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https://www.readbyqxmd.com/read/28067589/novel-bioflocculant-produced-by-salt-tolerant-alkaliphilic-strain-oceanobacillus-polygoni-hg6-and-its-application-in-tannery-wastewater-treatment
#1
Jing Li, Yue-Qing Yun, Li Xing, Lei Song
The optimized production of MBF-HG6, which is a novel salt-tolerant alkaliphilic bioflocculant produced by Oceanobacillus polygoni with its application in tannery wastewater treatment was investigated in this study. It was found the optimal carbon source, nitrogen source, cation, and initial pH of the medium for bioflocculant production were starch, urea, Fe(2+), and pH 9.0, respectively. The best stability in the temperature range was from 0 to 80°C and the purified MBF-HG6 contained polysaccharides of 81...
January 9, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28058674/quantitative-myocardial-blood-flow-imaging-with-integrated-time-of-flight-pet-mr
#2
Tanja Kero, Jonny Nordström, Hendrik J Harms, Jens Sörensen, Håkan Ahlström, Mark Lubberink
BACKGROUND: The use of integrated PET-MR offers new opportunities for comprehensive assessment of cardiac morphology and function. However, little is known on the quantitative accuracy of cardiac PET imaging with integrated time-of-flight PET-MR. The aim of the present work was to validate the GE Signa PET-MR scanner for quantitative cardiac PET perfusion imaging. Eleven patients (nine male; mean age 59 years; range 46-74 years) with known or suspected coronary artery disease underwent (15)O-water PET scans at rest and during adenosine-induced hyperaemia on a GE Discovery ST PET-CT and a GE Signa PET-MR scanner...
December 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/28050630/myocardial-blood-flow-and-left-ventricular-functional-reserve-in-hypertrophic-cardiomyopathy-a-13-nh3-gated-pet-study
#3
Roberto Sciagrà, Raffaella Calabretta, Fabrizio Cipollini, Alessandro Passeri, Angelo Castello, Franco Cecchi, Iacopo Olivotto, Alberto Pupi
INTRODUCTION: Ischemia in hypertrophic cardiomyopathy (HCM) is caused by coronary microvascular dysfunction (CMD), which is detected by measuring myocardial blood flow (MBF) with PET. Whether CMD may be associated with ischemic left ventricular (LV) dysfunction is unclear. We therefore assessed LV ejection fraction (EF) reserve in HCM patients undergoing dipyridamole (Dip) PET. METHODS: Resting and stress (13)NH3 dynamic as well as gated PET were performed in 34 HCM patients...
January 3, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28046589/tu-h-campus-iep3-04-evaluation-of-changes-in-quantitative-ultrasound-parameters-during-prostate-radiotherapy
#4
M Najafi, A El Kaffas, B Han, D Cooper, S Hancock, D Hristov
PURPOSE: Clarity Autoscan ultrasound monitoring system allows acquisition of raw radiofrequency (RF) ultrasound data prior and during radiotherapy. This enables the computation of 3D Quantitative Ultrasound (QUS) tissue parametric maps from. We aim to evaluate whether QUS parameters undergo changes with radiotherapy and thus potentially be used as early predictors and/or markers of treatment response in prostate cancer patients. METHODS: In-vivo evaluation was performed under IRB protocol to allow data collection in prostate patients treated with VMAT whereby prostate was imaged through the acoustic window of the perineum...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27998007/mandibular-movements-and-bite-force-in-alzheimer-disease-before-and-after-new-denture-insertion
#5
Camila Heitor Campos, Giselle Rodrigues Ribeiro, Florindo Stella, Renata Cunha Matheus Rodrigues Garcia
BACKGROUND: Chewing impairment has been observed in elders with Alzheimer disease (AD), however it is unknown whether oral rehabilitation can improve their masticatory function. OBJECTIVE: This study evaluated the influence of new removable prostheses on chewing function of patients with AD METHODS: Participants using removable dentures were divided into two groups: patients with mild AD (77.2 ± 5.8 years, n=16) and controls (76.0 ± 4.4, n=16). All participants received general dental treatment and new total and/or partial removable prostheses...
December 20, 2016: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/27997375/impact-of-motion-and-partial-volume-effects-correction-on-pet-myocardial-perfusion-imaging-using-simultaneous-pet-mr
#6
Yoann Petibon, Nicolas J Guehl, Timothy G Reese, Behzad Ebrahimi, Marc D Normandin, Timothy M Shoup, Nathaniel M Alpert, Georges El Fakhri, Jinsong Ouyang
PET is an established modality for myocardial perfusion imaging (MPI) which enables quantification of absolute myocardial blood flow (MBF) using dynamic imaging and kinetic modeling. However, heart motion and partial volume effects (PVE) significantly limit the spatial resolution and quantitative accuracy of PET MPI. Simultaneous PET-MR offers a solution to the motion problem in PET by enabling MR-based motion correction of PET data. The aim of this study was to develop a motion and PVE correction methodology for PET MPI using simultaneous PET-MR, and to assess its impact on both static and dynamic PET MPI using (18)F-Flurpiridaz, a novel (18)F-labeled perfusion tracer...
January 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27989579/plasma-palmitoylethanolamide-pea-as-a-potential-biomarker-for-impaired-coronary-function
#7
Alessandra Quercioli, Federico Carbone, Aldo Bonaventura, Luca Liberale, Zoltan Pataky, Aurélien Thomas, Sébastien Lenglet, Estelle Lauer, Alain Golay, Franco Dallegri, Vincenzo Di Marzo, Thomas H Schindler, Fabrizio Montecucco
BACKGROUND: Among endocannabinoid (EC)-related mediators, Oleoyl-ethanolamide (OEA) and Palmitoyl-ethanolamide (PEA), two endogenous PPARα agonists with lipolytic and anti-inflammatory action, respectively, are being actively investigated. Here, we assessed the potential association between plasma levels of PEA and OEA and coronary function in a cohort including normal, overweight, obese, and morbidly obese (MOB) individuals. METHODS: Myocardial perfusion and endothelium-related myocardial blood flow (MBF) responses to cold pressor test (CPT) and during pharmacological vasodilation with dipyridamole were measured with (13)N-ammonia positron emission tomography/computed tomography...
December 13, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27982245/craniofacial-morphology-affects-bite-force-in-patients-with-painful-temporomandibular-disorders
#8
Paula Furlan Bavia, Larissa Soares Reis Vilanova, Renata Cunha Matheus Rodrigues Garcia
Craniofacial morphology affects masticatory performance in healthy dentate subjects, but little is known about its effects in patients with painful temporomandibular disorders (TMDs). Forty-eight female patients (mean age of 28±5.8 years) with painful TMDs underwent lateral cephalometric radiography. Using Ricketts' cephalometric analysis and the Vert method, subjects were assigned to three groups according to their craniofacial morphology: brachyfacial (n=22), mesofacial (n=13), and dolichofacial (n=13). Research diagnostic criteria for TMD were used to confirm the TMD diagnosis for each patient...
September 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27855349/comparison-of-rest-and-adenosine-stress-quantitative-and-semi-quantitative-myocardial-perfusion-using-magnetic-resonance-in-patients-with-ischemic-heart-disease
#9
COMPARATIVE STUDY
Abbas A Qayyum, Faiza Qayyum, Henrik B W Larsson, Andreas Kjaer, Philip Hasbak, Niels G Vejlstrup, Jens Kastrup
The aim was to compare absolute quantified myocardial perfusion (MP) to semi-quantitative measurements of MP using MRI for detection of ischemia. Twenty-nine patients underwent rest and stress MP imaging obtained by 1.5T MRI and analyzed using own developed software and by commercial available software. Linear regression analysis demonstrated that absolute quantitative data correlated stronger to maxSI (rest: r=0.296, p=.193; stress: r=0.583, p=0.011; myocardial perfusion reserve (MPR): r=0.789, p<0.001; and Δ myocardial blood flow (Δ MBF: r=0...
January 2017: Clinical Imaging
https://www.readbyqxmd.com/read/27848160/coronary-flow-reserve-and-relative-flow-reserve-measured-by-n-13-ammonia-pet-for-characterization-of-coronary-artery-disease
#10
Sang-Geon Cho, Ki Seong Park, Jahae Kim, Sae-Ryung Kang, Ho-Chun Song, Ju Han Kim, Jae Yeong Cho, Young Joon Hong, Zeenat Jabin, Hee Jeong Park, Geum-Cheol Jeong, Seong Young Kwon, Jin Chul Paeng, Hyeon Sik Kim, Jung-Joon Min, Ernest V Garcia, Henry Hee-Seung Bom
OBJECTIVE: We evaluated the relationships between coronary flow reserve (CFR) and relative flow reserve (RFR) measured by N-13 ammonia positron emission tomography (PET) for characterization of epicardial coronary artery disease (CAD). METHODS: Sixty-nine consecutive stable angina patients underwent N-13 ammonia PET, coronary computed tomography angiography (CCTA), and if necessary, invasive coronary angiography (CAG) within 2 weeks. Myocardial blood flow (MBF), CFR, RFR, and coronary vascular resistance of the reference arterial territory (CVRref) were measured by N-13 ammonia PET...
November 15, 2016: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/27834683/contribution-of-adenosine-to-the-increase-in-skeletal-muscle-blood-flow-caused-by-manual-acupuncture-in-rats
#11
Hisashi Shinbara, Satomi Nagaoka, Yasuyuki Izutani, Masamichi Okubo, Keisaku Kimura, Kunio Mizunuma, Eiji Sumiya
BACKGROUND AND AIM: Adenosine is believed to play an important role in local acupuncture analgesia. The aim of this study was to investigate the contribution of adenosine to the increase in skeletal muscle blood flow (MBF) caused by manual acupuncture (MA). METHODS: Thirty-two male Sprague-Dawley rats (310-360 g) were anaesthetised and divided into four equal groups (n=8 each): Saline, Saline+MA, Theophylline, and Theophylline+MA. In the two MA groups, the sparrow-pecking MA technique was applied at 30 repetitions per min for 1 min to a depth of 15-18 mm using a stainless steel acupuncture needle (0...
November 10, 2016: Acupuncture in Medicine: Journal of the British Medical Acupuncture Society
https://www.readbyqxmd.com/read/27826897/interactions-between-%C3%AE-adrenergic-vasodilation-and-cervical-sympathetic-nerves-are-mediated-by-%C3%AE-2-adrenoceptors-in-the-rat-masseter-muscle
#12
Hisayoshi Ishii, Toshiya Sato
Neural and humoral autonomic mechanisms may be important in the maintenance of blood flow in the masseter muscle (MBF). However, their interactions remain unclear. In this study, we examined interactions between neural and humoral regulation of MBF and investigated the mechanisms mediating these interactions in urethane-anesthetized rats. Stimulation of the adrenal nerve (AN) projecting to the adrenal medulla increased MBF, and this increase was mediated by β-adrenoceptors. Sectioning of the superior cervical sympathetic trunk (CST) significantly inhibited increases in MBF induced by AN stimulation during high activity in the CST, but not during low activity...
November 8, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27804067/consistent-tracer-administration-profile-improves-test-retest-repeatability-of-myocardial-blood-flow-quantification-with-82-rb-dynamic-pet-imaging
#13
Ran Klein, Adrian Ocneanu, Jennifer M Renaud, Maria C Ziadi, Rob S B Beanlands, Robert A deKemp
OBJECTIVES: Quantification of myocardial blood flow (MBF) and stress/rest flow reserve is used increasingly to diagnose multi-vessel coronary artery disease and micro-vascular disease with PET imaging. However, variability in the measurements may limit physician confidence to direct revascularization therapies based on specific threshold values. This study evaluated the effects of rubidium-82 ((82)Rb) tracer injection profile using a constant-activity-rate (CA) vs a constant-flow-rate (CF) infusion to improve test-retest repeatability of MBF measurements...
November 1, 2016: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/27771003/effect-of-diffuse-subendocardial-hypoperfusion-on-left-ventricular-cavity-size-by-13-n-ammonia-perfusion-pet-in-patients-with-hypertrophic-cardiomyopathy
#14
Hulya Yalçin, Ines Valenta, Fatih Yalçin, Celia Corona-Villalobos, Nestor Vasquez, Joshua Ra, Nagehan Kucukler, Abdel Tahari, Iraklis Pozios, Yun Zhou, Martin Pomper, Theodore P Abraham, Thomas H Schindler, M Roselle Abraham
Vasodilator-induced transient left ventricular (LV) cavity dilation by positron emission tomography (PET) is common in patients with hypertrophic cardiomyopathy (HC). Because most patients with PET-LV cavity dilation lack obstructive epicardial coronary artery disease, we hypothesized that vasodilator-induced subendocardial hypoperfusion resulting from microvascular dysfunction underlies this result. To test this hypothesis, we quantified myocardial blood flow (MBF) (subepicardial, subendocardial, and global MBF) and left ventricular ejection fraction (LVEF) in 104 patients with HC without significant coronary artery disease, using (13)NH3-PET...
September 15, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27704198/diagnostic-value-of-transmural-perfusion-ratio-derived-from-dynamic-ct-based-myocardial-perfusion-imaging-for-the-detection-of-haemodynamically-relevant-coronary-artery-stenosis
#15
Adriaan Coenen, Marisa M Lubbers, Akira Kurata, Atsushi Kono, Admir Dedic, Raluca G Chelu, Marcel L Dijkshoorn, Alexia Rossi, Robert-Jan M van Geuns, Koen Nieman
OBJECTIVES: To investigate the additional value of transmural perfusion ratio (TPR) in dynamic CT myocardial perfusion imaging for detection of haemodynamically significant coronary artery disease compared with fractional flow reserve (FFR). METHODS: Subjects with suspected or known coronary artery disease were prospectively included and underwent a CT-MPI examination. From the CT-MPI time-point data absolute myocardial blood flow (MBF) values were temporally resolved using a hybrid deconvolution model...
October 4, 2016: European Radiology
https://www.readbyqxmd.com/read/27695812/differences-in-body-condition-of-gilts-that-are-maintained-from-mating-to-the-end-of-gestation-affect-mammary-development
#16
C Farmer, M Comi, C R A Duarte, M Vignola, P Charagu, M-F Palin
The goal of this project was to determine if different body conditions in late gestation that are due to varying body conditions at mating affect mammary development and mammary gene expression of gilts. Gilts that were fed ad libitum in the growing period were selected based on their backfat depths to form 3 groups at mating, namely, low backfat (LBF; 12-15 mm; = 14), medium backfat (MBF; 17-19 mm; = 15), and high backfat (HBF; 22-26 mm; = 16). During gestation, LBF, MBF, and HBF gilts were fed approximately 1...
August 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27690364/maximum-bite-force-of-edentulous-patients-before-and-after-dental-implant-rehabilitation-long-term-follow-up-and-facial-type-influence
#17
Ana Cláudia M Melo, Ingrid M Ledra, Rogéria A Vieira, Edivaldo R Coró, Ivete Aparecida de M Sartori
PURPOSE: (1) To evaluate patients' long-term maximum bite force (MBF) after rehabilitation with mandibular implant-supported prosthesis, (2) to assess the influence of facial pattern in MBF, and (3) to evaluate the relation between the dominant chewing side and MBF. MATERIALS AND METHODS: Twenty-nine patients were selected. Pre- (T0) and immediate post-rehabilitation (T1) data of MBF were collected. In a follow-up visit 3 to 5 years after rehabilitation (T2), 24 patients participated...
September 30, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27681955/stress-myocardial-blood-flow-correlates-with-ventricular-function-and-synchrony-better-than-myocardial-perfusion-reserve-a-nitrogen-13-ammonia-pet-study
#18
Luis Eduardo Juárez-Orozco, Erick Alexanderson, Rudi A Dierckx, Hendrikus H Boersma, Johannes L Hillege, Clark J Zeebregts, Myriam M Martínez-Aguilar, Antonio Jordán-Ríos, Ana Gabriela Ayala-German, Niek Prakken, Rene A Tio, Riemer H Slart
BACKGROUND: Cardiac PET quantifies stress myocardial blood flow (MBF) and perfusion reserve (MPR), while ECG-gated datasets can measure components of ventricular function simultaneously. Stress MBF seems to outperform MPR in the detection of significant CAD. However, it is uncertain which perfusion measurement is more related to ventricular function. We hypothesized that stress MBF correlates with ventricular function better than MPR in patients studied for suspected myocardial ischemia...
September 28, 2016: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/27624818/the-impact-of-prompt-gamma-compensation-on-myocardial-blood-flow-measurements-with-rubidium-82-dynamic-pet
#19
Ian S Armstrong, Matthew J Memmott, Christine M Tonge, Parthiban Arumugam
BACKGROUND: Rubidium-82 myocardial perfusion imaging is a well-established technique for assessing myocardial ischemia. With continuing interest on myocardial blood flow (MBF) and myocardial flow reserve (MFR) measurements, there is a requirement to fully appreciate the impact of technical aspects of the process. One such factor for rubidium-82 is prompt gamma compensation (PGC). This study aims to assess the impact of PGC on MBF and MFR calculated from dynamic Rb-82 data. METHODS: Dynamic rest and stress images were acquired on a Siemens Biograph mCT and reconstructed with and without PGC in 50 patients (29 male)...
September 13, 2016: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/27611710/clinical-relevance-of-pet-myocardial-blood-flow-quantification
#20
Lucia Leccisotti, Mariadea Lavalle, Alessandro Giordano
Until a few years ago, myocardial perfusion imaging (MPI) using positron-emission tomography (PET) and the absolute quantification of myocardial blood flow (MBF) was limited to research institutions. Following an increase in the number of PET scanner installations and in the availability of perfusion tracers that do not have to be produced by an on-site cyclotron and commercial software for MBF quantification, a more widespread clinical use of MBF quantification with PET can be expected. This article aims to provide a comprehensive overview of the advantages of MBF quantification with PET highlighting the potential applications in several clinical settings, from patients with cardiovascular risk factors and early coronary artery disease (CAD) to patients with multi-vessel or myocardial disease...
December 2016: Quarterly Journal of Nuclear Medicine and Molecular Imaging
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