Showing 11,381 - 11,400 results of 11,506 for search '"scientific literature"', query time: 0.35s Refine Results
  1. 11381
  2. 11382

    Review on the acute Daphnia magna toxicity test – Evaluation of the sensitivity and the precision of assays performed with organisms from laboratory cultures or hatched from dorman... by G. Persoone, R. Baudo, M. Cotman, C. Blaise, K.Cl. Thompson, M. Moreira-Santos, B. Vollat, A. Törökne, T. Han

    Published 2009-08-01
    “…However, the acceptance (or possible non-acceptance) of performing assays with test organisms obtained from “dormant eggs” should be clearly dictated by the “sensitivity” and “precision” criteria of the former assays in comparison to the latter.The first part of this review therefore thoroughly reviews the scientific literature and of data obtained from various laboratories for assays performed with either D. magna test organisms obtained from lab cultures or hatched from dormant eggs.Attention has focused on data of quality control tests performed on reference chemicals, and in particular on potassium dichromate (K2Cr2O7) for which an acceptability range of 0.6–2.1 mg·L–1 has been set in ISO standard 6341 for the 24 h EC50 of the acute D. magna assay.Mean EC50s, standard deviations and variation coefficients were calculated from the collected data, all of which are presented in tables and figures and discussed in detail.The major conclusions drawn from the analysis of the large number of quality control (QC) data on the acute D. magna toxicity test are that :(1) Virtually all results from assays performed with Daphnias taken from lab cultures or with Daphnia microbiotests are within the acceptability range set by ISO standard 6341 for the reference chemical potassium dichromate.(2) The mean 24 h EC50s of the Daphnia microbiotests performed in different laboratories are within the range of the mean EC50s of the assays based on lab cultures, and the variation coefficients (20 to 30%) are similar.(3) The precision – in terms of the long term in house variability – of the quality control Daphnia microbiotests is as good as that of the QC tests based on lab cultures.The review further reports on intra-laboratory sensitivity comparison studies performed during the last 15 years on pure chemicals and on natural samples, with both laboratory cultured organisms and Daphnias hatched from dormant eggs. …”
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  3. 11383

    Olfactory and taste disorders in COVID-19: a systematic review by Klinger V.T. da Costa, Aline Tenório Lins Carnaúba, Katianne Wanderley Rocha, Kelly Cristina Lyra de Andrade, Sonia M.S. Ferreira, Pedro de L. Menezes

    Published 2020-11-01
    “…Objective: To identify evidence in the scientific literature about olfactory/gustatory disorders, their clinical presentation, prevalence and possible specific treatments associated with COVID-19. …”
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  4. 11384

    Thermal stratification and meromixis in four dilute temperate zone lakes by E. D. Swanner, C. Harding, S. A. Akam, I. Lascu, G. Ledesma, G. Ledesma, P. Poudel, P. Poudel, H. Sun, H. Sun, S. Duncanson, S. Duncanson, K. Bandy, A. Branham, L. Bryant-Tapper, T. Conwell, O. Jamison, L. Netz

    Published 2024-03-01
    “…<p>Four adjacent lakes (Arco, Budd, Deming, and Josephine) within Itasca State Park in Minnesota, USA, are reported to be meromictic in the scientific literature. However, seasonally persistent chemoclines have never been documented. …”
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  5. 11385

    7.342 Developmental and Molecular Biology of Regeneration, Spring 2008 by Petersen, Christian

    Published 2023
    “…In this class we will take a comparative approach to explore this fascinating problem by critically examining classic and modern scientific literature about the developmental and molecular biology of regeneration. …”
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  6. 11386

    PREFACE by Oleh Pylypchuk, Oleh Strelko, Yulia Berdnychenko

    Published 2021-12-01
    “…However, in the scientific literature, the little attention is paid to the process of a development of a centralized institutional metrology system that is the organizational basis for ensuring the uniformity of measurements. …”
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  7. 11387

    PECULIARITIES OF THE COURSE AND TREATMENT OF GASTROESOPHAGEAL REFLUX DISEASE IN PATIENTS WITH SYNDROME OF UNDIFFERENTIATED CONNECTIVE TISSUE DYSPLASIA. (SYSTEMATIC LITERATURE REVIE... by Iryna Romash

    Published 2019-12-01
    “…And although scientists have increasingly investigated the relationship between gastroesophageal reflux disease (GERD) and UCTD syndrome in recent years, but the available scientific literature provides an extremely limited amount of material directly on the subject.  …”
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  8. 11388

    In vitro comparison of major memory-support dietary supplements for their effectiveness in reduction/inhibition of beta-amyloid protein fibrils and tau protein tangles: key primary... by Alan D. Snow, Joel A. Cummings, Rudolph E. Tanzi, Thomas Lake

    Published 2021-02-01
    “…Brain plaques, tangles and inflammation is the trilogy mainly responsible for causing memory loss that has now been documented for over 20 years in the scientific literature. The present investigation used in vitro quantitative methods to directly compare the ability of major memory-support dietary supplements to reduce pre-formed Aβ 1–42 fibrils (21 supplements tested) and tau protein paired helical/straight filaments (13 supplements tested)—two of the three most important targets for memory loss. …”
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  9. 11389

    An intercomparison study of analytical methods used for quantification of levoglucosan in ambient aerosol filter samples by K. E. Yttri, J. Schnelle-Kreis, W. Maenhaut, G. Abbaszade, C. Alves, A. Bjerke, N. Bonnier, R. Bossi, M. Claeys, C. Dye, M. Evtyugina, D. García-Gacio, R. Hillamo, A. Hoffer, M. Hyder, Y. Iinuma, J.-L. Jaffrezo, A. Kasper-Giebl, G. Kiss, P. L. López-Mahia, C. Pio, C. Piot, C. Ramirez-Santa-Cruz, J. Sciare, K. Teinilä, R. Vermeylen, A. Vicente, R. Zimmermann

    Published 2015-01-01
    “…<br><br> To our knowledge, this is the first major intercomparison on analytical methods used to quantify monosaccharide anhydrides in ambient aerosol filter samples conducted and reported in the scientific literature. The results show that for levoglucosan the accuracy is only slightly lower than that reported for analysis of SO<sub>4</sub><sup>2-</sup> (sulfate) on filter samples, a constituent that has been analysed by numerous laboratories for several decades, typically by ion chromatography and which is considered a fairly easy constituent to measure. …”
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  10. 11390

    https://ojs.mruni.eu/ojs/social-inquiry-into-well-being/article/view/7095 by Rasa Kulevičienė

    Published 2022-06-01
    “…Lithuanian and international sources (articles, monographs, textbooks of modern didactics, and books) were selected for the analysis of scientific literature. The principles of scientific ethics have been followed – the sources in the text are provided with clear references, and the translation of the texts written in foreign languages into Lithuanian has been validated. …”
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  11. 11391

    INDICATORS OF CELL CYCLE AND DNA FRAGMENTATION OF SPLEEN CELLS IN EARLY TERMS AFTER THERMAL BURNS OF SKIN ON THE BACKGROUND OF USING "LACTOPROTEIN WITH SORBITOL" OR HAES-LX-5 % by N. P. Ocheretna, Yu. I. Guminskiy, I. V. Gunas

    Published 2018-04-01
    “…In the scientific literature, there is no research data relative performance characteristics of the cell cycle and DNA fragmentation spleen cells after thermal skin burn on the background of the introduction of hyperosmolar infusion solutions. …”
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  12. 11392
  13. 11393

    7.342 To Divide or Not To Divide: Control of Cell Cycle and Growth by Extracellular Cues, Fall 2012 by Werven, Folkert van, Goranov, Alexi

    Published 2023
    “…In this course we will read and critically discuss the primary scientific literature with the goal of highlighting the basic principles of cell growth, adaptation, and differentiation. …”
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  14. 11394

    7.340 Avoiding Genomic Instability: DNA Replication, the Cell Cycle, and Cancer, Fall 2006 by Randell, John, Tanny, Robyn

    Published 2023
    “…We will examine both classical and current papers from the scientific literature to provide answers to these questions and to gain insights into how biologists have approached such problems. …”
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  15. 11395

    Jacques de Rette, l’incarnation d’un passeur culturel en éducation physique et sportive ? = Jacques de Rette, a cultural ferryman in physical education and sport? = Jacques de Rett... by Cyril Polycarpe, Sacha Thiebaud, Jean-Jacques Dupaux

    Published 2022-05-01
    “…These documents and articles, little studied in the scientific literature (Landry 1988), will be analysed under the prism of cultural history in order to understand the processes of diffusion and acculturation. …”
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  16. 11396

    PREFACE by Олег Пилипчук, Олег Стрелко, Юлия Бердниченко

    Published 2021-06-01
    “…In the article by Mykola Ruban and Vadym Ponomarenko on the basis of the complex analysis of sources and scientific literature the attempt to investigate historical circumstances of development and construction of shunting electric locomotives at the Dnipropetrovsk electric locomotive plant has been made. …”
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  17. 11397

    EFECTO DE DIFERENTES MÉTODOS DE ENTRENAMIENTO DE CONTRASTE PARA LA MEJORA DE LA FUERZA DE IMPULSIÓN EN UN SALTO VERTICAL by P. Padial, B. Feriche, I.J. Chirosa, B. Requena, L.J. Chirosa

    Published 2010-09-01
    “…The reason for the lack of group control is sufficiently verified by scientific literature demonstrating that strength training produces significant gains in the height of the jump. …”
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  18. 11398

    The Management of Strategic Change in the Municipal Public Library by Laima Liukinevičienė, Kamilė Kuodytė

    Published 2021-10-01
    “…The research aims to practically investigate the situation of strategic change management in Lithuanian municipal public libraries and to discern the aspects to be improved. Based on the scientific literature, we define strategic change as significant fundamental changes in the organization aimed at positive change: to eliminate shortcomings, negative consequences and take on new challenges inherent in the organization’s strategy. …”
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  19. 11399
  20. 11400

    ACTIVIDAD FÍSICA EN EMPLEADOS DE LA UNIVERSIDAD DE CALDAS, COLOMBIA ATIVIDADE FISICA EM EMPREGADOS DA UNIVERSIDADE DE CALDAS, COLÔMBIA PHYSICAL ACTIVITY IN PERSONNEL OF THE UNIVERS... by Eder Peña Quimbaya, Evelyn Colina Gallo, Ana Cecilia Vásquez Gómez

    Published 2009-12-01
    “…The institutional importance was identified regarding regulations, their diffusion and implementation of a healthy physical activity program for the personnel, in agreement with the recommendations from the scientific literature.…”
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