99,790 research outputs found
Joshua Davis: Author of Spare Parts
No full textCitation: K-State First (2016). Joshua Davis: Author of Spare Parts [Flier]. Manhattan, Kansas: K-State First.Flyer advertising Joshua Davis's author talk at Kansas State University
Ecotox-evaluation strategy for soil bioremediation exemplified for a PAH-contaminated site
No full textHund K, Traunspurger W. Ecotox-evaluation strategy for soil bioremediation exemplified for a PAH-contaminated site. Chemosphere. 1994;29(2):371-390
Steven Johnson Author Talk Poster
No full textK-State Book NetworkA poster advertising an author talk by Steven Johnson at Kansas State University on September 3, 2014. Steven Johnson's book "The Ghost Map" was the 2014-2015 common book
Experimental study of convergent improvement and backcrossing in corn
No full textThis archival publication may not reflect current scientific knowledge or recommendations.Hayes, H. K.; Rinke, E. H.; Tsiang, Y. S.. (1946). Experimental study of convergent improvement and backcrossing in corn. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/204106
Einfluss verschiedener Konservierungsmaßnahmen für wässrige Proben auf die Ökotoxizität von Silbernanomaterialien in Kläranlagenausläufen
No full textÖkotoxikologische Testbatterien
No full textZur Beurteilung der Qualität von Böden und Bodensubstraten (belastete und gereinigte Böden) bedarf es einer "Testbatterie", die sich in Ergänzung zu chemisch-physikalischen Methoden insbesondere auch auf ökotoxikologische Tests stützt, um neben dem Schutz der menschlichen Gesundheit auch das Ziel des Schutzes der ökologischen Bodenfunktionen realisieren zu können. Basierend auf verschiedenen Vorarbeiten der letzten Jahre besteht weitgehend Konsens über die Zusammenstellung ökotoxikologischer Testbatterien sowie die Auswertung und Verallgemeinerung der Testergebnisse hinsichtlich eines Schutzes der Bodenfauna und -flora bzw. des Grundwassers. Was bisher fehlt, ist eine Validierung der vorgeschlagenen ökotoxikologischen Testsysteme zur Beurteilung von Böden bzw. Bodensubstraten in Ringtests. Ziel eines DBU-geförderten Ringtests war daher die Validierung solcher biologischer Testsysteme zur Bodenbeurteilung, für die eine eindeutige Testvorschrift erstellt werden konnte und mit denen bereits umfangreiche Erfahrungen vorlagen. Dabei wurden sowohl aquatische Tests als auch Genotoxizitätstests, Bodenmikrofloratests sowie Bodenfaunatests berücksichtig. Die Ergebnisse sind im vorliegenden Buch zusammengefasst
Channelling of basal resources and use of allochthonous marine carbon by soil arthropods of the Wadden Sea salt marsh
No full textSalt marshes are located between the marine and terrestrial systems. Because they form as sediment accumulates, they comprise a gradient of shore height with differing inundation frequencies and associated abiotic soil conditions. Along this gradient, both autochthonous vascular plant resources and allochthonous marine algal or detrital resources are available, with the availability of both varying with season and salt marsh zone. However, little is known about the importance of either resource for the soil-animal food web. We investigated both spatial and temporal resource use of soil macro- and mesofauna in a salt marsh using neutral lipid fatty acid (NLFA) analysis. Generally, irrespective of season and zone, the soil-animal food web relied on carbon originating from autochthonous vascular plants and associated bacteria and fungi, with the role of bacteria generally exceeding that of fungi. However, the channelling of fungal resources consistently peaked in October, whereas seasonal changes in the channelling of plant and bacterial resources varied among salt marsh zones. Further, variations in the channelling of resources with season and zone varied among salt marsh animal species. Allochthonous resources of marine origin provided only a minor contribution to soil food web nutrition across salt marsh zones and seasons. The contribution of algae to soil food web nutrition depended on inundation frequency and season, i.e. algal productivity. Overall, the results demonstrate that the salt marsh soil fauna predominantly relies on autochthonous vascular plant resources, with the contribution of allochthonous marine resources being minor and restricted to a few taxa
Adaptability in Wood Construction: Barriers to Flexible Multi-Storey Timber Buildings
No full textIn an era marked by rapid and constant change, designers are challenged to create solutions that are not only sustainable but also adaptable to an ever-evolving environment. Wood, as a renewable and versatile resource, plays a pivotal role in this context. Also, timber buildings and structures are in a perpetual state of transition, and enabling these transformations is crucial for the sustainable development of our built environment.
This chapter discusses adaptability for multi-storey timber buildings, addressing the current lack of empirical data and lived experience in this area. The research aims to identify the technical barriers to adaptation of multi-storey timber buildings and which research currently addresses them.
The methodology comprises an in-depth literature review on adaptability in timber engineering and architecture and a comparative analysis of adaptability research.
The study highlights the importance of designing timber buildings with adaptability in mind, considering aspects such as acoustics, prefabrication, standardisation, span, fire safety, services and moisture planning. The findings suggest that while timber structures are designed for longevity, their potential for adaptation is often insufficient, emphasizing the need for a more holistic approach to design that includes whole-building scales, while adaptability research does not yet incorporate these timber-specific aspects
Practice-based clinical evaluation of metalceramic and zirconia molar crowns: 3-year results
No full textThis practice-based study evaluates the clinical performance of conventionally luted metalceramic and zirconia molar crowns fabricated with pronounced anatomical core design and a prolonged cooling period of the veneering porcelain. Fifty-three patients were treated from 07/2008 until 07/2009 with either metalceramic crowns (MCC) (high-noble alloy+low-fusing porcelain) or zirconia crowns (Cercon System, DeguDent, Germany). Forty-nine patients (30 women/19 men) with 100 restorations (metalceramic: 48/zirconia: 52, mean observational period: 36 center dot 5 +/- 6months) participated in a clinical follow-up examination and were included in the study. Time-dependent survival (in situ criteria), success (event-free restorations) and chipping rates (defects of the veneering ceramics) were calculated according to the KaplanMeier method and analysed in relation to the crown fabrication technique, using a Cox regression model (P<0 center dot 05). Three complete failures (metalceramic: 1, zirconia: 2) were recorded (survival rate after 3years: metalceramic: 97 center dot 6%, zirconia: 95 center dot 2%). Of the metalceramic restorations, 90 center dot 9% remained event-free (two ceramic fractures, one endodontic treatment), whereas the success rate for the zirconia was 86 center dot 8% (two ceramic fractures, one endodontic treatment, one secondary caries). No significant differences in survival (P=0 center dot 53), success (P=0 center dot 49) and ceramic fracture rates (P=0 center dot 57) were detected. The combination of a pronounced anatomical core design and a modified firing of the veneering porcelain for the fabrication of zirconia molar crowns resulted in a 3-year survival, success and chipping rate comparable to MCC.DeguDent GmbH; Dentsply DeTre
Environmental hazard testing of nanobiomaterials
No full text13 Pág.The European Medicines Agency (EMA) regards the potential risks of human medicinal products to the environment and their impacts are assessed, as well as management to limit this impact. Hazard assessment of novel materials, which differ from conventional chemicals, e.g. nanobiomaterials, poses testing challenges and represents a work-in-progress with much focus on the optimization of required methodologies. For this work-in-progress, we here highlight where changes/updates are required in relation to the main elements for international testing based on OECD guidelines, supported by knowledge from the nanotoxicity area. The outline describes two major sections, nanobiomaterials and environmental hazards, including its challenges and learned lessons, with recommendations for implementation in OECD guidelines. Finally, the way forward via a testing strategy is described.[Figure not available: see fulltext.].This study was supported by the European Commission Project H2020-NMBP-2017 BIORIMA: BIOmaterial Risk MAnagement (GA No. 760928). Further support within H2020-NMBP-TO-IND-2018 NANORIGO: Establishing a NANOtechnology RIsk Governance Framework (GA No. 814530) and CESAM [UIDB/50017/2020 + UIDP/50017/2020], to FCT/MEC through national funds, and the co-funding by the FEDER, within the PT2020 Partnership Agreement and Compete 2020.Peer reviewe
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