title: Studies of New Zealand Marine Organisms

authors: Till, Marisa

subjects: Natural products

abstract: The chemical study of three New Zealand marine organisms is described, along with a survey of the chemistry and biological activity of eighty-five marine organisms collected from New Zealand waters.
The study of the New Zealand marine bryozoan Pterocella vesiculosa has resulted in the isolation of three new compounds; pterocellin H, pterocellin I and 1-methyl-5-bromo-8-methoxy-β-carboline. These compounds were characterised using high resolution mass spectrometry, one- and two-dimensional nuclear magnetic resonance spectroscopy and X-ray crystallography. The biological activity of these compounds was investigated and a discussion of the results including a comparison with the activity of closely related compounds is also presented.
The crude extracts of eighty-five marine organisms were surveyed to establish their biological activity and chemical constituents. The results of this study indicated which species had interesting biological activity. The chemical survey allowed geographical and intra-species comparisons of chemical constituents between samples, as well as potentially indicating the presence of known secondary metabolites. For the Pterocella vesiculosa samples the survey methodology clearly illustrated the presence of pterocellins A and B.
Two marine organisms were chosen for further investigation based on their biological activity and chemical survey results. Bioactivity directed isolation procedures yielded no new compounds from the organisms. The sterol composition of these species is also presented.

text: Studies of New Zealand Marine Organisms The chemical study of three New Zealand marine organisms is described, along with a survey of the chemistry and biological activity of eighty-five marine organisms collected from New Zealand waters.
The study of the New Zealand marine bryozoan Pterocella vesiculosa has resulted in the isolation of three new compounds; pterocellin H, pterocellin I and 1-methyl-5-bromo-8-methoxy-β-carboline. These compounds were characterised using high resolution mass spectrometry, one- and two-dimensional nuclear magnetic resonance spectroscopy and X-ray crystallography. The biological activity of these compounds was investigated and a discussion of the results including a comparison with the activity of closely related compounds is also presented.
The crude extracts of eighty-five marine organisms were surveyed to establish their biological activity and chemical constituents. The results of this study indicated which species had interesting biological activity. The chemical survey allowed geographical and intra-species comparisons of chemical constituents between samples, as well as potentially indicating the presence of known secondary metabolites. For the Pterocella vesiculosa samples the survey methodology clearly illustrated the presence of pterocellins A and B.
Two marine organisms were chosen for further investigation based on their biological activity and chemical survey results. Bioactivity directed isolation procedures yielded no new compounds from the organisms. The sterol composition of these species is also presented.

year: 2007

title: Alerting in a Digital Library environment - Do Channels meet the requirements?

authors: Faensen, Daniel

subjects: computer science

abstract: An Alerting Service (AS) informs its clients about new information provided by several suppliers. Special interests of clients can be defined as profiles. In the context of digital libraries, suppliers are the providers of documents. Providers are typically scientific publishers. In this paper we assume, that the providers are known to the clients. A general model and architecture of an Alerting Service is given in [1]. Channel technology has been developed for broadcast of news and continous streams of data like stock rates. For the digital library enviroment a finer granularity in profile definition than for common broadcasting is needed. In contrast to broadcast services, publishing events of multiple providers have to be presented to each client in a uniform way. 
In this summary we evaluate how the two competing approaches of Channel technology, Netscape’s Netcaster [3] and Microsofts Active Channels [2] meet these requirements. 
To satisfy user’s needs events have to be filtered by more or less complex profiles, e. g. a set of documents (like journals), a list of keywords (selected arbitraryly or from a thesaurus) or a query in a full-fledged query language like STARTS [4]. An easy-to-use and powerful profile definition language is one requirement for an AS. The second is a unified view, that means splitting the n:m-relationship between providers and clients. 
The use of both technologies strongly depends on how the contents is to be filtered, i.e. how the user profile is to be defined.

text: Alerting in a Digital Library environment - Do Channels meet the requirements? An Alerting Service (AS) informs its clients about new information provided by several suppliers. Special interests of clients can be defined as profiles. In the context of digital libraries, suppliers are the providers of documents. Providers are typically scientific publishers. In this paper we assume, that the providers are known to the clients. A general model and architecture of an Alerting Service is given in [1]. Channel technology has been developed for broadcast of news and continous streams of data like stock rates. For the digital library enviroment a finer granularity in profile definition than for common broadcasting is needed. In contrast to broadcast services, publishing events of multiple providers have to be presented to each client in a uniform way. 
In this summary we evaluate how the two competing approaches of Channel technology, Netscape’s Netcaster [3] and Microsofts Active Channels [2] meet these requirements. 
To satisfy user’s needs events have to be filtered by more or less complex profiles, e. g. a set of documents (like journals), a list of keywords (selected arbitraryly or from a thesaurus) or a query in a full-fledged query language like STARTS [4]. An easy-to-use and powerful profile definition language is one requirement for an AS. The second is a unified view, that means splitting the n:m-relationship between providers and clients. 
The use of both technologies strongly depends on how the contents is to be filtered, i.e. how the user profile is to be defined.

year: 1998

title: Intra-propositional relations and their signalling: An investigation of authentic Māori texts

authors: Whaanga, Hēmi

subjects: Language & education

abstract: I report here on one part of a research project that involved the investigation of a range of authentic Māori texts in terms of two types of meaning relation – those that operate within propositions (‘intra-propositional relations’) and those that link propositions or groups of propositions (‘inter-propositional relations’). The focus here is on intra-propositional relations (relationships within propositions). On the basis of the comparison of a number of intra-propositional relational models, a new model which draws inspiration from the work of Crombie is proposed and applied to a corpus of texts written in Māori, the emphasis being on the ways in which these relations are signalled in Māori.

text: Intra-propositional relations and their signalling: An investigation of authentic Māori texts I report here on one part of a research project that involved the investigation of a range of authentic Māori texts in terms of two types of meaning relation – those that operate within propositions (‘intra-propositional relations’) and those that link propositions or groups of propositions (‘inter-propositional relations’). The focus here is on intra-propositional relations (relationships within propositions). On the basis of the comparison of a number of intra-propositional relational models, a new model which draws inspiration from the work of Crombie is proposed and applied to a corpus of texts written in Māori, the emphasis being on the ways in which these relations are signalled in Māori.

year: 2010