Search results1 – 10 of over 13000
This paper aims to evaluate the separation and purification characteristics of flavonoids from polygonum cuspidatum (PC) extracts by using macroporous adsorption resins …
This paper aims to evaluate the separation and purification characteristics of flavonoids from polygonum cuspidatum (PC) extracts by using macroporous adsorption resins (MAR) mixed bed to improve the utilization rate of flavonoids.
Taking the separation performance of flavonoids as an evaluation index, the best MAR were screened from 31 sorts of MAR and combined the best MAR to form a MAR mixed bed for adsorption and separation of flavonoids.
By studying the separation conditions that affect flavonoids, the results showed that resin LZ-72 has best separation and purification effect on flavonoids under the optimal adsorption and desorption conditions, the purity of the obtained flavonoid compound reaches 82.50%, 2.66 times of the initial extract, and the recovery rate reaches 89.70%. Theoretical research results have shown that the adsorption of flavonoids by MAR conforms to the pseudo-second-order kinetics and Freundlich models.
Because the flavonoids in PC have great medicinal value, the purpose of this work is to develop a method of separating and purifying flavonoids from PC, which will provide a certain foundation for the development of medicine.
This contribution provided a novel way to separate flavonoids from PC. Under the optimal conditions, the content of flavonoids in the product was increased 2.66-fold from 31.01% to 82.50%, and the recovery yield was 89.70%.
Purpose – To examine Gerald Mars’ contribution to scholarly understanding of workplace crime by revisiting his seminal work, Cheats at Work, and to explore developments in…
Purpose – To examine Gerald Mars’ contribution to scholarly understanding of workplace crime by revisiting his seminal work, Cheats at Work, and to explore developments in the forms, patterns, and implications of cheating at work since its publication.
Methodology/approach – This chapter critically reviews Cheats at Work and explores the changing nature of fiddling over time using the analytical framework and four associated occupational categories of workplace crime identified by Mars. The review is based on three main sources: recent scholarly literature on misbehavior, deviance, and employee misconduct; cases from industrial law reports, newspapers, and social media; and the views of informants conveyed directly to the authors.
Findings – The analytical framework that Mars contributed remains useful even if the boundaries of the occupational categories of workplace crime are now more blurred, with some jobs and fiddles spanning categories. Although, technology has changed the nature of fiddling, new forms have emerged as old ones have disappeared.
Social implications – Three decades after publication of Mars's study, it is evident that fiddling remains a normal, albeit covert, activity in many jobs and occupations. His typology continues to be valuable for explaining patterns, forms, and implications of cheating at work.
Originality/value of chapter – Given the growing interest in the forms and implications of misbehavior and workplace resistance, this chapter provides an opportunity for reflection on the enduring salience of Cheats at Work, thirty years after its publication.
The purpose of this study is to focus on the preparation of macroporous adsorption resins (MARs) functionalized with carbazole and N-methylimidazole, and adsorption…
The purpose of this study is to focus on the preparation of macroporous adsorption resins (MARs) functionalized with carbazole and N-methylimidazole, and adsorption behaviors of (–)-epigallocatechin gallate (EGCG) and caffeine (CAF) on the functionalized MARs.
Based on the Friedel–Crafts and amination reactions, novel MARs functionalized with carbazole and N-methylimidazole were synthesized and characterized by the BET method. Accordingly, adsorption behaviors and structure-activity relationships for EGCG and CAF were studied in detail.
The results showed that pseudosecond-order kinetic model was provided with a better correlation for the adsorption of EGCG and CAF onto L-1 and L-2, and pseudofirst-order kinetic model was the most suitable model to illustrate the adsorption process for EGCG and CAF on L-3. The result indicated that Langmuir, Freundlich, Temkin–Pyzhev and Dubinin–Radushkevich isotherms all could better illustrate the adsorption processes of EGCG and CAF on L-1, L-2 and L-3.
This study provides theoretical guidance and technical support for the efficient separation and purification of EGCG and CAF from waste tea leaves by MARs on a large scale. In addition, the results showed that this novel MARs would provide useful help and be used in large-scale production of active ingredients from natural products in the industry and other fields.
Adsorption kinetic models such as pseudofirst-order, pseudosecond-order and intra-particle diffusion kinetic models, and adsorption isotherm models such as Langmuir, Freundlich, Temkin–Pyzhev and Dubinin–Radushkevich isotherms models were adopted to illustrate the adsorption mechanisms of EGCG and CAF. The main driving forces for MARs with no functional groups were pore sieving effects, p–p conjugation effects and hydrophobic interactions, and the other significant driving forces for MARs functionalized with carbazole and N-methylimidazole were electrostatic interactions, ion-dipole and hydrogen bonding interactions. This study might provide scientific references and useful help for large-scale separating and enriching active ingredients in natural products using the technology of MARs with special functional groups.
Presents over sixty abstracts summarising the 1999 Employment Research Unit annual conference held at the University of Cardiff. Explores the multiple impacts of…
Presents over sixty abstracts summarising the 1999 Employment Research Unit annual conference held at the University of Cardiff. Explores the multiple impacts of globalization on work and employment in contemporary organizations. Covers the human resource management implications of organizational responses to globalization. Examines the theoretical, methodological, empirical and comparative issues pertaining to competitiveness and the management of human resources, the impact of organisational strategies and international production on the workplace, the organization of labour markets, human resource development, cultural change in organisations, trade union responses, and trans‐national corporations. Cites many case studies showing how globalization has brought a lot of opportunities together with much change both to the employee and the employer. Considers the threats to existing cultures, structures and systems.
Assuming that the relations between the Local Authority and their Public Analyst are, as regards fixity of tenure, established on a satisfactory basis, there remain some very important points to be discussed, namely, the duties of that officer, the conditions under which he works, and his relations to his colleagues on the staff. These are matters which, so far as we know, have never previously been dealt with in print, are only partially regulated by law, and are not settled by any uniformity of practice on the part of Local Authorities.
Considers the quality of service between internal partners within a company looking at how this can influence performance and quality. Looks at the different ways of…
Considers the quality of service between internal partners within a company looking at how this can influence performance and quality. Looks at the different ways of defining the internal customer and suggests that measurement is most effective when complex procedures are broken down. States that internal marketing is a critical issue facing marketing professions, human resources and other executives. Argues that if poor service is provided between employees it is unlikely that good service will ultimately be provided to the external customer. Invites further research in this area.
Recommended for MBAs, this case is one of a pair of cases used in a merger negotiation exercise. It is designed to be used with “Mars, Incorporated” (UVA-F-1612), but it can also be used on its own. Half of the class prepares only the Wrigley case and the other half uses the Mars case.
Wrigley and Mars are in the process of negotiating a merger agreement. Macroeconomic assumptions—particularly forecasting future sugar prices in an uncertain environment—and assumptions about Wrigley's value make Wrigley's future cash flows difficult to predict.
The purpose of this study is to examine the aspects of the Pokémon GO game that influenced travelers to use the app, and to pinpoint aspects of the mobile augmented…
The purpose of this study is to examine the aspects of the Pokémon GO game that influenced travelers to use the app, and to pinpoint aspects of the mobile augmented reality (MAR) game that can memorably engage with them like a travel guide and influence individual traveler experience during and after usage. This current study specifically focused on examining the behavioral intentions to use the MAR app as a travel guide in the future.
Descriptive methods were used, with a target population for this study consisting of smartphone users who had downloaded Pokémon GO and had played the game. An exponential non-discriminative sample, snowball sampling method, was chosen by selecting a group of respondents who have played the game and using those to help identify other respondents in the target population who have played the game. A 15-item survey instrument drawing from industry insights and academic literature was created for the purpose of the study.
The number of downloads, length of usage and frequency of game play declined between the months of July and September. However, a 71 per cent majority of surveyed respondents still had the app on their smartphone at the time of the study. The Pokémon GO app offered all four realms of experiences – educational, entertainment, esthetic and escapist – and enhanced the overall user experience. This study revealed that a majority (77 per cent) of the respondents would be interested in using Pokémon GO as a travel guide. Furthermore, a majority (73 per cent) of respondents stated that they would be interested in using an MAR game as a travel guide in the future.
For all its interaction with the real world, Pokémon GO is still just an early version of an MAR app, and does not offer a fully immersive and interactive AR experience. The study used snowball sampling due to its exploratory and may not be able to guarantee the representative nature of the sample. Concerning the research method used, such methods were necessary for a review of an existing MAR app as a travel guide to further fill some gaps in literature.
This study bridged the gap between theory and practice by offering key insights specifically into customers’ intentions to use the Pokémon GO game or other customized MAR game as a travel guide in the hospitality and tourism industry. Pokémon GO and similar MAR games could potentially change the way destinations are marketed in the tourism industry. This current study pinpointed five exploitable qualities of MAR technology and how hospitality and tourism businesses can use them to tap into this new global and social phenomenon.
Pokémon GO and similar MAR games bring people together. In fact, unlike social media, where users are spending significant amounts of time just browsing without posting or interacting with others, MAR games create face-to-face interactions. MAR games enhance real-life social interaction, which might signify a social media trend back toward real world networking and meeting with friends.
Since the early 2000s, several qualitative and a few quantitative studies have been done to explore (MAR) applications as a travel guide; however, none of them have reviewed a MAR game app that can be offered as a travel guide. That makes this a pioneer study, investigating an existing MAR app that was not created with this use in mind and examining the intentions to use it as a travel guide.
Defines “insider trading” and looks at the effects of insider trading on an economy. Considers the factors which have caused legislation and the rationale behind insider…
Defines “insider trading” and looks at the effects of insider trading on an economy. Considers the factors which have caused legislation and the rationale behind insider trading. Compares the economic and financial approaches to the problem. Outlines the European, UK and US positions covering legislation, arguments, prohibitions and penalties. Cites important cases in the USA, which have caused changes in the law. Concludes that there is a need for standardization, together with better access to timely information but highlights that the markets require freedom within which to work effectively and accepts that there will always be an element of insider trading in any market.
Gives an in depth view of the strategies pursued by the world’s leading chief executive officers in an attempt to provide guidance to new chief executives of today…
Gives an in depth view of the strategies pursued by the world’s leading chief executive officers in an attempt to provide guidance to new chief executives of today. Considers the marketing strategies employed, together with the organizational structures used and looks at the universal concepts that can be applied to any product. Uses anecdotal evidence to formulate a number of theories which can be used to compare your company with the best in the world. Presents initial survival strategies and then looks at ways companies can broaden their boundaries through manipulation and choice. Covers a huge variety of case studies and examples together with a substantial question and answer section.