4,431 research outputs found
Award winning author, journalist Daniel L. Coberly to Speak
No full textTollefson, Elizabeth. (2018). Award winning author, journalist Daniel L. Coberly to Speak. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/224033
Report on Meteorological Research March 1, 1935 (m-1)
No full textThe object of the report was to elucidate in detail the various features of the research program in meteorology being carried on at the Daniel Guggenheim Airship Institute in Akron, Ohio. Mr. L. J. Fangman, of the U.S. Weather Bureau, was collaborating with the author in carrying out work such as a study of autographic records of the various meteorological elements during frontal passages with a view to the possible prediction of the intensity of the accompanying disturbance as it may affect the operation of aircraft and a study of atmospheric gustiness with a view to finding the dependence between frequency end amplitude of velocity fluctuations and the vertical temperature and velocity gradients
Evolution of Endosymbiosis in (xylotrophic) Wood-Eating Bivalves
No full textA grant has been awarded to Dr. Daniel L. Distel of the University of Maine to investigate the evolution of wood-boring clams. Though not well known to the general public, wood-boring clams are destructive species that may be considered the marine equivalent of termites. They include many diverse species that cause more than a billion dollars in damage to wooden structures, boats, and fishing gear annually in marine environments worldwide. The most destructive of these are the shipworms ; worm-like clams that burrow into and eat wood. These voracious wood eaters can destroy a twelve-inch diameter pier piling in less than one year\u27s time. Though they look like worms, molecular evidence suggests that they are closely related to the common steamer clam , a staple of New England cuisine. The purpose of this investigation is to use molecular data from several genes to reveal the evolutionary relationships of wood boring clams to other more common bivalves and to use these data to better understand how their destructive habits have evolved, including the role of associated bacteria.Although wood can be treated with broad-spectrum chemical biocides to control wood-borer damage, use of the most effective treatments has recently been restricted or banned in many states and nations due to environmental concerns. New environmentally sound control methods are critically needed, particularly in low-income coastal communities where wood is the only affordable marine construction material. Such control measures must be targeted specifically to wood-boring species to minimize ecological impact. Evolutionary studies will tell us how these nuisance species developed the ability to destroy wood and what makes them different from other more desirable and economically important marine species. This knowledge will be essential for developing control methods that are safe and highly specific to these destructive organisms
FIGURE 1. A in Description of two new genera and two new species of antipatharian corals in the family Aphanipathidae (Cnidaria: Anthozoa: Antipatharia)
No full textFIGURE 1. A maximum likelihood-based phylogenetic tree of the family Aphanipathidae based on mitochondrial nad5-IGRnad1 sequence data (Chery et al. 2018). The original tree consisted of 112 taxa and 682 sites and was rooted internally with the Leiopathidae. PhyML used the GTR+G model of sequence evolution and 1,000 bootstrap replicates.Published as part of Opresko, Dennis M., Bo, Marzia, Stein, David P., Evankow, Ann, Distel, Daniel L. & Brugler, Mercer R., 2021, Description of two new genera and two new species of antipatharian corals in the family Aphanipathidae (Cnidaria: Anthozoa: Antipatharia), pp. 161-174 in Zootaxa 4966 (2) on page 163, DOI: 10.11646/zootaxa.4966.2.4, http://zenodo.org/record/473644
Aphanostichopathes Opresko & Bo & Stein & Evankow & Distel & Brugler 2021, gen. nov.
No full textGenus Aphanostichopathes gen. nov. Bo & Opresko Cirripathes, Brook 1889 (in part) Stichopathes, Opresko & Genin 1990; Bo et al. 2009 (in part); Bo et al. 2012 (in part); Brugler et al. 2013 (in part); MacIsaac et al. 2013 (in part); Chery et al. 2018 (in part) Diagnosis. Colonies unbranched. Stem straight or curved and often forming wide distal coils. Spines usually conical, acute or blunt, with conical tubercles on their surface most often confined to near the apex. Polyps up to 3.4 mm in transverse diameter, and arranged in a single series. Type species. Cirripathes paucispina Brook, 1889 (= Cirrhipathes paucispina Brook). Remarks. In outward appearance Aphanostichopathes very closely resembles the genus Stichopathes in the family Antipathidae. The distinct tuberculate nature of the skeletal spines, the apparent aphanipathid like appearance of the polyps, and the molecular data as discussed below, confirm its relationship to the Aphanipathidae. Species in genus. Stichopathes euoplos Schultze, 1903; Stichopathes dissimilis Roule, 1902, 1905; and Stichopathes spiessi Opresko and Genin, 1990. One other species that might belong to the new genus is Stichopathes flagellum Roule, 1902, 1905; however, the type specimen needs to be re-examined for the presence of tubercles on the spines. Phylogenetic data. The type specimen of Aphanostichopathes paucispina (Brook) has not been evaluated in DNA sequencing studies. However, two specimens identified as Stichopathes spiessi Opresko & Genin, a species which is morphologically very similar, and may be identical to A. paucispina, were analyzed by Chery et al. (2018) using the mitochondrial gene regions nad5- IGR- nad1 and cox3-cox1. The resulting phylogenetic tree of the families Antipathidae and Aphanipathidae based on cox3-cox1 is shown in Figure 5. The genera Aphanipathes, Phanopathes, Anozopathes and Acanthopathes shown in Figure 5 are all currently placed in the family Aphanipathidae. Aphanostichopathes clearly falls within the same clade and all typically have spines with conical tubercles. In contrast, species of Stichopathes that remain within the Antipathidae have spines that are smooth or have small round or oblong papillae, rather than conical tubercles. The specimen of Stichopathes cf. occidentalis in the Antipathidae clade in the Figure 5 (SED8045) was not available for examination; however, assuming it has spines that are similar to S. occidentalis Gray, then the spines should have numerous small roundish papillae typical of some species of Stichopathes in the family Antipathidae. Note: the species identified as Stichopathes cf. flagellum in Figure 5 has faint morphological features indicating that it might also belong in the family Aphanipathidae; however, the fact that it groups separate from the two species of Aphanostichopathes requires further study.Published as part of Opresko, Dennis M., Bo, Marzia, Stein, David P., Evankow, Ann, Distel, Daniel L. & Brugler, Mercer R., 2021, Description of two new genera and two new species of antipatharian corals in the family Aphanipathidae (Cnidaria: Anthozoa: Antipatharia), pp. 161-174 in Zootaxa 4966 (2) on pages 167-169, DOI: 10.11646/zootaxa.4966.2.4, http://zenodo.org/record/473644
Characterization of chemoautotrophic bacterial symbionts in a gutless marine worm (Oligochaeta, Annelida) by phylogenetic 16S rRNA sequence analysis and in situ hybridization
No full textCharacterization of chemoautotrophic bacterial symbionts in a gutless marine worm (Oligochaeta, Annelida) by phylogenetic 16S rRNA sequence analysis and in situ hybridization (Article begins on next page) The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters. Citation Dubilier, N., O. Giere, D. L. Distel, and Colleen M. Cavanaugh.1995. "Characterization of chemoautotrophic bacterial symbionts in a gutless marine worm (Oligochaeta, Annelida) by phylogenetic 16S rRNA sequence analysis and in situ hybridization. " Applie
Nebraska Lawyer
No full textDerived from the similarly-titled Creighton Law Review article by this author (39 Creighton L. Rev. 29 (2005)), this article focuses on a discussion of techniques for more effective appellate advocacy, including more effective written advocacy (brief writing) and more effective oral advocacy (oral arguments).5-1
Anozopathes Opresko & Bo & Stein & Evankow & Distel & Brugler 2021, gen. nov.
No full textGenus <i>Anozopathes</i> gen. nov. Opresko & Bo <p> <b>Diagnosis.</b> Colonies relatively small, generally not more than about 25 cm tall, very sparsely branched usually only to the second order, but possibly up to the fourth order, with long branches disposed on all sides of the stem and lower-order branches. Branch angles usually very wide, 90º or greater. Spines conical in lateral view, laterally compressed, acute; with scattered tubercles on their surface, usually near the apex. Tubercles predominantly on the polypar spines, Polyps up to 3.6 mm in transverse diameter, and arranged in a single row.</p> <p> <b>Type species</b>. <i>Anozopathes hawaiiensis</i> <b>sp. nov.</b></p> <p> <b>Remarks.</b> A sample of the holotype of the type species, <i>Anozopathes hawaiiensis</i> <b>sp. nov</b>., as well as the holotype of <i>Anozopathes palauensis</i> <b>sp. nov.</b> (see below) were included in a DNA sequencing study using mitochondrial <i>nad5</i> -IGR- <i>nad1</i> (Chery <i>et al.</i> 2018; digital poster presentation available upon request to MRB) and the results showed that both species grouped within the family Aphanipathidae (Fig. 1). On the basis of the growth form of the corallum, the genus is intermediate between densely branched morphotypes in the genus <i>Aphanipathes</i> and the new aphanipathid genus <i>Aphanostichopathes</i> (see below) comprised of species previously assigned to the genus <i>Stichopathes,</i> and represented by <i>Aphanostichopathes</i> cf. <i>dissimilis</i> Roule, 1902, 1905, in Figure 1 (Note: <i>Aphanostichopathes</i> cf. <i>dissimilis</i> was originally presented in Chery <i>et al</i>. as <i>Stichopathes dissimilis</i>; however, examination of the SEMs of the spines of the type specimen of <i>S</i>. <i>dissimilis</i> indicate that it may not be conspecific with Roule’s species). Based on K2P genetic distance estimates for <i>nad5</i> -IGR- <i>nad1</i>, the two species of <i>Anozopathes</i> are genetically much closer to the <i>Aphanostichopathes</i> cf. <i>dissimilis</i> (with genetic distances of 0.0021 –0.0044) than to the <i>Aphanipathes / Phanopathes</i> clade (genetic distances 0.1736 –0.1966) in Figure 1. Both <i>Anozopathes</i> species are genetically identical using the <i>nad5</i> -IGR- <i>nad1</i> region; however, this gene region does not have the same power to resolve species as the <i>cox3</i> -IGR- <i>cox1</i> region (which was not successfully sequenced). Note: the species identified as <i>Stichopathes</i> cf. <i>flagellum</i> in Fig. 1 has faint morphological features indicating that it might also belong in the family Aphanipathidae; however, the fact that it groups with a morphologically unrelated aphanipathid genus, <i>Acanthopathes</i>, requires further study.</p> <p> Several previously described genera were also based on species forming sparsely branched colonies. Brook (1889) created the genus <i>Pteropathes</i> for a branched species (<i>P</i>. <i>fragilis</i> <i>;</i> holotype NHMUK 90.4.9.9) with long straight branches, many of which have a very narrow distal branch angle. In addition, some of the branches (up to five in a row) are arranged uniserially. Based on Brook’s illustration, the polypar spines are estimated to be up to 0.54 mm tall and appear to be smooth, without tubercles. The polyps are arranged in a single row, and are 2–3 mm in transverse diameter (4–5 per cm with very little coenenchyme between adjacent ones). The uniserial branching and the narrow distal branch angles suggest that <i>Pteropathes</i> might be related to species of <i>Antipathes</i> or <i>Aphanipathes</i>. The very large spines are more typical of some species of <i>Aphanipathes</i>. The spines need to be re-examined more closely with an SEM to determine if there is evidence of tubercles.</p> <p> Van Pesch (1914) created the genus <i>Hillopathes</i> for a species (<i>H. ramosa</i>) with very sparse branching that he had first thought was a species of <i>Cirrhipathes</i> (van Pesch, 1910). As in <i>Cirrhipathes</i>, the polyps in <i>H. ramosa</i> are not arranged uniserially, but are crowded together on one side of the axis giving the appearance that they are in multiple rows. Van Pesch (1914) considered the presence of branches to be a generic level character. The spines in <i>H. ramosa</i> were reported to be up to 0.39 mm in height, and van Pesch thought that this might suggest a relationship to <i>Aphanipathes</i>; however, the spines were described by van Pesch (1914) as being smooth. The absence of tubercles on the spines does not preclude the genus from being related to the family Aphanipathidae; however, the non-uniserial arrangement of the polyps would support the conclusion that <i>Hillopathes</i> is not related to <i>Anozopathes.</i> Also, it is quite possible that the specimens of <i>Hillopathes</i> that van Pesch described were actually specimens of <i>Cirrhipathes</i> that had been broken off at the growing tip and then underwent regeneration producing several separate growing tips. Breakage of the apical portions of black coral whips by strong currents is known to be a common occurrence on the reefs of Indonesia (Bo <i>et al</i>. 2009).</p> <p> <b>Etymology.</b> The genus name is derived from the Greek <i>“anozos”</i> meaning few or no branches, and the commonly used suffix “ <i>pathes</i> ”.</p>Published as part of <i>Opresko, Dennis M., Bo, Marzia, Stein, David P., Evankow, Ann, Distel, Daniel L. & Brugler, Mercer R., 2021, Description of two new genera and two new species of antipatharian corals in the family Aphanipathidae (Cnidaria: Anthozoa: Antipatharia), pp. 161-174 in Zootaxa 4966 (2)</i> on pages 162-164, DOI: 10.11646/zootaxa.4966.2.4, <a href="http://zenodo.org/record/4736449">http://zenodo.org/record/4736449</a>
Method of thermally glazing an article, U.S. Patent 6,127,005
No full textCoating and filler materials for localized thermal processing of glazed ceramics and other brittle and low thermal conductivity materials. The coating materials include oxide compositions that exhibit coefficients of thermal expansion which are less than about 8×10-6 /° C. and glass transition temperatures which are less than about 400° C. The filler materials include particulate oxide materials which do not substantially react during localized thermal processing of glazed ceramics and other brittle and low thermal conductivity materials. The coating and filler materials are useable together as a composite material for repairing cavities having depths greater than about 2 mm
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