oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Statistical Procedures for Finding Distribution Fits over Datasets with Applications in Biochemistry
Natalia D. Nikolova,Daniela S. Toneva,Ana-Maria K. Tenekedjieva
Bioautomation , 2009,
Abstract: A common problem in statistics is finding a distribution that fits to a certain dataset. Many theoretical distributions have been developed to give a good description of the empirical observations, and consequently, theory offers a variety of algorithms to test the quality of the resulting fits. It is reasonable to expect that each set of measurements should be described with the same theoretical distribution if one and the same experimental mechanism was applied. This paper presents procedures to find a theoretical distribution that best fits to several datasets. The procedure goes further, answering the questions of whether the given datasets come from the same general population, and assessing if the difference between the fitted distributions of two datasets are statistically significant. Kuiper test is used in all steps of the analysis. In two of those a Monte Carlo simulation procedure is elaborated to construct the Kuiper statistic's distribution. A platform with original program functions in MATLAB R2009a is created on the basis of the described procedures. It is applied to datasets from a biochemical experiment, which investigates the resulting density of fibrin network under different thrombin concentrations. The developed procedure has wide applications in different fields, as it models the behavior of datasets, generated through the same mechanism. The possibility to fit one type of distribution over different datasets allows comparing samples, performing interpolation and extrapolation procedures, and investigating the influence of the input conditions of an experiment over the parameters of the fitted distributions.
Effectiveness of Examination Handling and Distribution Procedures in Curbing Malpractices in Secondary Schools in Eastern Province, Kenya  [PDF]
Eunice Kagendo Njue, George M. Muthaa, Peter K. Muriungi
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.58068
Abstract:

Examinations provide discriminatory criteria for individuals and evaluate whether educational goals are being achieved. To guarantee equity, fair evaluation must be devoid of all malpractices. The KNEC has put in place policies aimed at reducing cases of examination malpractices; however there has been a rise in reported cases of examination malpractices with the release of every examination results. The current study sought to determine the effectiveness of the examination handling and distribution procedures in addressing the examination malpractices. A sample size of 511 subjects was involved in the study. The study was conducted using descriptive survey research design. Reliability of instruments was determined using cronbach coefficient alpha method. The study established that the management of the examinations is dominated by the male gender. Handling and distribution of examinations was blamed for examinations malpractices. The researcher recommends training for all personnel involved in the management of the examinations.

Application of Stored Procedures to Defense against SQL Injection Attacks in Online Examination System
存储过程技术在网络考试系统SQL注入攻击防御上的应用

HUANG Long-Jun,
黄龙军

计算机系统应用 , 2013,
Abstract: This paper describes the use of stored procedures to improve the security of online examination system. We discuss SQL injection attacks , the method of defense using the stored procedures , and some stored procedures of the online examination system,such as randomly generated papers. Use of stored procedures effectually secures against SQL injection attacks, improves the system security.
Grand challenges in cellular biochemistry: the “next-gen” biochemistry  [PDF]
Cecilia Giulivi
Frontiers in Chemistry , 2014, DOI: 10.3389/fchem.2014.00022
Abstract: It is said that Biochemistry is a young scientific discipline, making its “formal” debut towards the end of the 1900th century (Manchester, 2000), with seminal works by Buchner (Buchner, 1897;Jaenicke, 2007), Hill (Hill, 1898), Harden (Harden, 1911), and, of course, Michaelis and Menten (Johnson, 2013;Michaelis and Menten, 2013;Deichmann et al., 2014). Back in 1896, Buchner’s preparation of a “juice” from yeast (Buchner, 1897) is often regarded as the birth of modern biochemistry. However, I tend to digress with this strict view of biochemistry, reasoning that we (as a species) were taking advantage of biochemical principles without having a deep understanding of the molecular process. For instance, consider Buchner’s “juice” or actually wine making. This method, that has at its core the fermentation process one of the key pathways in biochemistry, dating back to around 6000 BC (Chambers and Pretorius, 2010). Refer to the complicated production of fish sauces considered among the most common flavor-enhancing condiments produced and distributed across ancient Roman Empire (Lowe, 2009). Another example comes from the mixture of organic preservatives (i.e., biochemical) used for ancient Egyptian mummification (Buckley and Evershed, 2001). This early biochemistry was empirical, done in settings other than laboratories, serving immediate needs, and probably passed onto next generations by oral traditions. Then, are these contributions valuable to the genesis of biochemistry? Should they be dismissed because the microorganisms were not genotyped, the reactions were done in dolia instead of microplates? Then, if we accept these very early facts (and why not experiments?) as part of the genesis of this field, we will need to accept that biochemistry is a long, long (ancient?) journey that have accompanied us since the dawn of civilization. The general field of Biochemistry has grown since then to the point that it has been expanded to various more specific areas of research. For example, Cellular Biochemistry is at the crossroads of Chemistry (Organic, Physical, Analytical, Inorganic, Biological) and Biology (Chemical, Molecular) including studies on biomolecular structures and the mechanism of biochemical reactions, but also on the biological purposes of biochemical phenomena, i.e., metabolic pathways and their control, physiological significance and clinical relevance of topics presented. The regulation includes protein and gene expression analyses as well as protein post-translational modifications, epigenetic controls, metabolite-control systems, and
Systemic approaches to teaching and learning a module of Biochemistry [SATL-BC]
S Golemi, R Ke ira, N Medja, D Lacej
African Journal of Chemical Education , 2013,
Abstract: In this article, we introduce the application of SATL in the subject of medical biochemistry. The strategy of this method is based on the collection, organization, and presentation of the map of concepts through the interactive system in the module of which the relations between the concepts and issues will be clarified. The main structural element of the SATL is the systemic diagram which bears all the attributes of a closed concept map. The systemic diagrams are created on the basis of the combination of the concepts that students already have and what they acquire through the study of the modules. The construction of systemic diagram helps students to understand the conceptual framework of the subject. Through the application of systemic methodology, students will study not only concepts, principles, and various metabolic procedures that occur in the organism they will also understand the vital role of biochemistry in medicine and how biochemistry principles are applied in everyday professional practices. [AJCE, 3(1), January 2013]
Towards quantitative biochemistry: research and reports in biochemistry  [cached]
Dokholyan,NV
Research and Reports in Biochemistry , 2011,
Abstract: Nikolay V DokholyanDepartment of Biochemistry and Biophysics, University of North Carolina, School of Medicine, Chapel Hill, NC, USASince the mid twentieth century the field of biochemistry has evolved significantly (Figure 1). Advances made in the fields of structural, chemical, and systems biology, physics, and computation have shaped the new field of biochemistry such that the emphasis became the cellular-wide view of molecular life at the atomic scale. The principal paradigm in the field shifted from focusing on a single or a few biological molecules to focusing on their cellular- and intracellular-wide networks. This shift has resulted in more interdisciplinary approaches to biochemical research, which nowadays combines techniques and strategies from a broad range of fields. The evolution of the field of biochemistry resulted in closer connections to other fields, such as medicinal chemistry, physiology, and medicine. Biochemistry is also one of the central components of the emerging translational medicine paradigm.
Procedures aid the oncology pharmacy in the preparation and supply of anticancer drugs
Graziella Sassi
European Journal of Oncology Pharmacy , 2011,
Abstract: Procedures represent a key support for the oncology pharmacy in order to prevent risks and accidents related to handling cytotoxic drugs as well as to provide safe chemotherapy to the patient. This article summarises the key topics that should be addressed when creating/revising these procedures.
Eyelid control during an eye examination
Sue Stevens
Community Eye Health Journal , 2009,
Abstract: Practical ophthalmic procedures: this article discusses how to prepare for and carry out eyelid control during eye examination. Eyelid control is important in order to provide a good view of the eyeball for the examiner and to avoid unnecessary discomfort for the patient.
Towards quantitative biochemistry: research and reports in biochemistry
Dokholyan, NV
Research and Reports in Biochemistry , 2011, DOI: http://dx.doi.org/10.2147/RRBC.S19537
Abstract: Towards quantitative biochemistry: research and reports in biochemistry Editorial (2313) Total Article Views Authors: Dokholyan, NV Published Date May 2011 Volume 2011:1 Pages 1 - 2 DOI: http://dx.doi.org/10.2147/RRBC.S19537 Nikolay V Dokholyan Department of Biochemistry and Biophysics, University of North Carolina, School of Medicine, Chapel Hill, NC, USA Since the mid twentieth century the field of biochemistry has evolved significantly (Figure 1). Advances made in the fields of structural, chemical, and systems biology, physics, and computation have shaped the new field of biochemistry such that the emphasis became the cellular-wide view of molecular life at the atomic scale. The principal paradigm in the field shifted from focusing on a single or a few biological molecules to focusing on their cellular- and intracellular-wide networks. This shift has resulted in more interdisciplinary approaches to biochemical research, which nowadays combines techniques and strategies from a broad range of fields. The evolution of the field of biochemistry resulted in closer connections to other fields, such as medicinal chemistry, physiology, and medicine. Biochemistry is also one of the central components of the emerging translational medicine paradigm. Post to: Cannotea Citeulike Del.icio.us Facebook LinkedIn Twitter Readers of this article also read: Local anesthetic failure associated with inflammation: verification of the acidosis mechanism and the hypothetic participation of inflammatory peroxynitrite Does wine prevent dementia? Imaging of peripheral vascular disease Health literacy and health seeking behavior among older men in a middle-income nation Neurotransmitter testing of the urine: a comprehensive analysis Intercellular cancer collisions generate an ejected crystal comet tail effect with fractal interface embryoid body reassembly transformation True story about HIV: theory of viral sequestration and reserve infection Modeling the alternative oxidase from the human pathogen Blastocystis using automated hybrid structural template assembly Alpha-linolenic acid protects against gentamicin induced toxicity A novel G-protein-coupled receptor-signaling platform and its targeted translation in human disease
Utilization of Electrochemical Sensors and Biosensors in Biochemistry and Molecular Biology  [PDF]
Vojtech Adam,Rene Kizek
Sensors , 2008, DOI: 10.3390/s8106125
Abstract: Editorial note concerning the "Utilization of Electrochemical Sensors and Biosensors in Biochemistry and Molecular Biology" special issue.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.