scholarly journals A 150-Year Conundrum: Cranial Robusticity and Its Bearing on the Origin of Aboriginal Australians

2011 ◽  
Vol 2011 ◽  
pp. 1-18 ◽  
Author(s):  
Darren Curnoe

The origin of Aboriginal Australians has been a central question of palaeoanthropology since its inception during the 19th Century. Moreover, the idea that Australians could trace their ancestry to a non-modern Pleistocene population such as Homo erectus in Southeast Asia have existed for more than 100 years, being explicitly linked to cranial robusticity. It is argued here that in order to resolve this issue a new program of research should be embraced, one aiming to test the full range of alternative explanations for robust morphology. Recent developments in the morphological sciences, especially relating to the ontogeny of the cranium indicate that character atomisation, an approach underpinning phylogenetic reconstruction, is fraught with difficulties. This leads to the conclusion that phylogenetic-based explanations for robusticity should be reconsidered and a more parsimonious approach to explaining Aboriginal Australian origins taken. One that takes proper account of the complex processes involved in the growth of the human cranium rather than just assuming natural selection to explain every subtle variation seen in past populations. In doing so, the null hypothesis that robusticity might result from phenotypic plasticity alone cannot be rejected, a position at odds with both reticulate and deep-time continuity models of Australian origins.

Blood ◽  
2003 ◽  
Vol 102 (2) ◽  
pp. 449-461 ◽  
Author(s):  
Bernhard Nieswandt ◽  
Steve P. Watson

AbstractAt sites of vascular injury, platelets come into contact with subendothelial collagen, which triggers their activation and the formation of a hemostatic plug. Besides glycoprotein Ib (GPIb) and αIIbβ3 integrin, which indirectly interact with collagen via von Willebrand factor (VWF), several collagen receptors have been identified on platelets, most notably α2β1 integrin and the immunoglobulin (Ig) superfamily member GPVI. Within the last few years, major advances have been made in understanding platelet-collagen interactions including the molecular cloning of GPVI, the generation of mouse strains lacking individual collagen receptors, and the development of collagen receptor–specific antibodies and synthetic peptides. It is now recognized that platelet adhesion to collagen requires prior activation of integrins through “inside-out” signals generated by GPVI and reinforced by released second-wave mediators adenosine diphosphate (ADP) and thromboxane A2. These developments have led to revision of the original “2-site, 2-step” model, which now places GPVI in a central position in the complex processes of platelet tethering, activation, adhesion, aggregation, degranulation, and procoagulant activity on collagen. This review discusses these recent developments and proposes possible mechanisms for how GPVI acts in concert with other receptors and signaling pathways to initiate hemostasis and arterial thrombosis.


2014 ◽  
Vol 06 (04) ◽  
pp. 557-571 ◽  
Author(s):  
Azer Akhmedov

In recent decades, many remarkable papers have appeared which are devoted to the study of finitely generated subgroups of Diff+([0, 1]) (see [8, 15, 16, 19–23, 29, 30, 39, 40] only for some of the most recent developments). In contrast, discrete subgroups of the group Diff+([0, 1]) are much less studied. Very little is known in this area especially in comparison with the very rich theory of discrete subgroups of Lie groups which has started in the works of F. Klein and H. Poincaré in the 19th century, and has experienced enormous growth in the works of A. Selberg, A. Borel, G. Mostow, G. Margulis and many others in the 20th century. Many questions which are either very easy or have been studied a long time ago for (discrete) subgroups of Lie groups remain open in the context of the infinite-dimensional group Diff+([0, 1]) and its relatives.


Parasitology ◽  
2014 ◽  
Vol 141 (14) ◽  
pp. 1841-1855 ◽  
Author(s):  
PAUL L. A. M. CORSTJENS ◽  
CLAUDIA J. DE DOOD ◽  
DIEUWKE KORNELIS ◽  
ELISA M. TJON KON FAT ◽  
R. ALAN WILSON ◽  
...  

SUMMARYThe potential of various quantitative lateral flow (LF) based assays utilizing up-converting phosphor (UCP) reporters for the diagnosis of schistosomiasis is reviewed including recent developments. Active infections are demonstrated by screening for the presence of regurgitated worm antigens (genus specific polysaccharides), whereas anti-Schistosomaantibodies may indicate ongoing as well as past infections. The circulating anodic antigen (CAA) in serum or urine (and potentially also saliva) is identified as the marker that may allow detection of single-worm infections. Quantitation of antigen levels is a reliable method to study effects of drug administration, worm burden and anti-fecundity mechanisms. Moreover, the ratio of CAA and circulating cathodic antigen (CCA) is postulated to facilitate identification of eitherSchistosoma mansoniorSchistosoma haematobiuminfections. The UCP-LF assays allow simultaneous detection of multiple targets on a single strip, a valuable feature for antibody detection assays. Although antibody detection in endemic regions is not a useful tool to diagnose active infections, it gains potential when the ratio of different classes of antibody specific for the parasite/disease can be determined. The UCP-LF antibody assay format allows this type of multiplexing, including testing a linear array of up to 20 different targets. Multiple test spots would allow detection of specific antibodies, e.g. against differentSchistosomaspecies or other pathogens as soil-transmitted helminths. Concluding, the different UCP-LF based assays for diagnosis of schistosomiasis provide a collection of tests with relatively low complexity and high sensitivity, covering the full range of diagnostics needed in control programmes for mapping, screening and monitoring.


Author(s):  
J. Ford ◽  
D. Kafetsouli ◽  
H. Wilson ◽  
C. Udeh-Momoh ◽  
M. Politis ◽  
...  

Neuroimaging serves a variety of purposes in Alzheimer’s disease (AD) and related dementias (ADRD) research - from measuring microscale neural activity at the subcellular level, to broad topological patterns seen across macroscale-brain networks, and everything in between. In vivo imaging provides insight into the brain’s structure, function, and molecular architecture across numerous scales of resolution; allowing examination of the morphological, functional, and pathological changes that occurs in patients across different AD stages (1). AD is a complex and potentially heterogenous disease, with no proven cure and no single risk factor to isolate and measure, whilst known risk factors do not fully account for the risk of developing this disease (2). Since the 1990’s, technological advancements in neuroimaging have allowed us to visualise the wide organisational structure of the brain (3) and later developments led to capturing information of brain ‘functionality’, as well as the visualisation and measurement of the aggregation and accumulation of AD-related pathology. Thus, in vivo brain imaging has and will continue to be an instrumental tool in clinical research, mainly in the pre-clinical disease stages, aimed at elucidating the biological complex processes and interactions underpinning the onset and progression of cognitive decline and dementia. The growing societal burden of AD/ADRD means that there has never been a greater need, nor a better time, to use such powerful and sensitive tools to aid our understanding of this undoubtedly complex disease. It is by consolidating and reflecting on these imaging advancements and developing long-term strategies across different disciplines, that we can move closer to our goal of dementia prevention. This short commentary will outline recent developments in neuroimaging in the field of AD and dementia by first describing the historical context of AD classification and the introduction of AD imaging biomarkers, followed by some examples of significant recent developments in neuroimaging methods and technologies.


Studia Humana ◽  
2017 ◽  
Vol 6 (4) ◽  
pp. 52-61
Author(s):  
Jesenko Tešan ◽  
Joan Davison

AbstractThis paper analyzes the symbolism of George Kennan’s famous “X” article relative to the challenges of contemporary post-socialist and post-conflict transitions. It unpacks recent developments in the field of contemporary political discourse, discussing the critical application of practices such as thinking with your heart, parrhesis, and pathos, as well as Kennan’s suggestion of the significance of uncertainty and reflection for global relations. The central question is: What would Kennan write in an X Article to the societies and states in transition? While various definitions of the term “parrhesis” exist, this paper employs both the definition suggested by Michel Foucault who understood it as “fearless speech” and Eric Voegelin who closely follows Plato’s meaning linking it with “heart”, i.e. vision of the spiritual, an existential (dis)order of representatives of a society.


2000 ◽  
Vol 113 (19) ◽  
pp. 3355-3356
Author(s):  
P.J. Sansonetti

Advances in Cell and Molecular Biology of Membranes and Organelles Volume 5 - Phagocytosis: the Host edited by Alan M. Tartakoff; volume editor, Siamon Gordon JAI Press Inc./Ablex Publishing Corp. (1999) pp. 521. ISBN 1–55938-999-0 $147.50 Over the last few years, cell biology has become a dominant approach in several disciplines of the life sciences, including the study of phagocytic cells! Before, with exceptions, the science of phagocytosis had often remained descriptive, with microbiologists providing detailed descriptions of the various types and stages of internalization and killing or survival of the pathogenic microorganisms, and immunologists providing an exhaustive description of the complex processes of microbe degradation, antigen processing and presentation following the phagocytic process per se. Phagocytosis: the Host excellently reflects the revolution that has occurred in this field. In other words, the science of phagocytosis is now dominated by an analytical approach based on deciphering the signals that carry out each of the critical steps of the process. Edited by a master of the discipline, in 21 chapters, this book - with great justice dedicated to the late Zanvil A. Cohn - covers the molecular and cellular aspects of phagocytic processes in a logical progression. The best specialists in the field have risen to the challenge. Four chapters are devoted to receptors, certainly representing one of the best and most exhaustive current reviews of this field. Of particular interest are the recent developments on scavenging receptors with regard to phagocytosis of both microbes and apoptotic bodies. In the next three chapters, signalling makes a spectacular entry: our knowledge of the molecular mechanisms that regulate the cytoskeleton is exponentially increasing and finds here its perfect niche. To this section might have been added the chapter entitled ‘The Phagocytic Actin Cytoskeleton’, which appears in the next section of four chapters devoted to ‘the pathway’, in other words, the maturation of phagosomes. Here again, progress has been tremendous in understanding the logics of maturation pathways and we are very much looking forward to the next volume Phagocytosis: the Microbes, which will show how these microbes can perturb, to their profit, phagosomal maturation in order to ‘carve’ a niche which permits their survival. A splendid example of coevolution. The last five chapters form a section (Responses) that encompasses most of the effector mechanisms that link the phagocytic event to the immune response, a domain that dictates the subtle transition between the innate and the adaptative immune response. The antimicrobial mechanisms of phagocytic cells are largely described here, including antimicrobial peptides, in often overlapping chapters. This does not matter at all because, again, the best specialists have gathered to produce a single chapter and the science presented is of the highest quality. So, altogether, this is a splendid contribution that will represent a keystone in the fast moving field of phagocytosis. If this reader had one criticism, it would be the illustrations. For a field that is extremely prone to rich illustrations, figures are generally scarce and grey, and the reproduction of the electron microscopy images is generally poor in definition, brightness and contrast. This should not deter anyone interested in the field from acquiring this volume and its brother volume on interactions with microbes. No doubt this, for the years to come, will be a reference text for phagocytosis. Microbiologists, immunologists and cell biologists, both students and senior scientists will find here updated information and all the relevant and most recent references (up to 2500).


2016 ◽  
Vol 11 (4) ◽  
pp. 237
Author(s):  
Ewa Kozerska ◽  
Tomasz Scheffler

Edward Muszalski’s Idea of National Private LawSummary The paper presents the views of Polish lawyer Edward Muszalski on the state of private law in Europe and Poland of the interwar period and his proposals for changes. Muszalski assumed that the law was shaped by two schools of thought : liberal and socialist. In the 18th and 19th century the liberal school dominated, the result of which was the creation of the Napoleonic Code and the BGB. In the 19th century, socialism also influenced the law, which resulted in the creation of labor legislation and trade unions. In the 20th century, the bad qualities of both schools came together in the law of the Soviet Union. However it was possible to combine the good qualities of liberal and socialist law by assuming that the fundamental category of private law is the nation. According to Muszalski, national private law assumes, among others, the dominance of common law over statues, limitation of property rights, strengthening of family stability, limiting rights of will making and abandoning the principle of the will of the parties as the basis for interpreting contracts. Attempts to create national private law were made in Germany under the rule of Hitler and in Italy under the rule of Mussolini. However in both cases full-range law reforms failed, and in both countries private law remains liberal.


Author(s):  
Robert Abbey ◽  
Mark Richards

Property Law is a companion that guides through the intricacies of the conveyancing process. Drawing on practical experience of legal practice, with a residential and a commercial conveyancing focus, the volume offers explanations of often complex processes. The title contains practical guidance on how to approach each stage of a conveyancing transaction in practice. This edition has been fully updated with recent developments in the law, including discussion of ‘Help to buy’ shared ownership schemes, coverage of the Land Transaction Tax, and updated tax rates and chargeable amounts for enveloped dwellings.


2011 ◽  
Vol 13 (2) ◽  
pp. 182-197 ◽  
Author(s):  
Anna Gianfreda

Religious offences in Italy, as in many European countries, have a long and complex history that is intertwined with the events in the history of the relationship between church and state and the institutional and constitutional framework of a nation.This article is divided into three parts. The first part aims to offer some historical remarks concerning the rules on the contempt of religion and blasphemy in Italian criminal law from the end of the 19th century to the present day. The second part focuses on changes to the law on vilification introduced in 2006 and the third part deals with the recent developments in blasphemy law in the context of sport.The article shows that, on the one hand, reforms of the offences grouped under vilification of religion are anachronistic and do not stand up against the religious freedom of individuals, yet on the other, despite the traditional rules for the protection of religion being considered obsolete, they are applied in new areas of law, for example sport, and are used to curb bad manners and bad behaviour. The relationship between the new functions of these criminal rules and the traditional ones, however, remains uncertain and fluctuating, and reveals a moralistic approach to religious offences.


2006 ◽  
Vol 84 (2) ◽  
pp. 225-241 ◽  
Author(s):  
M Manuel

The most recent advances concerning the phylogeny and evolution of calcareous sponges (Calcarea or Calcispongia) are reviewed here, in the light of the history of taxonomy of the group and conceptions about its evolution, starting from Haeckel's works at the end of the 19th century. Calcisponge phylogeny has recently started to be addressed using modern tools of phylogenetic reconstruction: cladistic analysis of morphological characters and molecular phylogeny (so far using 18S and 28S rDNA sequences). The monophyly of calcareous sponges is strongly supported in these works, as is their subdivision into two clades, Calcinea (whose proposed synapomorphy is the basal position of nuclei in choanocytes, with no relation to the flagella) and Calcaronea (whose possible synapomorphy is the formation of the amphiblastula larva through the original process of eversion of the stomoblastula). While the molecular phylogeny of Calcinea is still in its infancy because of insufficient taxonomic sampling, several lines are emerging for the phylogeny of Calcaronea, and these are in strong disagreement with the classification issued from the "traditional" morphological approach. Phylogenetic hypotheses also permit the reconstruction of morphological character evolution, which appears complex and subject to a high level of homoplasy.


Sign in / Sign up

Export Citation Format

Share Document