title: Production of ascorbic acid glucoside by alginate-entrapped mycelia of Aspergillus niger

authors: Hsieh, Hsin-Ju

subjects: glucosylation

abstract: The mycelia of Aspergillus niger, cultivated in a medium containing 45 g l⁻¹ maltose, 66 g l⁻¹yeast extract, and 5 g l⁻¹K₂HPO₄ at 30°C and 200 rpm, were used as a biocatalyst in the glucosylation of ascorbic acid. Free mycelia from 3-day-old culture, when used in a 6-h reaction with maltose as the acyl donor, gave 16.07 g l⁻¹ ascorbic acid glucoside corresponding to a volumetric productivity of 2.68 g l⁻¹ h⁻¹ and a conversion of 67%. Mycelia from 3-day-old cultures were entrapped in calcium alginate beads and used as a catalyst in the glucosylation of ascorbic acid. An ascorbic acid-to-maltose molar ratio of 1:9 was found to be optimum, and the conversion reached 75% after 12 h. The concentration of ascorbic acid glucoside produced at this molar ratio was 17.95 g l⁻¹, and the productivity was 1.5 g l⁻¹ h⁻¹. The biocatalyst was repeatedly used in a fixed bed bioreactor for the synthesis of ascorbic acid glucoside and approximately 17 g l⁻¹ of ascorbic acid glucoside corresponding to a volumetric productivity of 1.42 g l⁻¹ h⁻¹ was produced in each use. The conversion was retained at 70% in each use. The entrapped mycelia also exhibited exceptionally high reusability and storage stability. The product was purified to 85% by anion exchange and gel permeation chromatography with a final yield of 75%.

text: Production of ascorbic acid glucoside by alginate-entrapped mycelia of Aspergillus niger The mycelia of Aspergillus niger, cultivated in a medium containing 45 g l⁻¹ maltose, 66 g l⁻¹yeast extract, and 5 g l⁻¹K₂HPO₄ at 30°C and 200 rpm, were used as a biocatalyst in the glucosylation of ascorbic acid. Free mycelia from 3-day-old culture, when used in a 6-h reaction with maltose as the acyl donor, gave 16.07 g l⁻¹ ascorbic acid glucoside corresponding to a volumetric productivity of 2.68 g l⁻¹ h⁻¹ and a conversion of 67%. Mycelia from 3-day-old cultures were entrapped in calcium alginate beads and used as a catalyst in the glucosylation of ascorbic acid. An ascorbic acid-to-maltose molar ratio of 1:9 was found to be optimum, and the conversion reached 75% after 12 h. The concentration of ascorbic acid glucoside produced at this molar ratio was 17.95 g l⁻¹, and the productivity was 1.5 g l⁻¹ h⁻¹. The biocatalyst was repeatedly used in a fixed bed bioreactor for the synthesis of ascorbic acid glucoside and approximately 17 g l⁻¹ of ascorbic acid glucoside corresponding to a volumetric productivity of 1.42 g l⁻¹ h⁻¹ was produced in each use. The conversion was retained at 70% in each use. The entrapped mycelia also exhibited exceptionally high reusability and storage stability. The product was purified to 85% by anion exchange and gel permeation chromatography with a final yield of 75%.

year: 2007

title: Discovering your personality: A group exercise in personal sensemaking

authors: Anderson, Marc Howard

subjects: personality

abstract: Personality affects a wide variety of issues in organizational behavior, human resource management, and strategic management. Instructors teaching personality often have students take personality tests and then give them their scores. This passive approach to giving test feedback suffers from several weaknesses dealing with distinct perceptual biases. The author presents an experiential group exercise that helps overcome these problems and that has a broad range of applications in management and social science courses that discuss personality.

text: Discovering your personality: A group exercise in personal sensemaking Personality affects a wide variety of issues in organizational behavior, human resource management, and strategic management. Instructors teaching personality often have students take personality tests and then give them their scores. This passive approach to giving test feedback suffers from several weaknesses dealing with distinct perceptual biases. The author presents an experiential group exercise that helps overcome these problems and that has a broad range of applications in management and social science courses that discuss personality.

year: 2008

title: The New Zealand psychological society and the Treaty of Waitangi: Proposed implementation plan

authors: National Standing Committee on Bicultural Issues

subjects: Maori

abstract: In August 1993, the National Standing Committee on Bicultural Issues (NSCBI) was asked to prepare an implementation plan for the above Rule 3 for presentation to the Council of the New Zealand Psychological Society. This paper proposes a number of strategies whereby the Society might move towards attaining the goals of Rule 3. This paper has been prepared as a ‘proposed plan’ as the NSCBI believes that ongoing discussion and consultation is necessary to confirm specific directions proposed. In particular, the committee would like to gain feedback from Maori who attend the Hui for Maori in Psychology in February 1995, and from the Society membership generally.

text: The New Zealand psychological society and the Treaty of Waitangi: Proposed implementation plan In August 1993, the National Standing Committee on Bicultural Issues (NSCBI) was asked to prepare an implementation plan for the above Rule 3 for presentation to the Council of the New Zealand Psychological Society. This paper proposes a number of strategies whereby the Society might move towards attaining the goals of Rule 3. This paper has been prepared as a ‘proposed plan’ as the NSCBI believes that ongoing discussion and consultation is necessary to confirm specific directions proposed. In particular, the committee would like to gain feedback from Maori who attend the Hui for Maori in Psychology in February 1995, and from the Society membership generally.

year: 1993