title: Field trip guide to Oligocene Limestones and Caves in the Waitomo District

authors: Nelson, Campbell S.

abstract: The field guide runs from Hamilton to Waitomo to Te Anga and return in limestone-dominated country developed in transgressive sedimentary deposits of the Oligocene Te Kuiti Group – a world class example of a temperate shelf carbonate depositional system. Attention focuses on the nature, distribution and paleoenvironmental controls of the main limestone facies and some of the mixed terrigenous-carbonate facies in the Group. Along the way features of the Waitomo karst landscape are noted and the trip concludes by going underground in the Ruakuri Cave to discuss cave origins and the evidence for paleoenvironmental changes locked up in speleothems.

text: Field trip guide to Oligocene Limestones and Caves in the Waitomo District The field guide runs from Hamilton to Waitomo to Te Anga and return in limestone-dominated country developed in transgressive sedimentary deposits of the Oligocene Te Kuiti Group – a world class example of a temperate shelf carbonate depositional system. Attention focuses on the nature, distribution and paleoenvironmental controls of the main limestone facies and some of the mixed terrigenous-carbonate facies in the Group. Along the way features of the Waitomo karst landscape are noted and the trip concludes by going underground in the Ruakuri Cave to discuss cave origins and the evidence for paleoenvironmental changes locked up in speleothems.

year: 2013

title: Characterization of synthetic and commercial trisiloxane surfactant materials

authors: Bonnington, L. S.

subjects: organosilicone surfactant

abstract: The organosilicone surfactant Silwet L-77® (L-77), used as an agrochemical adjuvant, is a mixture comprised predominantly of [(CH₃)₃SiO]₂ (CH₃)Si (CH₂)₃ (OCH₂CH₂)n OCH₃ oligomers (n = 3-16, average n  7.5). The commercially available L-77 mixture was purified by reversed-phase high-performance liquid chromatography (HPLC) to obtain individual trisiloxane surfactant components. Pure oligomers (n = 3, 6 and 9) were also synthesized. Synthesis was achieved by hydrosilylation of monomeric ethoxylate monomethyl ether starting reagents. Pure hexa- and nona-ethylene glycols were produced by condensation of smaller oligomers. Atmospheric-pressure ionization mass spectrometry (MS) methods were used to characterize fully the commercial L-77 product and synthesized or isolated components. The application of Fourier-transform ion cyclotron resonance MS and online HPLC-electrospray ionization MS techniques to the analysis of this surfactant are described here. The application of these analytical techniques also enabled elucidation of the synthetic by-products present in the commercial formulation.

text: Characterization of synthetic and commercial trisiloxane surfactant materials The organosilicone surfactant Silwet L-77® (L-77), used as an agrochemical adjuvant, is a mixture comprised predominantly of [(CH₃)₃SiO]₂ (CH₃)Si (CH₂)₃ (OCH₂CH₂)n OCH₃ oligomers (n = 3-16, average n  7.5). The commercially available L-77 mixture was purified by reversed-phase high-performance liquid chromatography (HPLC) to obtain individual trisiloxane surfactant components. Pure oligomers (n = 3, 6 and 9) were also synthesized. Synthesis was achieved by hydrosilylation of monomeric ethoxylate monomethyl ether starting reagents. Pure hexa- and nona-ethylene glycols were produced by condensation of smaller oligomers. Atmospheric-pressure ionization mass spectrometry (MS) methods were used to characterize fully the commercial L-77 product and synthesized or isolated components. The application of Fourier-transform ion cyclotron resonance MS and online HPLC-electrospray ionization MS techniques to the analysis of this surfactant are described here. The application of these analytical techniques also enabled elucidation of the synthetic by-products present in the commercial formulation.

year: 2004

title: Mokena Hou and his wife Rina

authors: Hart, Philip

abstract: Mokena Hou had a distinguished whakapapa, but as nephew to Hou was subordinate to the latter’s son, Karauna Hou. He was born near the Te Aroha hot pools, and his future wife, Rina, who also had illustrious ancestors, including some Ngati Haua, was born in the same area. Both were affiliated to several hapu. After the Hauraki tribes fled from Ngapuhi in 1821, he would be present at the battle of Taumatawiwi in 1830 (though he did not fight) and participated in a later siege of the Ngati Haua pa at Matamata. During the 1830s and later, he mostly cultivated land and dug gum in the lower Waihou region and as well as cultivating at Te Aroha. 
 After living at Kaitawa before the Thames goldfield opened, nearby, in 1867, he moved to Te Aroha, where he would live continuously, warding off the ambitions of Ngati Haua. When the land court investigated the ownership of blocks of land in Hauraki, he sought to obtain as many interests as possible, not always successfully, and tried to get more than his fair share of both land and revenue. 
A devoted Anglican, he assisted the early missionaries to the Waihou region. Wanting peaceful relations with Pakeha, he assisted both the surveying and the settlement of the Aroha Block. When gold was discovered at Te Aroha in 1880, he assisted the prospectors, opened his land for mining and for a township, and invested in some claims, expecting and obtaining a good financial reward. He may have assisted in making the hot pools a public reserve, and certainly gave sections of land within the settlement for public and religious purposes. When he and his wife died a month apart, they were fondly remembered.

text: Mokena Hou and his wife Rina Mokena Hou had a distinguished whakapapa, but as nephew to Hou was subordinate to the latter’s son, Karauna Hou. He was born near the Te Aroha hot pools, and his future wife, Rina, who also had illustrious ancestors, including some Ngati Haua, was born in the same area. Both were affiliated to several hapu. After the Hauraki tribes fled from Ngapuhi in 1821, he would be present at the battle of Taumatawiwi in 1830 (though he did not fight) and participated in a later siege of the Ngati Haua pa at Matamata. During the 1830s and later, he mostly cultivated land and dug gum in the lower Waihou region and as well as cultivating at Te Aroha. 
 After living at Kaitawa before the Thames goldfield opened, nearby, in 1867, he moved to Te Aroha, where he would live continuously, warding off the ambitions of Ngati Haua. When the land court investigated the ownership of blocks of land in Hauraki, he sought to obtain as many interests as possible, not always successfully, and tried to get more than his fair share of both land and revenue. 
A devoted Anglican, he assisted the early missionaries to the Waihou region. Wanting peaceful relations with Pakeha, he assisted both the surveying and the settlement of the Aroha Block. When gold was discovered at Te Aroha in 1880, he assisted the prospectors, opened his land for mining and for a township, and invested in some claims, expecting and obtaining a good financial reward. He may have assisted in making the hot pools a public reserve, and certainly gave sections of land within the settlement for public and religious purposes. When he and his wife died a month apart, they were fondly remembered.

year: 2016