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https://www.readbyqxmd.com/read/28921773/performance-of-aneuploid-backcross-hybrids-between-the-crop-brassica-napus-and-its-wild-relative-b-rapa
#1
Tom J de Jong, Karla Escobedo Quevedo, Karin C A M van der Veen-van Wijk, Mahmoud Moshgani
Crossings between the diploid wild Brassica rapa (AA, 2n=20) and the tetraploid cultivar B. napus (AACC, 2n=38) can readily be made. Backcrosses to the wild B. rapa (BC1 ) produce aneuploids with variable chromosome numbers between 20 and 29. How does survival and performance relate to DNA content of plants? Growth of the BC1 plants was measured in the lab. One plant in the F1 self-pollinated spontaneously and produced abundant F2 seeds that were also examined. The number of C-chromosomes was estimated from DNA-values obtained with flow cytometry...
September 16, 2017: Plant Biology
https://www.readbyqxmd.com/read/28917725/a-computational-approach-for-phenotypic-comparisons-of-cell-populations-in-high-dimensional-cytometry-data
#2
Ludovic Platon, David Pejoski, Guillaume Gautreau, Brice Targat, Roger Le Grand, Anne-Sophie Beignon, Nicolas Tchitchek
BACKGROUND: Cytometry is an experimental technique used to measure molecules expressed by cells at a single cell resolution. Recently, several technological improvements have made possible to increase greatly the number of cell markers that can be simultaneously measured. Many computational methods have been proposed to identify clusters of cells having similar phenotypes. Nevertheless, only a limited number of computational methods exist to compare the phenotypes of the cell clusters identified by different clustering approaches...
September 13, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28916174/evaluation-of-beat-to-beat-ventricular-repolarization-lability-from-standard-12-lead-ecg-during-acute-myocardial-ischemia
#3
Salah S Al-Zaiti, Mohammad Alrawashdeh, Christian Martin-Gill, Clifton Callaway, David Mortara, Jan Nemec
BACKGROUND: Acute myocardial ischemia is a common cause of ventricular arrhythmias, yet recent ECG methods predicting susceptibility to ventricular tachyarrhythmia have not been fully evaluated during spontaneous ischemia. We sought to evaluate the clinical utility of alternans and non-alternans components of repolarization variability from the standard 10-second 12-lead ECG signals to risk stratify patients with acute chest pain. METHODS: We enrolled consecutive, non-traumatic, chest pain patients transported through Emergency Medical Services (EMS) to three tertiary care hospitals with cardiac catheterization lab capabilities in Pittsburgh, PA...
August 10, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28913587/isotopic-effects-of-pce-induced-by-organohalide-respiring-bacteria
#4
Simon Leitner, Harald Berger, Markus Gorfer, Thomas G Reichenauer, Andrea Watzinger
Reductive dechlorination performed by organohalide-respiring bacteria (OHRB) enables the complete detoxification of certain emerging groundwater pollutants such as perchloroethene (PCE). Environmental samples from a contaminated site incubated in a lab-scale microcosm (MC) study enable documentation of such reductive dechlorination processes. As compound-specific isotope analysis is used to monitor PCE degradation processes, nucleic acid analysis-like 16S-rDNA analysis-can be used to determine the key OHRB that are present...
September 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28912115/system-wide-inpatient-portal%C3%A2-implementation-survey-of-health-care-team-perceptions
#5
Jennifer L Hefner, Cynthia J Sieck, Daniel M Walker, Timothy R Huerta, Ann Scheck McAlearney
BACKGROUND: Inpatient portals, a new type of patient portal tailored specifically to the hospital setting, can allow patients to access up-to-date health information and exchange secure communications with their care team. As such, inpatient portals present an opportunity for patients to increase engagement in their care during a time of acute crisis that emphasizes focus on a patient's health. While there is a large body of research on patient portals in the outpatient setting, questions are being raised specifically about inpatient portals, such as how they will be incorporated into the flow of patient care in hectic, stressed, team-based hospital settings...
September 14, 2017: JMIR Medical Informatics
https://www.readbyqxmd.com/read/28912083/nasogastric-decompression-not-associated-with-a-reduction-in-surgery-or-bowel-ischemia-for-acute-small-bowel-obstruction
#6
Daniel J Berman, Hamza Ijaz, Mohammad Alkhunaizi, Paige E Kulie, Khashayar Vaziri, Lorna M Richards, Andrew C Meltzer
OBJECTIVES: Small bowel obstructions (SBOs) occur 300,000 times annually leading to $1.3 billion in cost. Approximately 20% of patients require a laparotomy to manage the obstruction and either prevent or treat intestinal ischemia. Early management may play a role in reducing these complications. Nasogastric decompression is commonly used for early management. Our primary objective was to determine if NGD was associated with lower rates of surgery, bowel ischemia or length of stay. METHODS: We retrospectively enrolled 181 ED patients with SBO from 9/2013 to 9/2015 in order to determine if nasogastric decompression was associated with a reduction in rates of surgery, bowel ischemia or hospital length of stay...
August 15, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28911767/binding-isotope-effects-for-interrogating-enzyme-substrate-interactions
#7
Christopher F Stratton, Myles B Poulin, Vern L Schramm
Equilibrium binding isotope effects (BIEs) report on the bond vibrational status of enzyme substrates in the Michaelis complex prior to the transition state and how they differ from the solution state. Accordingly, BIEs provide an experimental means of interrogating enzyme-substrate interactions and inform on the influence of enzyme-mediated atomic distortions in modulating substrate reactivity. In this chapter, we outline a rapid equilibrium dialysis method that our lab has used to measure BIEs for several enzyme systems...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28910351/lab-meets-real-life-a-laboratory-assessment-of-spontaneous-thought-and-its-ecological-validity
#8
Christine Kuehner, Annett Welz, Iris Reinhard, Georg W Alpers
People's minds frequently wander towards self-generated thoughts, which are unrelated to external stimuli or demands. These phenomena, referred to as "spontaneous thought" (ST) and "mind wandering" (MW), have previously been linked with both costs and benefits. Current assessments of ST and MW have predominantly been conducted in the laboratory, whereas studies on the ecological validity of such lab-related constructs and their interrelations are rare. The current study examined the stability of ST dimensions assessed in the lab and their predictive value with respect to MW, repetitive negative thought (uncontrollable rumination, RUM), and affect in daily life...
2017: PloS One
https://www.readbyqxmd.com/read/28906279/the-value-of-point-of-care-cd4-and-laboratory-viral-load-in-tailoring-antiretroviral-therapy-monitoring-strategies-to-resource-limitations
#9
Emily P Hyle, Ilesh V Jani, Katherine L Rosettie, Robin Wood, Benjamin Osher, Stephen Resch, Pamela P Pei, Paolo Maggiore, Kenneth A Freedberg, Trevor Peter, Robert A Parker, Rochelle P Walensky
OBJECTIVE: To examine the clinical and economic value of point-of-care CD4 (POC-CD4) or viral load monitoring compared with current practices in Mozambique, a country representative of the diverse resource limitations encountered by HIV treatment programs in sub-Saharan Africa. DESIGN/METHODS: We use the Cost-Effectiveness of Preventing AIDS Complications-International model to examine the clinical impact, cost (2014 US$), and incremental cost-effectiveness ratio [$/year of life saved (YLS)] of ART monitoring strategies in Mozambique...
September 24, 2017: AIDS
https://www.readbyqxmd.com/read/28905327/development-of-a-mini-freeze-dryer-for-material-sparing-laboratory-processing-with-representative-product-temperature-history
#10
Wasfy M Obeidat, Ekneet Sahni, William Kessler, Michael Pikal
The goal of the work described in this publication was to evaluate a new, small, material-sparing freeze dryer, denoted as the "mini-freeze dryer or mini-FD", capable of reproducing the product temperature history of larger freeze dryers, thereby facilitating scale-up. The mini-FD wall temperatures can be controlled to mimic loading procedures and dryer process characteristics of larger dryers. The mini-FD is equipped with a tunable diode laser absorption spectroscopy (TDLAS) water vapor mass flow monitor and with other advanced process analytical technology (PAT) sensors...
September 13, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28900664/-prehospital-care-for-stroke-patients
#11
REVIEW
C H Nolte, H J Audebert
The effectiveness of thrombolysis or mechanical recanalization for acute stroke is higher, the sooner these therapies are started. Therefore, acute stroke patients need to be evaluated by qualified staff for these therapies as soon as possible. Lay persons need to identify the typical symptoms of stroke as an emergency and act accordingly by calling the emergency medical system (EMS). The EMS team reassesses the symptoms and prompts cerebral imaging. Cerebral imaging is performed ideally in hospitals with a stroke unit where subsequent (stroke) treatments occur...
September 12, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/28900522/point-shear-wave-ultrasound-elastography-with-esaote-compared-to-real-time-2d-shear-wave-elastography-with-supersonic-imagine-for-the-quantification-of-liver-stiffness
#12
L Mulazzani, V Salvatore, F Ravaioli, G Allegretti, F Matassoni, R Granata, A Ferrarini, H Stefanescu, Fabio Piscaglia
PURPOSE: Different shear wave elastography (SWE) machines able to quantify liver stiffness (LS) have been recently introduced by various companies. The aim of this study was to investigate the agreement between point SWE with Esaote MyLab Twice (pSWE.ESA) and 2D SWE with Aixplorer SuperSonic (2D SWE.SSI). Moreover, we assessed the correlation of these machines with Fibroscan in a subgroup of patients. METHODS: A total of 81 liver disease patients and 27 subjects without liver disease accessing the ultrasound lab were considered...
September 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/28895417/the-prognostic-value-of-pre-treatment-thrombocytosis-in-two-cohorts-of-patients-with-non-small-cell-lung-cancer-treated-with-curatively-intended-chemoradiotherapy
#13
G Holgersson, S BergstrOm, A Hallqvist, P Liv, J Nilsson, L WillEn, J Nyman, S Ekman, R Henriksson, M Bergqvist
Chemoradiotherapy is the standard of care for inoperable stage III non-small cell lung cancer (NSCLC). This treatment, however, offers only a small chance of cure and is associated with many side effects. Little research has been made concerning which patients benefit most/least from the treatment. The present study evaluates the prognostic value of anemia, leukocytosis and thrombocytosis at diagnosis in this treatment setting. In the present study, data were collected retrospectively for 222 patients from two different phase II studies conducted between 2002-2007 in Sweden with patients treated with chemoradiotherapy for stage IIIA-IIIB NSCLC...
September 12, 2017: Neoplasma
https://www.readbyqxmd.com/read/28892092/high-concordance-of-a-closed-system-rt-qpcr-breast-cancer-assay-for-her2-mrna-compared-to-clinically-determined-immunohistochemistry-fluorescence-in-situ-hybridization-and-quantitative-immunofluorescence
#14
Brad E Wasserman, Daniel E Carvajal-Hausdorf, Kenneth Ho, Wendy Wong, Natalie Wu, Victor C Chu, Edwin W Lai, Jodi M Weidler, Michael Bates, Veronique Neumeister, David L Rimm
Historically, mRNA measurements have been tested on several commercially available platforms, but none have gained broad acceptance for assessment of HER2. An mRNA measurement, as a continuous value, has the potential for use in adjudication of the equivocal category. Here we use a real-time quantitative reverse transcription polymerase chain reaction (RT-qPCR) assay in a closed, single-use cartridge, automated system. Multiple cores (1 mm in diameter) were retrospectively collected from 80 formalin-fixed paraffin-embedded (FFPE) tissue blocks with invasive breast cancer seen by Yale Pathology Labs between 1998 and 2011...
September 11, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28889209/micro-bead-injection-spectroscopy-for-label-free-automated-determination-of-immunoglobulin-g-in-human-serum
#15
Inês I Ramos, Luís M Magalhães, Luisa Barreiros, Salette Reis, José L F C Lima, Marcela A Segundo
Immunoglobulin G (IgG) represents the major fraction of antibodies in healthy adult human serum, and deviations from physiological levels are a generic marker of disease corresponding to different pathologies. Therefore, screening methods for IgG evaluation are a valuable aid to diagnostics. The present work proposes a rapid, automatic, and miniaturized method based on UV-vis micro-bead injection spectroscopy (μ-BIS) for the real-time determination of human serum IgG with label-free detection. Relying on attachment of IgG in rec-protein G immobilized in Sepharose 4B, a bioaffinity column is automatically assembled, where IgG is selectively retained and determined by on-column optical density measurement...
September 9, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28887910/robust-multi-objective-global-optimization-of-stochastic-processes-with-a-case-study-in-gradient-elution-chromatography
#16
Lars Freier, Eric von Lieres
A novel algorithm for robust multi-objective process optimization under stochastic variability of environmental variables is introduced and applied to a case study in gradient elution chromatography. Process variability is accounted for by simultaneously optimizing several scenarios with random but fixed values of the environmental variables. These iterative optimizations are synchronized by planning the same experiments for all scenarios. Experiments are designed by maximizing the cumulative expected hypervolume improvement as predicted by several Gaussian process regression models...
September 9, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28881265/new-variants-near-rhoj-and-c2-hla-dra-region-and-susceptibility-to-endometriosis-in-the-polish-population-the-genome-wide-association-study
#17
Marta Sobalska-Kwapis, Beata Smolarz, Marcin Słomka, Tomasz Szaflik, Ewa Kępka, Bartosz Kulig, Anna Siewierska-Górska, Grzegorz Polak, Hanna Romanowicz, Dominik Strapagiel, Krzysztof Szyłło
OBJECTIVE: Endometriosis is a common gynaecological disease, associated with severe pelvic pain and reduced fertility; however, molecular mechanisms remain largely unknown. Genome-wide association studies (GWAS) are able to identify genetic loci, which can play significant role during endometriosis development. AIM: The study aimed at localisation of new genes and chromosomal loci, the nucleotide variants of which determine the level of susceptibility to endometriosis...
September 1, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28877184/microgravity-validation-of-a-novel-system-for-rna-isolation-and-multiplex-quantitative-real-time-pcr-analysis-of-gene-expression-on-the-international-space-station
#18
Macarena Parra, Jimmy Jung, Travis D Boone, Luan Tran, Elizabeth A Blaber, Mark Brown, Matthew Chin, Tori Chinn, Jacob Cohen, Robert Doebler, Dzung Hoang, Elizabeth Hyde, Matthew Lera, Louie T Luzod, Mark Mallinson, Oana Marcu, Youssef Mohamedaly, Antonio J Ricco, Kathleen Rubins, Gregory D Sgarlato, Rafael O Talavera, Peter Tong, Eddie Uribe, Jeffrey Williams, Diana Wu, Rukhsana Yousuf, Charles S Richey, Julie Schonfeld, Eduardo A C Almeida
The International Space Station (ISS) National Laboratory is dedicated to studying the effects of space on life and physical systems, and to developing new science and technologies for space exploration. A key aspect of achieving these goals is to operate the ISS National Lab more like an Earth-based laboratory, conducting complex end-to-end experimentation, not limited to simple microgravity exposure. Towards that end NASA developed a novel suite of molecular biology laboratory tools, reagents, and methods, named WetLab-2, uniquely designed to operate in microgravity, and to process biological samples for real-time gene expression analysis on-orbit...
2017: PloS One
https://www.readbyqxmd.com/read/28870699/enhancing-recovery-of-recombinant-hepatitis-b-surface-antigen-in-lab-scale-and-large-scale-anion-exchange-chromatography-by-optimizing-the-conductivity-of-buffers
#19
Gol Mohammad Mojarrad Moghanloo, Maryam Khatami, Amin Javidanbardan, Seyed Nezamedin Hosseini
In biopharmaceutical science, ion-exchange chromatography (IEC) is a well-known purification technique to separate the impurities such as host cell proteins from recombinant proteins. However, IEC is one of the limiting steps in the purification process of recombinant hepatitis B surface antigen (rHBsAg), due to its low recovery rate (<50%). In the current study, we hypothesized that ionic strengths of IEC buffers are easy-to-control parameters which can play a major role in optimizing the process and increasing the recovery...
September 1, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28866737/a-frailty-index-from-common-clinical-and-laboratory-tests-predicts-increased-risk-of-death-across-the-life-course
#20
Joanna M Blodgett, Olga Theou, Susan E Howlett, Kenneth Rockwood
A frailty index (FI) based entirely on common clinical and laboratory tests might offer scientific advantages in understanding ageing and pragmatic advantages in screening. Our main objective was to compare an FI based on common laboratory tests with an FI based on self-reported data; we additionally investigated if the combination of subclinical deficits with clinical ones increased the ability of the FI to predict mortality. In this secondary analysis of the 2003-2004 and 2005-2006 National Health and Nutrition Examination Survey data, 8888 individuals aged 20+ were evaluated...
September 2, 2017: GeroScience
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