Preface to the Princeton Landmarks in Biology Edition vii Preface xi Symbols Used xiii 1. The Importance of Islands 3 2. Area and Number of Speicies 8 3. Further Explanations of the Area-Diversity Pattern 19 4. The Strategy of Colonization 68 5. Invasibility and the Variable Niche 94 6. Stepping Stones and Biotic Exchange 123 7. Evolutionary Changes Following Colonization 145 8. Prospect 181 Glossary 185 References 193 Index 201

The Theory of Island Biogeography

We consider 27 population and community terms used frequently by parasitologists when describing the ecology of parasites. We provide suggestions for various terms in an attempt to foster consistent use and to make terms used in parasite ecology easier to interpret for those who study free-living organisms. We suggest strongly that authors, whether they agree or disagree with us, provide complete and unambiguous definitions for all parameters of their studies.

/pdf/parasitology-meets-ecology-on-its-own-terms-margolis-et-al-4c6w2pahe6.pdf

Parasitology meets ecology on its own terms: Margolis et al. revisited.

The Cambridge Structural Database (CSD) contains a complete record of all published organic and metal–organic small-molecule crystal structures. The database has been in operation for over 50 years and continues to be the primary means of sharing structural chemistry data and knowledge across disciplines. As well as structures that are made public to support scientific articles, it includes many structures published directly as CSD Communications. All structures are processed both computationally and by expert structural chemistry editors prior to entering the database. A key component of this processing is the reliable association of the chemical identity of the structure studied with the experimental data. This important step helps ensure that data is widely discoverable and readily reusable. Content is further enriched through selective inclusion of additional experimental data. Entries are available to anyone through free CSD community web services. Linking services developed and maintained by the CCDC, combined with the use of standard identifiers, facilitate discovery from other resources. Data can also be accessed through CCDC and third party software applications and through an application programming interface.

https://journals.iucr.org/b/issues/2016/02/00/bm5086/bm5086.pdf

The Cambridge Structural Database

Statistics for Spatial Data.

This book is the second of two volumes in a series on terrestrial and marine comparisons, focusing on the temporal complement of the earlier spatial analysis of patchiness and pattern (Levin et al. 1993). The issue of the relationships among pattern, scale, and patchiness has been framed forcefully in John Steele’s writings of two decades (e.g., Steele 1978). There is no pattern without an observational frame. In the words of Nietzsche, “There are no facts… only interpretations.”

https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.2307/1941447

The Problem of Pattern and Scale in Ecology: The Robert H. MacArthur Award Lecture

In this paper, a high-throughput droplet method is presented for screening corrosion inhibitors, particularly for those metals that are subjected to pitting. To this objective, AA5083 was used as a case study as it is subject to pitting corrosion in saline solution containing different corrosion inhibitors. This paper outlines how critical parameters are measured and calculated (average pit depth and maximum pit depth) and the errors and consistency of the method, and the definition of corrosion inhibition via the method. The results from this method were then compared to the results of inhibition efficiency derived from potentiodynamic polarization scans for inhibitors with a range of performance. The method was conducted at temperature [Formula: see text]C inside a humidity chamber, and concentration 10[Formula: see text] M of seven chemical compounds that have similarities in their structures. The discrepancies were profound for the cases where the inhibitor was of low efficiency, which is ascribed to the fact that these pits’ growth is dominated by that of a few large pits. 

A droplet-based high-throughput approach for screening corrosion inhibitors: A proof of concept study on Aluminium alloy 5083

An improved preparation of CpMoCl 2 (O) (Cp=η-C 5 H 5 ) from [MoCl 3 (O)] n and Bu 3 n Sn(C 5 H 5 ) is described. Reduction of CpMoCl 2 (O) with zinc powder in tetrahydrofuran (THF) gave diamagnetic {[CpMoCl] 4 (μ-O) 6 }(ZnCl(THF)) 2 , formally containing two Mo(IV) and two Mo(V) centers. Reoxidation of {[CpMoCl] 4 (μ-O) 6 }(ZnCl(THF)) 2 with O 2 gave green [CpMoCl(O)] 2 (μ-O) (containing two Mo(V) centers), colorless [ZnCl(THF)(μ-Cl)] ∞

Cyclopentadienyl Oxides of Molybdenum.

The preparation of the series of osmium(II) complexes, tram- and cis-[Os(pdma)2X(CO)][BPh4][X = Cl, Br, or I; pdma =o-phenylenebis(dimethylarsine)] and [Os(pdma)2X2(CO)](X = Br or I), is reported, together with their i.r. and n.m.r. spectra. The complexes [Os(pdma)2X2(CO)] contain one uni- and one bi-dentate pdma ligand, and a crystal structure analysis of [Os(pdma)2Br2(CO)] shows that the osmium atom is octahedrally co-ordinated by two trans-Br ligands, one CO trans to a bidentate pdma, and the arsenic of one unidentate pdma. The unco-ordinated arsenic of the unidentate pdma is 4.36 A from the osmium. Crystal data: a= 15.70(1), b= 11.48(1), c= 17.51(1)A, β= 115.89(3)°, Z= 4, space group P21/c: final R 0.048 for 2 047 observed reflections (by full-matrix refinement). The [Os(pdma)2X2(CO)] complexes give cis-[Os(pdma)2X(CO)]+ on heating, and the cis complexes isomerize to the trans on further heating. The preparation and properties of the osmium(III) complexes [NBun4][Os(pdma)X4(CO)](X = Cl, Br, or I), which also contain a unidentate pdma ligand, are reported.

Carbonylhalogeno(o-phenylenebis(dimethylarsine))osmium complexes, including those containing unidentate o-phenylenebis(dimethylarsine)

X-Ray Crystal Structures of the 1,3,2-Benzodithiazolyl Dimer and 1,3,2- Benzodithiazolium Chloride Sulfur Dioxide Solvate: Comparison of the Molecular and Electronic Structures of the 10-π-Electron C6H4S2N+ Cation and the C6H4S2N× Radical and Dimer and a Study of the Variable-Temperature Magnetic Behavior of the Radical

The salt [SNS][AsF6] undergoes a quantitative multiple cycloaddition reaction with cyanogen to give the planar, centrosymmetric dication ([graphic omitted])22+, which has been characterised by vibrational and 13C NMR spectroscopy, chemical analysis and X-ray crystallography. While the reaction between cyanogen and SNS+ must proceed via a 1 : 1 cycloadduct, NC[graphic omitted]+, this was not prepared or observed. The cycloaddition of SNS+ to NC[graphic omitted]+ must therefore be kinetically preferred, contrary to arguments based on simple frontier molecular orbital (FMO) theory. By contrast, the reaction of [SNS][AsF6] with [NC[graphic omitted]CH][AsF6] to give [H [graphic omitted]]–[graphic omitted]][AsF6]2 was complete only after 10 weeks at 50 °C, in complete accord with FMO theory. These results are rationalised in terms of the influence of high-energy, in-plane molecular orbitals and the electrostatic interaction between SNS+ and the slightly negatively charged nitrogen atom (N) in the [graphic omitted]+ ring, which facilitates the second cycloaddition. The salt [([graphic omitted])2][AsF6]2 potentially provides access to a new family of eight other bicyclic CNS dications, radical cations and diradicals, of which .[graphic omitted]–[graphic omitted]+, +[graphic omitted]–[graphic omitted]˙ and +[graphic omitted]–[graphic omitted]+ are reported.

Peter S. White

Papers

A droplet-based high-throughput approach for screening corrosion inhibitors: A proof of concept study on Aluminium alloy 5083

Cyclopentadienyl Oxides of Molybdenum.

Carbonylhalogeno(o-phenylenebis(dimethylarsine))osmium complexes, including those containing unidentate o-phenylenebis(dimethylarsine)

5,5′‐Bi(1,3,2,4‐dithiadiazolylium)(2+) Bis(hexafluoroarsenate(V)): A General Synthetic Strategy to Molecules and Radicals Containing Thiazyl Rings.