8,261 research outputs found
From olefin metathesis to organoruthenium homogeneous catalysis : synthesis, applications and mechanistic understanding
No full textOlefin metathesis is a valuable synthetic tool, widely used in several fields of science. Due to the importance of this transformation several contributions have been made in this field in order to understand mechanistic aspects, reactivity and applicability of this process.
In this topic, ruthenium indenylidene complexes have shown great activity and stability in metathesis, making them very valuable pre-catalysts. However, several aspects of these pre-catalysts have not been evaluated yet. For example, even though reports of active second generation ruthenium indenylidene complexes bearing bulky N-heterocyclic carbenes are present in the literature, no studies have been done to understand how steric hindrance affects the process. For these reasons, [RuCl₂(IPr*)(PPh₃)(3-phenylindenylidene)] (IPr*-PPh₃) and [RuCl₂(IPr*)(Py)(3-phenylindenylidene)] (IPr*-Py), bearing the very bulky ligand, IPr* have been synthesised and compared with [RuCl₂(IPr)(PPh₃)(3-phenylindenylidene)] (IPr-PPh₃) and the new [RuCl₂(IPr)(Py)(3-phenylindenylidene)] (IPr-Py).
Another important aspect, presented in this thesis, is the investigation of the stability of indenylidene pre-catalysts in alcohol solvents. Surprisingly, several different decomposition processes occur depending on the starting complex and the alcohol used. Mechanistic investigation into this decomposition, allowed us to develop a better understanding of this process, and to predict the decomposition product based on the environment. In particular, this study revealed that [RuCl(η⁵-3-phenylindenyl)(PPh₃)₂] (Eta-5) is accessed from [RuCl₂(3-phenylindenylidene)(PPh₃)₂] (M₁₀) via a novel indenylidene to η⁵-indenyl rearrangement. This formal decomposition product has been found to be active in at least 20 different catalytic transformations, rendering it a versatile catalytic tool
High frequency elastic wave inversion
No full textThis thesis is concerned with the problem of high frequency elastic wave inversion. This is the problem of determining sharp, localised changes in the properties of materials beneath the surface of the earth using only measurements of reflected seismic waves taken at or near the surface.
The central objective of this thesis is to construct multiparameter inversion operators
which map data from surface wave measurements into accurate estimates for the high frequency perturbations in the density, ρ, and in the 21 independent Hooke’s tensor components, cijkl, of subsurface anisotropic inclusions. Using results from the field of microlocal analysis of Fourier Integral Operators, it is shown that asymptotically valid inversion operators exist which can invert all 22 independent elastic parameter perturbations directly, without relying on statistical estimates. To gather the required data, the technique of using ensembles of linked seismic experiments
is introduced and extensively analysed in the context of a standard linearised
single scattering model for elastic waves based on the Born approximation. This technique builds on work by Burridge and others in [10:Burridge R. ; De Hoop M. V. ; Miller D. ; Spencer C. ; 1998], and by Nolan in [17:Clifford J. Nolan 1997][49:Nolan and Ryan 2007]. In addition, a fundamental theoretical analysis of the seismic inversion problem is carried out. By analysing important components of the seismic forward problem, a theoretical
framework is introduced which allows the determination of whether or not multiparameter inversion is possible, and specifically with what types of seismic ensembles and elastic wave modes. In particular, this framework will show under which circumstances multiparameter
inversion is not possible, both for the case of point anisotropic inclusions, and in
particular for larger volume inclusions. It is shown that these results can be extended to inversion in multiple type of seismic backgrounds. To complement the theoretical results, an application of evolutionary algorithm is presented which is used to find practical invertible seismic ensembles which allow inversion to be carried out feasibly.
The thesis also presents a introductory overview of the techniques of Fourier Integral Operators and microlocal analysis, which are used to construct later inversion models. Other more elaborate mathematical techniques used in the thesis are also introduced or expanded on in the appendices for the benefit of the general reader.
Finally, supporting lemmas in the appendices introduce a new method for determining
the component dependencies of linear elastic materials
The Nolan Street of Pompeii in Chapter VI of Das Templum by Heinrich Nissen
No full textIn the Chapter VI of a book by Heinrich Nissen, entitled Das Templum, 1869, we can find the author claiming the Nolan Street of Pompeii had been aligned according to the sunrise on summer solstices. Here we discuss how Nissen justified his thought. We will see in particular his point of view about the orientation according to sunrise as rebuked by Hyginus. In the discussion, we will also mention the observations made by Ferdinando Castagnoli on Nissen's Das Templum and by Stefano De Caro on the orientation of the Nolan Street
C. J. Gallagher, left and Reverend L. M. DeFalco
No full textTrustee C. J. Gallagher congratulates Reverend L. M. DeFalco, whom the Robert M. Nolan Council, Knights of Columbus.https://mavmatrix.uta.edu/specialcollections_startelegram1950s/16373/thumbnail.jp
Phthinomita symplocos Nolan & Cribb 2006, n. sp.
No full text<i>Phthinomita symplocos</i> n. sp. (Figs. 8, 15–22) <p> Type host: <i>Siganus lineatus</i> (Valenciennes), Goldlined Rabbitfish (Perciformes: Siganidae).</p> <p>Site in host: Intertrabecular spaces of ventricle (heart).</p> <p>Type locality: Lizard Island, northern Great Barrier Reef (14°40’S 145°27’E), Queensland.</p> <p> Material examined: ex <i>S</i>. <i>lineatus</i>, Lizard Island (QLD), May 2004, twenty­seven specimens (Holotype no. QM G 225528; Paratype nos. QM G 225529–225537) (another three specimens used for scanning electron microscopy and nineteen specimens sequenced for ITS2).</p> <p>Collector: M.J. Nolan.</p> <p> <i>Etymology</i></p> <p> Specific name “ <i>Symplokos</i> ” (Gr. interwoven, involved), for the host­parasite system described here.</p> <p> <i>Description</i></p> <p>Based on 27 whole mounts. With features of genus. Body slightly notched at male genital pore. Vestigial oral sucker bearing 5 concentric rows of fine spines. Intestine; posterior caeca irregular, distal portions expanded. Anterior testis originating posterior to intercaecal field, margins lobed, containing dorso­ventral muscle fibres. Posterior testis elliptical, margins lobed, rudimentary (may have sperm anteriorly, testis tissue posteriorly (see Figure 8a)). Vas deferens seen antero­dextral to posterior margin of anterior testis; duct from posterior testis passing antero­medially. Cirrus­sac tear­shaped. Internal seminal vesicle ovoid, occupying posterior of cirrus­sac; ejaculatory duct sinuous; prostatic cells not seen. Ovary spherical to ovoid, slightly overlapping posterior margin of anterior testis. Oviduct originating at posterior dorsal margin of ovary, dorsal to vas deferens, entering oötype postero­dorsally. Vitelline duct forming anterior to cirrus­sac, posteriorly dextral to vas deferens and cirrus­sac. Oötype ovoid. Mehlis’ gland extending anteriorly to posterior margin of cirrus­sac, extending posteriorly to anterior margin of posterior testis. Uterus extending from oötype sinuously, sinistral to oviduct. Uterine chamber forming posterior to posterior margin of ovary, sinuous, curving dorsally posteriorly to female pore. Vitelline follicles extending anteriorly past intestinal bifurcation, sinistral and dextral to oesophagus, posterior caeca and anterior testis, posteriorly extending to mid­section of uterine chamber.</p> <p> <i>Remarks</i></p> <p> There are 7–35 base differences (1.9–10.7% sequence divergence) between the ITS2 rDNA sequence of <i>P. symplocos</i> <b>n. sp.</b> and the remaining <i>Phthinomita</i> species sequenced here. Between the sequences from <i>P</i>. <i>symplocos</i> from <i>S. lineatus</i> off Lizard Island (15 replicates) and <i>P. munozae</i> <b>n. sp.</b> from <i>C</i>. <i>venustus</i> off Heron Island (four replicates) there are seven bases different.</p>Published as part of <i>Nolan, Matthew J. & Cribb, Thomas H., 2006, An exceptionally rich complex of Sanguinicolidae von Graff, 1907 (Platyhelminthes: Trematoda) from Siganidae, Labridae and Mullidae (Teleostei: Perciformes) from the Indo-west Pacific Region, pp. 1-80 in Zootaxa 1218 (1)</i> on pages 35-38, DOI: 10.11646/zootaxa.1218.1.1, <a href="http://zenodo.org/record/5064858">http://zenodo.org/record/5064858</a>
Phthinomita munozae Nolan & Cribb 2006, n. sp.
No full textPhthinomita munozae n. sp. (Figs. 47–49) Type host: Choerodon venustus (De Vis), Venus Tuskfish (Perciformes: Labridae). Site in host: Intertrabecular spaces of ventricle (heart). Type locality: Heron Island, southern Great Barrier Reef (23°27'S 151°55'E), Queensland. Material examined: ex C. venustus, Heron Island (QLD), Apr. 2001, Jul. 2001, twentytwo partial and complete specimens (Holotype no. QM G 225628; Paratype nos. QM G 225629–225633). Collector: M.J. Nolan. Locality: 1. Heron Island; 2. Lizard Island; 3. Ningaloo Reef; 4. Palau; 5. Swain Reefs Complex; 6. Stanley Harbour, Tasmania; 7. Point Peron, Western Australia. Etymology Specific name for our friend Miss Gabriela Muñoz Cerda of the Marine Parasitology Lab, University of Queensland. Description Based on 22 whole and partial mounts. With features of genus. Body curving dextrally posteriorly, slightly notched at male pore. Anterior testis originating posterior to intercaecal field, but, anterosinistral to distal termination of right posterior caecum, margins lobed. Posterior testis ovoid, margins lobed. Vas deferens seen anterior to posterior margin of anterior testis, ventrodextrally; duct from posterior testis passing anterosinistrally. Cirrussac obovate. Internal seminal vesicle ovoid, occupying ventral region of cirrussac; ejaculatory duct straight; prostatic cells small. Ovary triangular, posterior to posterior margin of anterior testis. Oviduct originating at centre of posterior margin of ovary, sinuous. Vitelline duct forming posterior to posterior margin of ovary, sinuous; vitelline reservoir forming anterior to anterior margin of cirrussac, sinuous, entering oötype posterodorsally. Oötype ovoid, medial. Mehlis' gland extending anteriorly to posterior margin of cirrussac, extending posteriorly to midsection of posterior testis. Uterus extending from oötype, sinuous. Uterine chamber forming laterally to posterior margin of ovary, sinuous, thin anteriorly, widening posteriorly, narrowing again before passing dorsally to female genital pore. Vitelline follicles extending anteriorly past intestinal bifurcation, extending posteriorly past posterior margin of ovary, filling intercaecal field, posteriorly passing medially. Remarks This species shows close affinity to the genus Phthinomita and is distinguished from its congeners in the combined possession of a body 31.8–41.8 times longer than wide with only a slight notch level with the male pore, posterior caeca that occupy 30–41% of the body length, an anterior testis that is positioned posterior to the intercaecal field but anterosinistrally to the distal termination of the right posterior caecum, is 11.2–21.2 times longer than wide, occupies 27–44% of the body length and is 11.7–25.0 times longer than the posterior testis. Phthinomita munozae is also distinguished in having a posterior testis that occupies 2–3% of the body length and 11–43% of the body width, a transversely obovate cirrussac, a triangular ovary positioned 11–15% of the body length from the posterior end, a uterine chamber 179–364 (297) x 22–58 (44) and vitelline follicles that extend anteriorly well past the intestinal bifurcation. There are in addition, 1–32 base differences (0.3–9.6% sequence divergence) between the ITS2 sequence of P. munozae and the remaining Phthinomita species reported here. Between sequences from P. munozae (four replicates) from Choerodon venustus off Heron Island and P. poulini n. sp. (eight replicates) from three sympatric mullid hosts off Lizard Island there is one base difference.Published as part of Nolan, Matthew J. & Cribb, Thomas H., 2006, An exceptionally rich complex of Sanguinicolidae von Graff, 1907 (Platyhelminthes: Trematoda) from Siganidae, Labridae and Mullidae (Teleostei: Perciformes) from the Indo-west Pacific Region, pp. 1-80 in Zootaxa 1218 (1) on pages 57-60, DOI: 10.11646/zootaxa.1218.1.1, http://zenodo.org/record/506485
Student Recital: Nolan Driscoll (April 21, 2015)
No full textLa Cathedral Sonata / Agustín Barrios Mangore Preludio saudade Andante religioso Allegro solemne
Suite for Lute in C minor, BWV 997 / Johann Sebastian Bach Praeludio Sarabande Gigue Double
Schubert’sche Lieder fur die Guitare / Franz Schubert Lob der Thränen (arr. Johann Kaspar Mertz) Ständchen
Suite for Cello in G Major, BWV 1007 / J. S. Bach Preludehttps://vc.bridgew.edu/student_concerts/1087/thumbnail.jp
Circumvitellatrema momota n. gen., n. sp. (Digenea: Cyclocoelidae: Cyclocoelinae) from a captive-hatched blue-crowned motmot, Momotus momota (Momotidae)
No full textDronen, Norman O., Greiner, Ellis C., Ialeggio, Donna M., Nolan, Thomas J. (2009): Circumvitellatrema momota n. gen., n. sp. (Digenea: Cyclocoelidae: Cyclocoelinae) from a captive-hatched blue-crowned motmot, Momotus momota (Momotidae). Zootaxa 2161: 60-68, DOI: 10.5281/zenodo.18898
Metal bioaccumulation and toxicity in soils - why bother with speciation?
No full textCopyright © 2003 CSIROThis review assesses metal speciation in soils, including analytical techniques used for measurement and the advantages and disadvantages of using chemical speciation information, in both the solid and aqueous phase, to predict adverse effects of metal contamination in soils and for use in soil protection policies. Other techniques used to assess metal lability and bioavailability in soil are also discussed.Annette L. Nolan, Enzo Lombi and Mike J. McLaughli
Cardicola watsonensis Nolan & Cribb 2006, n. sp.
No full textCardicola watsonensis n. sp. (Figs 27–30) Type host: Siganus corallinus (Valenciennes), Coral Rabbitfish (Perciformes: Siganidae). Site in host: Atrium and ventricle (heart). Type locality: Lizard Island, northern Great Barrier Reef (14º40'S 145º27'E), Queensland. Material examined: ex S. corallinus, Lizard Island (QLD), Aug. 2002, Jan. 2003, one specimen (no QM G 225228) (two specimens sequenced for ITS2). Prevalence of Infection: One of fortythree S. corallinus from Lizard Island infected with three specimens. Collector: M.J. Nolan. Etymology Specific name for the only site off Lizard Island (Watson's Bay) where the new species has been found so far. Description Based on one whole mount. With features of genus. Body elliptical, 982 x 186, 5.3 times longer than wide (Figure 27). Tegumental spine rows 5–10 (8) wide, 5–6 spines per row. Nerve chords conspicuous; nerve commissure 91 or 9% of body length from anterior end. Oral sucker obovate, 24 x 22, delimited posteriorly by fine membrane and slight body constriction, bearing unknown number of concentric rows of fine spines (Figure 28). Mouth 13 from anterior end. Oesophagus sinuous, width relatively consistent along length, posterior half surrounded by gland cells, 517 or 53% of body length. Intestine Xshaped; anterior caeca equal, sinuous, right anterior caecum 134 long, left anterior caecum 134 long, length 14% of body length, wider than posterior pair, right anterior caecum dorsal to oesophagus; posterior caeca convoluted, unequal, right posterior caecum 242 long, left posterior caecum 272 long; length 28% of body length, 2.0 times longer than anterior pair, regular in outline compared to anterior caeca, terminal extremities expanded. Testis extending laterally to intercaecal field, terminating before posterior margin of posterior caeca, 241 or 25% of body length x 116 or 62% of body width, 2.1 times longer than wide. Vas deferens originates at posterior margin of testis medially, passing posteriorly sinuously, expanding distally to form seminal vesicle. Seminal vesicle elliptical, 116 or 12% of body length from posterior end, 80 x 49, 1.6 times longer than wide (Figure 29). Ejaculatory duct straight, posteriorly directed; prostatic cells not seen. Male genital pore sinistral, submarginal. Ovary reniform, anteriorly intercaecal, posteriorly extending outside field, 87 or 9% of body length x 127 or 68% of body width, 181 or 18% of body length from posterior end. Oviduct originating dorsoanteriorly to posterodextral margin of ovary, at posterior margin expands to form oviducal seminal receptacle, narrowing level with anterior margin of seminal vesicle, continuing posteriorly, joining with vitelline duct posteriorly to seminal vesicle. Oviducal seminal receptacle elliptical, 48 x 25, 1.9 times longer than wide, dorsal to ovary. Vitelline duct seen posterior to posterior margin of testis, passing posteriorly sinuously, ventral to ovary, oviducal seminal receptacle, vas deferens and seminal vesicle. Oötype elliptical, posterior to seminal vesicle, 32 x 27. Mehlis' gland not seen. Uterus convoluted, passing anterosinistrally from oötype, crossing midline lateral to oötype, then passing anterodextrally, dorsal to oötype, oviduct, oviducal seminal receptacle and vas deferens, but ventral to seminal vesicle, lateral to oviducal seminal receptacle passes sinistrally across midline, ventral to ovary, then passes posterodextrally to join metraterm (Figure 30). Metraterm ovoid, dorsally directed, 43 x 25. Female genital pore opening dorsomedially, lateral to oviducal seminal receptacle, anterior to seminal vesicle, anterodextral to male genital pore. Eggs spherical, 21–22 (21) x 16–18 (17) (n=3). Vitellarium follicular, anteriorly extending past nerve commissure, posteriorly extending to level of oviducal seminal receptacle, anteriorly dorsal to lateral nerve chords, both dorsal and ventral to oesophagus, intestine and testis, posteriorly ventral to ovary. Excretory vesicle spherical, 5 in diameter. Excretory pore not seen. Remarks This species shows close affinity with the characters differentially diagnostic of the genus Cardicola and is here identified as a new species in that genus. Cardicola watsonensis n. sp. is distinguished by the combined possession of an oral sucker, an oesophagus that is sinuous and that extends 53% of the body length, posterior caeca that are convoluted and extend 28% of the body length, an elliptical seminal vesicle with a long posteriorly directed ejaculatory duct, a male genital pore that opens anteriorly to the oötype, a reniform ovary that is almost entirely postcaecal and vitelline follicles that extend anteriorly past the nerve commissure and posteriorly to the level of the female genital pore. Cardicola watsonensis n. sp. appears most similar to C. bartolii n. sp., also from S. corallinus. Both species have an oral sucker, an oesophagus that is sinuous (by comparison to Cardicola mugilis), oesophageal glands that surround only the posterior half of the oesophagus, convoluted posterior caeca, a testis that is mostly intercaecal (does not extend posteriorly to this field) and is rectangular with irregular margins and a seminal vesicle that is no more than 13% of the body length from the posterior end. These two species also have an ovary that is anteriorly intercaecal, a uterus that extends anteriorly past the posterior margin of the ovary (but not past the anterior margin as in Cardicola congruenta) and is entirely postcaecal and vitelline follicles that extend anteriorly past the nerve commissure. Cardicola watsonensis n. sp. differs from C. bartolii n. sp. in having an entirely convoluted uterus that extends anteriorly from the oötype rather than one that is convoluted posteriorly, sinuous anteriorly and that extends posteriorly from the oötype before looping anteriorly, a reniform ovary rather than a bilobed one, a male genital pore that opens anteriorly to the oötype rather than lateral to it and vitelline follicles that extend posteriorly to the level of the female pore rather than to the posterior margin of the ovary.Published as part of Nolan, Matthew J. & Cribb, Thomas H., 2006, Cardicola Short, 1953 and Braya n. gen. Digenea: Sanguinicolidae) from five families of tropical Indo-Pacific fishes (, pp. 1-80 in Zootaxa 1265 (1) on pages 30-31, DOI: 10.11646/zootaxa.1265.1.1, http://zenodo.org/record/506551
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