scholarly journals Droplet Heating and Evaporation: Recent Developments of Simple Models of Complex Processes

Author(s):  
Sergei S. Sazhin
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.


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.


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).


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.


Author(s):  
Ayeley P. Tchangani

Decision analysis, the mechanism by which a final decision is reached in terms of choice (choosing an alternative or a subset of alternatives from a large set of alternatives), ranking (ranking alternatives of a set from the worst to the best), classification (assigning alternatives to some known classes or categories), or sorting (clustering alternatives to form homogeneous classes or categories) is certainly the most pervasive human activity. Some decisions are made routinely and do not need sophisticated algorithms to support decision analysis process whereas other decisions need more or less complex processes to reach a final decision. Methods and models developed to solve decision analysis problems are in constant evolution going from mechanist models of operational research to more sophisticated and soft computing-oriented models that attempt to integrate human attitude (emotion, affect, fear, egoism, altruism, selfishness, etc.). This complex, soft computing and near human mechanism of problem solving is rendered possible thanks to the overwhelming computational power and data storage possibility of modern computers. The purpose of this chapter is to present new and recent developments in decision analysis that attempt to integrate human judgment through bipolarity notion.


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.


SPARK ◽  
2019 ◽  
Author(s):  
Valeriy I. Bykov ◽  
Svetlana B. Tsybenova ◽  
Gregory Yablonsky

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.


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.


Sign in / Sign up

Export Citation Format

Share Document