title: Isolation and structure determination of two new hydrophobic microcystins from Microcystis sp. (CAWBG11)

authors: Puddick, Jonathan

subjects: Microcystis sp. CAWBG11

abstract: Two new hydrophobic microcystins, microcystin-FA (1) and microcystin-WA (2), were isolated from the cyanobacterium Microcystis sp. (CAWBG11). The structures were deduced using one- and two-dimensional nuclear magnetic resonance spectroscopy and tandem mass spectrometry. The absolute stereochemistry of the amino acid residues in 1 and 2 was determined using the Advanced Marfey's method.

text: Isolation and structure determination of two new hydrophobic microcystins from Microcystis sp. (CAWBG11) Two new hydrophobic microcystins, microcystin-FA (1) and microcystin-WA (2), were isolated from the cyanobacterium Microcystis sp. (CAWBG11). The structures were deduced using one- and two-dimensional nuclear magnetic resonance spectroscopy and tandem mass spectrometry. The absolute stereochemistry of the amino acid residues in 1 and 2 was determined using the Advanced Marfey's method.

year: 2013

title: The phenology of an enclosed pasture area with specific reference to the soil-vegetation interface

authors: Rosenberg, David Ronald

abstract: Over a seven year period (1966-1972) a systematic survey was made of an enclosed pasture area on the campus of the University of Waikato, Hamilton, New Zealand. Areas of similar soil type and floral composition were used for comparison at Newstead and Tamahere. Comparisons are made with shorter-term studies at Newstead and in other countries.

None of the three sites had fertiliser applied during the survey period. Apart from sampling procedures, no vegetation was removed from Hillcrest, but Newstead and Tamahere were subjected to systematic mowing.

Seasonal and long-term fluctuations of populations were determined for all major faunal groups, together with seasonal and successional development of the flora.

Relationships between meteorological factors, faunal and floral composition have been subjected to computer analysis. Some correlations are suggested. The emphasis in the survey has been upon the fluctuations and relationships of groups rather than the precise responses of individual species to environmental variations.

Feeding experiments with fauna in the laboratory have helped to add to the knowledge of the trophic position of some New Zealand species.

The results of the survey show the effects of floral competition where Holcus lanatus, Bromus unioloides and Ranunculus sardous replace rosette and soft annual plants. The rate and sequence of succession are shown.

An adaptation of the Berlese extractor was developed to give indications of the vertical distribution of fauna.

Long term change in faunal composition are not clearly indicated. Changes which do occur are mostly at the soil surface, reflecting the state of vegetation and litter.

As a result of the extended survey, it would seem that one of the most important influences in the ecology of light loam agricultural pastures is the quality of the soil/vegetation interface. When a litter layer is retained throughout the year, faunal numbers fluctuate less rapidly and to a lesser extent than in exposed short vegetation pastures. Basically, litter acts as an ecological buffer, dampens down extremes of microclimate change, and provides a greater number of niches for soil microfauna. Where vegetation removal does not occur, small low-growing plants and seedlings are suppressed. The smothering effects of the stems and leaves from taller plants maintain the dominance of perennial species.

text: The phenology of an enclosed pasture area with specific reference to the soil-vegetation interface Over a seven year period (1966-1972) a systematic survey was made of an enclosed pasture area on the campus of the University of Waikato, Hamilton, New Zealand. Areas of similar soil type and floral composition were used for comparison at Newstead and Tamahere. Comparisons are made with shorter-term studies at Newstead and in other countries.

None of the three sites had fertiliser applied during the survey period. Apart from sampling procedures, no vegetation was removed from Hillcrest, but Newstead and Tamahere were subjected to systematic mowing.

Seasonal and long-term fluctuations of populations were determined for all major faunal groups, together with seasonal and successional development of the flora.

Relationships between meteorological factors, faunal and floral composition have been subjected to computer analysis. Some correlations are suggested. The emphasis in the survey has been upon the fluctuations and relationships of groups rather than the precise responses of individual species to environmental variations.

Feeding experiments with fauna in the laboratory have helped to add to the knowledge of the trophic position of some New Zealand species.

The results of the survey show the effects of floral competition where Holcus lanatus, Bromus unioloides and Ranunculus sardous replace rosette and soft annual plants. The rate and sequence of succession are shown.

An adaptation of the Berlese extractor was developed to give indications of the vertical distribution of fauna.

Long term change in faunal composition are not clearly indicated. Changes which do occur are mostly at the soil surface, reflecting the state of vegetation and litter.

As a result of the extended survey, it would seem that one of the most important influences in the ecology of light loam agricultural pastures is the quality of the soil/vegetation interface. When a litter layer is retained throughout the year, faunal numbers fluctuate less rapidly and to a lesser extent than in exposed short vegetation pastures. Basically, litter acts as an ecological buffer, dampens down extremes of microclimate change, and provides a greater number of niches for soil microfauna. Where vegetation removal does not occur, small low-growing plants and seedlings are suppressed. The smothering effects of the stems and leaves from taller plants maintain the dominance of perennial species.

year: 1974

title: Māori women and intimate partner violence: Some sociocultural influences

authors: Hoeata, Chloe

subjects: intimate partner violence

abstract: Intimate partner violence (IPV) has recently been acknowledged as a worldwide phenomenon, with approximately one in four intimate relationships containing some form of violence. This study explores the interaction between relationship dynamics, IPV and whānau and community influences. We completed narrative interviews with two Māori women in December 2010. Our findings confirm the results of earlier studies which have found that childhood experiences of violence, actual or witnessed, have a powerful effect that reverberate within adult lives and into the formation of intimate relationships. Our interviews show that Māori whānau and women are textured by the same patriarchal expectations that privilege men in the Pākehā world. We also found that seeking help from whānau to escape a violent relationship may not be the most welcomed course of action. We conclude with a discussion of future research directions.

text: Māori women and intimate partner violence: Some sociocultural influences Intimate partner violence (IPV) has recently been acknowledged as a worldwide phenomenon, with approximately one in four intimate relationships containing some form of violence. This study explores the interaction between relationship dynamics, IPV and whānau and community influences. We completed narrative interviews with two Māori women in December 2010. Our findings confirm the results of earlier studies which have found that childhood experiences of violence, actual or witnessed, have a powerful effect that reverberate within adult lives and into the formation of intimate relationships. Our interviews show that Māori whānau and women are textured by the same patriarchal expectations that privilege men in the Pākehā world. We also found that seeking help from whānau to escape a violent relationship may not be the most welcomed course of action. We conclude with a discussion of future research directions.

year: 2011