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https://www.readbyqxmd.com/read/28645015/mid-infrared-and-near-infrared-spectroscopy-for-rapid-detection-of-gardeniae-fructus-by-a-liquid-liquid-extraction-process
#1
Lingyan Tao, Zhonglin Lin, Jiashan Chen, Yongjiang Wu, Xuesong Liu
Gardeniae Fructus is widely used in the pharmaceutical industry, and many studies have confirmed its medical and economic value. In this study, samples collected from different liquid-liquid extraction batches of Gardeniae Fructus were detected by mid-infrared (MIR) and near-infrared (NIR) spectroscopy. Seven analytes, neochlorogenic acid (5-CQA), cryptochlorogenic acid (4-CQA), chlorogenic acid (3-CQA), geniposidic acid (GEA), deacetyl-asperulosidic acid methyl ester (DAAME), genipin-gentiobioside (GGB), and gardenoside (GA), were chosen as quality property indexes of Gardeniae Fructus...
June 16, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28644964/determination-of-absolute-material-nonlinearity-with-air-coupled-ultrasonic-receivers
#2
David Torello, Nicholas Selby, Jin-Yeon Kim, Jianmin Qu, Laurence J Jacobs
Quantitative evaluation of the microstructural state of a specimen can be deduced from knowledge of the sample's absolute acoustic nonlinearity parameter, β, making the measurement of β a powerful tool in the NDE toolbox. However, the various methods used in the past to measure β each suffer from significant limitations. Piezoelectric contact transducers are sensitive to nonlinear signals, cheap, and simple to use, but they are hindered by the variability of the interfacial contact between transducer and specimen surface...
June 3, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28644960/improved-simulation-based-hr-ebsd-procedure-using-image-gradient-based-dic-techniques
#3
Jon Alkorta, Matthieu Marteleur, Pascal J Jacques
Conventional HR-EBSD is attracting much interest due to its ability of measuring relative crystal misorientations and microstresses with great accuracy. However, this technique needs the use of simulated patterns in order to get absolute values of crystal orientation and stresses and thus expand its use to intergranular analyses. Simulation-based approaches have shown many limitations due to the poor correlation with the real patterns specially when Bragg simulations are considered. This paper presents an improved algorithm based on gradient-based correlation techniques that makes simulation-based HR-EBSD possible...
June 14, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28644820/investigation-of-real-tissue-water-equivalent-path-lengths-using-an-efficient-dose-extinction-method
#4
Rongxiao Zhang, Esther Baer, Kyung-Wook Jee, Gregory C Sharp, Jay Flanz, Hsiao-Ming Lu
For proton therapy, an accurate conversion of CT HU to relative stopping power (RSP) is essential. Validation of the conversion based on real tissue samples is more direct than the current practice solely based on tissue substitutes and can potentially address variations over the population. Based on a novel dose extinction method, we measured water equivalent path lengths (WEPL) on animal tissue samples to evaluate the accuracy of CT HU to RSP conversion and potential variations over a population. A broad proton beam delivered a spread out Bragg peak to the samples sandwiched between a water tank and a 2D ion-chamber detector...
June 23, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28644656/entanglement-enhanced-phase-estimation-without-prior-phase-information
#5
G Colangelo, F Martin Ciurana, G Puentes, M W Mitchell, R J Sewell
We study the generation of planar quantum squeezed (PQS) states by quantum nondemolition (QND) measurement of an ensemble of ^{87}Rb atoms with a Poisson distributed atom number. Precise calibration of the QND measurement allows us to infer the conditional covariance matrix describing the F_{y} and F_{z} components of the PQS states, revealing the dual squeezing characteristic of PQS states. PQS states have been proposed for single-shot phase estimation without prior knowledge of the likely values of the phase...
June 9, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28644527/an-audit-on-technical-quality-of-root-fillings-performed-by-undergraduate-students
#6
W Fong, O Heidarifar, S Killough, M Lappin, I A El Karim
AIM: To evaluate radiographically the technical quality of root fillings performed by undergraduate dental students and to assess whether students were exposed to an appropriate endodontic case mix during their clinical training. METHODOLOGY: A retrospective audit was undertaken evaluating the clinical records of patients who underwent endodontic procedures during the period from September 2015 to June 2016 in the Dental School at Queen's University Belfast, UK...
June 23, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28644005/from-electrochemistry-to-electroluminescence-development-and-application-in-ratiometric-aptasensor-for-aflatoxin-b1
#7
Long Wu, Fan Ding, Wenmin Yin, Jing Ma, Biru Wang, Axiu Nie, Heyou Han
Aflatoxin B1 (AFB1), one of the most toxic chemical carcinogens, has been widely studied. It remains challenging to develop simple, accurate and sensitive analytical methods for the detection of AFB1 in food matrices. In this work, based on dual-signaling strategy, a ratiometric aptasensor was designed and verified for the accurate and sensitive detection of AFB1. The electrochemical method was first used as a model to verify the specific interaction between AFB1 and the aptamer, in which ferrocene (Fc) and methylene blue (MB) anchored DNA sequences were acted as dual signals...
June 23, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28643923/micro-anatomical-responses-in-periodontal-complexes-of-mice-to-calibrated-orthodontic-forces-on-the-crown
#8
A Pal, L Chen, L Yang, F Yang, B Meng, A H Jheon, S P Ho
OBJECTIVE: Correlating mechanical forces with quantifiable physical changes in the dentoalveolar complex. SETTING AND SAMPLE POPULATION: Male 6-week C57BL/6 mice (N=3), micro X-ray-computed tomography; post-analysis software to extract physical changes in periodontal ligament (PDL)-space. MATERIALS AND METHODS: Silicone-elastic bands were placed between maxillary molars for 1 week, with the contralateral side as internal control. Average displacements between crowns and roots, and changes in PDL-spaces were evaluated by registering X-ray tomograms of experimental and control hemi-maxillae...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643922/speed-of-human-tooth-movement-in-growers-and-non-growers-selection-of-applied-stress-matters
#9
L R Iwasaki, Y Liu, H Liu, J C Nickel
OBJECTIVES: To test that the speed of tooth translation is not affected by stress magnitude and growth status. SETTING AND SAMPLE POPULATION: Advanced Education Orthodontic clinics at the Universities of Nebraska Medical Center and Missouri-Kansas City. Forty-six consenting subjects with orthodontic treatment plans involving maxillary first premolar extractions. MATERIALS AND METHODS: This randomized split-mouth study used segmental mechanics with definitive posterior anchorage and individual vertical-loop maxillary canine retraction appliances and measured three-dimensional tooth movements...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643919/mechanobehaviour-in-dolichofacial-and-brachyfacial-adolescents
#10
J C Nickel, A L Weber, P Covington Riddle, Y Liu, H Liu, L R Iwasaki
OBJECTIVES: To test whether mechanobehaviour (temporomandibular joint (TMJ) loads, jaw muscle use) was different between facial types and correlated with ramus height (Condylion-Gonion, mm). SETTING AND SAMPLE POPULATION: University of Missouri-Kansas City (UMKC) Orthodontic Clinic. Ten dolichofacial and ten brachyfacial adolescents (Sella-Nasion-Gonion-Gnathion (SN-GoGn) angles ≥37° and ≤27°, respectively) consented to participate. MATERIALS AND METHODS: Numerical models calculated TMJ loads for a range of static biting based on subjects' three-dimensional anatomy...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643310/-establishment-of-a-prognostic-nomogram-to-predict-long-term-survival-in-non-metastatic-colorectal-cancer-patients
#11
Xiaojie Wang, Pan Chi, Huiming Lin, Xingrong Lu, Ying Huang, Zongbin Xu, Shenghui Huang, Yanwu Sun, Daoxiong Ye
OBJECTIVE: To establish a nomogram to predict long-term survival in non-metastatic colorectal cancer patients. METHODS: A retrospective analysis was conducted in patients with non-metastatic colorectal cancer who underwent radical surgery in the Department of Colorectal Surgery of Affiliated Union Hospital of Fujian Medical University between January 2000 and December 2014. Univariate and multivariate analyses on disease-free survival (DFS) were performed using the Cox proportional regression model...
June 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28643132/integrated-inflammatory-stress-itis-model
#12
Elisabeth O Bangsgaard, Poul G Hjorth, Mette S Olufsen, Jesper Mehlsen, Johnny T Ottesen
During the last decade, there has been an increasing interest in the coupling between the acute inflammatory response and the Hypothalamic-Pituitary-Adrenal (HPA) axis. The inflammatory response is activated acutely by pathogen- or damage-related molecular patterns, whereas the HPA axis maintains a long-term level of the stress hormone cortisol which is also anti-inflammatory. A new integrated model of the interaction between these two subsystems of the inflammatory system is proposed and coined the integrated inflammatory stress (ITIS) model...
June 22, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28643117/children-s-family-experiences-development-of-the-promis-%C3%A2-pediatric-family-relationships-measures
#13
Katherine B Bevans, Anne W Riley, Jeanne M Landgraf, Adam C Carle, Rachel E Teneralli, Barbara H Fiese, Lisa J Meltzer, Anna K Ettinger, Brandon D Becker, Christopher B Forrest
PURPOSE: To describe the development of pediatric family relationships measures, with versions for child self-report (8-17 years) and parent-report for children 5-17 years old. Measures were created for integration into the Patient Reported Outcomes Measurement Information System (PROMIS(®)). METHODS: Semi-structured interviews with 10 experts, 24 children, and 8 parents were conducted to elicit and clarify essential elements of family relationships. A systematic literature review was conducted to identify item concepts representative of each element...
June 22, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28643031/pediatric-emergency-care-applied-research-network-pecarn-prediction-rules-in-identifying-high-risk-children-with-mild-traumatic-brain-injury
#14
B Nakhjavan-Shahraki, M Yousefifard, M J Hajighanbari, A Oraii, S Safari, M Hosseini
PURPOSE: Pediatric Emergency Care Applied Research Network (PECARN) traumatic brain injury (TBI) prognostic rules is a scoring system for prediction of the need for computed tomography (CT) scanning in children with mild TBI. However, its validation has not been assessed in developing countries. Therefore, the present study was designed to assess the value of PECARN rule in identification of children with clinically important TBI (ciTBI). METHOD: In this prospective cross-sectional study, 594 children (mean age: 7...
June 22, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/28642854/measurement-uncertainty-in-spine-bone-mineral-density-by-dual-energy-x-ray-absorptiometry
#15
Ae-Ja Park, Jun-Il Yoo, Jee-Hye Choi, Kyun Shik Chae, Chang Geun Kim, Dal Sik Kim
BACKGROUND: The purpose of this study was to calculate the measurement uncertainty of the process of bone mineral density (BMD) analysis using dual energy X-ray absorptiometry with traceability. METHODS: Between March 2015 and October 2016, among healthy participants in their 20s and 30s, the study included those who had not taken calcium, vitamin D supplements and steroids and were without a history of osteoporosis, osteopenia and diseases related to osteoporosis...
May 2017: Journal of Bone Metabolism
https://www.readbyqxmd.com/read/28642805/a-simple-method-for-hplc-retention-time-prediction-linear-calibration-using-two-reference-substances
#16
Lei Sun, Hong-Yu Jin, Run-Tao Tian, Ming-Juan Wang, Li-Na Liu, Liu-Ping Ye, Tian-Tian Zuo, Shuang-Cheng Ma
BACKGROUND: Analysis of related substances in pharmaceutical chemicals and multi-components in traditional Chinese medicines needs bulk of reference substances to identify the chromatographic peaks accurately. But the reference substances are costly. Thus, the relative retention (RR) method has been widely adopted in pharmacopoeias and literatures for characterizing HPLC behaviors of those reference substances unavailable. The problem is it is difficult to reproduce the RR on different columns due to the error between measured retention time (tR) and predicted tR in some cases...
2017: Chinese Medicine
https://www.readbyqxmd.com/read/28642499/comprehensive-analysis-and-reinterpretation-of-cenozoic-mesofossils-reveals-ancient-origin-of-the-snapping-claw-of-alpheid-shrimps
#17
Matúš Hyžný, Andreas Kroh, Alexander Ziegler, Arthur Anker, Martin Košťák, Ján Schlögl, Adam Culka, John W M Jagt, René H B Fraaije, Mathias Harzhauser, Barry W M van Bakel, Andrej Ruman
Alpheid snapping shrimps (Decapoda: Caridea: Alpheidae) constitute one of the model groups for inferences aimed at understanding the evolution of complex structural, behavioural, and ecological traits among benthic marine invertebrates. Despite being a super-diverse taxon with a broad geographical distribution, the alpheid fossil record is still poorly known. However, data presented herein show that the strongly calcified fingertips of alpheid snapping claws are not uncommon in the fossil record and should be considered a novel type of mesofossil...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642433/quantum-correlations-from-a-room-temperature-optomechanical-cavity
#18
T P Purdy, K E Grutter, K Srinivasan, J M Taylor
The act of position measurement alters the motion of an object being measured. This quantum measurement backaction is typically much smaller than the thermal motion of a room-temperature object and thus difficult to observe. By shining laser light through a nanomechanical beam, we measure the beam's thermally driven vibrations and perturb its motion with optical force fluctuations at a level dictated by the Heisenberg measurement-disturbance uncertainty relation. We demonstrate a cross-correlation technique to distinguish optically driven motion from thermally driven motion, observing this quantum backaction signature up to room temperature...
June 23, 2017: Science
https://www.readbyqxmd.com/read/28642329/experimental-and-computational-insight-into-human-mesenchymal-stem-cell-paracrine-signaling-and-heterocellular-coupling-effects-on-cardiac-contractility-and-arrhythmogenicity
#19
Joshua Mayourian, Timothy J Cashman, Delaine K Ceholski, Bryce V Johnson, David Sachs, Deepak A Kaji, Susmita Sahoo, Joshua M Hare, Roger J Hajjar, Eric A Sobie, Kevin D Costa
Rationale: Myocardial delivery of human mesenchymal stem cells (hMSCs) is an emerging therapy for treating the failing heart. However, the relative effects of hMSC-mediated heterocellular coupling (HC) and paracrine signaling (PS) on human cardiac contractility and arrhythmogenicity remain unresolved. Objective: To better understand hMSC PS and HC effects on human cardiac contractility and arrhythmogenicity by integrating experimental and computational approaches. Methods and Results: : Extending our previous hMSC-cardiomyocyte HC computational model, we incorporated experimentally calibrated hMSC PS effects on cardiomyocyte L-type calcium channel/SERCA activity and cardiac tissue fibrosis...
June 22, 2017: Circulation Research
https://www.readbyqxmd.com/read/28642039/development-and-validation-of-a-screening-instrument-to-identify-cardiometabolic-predictors-of-mortality-in-older-individuals-with-cancer-secondary-analysis-of-the-australian-longitudinal-study-of-ageing-alsa
#20
Ethel Lim, Michelle Miller, Billingsley Kaambwa, Bogda Koczwara
OBJECTIVE: The objective of this study was to identify significant cardiometabolic predictors of mortality among older cancer survivors and develop and validate a screening instrument to assess individual risk of mortality. MATERIALS AND METHODS: Retrospective cohort study used collected data from the ALSA. Cox proportional hazards model was used to derive the risk equation for mortality that could be evaluated at 10years. Measures of discrimination and calibration were calculated in the validation cohort...
June 19, 2017: Journal of Geriatric Oncology
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