765 research outputs found
Fitzwilliam Museum McClean Bequest
No full textFrank McClean (1837–1904) was not only an astronomer and pioneer of objective prism spectrography, but also an accomplished and systematic collector of art, books and manuscripts. McClean's collections, which were left to the Fitzwilliam Museum, Cambridge, on his death, were at that time the most notable bequest since the Museum's foundation. The fifteenth- and sixteenth-century printed books in his bequest, most of them produced in continental Europe, are described here in detail, with bibliographical descriptions and information on their provenance. Illustrated books are listed separately. The author of the catalogue, Charles Edward Sayle (1864–1924) was an erudite and popular librarian whose career was devoted to cataloguing and editing rare books in the University of Cambridge. His obituary praised him as 'a fine example of the type of man who likes to catalogue things in the right order'.</jats:p
Development of single nucleotide polymorphisms in Phaseolus vulgaris and related Phaseolus spp
No full textIn this study, new single nucleotide polymorphism (SNP) markers were developed for common bean (Phaseolus vulgaris L.) and related Phaseolus species. The applied strategy presents new and interesting aspects, such as the choice of accessions used, which was aimed at capturing a large portion of the genetic diversity present in the common bean, with particular focus on wild and domesticated materials from Mesoamerica and the identification of loci for sequencing. Indeed, the primer pairs for 34 loci were designed with the main strategy being to search for single-copy orthologous genes among the legumes (for use in other legume species and comparative analyses). The 10 remaining loci were selected as being near to domestication quantitative trait loci or detected as putatively under selection during domestication in previous studies. To provide an efficient and inexpensive genotyping platform for geneticists and breeders, we used sequence data to develop 60 new SNP markers for KASPar assay genotyping. The same sample was also genotyped with SNP markers developed for common bean in other studies for the same assay. This allowed testing for systematic bias according to the criteria chosen to select the genotypes in which the genetic diversity is surveyed during SNP discovery. Finally, we show that most of the SNP markers worked well in a set of accessions of other species belonging to the Phaseolus genus. The genetic resources developed will be very useful not only for breeding, but also for biodiversity conservation management and evolutionary studies on legumes
Development of single nucleotide polymorphisms in Phaseolus vulgaris and related Phaseolus spp
No full textIn this study, new single nucleotide polymorphism (SNP) markers were developed for common bean (Phaseolus vulgaris L.) and related Phaseolus species. The applied strategy presents new and interesting aspects, such as the choice of accessions used, which was aimed at capturing a large portion of the genetic diversity present in the common bean, with particular focus on wild and domesticated materials from Mesoamerica and the identification of loci for sequencing. Indeed, the primer pairs for 34 loci were designed with the main strategy being to search forsingle-copy orthologous genes among the legumes (for use in other legume species and comparative analyses). The 10 remaining loci were selected as being near to domestication quantitative trait loci or detected as putatively under selection during domestication in previous studies. To provide an efficient and inexpensive genotyping platform for geneticists and breeders, we used sequence data to develop 60 new SNP markers for KASPar assay genotyping. The same sample was also genotyped with SNP markers developed for common bean in other studies for the same assay. This allowed testing for systematic bias according to the criteria chosen to select the genotypes in which the genetic diversity is surveyed during SNP discovery. Finally, we show that most of the SNP markers worked
well in a set of accessions of other species belonging to the Phaseolus genus. The genetic resources developed will be very useful not only for breeding, but also for biodiversity conservation management and evolutionary studies on legumes
Investigation of a resistive anode detector for astronomical spectroscopy
No full textA large format two dimensional photon counting detector has
been evaluated as a detector for astronomical spectroscopy. The
design comprises an 320 photocathode, a tandem MCP gain stage and a
circular arc terminated resisitive anode to provide pOSitional
coordinates of detected events. The system is run from an LSI 11/23
computer operating under FORTH control.
The micro-channel plate operating characteristics and the
detector's resolution, quantum efficiency and imaging performance
have been studied. The principal areas requiring design improvement
are found to be the micro-channel plate gain,
processing and photocathode quality.
electronic signal
The detector has been employed in a observing program on a
0.5 m telescope. Spectra of IAU faint radial velocity standards and
the eclipsing binary system s-l Cam have been obtained and analysed
to assess the system's performance
New Victory Mining Company Avon, Powell County, Montana
No full textMr. L.D. McClean and Mr. A. Schemel, officers of the New Victory Mining Company, requested an examination of the company\u27s properties near Avon, Montana. Following this request Mr. E. Renouard Jr., and Mr. E.P. Shea visited the properties on March 2nd and 3rd, 1935, and submit herewith the following report
Demographic factors shaped diversity in the two gene pools of wild common bean Phaseolus vulgaris L.
No full textDevelopment of single nucleotide polymorphisms in Phaseolus vulgaris and related Phaseolus spp.
No full text
Mesoamerican origin of the common bean (Phaseolus vulgaris L.) is revealed by sequence data
No full textKnowledge about the origins and evolution of crop species represents
an important prerequisite for efficient conservation and use
of existing plant materials. This study was designed to solve the
ongoing debate on the origins of the common bean by investigating
the nucleotide diversity at five gene loci of a large sample that
represents the entire geographical distribution of the wild forms of
this species. Our data clearly indicate a Mesoamerican origin of the
common bean. They also strongly support the occurrence of a
bottleneck during the formation of the Andean gene pool that
predates the domestication, which was suggested by recent studies
based on multilocus molecular markers. Furthermore, a remarkable
result was the genetic structure that was seen for the Mesoamerican
accessions, with the identification of four different genetic groups
that have different relationships with the sets of wild accessions
from the Andes and northern Peru–Ecuador. This finding implies
that both of the gene pools from South America originated through
different migration events from the Mesoamerican populations that
were characteristic of central Mexico
Factors Affecting the Success of E-Learning-Based Training using Learning Management System Platforms: Adaptations of Updated DeLone and McLean Models
No full textThe purpose of this study is to determine the factors, both direct and indirect, that affect the success of the learning management systems implemented in the Ministry of Education's “Sekolah Penggerak” training program. The DeLone-McClean IS Success Model was modified to be used as the study's analysis tool. The study employed a quantitative method with 122 samples. The survey technique employing Google Forms was used in the data collection process. The Partial Least Square Structural Model was analyzed using the Smart-PLS 3.0 software. As the t-statistic value was more than 1.96 and the p-value was less than 0.05, all hypotheses testing direct influence on success were accepted. Only four of the thirteen hypotheses on indirect influence were rejected. In conclusion, the DeLone-McClean IS Success Model can be used to evaluate the effectiveness of a learning management system in various e-learning activities
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