scholarly journals Juncus bulbosus (Juncaceae), a species new to South America (Chile)

2011 ◽  
Vol 77 (3) ◽  
pp. 225-227 ◽  
Author(s):  
Jarosław Proćków
Keyword(s):  
South America ◽  
World Wide ◽  
Invasive Plant ◽  
Geographical Location ◽  
Climatic Conditions ◽  
The World ◽  
Juncus Bulbosus

The first localities of <em>Juncus bulbosus</em> (<em>Juncaceae</em>) for South America (Chile) and for the whole south-western part of the world (S latitude and E longitude) are described, including precise geographical location and climatic conditions. General remarks on the invasiveness of the species and on the possibility of finding it in other parts of the world are given. The distribution of the species world-wide requires further studies, since the bulbous rush has become an invasive plant in areas where it did not occur before.

Cyclic Sedimentation: A Review

1960 ◽  
Vol 97 (5) ◽  
pp. 389-403 ◽  
Author(s):  
Alan J. Wells
Keyword(s):  
North America ◽  
World Wide ◽  
Sedimentary Basin ◽  
Geographical Location ◽  
Depositional Environments ◽  
Lateral Migration ◽  
Lateral Variation ◽  
Sea Floor ◽  
Cyclic Sedimentation ◽  
The World

AbstractThe well-known Carboniferous cyclothems of North America and Europe are discussed as examples to illustrate the great extent and lateral variation of sedimentary cycles. Very many other instances of cyclic sedimentation, in rocks of most ages, in many parts of the world, are also characterized by a more or less regular lateral migration of simultaneously existing depositional environments, caused by repeated transgressions and regressions of the sea over an epicontinental platform. Theories of varying complexity which have sought to explain cyclic sedimentation are briefly summarized, and it is suggested that the two basic requirements are a slowly subsiding sedimentary basin and more or less regular eustatic changes of sea level. The former will decide the geographical location. The latter could be a natural, periodic and world-wide consequence of the combination of the continuous effects of sedimentation and sostatic or orogenic movements of the sea floor.

scholarly journals The evolutionary history of the current globalRamularia collo-cygniepidemic

2017 ◽  
Author(s):  
Remco Stam ◽  
Hind Sghyer ◽  
Martin Münsterkötter ◽  
Saurabh Pophaly ◽  
Aurélien Tellier ◽  
...  
Keyword(s):  
World Wide ◽  
De Novo ◽  
Geographical Location ◽  
Control Measures ◽  
Genomic Comparison ◽  
Ramularia Leaf Spot ◽  
The World ◽  
Genome Features ◽  
History Of ◽  
Species Specific

AbstractRamularia Leaf Spot (RLS) has emerged as a threat for barley production in many regions of the world. Late appearance of unspecific symptoms caused thatRamularia collo-cygnicould only by molecular diagnostics be detected as the causal agent of RLS. Although recent research has shed more light on the biology and genomics of the pathogen, the cause of the recent global spread remains unclear.To address urgent questions, especially on the emergence to a major disease, life-cycle, transmission, and quick adaptation to control measures, we de-novo sequenced the genome ofR. collo-cygni(urug2 isolate). Additionally, we sequenced fungal RNA from 6 different conditions, which allowed for an improved genome annotation. This resulted in a high quality draft assembly of about 32 Mb, with only 78 scaffolds with an N50 of 2.1 Mb. The overall annotation enabled the prediction of 12.346 high confidence genes. Genomic comparison revealed thatR. collo-cygnihas significantly diverged from relatedDothidiomycetes, including gain and loss of putative effectors, however without obtaining species-specific genome features.To evaluate the species-wide genetic diversity, we sequenced the genomes of 19R. collo-cygniisolates from multiple geographic locations and diverse hosts and mapped sequences to our reference genome. Admixture analyses show thatR. collo-cygniis world-wide genetically uniform and that samples do not show a strong clustering on either geographical location or host species. To date, the teleomorph ofR. collo-cygnihas not been observed. Analysis of linkage disequilibrium shows that in the world-wide sample set there are clear signals of recombination and thus sexual reproduction, however these signals largely disappear when excluding three outliers samples, suggesting that the main global expansion ofR. collo-cygnicomes from mixed or clonally propagating populations. We further analysed the historic population size (Ne) ofR. collo-cygniusing Bayesian simulations.We discuss how our genomic data and population genetics analysis can help understand the currentR. collo-cygniepidemic and provide different hypothesis that are supported by our data. We specifically highlight how recombination, clonal spreading and lack of host-specificity could further support global epidemics of this increasingly recognized plant disease and suggest specific approaches to combat this pathogen.

Collaboration Among Multicultural Virtual Teams

2011 ◽  
pp. 256-263
Author(s):  
Kursat Cagiltay ◽  
Barbara A. Bichelmeyer ◽  
Michael A. Evans ◽  
Trena M. Paulus ◽  
Jae Soon An
Keyword(s):  
Information And Communication Technologies ◽  
Virtual Teams ◽  
World Wide ◽  
Geographical Location ◽  
Communication Technologies ◽  
Communication Tools ◽  
The World ◽  
Information And Communication ◽  
Problem Solve ◽  
E Mail

Due to the increasingly widespread use of various information and communication technologies (ICT), individuals from different countries and cultures are able to learn and work collaboratively in virtual environments (Mowshowitz, 1997). Electronic communication tools, such as chat, e-mail, and the World Wide Web, now make it possible for students and employees to communicate and problem solve with colleagues irrespective of geographical location (Scott, 2000).

scholarly journals Study on the Penicillin-content of botrytized wines and noble rotted berries in Tokaj-region

2003 ◽  
Vol 9 (2) ◽  
Author(s):  
M. Kállay ◽  
Zs. Bene
Keyword(s):  
Botrytis Cinerea ◽  
Therapeutic Effect ◽  
Penicillium Chrysogenum ◽  
World Wide ◽  
Climatic Conditions ◽  
The Other ◽  
Raw Material ◽  
Penicillin V ◽  
The World

Favourable parameters are offered to the formation of noble rot caused by Botrytis cinerea by the climatic conditions, soil circumstances and grape-varietes of Tokaj-region. As the result of noble rot, aszú-berries represent the most important raw material of the world-wide known Tokaji Aszú Wine. The objective of this study was to measure the penicillin-content of aszú-berries and Tokaj Wine Specialities. As the result of infection of Botrytis free way can be opened in front of other mould strains, especially Penicillium and Aspergillus. There is a possibility to the presence of Penicillium chrysogenum on the surface of aszú-berries during noble rotting process. P. chrysogenum was found to produce the so called Naturally Derived Penicillins such as Penicillin-V (phenoximethyl-penicillin). According to our findings the Penicillin-V content was detected between 0.4 and 26 mg/1 wine and 0-74 mg/kg aszú-berry. These values do net have therapeutic effect, but physiological benefit and it can be a basis to the qualification of the raw material of Tokaj Wine Specialities naturally together with the other component of noble rotted berries and botrytized wines.

Success Achieved Using High Performance VHB™ Tapes in a Harsh Outdoor Application

2005 ◽  
Author(s):  
Nancy Bailey ◽  
S. Jimmy Hwang
Keyword(s):  
High Performance ◽  
Geographical Location ◽  
Climatic Conditions ◽  
American Southwest ◽  
Winter Temperatures ◽  
Global Positioning ◽  
The World ◽  
Positioning Device ◽  
Outdoor Application ◽  
Northern Alaska

The Qualcomm OmniTRACS™ Antenna Communications Unit (ACU) is a mobile transceiver which when installed on trucks allows two-way communication between drivers and fleet logistic centers. A global positioning device (GPS) inside the ACU shows controllers the geographical location of the truck and its cargo. The ACU is deployed in frequently harsh, inhospitable regions of the world and as such must operate reliably when exposed to diverse climatic conditions such as high humidity encountered in the Amazon River basin, extreme heat typical of deserts in the American southwest and while operating in northern Alaska where the terrain is rugged and winter temperatures reach −40C.

Rotational Characteristics of the Green Solar Corona: 1947-1991

1994 ◽  
Vol 144 ◽  
pp. 139-141 ◽  
Author(s):  
J. Rybák ◽  
V. Rušin ◽  
M. Rybanský
Keyword(s):  
Solar Corona ◽  
World Wide ◽  
Rotation Period ◽  
Original Data ◽  
Coronal Emission ◽  
Time Intervals ◽  
Data Set ◽  
The World ◽  
Coronal Emission Line ◽  
Homogeneous Data

AbstractFe XIV 530.3 nm coronal emission line observations have been used for the estimation of the green solar corona rotation. A homogeneous data set, created from measurements of the world-wide coronagraphic network, has been examined with a help of correlation analysis to reveal the averaged synodic rotation period as a function of latitude and time over the epoch from 1947 to 1991.The values of the synodic rotation period obtained for this epoch for the whole range of latitudes and a latitude band ±30° are 27.52±0.12 days and 26.95±0.21 days, resp. A differential rotation of green solar corona, with local period maxima around ±60° and minimum of the rotation period at the equator, was confirmed. No clear cyclic variation of the rotation has been found for examinated epoch but some monotonic trends for some time intervals are presented.A detailed investigation of the original data and their correlation functions has shown that an existence of sufficiently reliable tracers is not evident for the whole set of examinated data. This should be taken into account in future more precise estimations of the green corona rotation period.

Dancing Across the World Wide Web: Advocacy in the 21st Century

2009 ◽  
Author(s):  
Blair Williams Cronin ◽  
Ty Tedmon-Jones ◽  
Lora Wilson Mau
Keyword(s):  
World Wide Web ◽  
21St Century ◽  
World Wide ◽  
The World
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