286 research outputs found
Application of Superabsorbent Polymers for Improving the Ecological Chemistry of Degraded or Polluted Lands
No full textAbout 3.5 billion ha of land, which amounts to almost 30% of the total solid land of the world, has been degraded by human activities. The ecological restoration of these lands is a major challenge for mankind since they are the only option left for increasing the amount of arable land and producing food for the ever growing worldwide population. One common feature of these degraded lands is the fact that their organic soil matter is degraded also. Rainfall therefore, changes from a blessing to a menace since it is not kept in the soil and therefore causes erosion. A solution for the restoration of these lands could be the application of superabsorbent polymers (SAPs) to these soils. These substances are like 'artificial humus' as they are hydrophilic and contain carboxylic groups. This enables them to bind cations and water. They have the following advantages for the restoration of degraded lands. They increase the plant available water in the soil which enables the plants to survive longer under water stress. SAP amendment to soils reduces the evapotranspiration rate of the plants. They induce a significantly higher growth rate in plants growing on SAP amended soil. They bind heavy metals and mitigate their action on plants. They mitigate the effects of salinity. The benefits of SAP amendment to soils substantially outweigh their costs
International Aquaculture Curated Database
No full textThe International Aquaculture Curated Database (IACD), created by the AquaFish Innovation Lab, consists of 542 articles, written by 1706 authors in 121 journals, all of which were published between 1983 and 2016. The IACD draws from peer-reviewed papers whose research was supported by four separate international aquaculture programs, which were developed by Hillary Egna including: 1. Pond Dynamics/Aquaculture CRSP (1982-1996); 2. Aquaculture CRSP (1996-2008); 3. AquaFish CRSP (2006-2013); and 4. AquaFish Innovation Lab (2013-Present). The IACD was compiled by two AquaFIsh Innovation Lab faculty and a student who reviewed both electronic and hard copies of journal articles. Every publication since 1983 was recorded with relevant publication information, including full names, gender of authors, and author position, with the percentage of unknowns being less than 1%. Gender of authors was recorded by Egna from having a personal connection to the author or by the lead authors themselves. For privacy reasons, some of the publication details were removed
International Aquaculture Curated Database
No full textThe International Aquaculture Curated Database (IACD), created by the AquaFish Innovation Lab, consists of 542 articles, written by 1706 authors in 121 journals, all of which were published between 1983 and 2016. The IACD draws from peer-reviewed papers whose research was supported by four separate international aquaculture programs, which were developed by Hillary Egna including: 1. Pond Dynamics/Aquaculture CRSP (1982-1996); 2. Aquaculture CRSP (1996-2008); 3. AquaFish CRSP (2006-2013); and 4. AquaFish Innovation Lab (2013-Present). The IACD was compiled by two AquaFIsh Innovation Lab faculty and a student who reviewed both electronic and hard copies of journal articles. Every publication since 1983 was recorded with relevant publication information, including full names, gender of authors, and author position, with the percentage of unknowns being less than 1%. Gender of authors was recorded by Egna from having a personal connection to the author or by the lead authors themselves. For privacy reasons, some of the publication details were removed
Effects of Hydrogels on Tree Seedling Performance in Temperate Soils before and after Water Stress
No full textporated in the soil. The effect of cross-linked SAP hydrogel amendment on the performance of tree seedlings of Picea abies, Pinus sylivestris and Fagus sylvatica grown in temperate soils under water stress and non-water stress periods was investigated in a green house. The objective was to compare the root and shoot biomass of seedlings of the three species grown in sand, loam and clay soils amended with 0.4% w/w hydrogel in non water stress conditions as well as survival, root and shoot biomass after subjection to water stress. The seedlings were grown for 16 weeks, harvested and shoot as well as root biomass determined before water stress. The seedlings were also subjected to water stress and their biomass assessed at death following the water stress. The results showed that root and shoot biomass were generally higher in hydrogel amended soils compared to the controls. Root and shoot biomass of Fagus sylvatica was lower compared to Picea abies and Pinus sylivestris before water stress. The 0.4% hydrogel amendment significantly in- creased species’ survival in the different soils studied. Although root biomass was higher in hydrogel amended sandy soil compared to other soils, P. sylivestris and F. sylvatica shoot biomass were higher in hydrogel amended clay and loam soils compared to the sandy soil after water stress. Biomass was higher in sand compared to loam and clay soils under non-water and water stressed conditions. Since SAP hydrogel amendment improved the survival and biomass production of tree seedlings before and after water stress, use of SAPs could be promoted to enhance seedling produc- tion in water stress and non-water stress environment
Amending Soils with Hydrogels Increases the Biomass of Nine Tree Species under Non-water Stress Conditions
No full textThe classical aim of the application of super absorbent polyacrylate (SAPs) hydrogels is the prolonging of plant survival under water stress. Their effect on plant growth during non-water stress conditions is not known. This study examined the root and shoot biomass of seedlings of nine tree species: Eucalyptus grandis, Eucalyptus citriodora, Pinus caribaea, Araucaria cunninghamii, Melia volkensii, Grevillea robusta, Azadirachta indica, Maesopsis eminii and Terminalia superba. The seedlings were potted in five soil types; sand, sandy loam, loam, silt loam and clay. These were amended at two hydrogel levels: 0.2 and 0.4% w/w and grown under controlled conditions in a green house. Root and shoot growth responses of the seedlings were determined by measuring the dry weight of the roots, stems, leaves and twigs. The addition of either 0.2 or 0.4% hydrogel to the five soil types resulted in a significant increase of the root dry weight (p < 0.001) in eight tree species compared to the controls after 8 wk of routine watering. Also, the dry weight of stems and leaves and twigs were significantly (p < 0.001) higher in the nine tree species potted in hydrogel amended soil types than in the hydrogel free controls. These results suggested that hydrogel amendment enhances the efficiency of water uptake and utilization of photosynthates of plants grown in soils which have water contents close to field capacity
Effects of Hydrogel Amendment to Different Soils on Plant Available Water and Survival of Trees under Drought Conditions
No full textThe effect of super absorbent polyacrylate (SAP) hydrogel amendment to different soil types on plant available water (PAW) evapotranspiration and survival of Eucalyptus grandis, Eucalyptus citriodora, Pinus caribaea, Araucaria cunninghamii, Melia volkensii, Grevillea robusta, Azadirachta indica, Maesopsis eminii and Terminalia superba was investigated. The seedlings were potted in 3 kg size polythene bags filled with sand, loam, silt loam, sandy loam and clay soils, amended at 0 (control), 0.2 and 0.4% w/w hydrogel. The tree seedlings were allowed to grow normally with routine uniform watering in a glass house set up for a period of eight weeks, after which they were subjected to drought conditions by not watering any further. The 0.4% hydrogel amendment significantly (p < 0.05) increased the PAW by a factor of about three in sand, two fold in silt loam and one fold in sandy loam: loam and clay soils compared to the control. Similarly, the addition of either 0.2 or 0.4% hydrogel to the five soil types resulted in prolonged tree survival compared to the controls. Araucaria cunninghammi survived longest at 153 days, while Maesopsis eminii survived least (95 days) in sand amended at 0.4% after subjection to desiccation. Evapotranspiration was reduced in eight of the nine tree species grown in sandy loam, loam, silt loam and clay soils amended at 0.4% hydrogel. It is probable that soil amendment with SAP decreased the hydraulic soil conductivity that might reduce plant transpiration and soil evaporation
Duality of Function: Activation for Meaningless Nonwords and Semantic Codes in the Same Brain Areas
No full textStudies of the neural substrates of semantic (word meaning) processing have typically focused on semantic manipulations, with less consideration for potential differences in difficulty across conditions. While the idea that particular brain regions can support multiple functions is widely accepted, studies of specific cognitive domains rarely test for co-location with other functions. Here we start with standard univariate analyses comparing words to meaningless nonwords, replicating our recent finding that this contrast can activate task-positive regions for words, and default-mode regions in the putative semantic network for nonwords, pointing to difficulty effects. Critically, this was followed up with a multivariate analysis to test whether the same areas activated for meaningless nonwords contained semantic information sufficient to distinguish high- from low-imageability words. Indeed, this classification was performed reliably better than chance at 75% accuracy. This is compatible with two non-exclusive interpretations. Numerous areas in the default-mode network are task-negative in the sense of activating for less demanding conditions, and the same areas contain information supporting semantic cognition. Therefore, while areas of the default mode network have been hypothesized to support semantic cognition, we offer evidence that these areas can respond to both domain-general difficulty effects, and to specific aspects of semantics.I paid the open access fee, so this article should be "open access" from the journal.Peer reviewe
Maynard Jackson and Hillary Clinton, circa 1995
No full textMayor Jackson shakes hands with Hillary Clinton at the White House
50 Minute Zoom Critique On Ten Pages of Any Writing OR Career Advice from Hillary Homzie
No full textHollins Children’s Literature & Writing faculty member Hillary is the author of many books for children, including the Ellie May chapter books, a SLJ Webcast featured selection, and Queen of Likes, which was optioned by Priority Pictures and is a PJOur Way selection. Her latest project, the Kate the Chemist Middle Grade series, was recently featured on the Today Show. Using her experience as a sketch comedian in NYC, Hillary enjoys teaching students how to add levity and to find their own voice. The New York Times called her teaching “very attentive and appreciative and encouraging.” Hillary coordinates the internship programs for Arts & Humanities at Sonoma State University, where she is on the faculty. http://hillaryhomzie.com/. Bid on the chance to get excellent advice and feedback from a wonderful author and teacher!
Minimum Bid: $20https://digitalcommons.hollins.edu/fbc2020_auction/1022/thumbnail.jp
Ile kobiety w kobiecie — analiza wizerunku medialnego Hillary Rodham Clinton
No full textHow womanly can a woman be — analysis of Hillary Rodham Clinton’s media imageThe world of politics did not welcome women until quite recently. Yet, the situation has changed and there are more and more star women among American politicians. Hillary Rodham Clinton, the former First Lady and the 67th United States Secretary of State serving in the administration of President Barack Obama, definitely is one of them.The major role that Ann Romney played in the 2012 presidential campaign proves how important a factor of political success in the USA are politicians’ wives. They are the key “tool” used for improving their public image. Moreover, it is not too uncommon that a politician’s wife is one of the main contributors to her husband’s victory. But are female politicians also expected to do their own laundry and iron their own shirts, just like Mitt Romney did?The aim of the author of this article is to analyze the image of Hillary Rodham Clinton in American media and to try to answer the question, whether the 67th United States Secretary of State owes her unprecedented success to manifesting traditionally male traits or maybe she has become successful as a woman.How womanly can a woman be — analysis of Hillary Rodham Clinton’s media imageThe world of politics did not welcome women until quite recently. Yet, the situation has changed and there are more and more star women among American politicians. Hillary Rodham Clinton, the former First Lady and the 67th United States Secretary of State serving in the administration of President Barack Obama, definitely is one of them.The major role that Ann Romney played in the 2012 presidential campaign proves how important a factor of political success in the USA are politicians’ wives. They are the key “tool” used for improving their public image. Moreover, it is not too uncommon that a politician’s wife is one of the main contributors to her husband’s victory. But are female politicians also expected to do their own laundry and iron their own shirts, just like Mitt Romney did?The aim of the author of this article is to analyze the image of Hillary Rodham Clinton in American media and to try to answer the question, whether the 67th United States Secretary of State owes her unprecedented success to manifesting traditionally male traits or maybe she has become successful as a woman
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