scholarly journals Poisonous plants : historical overview : Onderstepoort and veterinary research in Africa

Author(s):  
T.S. Kellerman

South Africa is blessed with one of the richest floras in the world, which - not surprisingly - includes many poisonous plants. Theiler in the founding years believed that plants could be involved in the aetiologies of many of the then unexplained conditions of stock, such as gousiekte and geeldikkop. His subsequent investigations of plant poisonings largely laid the foundation for the future Sections of Toxicology at the Institute and the Faculty of Veterinary Science (UP). The history of research into plant poisonings over the last 100 years is briefly outlined. Some examples of sustained research on important plant poisonings, such as cardiac glycoside poisoning and gousiekte, are given to illustrate our approach to the subject and the progress that has been made. The collation and transfer of information and the impact of plant poisonings on the livestock industry is discussed and possible avenues of future research are investigated.

2017 ◽  
Author(s):  
Darren Rhodes

Time is a fundamental dimension of human perception, cognition and action, as the perception and cognition of temporal information is essential for everyday activities and survival. Innumerable studies have investigated the perception of time over the last 100 years, but the neural and computational bases for the processing of time remains unknown. First, we present a brief history of research and the methods used in time perception and then discuss the psychophysical approach to time, extant models of time perception, and advancing inconsistencies between each account that this review aims to bridge the gap between. Recent work has advocated a Bayesian approach to time perception. This framework has been applied to both duration and perceived timing, where prior expectations about when a stimulus might occur in the future (prior distribution) are combined with current sensory evidence (likelihood function) in order to generate the perception of temporal properties (posterior distribution). In general, these models predict that the brain uses temporal expectations to bias perception in a way that stimuli are ‘regularized’ i.e. stimuli look more like what has been seen before. Evidence for this framework has been found using human psychophysical testing (experimental methods to quantify behaviour in the perceptual system). Finally, an outlook for how these models can advance future research in temporal perception is discussed.


SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A148-A149
Author(s):  
Jessica Dietch ◽  
Norah Simpson ◽  
Joshua Tutek ◽  
Isabelle Tully ◽  
Elizabeth Rangel ◽  
...  

Abstract Introduction The purpose of the current study was to examine the relationship between current beliefs about hypnotic medications and historical use of prescription hypnotic medications or non-prescription substances for sleep (i.e., over the counter [OTC] medications, alcohol, and cannabis). Methods Participants were 142 middle age and older adults with insomnia (M age = 62.9 [SD = 8.1]; 71.1% female) enrolled in the RCT of the Effectiveness of Stepped-Care Sleep Therapy In General Practice (RESTING) study. Participants reported on history of substances they have tried for insomnia and completed the Beliefs about Medications Questionnaire-Specific with two subscales assessing beliefs about 1) the necessity for hypnotics, and 2) concerns about potential adverse consequences of hypnotics. Participants were grouped based on whether they had used no substances for sleep (No Subs, 11.6%), only prescription medications (Rx Only, 9.5%), only non-prescription substances (NonRx Only, 26.6%), or both prescription and non-prescription substances (Both, 52.3%). Results Sixty-one percent of the sample had used prescription medication for sleep and 79% had used non-prescription substances (74% OTC medication, 23% alcohol, 34% cannabis). The greater number of historical substances endorsed, the stronger the beliefs about necessity of hypnotics, F(1,140)=23.3, p<.001, but not about concerns. Substance groups differed significantly on necessity beliefs, F(3,1)=10.68, p<.001; post-hocs revealed the Both group had stronger beliefs than the No and NonRx Only groups. Substance groups also differed significantly on the concerns subscale, F(3,1)=6.68, p<.001; post-hocs revealed the NonRx Only group had stronger harm beliefs than the other three groups. Conclusion The majority of the sample had used both prescription and non-prescription substances to treat insomnia. Historical use of substances for treating insomnia was associated with current beliefs about hypnotics. Individuals who had used both prescription and non-prescription substances for sleep in the past had stronger beliefs about needing hypnotics to sleep at present, which may reflect a pattern of multiple treatment failures. Individuals who had only tried non-prescription substances for sleep may have specifically sought alternative substances due to concerns about using hypnotics. Future research should seek to understand the impact of treatment history on engagement in and benefit from non-medication-based treatment for insomnia. Support (if any) 1R01AG057500; 2T32MH019938-26A1


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Maja Dorota Wojciechowska

Purpose The purpose of the paper is to present the latest scholarly trends in the field of social capital in libraries, to review research concepts published by LIS professionals and to suggest further research possibilities in this area. Design/methodology/approach This paper presents a review and critical analysis of literature associated with research on social capital in libraries to highlight its importance for the development of LIS and its impact on the functioning of environments linked with various types of libraries. The goal of literature analysis was to determine the current condition of research on social capital in libraries. The main trends were identified and the need for further qualitative analyses, which are missing at the moment, was confirmed. Findings It was determined that, so far, LIS professionals have focussed mainly on the role of municipal libraries in developing social capital, the problem of building trust, especially in immigrant circles and the impact of libraries on promoting a civil society. Academic libraries, rural libraries, organisational capital in libraries and individual social capital of librarians were a much less frequent subject of research. The role of libraries in developing social capital in educational (primary and secondary education) and professional (non-university professionals) circles is practically non-existent in research, and it will require in-depth studies and analyses in the coming years. Originality/value This paper constitutes a synthetic review of the latest research concepts concerning social capital in libraries. It identifies the most important research trends and areas that so far have not been explored and suggests research methods to help LIS professionals design future research in this area more effectively.


Author(s):  
Iuliia Rossius

The goal of this article consists in demonstration of the impact of research in the field of history and theory of law alongside the hermeneutics of Emilio Betti impacted the vector of this philosophical thought. The subject of this article is the lectures read by Emilio Betti (prolusioni) in 1927 and 1948, as well as his writings of 1949 and 1962. Analysis is conducted on the succession of Betti's ideas in these works, which is traced despite the discrepancy in their theme (legal and philosophical). The author indicates “legal” origin of the canons of Bettis’ hermeneutics, namely the canon of autonomy of the object. Emphasis is placed on the problem of objectivity in Betti's theory, as well as on dialectical tension between the historicity of the interpreted subject and strangeness of the object that accompanies legal, as well as any other type of interpretation. The article reveals the key moment of Betti's criticism of Hans-Georg Gadamer. Regarding the question of historicity of the subject of interpretation. The conclusion is made that the origin of the general theory of interpretation lies in the approaches and methods developed and implemented by Betti back in legal hermeneutics and in studying history of law.   Betti's philosophical theory was significantly affected by the idea on the role of modern legal dogma in interpretation of the history of law. Namely this idea that contains the principle of historicity of the subject of interpretation, which commenced  the general hermeneutical theory of Emilio Betti, was realized in canon of the relevance of understanding in the lecture in 1948, and later in the “general theory of interpretation”. The author also underlines that the question of objectivity of understanding, which has crucial practical importance in legal hermeneutics, was transmitted into the philosophical works of E. Betti, finding reflection in dialectic of the subject and object of interpretation.


Author(s):  
Monique A. Bedasse

When Rastafarians began to petition the Tanzanian government for the “right of entry” in 1976, they benefitted from a history of linkages between Jamaica and Tanzania, facilitated largely by the personal and political friendship between Julius Nyerere and Prime Minister of Jamaica, Michael Manley. This is the subject of the third chapter, which provides essential context for the repatriation. The chapter begins by unearthing the pan-African politics of Michael Manley, which he constructed after appropriating Rastafarian symbols and consciousness into his political campaigns. It also puts a spotlight on the extent to which African leaders of newly independent states helped to define the pan-Africanism of this period by detailing the impact of Julius Nyerere on Manley’s thinking. Finally, it juxtaposes Manley’s acceptance in pan-African circles across Africa with his personal struggle over his own perceived distance from blackness, as a member of Jamaica’s “brown’ elite. In the end, Rastafari was absolutely central to generating the brand of politics surrounding race, color and class in the moment of decolonization. The history of repatriation transgresses analytical boundaries between state and nonstate actors.


Author(s):  
Moshe Mishkinsky

This chapter describes a turning point in the history of Polish Socialism and its attitude towards the Jewish Question. In dealing with the concept of the Jewish Question, the intention is not, as is often the case, to dwell solely upon the legal status of Jews (emancipation) but to view the problems of Jewish existence in their diversity. According to one view, the dependence upon non Jewish society represents an integral element or, even a determinant, in these problems. In the context of Polish–Jewish relations from the historical perspective of the last hundred years, one may discern six aspects of the subject. These include the development of Socialist thought in its different versions as regards the Jews; the influence of the gradual growth and development of the emerging working class in Polish society; the influence of the relatively large involvement of Jews within the Socialist Labour Movement; the impact of the new processes which matured in the last quarter of the 19th century on the life of Eastern European Jewry in general, and on the Polish–Jewish area in particular; the growth alongside each other, but also in conflict, of two political and ideological movements — Polish Socialism and Jewish labour Socialism; and the tension between the Socialist and the national elements which was common to both yet different in its concrete content.


1961 ◽  
Vol 16 (04) ◽  
pp. 233-260
Author(s):  
T. Hugh Beech

Can the National Pension Scheme as a whole now be expected to maintain solvency? On what lines may the Scheme be expected to develop in the future? Should contracting out not have been permitted?The temptation to go into these and other fascinating questions will be resisted as far as possible; it is proposed instead to confine the subject matter of this paper reasonably closely within the area implied in the title. In order to establish the context in which the present situation has arisen, it is appropriate, however, to begin with a very brief survey of the more recent history of national and private pensions in Britain before the passing of the National Insurance Act 1959, which will be referred to henceforward simply as ‘the Act’; the situation before the Act comes into operation will similarly be referred to as ‘pre-Act’. When the Act comes into operation two new situations will arise; ‘Contracted-in’ and ‘Contracted-out’. There are thus three conditions to consider, and as far as possible when using expressions in connexion with contracting out such as saving, extra cost, etc., it will be stated whether these are by comparison with the contracted-in or pre-Act position, lack of clarity on this point having been a source of confusion in some of the literature on the subject.


2018 ◽  
Vol 13 (S349) ◽  
pp. 71-74
Author(s):  
Hans Rickman

AbstractA brief history of research concerning the risk of impacts by asteroids or comets onto the Earth is presented with attention to the role played by the IAU. Special focus is placed on the events that occurred about 20 years ago, which caused the IAU to become seriously involved in dealing with the impact hazard and to take a leading role in international coordination of these activities.


2019 ◽  
Vol 5 (4) ◽  
pp. 695-702 ◽  
Author(s):  
Julien Morency-Laflamme ◽  
Theodore McLauchlin

Abstract Does ethnic stacking in the armed forces help prevent military defection? Recent research, particularly in Africa and the Middle East, suggests so; by favoring in-groups, regimes can keep in-group soldiers loyal. In-group loyalty comes at the cost of antagonizing members of out-groups, but many regimes gladly run that risk. In this research note, we provide the first large-scale evidence on the impact of ethnic stacking on the incidence of military defection during uprisings from below, using data on fifty-seven popular uprisings in Africa since formal independence. We find clear evidence for the downside: ethnic stacking is associated with more frequent defection if out-group members are still dominant in the armed forces. We find more limited support for the hypothesized payoff. Ethnic stacking may reduce the risk of defection, but only in regimes without a recent history of coup attempts. Future research should therefore trace the solidification of ethnic stacking over time.


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