68 research outputs found
Improving our understanding of demographic monitoring: avian breeding productivity in a tropical dry forest
No full textThe ratio of juvenile to adult birds in mist‐net samples is used to monitor avian productivity, but whether it is a “true” estimate of per capita productivity or an index proportional to productivity depends on whether capture probability is not age‐dependent (true estimate) or age difference in capture probability is consistent among years (index). Better understanding of the processes affecting age‐ and year‐specific capture probabilities is needed to advance the application of constant‐effort mist‐netting for monitoring and conservation, particularly in many tropical settings where capture rates are often low. We ranked members of the avian community by capture frequencies, determined if temporary emigration influenced the availability of birds to be captured, and assessed the distribution of birds relative to mist‐nets and the parity between capture‐based productivity estimates and number of fledglings in nest plots in a tropical dry forest in Puerto Rico in 2009 and 2010. Few captures characterized the community of 25 resident species and, when estimable, capture probabilities were low, particularly for juveniles (typically This article is published as Kornegay, M. Edye, Amber NM Wiewel, Jaime A. Collazo, James F. Saracco, and Stephen J. Dinsmore. "Improving our understanding of demographic monitoring: avian breeding productivity in a tropical dry forest." Journal of Field Ornithology 89, no. 3 (2018): 258-275. doi: 10.1111/jofo.12263.</p
ATR-FTIR measurement of biomass components in phosphonium ionic liquids
No full textQualitative and quantitative measurements of biomass components dissolved in the phosphonium ionic liquids (ILs), trihexyltetradecylphosphonium chloride ([P66614]Cl) and tributylmethylphosphonium methylsulphate ([P4441]MeSO 4), are obtained using attenuated total reflectance-FTIR. Absorption bands related to cellulose, hemicelluloses, and lignin dissolution monitored in situ in biomass-IL mixtures indicate lignin dissolution in both ILs and some holocellulose dissolution in the hydrophilic [P4441]MeSO 4. The kinetics of lignin dissolution reported here indicate that while dissolution in the hydrophobic IL [P66614]Cl appears to follow an accepted mechanism of acid catalyzed -aryl ether cleavage, dissolution in the hydrophilic IL [P4441]MeSO 4 does not appear to follow this mechanism and may not be followed by condensation reactions (initiated by reactive ketones). The measurement of lignin dissolution in phosphonium ILs based on absorbance at 1510 cm 1 has demonstrated utility. When coupled with the gravimetric Klason lignin method, ATR-FTIR study of reaction mixtures can lead to a better understanding of the delignification process. © 2012 Copyright Taylor and Francis Group, LLC
Reproductive physiology of Stylosanthes.
No full textConsiderably more is known about the reproductive physiology of Stylosanthes than of any other tropical legume genus. This review discusses the climatic control of flowering and seed formation in Stylosanthes. Species vary in the length of the juvenile phase when floral induction cannot proceed ranging from c. 45 to 70 days in seedlings of S. guianensis var. guianensis to much shorter durations in S. humilis and S. hamata. Short day, long-day, day-neutral and long-short-day photoperiod response types have been recognised in Stylosanthes. Variation in critical photoperiod and its interaction with temperature, the significance of marginally inductive conditions for seed production, and the effects of temperature, irradiance and water stress on the sequence of developmental processes are discussed
Demonstration of cellulosic ethanol production from sugarcane bagasse in Australia : the Mackay Renewable Biocommodities Pilot Plant
No full textThe ready availability of sugarcane bagasse at an existing industrial facility and the potential availability of extra fibre through trash collection make sugarcane fibre the best candidate for early stage commercialisation of cellulosic ethanol technologies. The commercialisation of cellulosic ethanol technologies in the sugar industry requires both development of novel technologies and the assessment of these technologies at a pre-commercial scale.\ud
In 2007, the Queensland University of Technology (QUT) received funding from the Australian and Queensland Governments to construct a pilot research and development facility for the production of bioethanol and other renewable biocommodities from biomass including sugarcane bagasse. This facility has been built on the site of the Racecourse Sugar Mill in Mackay, Queensland and is known as the Mackay Renewable Biocommodities Pilot Plant (MRBPP). This research facility is capable of processing cellulosic biomass by a variety of pretreatment technologies and includes equipment for enzymatic saccharification, fermentation and distillation to produce ethanol. Lignin and fermentation co-products can also be produced in the pilot facility.\u
To Belong or not to Belong: can we Research People's Attitudes to EU Citizenship?
No full textDigitised version produced by the EUI Library and made available online in 2020
Micro-algae cultivation for biofuels: Cost, energy balance, environmental impacts and future prospects
No full text02.09.13 KB. Ok to add the author version. Elsevier says ok while mandate not enforced
Extraction of lignin from lignocellulose at atmospheric pressure using alkylbenzenesulfonate ionic liquid
No full text- …
