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https://www.readbyqxmd.com/read/29778072/nmr-at-pressures-up-to-90-gpa
#1
Thomas Meier, Saiana Khandarkhaeva, Sylvain Petitgirard, Thomas Körber, Alexander Lauerer, Ernst Rössler, Leonid Dubrovinsky
The past 15 years have seen an astonishing increase in Nuclear Magnetic Resonance (NMR) sensitivity and accessible pressure range in high-pressure NMR experiments, owing to a series of new developments of NMR spectroscopy applied to the diamond anvil cell (DAC). Recently, with the application of electro-magnetic lenses, so-called Lenz lenses, in toroidal diamond indenter cells, pressures of up to 72 GPa with NMR spin sensitivities of about 1012  spin/Hz1/2 has been achieved. Here, we describe the implementation of a refined NMR resonator structure using a pair of double stage Lenz lenses driven by a Helmholtz coil within a standard DAC, allowing to measure sample volumes as small as 100 pl prior to compression...
May 14, 2018: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/29777963/red-wolf-canis-rufus-sperm-quality-and-quantity-is-affected-by-semen-collection-method-extender-components-and-post-thaw-holding-temperature
#2
Ashley D Franklin, William T Waddell, Karen L Goodrowe
Cryopreserving genetic resources is becoming increasingly important for species management. In the zoo-based red wolf (Canis rufus) population, inbreeding continues to increase in the absence of new founders. Through banking sperm, we preserve genetic diversity and create the ability to decrease inbreeding accumulation in the future. The quality and quantity of banked sperm can be affected by cryopreservation media and semen collection methods. This study's objectives were to further optimize semen extender used for red wolf sperm cryopreservation, investigate effects of post-thaw holding temperature, and to determine if urethral catheterization is an effective method for semen collection in this species...
May 16, 2018: Theriogenology
https://www.readbyqxmd.com/read/29777932/application-of-a-surfactant-assisted-dispersive-liquid-liquid-microextraction-method-along-with-central-composite-design-for-micro-volume-based-spectrophotometric-determination-of-low-level-of-cr-vi-ions-in-aquatic-samples
#3
Hamid Reza Sobhi, Efat Azadikhah, Mohammad Behbahani, Ali Esrafili, Mahnaz Ghambarian
A fast, simple, low cost surfactant-assisted dispersive liquid-liquid microextraction method along with central composite design for the determination of low level of Cr(VI) ions in several aquatic samples has been developed. Initially, Cr(VI) ions present in the aqueous sample were readily reacted with 1,5‑diphenylcarbazide (DPC) in acidic medium through complexation. Sodium dodecyl sulfate (SDS), as an anionic surfactant, was then employed as an ion-pair agent to convert the cationic complex into the neutral one...
May 9, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29777902/chemical-characterization-and-cerebroprotective-effect-of-methanolic-root-extract-of-colebrookea-oppositifolia-in-rats
#4
Gollapalle Lakshminarayanashastry Viswanatha, Marikunte V Venkataranganna, Nunna Bheema Lingeswara Prasad, Shylaja Hanumanthappa
ETHNOPHARMACOLOGICAL RELEVANCE: Colebrookea oppositifolia Smith is one of the extensively used plants to treat neurological conditions such as epilepsy by the various ethnic communities in sub-Himalayan regions of India such as Bhoxa, Tharu and nomadic Gujjars. AIM OF THE STUDY: This study was conducted to evaluate the cerebroprotective effect of C. oppositifolia methanolic root (MeCO) extract in Wistar rats. MATERIALS AND METHODS: The MeCO was characterized for total phenolic content and later subjected for detailed liquid chromatography-mass spectrometry analysis...
May 16, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29777888/primary-intracranial-rhabdomyosarcoma-in-the-cerebellopontine-angle-resected-after-preoperative-embolization
#5
Keisuke Yoshida, Tomoru Miwa, Takenori Akiyama, Masaaki Nishimoto, Dai Kamamoto, Kazunari Yoshida
BACKGROUND: Primary intracranial rhabdomyosarcoma is a very rare malignant tumor. Due to moderately vascular and firm characteristics of the tumor, complete removal without complications is often difficult. Moreover, in pediatric patients, the volume of total blood is less than adults and minimal intraoperative hemorrhage is desirable. CASE DESCRIPTION: A 6-year-old boy presented with ataxia and was found to have a large cerebellopontine angle tumor and hydrocephalus...
May 16, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29777855/polymer-lipid-hybrid-nanoparticles-as-enhanced-indomethacin-delivery-systems
#6
Annalisa Dalmoro, Sabrina Bochicchio, Shamil F Nasibullin, Paolo Bertoncin, Gaetano Lamberti, Anna Angela Barba, Rouslan I Moustafine
Non-steroidal anti-inflammatory drugs (NSAIDs), i.e. indomethacin used for rheumatoid arthritis and non-rheumatoid inflammatory diseases, are known for their injurious actions on the gastrointestinal (GI) tract. Mucosal damage can be avoided by using nanoscale systems composed by a combination of liposomes and biodegradable natural polymer, i.e. chitosan, for enhancing drug activity. Aim of this study was to prepare chitosan-lipid hybrid delivery systems for indomethacin dosage through a novel continuous method based on microfluidic principles...
May 16, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29777819/7-tesla-magnetic-resonance-imaging-of-caudal-anterior-cingulate-and-posterior-cingulate-cortex-atrophy-in-patients-with-trigeminal-neuralgia
#7
Hyeong Cheol Moon, Chan-A Park, Yeong-Jae Jeon, Soon Tae You, Hyun Man Baek, Youn Joo Lee, Chul Beom Cho, Chae Joon Cheong, Young Seok Park
The cingulate cortex (CC) is a brain region that plays a key role in pain processing, but CC abnormalities are not unclear in patients with trigeminal neuralgia (TN). The purpose of this study was to determine the central causal mechanisms of TN and the surrounding brain structure in healthy controls and patients with TN using 7 Tesla (T) magnetic resonance imaging (MRI). Whole-brain parcellation in gray matter volume and thickness was assessed in 15 patients with TN and 16 healthy controls matched for sex, age, and regional variability using T1-weighted imaging...
May 16, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29777790/effect-of-intratesticular-hematoma-on-testis-microstructure-spermatogenesis-and-testosterone-production-defining-a-cut-off-point-for-significant-intratesticular-hematoma
#8
Alireza Aminsharifi, Alireza Monsef, Ali Noorafshan, Saied Karbalay-Doust, Zahra Jafarinezhad, Omid Koohi, Afshin Molaei
OBJECTIVES: To evaluate the effect of different degrees of intratesticular hematoma (ITH), a major consequence of blunt testis trauma, on testis microstructure and function. We determined a cut-off point for significant vs. nonsignificant ITH. METHODS: Seventy male rats were divided into 7 equal groups. The control group (G) remained intact. Sham groups consisted of rats given an intratesticular injection of normal saline in both testicles with volumes equivalent to 40% of testis volume (G-II), 30% (G-III) and 10% (G-IV)...
May 16, 2018: Urology
https://www.readbyqxmd.com/read/29777782/financial-analysis-of-pediatric-resident-physician-primary-care-longitudinal-outpatient-experience
#9
Carole H Stipelman, Brad Poss, Laura Anne Stetson, Luca Boi, Michael Rogers, Caleb Puzey, Sri Koduri, Robert Kaplan, Vivian S Lee, Edward B Clark
PURPOSE: To determine whether residency training represents a net positive or negative cost to academic medical centers, we analyzed the cost of a residency program and clinical productivity of residents and faculty in outpatient primary care practice with or without residents. METHOD: Patient volume and revenue data (Current Procedural Terminology codes) from an academic primary care general pediatric clinic were evaluated for faculty clinics (faculty only) and resident teaching clinics (Longitudinal Outpatient Experience [LOE]) with 1-4 residents/faculty...
May 16, 2018: Academic Pediatrics
https://www.readbyqxmd.com/read/29777760/peripheral-intravenous-volume-assessment-piva-for-quantitating-volume-overload-in-patients-hospitalized-with-acute-decompensated-heart-failure-a-pilot-study
#10
Merrick Miles, Bret D Alvis, Kyle Hocking, Franz Baudenbacher, Christy Guth, JoAann Lindenfeld, Colleen Brophy, Susan Eagle
BACKGROUND: To determine the feasibility of Peripheral Intravenous Volume Assessment (PIVA) of venous waveforms for assessing volume overload in patients admitted to the hospital with acute decompensated heart failure (ADHF). METHODS: Venous waveforms were captured from a peripheral intravenous catheter in subjects admitted for ADHF and healthy age-matched controls. Admission PIVA signal, brain natriuretic peptide, and chest radiographic measurements were related to the net volume removed during diuresis...
May 16, 2018: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/29777726/a-novel-approach-to-probabilistic-characterisation-of-neural-firing-patterns
#11
Gorana Mijatović, Tatjana Lončar-Turukalo, Emmanuel Procyk, Dragana Bajić
BACKGROUND: The advances in extracellular neural recording techniques result in big data volumes that necessitate fast, reliable, and automatic identification of statistically similar units. This study proposes a single framework yielding a compact set of probabilistic descriptors that characterise the firing patterns of a single unit. NEW METHOD: Probabilistic features are estimated from an inter-spike-interval time series, without assumptions about the firing distribution or the stationarity...
May 16, 2018: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29777681/electrochemical-enzymatic-fenitrothion-sensor-based-on-a-tyrosinase-poly-2-hydroxybenzamide-modified-graphite-electrode
#12
Maria de Fátima Alves, Ricardo Augusto Moreira de Souza Corrêa, Filipe Soares da Cruz, Diego Leoni Franco, Lucas Franco Ferreira
This paper reports the electrosynthesis and characterisation of a polymeric film derived from 2-hydroxybenzamide over a graphite electrode and its application as an enzymatic biosensor for the determination and quantification of the pesticide fenitrothion. The material was analysed by scanning electron microscopy and its electrochemical properties characterised by cyclic voltammetry and electrochemical impedance spectroscopy. The enzyme tyrosinase was immobilised over the modified electrode by the drop and dry technique...
May 16, 2018: Analytical Biochemistry
https://www.readbyqxmd.com/read/29777581/in-vivo-performance-of-a-visible-wavelength-optical-sensor-for-monitoring-intestinal-perfusion-and-oxygenation
#13
Mitchell B Robinson, Anna M Wisniowiecki, Ryan J Butcher, Mark A Wilson, M Nance Ericson, Gerard L Cote
Traumatic injury resulting in hemorrhage is a prevalent cause of death worldwide. The current standard of care for trauma patients is to restore hemostasis by controlling bleeding and administering intravenous volume resuscitation. Adequate resuscitation to restore tissue blood flow and oxygenation is critical within the first hours following admission to assess severity and avoid complications. However, current clinical methods for guiding resuscitation are not sensitive or specific enough to adequately understand the patient condition...
May 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29777564/the-importance-of-non-regional-lymph-nodes-in-assigning-risk-in-primary-metastatic-prostate-cancer
#14
Adnan Ali, Alexander Hoyle, Hitesh Mistry, Noel W Clarke
OBJECTIVE: To determine the prognostic relevance of non-regional lymph nodes (NRLN) metastases presenting synchronously with bone metastases in metastatic prostate cancer (mPCa) for guiding treatment decisions based on oligometastatic definitions. PATIENTS AND METHODS: Patients diagnosed with mPCa between 2004 and 2013 were identified from the surveillance, epidemiology and end-results (SEER) database and were grouped by metastatic sites into only NRLN, only bone, bone + NRLN and other sites ± bone/NRLN metastases...
May 19, 2018: BJU International
https://www.readbyqxmd.com/read/29777562/post-operative-stereotactic-radiotherapy-for-the-treatment-of-intracranial-haemangiopericytoma-a-study-of-dose-and-outcome
#15
Rohan Nair, Vanessa Panettieri, Joe H Chang, Michael Dally
INTRODUCTION: This study was performed to assess the relationship between tumour response and radiation dose in equivalent 2 Gy per fraction (EQD2). METHOD: A retrospective cohort analysis of 21 patients with a diagnosis of intracranial haemangiopericytoma between 2000 and 2013 was included in this study. A total of 39 lesions were analysed. The equivalent dose in 2 Gy per fraction was calculated by assigning an alpha-beta ratio of 12 Gy. A paired t-test compared dose (EQD2) and tumour response, and as the outcome was binary, a logistic regression analysis was performed...
May 19, 2018: Journal of Medical Imaging and Radiation Oncology
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
#16
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/29777525/preconcentration-and-determination-of-trace-nickel-and-cobalt-in-milk-based-samples-by-ultrasound-assisted-cloud-point-extraction-coupled-with-flame-atomic-absorption-spectrometry
#17
Nuket Kartal Temel, Kadriye Sertakan, Ramazan Gürkan
In this study, ultrasound-assisted cloud point extraction (UA-CPE) method was developed for the determination of Ni(II) and Co(II) in milk-based products. After extraction and preconcentration, the Ni(II) and Co(II) contents of samples were determined by flame atomic absorption spectrometry (FAAS). After their complexation with hydroxy naphthol blue (HNB) in the presence of cationic surfactant, CTAB at pH 4.0, the Ni(II) and Co(II) were taken within the micellar phase of nonionic surfactant, TX-114. The micellar phase containing the analytes were diluted to a volume of 0...
May 18, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29777454/improved-outcomes-in-394-pancreatic-cancer-resections-the-impact-of-enhanced-recovery-pathway
#18
Vandana Agarwal, Martin Jose Thomas, Riddhi Joshi, Vikram Chaudhari, Manish Bhandare, Abhishek Mitra, Ashwin deSouza, Reshma Ambulkar, Shailesh V Shrikhande
BACKGROUND: Enhanced recovery (ER) pathway reduces morbidity and accelerates recovery. It is associated with reduced postoperative stay, morbidity, and costs. Feasibility and safety of ER programme has not been studied in developing countries. The objectives were to assess compliance with Enhanced Recovery After Surgery (ERAS) elements and to assess outcomes in pancreatic surgery. METHODS: Prospective study conducted from February 2014 to December 2016, following elective pancreatic cancer surgery...
May 18, 2018: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/29777418/earliest-radiological-progression-in-glioblastoma-by-multidisciplinary-consensus-review
#19
Roelant S Eijgelaar, Anna M E Bruynzeel, Frank J Lagerwaard, Domenique M J Müller, Freek R Teunissen, Frederik Barkhof, Marcel van Herk, Philip C De Witt Hamer, Marnix G Witte
BACKGROUND: Detection of glioblastoma progression is important for clinical decision-making on cessation or initiation of therapy, for enrollment in clinical trials, and for response measurement in time and location. The RANO-criteria are considered standard for the timing of progression. To evaluate local treatment, we aim to find the most accurate progression location. We determined the differences in progression free survival (PFS) and in tumor volumes at progression (Vprog) by three definitions of progression...
May 18, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29777325/developing-an-interactive-data-visualization-tool-to-assess-the-impact-of-decision-support-on-clinical-operations
#20
Timothy C Huber, Arun Krishnaraj, Dayna Monaghan, Cree M Gaskin
Due to mandates from recent legislation, clinical decision support (CDS) software is being adopted by radiology practices across the country. This software provides imaging study decision support for referring providers at the point of order entry. CDS systems produce a large volume of data, providing opportunities for research and quality improvement. In order to better visualize and analyze trends in this data, an interactive data visualization dashboard was created using a commercially available data visualization platform...
May 18, 2018: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
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