Fruit ripening/scald relationship in apple

The ripening stage of apple fruits at harvest is the main factor influencing fruit quality during the cold storage period that lasts several months and give rise to physiological disorders in fruits of susceptible cultivars. In particular, superficial scald is connected to α-farnesene oxidation, leading to fruit browning. Therefore, the assessment of the optimal ripening stage at harvest is considered to be crucial to control the overall quality, the length of storage life and the scald incidence. However, the maturity indexes traditionally used in the horticultural practice do not strictly correlate with fruit maturity, and do not account for the variability occurring in the field. Hence, the present work focused on the determination of apple fruit ripening with the use of an innovative, non-destructive device, the DA-meter. The study was conducted on ‘Granny Smith’ and ‘Pink Lady’ cultivars, which differ in scald susceptibility. Pre- and post- harvest ripening behavior of the fruits was studied, and the influence of ripening stage and treatments with 1-MCP were evaluated in relation to scald development and related metabolites. IAD was shown to be a reliable indicator of apple ripening, allowing cultivar-specific predictions of the optimal harvest time in different growing seasons. IAD may also be employed to segregate apple fruits in maturity classes, requiring different storage conditions to control flesh firmness reduction and scald incidence. Moreover, 1-MCP application is extremely effective in reducing superficial scald, and its effect is influenced by fruit ripening stage reached at harvest. However, the relation between ethylene and α-farnesene was not entirely elucidated. Thus, ethylene can be involved in other oxidative processes associated with scald besides α-farnesene regulation.

Understanding of stuck fermentations : investigations on the relationship between the microbial diversity and chemical composition of must

Das Ziel dieser Arbeit war es, mehr Informationen über unkonventionelle Gründe für Gärstockungen zu gewinnen und neue Wege zu finden, diese zu überwinden. Mikrobielle Sukzession und die chemische Zusammensetzung bei der Gärung wurden in zwei aufeinander folgenden Jahren in einem Weingut von der oberen Mosel in Deutschland studiert. Es gab keinen Hinweis darauf, dass die isolierten Bakterienspezies oder chemischen Komponenten von Most und Jungwein an schleppenden oder stockenden Gärungen beteiligt waren. Ferner konnte während dieser Arbeit gezeigt werden, dass Saccharomyces bayanus die dominierende Weinhefe in diesem Weingut war statt der klassischen und bekannten Weinhefe Saccharomyces cerevisiae. Während der Gärstockung konnte ein Dreifach-Hybrid Saccharomyces cerevisiae x Saccharomyces kudriavzevii x Saccharomyces bayanus wachsen, Saccharomyces bayanus ersetzen und die Gärung beenden. Beide isolierten Hefestämme Saccharomyces bayanus Stamm HL 77 und der Dreifach-Hybrid Saccharomyces cerevisiae x Saccharomyces kudriavzevii x Saccharomyces bayanus Stamm HL 78 konnten Glucose und Fructose von Anfang an verwerten und konnten bei niedrigen Temperaturen von 15 °C und in der Abwesenheit von Hefe-verwertbarem Stickstoff in Form von Ammonium wachsen, solange Aminosäuren im Medium vorhanden waren, im Gegensatz zu einer kommerziellen Saccharomyces cerevisiae-Starterkultur. Chemische Untersuchungen ergaben, dass Hefe-verwertbarer Stickstoff in dem kooperierenden Weingut mit einem Maximum von 160 mg/l zu Beginn der Gärung vorhanden war und auf 40 mg/L verringert war nach zwei Wochen. Aus diesem Grund sind beide isolierten Hefestämme interessant als Starterkulturen in diesem Weingut und dies kann neben der niedrigen Temperatur im Keller auch ein Grund sein, warum Saccharomyces cerevisiae nicht die dominierende Weinhefe in diesem Fall ist. Der Dreifach-Hybrid Saccharomyces cerevisiae x Saccharomyces kudriavzevii x Saccharomyces bayanus Stamm HL 78 ist in der Lage, Fructose noch effizienter zu nutzen als Saccharomyces bayanus Stamm HL 77 und ist weniger abhängig von der Aminosäurekonzentration. Dieser Stamm wurde bereits erfolgreich bei diesem Projekt eingesetzt, um eine Gärstockung in dem kooperierenden Weingut zu beheben. Es ist bekannt, dass Saccharomyces-Hybride in der Weinherstellung vorkommen aber ihre Rolle bei der Überwindung von Gärstockungen wurde bisher noch nicht beschrieben. Diese Ergebnisse sind nützlich, um Gärstockungen zu vermeiden oder zu überwinden mit der selektiven Verwendung dieser Hefestämme in verschiedenen Stadien der Gärung. Das kooperierende Weingut, welches im oberen Qualitätssegment platziert ist, hatte jedes Jahr Probleme mit Gärstockungen. Daher ist die Anwendung der Dreifach-Hybriden Saccharomyces cerevisiae x Saccharomyces kudriavzevii x Saccharomyces bayanus Stamm HL 78 eine große Chance, Gärstockungen und finanzielle Verluste ohne kommerzielle Starterkulturen oder andere übliche Praktiken, die zu einer Veränderung des Aromaprofils führen können, zu vermeiden. Die beschriebenen Untersuchungen stellen ein Modell dar, um Gärstockungen auch in anderen Weingütern, die Spontangärungen anwenden, zu überwinden.

The World Trade Organization at Work: Performance in a Member-Driven Milieu

This article discusses performance in the context of the World Trade Organization (WTO). Applying the framework by Gutner and Thompson and inspired by principal-agent theory, it is argued that existing studies have underspecified the institutional milieu that affects performance. The WTO represents a member-driven organization where Members are part of the international organization (IO) (e.g., through rule-making) and at the same time act outside the IO (e.g., through implementation). Thus, a narrow reading of the IO (focusing on the civil servants and the Director-General and his staff) will not suffice to understand IO performance in the WTO context. Selected evidence is presented to illustrate aspects of the WTO’s inner-working and the institutional milieu of performance. In addition, the article discusses a number of performance parameters, including the relationship between Secretariat autonomy and performance, the role of information, and the mechanisms of performance aggregation. The article ends by cautioning against quick fixes to the system to improve performance.

Relationships Past and Present: Examining the Impact of One's Relationship with His/her Opposite-sex Parent on His/her Attitudes Toward and Engagement in Hookup Culture

Hooking up has become a common and public practice on university campuses across the country. While much research has determined who is doing it, with whom they are doing it, and what they are hoping to get out of it, little work has been done to determine what personal factors motivate students to participate in the culture. A total of 407 current students were surveyed to assess the impact of one’s relationship with his/her opposite-sex parent on his/her attitudestoward and engagement in hookup culture on campus. Scores were assigned to the participants to divide them into categories of high and low attachment with their parent. It was hypothesizedthat heterosexual students who do not perceive themselves as having a strong, close, positive relationship with their opposite-sex parent would be more likely to engage in or attempt to engage in casual sexual behavior. This pattern was expected to be strongest for women on campus. Men and women differed in their reasons for hooking up, with whom they hook up, to what they attribute the behaviors of their peers, and what they hope to gain from their sexual interactions. Effects of parent-child relationships were significant only for women who reported hooking up because “others are doing it,” men’s agreement with the behavior of their peers, and women’s overall satisfaction with their hookups. Developmental, social, and evolutionary perspectives are employed to explain the results. University status was determined to be most telling of the extent to which a student is engaged in hookup culture.

Reading Readings: An Approach to the Relationship between Television and Literature at School

The main problem addressed by this research was that of what are the relations between TV viewing at home and studying literature at school, and how an adequate position on this can be reached. As well as the theoretical background, it involved an experimental study with classes of second and sixth grade students, discussing and observing their reactions to and interpretations of a number of animated cartoons. The work is divided into four parts - Is there a Class in this Text?, Stories of Reading, Narratives of Animation and Animation of Narratives, and The (Three) Unrepeatable (Pigs). Beginning, Middle End - which examine the tensions between the "undiscriminating sequence" of the televisual flow and a way of "thinking", "making" and "doing" education that presupposes a fundamental belief in possible re-productions, copies unescaping, following the original, or competing. The work focuses on animated cartoons, seeing them not merely as a part of the flow of television, but as an allegory of reading this flow, of the flow within the flow itself. What they question - "identity", "end", "followability" - is what is most important to teaching. Thus the interest in the metamorphoses of animated films is an interest in the tensions which their "strange law/flow" introduces into the field of teaching - this totally forbidden place of saying everything.

Cellular and immunological basis of the host-parasite relationship during infection with Neospora caninum

Neospora caninum is an apicomplexan parasite that is closely related to Toxoplasma gondii, the causative agent of toxoplasmosis in humans and domestic animals. However, in contrast to T. gondii, N. caninum represents a major cause of abortion in cattle, pointing towards distinct differences in the biology of these two species. There are 3 distinct key features that represent potential targets for prevention of infection or intervention against disease caused by N. caninum. Firstly, tachyzoites are capable of infecting a large variety of host cells in vitro and in vivo. Secondly, the parasite exploits its ability to respond to alterations in living conditions by converting into another stage (tachyzoite-to-bradyzoite or vice versa). Thirdly, by analogy with T. gondii, this parasite has evolved mechanisms that modulate its host cells according to its own requirements, and these must, especially in the case of the bradyzoite stage, involve mechanisms that ensure long-term survival of not only the parasite but also of the host cell. In order to elucidate the molecular and cellular bases of these important features of N. caninum, cell culture-based approaches and laboratory animal models are being exploited. In this review, we will summarize the current achievements related to host cell and parasite cell biology, and will discuss potential applications for prevention of infection and/or disease by reviewing corresponding work performed in murine laboratory infection models and in cattle.

Arctic network builders : the Arctic Coal Company's operations on Spitsbergen and its relationship with the environment

In 1906, two American industrialists, John Munroe Longyear and Frederick Ayer, formed the Arctic Coal Company to make the first large scale attempt at mining in the high-Arctic location of Spitsbergen, north of the Norwegian mainland. In doing so, they encountered numerous obstacles and built an organization that attempted to overcome them. The Americans sold out in 1916 but others followed, eventually culminating in the transformation of a largely underdeveloped landscape into a mining region. This work uses John Law’s network approach of the Actor Network Theory (ANT) framework to explain how the Arctic Coal Company built a mining network in this environmentally difficult region and why they made the choices they did. It does so by identifying and analyzing the problems the company encountered and the strategies they used to overcome them by focusing on three major components of the operations; the company’s four land claims, its technical system and its main settlement, Longyear City. Extensive comparison between aspects of Longyear City and the company’s choices of technology with other American examples place analysis of the company in a wider context and helps isolate unique aspects of mining in the high-Arctic. American examples dominate comparative sections because Americans dominated the ownership and upper management of the company.

Work in Progress: Social Work, the State and Europe

Social work has had varying relationships with the nation state both over time and between different countries. From its early stages the occupation had both state sanctioned and voluntary streams. Its international dimension has been enhanced in the European context through policy and funding measures over the past few decades. During this period we have also seen the rise of globalising trends leading to questions about the ongoing powers of nation states. This paper examines some aspects of the relationship between social work and the state, taking into account the emergence of European and also international policies and frameworks. The paper focuses initially on migration as an example of a common trend; an area of policy with both national and European dimensions; and a field in which social professionals are engaged to varying degrees. Secondly, it considers the progress of the ‘professional project’ in Europe, using developments in five countries to illustrate some of the issues associated with ‘professionalization’. European and international frameworks may lead to some convergence in national understandings of the key roles of social workers and an enhanced sense of professional identity across nation states, despite very different starting points and current forms of organisation.

Theory and Practice: A Matter of Words. Language, Knowledge and Professional Community in Social Work

The relation between theory and practice in social work has always been controversial. Recently, many have underlined how language is crucial in order to capture how knowledge is used in practice. This article introduces a language perspective to the issue, rooted in the ‘strong programme’ in the sociology of knowledge and in Wittgenstein’s late work. According to this perspective, the meaning of categories and concepts corresponds to the use that concrete actors make of them as a result of on-going negotiation processes in specific contexts. Meanings may vary dramatically across social groups moved by different interests and holding different cultures. Accordingly, we may reformulate the issue of theory and practice in terms of the connections between different language games and power relationship between segments of the professional community. In this view, the point is anyway to look at how theoretical language relates to practitioners’ broader frames, and how it is transformed while providing words for making sense of experience.

Policy Contexts of Social Work in Britain: the wider implications of 'New' Labour and the 'New Legal Regime'

Several commentators have expressed disappointment with New Labour's apparent adherence to the policy frameworks of the previous Conservative administrations. The employment orientation of its welfare programmes, the contradictory nature of the social exclusion initiatives, and the continuing obsession with public sector marketisation, inspections, audits, standards and so on, have all come under critical scrutiny (c.f., Blyth 2001; Jordan 2001; Orme 2001). This paper suggests that in order to understand the socio-economic and political contexts affecting social work we need to examine the relationship between New Labour's modernisation project and its insertion within an architecture of global governance. In particular, membership of the European Union (EU), International Monetary Fund (IMF) and World Trade Organisation (WTO) set the parameters for domestic policy in important ways. Whilst much has been written about the economic dimensions of 'globalisation' in relation to social work rather less has been noted about the ways in which domestic policy agenda are driven by multilateral governance objectives. This policy dimension is important in trying to respond to various changes affecting social work as a professional activity. What is possible, what is encouraged, how things might be done, is tightly bounded by the policy frameworks governing practice and affected by those governing the lives of service users. It is unhelpful to see policy formulation in purely national terms as the UK is inserted into a network governance structure, a regulatory framework where decisions are made by many countries and organisations and agencies. Together, they are producing a 'new legal regime', characterised by a marked neo-liberal policy agenda. This paper aims to demonstrate the relationship of New Labour's modernisation programme to these new forms of legality by examining two main policy areas and the welfare implications they are enmeshed in. The first is privatisation, and the second is social policy in the European Union. Examining these areas allows a demonstration of how much of the New Labour programme can be understood as a local implementation of a transnational strategy, how parts of that strategy produce much of the social exclusion it purports to address, and how social welfare, and particularly social work, are noticeable by their absence within policy discourses of the strategy. The paper details how the privatisation programme is considered to be a crucial vehicle for the further development of a transnational political-economy, where capital accumulation has been redefined as 'welfare'. In this development, frameworks, codes and standards are central, and the final section of the paper examines how the modernisation strategy of the European Union depends upon social policy marked by an employment orientation and risk rationality, aimed at reconfiguring citizen identities.The strategy is governed through an 'open mode of coordination', in which codes, standards, benchmarks and so on play an important role. The paper considers the modernisation strategy and new legality within which it is embedded as dependent upon social policy as a technology of liberal governance, one demonstrating a new rationality in comparison to that governing post-Second World War welfare, and which aims to reconfigure institutional infrastructure and citizen identity.

Social Work, Social Politics and Justice

"The disaster does not primarily lie in people and in the way that they perceive the circumstances, rather in the circumstances that doom people to powerlessness and apathy - circumstances which they could, however, change" (Adorno, 1966, p. 189). When Karl Marx writes to Friedrich Sorge in his letter of the 19.10.1877, regarding his critique of the opinion of his opponents Dühring & Co., that one must deal with "a whole crowd of immature students and pompous doctors who claim to give socialism a 'higher, ideal' turn, that is to say, to replace the materialistic basis (that demands serious, objective study if one wants to operate on it)… with modern mythology by means of their goddesses of justice, freedom, equality and fraternité" (Marx, 1973, p. 303; cf. Schiller, 1993, p. 199 onwards), this thus refers to fundamental problems with the concept of "justice" up until today. As the debate shows, it concerns the contextualization of the term "justice", its meaning in historically concrete as well as socio-political circumstances, and therefore a social analysis that is both representation and critique. Essentially it also concerns the question of the relationship between ideas and reality and the development of standards of historical systematic 'nature' out of social frameworks (see Frey, 1978; Theunissen, 1989).

Social work and the Bologna Process

As social work training in Europe is characterized by progressive 'academisation' it is directly affected by the changes in university structures triggered by the Bologna Process. This means, however, simultaneously that all the ambiguities surrounding social work education, such as the level and rank it has achieved as an independent academic discipline, the relationship between theory and practice and the duality of training patterns at university and non-university institutions, are becoming more starkly apparent and need to be addressed with renewed urgency in practically all countries that have subscribed to the transformation initiative.

Semiotic Analysis in the Study of Social Work

Research and professional practices have the joint aim of re-structuring the preconceived notions of reality. They both want to gain the understanding about social reality. Social workers use their professional competence in order to grasp the reality of their clients, while researchers’ pursuit is to open the secrecies of the research material. Development and research are now so intertwined and inherent in almost all professional practices that making distinctions between practising, developing and researching has become difficult and in many aspects irrelevant. Moving towards research-based practices is possible and it is easily applied within the framework of the qualitative research approach (Dominelli 2005, 235; Humphries 2005, 280). Social work can be understood as acts and speech acts crisscrossing between social workers and clients. When trying to catch the verbal and non-verbal hints of each others’ behaviour, the actors have to do a lot of interpretations in a more or less uncertain mental landscape. Our point of departure is the idea that the study of social work practices requires tools which effectively reveal the internal complexity of social work (see, for example, Adams & Dominelli & Payne 2005, 294 – 295). The boom of qualitative research methodologies in recent decades is associated with much profound the rupture in humanities, which is called the linguistic turn (Rorty 1967). The idea that language is not transparently mediating our perceptions and thoughts about reality, but on the contrary it constitutes it was new and even confusing to many social scientists. Nowadays we have got used to read research reports which have applied different branches of discursive analyses or narratologic or semiotic approaches. Although differences are sophisticated between those orientations they share the idea of the predominance of language. Despite the lively research work of today’s social work and the research-minded atmosphere of social work practice, semiotics has rarely applied in social work research. However, social work as a communicative practice concerns symbols, metaphors and all kinds of the representative structures of language. Those items are at the core of semiotics, the science of signs, and the science which examines people using signs in their mutual interaction and their endeavours to make the sense of the world they live in, their semiosis. When thinking of the practice of social work and doing the research of it, a number of interpretational levels ought to be passed before reaching the research phase in social work. First of all, social workers have to interpret their clients’ situations, which will be recorded in the files. In some very rare cases those past situations will be reflected in discussions or perhaps interviews or put under the scrutiny of some researcher in the future. Each and every new observation adds its own flavour to the mixture of meanings. Social workers have combined their observations with previous experience and professional knowledge, furthermore, the situation on hand also influences the reactions. In addition, the interpretations made by social workers over the course of their daily working routines are never limited to being part of the personal process of the social worker, but are also always inherently cultural. The work aiming at social change is defined by the presence of an initial situation, a specific goal, and the means and ways of achieving it, which are – or which should be – agreed upon by the social worker and the client in situation which is unique and at the same time socially-driven. Because of the inherent plot-based nature of social work, the practices related to it can be analysed as stories (see Dominelli 2005, 234), given, of course, that they are signifying and told by someone. The research of the practices is concentrating on impressions, perceptions, judgements, accounts, documents etc. All these multifarious elements can be scrutinized as textual corpora, but not whatever textual material. In semiotic analysis, the material studied is characterised as verbal or textual and loaded with meanings. We present a contribution of research methodology, semiotic analysis, which has to our mind at least implicitly references to the social work practices. Our examples of semiotic interpretation have been picked up from our dissertations (Laine 2005; Saurama 2002). The data are official documents from the archives of a child welfare agency and transcriptions of the interviews of shelter employees. These data can be defined as stories told by the social workers of what they have seen and felt. The official documents present only fragmentations and they are often written in passive form. (Saurama 2002, 70.) The interviews carried out in the shelters can be described as stories where the narrators are more familiar and known. The material is characterised by the interaction between the interviewer and interviewee. The levels of the story and the telling of the story become apparent when interviews or documents are examined with the use of semiotic tools. The roots of semiotic interpretation can be found in three different branches; the American pragmatism, Saussurean linguistics in Paris and the so called formalism in Moscow and Tartu; however in this paper we are engaged with the so called Parisian School of semiology which prominent figure was A. J. Greimas. The Finnish sociologists Pekka Sulkunen and Jukka Törrönen (1997a; 1997b) have further developed the ideas of Greimas in their studies on socio-semiotics, and we lean on their ideas. In semiotics social reality is conceived as a relationship between subjects, observations, and interpretations and it is seen mediated by natural language which is the most common sign system among human beings (Mounin 1985; de Saussure 2006; Sebeok 1986). Signification is an act of associating an abstract context (signified) to some physical instrument (signifier). These two elements together form the basic concept, the “sign”, which never constitutes any kind of meaning alone. The meaning will be comprised in a distinction process where signs are being related to other signs. In this chain of signs, the meaning becomes diverged from reality. (Greimas 1980, 28; Potter 1996, 70; de Saussure 2006, 46-48.) One interpretative tool is to think of speech as a surface under which deep structures – i.e. values and norms – exist (Greimas & Courtes 1982; Greimas 1987). To our mind semiotics is very much about playing with two different levels of text: the syntagmatic surface which is more or less faithful to the grammar, and the paradigmatic, semantic structure of values and norms hidden in the deeper meanings of interpretations. Semiotic analysis deals precisely with the level of meaning which exists under the surface, but the only way to reach those meanings is through the textual level, the written or spoken text. That is why the tools are needed. In our studies, we have used the semiotic square and the actant analysis. The former is based on the distinctions and the categorisations of meanings, and the latter on opening the plotting of narratives in order to reach the value structures.

The Role of Social Work in National Development

The approach in this paper will be to define social work and national development first and then try to establish the relationship between the two. The various categories of social work and their presumed influence on the various aspects of development will then be discussed. Thereafter, the discussion will be directed to the overall effects of the process of social work, in its totality, on national development.

From school to work: A comprehensive model of work-related motivation in the transition to working life.

Motivation is a core concept to understand work related outcomes and vocational pursuits. However, existing research mostly focused on specific aspects of motivation, such as goals or self-efficacy beliefs, while falling short of adequately addressing more complex and integrative notions of motivation. Advancing the current state of research, we draw from Motivational Systems Theory and a model of proactive motivation to propose a comprehensive model of work-related motivation. Specifically, we define motivation as a system of mutually related factors consisting of goals, emotions, and personal agency beliefs, comprised by capability beliefs and context evaluations. Adapting this model of motivation to the school-to-work transition, we postulate that this motivational system is affected by different social, personal, and environmental variables, for example social support, the presence of role-models, personality traits, and scholastic achievement. We further expect that students with more autonomous work-related goals, expectations of more positive emotional experiences in their future working life, fewer perceived barriers to their career development, and higher work-related self-efficacy beliefs would be more successful in their transition from school to work. We also propose that goal-directed engagement acts as a partial mediator in the relationship between motivation and a successful transition. Finally, we hypothesize that work-related motivation while in school will have meaningful effects on positive outcomes while in vocational training, as represented by more work engagement, higher career commitment, job satisfaction, and lower intentions to quit training. In sum, we advance the point that the adaptation of a broader concept of work-related motivation in the school-to-work transition would result in more powerful predictions of success in this transition and would enhance scientific research and interventions in career development and counselling practice.