Structure and relationships of basal relictual angiosperms

2004 ◽  
Vol 17 (4) ◽  
pp. 343 ◽  
Author(s):  
Peter K. Endress

A review of the present perspective of basal angiosperms and the steps that led to this perspective is provided. Major steps of progress over the past century can be seen with the discovery of new extant plants (Degeneria), new fossils and the advent of new research methods, especially molecular cladistic studies, which catalysed new waves of research. A spectacular result in 1999 was the identification of the well-supported basalmost clades of the angiosperms, forming the ANITA grade, with Amborella, Nymphaeales and Austrobaileyales, by several research groups. This provided a new framework in which basal angiosperms can be discussed in evolutionary terms. In this review basalmost angiosperms (ANITA grade and Chloranthaceae) and other basal angiosperms (eumagnoliids and Ceratophyllaceae) are addressed, with a focus on the different major clades and on general traits and evolutionary tendencies. A short outlook for future avenues is also provided.

Author(s):  
Rimma M. Khaninova ◽  

Introduction. In the genre system of Kalmyk poetry, the literary fable appeared in the 1930s. When it came to master the genre, Kalmyk poets mainly focused on the traditions of Russian fable of the 19th–20th centuries, primarily on I. A. Krylov’s works which they eagerly translated. The Kalmyk authors were the least likely to rely on traditions of Eastern literature — whether Indian, Tibetan, or Oirat Mongolian — since those sources written in Tibetan, Classical Mongolian and Clear Script (Kalm. todo bichiq) were virtually unavailable to them, and not all poets had knowledge of the scripts. National folklore, including myths, animal tales, household tales, aphoristic poetry (proverbs, sayings, riddles), to a certain extent contributed to the creation of plots and motifs, a gallery of images ― people and the animal world ― in the Kalmyk literary fable. The appeal to the fable was determined by the tasks of cultural construction in Kalmykia, the satirical possibilities of the genre designed to scourge social vices and human shortcomings, contribute to the correction of morals, facilitate education of a person in the new society. Attention to the fable in 20th-century Kalmyk poetry was not that universal and constant, by the end of the century it was no longer in demand and never revived further. The Kalmyk literary fable has been little studied so far, with the exception of several recent articles by R. M. Khaninova, which determines the relevance of this study. Goals. The article aims to study zoopoetics of text of the animalistic fable in Kalmyk poetry of the past century through examples of selected works by Khasyr Syan-Belgin, Muutl Erdniev, Garya Shalburov, Basang Dordzhiev, Timofey Bembeev, and Mikhail Khoninov. Methods. The work employs a number of research methods, such as the historical literary, comparative, and descriptive ones. Results. The animalistic fable is not the leading one in the general genre system of Kalmyk poetry of the past century, including among fables with human characters. It usually includes characters of the steppe fauna whose figurative characteristics are manifested in Kalmyk folklore. The social satire and political orientation of the fables are actualized by modern reality, actual international situation and events. The paper reveals a relationship between the animal fable and — Kalmyk folklore and the Russian fable tradition. Most of the fables have not yet been translated into Russian. Conclusions. In terms of national versification patterns, the study of the Kalmyk poetic animal fable has identified such synthetic forms as fable-fairy tale, fable-proverb, and fable-dream. The genre definition is not always specified by the authors, a moral usually concludes each quatrain-structured narrative. Genre scenes, monologues, and dialogues contribute to an in-depth reading of the context, symbolism of images, and semantic code.


2012 ◽  
Vol 27 ◽  
pp. 463-496 ◽  
Author(s):  
Max Diem ◽  
Miloš Miljković ◽  
Benjamin Bird ◽  
Tatyana Chernenko ◽  
Jen Schubert ◽  
...  

This paper summarizes the progress achieved over the past fifteen years in applying vibrational (Raman and IR) spectroscopy to problems of medical diagnostics and cellular biology. During this time, a number of research groups have verified the enormous information content of vibrational spectra; in fact, genomic, proteomic, and metabolomic information can be deduced by decoding the observed vibrational spectra. This decoding process is aided enormously by the availability of high-power computer workstations and advanced algorithms for data analysis. Furthermore, commercial instrumentation for the fast collection of both Raman and infrared microspectral data has rendered practical the collection of images based solely on spectral data. The progress in the field has been manifested by a steady increase in the number and quality of publications submitted by established and new research groups in vibrational biological and biomedical arenas.


2010 ◽  
Vol 88 (3) ◽  
pp. 285-295 ◽  
Author(s):  
Yongqiang Chen ◽  
Meghan B. Azad ◽  
Spencer B. Gibson

Autophagy is an intracellular lysosomal degradation process, which in the case of macroautophagy, is characterized by the formation of double-membraned autophagosomes. Enhanced under stress conditions, autophagy can function to promote cell survival or cell death depending on the type of cellular stress. Interest in autophagy has increased substantially in the past several years as new research implicates this “self-eating” pathway in cell growth, development, and many human diseases. Various methods have been developed for detecting autophagy; however, the implementation of these methods and the interpretation of the results often vary between studies, and a more standardized approach is required. In this review, we summarize the current methods available for detecting autophagy and for determining its contribution to cell death. Furthermore, we discuss the critical points for the successful application of these methods based on experiences from our laboratory and from other research groups.


2021 ◽  
Vol 20 ◽  
pp. 755-785
Author(s):  
Richard L. Kremer ◽  
Ad Maas

This paper examines the role of book reviews in the discipline of the history of science by comparing their appearance in two periodicals, Isis, the flagship journal of the discipline that was founded in 1913, and the Journal for the History of Astronomy, founded in 1970 to serve a newly emerging, specialized subfield within the broader discipline. Our analysis of the reviews published in selected slices of time finds differing norms and reviewing practices within the two journals. Despite important changes during the past century in the conceptualization of the history of science and its research methods, reviewing practices in Isis remained remarkably consistent over time, with reviewers generally defending a fixed set of norms for “good” scholarship. More change appears in reviews of the Journal for the History of Astronomy, as its audience shifted from a mix of the laity, working astronomers, and historians to a specialized group of professional historians of astronomy. Scholarly norms, reflected in the reviews, shifted with these changes in readership. We conclude that book reviews offer rich sources for analyzing the evolution of scholarly disciplines and norms.


2018 ◽  
Vol 2 (1(3)) ◽  
pp. 95-102
Author(s):  
Adam Nobis

THE CROSSROADS OF CULTURAL STUDIESThe article provides an overview of proposals for understanding cultural studies, including its methodology and the subject of research. Over the past few decades, this discipline has come to comprise a multitude of different cultural approaches, which differ not only in words and their meaning, but also in what they relate to. The multiplicity of research of various phenomena, specific research methods, languages, as well as new theoretical findings are mezzo and micro concepts. This is a particular order of things. While previous theoretical proposals of understanding the discipline and its subject can be compared with the formulation of “grammars” of the languages of various cultural studies, the most recent period is characterised by the emergence of new research practices, described in different languages. Among these new languages are also those for which “grammars” have not yet been created.


2020 ◽  
Vol 12 (2) ◽  
pp. 206
Author(s):  
Yuhan Tian

This paper reviews the book of A Study of Metonymy through the Lens of Rhetorical Criticism. In this book, the author, Li Ke, tries to analyze and evaluate metonymy through the lens of rhetorical criticism, and proposes a new research paradigm called critical metonymy analysis based on which metonymic competence is well constructed that can be applied to teaching practice. He finds that the research horizon of metonymy has been mainly confined to traditional linguistics in the past, hardly involving interdisciplinary research. Besides, domestic studies are inclined to merely introduce western research achievement, lacking original theories and research methods. Therefore, this book is of great value in both theoretical and practical aspects. Besides the advantages, this book can be refined by adding objects of critical metonymy analysis to extend its linguistic data. In addition, it can also be improved by classifying and analyzing these data systematically. 


Author(s):  
Susan L. Averett ◽  
Laura M. Argys ◽  
Saul D. Hoffman

The transformation of women’s lives in the past century is among the most significant and far-reaching social and economic phenomena, affecting not only women but also their partners and children. In developed and developing countries alike, women are acquiring more education, marrying later, having fewer children, and spending a far greater fraction of their adult lives in the labor force. This Handbook provides the first comprehensive collection of essays that addresses these issues, using the powerful framework of economics. The Introduction offers an overview of the field. It outlines its intellectual foundations and then reviews the many ways in which research into women’s issues expanded and strengthened research methods and practices throughout economics. It then provides an overview of the thirty-one chapters in the Handbook. It concludes with thoughts about the strengths and weaknesses of the existing literature and about the further development of the field.


2021 ◽  
Author(s):  
John T Walker ◽  
Diane C Saunders ◽  
Marcela Brissova ◽  
Alvin C Powers

Abstract This review focuses on the human pancreatic islet – including its structure, cell composition, development, function, and dysfunction. After providing a historical timeline of key discoveries about human islets over the past century, we describe new research approaches and technologies that are being used to study human islets and how these are providing insight into human islet physiology and pathophysiology. We also describe changes or adaptations in human islets in response to physiologic challenges such as pregnancy, aging, and insulin resistance and discuss islet changes in human diabetes of many forms. We outline current and future interventions being developed to protect, restore, or replace human islets. The review also highlights unresolved questions about human islets and proposes areas where additional research on human islets is needed.


2018 ◽  
Author(s):  
Charan Ranganath

Over the past 15 years, there has been an explosion of new research on the role of the hippocampus in representation of information about time in memory. Much of this work was inspired by the ideas and research of Howard Eichenbaum, who made major contributions to our understanding of the neurobiology of episodic memory and the neural representation of time. In this paper, I will review evidence regarding the role of time in understanding hippocampal function. This review will cover a broad range of evidence from studies of humans and nonhuman animals with a narrative arc that follows Howard’s major discoveries. These studies demonstrate that the hippocampus encodes information in relation to an episodic context, and that time, as well as space, serves to define these contexts. Moreover, the research has shown that the hippocampus can encode temporal, spatial, and situational information in parallel. Building on this work, I present a new framework for understanding temporal structure in human episodic memory. I conclude by outlining current controversies and new questions that must be addressed by the field in the years to come.


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