2,663 research outputs found
A comparison of the moss floras of Chile and New Zealand
No full textChile and New Zealand share a common stock of 181 species of mosses in 94 genera and 34 families. This number counts for 23.3% of the Chilean and 34.6% of the New Zealand moss flora. If only species with austral distribution are taken into account, the number is reduced to 113 species in common, which is 14.5% of the Chilean and 21.6% of the New Zealand moss flora. This correlation is interpreted in terms of long distance dispersal resp. the common phytogeographical background of both countries as parts of the palaoaustral floristic region and compared with disjunct moss floras of other continents as well as the presently available molecular data
Insidious Deception, Alan Moss (Review)
No full textOriginally published in
Campbell, Ian (2014). Review of Alan Moss, Insidious Deception. Casper, WY: Whiskey Creek Press, 2012. Middle East Media and Book Reviews, 2(4).
Review posted with the permission of the publisher
Morphogenesis in the moss physcomitrella patens
No full textA method was developed for recording the development of moss protonema using time-lapse video microscopy. This has provided a detailed record of the time-course of development from spore germination to the production of gametophores. Detailed records of the growth of primary and secondary chloronema, the transition of primary
chloronema to caulonema, and the development of side-branches were obtained. Filaments were found to undergo the transition to caulonema earlier than previously
thought. The majority of caulonemas ide-branches were found to begin as chloronema and switch to caulonema after one or two cell cycles. The early cell divisions of bud
formation were found to follow a distinct pattern, which was upset by high concentrations of cytokinin and lanthanum. The response of caulonema apical cells to
polarotropic light was recorded and compared to the gravitropic response.
The time-lapse studies provided the basis for the further development of the quantitative analysis of protonemal branching patterns to include second and third
side-branches of a sub-apical cell, and transitional caulonema. Analysing side-branch patterns should allow the detection of developmental mechanisms underlying the
determination of side-branch fate. The potential of this method for assessing the effect of hormone treatments and for analysing more precisely mutant phenotypes was
explored. An analysis of bud spacing was carried out to determine if the formation of a bud on a filament was inhibitory to other buds forming on the same filament. It was found, to the contrary, that buds tended to form in clusters.
The hypothesis that the primary mode of action of cytokinin is an enhanced influx of calcium ions into the cell was investigated. Classical electrophysiology was used in
order to detect any change in membrane potential suggestive of ionic fluxes in response to cytokinin treatment. No definitive changes in membrane potential were detected in response to cytokinin. This appeared to rule out the involvement of voltage-regulated channels in cytokinin action. The effects of some inhibitors used in
studies of calcium on the moss protonemal system were examined. It is suggested that the concentrations commonly used had toxic effects that were not specific to calcium
channels. The ionophore A23187 was used to characterise the protonemal response to a sustained influx of calcium. Some mutant strains were found to have a differential
response to the ionophore. This may mean that they have mutations affecting their calcium regulatory system.
Two new techniques of imaging calcium were used in order to detect changes in intracellular calcium in response to cytokinin. A method was developed for loading the dual wavelength fluorescent dye Indo-1 into moss protonema using iontophoretic microinjection, and intracellular calcium was imaged using ratio-image technology. Wild-type moss and some mutant strains were also successfully transformed with the gene for apoaequorin, and calcium luminescence measured in response to cold-shock and plant hormones. Some different responsesto temperatures hock were apparent in
one of the transformed mutants. Preliminary experiments did not reveal any aequor independent calcium luminescence in response to cytokinin
ploewe/MOSS: v1.0
No full textThis is the first release of the MOSS codebase in its transient GitHub repository to ensure long term preservation of the codebase, scientific citation and due credit to the original authors (including Carl N Reed III and Sol Katz)
Oceanographic results from the VERTEX 3 Particle Interceptor Trap Experiment off central Mexico,October-December,1982
No full textIn this report, we present oceanographic results fromVERTEX 3 Particle Interceptor Trap (PIT) experimentconducted off the western-coast of Mexico during October toNovember 1982. The oceanographic data presented here wereobtained during three cruise legs by Moss Landing MarineLaboratory scientists aboard R/V Cayuse while the detailedchemical studies were done by other scientists aboard R/VWecoma. Only the oceanographic data will be presented inthis report. (PDF contains 82 pages)National Science Foundatio
S.M. Simpson Ltd. Tree Farm License no. 9 -- timber cruising, Alan Moss
No full textTimber cruising is a term referring to foresters and loggers assessing timber harvesting sites. Alan Moss was a forester for S.M. Simpson Ltd
IBM PC Data Acquisition and Processing Software Evaluation
No full textCommercially available software packages for IBM PC-compatibles are evaluated to use for data acquisition and processing work. Moss Landing Marine Laboratories (MLML) acquired computers since 1978 to use on shipboard data acquisition (Le. CTD, radiometric, etc.) and data processing. First Hewlett-Packard desktops were used then a transition to the DEC VAXstations, with software developed mostly by the author and others at MLML (Broenkow and Reaves, 1993; Feinholz and Broenkow, 1993; Broenkow et al, 1993). IBM PC were at first very slow and limited in available software, so they were not used in the early days. Improved technology such as higher speed microprocessors and a wide range of commercially available software made use of PC more reasonable today. MLML is making a transition towards using the PC for data acquisition and processing. Advantages are portability and available outside support
Hawking-Moss transition with a black hole seed
No full text\ua9 2020, The Author(s).We extend the concept of Hawking-Moss, or up-tunnelling, transitions in the early universe to include black hole seeds. The black hole greatly enhances the decay amplitude, however, order to have physically consistent results, we need to impose a new condition (automatically satisfied for the original Hawking-Moss instanton) that the cosmological horizon area should not increase during tunnelling. We motivate this conjecture physically in two ways. First, we look at the energetics of the process, using the formalism of extended black hole thermodynamics; secondly, we extend the stochastic inflationary formalism to include primordial black holes. Both of these methods give a physical substantiation of our conjecture
Resurrecting Dr. Moss the life and letters of a Royal Navy surgeon, Edward Lawton Moss MD, RN, 1843 - 1880
No full text"Resurrecting Dr. Moss chronicles the life and death of Edward Lawton Moss, a Royal Navy surgeon on the last great British north polar expedition of the nineteenth century. Arctic historians and bibliophiles are familiar with Moss's account of the1875-76 British Arctic Expedition, published under the title Shores of the Polar Sea, but little has been known about Moss himself. Now, thanks to Paul Appleton's painstaking research, his life has taken shape in this well-crafted biography." "Relying heavily on Moss's own letters, Appleton has created a portrait of a man he calls "an example of the best traditions of British naval medicine during the Victorian era." Author, artist, explorer, and scientist, Dr. Moss was also a pioneering medical officer. After being posted in British Columbia, he played a pivotal role in founding one of the earliest medical institutions on Canada's west coast, the hospital at the Esquimalt Naval Base. Dr. Moss's life was cut short at the age of thirty-seven when the HMS's Atalanta disappeared en route from Bermuda in 1880." "Resurrecting Dr. Moss includes several previously unpublished letters and is illustrated with a selection of Moss's watercolours."--BOOK JACKET
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