98,191 research outputs found
Towards a fuller understanding of selected molecular compounds
No full textThis work is separated into two distinct sections. The first section deals with the analysis by variable temperature single crystal X-ray diffraction of crystalline molecular materials with novel physical properties. The second section details the electron density analysis of selected crystalline compounds using high resolution, low temperature single crystal X-ray diffraction. Chapter 1 provides introduction to X-ray diffraction outlining the theory this work is based on. Chapter 2 introduces the molecular material studies based on materials containing the bis(ethylenedithio)-tetrathiaftilvalene molecule. The aim of these studies was to achieve a greater understanding of the materials and the changes they undergo when exposed to variations in temperature whilst in the crystalline state. These structural changes observed are very minor but have dramatic effects on the electrical properties of the materials studied. It became apparent that the only way to form a full understanding of these materials was to be able to 'see' the electronic configuration of the materials, not just their gross structure. The field of electron density analysis by X- ray diffraction is now a well documented area. Chapter 4 provides an introduction to the field of electron density analysis. Diffraction experiments were conducted on systems of different complexity to investigate this field and these results are reported in Chapter 5. No electron density analyses have been conducted on the molecular materials studied in Chapter 3 as yet, due to the lack of crystals of suitable quality. It was also noted that to fully categorise the nature of the physical changes occurring in these structures that a diffractometer capable of analysing these samples throughout the temperature range of their physical phenomena was needed. An outline for the development of such a diffractometer is detailed in Chapter 6, 'future works'
Joshua Davis: Author of Spare Parts
No full textCitation: K-State First (2016). Joshua Davis: Author of Spare Parts [Flier]. Manhattan, Kansas: K-State First.Flyer advertising Joshua Davis's author talk at Kansas State University
Steven Johnson Author Talk Poster
No full textK-State Book NetworkA poster advertising an author talk by Steven Johnson at Kansas State University on September 3, 2014. Steven Johnson's book "The Ghost Map" was the 2014-2015 common book
Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution
No full textD, Leduc, K, Probert P., D, Nodder S. (2012): Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution. Zootaxa 3348: 40-55, DOI: 10.5281/zenodo.21040
The structure of a pentachromium(II) extended metal atom chain at 3 K: Cotton's conjecture proven
No full textWe provide definitive experimental proof that the archetypal string-like compound [Cr5(tpda)4(NCS)2] has alternating long and short Cr–Cr separations in the solid state, as conjectured by F. A. Cotton, rather than essentially equally spaced Cr atoms, as initially claimed (H2tpda = N2,N6-di(pyridin-2-yl)pyridine-2,6-diamine). Single-crystal X-ray data collected from 292 to 3 K revealed that the misinterpretation is caused by pseudo-merohedral twinning and that bond length alternation is enhanced at low temperature
FIGURE 3 V. a in Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution
No full textFIGURE 3 V. a ur a t a n. sp. A. Male posterior body region showing copulatory apparatus B. Female posterior body region showing chords. C. Mid-region of female body showing vulva and genital branches. Scale bar: A, B = 50 Μm; C = 145 Μm.Published as part of D, Leduc, K, Probert P. & D, Nodder S., 2012, Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution, pp. 40-55 in Zootaxa 3348 on page 46, DOI: 10.5281/zenodo.21040
FIGURE 1 in Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution
No full textFIGURE 1. Map of New Zealand showing bathymetric contours and study sites on (A) Challenger Plateau (top left panel) and (B) Chatham Rise (bottom panel), including sites sampled in 2001 (empty circles) and 2007 (filled circles). Site 10 is the type locality.Published as part of D, Leduc, K, Probert P. & D, Nodder S., 2012, Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution, pp. 40-55 in Zootaxa 3348 on page 42, DOI: 10.5281/zenodo.21040
Vasostoma Wieser 1954
No full textGenus Vasostoma Wieser 1954 Diagnosis (modified from Wieser 1954 and Jensen 1979): Cuticle undifferentiated laterally. Outer labial papillae immediately anterior to cephalic setae. Posterior portion of buccal cavity cylindrical to conical, provided with three small acute projections at border with anterior portion. Spicules bent. Gubernacular apophyses directed dorsocaudally.Published as part of D, Leduc, K, Probert P. & D, Nodder S., 2012, Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution, pp. 40-55 in Zootaxa 3348 on page 43, DOI: 10.5281/zenodo.21040
FIGURE 3 V. a in Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution
No full textFIGURE 3 V. a ur a t a n. sp. A. Male posterior body region showing copulatory apparatus B. Female posterior body region showing chords. C. Mid-region of female body showing vulva and genital branches. Scale bar: A, B = 50 Μm; C = 145 Μm.Published as part of D, Leduc, K, Probert P. & D, Nodder S., 2012, Two new free-living nematode species (Comesomatidae) from the continental slope of New Zealand, with keys and notes on distribution, pp. 40-55 in Zootaxa 3348 on page 46, DOI: 10.5281/zenodo.21040
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
- …
