196,074 research outputs found
Food insecurity and risk management of smallholder farming systems in Ethiopia
No full textAgriculture is the economic mainstay of Ethiopia. About 80% of the Ethiopian population depends on smallholder agriculture whilst about 6 million of people are food insecure due to limited availability and access to food. Food insecurity has complex interfaces with environment, climate, economy, health, gender etc. Through the study of farming systems and livelihoods in two Ethiopian food insecure areas, a suited methodology is presented how to incorporate livelihoods into vulnerability and how to match economic and social dimensions with environmental and spatial analysis. The results show natural, market and health shocks constitute a major challenge to rural economy
Correction to: Outcomes on safety and efficacy of left atrial appendage occlusion in end stage renal disease patients undergoing dialysis (Journal of Nephrology, (2021), 34, 1, (63-73), 10.1007/s40620-020-00774-5)
No full textThe article Outcomes on safety and efficacy of left atrial appendage occlusion in end stage renal disease patients undergoing dialysis, written by Simonetta Genovesi, Luca Porcu, Giorgio Slaviero, Gavino Casu, Silvio Bertoli, Antonio Sagone, Monique Buskermolen, Federico Pieruzzi, Giovanni Rovaris, Alberto Montoli, Jacopo Oreglia, Emanuela Piccaluga, Giulio Molon, Mario Gaggiotti, Federica Ettori, Achille Gaspardone, Roberto Palumbo, Francesca Viazzi, Marco Breschi, Maurizio Gallieni, Gina Contaldo, Giuseppe D’Angelo, Pierluigi Merella, Fabio Galli, Paola Rebora, Mariagrazia Valsecchi, and Patrizio Mazzone, was originally published electronically on the publisher’s internet portal on 6 June 2020 without open access. With the author(s)’ decision to opt for Open Choice the copyright of the article changed on 10 July 2020 to © The Author(s) 2020 and this article is licensed under a Creative Commons Attribution 4.0 International License (http://creat iveco mmons .org/licen ses/ by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The original article has been updated
Organotin Halides as Catalytic Precursors in Dehydration Processes. Part 1. Acetalizations and Transacetalizations of Alicyclic Diols and Polyols
No full textOrganotin halides as catalytic precursor in dehydration processes. V. Acetalization and transacetalization of alicyclic diols and polyols
No full textDr. 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
The use of ligninase enzymes to target the scarification of the seed coat: application for the propagation of the orchids Himantoglossum adriaticum and Anacamptis morio.
No full textSeed dormancy may be associated with the presence of a rigid and impermeable integument that consists for the most part of lignin. Traditional methods for the scarification of the seed coat use corrosive chemicals, such as sulfuric acid or sodium hypochlorite, that can induce collateral effects on the embryo. In natural ecosystems wood/lignin is broken down by ligninase enzymes produced by fungi, and this is of particular relevance to the germination and symbiotic development of certain groups of plants such as orchids. Here we analyze the hypothesis that ligninases derived from fungi can be used to break the seed coat and stimulate germination, with particular reference to wild orchids of semi-natural grasslands. In an initial experiment the enzyme laccase was administered to seeds of Himantoglossum adriaticum and Anacamptis morio under sterile conditions in vitro, using two methods: 1). incorporation of the enzyme directly into the agar substrate using cool filtration, or 2). "bathing" the seeds after sowing with the addition of a sterile solution of the enzyme. In both cases a concentration of 1 unit of active enzyme per seed batch/Petri dish was used. In a second experiment germination of A. morio was compared on substrates containing one of three different ligninase enzymes (laccase, lignin peroxidase and manganese peroxidase) added to the substrate at a concentration of 0.04 U/Petri (the highest achievable concentration within cost constraints – while laccase is inexpensive, lignin peroxidase and manganese peroxidase cost around two hundred times the price of gold). In the first experiment, after six months the final rate of germination for both species was double that of the controls, only when laccase was added to the substrate (in the case of A. morio from 25 to 50 %, while for H. adriaticum from 2 to 5 %; statistically significant at the P ≤ 0.05 level). In contrast, the “bathing” treatment significantly reduced germination compared to the control and also introduced contamination. In the experiment to compare enzymes, no treatment means showed significant differences from the control. In conclusion, lignin peroxidase and manganese peroxidase are too costly to allow useful amounts of enzyme to be applied. However, as laccase is inexpensive larger amounts can be applied and were found to be effective. The germination rates obtained may appear low, but for species that produce thousands of seeds per fruit such as orchids a doubling in germination can result in a significant increase in terms of the number of plants produced. The use of ligninases, particularly laccase, in the propagation of rare species thus appears to be highly promising because the intervention is targeted at the seed coat without the risk of potential complications during the development of the embryo
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
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