196,155 research outputs found
Stomatal density in Quercus petraea and Q. robur natural populations in Northern Turkey
No full textThis study examined variation of stomatal density in two populations of Quercus petraea (Matt.) Liebl. and two populations of Q. robur L. from northwestern Turkey. Stomatal density was determined in fully expanded and dried leaf samples that were collected from trees under natural conditions. Stomatal densities of Q. petraea and Q. robur varied from 186 to 459 per mm2 (mean value: 333 stomata per mm2) and from 397 to 826 per mm2 (mean value: 517 stomata per mm2), respectively. Significant differences in stomatal density were found between these two oak species in Turkey as well as between populations within species. Strong and significant negative correlations were observed between stomatal density and leaf length within each species and across the species. While in Central Europe Q. petraea occurs in drier environments than Q. robur, in the present study Q. robur populations grow in more arid environments and have smaller leaves and a higher stomatal density than Q. petraea. Stomatal density had negative correla¬tions with each of the other leaf characters apart from sinus width. In addition, the interspecific PST value (0.48) for stomatal density was relatively high compared to the mean genetic differentiation calculated at eight microsatellite loci (FST = 0.030), suggesting different local adaptations of populations. Further studies that include additional populations will be necessary to associate genetic variation at candidate genes with phenotypic and environmental variation
Guía del protocolo para Glomerulus Chip de S Musah, et al. (2018)
No full text(EN) The Figures were developed with Biorender.com and its aim is to provide a detailed visual guide to a protocol described in S. Musah, N. Dimitrakakis, DM Camacho, GM Church, and DE Ingber, “Directed differentiation of human induced pluripotent stem cells into mature kidney podocytes and establishment of a Glomerulus Chip, ”Nat. Protoc., vol. 13, no. 7, pp. 1662–1685, 2018, doi: 10.1038 / s41596-018-0007-8. These visual guide to experiments with mature kidney podocytes to establish a glomerulus chip are interesting for students or researchers who are entering this area of research.
(SP) Las Figuras fueron desarrolladas con Biorender.com y su objetivo es proporcionar una guía visual detallada de un protocolo descrito en S. Musah, N. Dimitrakakis, D. M. Camacho, G. M. Church, and D. E. Ingber, “Directed differentiation of human induced pluripotent stem cells into mature kidney podocytes and establishment of a Glomerulus Chip,” Nat. Protoc., vol. 13, no. 7, pp. 1662–1685, 2018, doi: 10.1038/s41596-018-0007-8. Esta guía visual de experimentos con podocitos de riñón maduros para establecer un chip de glomérulo son interesantes para estudiantes o investigadores que incursionan en esta área de investigación
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
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
Heavy Metal Concentrations in Various Species of Onion Bulbs in (Allium Spp.) Lapai Market, Niger State, Nigeria
No full textHauwa, I. Muhammad, M. Musah, and S. Abdulfatai
In order to evaluate the levels of heavy metal concentration in various species of onions, this study was implemented using three varieties of onion bulbs (Bermuda onion, Spring onion, Vidalia onion), gotten from some local markets within Niger State, They were analysed for their content of Cd, Cr, Pb, Cu, Zn and Fe using dry ashing and wet digestion methods. Variation in trend of mean concentrations of heavy metals obtained in the order: Fe (312.57ppm) > Zn (18.50 mg/kg) > Cu (13.50 mg/kg) > Cr (12.88 mg/kg) > Cd (4.85 mg/kg) and Fe (312.12 mg/kg) > Zn (17.98 mg/kg) > Cu (13.10 mg/kg)> Cr (12.15 mg/k ) > Cd (4.71 mg/kg) for results obtained after dry and wet ashing digestion methods respectively. There was no significant difference between the concentrations of heavy metals obtained both digestions method and between the concentrations of metals among the three species of onions. However, concentrations of Cd and Cr were above the FAO/WHO recommended limits for metals concentrations in vegetables
Proximate, Minerals and Functional Properties of Bombax buonopozense Cclyx
No full textMonday Musah, H. I. Muhammad, J. T. Mathew, Y. Azeh, M. T. Umar, S. N. Goshie
The nutritional constituents of Bombax buonopozense calyx were determined using standard methods. Results obtained from the proximate analysis indicated the presence of moisture (4.70±0.51 %), ash (5.50±0.47 %), crude protein (7.20±0.29 %), crude lipid (3.10±0.14 %), crude fibre (18.00±0.18 %), carbohydrate (66.20±0.27 %), and caloric value (279.85±0.31 kcal/100g). Mean concentrations of sodium, potassium, magnesium, calcium, and phosphorus were 25.00±0.09, 160.00±0.13, 48.10±0.47, 28.13±0.33 and 163.00±0.21 mg/100g respectively while measured values for functional properties were bulk density (0.52±0.01 g/cm3), water absorption capacity (2.35±0.35 %), oil absorption capacity (2.20±0.19 %), foaming capacity (13.72±0.27 %) and foaming stability (5.88±0.41 %). The results obtained compared favourably with most food materials and indicated that Bombax buonopozense calyx may be a good source of nutrients
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
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