University of Auckland

About: University of Auckland is a education organization based out in Auckland, New Zealand. It is known for research contribution in the topics: Population & Context (language use). The organization has 28049 authors who have published 77706 publications receiving 2689366 citations. The organization is also known as: The University of Auckland & Auckland University College.

Interactions between starch and phenolic compound

Abstract: The non-covalent interactions between starch and phenolic compounds may impact on the physicochemical and nutritional properties of food. Starch and phenolic compound interact to form either inclusion complex in the form of amylose single helices facilitated by hydrophobic effect, or complex with much weaker binding most through hydrogen bonds. The outcome of the interactions and their impact on the food properties appear to be dependent on the type and structure of both phenolic compound and starch as well as the method of preparing the complex. This review summarises the current knowledge of the influence of the interactions on the physicochemical properties and digestion of starch system, the bioavailability of phenolic compound, and the non-covalent nature of starch-phenolic compound interactions. Plant extracts rich in phenolic compounds as well as purified phenolic compounds are included. Research opportunities to better understand and utilize these interactions for food applications are suggested.

A comparison of methods for the statistical analysis of spatial point patterns in plant ecology

Abstract: We describe a range of methods for the description and analysis of spatial point patterns in plant ecology. The conceptual basis of the methods is presented, and specific tests are compared, with the goal of providing guidelines concerning their appropriate selection and use. Simulated and real data sets are used to explore the ability of these methods to identify different components of spatial pattern (e.g. departure from randomness, regularity vs. aggregation, scale and strength of pattern). First-order tests suffer from their inability to characterise pattern at distances beyond those at which local interactions (i.e. nearest neighbours) occur. Nevertheless, the tests explored (first-order nearest neighbour, Diggle’s G and F) are useful first steps in analysing spatial point patterns, and all seem capable of accurately describing patterns at these (shorter) distances. Among second-order tests, a density-corrected form of the neighbourhood density function (NDF), a non-cumulative analogue of the commonly used Ripley’s K-function, most informatively characterised spatial patterns at a range of distances for both univariate and bivariate analyses. Although Ripley’s K is more commonly used, it can give very different results to the NDF because of its cumulative nature. A modified form of the K-function suitable for inhomogeneous point patterns is discussed. We also explore the use of local and spatially-explicit methods for point pattern analysis. Local methods are powerful in that they allow variations from global averages to be detected and potentially provide a link to recent spatial ecological theory by taking the ‚plant’s-eye view’. We conclude by discussing the problems of linking spatial pattern with ecological process using three case studies, and consider some ways that this issue might be addressed.

Molecular structure, binding properties and dynamics of lactoferrin.

Abstract: Lactoferrin (Lf), a prominent protein in milk, many other secretory fluids and white blood cells, is a monomeric, 80-kDa glycoprotein, with a single polypeptide chain of about 690 amino acid residues. Amino acid sequence relationships place it in the wider transferrin family. Crystallographic analyses of human Lf, and of the Lfs from cow, horse, buffalo and camel, reveal a highly conserved three-dimensional structure, but with differences in detail between species. The molecule is folded into homologous N- and C-terminal lobes, each comprising two domains that enclose a conserved iron binding site. Iron binding and release is accompanied by domain movements that close or open the sites, and is influenced by cooperative interactions between the lobes. Patches of high positive charge on the surface contribute to other binding properties, but the attached glycan chains appear to have little impact on structure and function.

A Tripartite Approach to Right‐Wing Authoritarianism: The Authoritarianism‐Conservatism‐Traditionalism Model

Abstract: Right‐Wing Authoritarianism (RWA) has been conceptualized and measured as a unidimensional personality construct comprising the covariation of the three traits of authoritarian submission, authoritarian aggression, and conventionalism. However, new approaches have criticized this conceptualization and instead viewed these three "traits" as three distinct, though related, social attitude dimensions. Here we extend this approach providing clear definitions of these three dimensions as ideological attitude constructs of Authoritarianism, Conservatism, and Traditionalism. These dimensions are seen as attitudinal expressions of basic social values or motivational goals that represent different, though related, strategies for attaining collective security at the expense of individual autonomy. We report data from five samples and three different countries showing that these three dimensions could be reliably measured and were factorially distinct. The three dimensions also differentially predicted interpersonal behaviour, social policy support, and political party support. It is argued that conceptualizing and measuring RWA as a set of three related ideological attitude dimensions may better explain complex sociopolitical phenomena than the currently dominant unidimensional personality based model.