
Anticoagulant rodenticides are commonly used to control rodent pests worldwide. They specifically inhibit the vitamin K epoxide reductase (VKORC1), which is an enzyme encoded by the Vkorc1 gene, involved in the recycling of vitamin K. Therefore, they prevent blood clotting. Numerous mutations of Vkorc1 gene were reported in rodents, and some are involved in the resistant to rodenticides phenotype. Two hundred and sixty-six mice tails were received from 65 different locations in France. Coding sequences of Vkorc1 gene were sequenced in order to detect mutations...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28428756/neck-circumference-is-associated-with-muscle-sympathetic-nerve-activity-in-overweight-and-obese-men-but-not-women
#3
Nora E Straznicky, Mariee T Grima, Carolina I Sari, Nina Eikelis, Paul J Nestel, John B Dixon, Gavin W Lambert, Markus P Schlaich, Sarah E Phillips, Elisabeth A Lambert
Background: Neck circumference (NC) is a predictor of cardiometabolic risk. The objective of this study was to explore the relationship of NC to muscle sympathetic nerve activity (MSNA) within an overweight and obese population. Methods: The study design was a retrospective cross-sectional analysis. Un-medicated persons (72 men, 53 postmenopausal women) aged 56 ± 1 years (mean ± SEM) with body mass index (BMI) 32.8 ± 0.4 kg/m(2), were studied. NC was measured together with traditional anthropometric measures, supine blood pressure, fasting blood lipids, insulin, and glucose...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28425929/contradictions-and-promise-for-end-of-life-communication-among-family-and-friends-death-over-dinner-conversations
#4
Andrea Lambert South, Jessica Elton
The free, open-access website called "Let's Get Together and Talk about Death", or Death over Dinner (DoD), provides resources for initiating end-of-life conversations with family and friends by taking the frightening-talking about death-and transforming it into the familiar-a conversation over dinner. This qualitative, descriptive study uses grounded theory and thematic analysis to answer the following research question: How do friend and family groups communicate about death and dying in DoD conversations? To answer this question, 52 dinner groups were recruited and conversations were conducted, which consisted of a facilitator and volunteers...
April 20, 2017: Behavioral Sciences
https://www.readbyqxmd.com/read/28423991/changes-in-body-mass-stature-and-bmi-in-south-african-elite-u18-rugby-players-from-different-racial-groups-from-2002-2012
#5
Justin Durandt, Mervin Green, Herman Masimla, Mike Lambert
The purpose of this study was to determine whether there are differences between racial groups for body mass, stature and body mass index (BMI) in South African elite U18 rugby players and whether there were significant changes in these measurements between 2002 and 2012. Self-reported body mass and stature were obtained from U18 players (n = 4007) who attended the national tournament during this period. BMI was calculated for each player.White players were 9.8 kg heavier than black players, who were 2.3 kg heavier than coloured players (P < 0...
April 20, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28423272/distinguishing-lead-and-molecule-states-in-graphene-based-single-electron-transistors
#6
Pascal Gehring, Jakub K Sowa, Jonathan Cremers, Qingqing Wu, Hatef Sadeghi, Yuewen Sheng, Jamie H Warner, Colin J Lambert, G Andrew D Briggs, Jan A Mol
Graphene provides a two-dimensional platform for contacting individual molecules, which enables transport spectroscopy of molecular orbital, spin and vibrational states. Here we report single-electron tunneling through a molecule that has been anchored to two graphene leads. Quantum interference within the graphene leads gives rise to an energy-dependent transmission and fluctuations in the sequential tunnel-rates. The lead states are electrostatically tuned by a global back-gate, resulting in a distinct pattern of varying intensity in the measured conductance maps...
April 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28422523/can-the-lamberts-submaximal-cycle-test-reflect-overreaching-in-professional-cyclists
#7
Lieselot Decroix, Robert P Lamberts, Romain Meeusen
PURPOSE: The Lamberts and Lambert Submaximal Cycle Test (LSCT) consists of 3 stages during which cyclist's cycle for 6 minutes at 60%, 6 minutes at 80% and 3 minutes at 90% of their maximal heart rate, followed by one-minute recovery. It was the aim of this study to determine if the LSCT is able to reflect a state of functional overreaching in professional female cyclists during an 8-day training camp and the following recovery days. METHODS: Six professional female cyclists performed an LSCT on day 1, day 5 and day 8 of the training camp and 3 days after the training camp...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28420711/excitatory-neurons-sculpt-gabaergic-neuronal-connectivity-in-the-c-elegans-motor-circuit
#8
Belinda Barbagallo, Alison Philbrook, Denis Touroutine, Navonil Banerjee, Devyn Oliver, Christopher M Lambert, Michael M Francis
Establishing and maintaining the appropriate number of GABA synapses is key for balancing excitation and inhibition in the nervous system, though we have only a limited understanding of the mechanisms controlling GABA circuit connectivity. Here, we show that disrupting cholinergic innervation of GABAergic neurons in the C. elegans motor circuit alters GABAergic neuron synaptic connectivity. These changes are accompanied by a reduced frequency and increased amplitude of GABAergic synaptic events. Acute genetic disruption in early development-during the integration of post-embryonic born GABAergic neurons into the circuit-produces irreversible effects on GABAergic synaptic connectivity that mimic those produced by chronic manipulations...
April 18, 2017: Development
https://www.readbyqxmd.com/read/28420644/smokers-and-postcessation-weight-gain-after-acute-coronary-syndrome
#9
Payam Dehghani, Bettina Habib, Sarah B Windle, Nathalie Roy, Wayne Old, François R Grondin, Iqbal Bata, Ayman Iskander, Claude Lauzon, Nalin Srivastava, Adam Clarke, Daniel Cassavar, Danielle Dion, Herbert Haught, Shamir R Mehta, Jean-François Baril, Charles Lambert, Mina Madan, Beth L Abramson, Mark J Eisenberg
BACKGROUND: Smoking cessation and weight management are recommended after acute coronary syndrome (ACS); however, little is known about the effects of smoking cessation on weight change after ACS. We aimed to assess the effect of smoking cessation after ACS on weight over a 12-month follow-up period. METHODS AND RESULTS: Data were prospectively collected from the EVITA (Evaluation of Varenicline in Smoking Cessation for Patients Post-Acute Coronary Syndrome) trial...
April 18, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28419267/a-national-survey-assessing-the-number-of-records-allowed-open-in-electronic-health-records-at-hospitals-and-ambulatory-sites
#10
Jason S Adelman, Matthew A Berger, Amisha Rai, William L Galanter, Bruce L Lambert, Gordon D Schiff, David K Vawdrey, Robert A Green, Hojjat Salmasian, Ross Koppel, Clyde B Schechter, Jo R Applebaum, William N Southern
To reduce the risk of wrong-patient errors, safety experts recommend limiting the number of patient records providers can open at once in electronic health records (EHRs). However, it is unknown whether health care organizations follow this recommendation or what rationales drive their decisions. To address this gap, we conducted an electronic survey via 2 national listservs. Among 167 inpatient and outpatient study facilities using EHR systems designed to open multiple records at once, 44.3% were configured to allow ≥3 records open at once (unrestricted), 38...
April 17, 2017: Journal of the American Medical Informatics Association: JAMIA
https://www.readbyqxmd.com/read/28419252/sensitive-determination-of-cannabinoids-in-whole-blood-by-lc-ms-ms-after-rapid-removal-of-phospholipids-by-filtration
#11
Lambert K Sørensen, Jørgen B Hasselstrøm
Direct analysis of Δ9-tetrahydrocannabinol (THC) and other cannabinoids in crude acetonitrile extracts of whole blood by liquid chromatography-tandem mass spectrometry using pneumatically assisted electrospray ionization (LC-ESI-MS-MS) was subjected to pronounced ion suppression from co-eluting phospholipids (PLs). The interferences were mainly caused by the lysophosphatidylcholine and lysophosphatidylethanolamine classes of PLs. The PLs were easily removed from crude extracts by filtration through a sorbent with Lewis acid properties, which typically increased the THC and cannabinol (CBN) signal intensities by a factor of 5...
April 17, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28418789/transitions-and-motivations-for-substance-misuse-in-prison-inmates-with-adhd-and-conduct-disorder-validation-of-a-new-instrument
#12
Susan Young, Rafael A González, Kim Wolff, Laura Mutch, Isabella Malet-Lambert, Gisli H Gudjonsson
OBJECTIVE: There is a reasonable theoretical base for understanding the possible causes and motivations behind substance misuse and its dependency. There is a need for a reliable and valid measure that delineates the markers of substance use from its initiation and identifies different motivations for drug use transitioning, maintenance, and dependency. We addressed this gap in the United Kingdom by examining and validating the Substance Transitions in Addiction Rating Scale (STARS). METHODS: For this review, 390 male prisoners were screened for conduct disorder and assessed with a clinical diagnostic interview for attention deficit/hyperactivity disorder (ADHD)...
April 18, 2017: Journal of Dual Diagnosis
https://www.readbyqxmd.com/read/28417858/-18-f-fdg-pet-ct-imaging-of-thoracic-and-extrathoracic-tuberculosis-in-children
#13
REVIEW
Matthieu Pelletier-Galarneau, Patrick Martineau, Lionel S Zuckier, Xuan Pham, Raymond Lambert, Sophie Turpin
Tuberculosis (TB) remains a major health problem, affecting approximately one-third of the world׳s population. The tubercle bacillus can affect virtually any organ of the human body and if left untreated can lead to severe morbidity and death. Diagnosis of active TB is challenging, especially in children. As a "great imitator," the disease can mimic numerous other pathologies, both clinically and at imaging. Although recognition of active TB is crucial to initiate adequate treatment in a timely fashion, thereby preventing transmission of disease, differentiation of active and quiescent disease is not always straightforward...
May 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28417450/exploring-the-biological-activity-of-condensed-tannins-and-nutritional-value-of-tree-and-shrub-leaves-from-native-species-of-the-argentinean-dry-chaco
#14
E M García, N Cherry, B D Lambert, J P Muir, M A Nazareno, J I Arroquy
BACKGROUND: Tropical tree or shrub leaves are an important source of nutrients for ruminants and a potential source of biologically active compounds that may affect ruminal metabolism of nutrients. Therefore, eight woody species from the native flora of Argentinean Dry Chaco - rich in secondary compounds such as condensed tannins (CT), were assessed for their nutritional value, CT fractions, and in vitro true digestibility of dry matter as well as biological activity (BA). RESULTS: Differences among species were found in contents of total phenol, protein-precipitating phenols (PPP), bound proteins to PPP (BP) and BP/PPP (P<0...
April 18, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28417185/combined-preoperative-portal-and-hepatic-vein-embolization-biembolization-to-improve-liver-regeneration-before-major-liver-resection-a-preliminary-report
#15
Bertrand Le Roy, Antoine Perrey, Mikael Fontarensky, Johan Gagnière, Armand Abergel, Bruno Pereira, Celine Lambert, Louis Boyer, Denis Pezet, Pascal Chabrot, Emmanuel Buc
BACKGROUND: Insufficient volume of the future liver remnant (FLR) is a major cause of non-resectable disease in patients presenting with primary or metastatic liver tumours. The objective of this study was to evaluate the safety and efficacy of the combined preoperative portal and hepatic vein embolization (biembolization) before extended right liver resections. METHODS: This retrospective study was performed in a tertiary centre between 2014 and 2015. Combined right portal and hepatic vein embolization (biembolization) was proposed, as an alternative to ALPPS procedure, for all patients with primary or metastatic liver tumour, before right extended hepatectomy...
April 17, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28416890/relationship-between-perceived-exertion-during-exercise-and-subsequent-recovery-measurements
#16
T N Mann, R P Lamberts, A Nummela, M I Lambert
The return towards resting homeostasis in the post-exercise period has the potential to represent the internal training load of the preceding exercise bout. However, the relative potential of metabolic and autonomic recovery measurements in this role has not previously been established. Therefore the aim of this study was to investigate which of 4 recovery measurements was most closely associated with Borg's Rating of Perceived Exertion (RPE), a measurement widely acknowledged as an integrated measurement of the homeostatic stress of an exercise bout...
March 2017: Biology of Sport
https://www.readbyqxmd.com/read/28416506/clinical-updates-in-adult-immune-thrombocytopenia-itp
#17
Michele P Lambert, Terry B Gernsheimer
Immune Thrombocytopenia (ITP) occurs in 2-4:100,000 adults and results in variable bleeding symptoms and thrombocytopenia. In the last decade changes in our understanding of the pathophysiology of the disorder have led to publication of new guidelines for the diagnosis and management of ITP, and standards for terminology. Current evidence supports alternatives to splenectomy for second line management of patients with persistently low platelet counts and bleeding. Long-term follow up data suggest both efficacy and safety, in particular for the thrombopoietin receptor agonists (TPO-RA) and the occurrence of late remissions...
April 17, 2017: Blood
https://www.readbyqxmd.com/read/28415000/changes-in-copper-toxicity-towards-diatom-communities-with-experimental-warming
#18
Soizic Morin, Anne Sophie Lambert, Elena Planes Rodriguez, Aymeric Dabrin, Marina Coquery, Stephane Pesce
Biological communities in aquatic environments most commonly face multiple stress, where natural and anthropogenic stressors often act jointly. Their interactions are most easily assessed using short cycle organisms such as periphytic diatoms. In this experiment, we analyzed the combined effects of copper exposure and warming on diatom successions over 6 weeks. Natural biofilm collected in winter was left to grow in mesocosms exposed or unexposed to realistic Cu concentrations at four different temperatures...
April 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28414344/measurement-of-thickness-of-highly-inhomogeneous-crude-oil-slicks
#19
Surya Cheemalapati, Heather P Forth, Hao Wang, Karthik Raj Konnaiyan, Jeffrey M Morris, Anna L Pyayt
As part of the Deepwater Horizon toxicity testing program, a number of laboratories generated oil slicks in the laboratory to study potential toxic effects of these oil slicks on aquatic organisms. Understanding the details of how these slicks affect aquatic organisms requires careful correlation between slick thickness and the observed detrimental effects. Estimating oil film thickness on water can be challenging since the traditional color-based technique used in the field is very imprecise. Also, as we demonstrate here, the films formed on the water surface are highly nonuniform on a microscale level, and thus uniform thin film thickness measurement techniques based on optical interference do not work...
April 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28411328/dance-and-hometown-associations-are-promising-strategies-to-improve-physical-activity-participation-among-us-nigerian-transnational-immigrants
#20
Kelechi Ibe-Lamberts, Daudet Ilunga Tshiswaka, Ifeyinwa Onyenekwu, Andiara Schwingel, Juliet Iwelunmor
OBJECTIVE: Lack of physical activity participation has been identified as a determinant for negative health outcomes across various ethnicities worldwide and within the USA. We investigated the perceptions of the prospects of promoting dancing within hometown associations as a form for improving physical activity participation for Nigerian Transnational Immigrants (NTIs) in the USA: a migrant cohort subset of individuals who maintain cross-border ties with their indigenous communities of origin...
April 14, 2017: Journal of Racial and Ethnic Health Disparities
keyword
keyword
34724
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"