196,057 research outputs found
Wild Lactuca Species in North America
No full textThis chapter presents a brief history of the uses of lettuce (Lactuca sativa L.) and its wild North American relatives, and reviews the agricultural importance of lettuce and challenges in its cultivation, in relation to nutritional quality, diseases, pests, and edaphic and climatic limitations. The evolution and taxonomy of the genus Lactuca are presented, with a primary focus on the wild Lactuca species of North America, their characterization, biogeography and distribution, habitat ecology, and genepools. Specific examples of phenotypic variability, genetic diversity and disease resistance of wild Lactuca taxa from both published reports and recent evaluations conducted in our laboratory are also presented. The past (and future) exploitation of wild Lactuca relatives in lettuce breeding is examined and discussed in the broader context of crop improvement. The current status of in situ and ex situ conservation of wild and weedy North American Lactuca is reviewed, along with recommendations on how these genetic resources could be better conserved and utilized.This is a manuscript of a chapter published as Lebeda A., Křístková E., Doležalová I., Kitner M., Widrlechner M.P. (2019) Wild Lactuca Species in North America. In: Greene S., Williams K., Khoury C., Kantar M., Marek L. (eds) North American Crop Wild Relatives, Volume 2. Springer, Cham. doi: 10.1007/978-3-319-97121-6_5. Posted with permission.</p
Pinguicula vulgaris in central Europe: when does one species turn into another?
No full textPinguicula vulgaris is one of the most common carnivorous plants in the Northern Hemisphere. It is a member of the species complex (P. vulgaris agg.) of which in Europe six taxa are recognized at different taxonomic ranks. One of them is P. bohemica, a taxon considered endemic to the Czech Republic, for which there are varied reports on its chromosome number (ploidy level) and contrasting opinions on its taxonomic rank. Based on the persistent instability of the taxonomy of this group in central Europe, we investigated the ploidy level, genome size, seed structure and genetic differentiation of taxa of P. vulgaris agg. in order to resolve the questions connected with P. bohemica. We sampled all taxa currently recognized as members of P. vulgaris agg. in Europe. Karyological analysis supported the octoploid level for P. bohemica and all other taxa, and flow cytometry further supported cytotype uniformity. Although generally conservative, the absolute genome size differentiates the morphologically similar taxa in P. vulgaris agg. Molecular markers suggested the presence of distinct groups within the central European populations of P. vulgaris agg., where the groups correspond to already recognized or even unrecognized taxa at the infraspecific level. We identified another lineage from southern Poland within the P. vulgaris group (with provisional name P. “polonica”). Most probably it is a direct descendant of the P. bohemica lineage, which diversified under isolation. The taxa P. bohemica and P. “polonica” are genetically well differentiated from P. vulgaris s.s. and P. vulgaris var. bicolor. The molecular-genetic differentiation of P. bohemica is comparable to narrowly endemic taxa from central Italy. Spatial isolation seems to be an important force causing the gradual divergence of isolated lineages within the P. vulgaris agg. Considering all the distinctive features, we suggest a subspecific category for P. bohemica, thus P. vulgaris subsp. bohemica
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
Virtuoso : Hrvatski skladatelji (studenti Muzičke akademije Sveučilišta u Zagrebu, 27. 5. 2021.)
No full textKoncert iz ciklusa Virtuoso održan na Muzičkoj akademiji u Koncertnoj dvorani "Blagoje Bersa" 27. 5. 2021. Izvođači: Mihael Hrgar (tuba), Martina Barišić (sopran), Petar Krokar (klavir), Božidar Vlašić (klavir), Matej Fridl (rog), Marko Gugić (rog), Lovre Laskač (rog), Bruno Laktaš (rog), Stefani Pijetlović (sopran), Brigita Kitner (klavir), Ansambl flauta Muzičke akademije Sveučilišta u Zagrebu (Iva Primorac (flauta piccolo), Ana Tutić (flauta), Nikolina Hapač (flauta), Marija Sušić (flauta), Maja Mustapić (flauta), Lucija Družinec (alt flauta), Ana Kovačev (alt flauta), Sara Lončar (alt flauta), Erin Keleuva (bas flauta), Doris Vincek (bas flauta)). Program: 1. M. Brekalo: Game of Kobalos (izvođač: Mihael Hrgar); 2. M. Cipra: Dvije djevojačke pjesme (I. Udaralo u tamburu đače - II. Oj volaru medena ti usta) (izvođači: Martina Barišić, Petar Krokar); 3. B. Papandopulo: Kaleidoskop 74, suita za glasovir (I. - V. - VI. Vivo) (izvođač: Božidar Vlašić); 4. T. Uhlik: Sjećanje na prijatelja, studija za četiri roga (izvođači: Matej Fridl, Marko Gugić, Lovre Laskač, Bruno Laktaš); 5. J. Hatze: „Arija rastanka“, arija Mare iz opere „Adel i Mara“ (izvođači: Stefani Pijetlović, Brigita Kitner); 6. I. Tijardović: „Daleko me biser mora“, arija Suzette iz operete „Mala Floramye“ (izvođači: Stefani Pijetlović, Brigita Kitner); 7. T. Uhlik: Karusel (izvođači: Ansambl flauta Muzičke akademije Sveučilišta u Zagrebu)
"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
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
Genetic structure and phylogeny of Italian and Czech populations of the cucurbit powdery mildew fungus Golovinomyces orontii inferred by multilocus sequence typing
No full textCucurbit powdery mildew caused by Golovinomyces orontii is a serious disease that affects cucurbit crops in temperate
areas. In northern Italy, the species is responsible for the early infections at the beginning of the growing season. However,
chasmothecia have never been recorded in Italy and the impact of either asexual or sexual reproduction of
G. orontii remains to be determined. To investigate and compare the genetic structure of Italian populations with those
from the Czech Republic, where chasmothecia are sporadically recorded, seven housekeeping gene fragments (tef-1a,
csI, ITS, H3, tub2, IGS and mtLSU) were amplified and used in a multilocus sequence typing (MLST) approach. The
four-gamete test was performed to detect recombination between and within populations. Phylogeny was inferred using
both Bayesian and minimum evolution analyses. Results from MLST revealed the presence of 141 single nucleotide
polymorphisms and the existence of 13 different haplotypes. Phylogenetic analysis revealed the existence of two main
distinct phylogenetic groups that were also highly genetically different, confirming that G. orontii is a species complex.
Recombination was detected within both the phylogenetic groups and the geographical populations, indicating that
sexual reproduction could have occurred. However, considering the lower haplotype diversity and the high frequency
of ST3 (17 isolates) and ST7 (eight isolates) haplotypes, the Italian population could be predominantly clonal, while
sexual reproduction may occasionally occur due to the introduction of genotypes similar to those from the Czech
Republic
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
Intern experience at CH���M Hill, Inc.: an internship report
No full textIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical referencesA review of the author's internship experience with CH���M HILL, Inc.
during the period September 1975 through May 1976 is presented. During this nine month
internship the author worked as an Engineer II in the Industrial Processes discipline of this
large consulting engineering firm... The author's prime responsibility was as one of three
lead design engineers on the design of a large wastewater treatment facility for a pulp mill
in Hoquiam, Washington owned by ITT Rayonier Inc. The work generally consisted of the design
of individual treatment units and associated piping and pumping. The purpose of the project
was to provide wastewater treatment capabilities that would satisfy the effluent limitations
(standards) imposed upon the mill by the State of Washington Department of Ecology and the
U.S. Environmental Protection Agency. The author's assignment also entailed necessary
interaction with the project manager and other CH���M HILL design engineers and support staff
members, the client's representatives, and representatives of two other consulting engineering
firms working on the project. Thus, the internship position at CH���M HILL provided considerable
experience coordinating the author's work with the work of other engineers, guiding the design
and administrative efforts of a support staff, and interacting regularly with the client and
other consulting firms. This broad exposure to a variety of engineering and organizational
problems provided a valuable educational experience
- …
