scholarly journals Homocysteine Modification in Protein Structure/Function and Human Disease

2019 ◽  
Vol 99 (1) ◽  
pp. 555-604 ◽  
Author(s):  
Hieronim Jakubowski

Epidemiological studies established that elevated homocysteine, an important intermediate in folate, vitamin B12, and one carbon metabolism, is associated with poor health, including heart and brain diseases. Earlier studies show that patients with severe hyperhomocysteinemia, first identified in the 1960s, exhibit neurological and cardiovascular abnormalities and premature death due to vascular complications. Although homocysteine is considered to be a nonprotein amino acid, studies over the past 2 decades have led to discoveries of protein-related homocysteine metabolism and mechanisms by which homocysteine can become a component of proteins. Homocysteine-containing proteins lose their biological function and acquire cytotoxic, proinflammatory, proatherothrombotic, and proneuropathic properties, which can account for the various disease phenotypes associated with hyperhomocysteinemia. This review describes mechanisms by which hyperhomocysteinemia affects cellular proteostasis, provides a comprehensive account of the biological chemistry of homocysteine-containing proteins, and discusses pathophysiological consequences and clinical implications of their formation.

Author(s):  
П. В. Капустин ◽  
А. И. Гаврилов

Состояние проблемы. Проблематика городской среды заявила о себе в 1960-е годы как протест против модернистских методов урбанизма и других видов проектирования. Средовое движение не случайно тогда именовали «антипрофессиональным» - оно было направлено против устоявшихся и недейственных методов работы с городом - от исследования до управления. За прошедшие десятилетия в рамках самого средового движения и его идейных наследников наработано немало методов и приемов работы, однако они до сих не подвергались анализу как пребывающая в исторической динамике целостная совокупность инструментария, альтернативного традиционному градостроительству. Результаты. Рассмотрены особенности и проблемы анализа методологического «арсенала» средового движения и урбанистики. Методы работы с городской средой впервые структурированы по типам знания. Показана близость методов исследовательского и проектного подходов в отношении городской среды. Выводы. В ближайшее время можно ожидать появления новых синтетических знаний и частных методологий, связанных как с обострением средовой проблематики, с расширением круга средовых акторов, так и с процессом профессионализации урбанистики. Statement of the problem. The urban environment paradigm emerged in the 1960s as a protest against the modernist methods of urbanism and other types of design. It was no coincidence that the environmental movement was back then called "anti-professional" as it was directed against the established and ineffective methods of working with the city, i. e., from research to management. Over the past decades, within the framework of the environmental movement and its ideological heirs, a lot of methods and have been developed. However, they have not yet been analyzed as an integral set of tools in the historical dynamics which is an alternative to traditional urban planning. Results. The features and problems of the analysis of the methodological “arsenal” of environmental movement and urban studies are considered. The methods of working with the urban environment are first structured according to the types of knowledge. The proximity of research and design approaches in the case when the urban environment is dealt with is shown. Conclusions. In the nearest future, we can expect new synthetic knowledge and particular methodologies related to both the exacerbation of environmental problems to emerge as well as the expansion of the circle of environmental actors and the process of professionalization of urbanstics.


2020 ◽  
Vol 9 (2) ◽  
pp. 82-90
Author(s):  
Matthew J. Pesko

Anxiety disorders are commonly experienced by college and university students and should be routinely assessed in mental health settings. Epidemiological studies suggest that the burden of these illnesses has greatly expanded even over the past decade. Factors that contribute to the experience of an anxiety disorder in a young adult student population are considered herein. The best practice for evaluation and treatment of these disorders is presented based on the review of available literature in this field. Special attention is paid to the concept of resilience as it pertains to anxiety disorders in the student population.


Author(s):  
Elwira Sienkiewicz ◽  
Michał Gąsiorowski ◽  
Ladislav Hamerlík ◽  
Peter Bitušík ◽  
Joanna Stańczak

AbstractLakes located in the Polish and Slovak parts of the Tatra Mountains were included in the Tatra diatom database (POL_SLOV training set). The relationship between the diatoms and the water chemistry in the surface sediments of 33 lakes was the basis for the statistical and numerical techniques for quantitative pH reconstruction. The reconstruction of the past water pH was performed using the alpine (AL:PE) and POL_SLOV training sets to compare the reliability of the databases for the Tatra lakes. The results showed that the POL_SLOV training set had better statistical parameters (R2 higher by 0.16, RMSE and max. bias lower by 0.2 and 0.36, respectively) compared to the AL:PE training set. The better performance of the POL_SLOV training set is particularly visible in the case of Przedni Staw Polski where the curve of the inferred water pH shows an opposite trend for the period from the 1960s to 1990 compared to that based on the AL:PE dataset. The reliability of the inferred pH was confirmed by the comparison with current instrumental measurements.


2021 ◽  
Vol 54 (1) ◽  
pp. 21-33
Author(s):  
Julie Berg ◽  
Clifford Shearing

The 40th Anniversary Edition of Taylor, Walton and Young’s New Criminology, published in 2013, opened with these words: ‘The New Criminology was written at a particular time and place, it was a product of 1968 and its aftermath; a world turned upside down’. We are at a similar moment today. Several developments have been, and are turning, our 21st century world upside down. Among the most profound has been the emergence of a new earth, that the ‘Anthropocene’ references, and ‘cyberspace’, a term first used in the 1960s, which James Lovelock has recently termed a ‘Novacene’, a world that includes both human and artificial intelligences. We live today on an earth that is proving to be very different to the Holocene earth, our home for the past 12,000 years. To appreciate the Novacene one need only think of our ‘smart’ phones. This world constitutes a novel domain of existence that Castells has conceived of as a terrain of ‘material arrangements that allow for simultaneity of social practices without territorial contiguity’ – a world of sprawling material infrastructures, that has enabled a ‘space of flows’, through which massive amounts of information travel. Like the Anthropocene, the Novacene has brought with it novel ‘harmscapes’, for example, attacks on energy systems. In this paper, we consider how criminology has responded to these harmscapes brought on by these new worlds. We identify ‘lines of flight’ that are emerging, as these challenges are being met by criminological thinkers who are developing the conceptual trajectories that are shaping 21st century criminologies.


2002 ◽  
Vol 18 (2) ◽  
pp. 351-362
Author(s):  
Pablo A. J. Brescia ◽  
Scott M. Bennett

This interview with Mexican writer David Toscana ponders the current state of both Mexican and Latin American narrative and serves as an insight into his own works. Toscana's statements about the recurring themes in his narrative (failure, loneliness, characters put to the test, and a tendency to play with different time frames, especially in his novels) help illustrate some of the characteristics of his fiction, which, according to various critics, is one of the most promising today in Mexico. Also noteworthy are his comments about the tendency of writers from his generation (born in the 1960s and later) to reject the legacy of the "boom" writers. Toscana's own interest is to revisit history and tradition by constructing a different voice and a different vision, a new way of seeing and hearing both the past and the present. Esta entrevista con el escritor mexicano David Toscana trata de explorar el estado actual de la narrativa mexicana y latinoamericana, améén de servir como una aproximacióón a la incipiente obra de este autor. Las respuestas de Toscana sobre los temas recurrentes en su literatura (el fracaso, la soledad, los personajes sometidos a pruebas y una tendencia a proponer diferentes marcos temporales, especialmente en sus novelas) subrayan algunos rasgos de su ficcióón, la cual, segúún la críítica especializada, es una de las máás prometedoras en el panorama mexicano de hoy. De especial interéés son los comentarios de Toscana sobre la tendencia de los escritores de su generacióón a rechazar el legado del "boom" latinoamericano. Toscana reacciona contra ese rechazo y propone una voz personal que vuelva a la historia y a la tradicióón y plantee una nueva manera de ver el pasado y el presente de Mééxico.


2017 ◽  
Vol 31 (2) ◽  
pp. 125-144 ◽  
Author(s):  
Joshua D. Angrist ◽  
Jörn-Steffen Pischke

The past half-century has seen economic research become increasingly empirical, while the nature of empirical economic research has also changed. In the 1960s and 1970s, an empirical economist's typical mission was to “explain” economic variables like wages or GDP growth. Applied econometrics has since evolved to prioritize the estimation of specific causal effects and empirical policy analysis over general models of outcome determination. Yet econometric instruction remains mostly abstract, focusing on the search for “true models” and technical concerns associated with classical regression assumptions. Questions of research design and causality still take a back seat in the classroom, in spite of having risen to the top of the modern empirical agenda. This essay traces the divergent development of econometric teaching and empirical practice, arguing for a pedagogical paradigm shift.


1989 ◽  
pp. 93
Author(s):  
Sara Dunn ◽  
Sheila Rowbotham
Keyword(s):  
The Past ◽  

2018 ◽  
Author(s):  
Angela Duckworth ◽  

Compared to 50 years ago, are children today better or worse at delaying gratification? If you answered “worse,” then you have company. Roughly 3 out of 4 parents believe that self-control has decreased over the past half-century. Likewise, when given a brief description of the famous marshmallow test, the same proportion of parents guess that preschoolers today are less able to delay gratification than their counterparts in the 1960s. Here's how one older gentleman described the decline of self-controlled behavior among kids of his generation. The children now love luxury; they have bad manners, contempt for authority; they show disrespect for elders and love chatter in place of exercise. Children are now tyrants, not the servants of their households. They no longer rise when elders enter the room. They contradict their parents, chatter before company, gobble up dainties at the table, cross their legs, and tyrannize their teachers.


2016 ◽  
Vol 64 (8) ◽  
pp. 643 ◽  
Author(s):  
Christopher N. Johnson

Since the 1960s, Australian scientists have speculated on the impact of human arrival on fire regimes in Australia, and on the relationship of landscape fire to extinction of the Pleistocene megafauna of Australia. These speculations have produced a series of contrasting hypotheses that can now be tested using evidence collected over the past two decades. In the present paper, I summarise those hypotheses and review that evidence. The main conclusions of this are that (1) the effects of people on fire regimes in the Pleistocene were modest at the continental scale, and difficult to distinguish from climatic controls on fire, (2) the arrival of people triggered extinction of Australia’s megafauna, but fire had little or no role in the extinction of those animals, which was probably due primarily to hunting and (3) megafaunal extinction is likely to have caused a cascade of changes that included increased fire, but only in some environments. We do not yet understand what environmental factors controlled the strength and nature of cascading effects of megafaunal extinction. This is an important topic for future research.


2014 ◽  
Vol 25 (2) ◽  
pp. 172 ◽  
Author(s):  
Mike Smith

This paper examines how the past of desert landscapes has been interpreted since European explorers and scientists first encountered them. It charts the research that created the conceptual space within which archaeologists and Quaternarists now work. Studies from the 1840s–1960s created the notion of a ‘Great Australian Arid Period'. The 1960s studies of Lake Mungo and the Willandra Lakes by Jim Bowler revealed the cyclical nature of palaeolakes, that changed with climate changes in the Pleistocene, and the complexity of desert pasts. SLEADS and other researchers in the 1980s used thermoluminescence techniques that showed further complexities in desert lands beyond the Willandra particularly through new studies in the Strzelecki and Simpson Dunefields, Lake Eyre, Lake Woods and Lake Gregory. Australian deserts are varied and have very different histories. Far from ‘timeless lands', they have carried detailed information about long-term climate changes on continental scales.


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