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https://www.readbyqxmd.com/read/28822574/analysis-of-individual-and-total-microcystins-in-surface-water-by-on-line-preconcentration-and-desalting-coupled-to-liquid-chromatography-tandem-mass-spectrometry
#1
Gabriel Munoz, Sung Vo Duy, Audrey Roy-Lachapelle, Barry Husk, Sébastien Sauvé
A fast and high-throughput method is proposed for the determination of total microcystins (ΣMC) in environmental surface waters. After a 1-h Lemieux-von Rudloff oxidation step to yield the 2-methyl-3-methoxy-4-phenylbutyric acid (MMPB) moiety, samples were quenched, filtered, and directly analyzed. This was achieved via solid phase extraction (SPE) coupled on-line to ultra-high performance liquid chromatography electrospray ionization triple stage quadrupole mass spectrometry. The choice of on-line SPE settings was conducted using experimental designs...
August 5, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28822455/-feasibility-analysis-of-predicting-the-risk-of-pancreatic-fistula-after-pancreatoduodenectomy-by-preoperative-ct
#2
M Yu, Y D Wang, H Z Xue, Q Shen, J Xu, X Zhang, J K Jia, M Jia
Objective: To study the preoperative computed tomography (CT) data of patients with pancreaticoduodenectomy (PD) and to explore the effective of predicting the risk of postoperative pancreatic fistula (POPF). Methods: CT images of patients with PD were analyzed retrospectively from June 2010 to January 2017 in Zhengzhou University of People's Hospital. The pancreas index, pancreatic duct width, pancreas CT value, pancreas-spleen CT value, and pancreas thickness were collected. The relationship between the indicators and the POPF was determined, and the receiver operation characteristic (ROC) curve was calculated and the area under the curve (AUC) was evaluated...
August 8, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28822211/healthcare-students-interprofessional-critical-event-disaster-response-course
#3
Tae Eung Kim, Tamara Shankel, Ellen T Reibling, Jacqueline Paik, Dolores Wright, Michelle Buckman, Kathi Wild, Ehren Ngo, Alireza Hayatshahi, Lee H Nguyen, T Kent Denmark, Tamara L Thomas
OBJECTIVE: Numerous disasters confirm the need for critical event training in healthcare professions. However, no single discipline works in isolation and interprofessional learning is recognized as a necessary component. An interprofessional faculty group designed a learning curriculum crossing professional schools. DESIGN: Faculty members from four healthcare schools within the university (nursing, pharmacy, allied health, and medicine) developed an interdisciplinary course merging both published cross-cutting competencies for critical event response and interprofessional education competencies...
January 2017: American Journal of Disaster Medicine
https://www.readbyqxmd.com/read/28821973/bilirubin-in-the-early-course-of-venovenous-extracorporeal-membrane-oxygenation-support-for-refractory-ards
#4
Chiara Lazzeri, Manuela Bonizzoli, Giovanni Cianchi, Stefano Batacchi, Marco Chiostri, Giorgio Enzo Fulceri, Laura Tadini Buoninsegni, Adriano Peris
Bilirubin is known as a marker of hepatic dysfunction and is incorporated in scoring algorithms to assess prognosis in critically ill patients. No data are so far available on the prognostic role of hepatic dysfunction in patients with severe ARDS on venovenous extracorporeal membrane oxygenation (VV-ECMO) support. In 112 consecutive patients with severe ARDS treated with VV-ECMO, we aimed at assessing whether increased bilirubin during the first 72 h could affect early death. Increased serum bilirubin (≥1...
August 18, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28821289/transcriptome-wide-analyses-indicate-mitochondrial-responses-to-particulate-air-pollution-exposure
#5
Ellen Winckelmans, Tim S Nawrot, Maria Tsamou, Elly Den Hond, Willy Baeyens, Jos Kleinjans, Wouter Lefebvre, Nicolas Van Larebeke, Martien Peusens, Michelle Plusquin, Hans Reynders, Greet Schoeters, Charlotte Vanpoucke, Theo M de Kok, Karen Vrijens
BACKGROUND: Due to their lack of repair capacity mitochondria are critical targets for environmental toxicants. We studied genes and pathways reflecting mitochondrial responses to short- and medium-term PM10 exposure. METHODS: Whole genome gene expression was measured in peripheral blood of 98 adults (49% women). We performed linear regression analyses stratified by sex and adjusted for individual and temporal characteristics to investigate alterations in gene expression induced by short-term (week before blood sampling) and medium-term (month before blood sampling) PM10 exposure...
August 18, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28821076/confirmation-and-measurement-of-hydrophobic-interaction-in-sol-gel-system-of-konjac-glucomannan-with-different-degree-of-deacetylation
#6
Chen Xin, Jian Chen, Hongshan Liang, Jiawei Wan, Jing Li, Bin Li
Fluorescence measurement was used as a tool to study the hydrophobic interaction in sol-gel system of konjac glucomannan (KGM) with different degree of deacetylation (DD). In the concentration from 0 to 10g/L, I1/I3 ratio of native KGM declined from 1.75 to 1.25. Before and after heating, the critical associating concentration of the native KGM was 0.60g/L and 0.95g/L respectively, but this value of deacetylated KGM (DD=32.58%) was 0.58g/L and 0.45g/L respectively. The addition of Na2SO4 and NaSCN exhibited more significant influence on deacetylated KGM compared with native KGM...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820660/driver-s-mental-workload-prediction-model-based-on-physiological-indices
#7
Shengyuan Yan, Cong Chi Tran, Yingying Wei, Jean Luc Habiyaremye
Developing an early warning model to predict the driver's mental workload (MWL) is critical and helpful, especially for new or less experienced drivers. The present study aims to investigate the correlation between new driver's MWL and their work performance, regarding the number of errors. Additionally, the Group method of data handling (GMDH) is used to establish the driver's MWL predictive model based on subjective rating (NASA task load index (NASA-TLX)) and six physiological indices. The results indicate that NASA-TLX and the number of errors are positively correlated, and the predictive model shows the validity of the proposed model with an R(2) value of 0...
August 18, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28820316/cell-cycle-related-metabolism-and-mitochondrial-dynamics-in-a-replication-competent-pancreatic-beta-cell-line
#8
Chiara Montemurro, Suryakiran Vadrevu, Tatyana Gurlo, Alexandra E Butler, Kenny E Vongbunyong, Anton Petcherski, Orian S Shirihai, Leslie S Satin, Daniel Braas, Peter C Butler, Slavica Tudzarova
Cell replication is a fundamental attribute of growth and repair in multicellular organisms. Pancreatic beta-cells in adults rarely enter cell cycle, hindering the capacity for regeneration in diabetes. Efforts to drive beta-cells into cell cycle have so far largely focused on regulatory molecules such as cyclins and cyclin-dependent kinases (CDKs). Investigations in cancer biology have uncovered that adaptive changes in metabolism, the mitochondrial network, and cellular Ca(2+) are critical for permitting cells to progress through the cell cycle...
August 18, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28820277/natural-phospholipids-occurrence-biosynthesis-separation-identification-and-beneficial-health-aspects
#9
Abdelmoneim H Ali, Xiaoqiang Zou, Sherif M Abed, Sameh A Korma, Qingzhe Jin, Xingguo Wang
During the last years, phospholipids (PLs) have attracted great attention because of their crucial roles in providing nutritional values, technological and medical applications. There are considerable proofs that PLs have unique nutritional benefits on human health, such as reducing cholesterol absorption, improving liver functions, and decreasing the risk of cardiovascular diseases. PLs are the main structural lipid components of cell and organelle membranes in all living organisms, and therefore, they occur in all organisms and the derived food products...
August 18, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28819983/an-evaluation-of-the-effectiveness-of-a-risk-based-monitoring-approach-implemented-with-clinical-trials-involving-implantable-cardiac-medical-devices
#10
Christopher A Diani, Angie Rock, Phil Moll
Background Risk-based monitoring is a concept endorsed by the Food and Drug Administration to improve clinical trial data quality by focusing monitoring efforts on critical data elements and higher risk investigator sites. BIOTRONIK approached this by implementing a comprehensive strategy that assesses risk and data quality through a combination of operational controls and data surveillance. This publication demonstrates the effectiveness of a data-driven risk assessment methodology when used in conjunction with a tailored monitoring plan...
August 1, 2017: Clinical Trials: Journal of the Society for Clinical Trials
https://www.readbyqxmd.com/read/28819920/-no-country-for-old-men-huxley-s-brave-new-world-and-the-value-of-old-age
#11
Maren Linett
This article inserts Aldous Huxley's Brave New World (1932) into a bioethical conversation about the value of old age and old people. Exploring literary treatments of bioethical questions can supplement conversations within bioethics proper, helping to reveal our existing assumptions and clear the way for more considered views; indeed, as Peter Swirski has argued, literary texts can serve as thought experiments that illuminate the ramifications of philosophical ideas. This essay examines the novel's representation of a society without old people in conjunction with ideas about aging and life narratives put forward by philosophers and bioethicists such as Ezekiel Emanuel, Gilbert Meilaender, and Alasdair MacIntyre...
August 17, 2017: Journal of Medical Humanities
https://www.readbyqxmd.com/read/28819391/a-critical-reappraisal-for-the-value-of-tumor-size-as-a-prognostic-variable-in-rectal-adenocarcinoma
#12
Chien-Hsin Chen, Mao-Chih Hsieh, Ping-Kun Hsiao, En-Kwang Lin, Yen-Jung Lu, Szu-Yuan Wu
Background and Objectives: To investigate critical prognostic factors for local recurrence in patients with rectal adenocarcinoma. Methods: We enrolled 221 consecutive patients who had histologically confirmed adenocarcinoma of the rectum and underwent surgery in our hospital between January 2000 and December 2014. Total mesorectal excision was performed in all patients undergoing a sphincter-sparing procedure or abdominal perineal resection of rectal cancer. To evaluate prognostic factors for local recurrence, we performed univariate and multivariate Cox regression analyses of the local recurrence rate in all patients...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819311/the-mechanism-for-the-different-effects-of-texture-on-yield-strength-and-hardness-of-mg-alloys
#13
Feilong Guo, Huihui Yu, Chenyu Wu, Yunchang Xin, Cong He, Qing Liu
A study regarding the effect of texture on tensile yield strength and hardness of an extruded Mg-15Gd-0.5Zr rod was performed, with a great emphasis laid on the relevant mechanisms. A 7% pre-tension along the extrusion direction (ED) in the solid solution condition was used to transform the texture from a broad distribution of basal poles with a peak approximately 45° with respect to the ED into a texture with basal poles largely perpendicular to the ED. This texture variation enhances the yield strength of peak aged sample by approximately 103 MPa, while hardly increases the peak hardness...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819002/feedback-modulation-of-surrounding-pressure-determines-the-onset-of-negative-effort-dependence-in-a-collapsible-tube-bench-model-of-the-pharyngeal-airway
#14
Christopher Lambeth, Benjamin Kolevski, Terence Charles Amis, Kristina Kairaitis
Negative effort dependence (NED), decreased airflow despite increased driving pressure, has been proposed as a specific obstructive sleep apnea (OSA) phenotypic characteristic. We examined conditions under which NED occurs in a collapsible tube, chamber enclosed, pharyngeal airway bench model, focusing on relationships with surrounding pressure levels and longitudinal strain. Using a vacuum source, graded airflows (V ̇, 0-5 L/s) were generated through a thin walled latex tube enclosed within a rigid, cylindrical chamber, sealed with initial chamber pressures (Pci) of 0-5 cmH2O (separate runs), or open to atmosphere...
August 17, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28818688/anodization-of-magnesium-for-biomedical-applications-processing-characterization-degradation-and-cytocompatibility
#15
Aaron F Cipriano, Jiajia Lin, Christopher Miller, Alan Lin, Mayra C Cortez Alcaraz, Pedro Soria, Huinan Liu
This article reports anodization of Mg in KOH electrolyte and the associated surface, degradation, and biological properties for bioresorbable implant applications. The preparation procedures for electrodes and anodization setup significantly enhanced reproducibility of samples. The results of anodization performed at the applied potentials of 1.8, 1.9, or 2.0 V showed that the sample anodized at 1.9 V and annealed, referred to as the 1.9 AA sample, had homogenous surface microstructure and elemental composition, and a reduction in corrosion current density in the electrochemical testing...
August 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28818615/deep-transcriptome-profiling-sheds-light-on-key-players-in-nucleus-implantation-induced-immune-response-in-the-pearl-oyster-pinctada-martensii
#16
Wei Wang, Yuyuan Wu, Qiannan Lei, Haiying Liang, Yuewen Deng
Immunological rejection of the pearl oysters following nucleus implantation is a major issue limiting the successful rate of cultured pearls. To date, the molecular mechanism of immune tolerance during pearl formation in the pearl oysters is still largely unknown. Through the RNA sequencing platform and comparative transcriptomic analysis, we investigated the chronic gene expression changes at seven time points (0, 5, 10, 15, 20, 30, 60 days post implantation or dpi) over a period of 60 days following nucleus implantation in the pearl oyster Pinctada martensii...
August 14, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28818240/reducing-cancer-and-cancer-disparities-lessons-from-a-youth-generated-diabetes-prevention-campaign
#17
Dean Schillinger, Pamela M Ling, Sarah Fine, Cherrie B Boyer, Elizabeth Rogers, Roberto Ariel Vargas, Kirsten Bibbins-Domingo, Wen-Ying Sylvia Chou
Adolescence and young adulthood, a period essential for determining exposures over the life-course, is an ideal time to intervene to lower cancer risk. This demographic group can be viewed as both the target audience and generator of messages for cancer prevention, such as skin cancer, obesity-, tobacco-, and human papillomavirus-related cancers. The purpose of this paper is to encourage innovative health communications that target youth; youth behavior; and the structural, environmental, and social determinants of youth behavior as critical areas of focus for cancer prevention and disparities reduction...
September 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28818013/relationship-between-doppler-findings-and-fetal-brain-apparent-diffusion-coefficient-in-early-onset-intra-uterine-growth-restriction
#18
Mehmet Serdar Kutuk, Murside Sahin, Sureyya Burcu Gorkem, Selim Doganay, Ahmet Ozturk
OBJECTIVE: The aim of the study is to assess the relationship between uteroplacental Doppler sonography findings and cerebral diffusion measured by diffusion-weighted magnetic resonance imaging (DWI) in fetuses with early- onset intrauterine growth restriction (IUGR). MATERIAL AND METHODS: The study included 54 pregnant women with fetal IUGR and 15 healthy controls (n: 15). Fetuses with IUGR were classified into 4 groups based on Doppler findings: group 1 (n = 12), umbilical artery (UA) pulsatility index (PI) >95pc; group 2 (n = 11), UA PI > 95 pc and middle cerebral artery PI <5pc; group 3 (n = 21), absent end-diastolic (A-EDF) in UA; group 4 (n = 10), reversed EDF in UA...
August 17, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28817735/association-of-gene-expression-with-biomass-content-and-composition-in-sugarcane
#19
Nam V Hoang, Agnelo Furtado, Angela J O'Keeffe, Frederik C Botha, Robert J Henry
About 64% of the total aboveground biomass in sugarcane production is from the culm, of which ~90% is present in fiber and sugars. Understanding the transcriptome in the sugarcane culm, and the transcripts that are associated with the accumulation of the sugar and fiber components would facilitate the modification of biomass composition for enhanced biofuel and biomaterial production. The Sugarcane Iso-Seq Transcriptome (SUGIT) database was used as a reference for RNA-Seq analysis of variation in gene expression between young and mature tissues, and between 10 genotypes with varying fiber content...
2017: PloS One
https://www.readbyqxmd.com/read/28817693/clinical-signs-profound-acidemia-hypoglycemia-and-hypernatremia-are-predictive-of-mortality-in-1-400-critically-ill-neonatal-calves-with-diarrhea
#20
Florian M Trefz, Ingrid Lorenz, Annette Lorch, Peter D Constable
Profound acidemia impairs cellular and organ function and consequently should be associated with an increased risk of mortality in critically ill humans and animals. Neonatal diarrhea in calves can result in potentially serious metabolic derangements including profound acidemia due to strong ion (metabolic) acidosis, hyper-D-lactatemia, hyper-L-lactatemia, azotemia, hypoglycemia, hyperkalemia and hyponatremia. The aim of this retrospective study was to assess the prognostic relevance of clinical and laboratory findings in 1,400 critically ill neonatal calves with diarrhea admitted to a veterinary teaching hospital...
2017: PloS One
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