Read by QxMD icon Read

Light quality

Ya-Dan Wang, Zhong Dai, Cai-Lin Sun, Xian-Fu Wu, Shuang-Cheng Ma
Ultra-performance liquid chromatography-evaporative light scattering detection (UPLC-ELSD) fingerprint analysis method was established for quality control of Guci tablets. Chromatographic separation was performed on Waters Acquity UPLC BEH C₁₈ column (2.1 mm×100 mm, 1.7 μm) at 30 °C of column temperature. Acetonitrile-0.1% formic acid solution was adopted as mobile phase for gradient elution. The flow rate was set at 0.3 mL·min⁻¹, and the injection volume was 3 μL. Detection was carried out on an ELSD with a nitrogen pressure of 0...
March 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Qi-Qiang Guo, Chao Gao, Hui-E Li, Yan-Hui Ye, Yan-Ying Han
This study was carried out by the methods of typical plots investigation and laboratory test aiming at analyzing the survival state and fruiting characteristics of three Sinopodophyllum hexandrum populations in different environmental habitats. Meanwhile, it could provide scientific basis for enhancing wild population quantity recovery. The results showed that more population quantity grow in the habitats of large-area gap (Population A) and bushes (Population C) with a majority of the young individuals, while the minor-area gap (Population B) was the opposite...
March 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Yu-Feng Chen, Xu-Feng Huang, Rui Gu, Shi-Hong Zhong, Xiao-Dong Wei
This article is aimed to study the response mechanism of Acanthopanax giraldii on different shading intensity to guide its artificial cultivation. The cultivated A. giraldii in Maoxian was used as the research object, set up different shading treatment groups, analyzed photosynthesis, physiology, submicroscopic structure to explore the response mechanism of A. giraldii to different light intensity. Light was the main influencing factor to photosynthetic rate.During morning and afternoon periods,the Pn of the CK group reduced by stomatal limitation and non stomatal limitation factors respectively...
March 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Aurélia Pernin, Florence Dubois-Brissonnet, Stéphanie Roux, Marine Masson, Véronique Bosc, Marie-Noëlle Maillard
BACKGROUND: Phenolic compounds present a potential solution to ensuring food quality and safety. Indeed, they can limit oxidation reactions and bacterial growth in food products. Although their antioxidant mechanisms of action are well known, their antibacterial ones are less well understood, especially in light of their chemical structures. The aim of this study was to first quantify both aspects of a series of natural phenolic compounds and then link these activities to their chemical structure...
April 20, 2018: Journal of the Science of Food and Agriculture
Claire H Sandoe, William Kingston
PURPOSE OF REVIEW: Exercise headache refers to headache that is triggered by exercise or exertion. Although secondary causes must be excluded, most cases of exercise headache are benign, idiopathic, and self-limited. This article reviews the revised diagnostic criteria for primary exercise headache (PEH) and discusses recent research into the clinical presentation, epidemiology, pathophysiology, suggested workup, and treatment of this condition. RECENT FINDINGS: Recent studies estimate that PEH affects from 1 to 26% of the adult population...
April 19, 2018: Current Neurology and Neuroscience Reports
Lucía Botella, Filip Stankovikj, José L Sánchez, Alberto Gonzalo, Jesús Arauzo, Manuel Garcia-Pérez
The major challenge for the pyrolytic conversion of lignocellulosic materials into crude bio-oil is the poor quality of the final product. Several strategies (addition of solvents, production of emulsions, and extraction with biodiesel) have been studied to improve its fuel properties. The extraction with biodiesel is an interesting solution because it allows direct utilization of some bio-oil fractions as fuels. However, fraction extracted with biodiesel is typically between 10 and 18 wt. %. In this paper we studied mild hydrotreatment of pyrolysis oil to enhance its solubility in biodiesel...
2018: Frontiers in Chemistry
Shau Poh Chong, Tingwei Zhang, Aaron Kho, Marcel T Bernucci, Alfredo Dubra, Vivek J Srinivasan
Chromatic aberrations are an important design consideration in high resolution, high bandwidth, refractive imaging systems that use visible light. Here, we present a fiber-based spectral/Fourier domain, visible light OCT ophthalmoscope corrected for the average longitudinal chromatic aberration (LCA) of the human eye. Analysis of complex speckles from in vivo retinal images showed that achromatization resulted in a speckle autocorrelation function that was ~20% narrower in the axial direction, but unchanged in the transverse direction...
April 1, 2018: Biomedical Optics Express
Tomasz Jurczak, Adrianna Wojtal-Frankiewicz, Zbigniew Kaczkowski, Zuzanna Oleksińska, Agnieszka Bednarek, Maciej Zalewski
The Bzura-7 pond (Łódź, Poland) is a typical shallow and shady urban reservoir situated on the Bzura River that is exposed to pollutants introduced mainly by internal loads and the supply from the catchment. In 2010-2012, the following characteristics were observed in the pond: a high allochthonous input of organic matter, high concentration of ammonium, low concentration of dissolved oxygen and low diversity of zooplankton, dominated mainly by Daphnia spp. From January to June 2013, restoration measures were performed, including sediment removal, increasing light access to the pond and construction of a sequential sedimentation-biofiltration system (SSBS)...
April 16, 2018: Journal of Environmental Management
Robin Tahmosybayat, Katherine Baker, Alan Godfrey, Nick Caplan, Gill Barry
One in three older adults fall annually, in part due to impairments in the physiological systems that make up the postural control (PC) system. Exercise, particularly balance training, helps to prevent deterioration and even to improve outcomes in the PC system. Exergaming (exercise-gaming) is interactive computer gaming whereby an individual moves the body in response to onscreen cues in a playful format. Exergaming is an alternative method to standard practice for improving PC outcomes, which has been shown to reduce the risk of falling...
May 2018: Maturitas
Nazli Namazi, Pardis Irandoost, Bagher Larijani, Leila Azadbakht
Clinical trials have indicated conflicting results on the effects of conjugated linoleic acid (CLA) on obesity. The present study aimed to systematically review controlled clinical trials examining the effects of CLA on anthropometric indices and body composition in overweight and obese subjects. Pubmed, Scopus, Web of science, and Cochrane databases were searched between 2000 and December 2017 with no language restriction. Placebo-controlled clinical trials that reported anthropometric indices and body composition in overweight and obese subjects were included...
April 19, 2018: Critical Reviews in Food Science and Nutrition
Jianghong Wu, Zhenwei Yang, Caiyu Qiu, Yuejiao Zhang, Zhiqian Wu, Jingliang Yang, Yanghua Lu, Jianfeng Li, Dongxiao Yang, Ran Hao, Erping Li, Geliang Yu, Shisheng Lin
Near-infrared photodetectors (NIRPDs) have attracted great attention because of their wide range of applications in many fields. Herein, a novel self-driven NIRPD at the wavelength of 980 nm is reported based on the graphene/GaAs heterostructure. Extraordinarily, its sensitivity to light illumination (980 nm) is far beyond the absorption limitation of GaAs (874 nm). This means that the photocurrent originates from the separation of photo-induced carriers in graphene, which is caused by the vertically built-in electric field formed through the high quality van der Waals contact between graphene and GaAs...
April 19, 2018: Nanoscale
A L Geng, Y Zhang, J Zhang, H H Wang, Q Chu, H G Liu
The paper aimed to study the effects of lighting pattern and photoperiod alone and in combination on egg production, egg quality in Beijing You Chicken (BYC). A total of 630 19-wk-old BYC laying hens were randomly allocated to 6 groups with 105 birds each, 3 replicates per group, reared in individually lit floor pens with separate outdoor areas. A 2 × 3 factorial experiment (2 lighting patterns: continuous and intermittent lighting; 3 photoperiods: 16, 14, 12 h) was arranged, including 16L:8D (6:00 to 22:00) for group 1; 12L:2D:4L:6D (6:00 to 18:00, 20:00 to 24:00) for group 2; 14L:10D (6:00 to 20:00) for group 3; 10L:2D:4L:8D (6:00 to 16:00, 18:00 to 22:00) for group 4; 12L:12D (6:00 to 18:00) for group 5, and 8L:4D:4L:8D (6:00 to 14:00, 18:00 to 22:00) for group 6, respectively...
April 14, 2018: Poultry Science
Teresa Araújo, Ana Maria Mendonça, Aurélio Campilho
BACKGROUND: Changes in the retinal vessel caliber are associated with a variety of major diseases, namely diabetes, hypertension and atherosclerosis. The clinical assessment of these changes in fundus images is tiresome and prone to errors and thus automatic methods are desirable for objective and precise caliber measurement. However, the variability of blood vessel appearance, image quality and resolution make the development of these tools a non-trivial task. METHOLODOGY: A method for the estimation of vessel caliber in eye fundus images via vessel cross-sectional intensity profile model fitting is herein proposed...
2018: PloS One
Carolin Sehlbach, Marjan J Govaerts, Sharon Mitchell, Gernot G U Rohde, Frank W J M Smeenk, Erik W Driessen
OBJECTIVES: With increased cross-border movement, ensuring safe and high-quality healthcare has gained primacy. The purpose of recertification is to ensure quality of care through periodically attesting doctors' professional proficiency in their field. Professional migration and facilitated cross-border recognition of qualifications, however, make us question the fitness of national policies for safeguarding patient care and the international accountability of doctors. DESIGN AND SETTING: We performed document analyses and conducted 19 semistructured interviews to identify and describe key characteristics and effective components of 10 different European recertification systems, each representing one case (collective case study)...
April 17, 2018: BMJ Open
Christina Daskalopoulou, Brendon Stubbs, Carolina Kralj, Artemis Koukounari, Martin Prince, A Matthew Prina
OBJECTIVES: The number of older people is growing across the world; however, quantitative synthesis of studies examining the impact of lifestyle factors on the ageing process is rare. We conducted a systematic review and meta-analysis of longitudinal studies to synthesise the associations of smoking and alcohol consumption with healthy ageing (HA). METHODS: Major electronic databases were searched from inception to March 2017 (prospectively registered systematic reviews registration number CRD42016038130)...
April 17, 2018: BMJ Open
Bilel Hadrich, Ismahen Akremi, Mouna Dammak, Mohamed Barkallah, Imen Fendri, Slim Abdelkafi
BACKGROUND: Three steps are very important in order to produce microalgal lipids: (1) controlling microalgae cultivation via experimental and modeling investigations, (2) optimizing culture conditions to maximize lipids production and to determine the fatty acid profile the most appropriate for biodiesel synthesis, and (3) optimizing the extraction of the lipids accumulated in the microalgal cells. METHODS: Firstly, three kinetics models, namely logistic, logistic-with-lag and modified Gompertz, were tested to fit the experimental kinetics of the Chlorella sp...
April 17, 2018: Lipids in Health and Disease
R Krishnasamy, C M Hawley, M J Jardine, M A Roberts, Y J Cho, M G Wong, A Heath, C L Nelson, S Sen, P F Mount, E M Pascoe, D Darssan, L A Vergara, P A Paul-Brent, N D Toussaint, D W Johnson, C A Hutchison
BACKGROUND: Removal of uraemic toxins is inadequate using current dialysis strategies. A new class of dialysis membranes have been developed that allow clearance of larger middle molecules. The REMOVAL-HD study (a tRial Evaluating Mid cut-Off Value membrane clearance of Albumin and Light chains in HaemoDialysis patients) will address safety, efficacy and the impact on patient-centred outcomes with the use of a mid cut-off (MCO) dialyser in a chronic haemodialysis (HD) population. METHODS: REMOVAL-HD is an open label, prospective, non-randomised, single-arm, multi-centre device study in 85 chronic HD participants...
April 17, 2018: BMC Nephrology
Egle Paskeviciute, Bernadeta Zudyte, Zivile Luksiene
The aim of this study is to evaluate the antimicrobial efficiency of Chlorophyllin-based photosensitization for microbial control of cherry tomatoes. Chlorophyllin-based photosensitization (1.5 × 10-4  M, 3 J/cm2 ) significantly (2.4 log) reduced the population of naturally distributed surface attached various mesophilic bacteria (microbiota) on tomatoes. Moreover, the population of thermoresistant strains of food pathogens Bacillus cereus and Listeria monocytogenes inoculated on tomatoes was reduced by 1...
April 11, 2018: Journal of Photochemistry and Photobiology. B, Biology
Yun Shen, Jun-Ying Huang, Jie Li, Chun-Feng Liu
Objective: Excessive daytime sleepiness (EDS) is one of the most common sleep abnormalities in patients with Parkinson's disease (PD), yet its multifactorial etiology complicates its treatment. This review summarized recent studies on the epidemiology, etiology, clinical implications, associated features, and evaluation of EDS in PD. The efficacy of pharmacologic and non-pharmacologic treatments for EDS in PD was also reviewed. Data Sources: English language articles indexed in PubMed and Cochrane databases and Chinese-language papers indexed in Wanfang and National Knowledge Infrastructure databases that were published between January 1987 and November 2017 were located using the following search terms: "sleepiness", "sleep and Parkinson's disease", and "Parkinson's disease and treatment"...
April 20, 2018: Chinese Medical Journal
Masato Tsuneda, Teiji Nishio, Akito Saito, Sodai Tanaka, Tatsuhiko Suzuki, Daisuke Kawahara, Keiichiro Matsushita, Aya Nishio, Shuichi Ozawa, Kumiko Karasawa, Yasushi Nagata
PURPOSE: High accuracy of the beam-irradiated position is required for high-precision radiation therapy such as stereotactic body radiation therapy (SBRT), volumetric modulated arc therapy (VMAT) and intensity modulated radiation therapy (IMRT). Users generally perform the verification of the mechanical and radiation isocenters using the star shot test and the Winston Lutz test that allow evaluation of the displacement at the isocenter. However, these methods are unable to evaluate directly and quantitatively the sagging angle that is caused by the weight of the gantry itself along the gantry rotation axis...
April 16, 2018: Medical Physics
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"