title: Using Twitter in an Indigenous language: An analysis of te reo Māori tweets

authors: Keegan, Te Taka Adrian Gregory

abstract: Language revitalization theory suggests that one way to improve the health of a language is to increase the number of domains where the language is used. Social network platforms provide a variety of domains where indigenous- language communities are able to communicate in their own languages. Although the capability exists, is social networking being used by indigenous- language communities? This paper reports on one particular social networking platform, Twitter, by using two separate methodologies. First, Twitter statistics collated from the Indigenous Tweets website are analysed. The data show that languages such as Basque, Haitian Creole, Welsh, Irish Gaelic, Frisian and Kapampangan do have a presence in the “Twittersphere”. Further analysis for te reo Māori (the Māori language) shows that tweets in te reo Māori are rising and peak when certain events occur. The second methodology involved gathering empirical data by tweeting in te reo Māori. This served two purposes: it allowed an ancillary check on the validity of the Indigenous Tweets data and it allowed the opportunity to determine if the number of indigenous- language tweets could be influenced by the actions of one tweeter.

text: Using Twitter in an Indigenous language: An analysis of te reo Māori tweets Language revitalization theory suggests that one way to improve the health of a language is to increase the number of domains where the language is used. Social network platforms provide a variety of domains where indigenous- language communities are able to communicate in their own languages. Although the capability exists, is social networking being used by indigenous- language communities? This paper reports on one particular social networking platform, Twitter, by using two separate methodologies. First, Twitter statistics collated from the Indigenous Tweets website are analysed. The data show that languages such as Basque, Haitian Creole, Welsh, Irish Gaelic, Frisian and Kapampangan do have a presence in the “Twittersphere”. Further analysis for te reo Māori (the Māori language) shows that tweets in te reo Māori are rising and peak when certain events occur. The second methodology involved gathering empirical data by tweeting in te reo Māori. This served two purposes: it allowed an ancillary check on the validity of the Indigenous Tweets data and it allowed the opportunity to determine if the number of indigenous- language tweets could be influenced by the actions of one tweeter.

year: 2015

title: Kia mate rā anō a Tama-nui-te-rā: reversing language shift in Kōhanga reo

authors: Skerrett White, Mere Ngāutauta

abstract: This thesis focuses on reversing language shift (RLS) efforts via the revernacularisation of te reo Māori (the Māori language) in Te Amokura Kōhanga Reo (Māori language nest). J. Fishman’s (2001a) graded intergenerational disruption scale (GIDS), and M. Durie’s (2001, 2003) discussions on Māori educational advancement provide conceptual frameworks for the meaning-making, cultural and symbolic relationships of language to culture and identity (Fishman, 1996). This qualitative case study involves three young children and their families who are committed to the intergenerational transmission of te reo Māori, the threatened indigenous heritage language of Aotearoa/New Zealand. Observational data was analysed illustrating these bilingual, biliterate, bicultural, bicognitive and bilateral children and their use of sophisticated language for increasingly complex purposes. This study identifies how children’s learning dispositions for shared reference with adults (who are active listeners and thoughtful speakers in meaningful activities [Carr, M., 2000, 2001]) are part of the deep structure of a unique cultural context successfully supporting language revernacularisation. In addition the study develops critical insights into how RLS can be viewed as the linguistic arm for furthering Māori aspirations of tino rangatiratanga (Bishop, R., 1997a; Bishop R., & Glynn, T., 1999) and has further implications for language planning, pedagogy and praxis in Kōhanga Reo.

text: Kia mate rā anō a Tama-nui-te-rā: reversing language shift in Kōhanga reo This thesis focuses on reversing language shift (RLS) efforts via the revernacularisation of te reo Māori (the Māori language) in Te Amokura Kōhanga Reo (Māori language nest). J. Fishman’s (2001a) graded intergenerational disruption scale (GIDS), and M. Durie’s (2001, 2003) discussions on Māori educational advancement provide conceptual frameworks for the meaning-making, cultural and symbolic relationships of language to culture and identity (Fishman, 1996). This qualitative case study involves three young children and their families who are committed to the intergenerational transmission of te reo Māori, the threatened indigenous heritage language of Aotearoa/New Zealand. Observational data was analysed illustrating these bilingual, biliterate, bicultural, bicognitive and bilateral children and their use of sophisticated language for increasingly complex purposes. This study identifies how children’s learning dispositions for shared reference with adults (who are active listeners and thoughtful speakers in meaningful activities [Carr, M., 2000, 2001]) are part of the deep structure of a unique cultural context successfully supporting language revernacularisation. In addition the study develops critical insights into how RLS can be viewed as the linguistic arm for furthering Māori aspirations of tino rangatiratanga (Bishop, R., 1997a; Bishop R., & Glynn, T., 1999) and has further implications for language planning, pedagogy and praxis in Kōhanga Reo.

year: 2003

title: The Molecular Weight Characterisation of Pinus radiata Bark Condensed Tannins

authors: Bogun, Ben Rowan

subjects: condensed tannins

abstract: Crude condensed tannins extracted from Pinus radiata bark (sourced from Tokoroa) with various solvents (Hot water (HW), methanol/water/acetic acid (MWA), acetone/water (AW) and hot aqueous 2% sulphite/urea solution (SFU)) were subjected to Sephadex LH-20 column chromatography to purify the condensed tannins by removing carbohydrate and flavonoid components (crude extracts were approximately 70% condensed tannins). The condensed tannins from the HW and MWA extractions were then fractionated on a Sephadex LH-20 column using a stepwise gradient of methanol, water and acetone to separate the condensed tannins according to molecular weight (MW).  Fractions were collected and pooled to give eight final fractions (HW 1-8 and MWA 1-8). Purified and fractionated condensed tannin fractions were then analysed with a range of techniques including 1H nuclear magnetic resonance (NMR) spectroscopy, acid/phloroglucinol depolymerisation coupled with high performance liquid chromatography (HPLC) with UV and MS detection, matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS), electrospray ionisation mass spectrometry (ESI-MS) and gel permeation chromatography (GPC).
 
In the MALDI-TOF MS spectrum of the crude extracts the most intense signal was typically the tetramer peak and the decamer was typically the largest oligomer detected.  In the spectra of late-eluting column fractions (i.e. HW and MWA 5-7) oligomers greater than the nonamer (DP up to 14) were detected and the most intense signal was shifted from the tetramer to higher MW oligomers. ESI MS showed itself to be better at analysing small MW condensed tannins. The MS results demonstrated that prior separation of the condensed tannins was effective in improving MS detection of higher MW oligomers. 

The mDP of the crude and fractionated fractions was obtained by depolymerisation/HPLC. The mean degree of polymerisation (mDP) of the purified condensed tannins ranged between 7.3 (AW) and 9.2 (SFU).  The mDP of the fractionated condensed tannins ranged between 2 and 18. The depolymerisation/HPLC results of the fractionated condensed tannins were used to construct a GPC calibration curve of condensed tannin MW versus GPC retention time. To identify the GPC dimer peak a procyanidin dimer was synthesised by reacting condensed tannins with catechin under acidic conditions. Through the use of various NMR techniques (DEPT135, COSY, HSQC and HMBC experiments) the synthetic dimer was characterised and the 1H and 13C NMR spectra fully assigned.  The GPC calibration curve enabled MW profiles for the HW and MWA 2-8 fractions and crude extracts to be obtained. GPC analysis confirmed the presence of larger oligomers that were not detected by MALDI-TOF MS and ESI MS.  GPC number average MW results were in agreement with the average MW results obtained from depolymerisation/HPLC results.

Pinus radiata bark condensed tannins from two different geographical locations (Golden Downs (Nelson) and Waimate (South Canterbury)) and different tree heights (0, 10 and 20 m) were analysed using the techniques described above to discover if there was any variability between samples.  Trends that were observed between the different condensed tannins were decreases in condensed tannin yield and mDP as bark was obtained from higher up a tree.  Extracts from New Zealand native bark (totara, rimu and kauri) were also analysed, showing that Rimu was the only bark of these species that contained significant amounts of condensed tannins. Overall this research has provided additional information on the structure and MW of P. radiata condensed tannins.

text: The Molecular Weight Characterisation of Pinus radiata Bark Condensed Tannins Crude condensed tannins extracted from Pinus radiata bark (sourced from Tokoroa) with various solvents (Hot water (HW), methanol/water/acetic acid (MWA), acetone/water (AW) and hot aqueous 2% sulphite/urea solution (SFU)) were subjected to Sephadex LH-20 column chromatography to purify the condensed tannins by removing carbohydrate and flavonoid components (crude extracts were approximately 70% condensed tannins). The condensed tannins from the HW and MWA extractions were then fractionated on a Sephadex LH-20 column using a stepwise gradient of methanol, water and acetone to separate the condensed tannins according to molecular weight (MW).  Fractions were collected and pooled to give eight final fractions (HW 1-8 and MWA 1-8). Purified and fractionated condensed tannin fractions were then analysed with a range of techniques including 1H nuclear magnetic resonance (NMR) spectroscopy, acid/phloroglucinol depolymerisation coupled with high performance liquid chromatography (HPLC) with UV and MS detection, matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS), electrospray ionisation mass spectrometry (ESI-MS) and gel permeation chromatography (GPC).
 
In the MALDI-TOF MS spectrum of the crude extracts the most intense signal was typically the tetramer peak and the decamer was typically the largest oligomer detected.  In the spectra of late-eluting column fractions (i.e. HW and MWA 5-7) oligomers greater than the nonamer (DP up to 14) were detected and the most intense signal was shifted from the tetramer to higher MW oligomers. ESI MS showed itself to be better at analysing small MW condensed tannins. The MS results demonstrated that prior separation of the condensed tannins was effective in improving MS detection of higher MW oligomers. 

The mDP of the crude and fractionated fractions was obtained by depolymerisation/HPLC. The mean degree of polymerisation (mDP) of the purified condensed tannins ranged between 7.3 (AW) and 9.2 (SFU).  The mDP of the fractionated condensed tannins ranged between 2 and 18. The depolymerisation/HPLC results of the fractionated condensed tannins were used to construct a GPC calibration curve of condensed tannin MW versus GPC retention time. To identify the GPC dimer peak a procyanidin dimer was synthesised by reacting condensed tannins with catechin under acidic conditions. Through the use of various NMR techniques (DEPT135, COSY, HSQC and HMBC experiments) the synthetic dimer was characterised and the 1H and 13C NMR spectra fully assigned.  The GPC calibration curve enabled MW profiles for the HW and MWA 2-8 fractions and crude extracts to be obtained. GPC analysis confirmed the presence of larger oligomers that were not detected by MALDI-TOF MS and ESI MS.  GPC number average MW results were in agreement with the average MW results obtained from depolymerisation/HPLC results.

Pinus radiata bark condensed tannins from two different geographical locations (Golden Downs (Nelson) and Waimate (South Canterbury)) and different tree heights (0, 10 and 20 m) were analysed using the techniques described above to discover if there was any variability between samples.  Trends that were observed between the different condensed tannins were decreases in condensed tannin yield and mDP as bark was obtained from higher up a tree.  Extracts from New Zealand native bark (totara, rimu and kauri) were also analysed, showing that Rimu was the only bark of these species that contained significant amounts of condensed tannins. Overall this research has provided additional information on the structure and MW of P. radiata condensed tannins.

year: 2007