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https://www.readbyqxmd.com/read/28423343/chitosan-as-coagulant-on-cyanobacteria-in-lake-restoration-management-may-cause-rapid-cell-lysis
#1
Maíra Mucci, Natalia Pessoa Noyma, Leonardo de Magalhães, Marcela Miranda, Frank van Oosterhout, Iamê Alves Guedes, Vera L M Huszar, Marcelo Manzi Marinho, Miquel Lürling
Combining coagulant and ballast to remove cyanobacteria from the water column is a promising restoration technique to mitigate cyanobacterial nuisance in surface waters. The organic, biodegradable polymer chitosan has been promoted as a coagulant and is viewed as non-toxic. In this study, we show that chitosan may rapidly compromise membrane integrity and kill certain cyanobacteria leading to release of cell contents in the water. A strain of Cylindrospermopsis raciborskii and one strain of Planktothrix agardhii were most sensitive...
April 10, 2017: Water Research
https://www.readbyqxmd.com/read/28399367/determination-of-in-vitro-and-in-silico-indexes-for-the-modelling-of-blood-brain-barrier-partitioning-of-drugs-via-micellar-and-immobilized-artificial-membrane-liquid-chromatography
#2
Giacomo Russo, Lucia Grumetto, Roman Szucs, Francesco Barbato, Frederic Lynen
In the present work, 79 structurally unrelated analytes were taken into account and their chromatographic retention coefficients, measured by Immobilized Artificial Membrane Liquid Chromatography (IAM-LC), and by Micellar Liquid Chromatography (MLC) employing sodium dodecyl sulfate (SDS) as surfactant, were determined. Such indexes were subsequently used for the development of Blood-Brain Barrier passage-predictive statistical models using partial least square (PLS) regression along with topological and physico-chemical parameters, calculated in silico...
April 11, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28369543/sleep-during-pregnancy-the-numom2b-pregnancy-and-sleep-duration-and-continuity-study
#3
Kathryn J Reid, Francesca L Facco, William A Grobman, Corette B Parker, Marcos Herbas, Shannon Hunter, Robert M Silver, Robert C Basner, George R Saade, Grace W Pien, Shalini Manchanda, Judette M Louis, Chia-Ling Nhan-Chang, Judith H Chung, Deborah A Wing, Hyagriv N Simhan, David M Haas, Jay Iams, Samuel Parry, Phyllis C Zee
Study Objectives: To characterize sleep duration, timing and continuity measures in pregnancy and their association with key demographic variables. Methods: Multi-site prospective cohort study. Women enrolled in the nuMoM2b study (nulliparous women with a singleton gestation) were recruited at the second study visit (16- 21 weeks of gestation) to participate in the Sleep Duration and Continuity Substudy. Women <18 years of age, or with pregestational diabetes or chronic hypertension were excluded from participation...
March 24, 2017: Sleep
https://www.readbyqxmd.com/read/28362413/assessing-cardiomyocyte-subtypes-following-transcription-factor-mediated-reprogramming-of-mouse-embryonic-fibroblasts
#4
Antonio Fernandez-Perez, Nikhil V Munshi
Direct reprogramming of one cell type into another has recently emerged as a powerful paradigm for regenerative medicine, disease modeling, and lineage specification. In particular, the conversion of fibroblasts into induced cardiomyocyte-like myocytes (iCLMs) by Gata4, Hand2, Mef2c, and Tbx5 (GHMT) represents an important avenue for generating de novo cardiac myocytes in vitro and in vivo. Recent evidence suggests that GHMT generates a greater diversity of cardiac subtypes than previously appreciated, thus underscoring the need for a systematic approach to conducting additional studies...
March 22, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28355631/persistent-illusory-apparent-motion-in-sequences-of-uncorrelated-random-dots
#5
Nicolas Davidenko, Nathan H Heller, Yeram Cheong, Jacob Smith
We report a novel phenomenon in which long sequences of random dot arrays refreshing at 2.5 Hz lead to persistent illusory percepts of coherent apparent motion. We term this effect illusory apparent motion (IAM). To quantify this illusion, we devised a persistence task in which observers are primed with a particular motion pattern and must indicate when the motion pattern ends. In Experiment 1 (N = 119), we induced translational apparent motion patterns and show that both drifting motion (e.g., up-up-up-up) and rebounding motion (e...
March 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28331844/a-single-institution-report-of-19-hepatocellular-carcinoma-patients-with-bile-duct-tumor-thrombus
#6
Anon Chotirosniramit, Akkaphod Liwattanakun, Worakitti Lapisatepun, Wasana Ko-Iam, Trichak Sandhu, Sunhawit Junrungsee
BACKGROUND: Obstructive jaundice caused due to bile duct tumor thrombus (BDTT) in a hepatocellular carcinoma (HCC) patient is an uncommon event. This study reports our clinical experiences and evaluates the outcomes of HCC patients with BDTT in a single institution. METHODS: A retrospective review of 19 HCC patients with secondary obstructive jaundice caused due to BDTT during a 15-year period was conducted. RESULTS: At the time of diagnosis, 14 (73...
2017: Journal of Hepatocellular Carcinoma
https://www.readbyqxmd.com/read/28329895/using-a-state-birth-registry-as-a-quality-improvement-tool
#7
Carole Lannon, Heather C Kaplan, Kelly Friar, Sandra Fuller, Susan Ford, Beth White, John Besl, John Paulson, Michael Marcotte, Michael Krew, Jennifer Bailit, Jay Iams
Background Birth registry data are universally collected, generating large administrative datasets. However, these data are typically not used for quality improvement (QI) initiatives in perinatal medicine because the quality and timeliness of the information is uncertain. Objective We sought to identify and address causes of inaccuracy in recording birth registry information so that birth registry data could support statewide obstetrical quality initiatives in Ohio. Study Design The Ohio Perinatal Quality Collaborative and the Ohio Department of Health Vital Statistics used QI techniques in 15 medium-sized maternity hospitals to identify and remove systemic sources of inaccuracy in birth registry data...
March 22, 2017: American Journal of Perinatology
https://www.readbyqxmd.com/read/28321221/leishmania-donovani-nucleoside-hydrolase-nh36-domains-induce-t-cell-cytokine-responses-in-human-visceral-leishmaniasis
#8
Micheli Luize Barbosa Santos, Dirlei Nico, Fabrícia Alvisi de Oliveira, Aline Silva Barreto, Iam Palatnik-de-Sousa, Eugenia Carrillo, Javier Moreno, Paula Mello de Luca, Alexandre Morrot, Daniela Santoro Rosa, Marcos Palatnik, Cristiane Bani-Corrêa, Roque Pacheco de Almeida, Clarisa Beatriz Palatnik-de-Sousa
Development of immunoprotection against visceral leishmaniasis (VL) focused on the identification of antigens capable of inducing a Th1 immune response. Alternatively, antigens targeting the CD8 and T-regulatory responses are also relevant in VL pathogenesis and worthy of being included in a preventive human vaccine. We assessed in active and cured patients and VL asymptomatic subjects the clinical signs and cytokine responses to the Leishmania donovani nucleoside hydrolase NH36 antigen and its N-(F1), central (F2) and C-terminal (F3) domains...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28320597/racial-or-ethnic-and-socioeconomic-inequalities-in-adherence-to-national-dietary-guidance-in-a-large-cohort-of-us-pregnant-women
#9
Lisa M Bodnar, Hyagriv N Simhan, Corette B Parker, Heather Meier, Brian M Mercer, William A Grobman, David M Haas, Deborah A Wing, Matthew K Hoffman, Samuel Parry, Robert M Silver, George R Saade, Ronald Wapner, Jay D Iams, Pathik D Wadhwa, Michal Elovitz, Alan M Peaceman, Sean Esplin, Shannon Barnes, Uma M Reddy
BACKGROUND: The significance of periconceptional nutrition for optimizing offspring and maternal health and reducing social inequalities warrants greater understanding of diet quality among US women. OBJECTIVE: Our objective was to evaluate racial or ethnic and education inequalities in periconceptional diet quality and sources of energy and micronutrients. DESIGN: Cross-sectional analysis of data from the Nulliparous Pregnancy Outcomes Study: Monitoring Mothers-to-Be cohort...
March 14, 2017: Journal of the Academy of Nutrition and Dietetics
https://www.readbyqxmd.com/read/28319646/improving-non-specific-binding-and-solubility-bicycloalkyls-and-cubanes-as-p-phenyl-bioisosteres
#10
Yves P Auberson, Cara Brocklehurst, Markus Furegati, Thomas Fessard, Guido Koch, Andrea Decker, Luigi La Vecchia, Emmanuelle Briard
Bicycloalkyl groups have previously been described as phenyl group bioisosteres. This article describes the synthesis of new building blocks allowing their introduction in complex molecules, and explores their use as a means to modify the physicochemical properties of drug candidates and improve the quality of imaging agents. In particular, the replacement of an aromatic ring with a bicyclo[1.1.1]pentane-1,3-diyl group improves solubility by at least 50-fold, and markedly decreases non-specific binding (NSB) as measured using CHI(IAM), the chromatographic hydrophobicity index on immobilized artificial membranes...
March 20, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28318880/highly-conformal-craniospinal-radiotherapy-techniques-can-underdose-the-cranial-clinical-target-volume-if-leptomeningeal-extension-through-skull-base-exit-foramina-is-not-contoured
#11
D J Noble, T Ajithkumar, J Lambert, I Gleeson, M V Williams, S J Jefferies
AIMS: Craniospinal irradiation (CSI) remains a crucial treatment for patients with medulloblastoma. There is uncertainty about how to manage meningeal surfaces and cerebrospinal fluid (CSF) that follows cranial nerves exiting skull base foramina. The purpose of this study was to assess plan quality and dose coverage of posterior cranial fossa foramina with both photon and proton therapy. MATERIALS AND METHODS: We analysed the radiotherapy plans of seven patients treated with CSI for medulloblastoma and primitive neuro-ectodermal tumours and three with ependymoma (total n = 10)...
March 15, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28303169/diallyl-trisulfide-suppresses-oxidative-stress-induced-activation-of-hepatic-stellate-cells-through-production-of-hydrogen-sulfide
#12
Feng Zhang, Huanhuan Jin, Li Wu, Jiangjuan Shao, Xiaojing Zhu, Anping Chen, Shizhong Zheng
Accumulating data reveal that garlic has beneficial effects against chronic liver disease. We previously reported that diallyl trisulfide (DATS), the primary organosulfur compound in garlic, reduced fibrosis and attenuated oxidative stress in rat fibrotic liver. The present study was aimed at elucidating the underlying mechanisms. The primary rat hepatic stellate cells (HSCs) were cultured and stimulated with hydrogen peroxide (H2O2) for inducing HSC activation under oxidative stress. We examined the effects of DATS on the profibrogenic properties and oxidative stress in H2O2-treated HSCs...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28292738/when-educational-material-is-delivered-a-mixed-methods-content-validation-study-of-the-information-assessment-method
#13
Hani Badran, Pierre Pluye, Roland Grad
BACKGROUND: The Information Assessment Method (IAM) allows clinicians to report the cognitive impact, clinical relevance, intention to use, and expected patient health benefits associated with clinical information received by email. More than 15,000 Canadian physicians and pharmacists use the IAM in continuing education programs. In addition, information providers can use IAM ratings and feedback comments from clinicians to improve their products. OBJECTIVE: Our general objective was to validate the IAM questionnaire for the delivery of educational material (ecological and logical content validity)...
March 14, 2017: JMIR Medical Education
https://www.readbyqxmd.com/read/28291893/predictive-accuracy-of-serial-transvaginal-cervical-lengths-and-quantitative-vaginal-fetal-fibronectin-levels-for-spontaneous-preterm-birth-among-nulliparous-women
#14
M Sean Esplin, Michal A Elovitz, Jay D Iams, Corette B Parker, Ronald J Wapner, William A Grobman, Hyagriv N Simhan, Deborah A Wing, David M Haas, Robert M Silver, Matthew K Hoffman, Alan M Peaceman, Steve N Caritis, Samuel Parry, Pathik Wadhwa, Tatiana Foroud, Brian M Mercer, Shannon M Hunter, George R Saade, Uma M Reddy
Importance: Spontaneous preterm birth is a leading cause of infant mortality. Prediction, largely based on prior pregnancy outcomes, is not possible in women pregnant for the first time. Objective: To assess the accuracy of universal screening to predict spontaneous preterm birth in nulliparous women using serial measurements of vaginal fetal fibronectin levels and cervical length. Design, Settings, and Participants: A prospective observational cohort study of nulliparous women with singleton pregnancies, from 8 clinical sites across the United States between October 2010 and May 2014...
March 14, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28271259/neoadjuvant-treatment-for-locally-invasive-esophageal-cancer
#15
Wade T Iams, Victoria M Villaflor
Locally advanced esophageal carcinoma has a poor prognosis, and epidemiologic trends show that more patients are being diagnosed with locally advanced esophageal carcinoma and with adenocarcinoma histology. This prompts a review and evaluation of the field regarding standard of care treatment for patients with locally advanced esophageal carcinoma, both adenocarcinoma and squamous cell carcinoma. We review the evidence showing the moderate benefit of neoadjuvant chemoradiation followed by esophagectomy compared to perioperative chemotherapy plus esophagectomy in patients who are good operative candidates...
March 7, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28262866/imaging-rotations-and-vibrations-in-polyatomic-molecules-with-x-ray-scattering
#16
Andrés Moreno Carrascosa, Thomas Northey, Adam Kirrander
An approach for calculating elastic X-ray scattering from polyatomic molecules in specific electronic, vibrational, and rotational states is presented, and is used to consider the characterization of specific states in polyatomic molecules using elastic X-ray scattering. Instead of the standard independent atom model (IAM) method, the X-ray scattering is calculated directly from ab initio wavefunctions. The role of molecular symmetry and Friedel's law is examined, with the molecules BF3, C5H5(-), NF3, and 1,3-cyclohexadiene used as specific examples...
March 6, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28249134/treatment-of-subclinical-hypothyroidism-or-hypothyroxinemia-in-pregnancy
#17
RANDOMIZED CONTROLLED TRIAL
Brian M Casey, Elizabeth A Thom, Alan M Peaceman, Michael W Varner, Yoram Sorokin, Deborah G Hirtz, Uma M Reddy, Ronald J Wapner, John M Thorp, George Saade, Alan T N Tita, Dwight J Rouse, Baha Sibai, Jay D Iams, Brian M Mercer, Jorge Tolosa, Steve N Caritis, J Peter VanDorsten
Background Subclinical thyroid disease during pregnancy may be associated with adverse outcomes, including a lower-than-normal IQ in offspring. It is unknown whether levothyroxine treatment of women who are identified as having subclinical hypothyroidism or hypothyroxinemia during pregnancy improves cognitive function in their children. Methods We screened women with a singleton pregnancy before 20 weeks of gestation for subclinical hypothyroidism, defined as a thyrotropin level of 4.00 mU or more per liter and a normal free thyroxine (T4) level (0...
March 2, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28241557/tunable-enhanced-spontaneous-emission-in-plasmonic-waveguide-cladded-with-liquid-crystal-and-low-index-metamaterial
#18
He Hao, Juanjuan Ren, Hongyi Chen, Iam Choon Khoo, Ying Gu, Qihuang Gong
The control and enhancement of the spontaneous emission (SE) of emitters embedded in subwavelength structures are fundamentally interesting and of practical interest. For example, in plasmonic lasers and on-chip single photon sources, a large SE rate and the active modulation of SE over a very broad spectral band are highly desired functionalities. In this paper, we demonstrate by an explicit theoretical calculation that a plasmonic waveguide cladded with liquid crystals (LCs) and low-index metamaterials can give rise to an enhancement in the intrinsic SE rate γ<sub>0</sub> of more than two orders of magnitude...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28240523/prognostic-factors-and-survival-of-patients-with-carcinoma-of-the-ampulla-of-vater-after-pancreaticoduodenectomy
#19
Sunhawit Junrungsee, Ekkapope Kittivarakul, Wasana Ko-iam, Worakitti Lapisatepun, Trichak Sandhu, Anon Chotirosniramit
Background: Although carcinoma of the ampulla of Vater (CAV) is a rare tumor, accounting for just 0.2% of gastrointestinal cancers, the survival of CAV patients is unfavorable. The five-year rates have ranged from 36.8-75.2% in previous reports but there is a lack of data relating to Thai people. Also prognostic factors are controversial. Objectives: This study aimed to determine survival outcomes and to identify prognostic factors for a positive outcome for CAV patients after surgery. Methods: In this retrospective cohort study, data were collected from CAV patients who underwent surgery in Chiang Mai University Hospital from 2005 to 2012 for time to event analysis, the log rank test and univariate and multivariate Cox’s regression analysis...
January 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28239497/predictive-factors-for-a-long-hospital-stay-in-patients-undergoing-laparoscopic-cholecystectomy
#20
Wasana Ko-Iam, Trichak Sandhu, Sahattaya Paiboonworachat, Paisal Pongchairerks, Anon Chotirosniramit, Narain Chotirosniramit, Kamtone Chandacham, Tidarat Jirapongcharoenlap, Sunhawit Junrungsee
Background. Although the advantages of laparoscopic cholecystectomy (LC) over open cholecystectomy are immediately obvious and appreciated, several patients need a postoperative hospital stay of more than 24 hours. Thus, the predictive factors for this longer stay need to be investigated. The aim of this study was to identify the causes of a long hospital stay after LC. Methods. This is a retrospective cohort study with 500 successful elective LC patients being included in the analysis. Short hospital stay was defined as being discharged within 24 hours after the operation, whereas long hospital stay was defined as the need for a stay of more than 24 hours after the operation...
2017: International Journal of Hepatology
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