Peter W. Barlow – författare
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19 produkter
19 produkter
Inbunden, Engelska, 2006
1 631 kr
Skickas inom 10-15 vardagar
he biological sciences are dominated by the idea that cells are the functionally autonomous, physically separated, discrete units of life. TThis concept was propounded in the 19th century by discoveries of the cellular structuring of both plants and animals. Moreover, the ap parent autonomy of unicellular eukaryotes, as well as the cellular basis of the mammalian brain (an organ whose anatomy for a long while defied attempts to validate the idea of the cellular nature of its neurons), seemed to provide the final conclusive evidence for the completeness of *cell theory', a theory which has persisted in an almost dogmatic form up to the present day. However, it is very obvious that there are numerous observations which indicate that it is not the cells which serve as the basic units of biological life but that this property falls to some other, subcellular assemblage. To deal with this intricate problem concerning the fundamental unit of living matter, we proposed the so-called Cell Body concept which, in fact, devel ops an exceedingly original idea proposed by Julius Sachs at the end of the 19th century. In the case of eukaryotic cells, DNA-enriched nuclei are intimately associated with a microtubular cytoskeleton. In this configuration—as a Cell Body—these two items comprise the fundamental functional and struc tural unit of eukaryotic living matter. The Cell Body seems to be inherent to all cells in all organisms.
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PDF, Engelska, 20071 977 kr
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he biological sciences are dominated by the idea that cells are the functionally autonomous, physically separated, discrete units of life. TThis concept was propounded in the 19th century by discoveries of the cellular structuring of both plants and animals. Moreover, the ap parent autonomy of unicellular eukaryotes, as well as the cellular basis of the mammalian brain (an organ whose anatomy for a long while defied attempts to validate the idea of the cellular nature of its neurons), seemed to provide the final conclusive evidence for the completeness of *cell theory'', a theory which has persisted in an almost dogmatic form up to the present day. However, it is very obvious that there are numerous observations which indicate that it is not the cells which serve as the basic units of biological life but that this property falls to some other, subcellular assemblage. To deal with this intricate problem concerning the fundamental unit of living matter, we proposed the so-called Cell Body concept which, in fact, devel ops an exceedingly original idea proposed by Julius Sachs at the end of the 19th century. In the case of eukaryotic cells, DNA-enriched nuclei are intimately associated with a microtubular cytoskeleton. In this configuration—as a Cell Body—these two items comprise the fundamental functional and struc tural unit of eukaryotic living matter. The Cell Body seems to be inherent to all cells in all organisms.
Del 37 - Developmental and Cell Biology Series
Neuronal Growth Cones
Häftad, Engelska, 2005
565 kr
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'I had the good fortune to behold for the first time that fantastic ending of the growing axon. In my sections of the spinal cord of the three day chick embryo, this ending appeared as a concentration of protoplasm of conical form, endowed with amoeboid movements. It could be compared with a living battering ram, soft and flexible, which advances, pushing aside mechanically the obstacles which it finds in its path, until it reaches the region of its peripheral termination. This curious terminal club, I christened the growth cone.' (Santiago Ramón y Cajal, Recollections of My Life, 1937). In Neuronal Growth Cones, Phillip Gordon-Weeks presents the molecular biology of the behavior of growth cones. The book covers the basic morphology and behavior of growth cones, motility and neurite extension via the growth cone cytoskeleton, pathfinding, intracellular signalling, and synaptogenesis. It is the first detailed, critical analysis of all aspects of growth cone biology.
Del 33 - Developmental and Cell Biology Series
Volvox
A Search for the Molecular and Genetic Origins of Multicellularity and Cellular Differentiation
Häftad, Engelska, 2005
980 kr
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The central thesis of this book is that Volvox and its unicellular and colonial relatives provide a wholly unrivalled opportunity to explore the proximate and ultimate causes underlying the evolution, from unicellular ancestors, of multicellular organisms with fully differentiated cell types. A major portion of the book is devoted to reviewing what is known about the genetic, cellular and molecular basis of development in the most extensively studied species of Volvox: V. cateri, which exhibits a complete division of labour between mortal somatic cells and immortal germ cells. However, this topic has been put in context by first considering the ecological conditions and cytological preconditions that appear to have fostered the evolution of organisms of progressively increasing size and with progressively increasing tendency to produce terminally differentiated somatic cells. The book concludes by raising the question of whether the germensoma dichotomy may have evolved by similar or different genetic pathways in different species of Volvox. Biologists and phycologists interested in development, genetics and cellular evolution will find this a fascinating work.
Del 25 - Developmental and Cell Biology Series
Pattern Formation in Plant Tissues
Häftad, Engelska, 2005
708 kr
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Plants are an advantageous group for the consideration of the development of biological form. Plants share most aspects of cell biology with other organisms, yet their embryonic development continues throughout their life, their cells do not move relative to each other and their structure is relatively simple. The chapters in this book are centred around the structure of tissues and its purpose is to try and predict what should be looked for at a molecular level so as to account for observable forms. Each chapter deals with a defined problem such as the role of hormones as correlative agents, tissue polarization, apical meristems and cell lineages. The final chapter develops an alternative approach to the problem of the specification of biological form, that of 'epigenetic selection'. The chapters are centred around the structure of tissues, an intermediate and neglected level between overt morphology and biochemistry, and will be of great interest to all those engaged in attempting to understand the principles behind plant development.
Del 19 - Developmental and Cell Biology Series
Organogenesis of the Kidney
Häftad, Engelska, 2006
617 kr
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This description of a model system for cell differentiation and organogenesis is written by one of the foremost researchers in the area. The main emphasis is on the mammalian kidney, but the book also deals with the development of the transien excretory organs. It includes discussions of induction, proliferation, early cytodifferentiation and morphogenesis and organogenesis. This authoritative account will be valuable to developmental biologists and also to scientists working in paediatric nephrology. As it gives the background of normal development and of control systems, it will also be of use to nephrologists working on abnormalities in the urinary tract.
Del 19 - Developmental and Cell Biology Series
Organogenesis of the Kidney
Inbunden, Engelska, 1987
1 370 kr
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This description of a model system for cell differentiation and organogenesis is written by one of the foremost researchers in the area. The main emphasis is on the mammalian kidney, but the book also deals with the development of the transien excretory organs. It includes discussions of induction, proliferation, early cytodifferentiation and morphogenesis and organogenesis. This authoritative account will be valuable to developmental biologists and also to scientists working in paediatric nephrology. As it gives the background of normal development and of control systems, it will also be of use to nephrologists working on abnormalities in the urinary tract.
Del 28 - Developmental and Cell Biology Series
Kinetic Theory of Living Pattern
Inbunden, Engelska, 1993
1 253 kr
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Development of the shapes of living organisms and their parts is a field of science in which there are no generally accepted theoretical principles. What form these principles are likely to take, when they emerge, is a subject in which there is a wide gulf of disagreement between physical scientists and experimental biologists. This book contains both an extensive philosophical commentary on this dichotomy in views and an exposition of the type of theory most favoured by physical scientists. In this theory living form is a manifestation of the dynamics of chemical change and physical transport or other physics of spatial communication. The reaction-diffusion theory, as initiated by Turing in 1952 and since elaborated by Prigogine and by Gierer and Meinhardt among others, is discussed in detail at a level that requires a good knowledge of a first course in calculus, but no more than that.
Del 58 - Developments in Plant and Soil Sciences
Structure and Function of Roots
Proceedings of the Fourth International Symposium on Structure and Function of Roots, June 20–26, 1993, Stará Lesná, Slovakia
Inbunden, Engelska, 1995
2 173 kr
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These papers summarize the present status of knowledge related to the structure and function of primary root tissues and their cells, as presented at the Fourth International Symposium on the Structure and Functions of Roots. The organizers assembled leading scientists from all over the world. All five subject areas that were presented at the symposium are covered in the book.
Inbunden, Engelska, 1997
1 090 kr
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Proceedings of the 14th Long Ashton International Symposium: Plant Roots - From Cells to Systems held in Bristol, UK, 13-15 September 1995
Inbunden, Engelska, 2002
1 090 kr
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This volume contains a selection of papers presented at the Rothamsted Millennium Conference "Interactions in the Root Environment - an Integrated Approach". The meeting brought together scientists from a range of disciplines interested in the relationship between soil biology and plant growth, reflected by the contents of the volume. Topics range from root development and nutrient flow, plant-microbe and plant-plant signaling, methods for studying bacterial and fungal diversity, to the exploitation of rhizosphere interactions for biological control of diseases and soil remediation. Authors include many internationally-recognized experts in their field and the contributions range from reviews to research papers. The volume presents a wide-ranging overview of the interactions between plants, microbes and soil. It should prove a useful resource for students and others seeking an introduction to the topic, in addition to scientists already conversant with the area of research.
E-bok
PDF, Engelska, 2013344 kr
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Differential Growth in Plants contains the papers presented at Symposia 2.04 ""Spatial and Temporal Patterns of Development"" and 2.14 ""Movements Based on Differential Flank Growth"" at the XIV Botanical Congress held in Berlin during July 1987. Organized into 10 chapters, this book begins by explaining the differential growth in plants. Some chapters follow on the biophysics of differential growth; the phototropic behavior of hypocotyls and coleoptiles in connection with the distribution of indole-3-acetic acid and of growth-inhibiting substances within them; and the differential growth and hormone redistribution in gravireacting maize roots. Other topics explained include plant movements caused by differential growth; genetic analysis of tropic responses; growth and bending of a cylindrical structure in terms of the distribution of relative growth rates; and differential growth resulting in the specification of different types of cellular architecture in root meristems. This book also elucidates the curving and twinning of stems, as well as the spatio-temporal analysis of flower ontogenesis.
Häftad, Engelska, 2014
1 631 kr
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he biological sciences are dominated by the idea that cells are the functionally autonomous, physically separated, discrete units of life. TThis concept was propounded in the 19th century by discoveries of the cellular structuring of both plants and animals. Moreover, the ap parent autonomy of unicellular eukaryotes, as well as the cellular basis of the mammalian brain (an organ whose anatomy for a long while defied attempts to validate the idea of the cellular nature of its neurons), seemed to provide the final conclusive evidence for the completeness of *cell theory', a theory which has persisted in an almost dogmatic form up to the present day. However, it is very obvious that there are numerous observations which indicate that it is not the cells which serve as the basic units of biological life but that this property falls to some other, subcellular assemblage. To deal with this intricate problem concerning the fundamental unit of living matter, we proposed the so-called Cell Body concept which, in fact, devel ops an exceedingly original idea proposed by Julius Sachs at the end of the 19th century. In the case of eukaryotic cells, DNA-enriched nuclei are intimately associated with a microtubular cytoskeleton. In this configuration—as a Cell Body—these two items comprise the fundamental functional and struc tural unit of eukaryotic living matter. The Cell Body seems to be inherent to all cells in all organisms.
Häftad, Engelska, 2011
2 173 kr
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In 1971, the late Dr. J. Kolek of the Institute of Botany, Bratislava, organized the first International Symposium devoted exclusively to plant roots. At that time, perhaps only a few of the participants, gathered together in Tatranska Lomnica, sensed that a new era of root meetings was beginning. Nevertheless, it is now clear that Dr. Kolek's action, undertaken with his characteristic enormous enthusiasm, was rather pioneering, for it started a series a similar meetings. Moreover, what was rather exceptional at the time was the fact that the meeting was devoted to the functioning of just a single organ, the root. One possible reason for the unexpected success of the original, perhaps naive, idea of a Root Symposium might lie with the fact that plant roots have always been extremely popular as experimental material for cytologists, biochemists and physiologists whishing to probe processes as diverse as cell division and solute transport. Of course, the connection of roots with the rest of the plant is not forgotten either. This wide variety of disciplines is now coupled with the development of increasingly sophisticated experimental techniques to study some of these old problems. These factors undoubtedly contribute to the necessity of continuing the tradition of the root symposia. The common theme of root function gives, in addition, a certain unity to all these diverse activities.
E-bok
PDF, Engelska, 20121 367 kr
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This volume contains a selection of papers presented at the Rothamsted Millennium Conference "Interactions in the Root Environment - an Integrated Approach". The meeting brought together scientists from a range of disciplines interested in the relationship between soil biology and plant growth, reflected by the contents of the volume. Topics range from root development and nutrient flow, plant-microbe and plant-plant signaling, methods for studying bacterial and fungal diversity, to the exploitation of rhizosphere interactions for biological control of diseases and soil remediation. Authors include many internationally-recognized experts in their field and the contributions range from reviews to research papers. The volume presents a timely and wide-ranging overview of the interactions between plants, microbes and soil. It should prove an indispensable resource for students and others seeking an introduction to the topic, in addition to scientists already conversant with the area of research.
Häftad, Engelska, 2012
1 090 kr
Skickas inom 10-15 vardagar
This volume contains a selection of papers presented at the Rothamsted Millennium Conference "Interactions in the Root Environment - an Integrated Approach". The meeting brought together scientists from a range of disciplines interested in the relationship between soil biology and plant growth, reflected by the contents of the volume. Topics range from root development and nutrient flow, plant-microbe and plant-plant signaling, methods for studying bacterial and fungal diversity, to the exploitation of rhizosphere interactions for biological control of diseases and soil remediation. Authors include many internationally-recognized experts in their field and the contributions range from reviews to research papers. The volume presents a timely and wide-ranging overview of the interactions between plants, microbes and soil. It should prove an indispensable resource for students and others seeking an introduction to the topic, in addition to scientists already conversant with the area of research.
Häftad, Engelska, 2012
1 090 kr
Skickas inom 10-15 vardagar
tests the suitability of using mannitol as an osmoticum during experiments. Pressure probe and SiCSA techniques The expanding maize root tip Use of the cell pressure probe (Htisken et aI. , 1978) and single-cell sampling and analysis (SiCSA; Tomos Individual cells expand to many times their ongl- et aI. , 1994) provide an approach to study plant water nal length as they progress from the meristem to the and solute relations at the resolution of the individual mature zone of root tips. The expansion first accel- cell. In the case of water relations, the pressure probe erates and then decelerates, stopping at the proximal provides the only technique that measures cell tur- end of the expansion zone (Pritchard, 1994). This is gor pressure, and hence turgor adjustment processes, accomplished at constant ceJl turgor (P) and with a loss directly. In some cases, such as the motor cells of pul- of osmotic (7l'j) pressure in the order of 15% (wheat: vini or in the stomatal complex, turgor varies between Tomos et aI. , 1989; maize: Pritchard et aI. , 1993; adjacent cells - making analysis at single cell resolu- Pritchard and Tomos, 1993).The constant turgor indi- tion essential for understanding mechanisms (Irving et cates that changes in cell-wall mechanical properties, aI. , 1994). Correlating turgor pressure measurements rather than driving force, are responsible for the imme- with cell expansion rate permits unique measurement diate control of expansion-rate in roots (Pritchard et aI.
E-bok
PDF, Engelska, 20121 367 kr
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E-bok
PDF, Engelska, 20132 765 kr
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In 1971, the late Dr. J. Kolek of the Institute of Botany, Bratislava, organized the first International Symposium devoted exclusively to plant roots. At that time, perhaps only a few of the participants, gathered together in Tatranska Lomnica, sensed that a new era of root meetings was beginning. Nevertheless, it is now clear that Dr. Kolek''s action, undertaken with his characteristic enormous enthusiasm, was rather pioneering, for it started a series a similar meetings. Moreover, what was rather exceptional at the time was the fact that the meeting was devoted to the functioning of just a single organ, the root. One possible reason for the unexpected success of the original, perhaps naive, idea of a Root Symposium might lie with the fact that plant roots have always been extremely popular as experimental material for cytologists, biochemists and physiologists whishing to probe processes as diverse as cell division and solute transport. Of course, the connection of roots with the rest of the plant is not forgotten either. This wide variety of disciplines is now coupled with the development of increasingly sophisticated experimental techniques to study some of these old problems. These factors undoubtedly contribute to the necessity of continuing the tradition of the root symposia. The common theme of root function gives, in addition, a certain unity to all these diverse activities.