Browsing by Title
Now showing items 7031-7050 of 14645
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Isolation and structure elucidation of secopenitrem D, an indole alkaloid from Penicillium crustosum Thom
(Elsevier, 2010)Chemical investigation of three isolates of Penicillium crustosum Thom cultures, one of which was derived from a recent dog poisoning investigation, has led to the isolation and structure elucidation of secopenitrem D (1). ... -
Isolation and X-ray structure of the platinum(II)–amidate complex cis-[PtCl{N(CO₂Et)C(O)CH₂CN}(PPh₃)₂], an intermediate in the silver(I) oxide-mediated synthesis of a platinalactam complex
(ELSEVIER SCIENCE SA, 2000-01-01)The reaction of cis-[PtCl₂(PPh₃)₂] with one equivalent of N-cyanoacetylurethane, EtO₂CNHC(O)CH₂CN and silver(I) oxide, in dichloromethane at room temperature for short reaction times gives the complex cis-[PtCl{N(CO₂Et)C ... -
Isolation by HPLC and characterisation of the bioactive fraction of New Zealand manuka (Leptospermum scoparium) honey
(Elsevier, 2008)Using HPLC a fraction of New Zealand manuka honey has been isolated, which gives rise to the non-peroxide antibacterial activity. This fraction proved to be methylglyoxal, a highly reactive precursor in the formation of ... -
Isolation from Rhizobium of factors which transfer electrons to soybean nitrogenase
(1973-01)Rhizobium japonicum grown anaerobically with nitrate produced several factors capable of transferring electrons from spinach chloroplasts lacking photosystem II to soybean root nodule nitrogenase. The same organism grown ... -
Isolation of a strain of Bacillus schlegelii from geothermally heated antarctic soil
(Elsevier, 1988)A bacterium capable of growth from 59 to 72° C was isolated from geothermal soil collected from Mount Erebus, Ross Island, Antarctica. The isolate was enriched in medium containing thiosulphate and bicarbonate. Subsequently ... -
Isolation of an extremely thermophilic chemoorganotrophic anaerobe similar to Dictyoglomus thermophilum from New Zealand hot springs
(Springer, 1987)A strain similar to Dictyoglomus thermophilum, isolated from a New Zealand hot spring, is described. This strictly anaerobic, Gram-negative, non-motile and nonsporulating bacterium usually exists as long thin filaments of ... -
Isolation of anaerobic, extremely thermophilic, sulphur metabolising archaebacteria from New Zealand hot springs
(The Royal Society of New Zealand, 1986)Enrichments of New Zealand geo-thermal samples, initiated in anaerobic sulphur-containing media and incubated at temperatures above 85°C, yielded rod and coccal shaped organisms which possessed archaebacterial characteristics. ... -
Isolation of cellulolytic anaerobic extreme thermophiles from New Zealand thermal sites
(American Society for Microbiology, 1987)Avicel enrichment cultures from 47 thermal-pool sites in the New Zealand Rotorua-Taupo region were screened for growth and carboxymethyl cellulase activity at 75°C. Eight anaerobic cellulolytic cultures were obtained. The ... -
Isolation, Characterization and Synthesis of a Phenyl-substituted Pyrrole Isolated from the Flavonoid Fraction of Mānuka Honey
(University of Waikato, 2011)Compound 1, which occurs in the flavonoid fraction of mānuka honey and showed a statistical correlation with the non-peroxide antibacterial activity of the honeys, was extracted from fifteen kilograms of mānuka honey using ... -
Isolation, Structural Determination and Acute Toxicity of Pinnatoxins E, F and G
(American Chemical Society, 2010)Pinnatoxins and pteriatoxins are a group of cyclic imine toxins that have hitherto only been isolated from Japanese shellfish. As with other cyclic imine shellfish toxins, pinnatoxins cause rapid death in the mouse bioassay ... -
Isomerism of Complexes Containing Thiourea Dianion Ligands
(University of Waikato, 2014)This thesis reports the synthesis and characterisation of eight new platinum thiourea complexes. Thiourea dianion complexes of the type (Ph₃P)₂PtSC(=NR)NPh, R=Me, Et, Prⁿ, Prⁱ, Buⁿ and (Ph₃P)₂PtSC(=NPh)NR R=Buͭ , p-tol, ... -
Isonitrile substitution reactions of Co₄(μ₄-SiR)₂(CO)₁₁ clusters and the structure of Co₄(μ₄-SiC₆H₄OMe)₂(CO)₇(XyNC)₄
(Elsevier S.A., 2003-01-01)The substitution of carbonyl ligands by isonitriles on Co₄(μ₄-SiC₆H₄R)₂(CO)₁₁ (R=H, OMe, NMe₂) clusters has been examined. The reactions could be monitored by electrospray ionisation mass spectrometry, identifying the ... -
Isopolyoxometalates derived from arylstibonic acids with "reverse-Keggin ion" structures based on [M(RSb) ₁₂O ₂₈] cores, M = Co(ii) or Zn(ii).
(The Royal Society of Chemistry., 2012)The preparations and structures are described of four new polyoxostibonates, [Co(p-MeC ₆H ₄Sb) ₁₂O ₂₈{Co(H ₂O) ₃} ₄]Cl ₂₋ 6H ₂O, [Co(p-ClC ₆H ₄Sb)₁₂O ₂₈{Co(H ₂O) ₃} ₄]Cl₂₋ 22H ₂O, (PhCH ₂NMe ₃) ₂[Zn(p-ClC ₆H ₄Sb) ₁₂O ₂₈Zn ... -
Isopolyoxometalates of Antimony: Arylstibonic Acids [H₈ (RSb)₁₂O₂₈] and Derived Dodecanuclear Polyoxostibonates [M₂H10−x(RSb)₁₂O₃₀]x−, M = Na or K
(American Chemical Society, 2010)Electrospray ionization mass spectrometry shows arylstibonic acids, p-XC₆H₄SbO₃H₂ (X = methyl, nitro, or chloro), and 1-naphthylstibonic acid exist in MeCN as dodecanuclear aggregates [H₈(RSb)₁₂O₂₈]. With KOH or NaOH these ... -
Isotope Tracing of Long-Term Cadmium Fluxes in an Agricultural Soil
(American Chemical Society, 2017)Globally widespread phosphate fertilizer applications have resulted in long-term increases in the concentration of cadmium (Cd) in soils. The accumulation of this biotoxic, and bioaccumulative metal presents problems for ... -
Isotopic fractionation in a large herbivorous insect, the Auckland tree weta
(Elsevier, 2010)Determining diet and trophic position of species with stable isotopes requires appropriate trophic enrichment estimates between an animal and its potential foods. These estimates are particularly important for cryptic ... -
An issue of terminology: What is digital learning anyway? [Editorial]
(WIlf Malcolm Intitute of Educational Research, 2018)Although invited to guest edit a section/issue on digital technologies, I selected the term ‘digital learning’ to drive this special issue as I hope these two words capture the application of ... -
Issues and Challenges around the fostering of a productive respectful community ethos within an integrated/inclusive class context
(Wilf Malcolm Institute of Educational Research, the University of Waikato, 2017)In teaching and facilitating dance in integrated community contexts, building a community among participants seems critically important. In this context, how are the differing needs of a class managed in order to foster a ... -
Issues and challenges of using web blogs as a medium for research communication.
(Faculty of Education, University of Waikato, 2011)The advent of web-based technology has initially allowed millions of users to get hold of immense information and to communicate worldwide. In the field of education, for example, web-based technology has brought about ... -
Issues facing Southland’s wetlands— recommendations for future management
(2003)This report summarises our experiences and recommendations from a weeklong series of fieldtrips and workshops focused on Southland’s wetlands. Our major recommendations are: • Priorities must be developed for wetland ...
