SUNY College of Environmental Science and Forestry
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1478 research outputs found
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Unlabeled class in Walters Hall
No full textAn unlabeled class being held in Walters Hall with the professor standing in the front of the classroom
5923 x 4762https://digitalcommons.esf.edu/paperimages/1091/thumbnail.jp
President Edward E. Palmer congratulates student Colvin M. Kasinja with Vice President for Program Affairs, Richard E. Pentoney looking on
No full textStudent Colvin M. Kasinja (left) accepting an award from President Edward E. Palmer (right) and Vice President for Program Affairs, Richard E. Pentoney (center) looking on
5901 x 4492https://digitalcommons.esf.edu/paperimages/1107/thumbnail.jp
Caption for Syracuse Pulp and Paper foundation officers: G Lamont Bidwell, Alfred G. Blake, F W. O\u27Neil, Walter B. Morehouse, Ralph G. Unger
No full textA caption for a photograph -- \u27Photo caption: Syracuse Pulp and Paper Foundation Officers, left to right, are: G. Lamont Bidwell, treasurer; Alfred G. Blake, vice president; F. W. O\u27Neil, executive secretary; Walter B. Morehouse, president; and Ralph G. Unger, assistant treasurer.\u27
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Analysis of Sterol Diagenesis Stages in a Peat Core from Kamchatka, Russia
Get PDFPeatlands are a critical part of the global carbon cycle. While many studies of peat carbon focus on accumulation, less is known about peat decay. We use the diagenesis of sterols to track the decomposition of peat in a Holocene-length core of a sedge fen on the Kamchatka Peninsula, Russia. Diagenesis can transform sterols as soon as the peat is initially deposited, but they can also remain unchanged for millennia. We have quantified the transformation of sterols into their diagenetic products to measure the maturity of peat and estimate carbon loss. Further, there are two pathways in sterol diagenesis, oxidative and reductive, and the products of these two pathways can indicate the conditions under which the peat degraded. This project focuses on the transformations of cholesterol, campasterol, and β- sitosterol, to cholestanol, campastanol, and stigmasta-3,5-diene-7-one, respectively. During the late Glacial period (before 10 ka) the oxidative pathway dominated sedimentary sterol transformation, indicating strongly reducing conditions. These sediments were deposited before the site transitioned to a peatland, and are dominated by sapropel, supporting the steroid evidence for reducing conditions. During the Early Holocene, (about 8 -6 ka) sterols, and, presumably, peat, were well preserved, and coincided with high carbon accumulation rates. In the middle Holocene (5 – 2 ka) the reductive diagenetic pathway dominated, indicating oxidizing conditions, and coincided with low rates of C accumulation. At 2.5 ka, conditions favoring the preservation of sterols returned, along with higher C accumulation.
The Farming Fissure: A Study Exploring Agricultural Diversification in Onondaga County, New York
Get PDFThe development towards specialized, consolidated agriculture has prompted concerns over the strength of local food systems, through posing economic, environmental and social risk and threatening long-term resilience. One touted strategy to both tackle gaps in the local food system and support local farmers involves diversifying agricultural operations. However, diversification strategies have lacked contextualization in literature, and have not been examined through the lens of farmer perceptions. This mixed-methods study synthesized a local food assessment in Onondaga County, New York with in-depth interviews with farmers regarding diversification. Results highlighted social and institutional factors that contribute to varied perceptions about diversification, and distinct business models uncovered aligned with areas of over and underproduction in the local food assessment. These different business models were found to serve multiscalar agricultural systems yet all occupy local “place”, suggesting that opportunities to build resilience necessitate consideration of institutional context, and collaborative convergence of place-based, local-global networks
Enzymatic Hydrolysis of Paulownia Pulp
Get PDFAs one of the most abundant polymers on earth, cellulose is an important industrial raw material and source of renewable energy. The enzymatic hydrolysis of cellulose to glucose by cellulase is one of the major methods to convert lignocellulosic biomass to biofuel and biomaterials. Enzymatic hydrolysis, catalyzed by cellulase, is a heterogeneous reaction, which is influenced by characteristics of cellulose (e.g. crystallinity, the degree of polymerization and accessible surface area) and other biomass components (lignin and hemicellulose). In this study paulownia pulp, after hot-water pretreatment and delignification was utilized as the substrate while a preparatory commercial cellulase composed of endoglucanase, exo-glucanase, and β-glucosidase was employed as the catalyst. The effect of temperature and pH were investigated. In the temperature experiment, the highest yield of sugar was reached at 55°C in 72 hours. For the pH, the highest conversion was achieved at 4.8 in 96 hours. Kinetic studies were performed with different enzyme loadings. Proton NMR was used for the quantification of glucose and cellobiose. The highest glucose yield in 166 hours was found to be 62.5% at 18.5FPU/g while cellobiose remained at a low and constant concentration during the process. A kinetic model was developed based on a proposed mechanism to explain the production of glucose. The hydrolysis rate was found to increase with increasing temperature at short reaction times, while decrease with increasing temperature at long reaction times. The kinetic model optimized with one set of data was further tested with a different set of enzymatic hydrolysis data
Pulp and Paper mill and labs
No full textThree students working in the Pulp and Paper mill and labs
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Students making chemical additions at wet end of the paper mill
No full textA white male student adding chemicals at the wet end of a paper mill machine
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Bengt Leopold with students at paper mill
No full textBengt Leopold instructing two students at the paper mill
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Speaking with Dick Mark and Aminur Eusafzai
No full textA group of five males, including Dick Mark (far right) and Aminur Eusafzai (foreground), talking to each other in a lab
5966 x 4394https://digitalcommons.esf.edu/paperimages/1068/thumbnail.jp