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https://www.readbyqxmd.com/read/29778878/structural-elucidation-of-lignin-carbohydrate-complexes-lccs-from-chinese-quince-chaenomeles-sinensis-fruit
#1
Zhao Qin, Yu-Xiang Ma, Hua-Min Liu, Guang-Yong Qin, Xue-De Wang
The lignin-carbohydrate complexes (LCC) of the mesocarp (MS) and near the endocarp (NE) of Chinese quince (Chaenomeles sinensis) fruits were analyzed using three different methods of fractioning: milled wood lignin (MWL), LCC extracted from crude MWL with acetic acid (LCC-AcOH), and Bjorkman LCC. The MWL and LCC fractions were characterized by carbohydrate composition analysis, SEC, FT-IR, Py-GC/MS, thermal analysis and 2D HSQC NMR. Notably, large amounts of arabinose and galactose remained in the Björkman LCC fractions suggesting a chemical bond between the lignin and pectin...
May 17, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29778658/marijuana-and-lung-disease
#2
REVIEW
Donald P Tashkin
As marijuana smoking prevalence increases in the U.S. concern regarding its potential risks to lung health has also risen, given the general similarity in the smoke contents between marijuana and tobacco. Most studies have found a significant association between marijuana smoking and chronic bronchitis symptoms after adjustment for tobacco. While reports are mixed regarding associations between marijuana smoking and lung function, none has shown a relationship to decrements in forced expired volume in 1 sec (FEV1) and few have found a relationship to a decreased ratio of FEV1 to forced vital capacity (FVC), possibly related to an association between marijuana and an increased FVC...
May 17, 2018: Chest
https://www.readbyqxmd.com/read/29778447/analysis-of-hydrophobically-modified-ethylene-oxide-urethane-rheology-modifiers-by-comprehensive-two-dimensional-liquid-chromatography
#3
Peilin Yang, Lu Bai, Wenqin Wang, John Rabasco
Hydrophobically modified ethylene oxide urethane (HEUR) rheology modifiers are polymers used widely in waterborne coatings and other consumer products. The incorporation of hydrophobic end-groups significantly affects the thickening performance of HEURs. Therefore, understanding the degree of incorporation of hydrophobic end-groups on the polymer chain can help gain important insights on the structure/property relationship for HEUR rheology modifiers. A comprehensive two-dimensional liquid chromatography (2D-LC) method was developed for separating polymeric HEUR rheology modifiers based on the number of hydrophobic end-groups incorporated on the polymer chain...
May 16, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29778239/time-dependent-changes-in-cardiorespiratory-functions-of-anesthetized-rats-exposed-to-sustained-hypoxia
#4
Kouki Kato, Ryosuke Morinaga, Seigo Fushuku, Nobuaki Nakamuta, Yoshio Yamamoto
Although cardiovascular responses may be altered by respiratory changes under prolonged hypoxia, the relationship between respiratory and cardiovascular changes remains unknown. The aim of the present study is to clarify cardiorespiratory changes in anesthetized rats during and after hypoxic conditions using simultaneous recordings of cardiorespiratory variables with 20-sec recording intervals. After air breathing for 20 min (pre-exposure period), rats were subjected to 10% O2 for 2 h (hypoxic exposure period) and then air for 30 min (recovery period)...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29777748/a-brief-practical-review-of-size-exclusion-chromatography-rules-of-thumb-limitations-and-troubleshooting
#5
REVIEW
Richard R Burgess
Through years of research, teaching, troubleshooting, and editing, I have developed a solid working understanding of many aspects of protein purification and protein biochemistry. I have also found that many researchers do not understand the basics, let alone the pitfalls, of the techniques they use. In the case of size exclusion chromatography (SEC), I summarize below some of the rules of thumb, suggestions, limitations and troubleshooting I have found most useful in helping my students and colleagues carry out successful SEC...
May 16, 2018: Protein Expression and Purification
https://www.readbyqxmd.com/read/29777548/higher-contact-force-during-radiofrequency-ablation-leads-to-a-much-larger-increase-in-edema-as-compared-to-chronic-lesion-size
#6
Samuel Thomas, Josh Silvernagel, Nathan Angel, Eugene Kholmovski, Elyar Ghafoori, Nan Hu, John Ashton, Derek J Dosdall, Rob MacLeod, Ravi Ranjan
INTRODUCTION: Reversible edema is a part of any radiofrequency ablation but its relationship with contact force is unknown. The goal of this study was to characterize through histology and MRI, acute and chronic ablation lesions and reversible edema with contact force. METHODS AND RESULTS: In a canine model (n = 14), chronic ventricular lesions were created with a 3.5 mm tip ThermoCool SmartTouch (Biosense Webster) catheter at 25W or 40W for 30 sec. Repeat ablation was performed after 3 months to create a second set of lesions (acute)...
May 18, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29777193/on-spiking-behaviour-of-oyster-fungi-pleurotus-djamor
#7
Andrew Adamatzky
We recorded extra-cellular electrical potential of fruit bodies of oyster fungi Pleurotus djamor. We demonstrated that the fungi generate action potential like impulses of electrical potential. Trains of the spikes are observed. Two types of spiking activity are uncovered: high-frequency (period 2.6 min) and low-frequency (period 14 min); transitions between modes of spiking are illustrated. An electrical response of fruit bodies to short (5 sec) and long (60 sec) thermal stimulation with open flame is analysed in details...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29777140/different-responses-of-left-atrium-and-left-atrial-appendage-to-radiofrequency-catheter-ablation-of-atrial-fibrillation-a-follow-up-mri-study
#8
Yun Gi Kim, Jaemin Shim, Suk-Kyu Oh, Hee-Soon Park, Kwang-No Lee, Sung Ho Hwang, Jong-Il Choi, Young-Hoon Kim
Atrial fibrillation (AF) is known to cause adverse remodeling of left atrium (LA). Radiofrequency catheter ablation (RFCA) of AF is associated with decrease in LA volume. However, the impact of RFCA on left atrial appendage (LAA) volume and hemodynamic function is not fully understood. We analyzed 123 patients who underwent cardiac magnetic resonance imaging (MRI) evaluation before and after RFCA in Korea University Anam Hospital. LA and LAA volume were measured before and after RFCA based on cardiac MRI. Baseline LA volume was 99...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29775800/insertion-and-presence-of-fine-wire-intramuscular-electrodes-to-the-lumbar-paraspinal-muscles-do-not-affect-muscle-performance-and-activation-during-high-exertion-spinal-extension-activities
#9
Szu-Ping Lee, Jo Armour Smith, Matthew Kimber, Kelsey Houk
BACKGROUND: Low back pain (LBP) is commonly associated with paraspinal muscle dysfunctions. A method to study deep lumbar paraspinal (i.e. multifidus) muscle function and neuromuscular activation pattern is intramuscular electromyography (EMG). Previous studies have shown that the procedure does not significantly impact muscle function during activities involving low-level muscle contractions. However, it is currently unknown how muscular function and activation are affected during high-exertion contractions...
May 15, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29775553/influence-of-photobiomodulation-therapy-on-gingivitis-induced-by-multi-bracket-appliances-a-split-mouth-randomized-controlled-trial
#10
Steffen Stein, Michael Schauseil, Andreas Hellak, Heike Korbmacher-Steiner, Andreas Braun
OBJECTIVE: The objective of this split-mouth trial was to investigate the influence of photobiomodulation therapy (PBMT) on adjuvant treatment of gingivitis induced by multi-bracket appliances, after bracket debonding and professional tooth cleaning. MATERIALS AND METHODS: Thirteen patients (mean age 16.15 years; standard deviation ±2.12 years) who had completed active orthodontic treatment with fixed orthodontic appliances in an orthodontic clinic were included on a randomized basis...
May 18, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29773892/metabolite-cycled-density-weighted-concentric-rings-k-space-trajectory-dw-crt-enables-high-resolution-1-h-magnetic-resonance-spectroscopic-imaging-at-3-tesla
#11
Adam Steel, Mark Chiew, Peter Jezzard, Natalie L Voets, Puneet Plaha, Michael Albert Thomas, Charlotte J Stagg, Uzay E Emir
Magnetic resonance spectroscopic imaging (MRSI) is a promising technique in both experimental and clinical settings. However, to date, MRSI has been hampered by prohibitively long acquisition times and artifacts caused by subject motion and hardware-related frequency drift. In the present study, we demonstrate that density weighted concentric ring trajectory (DW-CRT) k-space sampling in combination with semi-LASER excitation and metabolite-cycling enables high-resolution MRSI data to be rapidly acquired at 3 Tesla...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773394/grafting-of-steroids-to-hyaluronan-towards-the-design-of-delivery-systems-for-antioxidants-the-role-of-hydrophobic-core
#12
Gloria Huerta-Ángeles, Martina Brandejsová, Jaroslav Novotný, Kateřina Kopecká, Jana Šógorková, Daniela Šmejkalová, Vladimír Velebný
In this work, amphiphilic hyaluronic acid (HA) was synthesized by the chemical bonding of steroids. Particularly, succinyl cholesterol (SCH), cholic acid (CA), deoxycholic acid (DOCA), and 18β-glycyrrhetinic acid (GA) were activated by benzoyl chloride towards the esterification reaction of HA in water. The degree of substitution can be controlled by varying the feed ratio of mixed anhydride to HA and up to 25% (mol/mol) can be obtained. Due to mild reaction conditions, no degradation of the polysaccharide was observed...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29772067/dna-content-analysis-of-colorectal-serrated-lesions-detects-an-aneuploid-subset-of-inflammatory-bowel-disease-associated-serrated-epithelial-change-and-traditional-serrated-adenomas
#13
Won-Tak Choi, Kwun Wah Wen, Peter S Rabinovitch, Danning Huang, Aras N Mattis, Ryan M Gill
AIMS: Serrated lesions (SLs), including sessile serrated adenoma (SSA) and traditional serrated adenoma (TSA), are important premalignant lesions for colorectal cancer (CRC). Although a small subset of SLs are known to harbor TP53 mutations and Wnt/β-catenin pathway activation, suggesting that they may develop dysplasia or CRC via a 'chromosomal instability (CIN)-like' pathway, it is unclear if aneuploidy (characteristic of conventional adenoma) ever develops in SLs and is associated with development of dysplasia or CRC, in this context...
May 17, 2018: Histopathology
https://www.readbyqxmd.com/read/29771954/preoperative-prediction-of-microvascular-invasion-of-hepatocellular-carcinoma-with-ivim-diffusion-weighted-mr-imaging-and-gd-eob-dtpa-enhanced-mr-imaging
#14
Wei Zhao, Wenguang Liu, Huaping Liu, Xiaoping Yi, Jiale Hou, Yigang Pei, Hui Liu, Deyun Feng, Liyu Liu, Wenzheng Li
Microvascular invasion (MVI) is regarded as one of the independent risk factors for recurrence and poor prognosis of hepatocellular carcinoma (HCC). The presence of MVI in HCCs was evaluated on the basis of pathological reports of surgical specimens and was defined as tumor within a vascular space lined by endothelium that was visible only on microscopy. The aim of the study was to investigate the usefulness of intravoxel incoherent motion (IVIM) diffusion weighted (DW) magnetic resonance (MR) imaging in predicting MVI of HCC...
2018: PloS One
https://www.readbyqxmd.com/read/29769821/validity-and-reliability-of-surface-electromyography-measurements-from-a-wearable-athlete-performance-system
#15
Scott K Lynn, Casey M Watkins, Megan A Wong, Katherine Balfany, Daniel F Feeney
The Athos ® wearable system integrates surface electromyography (sEMG ) electrodes into the construction of compression athletic apparel. The Athos system reduces the complexity and increases the portability of collecting EMG data and provides processed data to the end user. The objective of the study was to determine the reliability and validity of Athos as compared with a research grade sEMG system. Twelve healthy subjects performed 7 trials on separate days (1 baseline trial and 6 repeated trials). In each trial subjects wore the wearable sEMG system and had a research grade sEMG system's electrodes placed just distal on the same muscle, as close as possible to the wearable system's electrodes...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29768084/effect-of-phototherapy-on-masseter-and-anterior-temporal-muscles-before-induction-of-fatigue-a-randomized-sham-controlled-blind-clinical-trial
#16
Camila Haddad Leal de Godoy, Lara Jansiski Motta, Washington Steagall Júnior, Marcela Leticia Leal Gonçalves, Daniela Fátima Teixeira da Silva, Raquel Agnelli Mesquita-Ferrari, Aldo Brugnera Júnior, Sandra Kalil Bussadori
OBJECTIVE: This is a randomized, sham-controlled, blind clinical trial that aimed to evaluate the effect of phototherapy on bite force, mandibular range of motion, sensitivity to palpation, and fatigue in the masseter and anterior temporal muscles of young patients when administered before the induction of fatigue. MATERIALS AND METHODS: Fifty-two healthy volunteers aged 18-23 years were randomly allocated to a laser group and sham group. Both groups were submitted to a clinical evaluation to record mandibular range of motion, bite force, muscle sensitivity to palpation, and muscle fatigue...
May 16, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29765583/effect-of-diet-on-blood-viscosity-in-healthy-humans-a-systematic-review
#17
REVIEW
Hamideh Naghedi-Baghdar, Seyed-Mohammad Nazari, Ali Taghipour, Mohsen Nematy, Sadegh Shokri, Mohammad-Reza Mehri, Tahereh Molkara, Roghayeh Javan
Background: Increased whole blood viscosity is associated with increased risk of morbidity and mortality of several life-threatening diseases, including cardiovascular and cerebrovascular disease. The effect of diet on human health has been indicated in many studies, and a health dietary pattern can reduce the incidence of several chronic diseases. Objective: The aim of this systematic review was to assess the effect of diet on blood viscosity and related parameters such as haematocrit (HCT)...
March 2018: Electronic Physician
https://www.readbyqxmd.com/read/29765176/impairments-of-postural-control-functional-performance-and-strength-in-morbidly-obese-patients-awaiting-bariatric-surgery-in-comparison-to-healthy-individuals
#18
Max Lennart Eckstein, Jimmy Bradley Lawrence, Christoph Otto, Peggy Kotsch, Janin Messerschmidt, Richard Michael Bracken, Othmar Moser
[Purpose] There is a lack of information evaluating specific markers of performance in patients awaiting bariatric surgery. We aimed to assess the postural control, functional performance, strength and endurance performance for morbidly obese patients awaiting bariatric surgery compared to lean controls. [Subjects and Methods] All parameters were assessed by modified Y-balance test, timed-up-and-go-test, maximum strength testing on resistance exercise equipment and cardio-pulmonary exercise testing on a cycle ergometer in 10 morbidly obese patients awaiting bariatric surgery and 10 age- and sex-matched lean controls...
May 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29763997/technical-note-deep-learning-based-mrac-using-rapid-ultra-short-echo-time-imaging
#19
Hyungseok Jang, Fang Liu, Gengyan Zhao, Tyler Bradshaw, Alan B McMillan
PURPOSE: In this study, we explore the feasibility of a novel framework for MR-based attenuation correction for PET/MR imaging based on deep learning via convolutional neural networks, which enables fully automated and robust estimation of a pseudo CT image based on ultrashort echo time (UTE), fat, and water images obtained by a rapid MR acquisition. METHODS: MR images for MRAC are acquired using dual echo ramped hybrid encoding (dRHE), where both UTE and out-of-phase echo images are obtained within a short single acquisition (35 sec)...
May 15, 2018: Medical Physics
https://www.readbyqxmd.com/read/29762711/use-of-random-regression-to-estimate-genetic-parameters-of-temperament-across-an-age-continuum-in-a-crossbred-cattle-population
#20
B P Littlejohn, D G Riley, T H Welsh, R D Randel, S T Willard, R C Vann
The objective was to estimate genetic parameters of temperament in beef cattle across an age continuum. The population consisted predominantly of Brahman-British crossbred cattle. Temperament was quantified by: 1) pen score (PS), the reaction of a calf to a single experienced evaluator on a scale of 1 to 5 (1 = calm, 5 = excitable); 2) exit velocity (EV), the rate (m/sec) at which a calf traveled 1.83 m upon exiting a squeeze chute; and 3) temperament score (TS), the numerical average of PS and EV. Covariates included days of age and proportion of Bos indicus in the calf and dam...
May 12, 2018: Journal of Animal Science
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