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Journal articles on the topic 'Diprotodon'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 January 2023

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1

Morris, Philip J. R., Philip G. Cox, and Samuel N. Cobb. "Mechanical significance of morphological variation in diprotodont incisors." Royal Society Open Science 6, no. 3 (March 2019): 181317. http://dx.doi.org/10.1098/rsos.181317.

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All rodents possess a single pair of enlarged incisors that grow throughout life. This condition (diprotodonty) is characteristic of Rodentia, but is also found in other mammals such as lagomorphs, hyraxes, the aye-aye and common wombat. This study surveyed lower incisor morphology across extant diprotodonts to examine shape variation within and between rodents and other diprotodonts, and to determine if tooth shape varies in a manner predictable from mechanics. Six linear and area variables were recorded from microCT scans of the mandibles of 33 diprotodont mammals. The curvature of the rodent lower incisors, as measured by the proportion of a circle it occupies, was shown to vary between 20 and 45%, with non-Glires taxa falling outside this range. Relative lengths of the portions of the incisor within and external to the mandible were not significantly correlated when the overall size was taken into account. Cross-sectional geometry of the incisor was significantly correlated with the external length of the incisor. Overall, incisor morphology was shown to vary in a way predictable from ecology and mechanics, in order to resist bending. Among non-rodents, lagomorph incisors closely resemble those of rodents, and, relative to rodents, hyrax and wombat incisors are somewhat smaller but aye-aye incisors are much more extreme in morphology.

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2

Case, J. A. "Differences in prey utilization by Pleistocene marsupial carnivores, Thylacoleo carnifex (Thylacoleonidae) and Thylacinus cynocephalus (Thylacinidae)." Australian Mammalogy 8, no. 1 (January 1, 1985): 45–52. http://dx.doi.org/10.1071/am85002.

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A case for the partitioning of prey items based upon both the body size of the predator and the prey can be made. Thylacoleo carnifex appears to have been selecting animals of large body size (though probably not Diprotodon) all of which were elements of the Australian Pleistocene megafauna. Thylacinus cynocephalus, on the other hand, seems to have been selecting animals of medium to small body size. This would suggest that the two Pleistocene marsupial carnivores, Thylacoleo carnifex and Thylacinus cynocephalus, could have coexisted within a single community because their dietary niches did not overlap.

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3

Gillespie, Richard, L. Keith Fifield, Vladimir Levchenko, and Rod Wells. "New 14C Ages on Cellulose from Diprotodon Gut Contents: Explorations in Oxidation Chemistry and Combustion." Radiocarbon 50, no. 1 (2008): 75–81. http://dx.doi.org/10.1017/s003382220004337x.

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We report radiocarbon ages on cellulose isolated from the gut contents of a Diprotodon found at Lake Callabonna, South Australia. The maximum age obtained corresponds to a minimum age of >53,400 BP for this extinct giant marsupial. This is older than, and hence consistent with, the generally accepted Australian megafauna extinction window. We argue that dichromate and other strong oxidants are less selective than chlorite for lignin destruction in wood, and our results suggest that ages approaching laboratory background can be obtained using a repeated pretreatment sequence of chlorite-alkali-acid and measurement of the sometimes discarded 330°C combustion fraction.

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4

LANGLEY, MICHELLE C. "Re‐analysis of the “engraved” Diprotodon tooth from Spring Creek, Victoria, Australia." Archaeology in Oceania 55, no. 1 (April 2020): 33–41. http://dx.doi.org/10.1002/arco.5209.

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5

Price, Gilbert J., Kathryn E. Fitzsimmons, Ai Duc Nguyen, Jian-xin Zhao, Yue-xing Feng, Ian H. Sobbe, Henk Godthelp, Michael Archer, and Suzanne J. Hand. "New ages of the world's largest-ever marsupial: Diprotodon optatum from Pleistocene Australia." Quaternary International 603 (November 2021): 64–73. http://dx.doi.org/10.1016/j.quaint.2021.06.013.

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6

PRICE, GILBERT J. "Taxonomy and palaeobiology of the largest-ever marsupial, Diprotodon Owen, 1838 (Diprotodontidae, Marsupialia)." Zoological Journal of the Linnean Society 153, no. 2 (June 2008): 369–97. http://dx.doi.org/10.1111/j.1096-3642.2008.00387.x.

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7

Price, Gilbert J., Kyle J. Ferguson, Gregory E. Webb, Yue-xing Feng, Pennilyn Higgins, Ai Duc Nguyen, Jian-xin Zhao, Renaud Joannes-Boyau, and Julien Louys. "Seasonal migration of marsupial megafauna in Pleistocene Sahul (Australia–New Guinea)." Proceedings of the Royal Society B: Biological Sciences 284, no. 1863 (September 27, 2017): 20170785. http://dx.doi.org/10.1098/rspb.2017.0785.

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Seasonal two-way migration is an ecological phenomenon observed in a wide range of large-bodied placental mammals, but is conspicuously absent in all modern marsupials. Most extant marsupials are typically smaller in body size in comparison to their migratory placental cousins, possibly limiting their potential to undertake long-distance seasonal migrations. But what about earlier, now-extinct giant marsupial megafauna? Here we present new geochemical analyses which show that the largest of the extinct marsupial herbivores, the enormous wombat-like Diprotodon optatum , undertook seasonal, two-way latitudinal migration in eastern Sahul (Pleistocene Australia–New Guinea). Our data infer that this giant marsupial had the potential to perform round-trip journeys of as much as 200 km annually, which is reminiscent of modern East African mammal migrations. These findings provide, to our knowledge, the first evidence for repetitive seasonal migration in any metatherian (including marsupials), living or extinct, and point to an ecological phenomenon absent from the continent since the Late Pleistocene.

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8

Asten, Michael W., Sanja van Huet, and Divya Nidhi Srivastava. "Tracking the Diprotodon - microtremor passive seismic profiling as a tool for location of megafauna bone beds." ASEG Extended Abstracts 2018, no. 1 (December 2018): 1–7. http://dx.doi.org/10.1071/aseg2018abm1_1h.

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9

Menzies, J., H. L. Davies, W. J. Dunlap, and S. D. Golding. "A possible early age for a diprotodon (Marsupialia: Diprotodontidae) fossil from the Papua New Guinea highlands." Alcheringa: An Australasian Journal of Palaeontology 32, no. 2 (June 2008): 129–47. http://dx.doi.org/10.1080/03115510801921895.

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10

Gröcke, Darren R. "Distribution of C3 and C4 Plants in the Late Pleistocene of South Australia Recorded by Isotope Biogeochemistry of Collagen in Megafauna." Australian Journal of Botany 45, no. 3 (1997): 607. http://dx.doi.org/10.1071/bt96040.

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Stable carbon-isotope analyses (expressed as a 13C:12C ratio relative to that of a standard: δ13C) on fossilised collagenic material in megafaunal bones can provide information regarding the palaeodiet (e.g. C3 and/or C4 plants) of these animals. Isotope analyses were performed on collagenic material extracted from bones of Sthenurus spp., Diprotodon spp. and Macropus spp. from Cooper Creek, Henschke Cave, Baldina Creek, Dempsey’s Lake and Rocky River in South Australia. The percentage of trees and shrubs estimated from palaeofloral records in south-eastern Australia and the dietary preferences of megafauna were found to be positively correlated. The dietary preferences of megafauna analysed from South Australian localities indicate that megafauna were opportunistic and changed their diet in response to environmental change. This suggests that megafauna diet can not be founded on dental morphology alone. Fossilised collagenic material in vertebrate remains can provide an insight into the broadscale nature of the vegetation. This approach is a good compliment for other palaeoecological data (e.g. sedimentology, spore–pollen, diatoms) by providing evidence for past climates in relation to the proportion of C3 and C4 plants.

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11

Sharp, Alana C., and Thomas H. Rich. "Cranial biomechanics, bite force and function of the endocranial sinuses in Diprotodon optatum , the largest known marsupial." Journal of Anatomy 228, no. 6 (March 3, 2016): 984–95. http://dx.doi.org/10.1111/joa.12456.

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12

Wroe, S., T. J. Myers, R. T. Wells, and A. Gillespie. "Estimating the weight of the Pleistocene marsupial lion, Thylacoleo carnifex (Thylacoleonidae:Marsupialia): implications for the ecomorphology of a marsupial super-predator and hypotheses of impoverishment of Australian marsupial carnivore faunas." Australian Journal of Zoology 47, no. 5 (1999): 489. http://dx.doi.org/10.1071/zo99006.

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Using demonstrated relationships between body mass and humeral and femoral circumferences, we calculate the weight of the only specimen of Thylacoleo carnifex known from a near-complete skeleton. Body weights of 112–143 kg were estimated for this individual, from Moree, north-western New South Wales. Extrapolating on the basis of geometric similtude, we further estimated the weight of the largest T. carnifex for which we had cranial data at 128–164 kg. Moreover, estimates for at least three of the thirteen available specimens exceeded 124–160 kg, suggesting that individuals of this size were common. Our estimates of average weight for the species range from 101 to 130 kg. These results clearly show that Pleistocene Australia had a 'large' cat equivalent and that 'large' terrestrial predator niches were not then occupied exclusively by reptiles.They may also diminish the argument that soil-nutrient deficiency constrained the evolution of large mammalian carnivores on this continent in the Pleistocene. Similarly, we posit that prima facie evidence for reptilian domination of terrestrial carnivore niches during the Miocene is wanting, although it is conceded that far more detailed investigation is required to comprehensively test these hypotheses. Earlier studies have drawn parallels between T. carnifex and sabre-toothed predators, thought to have specialised in hunting particularly large and powerful prey. Taken in the context of upwardly revised weight estimates, we argue that Pleistocene marsupial lions may have dispatched even Diprotodon-sized animals. But again, more comprehensive study, including thorough biomechanical design analysis of the post-cranial skeleton in particular, will be required to thoroughly illuminate the predatory habitus and general ecology of Australia's largest and most specialised marsupial carnivore.

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13

Sanderson, Ken J., John E. Nelson, David P. Crewther, Sheila Gillard Crewther, and Vicki E. Hammond. "Retinogeniculate Patterns in Diprotodont Marsupials." Brain, Behavior and Evolution 30, no. 1-2 (1987): 22–42. http://dx.doi.org/10.1159/000118636.

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14

DANN, J. F. "Dopaminergic amacrine cells in the retina of the possum, Trichosurus vulpecula." Visual Neuroscience 15, no. 4 (April 1998): 701–9. http://dx.doi.org/10.1017/s095252389815410x.

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The common brush-tailed possum Trichosurus vulpecula is a small diprotodont marsupial common to both urban and natural environments. This is the first analysis of the neurotransmitter content of its retinal cells and, as the possum is a nocturnal forager, it was appropriate to begin with the dopaminergic amacrine cells that form an essential link in the modulation of the rod pathways subserving nocturnal vision. These results were compared with those from another diprotodont, the marsupial wallaby or quokka (Dann, 1996) to establish whether the dopaminergic systems were similar between these two diprotodont marsupials and also to compare these findings with those of other mammals. This study describes a population of amacrine cells in the possum retina that were immunolabelled with an antibody raised against tyrosine hydroxylase (TH). These TH-immunoreactive (IR) cells were located within the inner nuclear layer (INL) and their dendrites predominantly ramified within the most sclerad layers of the inner plexiform layer (IPL). The TH-IR amacrines formed a sparse cell population, of around 2400 cells, distributed over the entire retina. There was little evidence of a concentration gradient except for a slight elevation in density in the naso-temporal axis in dorsal retina. The formation of rings within the dendritic plexus, a feature common to TH-IR cells in other species, was also present in the possum and these appeared relatively frequently. This latter finding was rather unexpected since, in the marsupial quokka (Dann, 1996), the TH-IR dendrites formed fewer rings despite having the same density of TH-IR amacrines as the possum. This suggests that there may be subtle differences in the way the rod pathways are interconnected even within the same marsupial group and may also be a reflection of relative rod dominance across species.

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15

Richardson, S. J., A. J. Bradley, W. Duan, R. E. Wettenhall, P. J. Harms, J. J. Babon, B. R. Southwell, S. Nicol, S. C. Donnellan, and G. Schreiber. "Evolution of marsupial and other vertebrate thyroxine-binding plasma proteins." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 266, no. 4 (April 1, 1994): R1359—R1370. http://dx.doi.org/10.1152/ajpregu.1994.266.4.r1359.

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Binding of radioactive thyroxine to proteins in the plasma of vertebrates was studied by electrophoresis followed by autoradiography. Albumin was found to be a thyroxine carrier in the blood of all studied fish, amphibians, reptiles, monotremes, marsupials, eutherians (placental mammals), and birds. Thyroxine binding to transthyretin was detected in the blood of eutherians, diprotodont marsupials, and birds, but not in blood from fish, toads, reptiles, monotremes, and Australian polyprotodont marsupials. Globulins binding thyroxine were only observed in the plasma of some mammals. Apparently, albumin is the phylogenetically oldest thyroxine carrier in vertebrate blood. Transthyretin gene expression in the liver developed in parallel, and independently, in the evolutionary lineages leading to eutherians, to diprotodont marsupials, and to birds. In contrast, high transthyretin mRNA levels, strong synthesis, and secretion of transthyretin in choroid plexus from reptiles and birds indicate that transthyretin gene expression in the choroid plexus evolved much earlier than in the liver, probably at the stage of the stem reptiles. NH2-terminal sequence analysis suggests a change of transthyretin pre-mRNA splicing during evolution.

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16

Rapisarda, E., F. Amorini, L. Calabretta, G. Cardella, M. De Napoli, G. Raciti, and C. Sfienti. "18Ne diproton decay." European Physical Journal Special Topics 150, no. 1 (November 2007): 169–72. http://dx.doi.org/10.1140/epjst/e2007-00295-3.

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17

Lönnberg, Einar. "On some remarkable Digestive Adaptations in Diprotodont Marsupials." Proceedings of the Zoological Society of London 72, no. 1 (July 7, 2010): 12–31. http://dx.doi.org/10.1111/j.1469-7998.1902.tb08201.x.

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18

Piasetzky, E., D. Ashery, M. A. Moinester, G. A. Miller, and A. Gal. "Pion Absorption on the Diproton." Physical Review Letters 57, no. 17 (October 27, 1986): 2135–38. http://dx.doi.org/10.1103/physrevlett.57.2135.

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19

Niskanen, J. A. "π−absorption on the diproton inHe3." Physical Review C 43, no. 1 (January 1, 1991): 36–49. http://dx.doi.org/10.1103/physrevc.43.36.

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20

SHARMAN, G. B. "THE EMBRYONIC MEMBRANES AND PLACENTATION IN FIVE GENERA OF DIPROTODONT MARSUPIALS." Proceedings of the Zoological Society of London 137, no. 2 (August 20, 2009): 197–220. http://dx.doi.org/10.1111/j.1469-7998.1961.tb05899.x.

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21

Vigdor, S. E., W. W. Jacobs, and E. Korkmaz. "Comment on ‘‘Pion absorption on the diproton’’." Physical Review Letters 58, no. 8 (February 23, 1987): 840. http://dx.doi.org/10.1103/physrevlett.58.840.

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22

Shklyarevsky, G. M. "The inelastic diproton resonances; K-matrix analysis." Journal of Physics G: Nuclear and Particle Physics 17, no. 1 (January 1, 1991): 85–92. http://dx.doi.org/10.1088/0954-3899/17/1/007.

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23

Freedman, Leonard, and Lance T. Twomey. "Relative growth rates of limb muscles in the diprotodont marsupial, Setonix brachyurus." Journal of Zoology 188, no. 2 (August 20, 2009): 161–71. http://dx.doi.org/10.1111/j.1469-7998.1979.tb03398.x.

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24

Yamasaki, Masahiro. "Comparative anatomical studies on the thyroid and thymic arteries. VI. Diprotodont marsupials." Anatomical Science International 91, no. 3 (October 15, 2015): 258–73. http://dx.doi.org/10.1007/s12565-015-0293-y.

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25

Ward, SJ. "Life-History of the Feathertail Glider, Acrobates-Pygmaeus (Acrobatidae, Marsupialia) in South-Eastern Australia." Australian Journal of Zoology 38, no. 5 (1990): 503. http://dx.doi.org/10.1071/zo9900503.

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Acrobates pygmaeus was captured in nestboxes in three areas of central and southern Victoria: the Gembrook-Cockatoo area and Nar Nar Goon North east of Melbourne, and Daylesford north-west of Melbourne. Breeding was strictly seasonal and females produced two litters between July and February each year. Males also showed seasonal fluctuation in testes sizes. Mean litter size was 3.5 at birth and 2.5 at weaning. Pouch life lasted 65 days and young were weaned at approximately 100 days of age. Growth was slow and maternal investment in each young was high, and continued after weaning. Most individuals matured in the season following their birth, but some males did not mature until the second season after their birth. Maximum field longevity was at least three years. Comparisons are made with other small diprotodont marsupials.

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26

Gal, A. "Amplitude ambiguities in pion absorption on the diproton." Few-Body Systems 9, no. 2-3 (1990): 89–96. http://dx.doi.org/10.1007/bf01091700.

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27

Dymov, S. "Physics with diproton ﬁnal states at ANKE-COSY." EPJ Web of Conferences 3 (2010): 05016. http://dx.doi.org/10.1051/epjconf/20100305016.

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28

Kadenko, I. M., B. M. Bondar, O. M. Gorbachenko, and N. V. Sakhno. "Bound Diproton: An ``Illusive'' Particle or Exotic Nucleus?" Acta Physica Polonica A 142, no. 3 (September 2022): 337–41. http://dx.doi.org/10.12693/aphyspola.142.337.

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29

Ward, Simon J. "Numbers of Teats and Pre- and Post-Natal Litter Sizes in Small Diprotodont Marsupials." Journal of Mammalogy 79, no. 3 (August 1998): 999. http://dx.doi.org/10.2307/1383108.

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30

Charvet, Christine J., Cheryl D. Stimpson, Young Do Kim, Mary Ann Raghanti, Albert H. Lewandowski, Patrick R. Hof, Aida Gómez-Robles, Fenna M. Krienen, and Chet C. Sherwood. "Gradients in cytoarchitectural landscapes of the isocortex: Diprotodont marsupials in comparison to eutherian mammals." Journal of Comparative Neurology 525, no. 8 (March 10, 2017): 1811–26. http://dx.doi.org/10.1002/cne.24160.

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31

DYMOV, SERGEY. "HADRON PHYSICS WITH DIPROTON FINAL STATES AT ANKE-COSY." International Journal of Modern Physics A 24, no. 02n03 (January 30, 2009): 521–25. http://dx.doi.org/10.1142/s0217751x09043985.

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The possibility to select reliably the diproton final state with small excitation energy with the ANKE spectrometer at COSY-Juelich provides a new tool to study hadron interactions at intermediate energies. In this case the final proton pairs are found presumably in the 1S0 state which simplifies significantly the theoretical analysis. This approach has been successfully applied to the reactions pd → {pp}sn at high and low momentum transfer kinematics, as well as to the pp → {pp}sπ0 and pp → {pp}sγ processes.

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32

ARBUZOV, B. A., S. A. SHICHANIN, E. E. BOOS, and V. I. SAVRIN. "ON A POSSIBLE CORRESPONDENCE OF THE NEW NARROW RESONANCES IN CHARGED PARTICLE SYSTEMS TO THE RELATIVISTIC COULOMB LEVELS IN CONTINUUM." Modern Physics Letters A 05, no. 18 (July 30, 1990): 1441–49. http://dx.doi.org/10.1142/s0217732390001633.

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In the paper the existence of new quasi-stationary levels in the relativistic Coulomb problem is predicted and their positions are calculated on the basis of the numerical solution of the quasi-potential equation. The results obtained are used for interpretation of the narrow electron-positron resonances revealed in heavy ions collisions and of the diproton resonances observed in neutron-proton interactions. The close relationship of the observed states with the von Neumann-Wigner levels embedded in the continuum, is indicated.

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33

Baimurzinova, B. "Analyzing power of Inverse Diproton Photodisintegration at Intermediate Energies." Physical Sciences and Technology 3, no. 1 (2016): 82–84. http://dx.doi.org/10.26577/phst-2016-1-97.

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34

Brown, B. Alex. "Diproton decay of nuclei on the proton drip line." Physical Review C 43, no. 4 (April 1, 1991): R1513—R1517. http://dx.doi.org/10.1103/physrevc.43.r1513.

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35

Dymov, Sergey. "Near-threshold pion production in diproton reactions at ANKE." Journal of Physics: Conference Series 295 (May 1, 2011): 012095. http://dx.doi.org/10.1088/1742-6596/295/1/012095.

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36

Grigorenko, L. V., R. C. Johnson, I. G. Mukha, I. J. Thompson, and M. V. Zhukov. "Two-proton or diproton emission: 19Mg and 48Ni examples." Nuclear Physics A 689, no. 1-2 (June 2001): 567–70. http://dx.doi.org/10.1016/s0375-9474(01)00906-x.

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37

Bradford, R. A. W. "The effect of hypothetical diproton stability on the universe." Journal of Astrophysics and Astronomy 30, no. 2 (June 2009): 119–31. http://dx.doi.org/10.1007/s12036-009-0005-x.

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38

HAGINO, K., H. SAGAWA, and T. OISHI. "DINEUTRON CORRELATION IN THE GROUND STATE AND E1 EXCITATIONS OF BORROMEAN NUCLEI." Modern Physics Letters A 25, no. 21n23 (July 30, 2010): 1842–45. http://dx.doi.org/10.1142/s0217732310000459.

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Using a three-body model with density-dependent contact interaction, we discuss the role of dineutron correlation in the ground state properties as well as in the dipole excitation of typical weakly-bound Borromean nuclei, 11 Li and 6 He . We show that, while both the nuclei manifest themselves similar strong dineutron correlations to each other in the ground state, the energy distributions for the two emitted neutrons from the dipole excitation are considerably different. We also discuss briefly the diproton correlation in a proton-rich Borromean nucleus, 17 Ne .

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39

Abbie, A. A. "ADAPTATION PECTJTJAB TO SOME DIPBOTODONT MABSUPIALS: 15. A Masticatory Adaptation peculiar to some Diprotodont Marsupials." Proceedings of the Zoological Society of London B109, no. 2 (August 21, 2009): 261–79. http://dx.doi.org/10.1111/j.1096-3642.1939.tb00716.x.

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40

Brown, B. Alex. "Erratum: Diproton decay of nuclei on the proton drip line." Physical Review C 44, no. 2 (August 1, 1991): 924. http://dx.doi.org/10.1103/physrevc.44.924.

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41

Cole, B. J. "Systematics of proton and diproton separation energies for light nuclei." Physical Review C 56, no. 4 (October 1, 1997): 1866–71. http://dx.doi.org/10.1103/physrevc.56.1866.

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42

Zucić, D., and N. Simicević. "Calculation of differential Cross Section for pion absorption on diproton." Few-Body Systems 8, no. 3 (September 1990): 95–104. http://dx.doi.org/10.1007/bf01078063.

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43

Kurbatov, Vladimir, Dmitry Tsirkov, Vladimir Komarov, Bota Baimurzinova, Ainur Kunsafina, and Zhanibek Kurmanaliev. "Observation of resonance-like behavior of the pp → {pp}sπ0 reaction around √s = 2.65 GeV." EPJ Web of Conferences 204 (2019): 08008. http://dx.doi.org/10.1051/epjconf/201920408008.

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The pp → {pp}sπ0 reaction, where {pp}s denotes a diproton, i.e. an unbound interacting proton pair in the 1S0 state, has been studied in order to obtain the forward differential cross section dσ/dΩ at 11 energy values in the region of 0.8–2.8 GeV. A resonance-like peak with the energy E0 = 2.647 ± 0.005 GeV and the width Γ = 0.26 ± 0.03 GeV has been observed in the energy dependence of the differential cross section dσ/dΩ at zero angle. The slope of the angular dependence for the energies in the peak region is different compared with the energies around it. Possible implications on this phenomenon are discussed.

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44

Murray, JD, SC Donnellan, GM Mckay, RH Rofe, PR Baverstock, DL Hayman, and M. Gelder. "The Chromosomes of 4 Genera of Possums From the Family Petauridae (Marsupialia, Diprotodonta)." Australian Journal of Zoology 38, no. 1 (1990): 33. http://dx.doi.org/10.1071/zo9900033.

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The standard and C-banded (four species) karyotypes of six species of the family Petauridae (Gymnobelideus leadbeateri, Petaurus australis, P. breviceps, P. norfolcensis, Dactylopsila trivirgata and Dactylonax palpator) are described. The G-banded karyotype of P. norfolcensis is also described. Gymnobelideus and Petaurus have diploid chromosome number of 22. All three species of Petaurus have a similar karyotype, consisting of biarmed autosomes and very small sex chromosomes, which differs from Gymnobelideus by a minimum of one chromosomal rearrangement of each autosome. Dactylopsila and Dactylonax have similar karyotypes with diploid chromosome numbers of 18. The relationship of these two genera to Petaurus is still uncertain but all members of this family differ from Pseudocheiridae in the small size of the sex chromosomes.

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45

Richardson, Samantha J., Adrian J. Bradley, Wei Duan, Bridget R. Southwell, Lynne Selwood, and Gerhard Schreiber. "The Expression of the Transthyretin Gene in Liver Evolved during the Radiation of Diprotodont Marsupials in Australia." General and Comparative Endocrinology 90, no. 2 (May 1993): 177–82. http://dx.doi.org/10.1006/gcen.1993.1072.

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Barnes, Luke A. "Binding the diproton in stars: anthropic limits on the strength of gravity." Journal of Cosmology and Astroparticle Physics 2015, no. 12 (December 29, 2015): 050. http://dx.doi.org/10.1088/1475-7516/2015/12/050.

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Ying-ji, Zhang, Yang Jin-qing, Zhang Jie, and He Jian-hua. "Resonant diproton spectrum measured using the reactionH2(d,2p)2nat 15.7 MeV." Physical Review C 45, no. 2 (February 1, 1992): 528–31. http://dx.doi.org/10.1103/physrevc.45.528.

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DYMOV, S. "DIPROTON FINAL STATES: A NEW TOOL FOR HADRON PHYSICS AT ANKE-COSY." International Journal of Modern Physics E 18, no. 02 (February 2009): 248–52. http://dx.doi.org/10.1142/s0218301309012264.

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The ANKE spectrometer at COSY-Juelich provides the possibility to select proton pairs with small excitation energy in the final state. This opens a new way to study hadron interactions at intermediate energies. The final proton pairs with small excitation energy are found presumably in the 1S0 state which simplifies significantly the theoretical analysis. This approach has been successfully applied to the reactions pd → {pp}sn at high and low momentum transfer kinematics, as well as to the pp → {pp}sπ0 and pp → {pp}sγ processes.

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Kurbatov, V., M. Büscher, S. Dymov, D. Gusev, M. Hartmann, A. Kacharava, A. Khoukaz, et al. "Energy dependence of forward 1S0 diproton production in the pp→ppπ0 reaction." Physics Letters B 661, no. 1 (March 2008): 22–27. http://dx.doi.org/10.1016/j.physletb.2008.01.051.

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RACITI, G., M. DE NAPOLI, E. RAPISARDA, G. CARDELLA, F. GIACOPPO, and C. SFIENTI. "2He DECAY FROM EXCITED STATES: THE 18Ne CASE." International Journal of Modern Physics E 20, no. 04 (April 2011): 976–79. http://dx.doi.org/10.1142/s021830131101909x.

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Two-proton radioactivity studies have been performed on excited states of 18 Ne produced by 20 Ne fragmentation at the FRIBs facility of the Laboratori Nazionali del Sud. The study of the relative-momentum correlations of the two protons allowed to disentangle the diproton, democratic and sequential decay contributions to the 2p emission. In order to extend the study on two-proton decay to other light-masses nuclei, an upgrade of the FRIBs facility is planned. A new configuration of the Fragment Separator would be able to increase the acceptance of the beam line and therefore the yield of the produced radioactive beams. Also the present tagging setup will be modified in view of the gain intensity, in order to sustain the higher foreseen incoming rate. Status and perspectives of the facility will be presented.

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