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https://www.readbyqxmd.com/read/28551141/novel-approach-to-two-component-speciation-analysis-spectrophotometric-flow-based-determinations-of-fe-ii-fe-iii-and-cr-iii-cr-vi
#1
J Paluch, J Kozak, M Wieczorek, M Kozak, J Kochana, K Widurek, M Konieczna, P Kościelniak
The proposed approach to two-component speciation analysis relies on simultaneous application of two calibration methods to determination of two different forms of an analyte. One form is determined in extrapolative way, whereas the second form is determined in interpolative way, with the use of the same calibration graph, after appropriate chemical treatment, e.g. oxidation or reduction. The applicability of the approach has been verified on the examples of spectrophotometric determinations of Fe(II)/Fe(III) and Cr(VI)/Cr(III) using 1,10-phenanthroline and 1,5-diphenylcarbazide methods, respectively...
August 15, 2017: Talanta
https://www.readbyqxmd.com/read/28550788/a-case-report-of-venous-thrombosis-after-kidney-transplantation-we-can-save-the-graft-time-is-the-success-factor
#2
Paulo Roberto Kawano, Hamilto Akihissa Yamamoto, Rodrigo Gerra, Paula Dalsoglio Garcia, Mariana Moraes Contti, Hong Si Nga, Henrique Mochida Takase, Ariane Moyses Bravin, Luis Gustavo Modelli de Andrade
INTRODUCTION: Venous thrombosis is a serious surgical complication that frequently results in loss of kidney graft. CASE PRESENTATION: We report the case of a female patient recipient of a decease kidney transplant that in the tenth postoperative presented with hematuria, graft pain and oliguria. Ultrasound examination was suggestive of venous thrombosis with abnormal doppler waveform pattern and reversal of diastolic flow. She underwent emergency surgical intervention after 2h of diagnosis...
May 19, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28550100/an-alternative-surgical-approach-reduces-variability-following-filament-induction-of-experimental-stroke-in-mice
#3
M Trotman-Lucas, M E Kelly, J Janus, R Fern, C L Gibson
Animal models are critical for understanding the pathology of stroke and investigating potential treatments. However, in vivo stroke models are associated, particularly in mice, with high variability in lesion volume. We investigated whether a surgical refinement where reperfusion is not reliant on the Circle of Willis reduced outcome variability. Mice underwent 60 minutes of transient middle cerebral artery occlusion avoiding ligation of the external carotid artery. During reperfusion the common carotid artery was either ligated (standard approach), or it was repaired to allow re-establishment of blood flow through the common carotid artery...
May 26, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28548482/simultaneous-separation-and-washing-of-non-magnetic-particles-in-an-inertial-ferrofluid-water-co-flow
#4
Qi Chen, Di Li, Jianhan Lin, Mao-Hua Wang, Xiangchun Xuan
Magnetic fluids (e.g., paramagnetic solutions and ferrofluids) have been increasingly used for label-free separation of non-magnetic particles in microfluidic devices. Their biocompatibility, however, becomes a concern in high-throughput or large-volume applications. One way to potentially resolve this issue is re-suspending the particles that are separated in a magnetic fluid immediately into a biocompatible buffer. We demonstrate herein the proof-of-principle of the first integration of negative magnetophoresis and inertial focusing for a simultaneous separation and washing of non-magnetic particles in co-flowing ferrofluid and water streams...
May 26, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28548474/aortic-aneurysm-endovascular-treatment-with-the-parallel-graft-technique-from-the-aortic-arch-to-the-iliac-axis
#5
Gian F Fadda, Mario Marino, Holta Kasemi, Costantino L DI Angelo, Carlo P Dionisi, Valeria Cammalleri, Carlo Setacci
BACKGROUND: The chimney technique has been developed for the treatment of complex aortic aneurysms. We analyzed the midterm to long-term outcomes of this approach from a single- centre experience. METHODS: From October 2008 to July 2016, 58 patients underwent endovascular aortic aneurysm repair using the chimney technique. Indications for treatment were thoracic aortic aneurysm (TAA) (n = 11), thoracoabdominal aortic aneurysm (TAAA) (n = 2), pararenal aortic aneurysm (PAAA) (n= 15), aortoiliac/isolated hypogastric artery aneurysm (n = 25), type I endoleak after previous TEVAR/EVAR (n=4), proximal pseudoaneurysm after AAA open repair (n = 1)...
May 26, 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28546757/microrna-381-enhances-radiosensitivity-in-esophageal-squamous-cell-carcinoma-by-targeting-x-linked-inhibitor-of-apoptosis-protein
#6
Suna Zhou, Yaoyou Cui, Dequan Yu, Jun Liang, Mingxin Zhang, Wenguang Ye
BACKGROUND: Increasing evidence indicates that radioresistance remains a major problem in the treatment of patients with esophageal squamous cell carcinoma (ESCC). This study was designed to investigate the expression of microRNA-381 (miR-381) and its function in the radioresistance of ESCC. METHODS: In this study, miR-381 expression was first detected in ESCC cell lines and tissue samples by quantitative real-time polymerase chain reaction (qRT-PCR). Then, the effects of miR-381 expression on growth, apoptosis, and radiosensitivity of ESCC cells were analyzed by MTT, colony formation, and flow cytometry, respectively...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28546042/occluded-superficial-femoral-artery-used-for-emergency-reconstruction-a-consecutive-case-series-about-the-proper-conduit-technique
#7
M S Marsman, A Kh Jahrome, F L Moll, G G Koning
INTRODUCTION: Deep wound infections in the groin region can result in an acute or life threatening condition. Especially when there is no suitable vein available because of many reasons (e.g. previous surgery, small vessel diameter). Synthetic prosthesis sometimes are not 'first-choice-technique' because of contamination or infection. It was ad hoc hypothesized in an acute setting that a segment of an occluded Superficial Femoral Artery (SFA) could be used as a conduit in combination with eversion technique, known from carotid surgery...
May 22, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28543048/estimating-demographic-contributions-to-effective-population-size-in-an-age-structured-wild-population-experiencing-environmental-and-demographic-stochasticity
#8
Amanda E Trask, Eric M Bignal, Davy I McCracken, Stuart B Piertney, Jane M Reid
1.A population's effective size (Ne ) is a key parameter that shapes rates of inbreeding and loss of genetic diversity, thereby influencing evolutionary processes and population viability. However estimating Ne , and identifying key demographic mechanisms that underlie the Ne to census population size (N) ratio, remains challenging, especially for small populations with overlapping generations and substantial environmental and demographic stochasticity and hence dynamic age-structure. 2.A sophisticated demographic method of estimating Ne /N, which uses Fisher's reproductive value to account for dynamic age-structure, has been formulated...
May 24, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28542787/understanding-the-reconstitution-of-the-b-cell-compartment-in-bone-marrow-and-blood-after-treatment-for-b-cell-precursor-acute-lymphoblastic-leukaemia
#9
Prisca M J Theunissen, Anouk van den Branden, Alita Van Der Sluijs-Gelling, Valerie De Haas, Auke Beishuizen, Jacques J M van Dongen, Vincent H J Van Der Velden
A better understanding of the reconstitution of the B-cell compartment during and after treatment in B-cell precursor acute lymphoblastic leukaemia (BCP-ALL) will help to assess the immunological status and needs of post-treatment BCP-ALL patients. Using 8-colour flow cytometry and proliferation-assays, we studied the composition and proliferation of both the B-cell precursor (BCP) population in the bone marrow (BM) and mature B-cell population in peripheral blood (PB) during and after BCP-ALL therapy. We found a normal BCP differentiation pattern and a delayed formation of classical CD38(dim) -naive mature B-cells, natural effector B-cells and memory B-cells in patients after chemotherapy...
May 25, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28538580/what-s-new-in-cleft-palate-and-velopharyngeal-dysfunction-management
#10
Sanjay Naran, Matthew Ford, Joseph E Losee
LEARNING OBJECTIVES: After studying this article, the participant should be able to: 1. Have a clear understanding of the evolution of concepts of velopharyngeal dysfunction, especially as it relates to patients with a cleft palate. 2. Explain the subjective and objective evaluation of speech in children with velopharyngeal dysfunction. 3. On the basis of these diagnostic findings, be able to classify types of velopharyngeal dysfunction. 4. Develop a safe, evidence-based, patient-customized treatment plan for velopharyngeal dysfunction founded on objective considerations...
June 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28529671/the-advection-of-microparticles-mcf-7-and-mda-mb-231-breast-cancer-cells-in-response-to-very-low-reynolds-numbers
#11
Sinéad T Morley, Michael T Walsh, David T Newport
The lymphatic system is an extensive vascular network that serves as the primary route for the metastatic spread of breast cancer cells (BCCs). The dynamics by which BCCs travel in the lymphatics to distant sites, and eventually establish metastatic tumors, remain poorly understood. Particle tracking techniques were employed to analyze the behavior of MCF-7 and MDA-MB-231 BCCs which were exposed to lymphatic flow conditions in a 100 μm square microchannel. The behavior of the BCCs was compared to rigid particles of various diameters (η = dp/H= 0...
May 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28529384/the-pelskin-project-part-v-towards-the-control-of-the-flow-around-aerofoils-at-high-angle-of-attack-using-a-self-activated-deployable-flap
#12
Marco E Rosti, Laura Kamps, Christoph Bruecker, Mohammad Omidyeganeh, Alfredo Pinelli
During the flight of birds, it is often possible to notice that some of the primaries and covert feathers on the upper side of the wing pop-up under critical flight conditions, such as the landing approach or when stalking their prey (see Fig. 1) . It is often conjectured that the feathers pop up plays an aerodynamic role by limiting the spread of flow separation . A combined experimental and numerical study was conducted to shed some light on the physical mechanism determining the feathers self actuation and their effective role in controlling the flow field in nominally stalled conditions...
2017: Meccanica
https://www.readbyqxmd.com/read/28523375/a-model-for-one-dimensional-morphoelasticity-and-its-application-to-fibroblast-populated-collagen-lattices
#13
Shakti N Menon, Cameron L Hall, Scott W McCue, D L Sean McElwain
The mechanical behaviour of solid biological tissues has long been described using models based on classical continuum mechanics. However, the classical continuum theories of elasticity and viscoelasticity cannot easily capture the continual remodelling and associated structural changes in biological tissues. Furthermore, models drawn from plasticity theory are difficult to apply and interpret in this context, where there is no equivalent of a yield stress or flow rule. In this work, we describe a novel one-dimensional mathematical model of tissue remodelling based on the multiplicative decomposition of the deformation gradient...
May 18, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28521731/working-in-dissonance-experiences-of-work-instability-in-workers-with-common-mental-disorders
#14
Louise Danielsson, Monica Bertilsson, Kristina Holmgren, Gunnel Hensing
BACKGROUND: Common mental disorders have a negative impact on work functioning, but less is known about the process when the functioning starts to destabilize. This study explores experiences of work instability in workers with common mental disorders. METHODS: A grounded theory study using a theoretical sampling frame, individual in-depth interviews and a constant comparative analysis conducted by a multidisciplinary research team. The sample involved 27 workers with common mental disorders, currently working full or part time, or being on sick leave not more than 6 months...
May 18, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28518124/direct-re-implantation-of-left-coronary-artery-into-the-aorta-in-adults-with-anomalous-origin-of-left-coronary-artery-from-the-pulmonary-artery-alcapa
#15
Reza Tavakoli, Peiman Jamshidi, Nassrin Yamani, Max Gassmann
Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital anomaly which is one of leading causes of myocardial ischemia and infarction in children. If left untreated, it results in a 90% mortality rate in the first year of life. In patients who survive to the adulthood, the coronary steal phenomenon and retrograde left-sided coronary flow provide a substrate for chronic subendocardial ischemia, which may lead to left ventricular dysfunction, ischemic mitral regurgitation, malignant ventricular arrhythmias, and sudden cardiac death...
April 24, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28517553/ifi16-reduced-expression-is-correlated-with-unfavorable-outcome-in-chronic-lymphocytic-leukemia
#16
Pier Paolo Piccaluga, Claudio Agostinelli, Simona Righi, Maria Ciccone, Maria Carla Re, Giuseppina Musumeci, Erica Diani, Caterina Signoretto, Isabella Bon, Ottavio Piccin, Antonio Cuneo, Claudio Tripodo, Cristina Ponti, Donato Zipeto, Santo Landolfo, Davide Gibellini
Chronic lymphocytic leukemia (CLL) is the most common leukemia in adults. Its clinical course is typically indolent; however, based on a series of pathobiological, clinical, genetic, and phenotypic parameters, patient survival varies from less than 5 to more than 20 years. In this paper, we show for the first time that the expression of the interferon-inducible DNA sensor IFI16, a member of the PYHIN protein family involved in proliferation inhibition and apoptosis regulation, is associated with the clinical outcome in CLL...
May 18, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28515329/inference-of-facultative-mobility-in-the-enigmatic-ediacaran-organism-parvancorina
#17
Simon A F Darroch, Imran A Rahman, Brandt Gibson, Rachel A Racicot, Marc Laflamme
Establishing how Ediacaran organisms moved and fed is critical to deciphering their ecological and evolutionary significance, but has long been confounded by their non-analogue body plans. Here, we use computational fluid dynamics to quantitatively analyse water flow around the Ediacaran taxon Parvancorina, thereby testing between competing models for feeding mode and mobility. The results show that flow was not distributed evenly across the organism, but was directed towards localized areas; this allows us to reject osmotrophy, and instead supports either suspension feeding or detritivory...
May 2017: Biology Letters
https://www.readbyqxmd.com/read/28502893/the-effect-of-exhalation-flow-on-endogenous-particle-emission-and-phospholipid-composition
#18
Per Larsson, Björn Bake, Anita Wallin, Oscar Hammar, Ann-Charlotte Almstrand, Mona Lärstad, Evert Ljungström, Ekaterina Mirgorodskaya, Anna-Carin Olin
Exhaled particles constitute a micro-sample of respiratory tract lining fluid. Inhalations from low lung volumes generate particles in small airways by the airway re-opening mechanism. Forced exhalations are assumed to generate particles in central airways by mechanisms associated with high air velocities. To increase knowledge on how and where particles are formed, different breathing manoeuvres were compared in 11 healthy volunteers. Particles in the 0.41-4.55μm diameter range were characterised and sampled...
May 11, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28500645/development-and-validation-of-an-lc-esi-ms-ms-approach-to-determinate-a-highly-hydrophobic-drug-norcantharidin-palmitate-and-apply-to-a-preliminary-pharmacokinetic-study-in-rats
#19
Xiaolin Liu, Xiaoguang Tao, Qi Zheng, Hang Xu, Yu Zhang, Tian Lei, Tian Yin, Haibing He, Xing Tang
In order to investigate the pharmacokinetics of norcantharidin palmitate (NCTD-PAL) in rats, we developed and validated an LC-ESI-MS/MS method. The NCTD-PAL and internal standard (Triamcinoloneacetonide palmitate, TAP) were separated on a Phenomenex Kinetex®XB C18 column, and the mobile phase was composed of tetrahydrofuran (THF)-acetonitrile (20/80, v/v) and an aqueous phase containing 0.2% ammonium hydroxide at a flow rate of 0.3 mL/min. The ESI interface operated in positive mode was used to acquire the mass spectrometric data, and the transition ions were m/z 635...
May 12, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28499668/a-multicenter-feasibility-study-on-ultrafiltration-via-a-single-peripheral-venous-access-in-acute-heart-failure-with-overt-fluid-overload
#20
Marco Morpurgo, Mario Pasqualini, Maria Cristiana Brunazzi, Gabriele Vianello, Roberto Valle, Loris Roncon, Fulvio Fiorini, Nadia Aspromonte, Mario Barbiero, Marco Goldoni, Giancarlo Marenzi
OBJECTIVES: The need for a central venous catheter has limited the widespread use of ultrafiltration in daily clinical practice for the treatment of acute heart failure (AHF) with overt fluid overload. We evaluated the feasibility of a new ultrafiltration device, the CHIARA (Congestive Heart Impairment Advanced Removal Approach) system, that utilizes a single-lumen cannula (17G, multi-hole) inserted in a peripheral vein of the arm. METHODS: In this multicenter, prospective, feasibility study, consecutive ultrafiltration treatments (lasting ≥6 hours and with an ultrafiltration rate ≥100ml/h) with the CHIARA device and a single peripheral venous approach were performed at 6 Italian hospitals...
May 2, 2017: International Journal of Cardiology
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