title: The functionalisation of wool by tris(hydroxymethyl)phosphine for metal ion recovery

authors: Addison, Simon James

subjects: THP

abstract: Tris(hydroxymethyl)phosphine (THP) was prepared by the addition of a stoichiometric amount of base to tetrakis(hydroxymethyl)phosphonium chloride (THPC).  Freshly prepared THP was successfully immobilised onto wool through a Mannich-type condensation reaction between a hydroxymethyl group and an amine on the wool surface, forming stable gt;P-CH2-Nlt; coupling links.  The immobilisation of THP to wool stabilised the THP, which resulted in the decreased oxidation of THP to tris(hydroxymethyl)phosphine oxide (THPO).  

The presence of immobilised phosphine groups was determined colorimetrically by reaction with Ni2+ ions, which produced a bright orange nickel-phosphine complex, as well as quantitatively, by measuring nickel uptake using ICP-MS.  Immobilised THP-wool showed proportional binding for varying concentrations of metal solution.  Decreasing or increasing the concentration of the metal solution resulted in a corresponding proportional response of metal binding.  Following immobilisation onto wool, oxidation of the system by 6% H2O2 resulted in a reduced binding of 24% for Cu, 25% for Co, 27% for Ni, and 93% for Cd relative to unoxidised THP immobilised onto wool.

Additional modification of the THP-wool systems via reaction with amino acids and other related compounds overall did not appear to enhance the metal binding capacity relative to the unmodified THP-wool system.  The only modified THP-wool system that showed either retention or an increase in metal binding capacity for all metals analysed was that of 2-aminopyridine, followed by oxidation with H₂O₂.

text: The functionalisation of wool by tris(hydroxymethyl)phosphine for metal ion recovery Tris(hydroxymethyl)phosphine (THP) was prepared by the addition of a stoichiometric amount of base to tetrakis(hydroxymethyl)phosphonium chloride (THPC).  Freshly prepared THP was successfully immobilised onto wool through a Mannich-type condensation reaction between a hydroxymethyl group and an amine on the wool surface, forming stable gt;P-CH2-Nlt; coupling links.  The immobilisation of THP to wool stabilised the THP, which resulted in the decreased oxidation of THP to tris(hydroxymethyl)phosphine oxide (THPO).  

The presence of immobilised phosphine groups was determined colorimetrically by reaction with Ni2+ ions, which produced a bright orange nickel-phosphine complex, as well as quantitatively, by measuring nickel uptake using ICP-MS.  Immobilised THP-wool showed proportional binding for varying concentrations of metal solution.  Decreasing or increasing the concentration of the metal solution resulted in a corresponding proportional response of metal binding.  Following immobilisation onto wool, oxidation of the system by 6% H2O2 resulted in a reduced binding of 24% for Cu, 25% for Co, 27% for Ni, and 93% for Cd relative to unoxidised THP immobilised onto wool.

Additional modification of the THP-wool systems via reaction with amino acids and other related compounds overall did not appear to enhance the metal binding capacity relative to the unmodified THP-wool system.  The only modified THP-wool system that showed either retention or an increase in metal binding capacity for all metals analysed was that of 2-aminopyridine, followed by oxidation with H₂O₂.

year: 2009

title: Mining scientific trends based on topics in conference call for papers

authors: Bakar, Abu

abstract: Ever since analyzing scientific topics and evolution of technology have become vital for researchers, academics, funding institutes and research administration departments, there is a crucial need to mine scientific trends to fill this appetite more rigorously. In this paper, we procured a novel Call for Papers (CFPs) dataset in order to analyze scientific evolution and prestige of conferences that set scientific trends using scientific publications indexed in DBLP. Using ACM CSS, 1.3 million publications that appear in 146 data mining conferences are mapped into different thematic areas by matching the terms that appear in publication titles with ACM CSS. In recent years, an attempt termed as Topic Detection and Tracking (TDT) [1] is made to find the solution for the problem of "well-awareness" on this dynamic data. As conference ranking has been made by different forums on the basis of mixed indicators1. ERA2 ranks Australia's higher education research institutions. The major contributions of this paper are as follows: (i) compilation of CFPs dataset, (ii) identification of topics and keywords from CFP corpus, and (iii) measure the impact of these extracted hot topics from CFPs.

text: Mining scientific trends based on topics in conference call for papers Ever since analyzing scientific topics and evolution of technology have become vital for researchers, academics, funding institutes and research administration departments, there is a crucial need to mine scientific trends to fill this appetite more rigorously. In this paper, we procured a novel Call for Papers (CFPs) dataset in order to analyze scientific evolution and prestige of conferences that set scientific trends using scientific publications indexed in DBLP. Using ACM CSS, 1.3 million publications that appear in 146 data mining conferences are mapped into different thematic areas by matching the terms that appear in publication titles with ACM CSS. In recent years, an attempt termed as Topic Detection and Tracking (TDT) [1] is made to find the solution for the problem of "well-awareness" on this dynamic data. As conference ranking has been made by different forums on the basis of mixed indicators1. ERA2 ranks Australia's higher education research institutions. The major contributions of this paper are as follows: (i) compilation of CFPs dataset, (ii) identification of topics and keywords from CFP corpus, and (iii) measure the impact of these extracted hot topics from CFPs.

year: 2018

title: Inspiring national indigenous legal education for Aotearoa New Zealand's Bachelor of Laws Degree: Phase One

authors: Ruru, Jacinta

subjects: tikanga Maori, LLB law degree, legal education in New Zealand, bilculturalism, bilinguaiism, bijuralism

abstract: This Issues Paper is the result of the first stage of a multi-year, three-phase national project. In it we review the literature and consider some of the preliminary opportunities relevant for the teaching
of Māori law as a foundation source of the Aotearoa New Zealand Bachelor of Laws (LLB) degree for the benefit of the legal profession and Aotearoa New Zealand society. We present ten key messages
as integral to this Issues Paper.

text: Inspiring national indigenous legal education for Aotearoa New Zealand's Bachelor of Laws Degree: Phase One This Issues Paper is the result of the first stage of a multi-year, three-phase national project. In it we review the literature and consider some of the preliminary opportunities relevant for the teaching
of Māori law as a foundation source of the Aotearoa New Zealand Bachelor of Laws (LLB) degree for the benefit of the legal profession and Aotearoa New Zealand society. We present ten key messages
as integral to this Issues Paper.

year: 2020-09-01