title: Co-contaminants and factors affecting the sorption behaviour of two sulfonamides in pasture soils

authors: Srinivasan, Prakash

subjects: veterinary antibiotics

abstract: We investigated the effect of soil pH, organic carbon, ionic strength and steroid hormones on the sorption of sulfamethoxazole (SMO) and sulfachloropyridazine (SCP) in three pastoral soils of New Zealand. A model linking sorbate speciation with species-specific sorption coefficients describing the pH dependence of the apparent sorption coefficients was used to derive the fraction of each species of SMO. All soils displayed a decrease in sorption when pH was increased, with SMO exhibiting the highest sorption at pH 2. The cationic form of SMO appeared to sorb more close to pH ≥ pKa1 and, when pH ≥ pKa2 (6.5, 7.5 and 8.5) the anionic species seems to dominate, however, its sorption affinity to all soils was low. SMO sorption was affected by ionic strengths and organic carbon content, while the presence of hormones showed only a subtle decrease in SCP sorption in a selected model pasture soil.

text: Co-contaminants and factors affecting the sorption behaviour of two sulfonamides in pasture soils We investigated the effect of soil pH, organic carbon, ionic strength and steroid hormones on the sorption of sulfamethoxazole (SMO) and sulfachloropyridazine (SCP) in three pastoral soils of New Zealand. A model linking sorbate speciation with species-specific sorption coefficients describing the pH dependence of the apparent sorption coefficients was used to derive the fraction of each species of SMO. All soils displayed a decrease in sorption when pH was increased, with SMO exhibiting the highest sorption at pH 2. The cationic form of SMO appeared to sorb more close to pH ≥ pKa1 and, when pH ≥ pKa2 (6.5, 7.5 and 8.5) the anionic species seems to dominate, however, its sorption affinity to all soils was low. SMO sorption was affected by ionic strengths and organic carbon content, while the presence of hormones showed only a subtle decrease in SCP sorption in a selected model pasture soil.

year: 2013

title: Na yaqona kei na ivakatakilakila vakavanua ena yatu Pasivika (Kava and ethno-cultural identity in Oceania)

authors: Aporosa, S. 'Apo'

subjects: ivakatakilakilavaka

abstract: Garibaldi and Turner (2004, p. 1, 5) explain the role that particular plants play in facilitating the shared ancestry, practices and social experience of an ethnicity. This can include spiritual connections, cultural expression and practice, ceremony, exchange, linguistic reflection, socialisation, medicinal and/or dietary systems. They term these plants ‘cultural keystone species’ and icons of identity, plants that if removed would cause some disruptions to the cultural practices and identity of an ethnic group. Undoubtedly, kava (Piper methysticum) is the cultural keystone species for many Oceanic and Pacific peoples; a “differentiating element of common culture” (Zagefka, 2016, p. 761) informing their ethno-cultural identity. That influence is also extending to new non-Pacific Island user groups who have embraced elements of kava ethno-cultural identity in what has been termed diasporic identity formation in reverse. This chapter will discuss kava with specific reference to ethnic positionality in Fiji, while recognising the tensions from inside and outside the region that support and threaten the continuance of the kava drinking tradition.

text: Na yaqona kei na ivakatakilakila vakavanua ena yatu Pasivika (Kava and ethno-cultural identity in Oceania) Garibaldi and Turner (2004, p. 1, 5) explain the role that particular plants play in facilitating the shared ancestry, practices and social experience of an ethnicity. This can include spiritual connections, cultural expression and practice, ceremony, exchange, linguistic reflection, socialisation, medicinal and/or dietary systems. They term these plants ‘cultural keystone species’ and icons of identity, plants that if removed would cause some disruptions to the cultural practices and identity of an ethnic group. Undoubtedly, kava (Piper methysticum) is the cultural keystone species for many Oceanic and Pacific peoples; a “differentiating element of common culture” (Zagefka, 2016, p. 761) informing their ethno-cultural identity. That influence is also extending to new non-Pacific Island user groups who have embraced elements of kava ethno-cultural identity in what has been termed diasporic identity formation in reverse. This chapter will discuss kava with specific reference to ethnic positionality in Fiji, while recognising the tensions from inside and outside the region that support and threaten the continuance of the kava drinking tradition.

year: 2021

title: Mihi (Foreword)

authors: Tuaupiki, Jackie Whetumarama

abstract: Mihi of Te Kōtihitihi - Ngā Tuhinga Reo Māori Putanga 3

text: Mihi (Foreword) Mihi of Te Kōtihitihi - Ngā Tuhinga Reo Māori Putanga 3

year: 2016