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https://www.readbyqxmd.com/read/28335570/an-improved-multi-sensor-fusion-navigation-algorithm-based-on-the-factor-graph
#1
Qinghua Zeng, Weina Chen, Jianye Liu, Huizhe Wang
An integrated navigation system coupled with additional sensors can be used in the Micro Unmanned Aerial Vehicle (MUAV) applications because the multi-sensor information is redundant and complementary, which can markedly improve the system accuracy. How to deal with the information gathered from different sensors efficiently is an important problem. The fact that different sensors provide measurements asynchronously may complicate the processing of these measurements. In addition, the output signals of some sensors appear to have a non-linear character...
March 21, 2017: Sensors
https://www.readbyqxmd.com/read/28335521/gene-transformation-induced-changes-in-chemical-functional-group-features-and-molecular-structure-conformation-in-alfalfa-plants-co-expressing-lc-bhlh-and-c1-myb-transcriptive-flavanoid-regulatory-genes-effects-of-single-gene-and-two-gene-insertion
#2
Ravindra G Heendeniya, Peiqiang Yu
Alfalfa (Medicago sativa L.) genotypes transformed with Lc-bHLH and Lc transcription genes were developed with the intention of stimulating proanthocyanidin synthesis in the aerial parts of the plant. To our knowledge, there are no studies on the effect of single-gene and two-gene transformation on chemical functional groups and molecular structure changes in these plants. The objective of this study was to use advanced molecular spectroscopy with multivariate chemometrics to determine chemical functional group intensity and molecular structure changes in alfalfa plants when co-expressing Lc-bHLH and C1-MYB transcriptive flavanoid regulatory genes in comparison with non-transgenic (NT) and AC Grazeland (ACGL) genotypes...
March 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28334292/the-synergistic-effects-of-almond-protection-fungicides-on-honey-bee-hymenoptera-apidae-forager-survival
#3
Adrian Fisher, Chet Coleman, Clint Hoffmann, Brad Fritz, Juliana Rangel
The honey bee (Apis mellifera L.) contributes ∼$17 billion annually to the United States economy, primarily by pollinating major agricultural crops including almond, which is completely dependent on honey bee pollination for nut set. Almond growers face constant challenges to crop productivity owing to pests and pathogens, which are often controlled with a multitude of agrochemicals. For example, fungicides are often applied in combination with other products to control fungal pathogens during almond bloom...
March 21, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334153/efficacy-of-insect-growth-regulators-and-diamide-insecticides-for-control-of-stem-borers-lepidoptera-crambidae-in-sugarcane
#4
B E Wilson, M T VanWeelden, J M Beuzelin, T E Reagan, J A Prado
Field experiments assessed control of the stem borers, Diatraea saccharalis (F.) and Eoreuma loftini (Dyar), in sugarcane (Saccharum spp.) with selected insect growth regulators and diamide insecticides. Tebufenozide, novaluron, chlorantraniliprole, and flubendiamide were evaluated for D. saccharalis control in four field experiments in Louisiana between 2009 and 2014. Aerial application of the same insecticides was evaluated for control of E. loftini in commercial sugarcane fields in southern Texas in 2012 and 2015...
February 22, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28333621/reconstructing-evolving-tree-structures-in-time-lapse-sequences-by-enforcing-time-consistency
#5
Przemyslaw Glowacki, Miguel Amavel Pinheiro, Agata Mosinska, Engin Turetken, Daniel Lebrecht, Anthony Holtmaat, Raphael Sznitman, Jan Kybic, Pascal Fua
We propose a novel approach to reconstructing curvilinear tree structures evolving over time, such as road networks in 2D aerial images or neural structures in 3D microscopy stacks acquired in vivo. To enforce temporal consistency, we simultaneously process all images in a sequence, as opposed to reconstructing structures of interest in each image independently. We formulate the problem as a Quadratic Mixed Integer Program and demonstrate the additional robustness that comes from using all available visual clues at once, instead of working frame by frame...
March 10, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28332760/cytotoxic-essential-oils-from-eryngium-campestre-and-eryngium-amethystinum-apiaceae-growing-in-central-italy
#6
Kevin Cianfaglione, Evy E Blomme, Luana Quassinti, Massimo Bramucci, Giulio Lupidi, Stefano Dall'Acqua, Filippo Maggi
Eryngium campestre and E. amethystinum are thorny herbs belonging to the Apiaceae family and spontaneously growing in stony pastures and dry meadows, preferentially on calcareous substrates. In the Mediterranean countries, these plants have been used as a food or traditional remedies to treat various ailments. In the present work, we have analysed the chemical composition of the essential oils distilled from the aerial parts by GC-FID and GC-MS, and evaluated their cytotoxic effects on a panel of human cancer cells, namely A375 (human malignant melanoma), MDA-MB 231 cells (human breast adenocarcinoma) and HCT116 cells (human colon carcinoma), by the MTT assay...
March 23, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28331789/light-like-a-feather-a-fibrous-natural-composite-with-a-shape-changing-from-round-to-square
#7
Bin Wang, Marc André Meyers
Only seldom are square/rectangular shapes found in nature. One notable exception is the bird feather rachis, which raises the question: why is the proximal base round but the distal end square? Herein, it is uncovered that, given the same area, square cross sections show higher bending rigidity and are superior in maintaining the original shape, whereas circular sections ovalize upon flexing. This circular-to-square shape change increases the ability of the flight feathers to resist flexure while minimizes the weight along the shaft length...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331551/environmental-costs-and-benefits-of-growing-miscanthus-for-bioenergy-in-the-uk
#8
REVIEW
Jon P McCalmont, Astley Hastings, Niall P McNamara, Goetz M Richter, Paul Robson, Iain S Donnison, John Clifton-Brown
Planting the perennial biomass crop Miscanthus in the UK could offset 2-13 Mt oil eq. yr(-1), contributing up to 10% of current energy use. Policymakers need assurance that upscaling Miscanthus production can be performed sustainably without negatively impacting essential food production or the wider environment. This study reviews a large body of Miscanthus relevant literature into concise summary statements. Perennial Miscanthus has energy output/input ratios 10 times higher (47.3 ± 2.2) than annual crops used for energy (4...
March 2017: Global Change Biology. Bioenergy
https://www.readbyqxmd.com/read/28330559/dge-seq-analysis-of-mur3-related-arabidopsis-mutants-provides-insight-into-how-dysfunctional-xyloglucan-affects-cell-elongation
#9
Zongchang Xu, Meng Wang, Dachuan Shi, Gongke Zhou, Tiantian Niu, Michael G Hahn, Malcolm A O'Neill, Yingzhen Kong
Our previous study of the Arabidopsis mur3-3 mutant and mutant plants in which the mur3-3 phenotypes are suppressed (xxt2mur3-3, xxt5mur3-3, xxt1xxt2mur3-3 and 35Spro:XLT2:mur3-3) showed that hypocotyl cell elongation is decreased in plants that synthesize galactose-deficient xyloglucan. To obtain genome-wide insight into the transcriptome changes and regulatory networks that may be involved in this decreased elongation, we performed digital gene expression analyses of the etiolated hypocotyls of wild type (WT), mur3-3 and the four suppressor lines...
May 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28330254/enhanced-production-of-an-anti-malarial-compound-artesunate-by-hairy-root-cultures-and-phytochemical-analysis-of-artemisia-pallens-wall
#10
Zarna Pala, Vishnu Shukla, Anshu Alok, Subhash Kudale, Neetin Desai
Artemisinin and its derivatives are still one of the most effective drugs for the treatment of malaria. Artemisia pallens commonly known as Dhavanam, is an aromatic herb belonging to the family Asteraceae. Increasing the artemisinin content of A. pallens by genetic engineering would improve the availability of this much needed drug. In the present study, Agrobacterium rhizogenes (strain NCIM 5140) mediated genetic transformation of Artemisia pallens were carried out for hairy root induction. The effect of different media (Half MS, MS, MS along with BAP 0...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28327591/gully-evolution-and-geomorphic-adjustments-of-badlands-to-reforestation
#11
J A Ballesteros Cánovas, M Stoffel, J F Martín-Duque, C Corona, A Lucía, J M Bodoque, D R Montgomery
Badlands and gullied areas are among those geomorphic environments with the highest erosion rates worldwide. Nevertheless, records of their evolution and their relations with anthropogenic land transformation are scarcer. Here we combine historical data with aerial photographs and tree-ring records to reconstruct the evolution of a badland in a Mediterranean environment of Central Spain. Historical sources suggest an anthropogenic origin of this badland landscape, caused by intense quarrying activities during the 18(th) century...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28325594/assessment-of-multi-trophic-changes-in-a-shallow-boreal-lake-simultaneously-exposed-to-climate-change-and-aerial-deposition-of-contaminants-from-the-athabasca-oil-sands-region-canada
#12
Jamie C Summers, Joshua Kurek, Kathleen M Rühland, Erin E Neville, John P Smol
The Athabasca Oil Sands Region (AOSR) has been intensely developed for industrial bitumen extraction and upgrading since the 1980s. A paucity of environmental monitoring prior to development raises questions about baseline conditions in freshwater systems in the region and ecological responses to industrial activities. Further, climatic changes prompt questions about the relative roles of climate and industry in shaping aquatic ecosystems through time. We use aquatic bioindicators from multiple trophic levels, concentrations of petrogenic contaminants (dibenzothiophenes), and spectrally-inferred chlorophyll-a preserved in well-dated sediments of a closed-basin, shallow lake ~50km away from the main area of industry, in conjunction with climate observations, to assess how the biotic assemblages of a typical AOSR lake have changed during the past ~75years...
March 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28324743/visual-tracking-hot-pursuit-with-tiny-eyes
#13
Eric J Warrant
Flying insect predators intercept their aerial prey with deadly precision. New research reveals that a tiny robber fly, with a brain smaller than a pinhead, achieves this using the same visual mechanism that we ourselves employ to catch a passing ball.
March 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28323046/centaurium-erythraea-methanol-extract-protects-red-blood-cells-from-oxidative-damage-in-streptozotocin-induced-diabetic-rats
#14
Miloš Đorđević, Mirjana Mihailović, Jelena Arambašić Jovanović, Nevena Grdović, Aleksandra Uskoković, Anja Tolić, Marija Sinadinović, Jovana Rajić, Danijela Mišić, Branislav Šiler, Goran Poznanović, Melita Vidaković, Svetlana Dinić
ETHNOPHARMACOLOGICAL RELEVANCE: Centaurium erythraea Rafn (CE) is a traditional medicinal herb in Serbia with antidiabetic, digestive, antipyretic and antiflatulent effects. AIM OF THE STUDY: To investigate the potential protective effects of the methanol extract of the aerial parts of CE against glyco-oxidative stress in red blood cells (RBCs) in rats with experimentally induced diabetes. MATERIAL AND METHODS: Diabetes was induced in Wistar rats by intraperitoneal (i...
March 16, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28320487/the-application-of-contrast-media-for-in-vivo-feature-enhancement-in-x-ray-computed-tomography-of-soil-grown-plant-roots
#15
Samuel D Keyes, Neil J Gostling, Jessica H Cheung, Tiina Roose, Ian Sinclair, Alan Marchant
The use of in vivo X-ray microcomputed tomography (μCT) to study plant root systems has become routine, but is often hampered by poor contrast between roots, soil, soil water, and soil organic matter. In clinical radiology, imaging of poorly contrasting regions is frequently aided by the use of radio-opaque contrast media. In this study, we present evidence for the utility of iodinated contrast media (ICM) in the study of plant root systems using μCT. Different dilutions of an ionic and nonionic ICM (Gastrografin 370 and Niopam 300) were perfused into the aerial vasculature of juvenile pea plants via a leaf flap (Pisum sativum)...
March 21, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28315795/differential-auxin-transport-and-accumulation-in-the-stem-base-lead-to-profuse-adventitious-root-primordia-formation-in-the-aerial-roots-aer-mutant-of-tomato-solanum-lycopersicum-l
#16
F Mignolli, L Mariotti, P Picciarelli, M L Vidoz
The aerial roots (aer) mutant of tomato is characterized by a profuse and precocious formation of adventitious root primordia along the stem. We demonstrated that auxin is involved in the aer phenotype but ruled out higher auxin sensitivity of mutant plants. Interestingly, polar auxin transport was altered in aer, as young seedlings showed a reduced response to an auxin transport inhibitor and higher expression of auxin export carriers SlPIN1 and SlPIN3. An abrupt reduction in transcripts of auxin efflux and influx genes in older aer hypocotyls caused a marked deceleration of auxin transport in more mature tissues...
February 27, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28306206/phytochemical-profile-and-biological-activities-of-helianthemum-canum-from-turkey
#17
Ayşe Baldemir, Neslihan Gökşen, Nilay Ildız, Gökçe Şeker Karatoprak, Müberra Koşar
In the current study, antioxidant, antibacterial activities, and the phenolic compositions of extracts from Helianthemum canum L. Baumg (Apiaceae) aerial parts were investigated for the first time. The H. canum was extracted with 70% methanol (HCMeOH) and water (HCW). Both extracts were determined by total phenolic contents (3 mg/mL), flavonoids (1.5 mg/mL), flavonols (1.5 mg/mL), qualitative-quantitative compositions, iron (II) chelation activities (0.1-5 mg/mL), free radical scavenging activities (DPPH(●) : 0...
March 17, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28300699/monomeric-and-dimeric-ent-kauranoid-type-diterpenoids-from-rabdosia-japonica-and-their-cytotoxicity-and-anti-hbv-activities
#18
Hong-Chuan Liu, Zhao-Bao Xiang, Qiang Wang, Bo-Yan Li, Yong-Sheng Jin, Hai-Sheng Chen
Two new ent-kauranoid-type diterpenoids (1 and 2) and one new rare dimer of ent-kauranoids (3) with a cyclobutane ring by a [2+2] cycloaddition, together with nine known diterpenoids (4-12) were obtained from the aerial parts of Rabdosia japonica. Their chemical structures were established by 1D and 2D NMR techniques and mass spectrometry and by comparison with spectroscopic data reported. All ent-kauranoids were test for their cytotoxic effects against A549, HCT116, CCRF-CEM and HL-60 tumor cell lines. Compounds 1, 2, 4, 5, 7, 10 and 12 showed potent and selective cytotoxicity...
March 12, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28300698/antibacterial-screening-of-rumex-species-native-to-the-carpathian-basin-and-bioactivity-guided-isolation-of-compounds-from-rumex-aquaticus
#19
Orsolya Orbán-Gyapai, Erika Liktor-Busa, Norbert Kúsz, Dóra Stefkó, Edit Urbán, Judit Hohmann, Andrea Vasas
Plants belonging to the genus Rumex (family Polygonaceae) are used worldwide in traditional medicine for the treatment of various diseases caused by different microorganisms (e.g. bacteria-related dermatologic conditions, dysentery and enteritis). The present study focused on the antibacterial screening of Rumex species native to the Carpathian Basin, and isolation of compounds from one of the most efficient species, Rumex aquaticus. The antibacterial effects of n-hexane, chloroform and aqueous fractions of methanol extracts prepared from different parts of 14 Rumex species (R...
March 11, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28300113/global-warming-and-recurrent-mass-bleaching-of-corals
#20
Terry P Hughes, James T Kerry, Mariana Álvarez-Noriega, Jorge G Álvarez-Romero, Kristen D Anderson, Andrew H Baird, Russell C Babcock, Maria Beger, David R Bellwood, Ray Berkelmans, Tom C Bridge, Ian R Butler, Maria Byrne, Neal E Cantin, Steeve Comeau, Sean R Connolly, Graeme S Cumming, Steven J Dalton, Guillermo Diaz-Pulido, C Mark Eakin, Will F Figueira, James P Gilmour, Hugo B Harrison, Scott F Heron, Andrew S Hoey, Jean-Paul A Hobbs, Mia O Hoogenboom, Emma V Kennedy, Chao-Yang Kuo, Janice M Lough, Ryan J Lowe, Gang Liu, Malcolm T McCulloch, Hamish A Malcolm, Michael J McWilliam, John M Pandolfi, Rachel J Pears, Morgan S Pratchett, Verena Schoepf, Tristan Simpson, William J Skirving, Brigitte Sommer, Gergely Torda, David R Wachenfeld, Bette L Willis, Shaun K Wilson
During 2015-2016, record temperatures triggered a pan-tropical episode of coral bleaching, the third global-scale event since mass bleaching was first documented in the 1980s. Here we examine how and why the severity of recurrent major bleaching events has varied at multiple scales, using aerial and underwater surveys of Australian reefs combined with satellite-derived sea surface temperatures. The distinctive geographic footprints of recurrent bleaching on the Great Barrier Reef in 1998, 2002 and 2016 were determined by the spatial pattern of sea temperatures in each year...
March 15, 2017: Nature
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