196,869 research outputs found
Catalogue des objets d'art et d'ameublement, clavecin..., céramiques, objets variés, cuivres, étains, bronzes d'art..., meubles anciens, tapisseries..., dont la vente après décès de M. Taskin,... / [expert] Mannheim
No full text[Vente. Art. 1897-11-26. Paris][Collection. Art. Taskin. 1897]Référence bibliographique : Lugt, 55724Appartient à l’ensemble documentaire : VenteEST2Avec mode text
Natural-based antibiofilm and antimicrobial peptides from microorganisms
No full textAs the resistance to antimicrobial molecules increases among bacteria, the need for new antimicrobial molecules increases. Antimicrobial peptides (AMP), which may be a new generation of antibiotic candidates, are important in this respect. AMPs are small, cationic and amphipathic peptide sequences. In eukaryotes, they are synthesized as a part of the immune system. Substantially, AMPs are discovered in all kingdoms of life such as bacteria, fungi and protozoa. Approximately 3,000 AMPs have been reported in the literature. However, most of these AMPs have been synthesized through chemical synthesis. Nature has a huge source of microorganisms, and in the literature, there is a tendency to increase every year the number of bacteria and fungus-derived AMPs thanks to their biotechnological importance. The exploration of AMP and antibiofilm peptide (ABP) producer microorganisms brings with it a lot of challenges experimentally. In this review study, we want to highlight the importance and challenge of these natural peptides derived from microorganisms. We will also propose a new explanation for ABPs
Biochar and hydrochar from waste biomass promote the growth and enzyme activity of soil-resident ligninolytic fungi
No full textBiochar (BC) and hydrochar (HC) are carbonaceous products obtained through, respectively, pyrolysis and hydrothermal carbonization processes of biomass. Both materials are multi-functional soil amendments. Ligninolytic fungi are primary decomposers of recalcitrant lignocellulosic material in nature through their extensive hyphal network and enzymes. In this work, two BC samples from red spruce pellets (BCSP) and grapevine pruning residues (BCGV) and two HC samples from urban pruning residues (HCUP) and the organic fraction of solid urban wastes (HCSU) were tested at concentrations of 0.4% and 2% (w/v) on the growth and enzyme activity of Trametes versicolor, Pleurotus ostreatus and Pleurotus eryngii. In all treatments with the lower concentration, BC and HC significantly stimulated fungal growth (up to about 90% increase for HCSU on T. versicolor), whereas at the higher dose some inhibition was observed on T. versicolor by BCSP and P. ostreatus by BCSP, BCGV and HCUP. The two materials, especially HC, at both doses noticeably increased the activity of laccase from T. versicolor and P. eryngii, up to 21 and 13 times, respectively, for HCUP compared to controls. The activity of manganese peroxidase from P. ostreatus was also greatly stimulated by BC and HC, especially when added at the higher concentration. The overall results obtained in this study suggest potential benefits for ligninolytic fungi from the presence of these materials in soil at adequate dose of application
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
The extracellular DNA can baffle the assessment of soil bacterial community, but the effect varies with microscale spatial distribution
No full textEnvironmental DNA is made-up of intracellular (iDNA) and extracellular (eDNA) pools. In soils, eDNA can be present up to 40% and could distort the assessment of living microorganisms. Distribution of microbial community is inconsistent among different size-aggregates, and the persistence and turnover of eDNA are thus uneven. Uneven persistence and distribution of eDNA could lead to heterogeneity in community analysis biases that arise due to eDNA sequences at micro-scale distribution. Here, we investigated the diversity and structure of eDNA and iDNA bacterial communities in bulk soil and different size-aggregates. Significant differences were observed between eDNA and iDNA bacterial diversity and composition. Changes in community composition are more important than the amount of eDNA to assess the biases caused by eDNA in community analysis. Furthermore, variations were also observed in aggregates-levels for eDNA and iDNA community which indicates that colonization pattern of iDNA community and protection of eDNA through absorbance on particle surface within soil-matrix is heterogeneous. Our work provides empirical evidence that eDNA presence could mask the detection of aggregates-level spatial dynamics in soil microbial community and have potential to qualitatively baffle observed live effects of given treatment by adequately muting the actual response dynamics of the soil microbiome
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Static and free vibration of axially loaded functionally graded beams based on the first-order shear deformation theory
No full textThe first-order shear deformation beam theory for static and free vibration of axially loaded rectangular functionally graded beams is developed. In this theory, the improved transverse shear stiffness is derived from the in-plane stress and equilibrium equation and thus, associated shear correction factor is then obtained analytically. Equations of motion are derived from the Hamilton’s principle. Analytical solutions are presented for simply-supported functionally graded beams. The obtained results are compared with the existing solutions to verify the validity of the developed theory. Effects of the power-law index, material contrast and Poisson’s ratio on the displacements, natural frequencies, buckling loads and load–frequency curves as well as corresponding mode shapes are investigated
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