377 research outputs found
Letter from Lydia Becker to Miles Berkeley 27 June 1870
No full textThis is a PDF of a scan of a letter from Lydia Becker (1827-1890) to Rev. Miles Joseph Berkeley (1803-1889) written on 27 June 1870. This letter is mentioned in footnote 12 of Antonovics J, Gibby M, and Hood ME. 2020. John Leigh, Lydia Becker and their shared botanical interests. Archives of Natural History (in press). The original of the letter is in personal possession of Michael Hood, co-author on this paper. Lydia Becker was a botanist and pioneer in the women's suffrage movement, and Miles Berkeley was a leading mycologist best known for his identification of the fungus responsible for potato blight, the cause of the Irish potato famine. In this letter, Becker rebukes Berkeley for describing in an article in Nature the anther-smut disease (Microbotryum) of red campion (Silene dioica) yet failing to cite her as the source of the original study. Becker also corresponded with Darwin about her work on anther smut
Dataset for sixty-six million years along the road of mammalian ecomorphological specialization.
No full textLa base de datos hace referencia al artículo: Figueirido, B., Palmqvist, P., Pérez-Claros, J. A., & Janis, C. M. (2019). Sixty-six million years along the road of mammalian ecomorphological specialization. Proceedings of the National Academy of Sciences, 116(26), 12698-12703. En ella se establece la clasificación por ecotipos de dieta, locomoción y masa corporal para las especies utilizadas en el artículo. Las categorías ecológicas proceden de NOW database.Ministerio de Ciencia, Innovación y Universidade
The evaluation of a school food service nutrition education program in New Mexico and Oklahoma public schools
No full textTypescript (photocopy).The purpose of this study was to evaluate the School Food Service Nutrition Awareness Project which was developed by the southwest region nutritionists of the Dairy Council, Incorporated (DCI), during 1979. The effectiveness of the program was determined by the amount of information which the food service workers learned at DCI workshops, the use of the DCI materials kit given to teach school food service, and the change in student food preferences and participation in the School Lunch Program at each of the schools. Eighteen Oklahoma schools and 26 New Mexico schools which included kindergarten through sixth grade classes participated in the study. All of the food service workers and one sixth grade class at each school were administered pre- and posttest to determine the effectiveness of the DCI project. The school food service workers at all schools increased in nutrition knowledge after the DCI workshop. In addition, all schools used the DCI kit of materials and most schools preferred using visual aids in the cafeteria rather than conducting nutrition education activities. The student participation in each state increased slightly and student food preferences showed a slight increase for the bread and cereals food group. Recommendations for future research include determining other variables, assessing usefulness of information, and determining which of the activity choices would be most useful in school food service programs
Locomotion in extinct giant kangaroos: were sthenurines hop-less monsters?
No full textThe extinct \u27sthenurine\u27 family of giant Kangaroos, up to three times larger than living Kangaroos, were able to walk on two feet, according to new research.
Abstract
Sthenurine kangaroos (Marsupialia, Diprotodontia, Macropodoidea) were an extinct subfamily within the family Macropodidae (kangaroos and rat-kangaroos). These “short-faced browsers” first appeared in the middle Miocene, and radiated in the Plio-Pleistocene into a diversity of mostly large-bodied forms, more robust than extant forms in their build. The largest (Procoptodon goliah) had an estimated body mass of 240 kg, almost three times the size of the largest living kangaroos, and there is speculation whether a kangaroo of this size would be biomechanically capable of hopping locomotion. Previously described aspects of sthenurine anatomy (specialized forelimbs, rigid lumbar spine) would limit their ability to perform the characteristic kangaroo pentapedal walking (using the tail as a fifth limb), an essential gait at slower speeds as slow hopping is energetically unfeasible. Analysis of limb bone measurements of sthenurines in comparison with extant macropodoids shows a number of anatomical differences, especially in the large species. The scaling of long bone robusticity indicates that sthenurines are following the “normal” allometric trend for macropodoids, while the large extant kangaroos are relatively gracile. Other morphological differences are indicative of adaptations for a novel type of locomotor behavior in sthenurines: they lacked many specialized features for rapid hopping, and they also had anatomy indicative of supporting their body with an upright trunk (e.g., dorsally tipped ischiae), and of supporting their weight on one leg at a time (e.g., larger hips and knees, stabilized ankle joint). We propose that sthenurines adopted a bipedal striding gait (a gait occasionally observed in extant tree-kangaroos): in the smaller and earlier forms, this gait may have been employed as an alternative to pentapedal locomotion at slower speeds, while in the larger Pleistocene forms this gait may have enabled them to evolve to body sizes where hopping was no longer a feasible form of more rapid locomotion
Please don't keep me waiting.
No full textGift of Dr. Mary Jane Esplen.Piano vocal [instrumentation]One mistake I find is very common [first line]Please don't keep me waiting life is but a span [first line of chorus]G major [key]Allegretto [tempo]Popular song [form/genre]Decorative; photo: Elsie Janis [illustration]Thos. Anderson Music, Hamilton ON [dealer stamp]Publisher's advertisement on back cover [note
Effects of calcium channel blockers on pharmacologically induced contractions of rainbow trout (Oncorhynchus mykiss) intestine
No full textPT: J; CR: BERRIDGE MJ, 1988, P R SOC LONDON B, V234, P359 BRINK C, 1981, J PHARMACOL EXP THER, V217, P592 BURKA JF, 1989, ANIMAL DRUGS FOOD SA, P110 BURKA JF, 1989, CAN J PHYSIOL PHARM, V67, P477 BURKA JF, 1990, IN PRESS CAN J PHYSL, V68 BURNSTOCK G, 1958, BRIT J PHARMACOL CHE, V13, P216 BURNSTOCK G, 1959, Q J MICROSC SCI, V100, P199 CARPENTER JR, 1986, J PHARMACOL METHOD, V15, P283 COOK DA, 1977, FED PROC, V36, P2584 HOAR WS, 1967, LABORATORY COMPANION ISHIKAWA S, 1985, BRIT J PHARMACOL, V86, P789 JANIS RA, 1983, BIOCHEM PHARMACOL, V32, P3499 JANIS RA, 1983, J MED CHEM, V26, P775 KARAKI H, 1988, LIFE SCI, V42, P111 KITCHEN I, 1984, TXB INVITRO PRACTICA LEFF P, 1987, J PHARMACOL EXP THER, V240, P284 SAIDA K, 1983, BLOOD VESSELS, V20, P105 SCHWARTZ A, 1984, ANNU REV MED, V35, P325 SMALL RC, 1982, BRIT J PHARMACOL, V77, P45 SPEDDING M, 1988, ANN NY ACAD SCI, V522, P248 VANBREEMEN C, 1979, PHARMACOL REV, V30, P167 WOLOWYK MW, 1987, J THERM BIOL, V12, P87; NR: 22; TC: 2; J9: FISH PHYSIOL BIOCHEM; PG: 7; GA: EG368Source type: Electronic(1
Explicit vs. Implicit Coordination Mechanisms and Task Dependencies: One Size Does Not Fit All (Forth Coming)
No full textForth Coming in:
Team Cognition: Process and Performance at the Inter- and Intra-individual Level Eduardo Salas, Stephen M. Fiore, and Janis A. Cannon-Bowers (Editors
Myth of the <i>QANTAS</i> leap: perspectives on the evolution of kangaroo locomotion
No full textThe distinctive QANTAS ‘flying kangaroo’ motif of Australia’s national airline signifies what many people regard as the pinnacle of kangaroo evolution—a large-bodied marsupial specialized for endurance-hopping. However, while almost all extant macropodoids (the crown group including kangaroos) use hopping gaits to some extent, the fossil record reveals that the locomotory capabilities of extinct macropodoids were comparatively diverse. The earliest recognized Oligocene–middle Miocene macropodoids probably employed quadrupedal bounding, climbing and slower speed hopping as their primary modes of locomotion. Yet, all were apparently small-bodied (20 kg) forms not appearing until the late Miocene coincident with increasing aridity and the spread of openly vegetated habitats. Hopping is functionally problematic at larger body sizes. Consequently, the later radiation of macropodids (kangaroos, wallabies and their relatives) achieved an optimal mass for efficient higher-speed hopping at ∼35 kg, with a theorized extreme limit of ∼140–160 kg. Modern kangaroos otherwise approach the peak mass range for such gaits at ∼50–90 kg, with the gigantic Pliocene–Pleistocene species of Protemnodon (‘giant wallabies’) at ∼100–160 kg likely being predominantly quadrupedal, and sthenurines (short-faced kangaroos) at ∼50–250 kg seemingly using bipedal striding. Here, we review the fossil evidence of macropodoid locomotion over the last ∼25 million years, and present preliminary analyses of limb bone and tarsal metric data. These indicate that the higher-speed endurance-hopping typical of modern large-bodied kangaroos was probably rare or absent in all but a few crown macropodoid lineages. The intrinsic gait variability of macropodoids has therefore diminished with Late Pleistocene megafaunal extinctions. As a result, the famous QANTAS ‘flying kangaroo’ actually depicts only one of what was once many successful locomotory strategies employed by macropodoids to conquer a range of terrestrial and arboreal habitats. Christine M. Janis [[email protected]], Bristol Palaeobiology Group, School of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK; Adrian M. O’Driscoll [[email protected]], Centre for Anatomical and Human Studies, Hull York Medical School, University of York, York YO1O 5DD, UK; Benjamin P. Kear [[email protected]], The Museum of Evolution, Uppsala University, Norbyvägen 16, Uppsala SE-75236, Sweden.</p
Worst Case Scenario and Stakeholder Group Decision: A 5-6 Meter Sea Level Rise in the Rhone Delta, France
No full textRisk policy and public attitudes appear disconnected from research predicting warmer climate partially due to human activity. To step out of this stalled situation, a worst case scenario of a 5-6m sea level rise (SLR) induced by the collapse of the WAIS and occurring during the period 2030-2130 is constructed and applied to the Rhone delta. Physical and socio-economic scenarios developed with data from the Rhone delta context are developed and submitted to stakeholders for a day-long workshop. Group process analysis shows a high level of trust and cooperation mobilized to face the 5-6m SLR issue, despite potentially diverging interests. Two sets of recommendations stem from the scenario workshop. A conservative "wait and see" option is decided when the risk of the WAIS collapse is announced in 2030. After WAIS collapse generates an effective 1m SLR rise by 2050, decisions are taken for total retreat and rendering of the Rhone delta to its hydrological function. The transposition of these results into present times policy decisions could be considered. The methodology developed here could be applied to other risk objects and situations, and serve for policy exercises and crisis prevention.Sea level rise, France, Camargue, scenario, extreme climate, stakeholder workshop
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