Read by QxMD icon Read


A G Quentin, T Rodemann, M-F Doutreleau, M Moreau, N W Davies
Near-infrared reflectance spectroscopy (NIRS) is frequently used for the assessment of key nutrients of forage or crops but remains underused in ecological and physiological studies, especially to quantify non-structural carbohydrates. The aim of this study was to develop calibration models to assess the content in soluble sugars (fructose, glucose, sucrose) and starch in foliar material of Eucalyptus globulus A partial least squares (PLS) regression was used on the sample spectral data and was compared to the contents measured using standard wet chemistry methods...
September 26, 2016: Tree Physiology
Ernesto Deus, Joaquim S Silva, Filipe X Catry, Miguel Rocha, Francisco Moreira
Car surveys (CS) are a common method for assessing the distribution of alien invasive plants. Google Street View (GSV), a free-access web technology where users may experience a virtual travel along roads, has been suggested as a cost-effective alternative to car surveys. We tested if we could replicate the results from a countrywide survey conducted by car in Portugal using GSV as a remote sensing tool, aiming at assessing the distribution of Eucalyptus globulus Labill. wildlings on roadsides adjacent to eucalypt stands...
October 2015: Environmental Monitoring and Assessment
Antonio José Barotto, María Elena Fernandez, Javier Gyenge, Ariel Meyra, Alejandro Martinez-Meier, Silvia Monteoliva
The relationship between hydraulic specific conductivity (ks) and vulnerability to cavitation (VC) with size and number of vessels has been studied in many angiosperms. However, few of the studies link other cell types (vasicentric tracheids (VT), fibre-tracheids, parenchyma) with these hydraulic functions. Eucalyptus is one of the most important genera in forestry worldwide. It exhibits a complex wood anatomy, with solitary vessels surrounded by VT and parenchyma, which could serve as a good model to investigate the functional role of the different cell types in xylem functioning...
September 10, 2016: Tree Physiology
Chisato Kitazawa, Tsubasa Fujii, Yuji Egusa, Miéko Komatsu, Akira Yamanaka
Embryos of temnopleurid sea urchins exhibit species-specific morphologies. While Temnopleurus toreumaticus has a wrinkled blastula and then invaginates continuously at gastrulation, others have a smooth blastula and their invagination is stepwise. We studied blastula and gastrula formation in four temnopleurids using light and scanning electron microscopy to clarify the mechanisms producing these differences. Unlike T. toreumaticus, blastomeres of mid-blastulae in T. reevesii, T. hardwickii and Mespilia globulus formed pseudopods...
September 2, 2016: Biology Open
Susana Peleteiro, Valentín Santos, Juan C Parajó
Ionic liquids are valuable tools for biorefineries. This study provides an experimental assessment on the utilization of an acidic ionic liquid (1-butyl-3-methylimidazolium hydrogen sulfate) as a catalyst for furfural production in water/solvent media. The substrates employed in experiments were commercial xylose (employed as a reference compound) or hemicellulosic saccharides obtained by hydrothermal processing of Eucalyptus globulus wood (which were employed as produced, after membrane concentration or after freeze-drying)...
November 20, 2016: Carbohydrate Polymers
Jean-Marc Gion, Corey J Hudson, Isabelle Lesur, René E Vaillancourt, Brad M Potts, Jules S Freeman
BACKGROUND: Meiotic recombination is a fundamental evolutionary process. It not only generates diversity, but influences the efficacy of natural selection and genome evolution. There can be significant heterogeneity in recombination rates within and between species, however this variation is not well understood outside of a few model taxa, particularly in forest trees. Eucalypts are forest trees of global economic importance, and dominate many Australian ecosystems. We studied recombination rate in Eucalyptus globulus using genetic linkage maps constructed in 10 unrelated individuals, and markers anchored to the Eucalyptus reference genome...
2016: BMC Genomics
Anton C de Groot, Erich Schmidt
Data on the chemistry of essential oils which have caused contact allergy are provided. The largest group of chemicals found in essential oils consists of terpenes. The number of identified components usually ranges from 100 to 250, but in some oils (lavender, geranium, rosemary) 450 to 500 chemicals have been found. Many chemicals are present in a large number of oils, up to 98% for β-caryophyllene and 97% for limonene. Chemicals that are important constituents of >20 oils are limonene, linalool, and α-pinene...
July 2016: Dermatitis
Matthew J Larcombe, João Costa E Silva, Paul Tilyard, Peter Gore, Brad M Potts
BACKGROUND AND AIMS: Many previous studies conclude that pre-zygotic barriers such as mechanical isolation account for most reproductive isolation between pairs of taxa. However, the inheritance and persistence of barriers such as these after the first generation of hybridization is rarely quantified, even though it is a vital consideration in understanding gene flow potential. There is an asymmetrical pre-zygotic mechanical barrier to hybridization between Eucalyptus nitens and Eucalyptus globulus, which completely prevents small-flowered E...
September 2016: Annals of Botany
Roman Borovec, Hélène Perrin
Chiloneus globulus sp. nov. and C. tenietensis sp. nov. from Algeria are described, illustrated and compared with closely related species. The following new combinations are proposed: Chiloneus barbaricus (González, 1970) from Desbrochersella, Chiloneus innotatus (Pic, 1927) from Sciaphilus, Desbrochersella diversepubens (Pic, 1904) and Desbrochersella microps (Desbrochers des Loges, 1897) from Chiloneus, Myochlamys convexiceps (Desbrochers des Loges, 1896), Polydrusus (Leucodrusus) henoni (Allard, 1869) and Sericopholus murinus (Desbrochers des Loges, 1896) from Chiloneus...
2016: Zootaxa
Joon-Woo Park, Mitchell Wendt, Gang-Joon Heo
The antibacterial activities of the essential oil of Eucalyptus globulus (EOEG) was determined against 7 fish pathogenic bacteria (Edwardsiella tarda, Streptococcus iniae, S. parauberis, Lactococcus garviae, Vibrio harveyi, V. ichthyoenteri and Photobacterium damselae) obtained from farmed olive flounder. The inhibitory activity was evaluated by three methods: Disc diffusion method, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). According to the disc diffusion test, as the concentration of EOEG (5-40 µg) rises, the inhibitory zone increases in size...
June 2016: Laboratory Animal Research
Miroslava Císarová, Dana Tančinová, Juraj Medo, Miroslava Kačániová
The aim of the present study was to assess the antifungal and anti-toxinogenic activity of 15 essential oils (EOs) against three fungi of the genus Aspergillus (A. parasiticus KMi-227-LR, A. parasiticus KMi-220-LR and A. flavus KMi-202-LR). The minimum inhibitory doses (MIDs) of the tested essential oils and their antifungal activity were determined using the micro-atmosphere method. The original commercial essential oil samples of Jasminum officinale L., Thymus vulgaris L., Syzygium aromaticum (L.) Merrill & Perry, Rosmarinus officinalis L...
June 20, 2016: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
Raquel Rodríguez-Solana, Laura Vázquez-Araújo, José Manuel Salgado, José Manuel Domínguez, Sandra Cortés-Diéguez
BACKGROUND: Herbal liqueurs are alcoholic beverages produced by maceration or distillation of aromatic and medicinal plants, highly valued by their medicinal properties, in alcohol. The process conditions, the number and quantity of plant employed will have a great influence in the quality of the liqueur obtained. The aim of this research was to optimize these important variables. RESULTS: A Box-Benhken experimental design was used to evaluate the independent variables: alcohol content, amount of plant and time during the experimental maceration of plants in grape marc distillate...
May 28, 2016: Journal of the Science of Food and Agriculture
L Diaz-Balteiro, O Alfranca, J González-Pachón, C Romero
As forest managers and owners must have precise assessments of sustainability, in this study we have proposed a methodology based on multi-criteria techniques for assessing sustainability in industrial forest plantations and establishing a ranking of these plantations in terms of sustainability. First, we identified and have briefly described a set of sustainability indicators (economic, environmental and social). Next, we developed a statistical procedure to determine if a linear relationship existed between the indicators...
September 15, 2016: Journal of Environmental Management
Christian Hutterer, Gabriele Schild, Antje Potthast
The conversion of paper-grade pulps into dissolving pulps requires efficient strategies and process steps to remove low-molecular noncellulosic macromolecules generally known as hemicelluloses. Current strategies include alkaline extractions and enzymatic treatments. This study focused on the evaluation of extraction efficiencies in alkaline extractions of three economically interesting hardwood species: beech (Fagus sylvatica), birch (Betula papyrifera), and eucalyptus (Eucalyptus globulus). Substrate pulps were subjected to alkaline treatments at different temperatures and alkalinities using white liquor as the alkali source, followed by analyses of both pulps and hemicellulose-containing extraction lyes...
August 2016: Bioresource Technology
Teresa Ribeiro, Ricardo M Barrela, Hélène Bergès, Cristina Marques, João Loureiro, Leonor Morais-Cecílio, Jorge A P Paiva
The genus Eucalyptus encloses several species with high ecological and economic value, being the subgenus Symphyomyrtus one of the most important. Species such as E. grandis and E. globulus are well characterized at the molecular level but knowledge regarding genome and chromosome organization is very scarce. Here we characterized and compared the karyotypes of three economically important species, E. grandis, E. globulus, and E. calmadulensis, and three with ecological relevance, E. pulverulenta, E. cornuta, and E...
2016: Frontiers in Plant Science
Hiroko-Miyuki Mori, Hideo Iwahashi
Inappropriate use of essential oils may entail risks to human health due to mutational events, carcinogenic effects, genetic damages and sensitizing effect caused by generation of reactive oxygen species. In order to detect radicals that are expected to form during their oxidation, we measured the electron spin resonance (ESR) spectra of a standard reaction mixture (I) containing 25 μM flavin mononucleotide, 0.018% several essential oils (or 0.015% geraniol), 1.9 M acetonitrile, 20 mM phosphate buffer (pH 7...
June 2016: Free Radical Research
Rodrigo Hasbún, Carolina Iturra, Soraya Bravo, Boris Rebolledo-Jaramillo, Luis Valledor
Epigenetic regulation plays important biological roles in plants, including timing of flowering and endosperm development. Little is known about the mechanisms controlling heterochrony (the change in the timing or rate of developmental events during ontogeny) in Eucalyptus globulus. DNA methylation has been proposed as a potential heterochrony regulatory mechanism in model species, but its role during the vegetative phase in E. globulus has not been explored. In order to investigate the molecular mechanisms governing heterochrony in E...
2016: International Journal of Genomics
Susana Peleteiro, Valentín Santos, Gil Garrote, Juan Carlos Parajó
Eucalyptus globulus wood samples were treated with hot, compressed water to separate hemicelluloses (as soluble saccharides) from a solid phase mainly made up of cellulose and lignin. The liquid phase was dehydrated, and the resulting solids (containing pentoses as well as poly- and oligo- saccharides made up of pentoses) were dissolved and reacted in media containing an Acidic Ionic Liquid (1-butyl-3-methylimidazolium hydrogen sulfate) and a co-solvent (dioxane). The effects of the reaction time on the product distribution were studied at temperatures in the range 120-170°C for reaction times up to 8h, and operational conditions leading to 59...
August 1, 2016: Carbohydrate Polymers
Maria Jose Hernandez, Fernando Montes, Federico Ruiz, Gustavo Lopez, Pilar Pita
BACKGROUND AND AIMS: Stomatal conductance has long been considered of key interest in the study of plant adaptation to water stress. The expected increase in extreme meteorological events under a climate change scenario may compromise survival in Eucalyptus globulus plantations established in south-western Spain. We investigated to what extent changes in stomatal conductance in response to high vapour pressure deficits and water shortage are mediated by hydraulic and chemical signals in greenhouse-grown E...
May 2016: Annals of Botany
Dinesh B Madhavan, Matt Kitching, Daniel S Mendham, Christopher J Weston, Thomas G Baker
There is an increasing demand for rapid and cost effective techniques to accurately measure the effects of land use change on soil properties. This study evaluated the ability of mid-infrared spectroscopy (MIRS) coupled with partial least squares regression (PLSR) to rapidly predict soil properties affected by land use change from agriculture (mainly pasture) to Eucalyptus globulus plantations in south-western Australia. We measured total organic carbon (TOC), total nitrogen (Total N), TOC/Total N (C/N ratio), microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), and total phosphorus (Total P)...
June 15, 2016: Journal of Environmental Management
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"