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1.
Conclusion Packard attempted to incorporate cave fauna into a general theory of evolution that would be consistent with the principle of recapitulation, and would have as the primary mechanism the inheritance of the effects of the environment. Beyond this, he also attempted to demonstrate that the evolution of cave fauna was consistent with progressive evolution. The use he made of comparative anatomy and embryology places him within the tradition of classical morphology that was dominant through much of the last half of the nineteenth century, but of waning importance by the time of Packard's death in 1905. The importance Packard gave to cave fauna as evidence for Lamarckian evolution stimulated interest in the phenomenon; this interest, and references to cave fauna in the scientific literature, declined after his death. Since then, the importance of cave fauna in evolutionary theory has declined from their status as the star evidence in Packard's theory to their present status as a difficult anomaly within the modern synthetic theory.  相似文献   

2.
A short list of the twentieth century's dominant figures in photosynthesis would unquestionably include Otto Warburg. One of his many discoveries, the `bicarbonate effect' remains a lasting puzzle to his heirs in the field. Recent developments in this area of research have renewed interest and call for a re-examination of the ideas surrounding this controversial topic. Focus here will be on hypotheses developed by a small number of researchers who proposed that bicarbonate may be involved in oxygen evolution. The effect of bicarbonate on the acceptor side of Photosystem II (PS II) is discussed by Jack van Rensen (in this issue). This revised version was published online in June 2006 with corrections to the Cover Date.  相似文献   

3.
The 19th-century American physician Oliver Wendell Holmes (1809-1894) is known, internationally, more for his literary output than for his contributions to medical science. Yet a single paper he wrote in 1843--"The Contagiousness of Puerperal Fever"--has made him a hero in the eyes of many (especially in the United States) of the struggle against that scourge. Why that one article, written when Holmes was still in his thirties, should--even in its expanded 1855 version--so routinely be referred to as a "classic of medical literature", and why its author should have been raised on such a high pedestal that some grant him a position beside Ignác Semmelweis, are complicated questions. This present paper is an attempt to begin assessing what it is that makes someone a medical hero by looking at three different aspects of Holmes's early career. He was even as a young man a poet and a physiologist/anatomist as well as the author of this important essay. Whether and how those three features of Holmes's many-sides public persona are connected is discussed as a prelude to considering whether his work on puerperal fever legitimates his status as a medical hero.  相似文献   

4.
During the early- to mid-twentieth century, a bitter controversy raged among researchers on photosynthesis regarding the minimum number of light quanta required for the evolution of one molecule of oxygen. From 1923 until his death in 1970, Otto Warburg insisted that this value was about three or four quanta. Beginning in the late 1930s, Robert Emerson and others on the opposing side consistently obtained a value of 8–12 quanta. Warburg changed the protocols of his experiments, sometimes in unexplained ways, yet he almost always arrived at a value of four or less, except eight in carbonate/bicarbonate buffer, which he dismissed as “unphysiological”. This paper is largely an abbreviated form of the detailed story on the minimum quantum requirement of photosynthesis, as told by Nickelsen and Govindjee (The maximum quantum yield controversy: Otto Warburg and the “Midwest-Gang”, 2011); we provide here a scientific thread, leaving out the voluminous private correspondence among the principal players that Nickelsen and Govindjee (2011) examined in conjunction with their analysis of the principals’ published papers. We explore the development and course of the controversy and the ultimate resolution in favor of Emerson’s result as the phenomenon of the two-light-reaction, two-pigment-system scheme of photosynthesis came to be understood. In addition, we include a brief discussion of the discovery by Otto Warburg of the requirement for bicarbonate in the Hill reaction.  相似文献   

5.
Conclusion It should be clear by now the extent to which many features of Thorpe's interpretation of animal behavior and of the animal mind rested, at bottom, not simply on conventional scientific proofs but on interpretive inferences, which in turn rested on a willingress to make extensions of human experience to animals. This, in turn, rested on his view of evolution and his view of reality. And these were governed by his natural theology, which was the fundamental stratum of his intellectual experience.Contrary to the scientific ethos, which restricts theory choice to scientific issues alone, Thorpe's career suggests that the actual reasons for theory choice among scientists often are not limited to science, but are multiple and may sometimes be difficult to discover. It is largely because Thorpe took a public part in the natural theology enterprise that we can know something about his religious beliefs and so can see their probable influence on his scientific decisions. Similar beliefs of other scientists are sometimes harder to get at. Most may be practically beyond discovery, for the ethos of science has discouraged public professions of personal belief in relation to scientific work.101 Yet does it seem plausible that, for example, the restriction of self-consciousness to humans by some scientists is a purely scientific decision?102 Surely not, any more than that the strong influence of natural theology on Thorpe's thought means that he was not a good scientist. His natural theology may have led him into incautious enthusiasms regarding the animal mind — such as the potential if unrealizable linguistic ability of chimpanzees — through a bias in favor of the continuity of emergents in a progressive evolutionary system, just as it led him to advocate animal consciousness long before the recent upsurge of interest, but the scientific integrity of his work overall is unimpeachable. And yet, that work is not comprehensible historically as science alone. Personal philosophy must not be discounted in writing the history of recent science. This somewhat obvious conclusion (obvious to historians of science) needs emphasis, for we are still prone to think that the sciences of our own time provide their own internal dynamic that is in itself sufficient to account for their content and development.  相似文献   

6.
A bitter controversy had existed as to the minimum number of quanta required for the evolution of one molecule of oxygen in photosynthesis: Otto Warburg had insisted since 1923 that this value was 3–4, whereas Robert Emerson and others continued to obtain a value of 8–12 since the 1940s. It is shown in this letter that the 1931 Nobel-laureate of Physiology & Medicine Otto Warburg published, in his last and final paper, just before his death in 1970, a measured minimum quantum requirement of oxygen evolution of 12 at the lowest intensities of light he used. Although using his theory on photolyte, Warburg calculated a value of 3–4 for the quantum requirement, this is the first confirmation by Warburg of the higher measured quantum requirement. However, it has remained unknown to most investigators. It is expected that this information will be of general interest not only to those interested in the history and research on photosynthesis, but to the entire sci entific community, especially the writers of text books in biology, biochemistry and biophysics.  相似文献   

7.
Not so long ago I happened to treat a Jewish eighth-grade gymnasium student brought to Petrograd from a province. It was fall and the following spring he was to take his qualifying examinations. The young man, who belonged to a prosperous family, had brilliant abilities and graduated from each class with excellent grades—what would you think his illness was? He suffered—in his own words—from the throes of creative writing. Days and nights he poured over a notebook with his compositions in search of the best form to express his thoughts. Only after applying incredible efforts could one tear him away from his note-books and send him to bed at five or six o'clock in the morning, and this happened on a daily basis. With each day his mental health grew worse. It was clear that the young man undermined his health by overstudying, and that he had reached the point where he needed to worry about his health, not his studies, because a serious mental illness was descending upon him. The young man was well liked by everyone in his high-school. The teachers considered him the best student, and having learned about his illness, they promised to petition to grant him the right to graduate from school without the final examination and with a certificate of excellent. But none of that helped. The young man could not relax, spending days and nights over his compositions and constantly tormenting himself with his "throes of creative writing."  相似文献   

8.
John Gurdon has made major contributions to developmental biology in addition to his Nobel prize winning work on nuclear reprogramming. With the frog, Xenopus, as a vertebrate model, his work on mesoderm induction led him to identify a community effect required for tissue differentiation after progenitor cells have entered a specific mesodermal programme. It is in the context of this biologically important concept, with myogenesis as an example, that we have had most scientific exchanges. Here I trace my contacts with him, from an interest in histone regulation of gene expression and reprogramming, to myogenic determination factors as markers of early mesodermal induction, to the role of the community effect in the spatiotemporal control of skeletal muscle formation. I also recount some personal anecdotes from encounters in Oxford, Paris and Cambridge, to illustrate my appreciation of him as a scientist and a colleague.  相似文献   

9.
Julian Huxley’s (1887–1975) contribution to twentieth-century biology and science popularisation is well documented. What has not been appreciated so far is that despite Huxley’s eminence as a public scientific figure and the part that he played in the rise of experimental zoology in Britain in the 1920s, his own research was often heavily criticised in this period by his colleagues. This resulted in numerous difficulties in getting his scientific research published in the early 1920s. At this time, Huxley started his popular science career. Huxley’s friends criticised him for engaging in this actively and attributed the publication difficulties to the time that he allocated to popular science. The cause might also have its roots in his self-professed inability to delve deeply into the particularities of research. This affected Huxley’s standing in the scientific community and seems to have contributed to the fact that Huxley failed twice in the late 1920s to be elected to the Royal Society. This picture undermines to some extent Peter J. Bowler’s recent portrayal of Huxley as a science populariser.  相似文献   

10.
The author discusses first of all the theoretical principles of the evolutionary myology and gives a detailed explanation on the 3 types of studies included in this complex method. The investigated material is distributed into 3 groups, which correspond to the above mentioned 3 types of studies: 1. The variations of the muscles, object of research, are studied on 200 upper limbs of adults and cn 100 limbs of human fetuses. The crown to heel length of the latter and the number of the studied limbs could be seen on the Table on page 823. 2. The comparative-anatomic research is performed on 122 limbs of animals. The different species of animals as well as the number of the examined limbs are given on the table on page 824. 3. The organogenetic material includes 18 upper limbs of human embryos and fetuses, the age of which could be seen on the table on page 825. After expressing his gratitute to all, who have assisted him in his work the author gives the already known literature data related to the phylogenesis and ontogenesis of the muscles studied by him. His own investigations start with searching of m. extensor digitorum in man, as special attention is paid both to the muscles' bellies and their tendons and the connexus intertendinei.  相似文献   

11.
In this paper, I analyze George Gaylord Simpson's response to the molecularization of evolutionary biology from his unique perspective as a paleontologist. I do so by exploring his views on early attempts to reconstruct phylogenetic relationships among primates using molecular data. Particular attention is paid to Simpson's role in the evolutionary synthesis of the 1930s and 1940s, as well as his concerns about the rise of molecular biology as a powerful discipline and world-view in the 1960s. I argue that Simpson's belief in the supremacy of natural selection as the primary driving force of evolution, as well as his view that biology was a historical science that seeks ultimate causes and highlights contingency, prevented him from acknowledging that the study of molecular evolution was an inherently valuable part of the life sciences.  相似文献   

12.
The German-born American scientist Jacques Loeb (1859-1924) was one of the most important promoters of experimental biology around 1900. He was best known for his physico-chemical explanations of psychological processes and his biotechnological approach to artificial parthenogenesis. At the start of the First World War, Loeb was deeply troubled by the deterioration of the international scientific community and the growing alienation of his German and American colleagues. The aim of this paper is to examine Jacques Loeb's activities aimed at advancing scientific internationalism before, during, and after the war. Loeb, for example, tried to negotiate the publication of German authors in American journals during the war, at a time when this was categorically rejected by publishers. Immediately after the war, he tried to create a specific system aimed at disseminating scientific literature and funding selected European colleagues, in order to overcome what he considered reactionary and hegemonic forces within German scientific institutions. His correspondence with eminent scientists from all over the world (amongst them Albert Einstein, Richard Goldschmidt, Otto Meyerhof, Otto Warburg, Paul Ehrlich, Wolfgang Ostwald, Wilhelm Roux, and Ross Harrison) will serve as a source for the analysis. Special emphasis will be placed on the question how Jacques Loeb integrated epistemology, his particular world view, and his social commitment into the workings of his own life and how he tried to extend his scientific goal of controlling biological systems to the sphere of international science.  相似文献   

13.
The unparalleled plant explorations of the British botanist Richard Spruce in the Amazon Valley and the northern Andes from 1849 to 1864 are now well known in scientific circles. What is not so widely recognized, however, is the depth of philosophy characteristic of this man, a depth of philosophy nurtured especially during his many years of living alone in closest association with nature in the forests of South America.  相似文献   

14.
A smile comes easily to the face of Anthony Fauci, Director of the National Institute of Allergy and Infectious Diseases, as he encounters visitors to his offices at the Institute. He does not, however, allow himself to be distracted from his duties for longer than it takes to nod warmly. The sense of discipline and the determination and preparedness that were instilled in him through a Jesuit course of education are apparent. He is as direct and as clear spoken in person as you've seen him on television, speaking on innumerable occasions over the past two decades about the pathology and treatment of AIDS, and more recently, delineating the public health from the national security issues precipitated by the bioterrorist events of the past year. The three office assistants who occupy his reception area have been particularly taxed in the management of Fauci's schedule since 9/11; as they pause briefly from their work to share photographs of a friend's recent wedding, Fauci is there to admonish them, semi-good-naturally, as government employees, to return to their official duties. He has been meeting with high government officials and has been courted by the media for interviews regularly since the tragedies began. Given his high profile, it is easy to forget that Fauci is, foremost, a clinical immunobiologist and physician. His dedication to science is part of his commitment to public service, also a value instilled in him by the Jesuits. Fortunately for all of us, Fauci was pursuing this combination of interests--within the venue of bioterrorism--in his official capacity at the NIAID well before the general public had awaken to the threat.  相似文献   

15.
W R Adey 《Bio Systems》1977,8(4):163-178
The past decade has seen a growing understanding of functional capacities and structural organization of cell membranes. Studies in immunology, endocrinology and neurobiology have led to some unifying concepts about processes of transduction at the membrane surface, and the coupling of surface events to the interior of the cell. My interest in these problems has been directed in no small measure by interactions with Lars Onsager. His kindly tutelage and rigorous criticism have been a source of endless encouragement to those who sought the full measure of his wisdom in the difficult area of the energetics of membrane excitation. Onsager's unflagging interest in mechanisms of ion transportation led him to earnest consideration of a variety of non-classical models of conduction in proteins, always tempered by his deep insight essential aspects of physical chemistry. My discussions with him at the MIT Neuroscience Research Program were a regular stimulus to the experiments which our groups have undertaken in search of answers to questions raised by the models presented here. Above all, Lars Onsager was a kindly, gentle man. In this personal example, he will be as sadly missed as for his broad and imaginative approach to critical questions in the physical and biological sciences.  相似文献   

16.
During the 1840s and the 1850s botanist Joseph Hooker developeddistinct notions about the proper characteristics of aprofessional man of science. While he never articulated theseideas publicly as a coherent agenda, he did share his opinionsopenly in letters to family and colleagues; this privatecommunication gives essential insight into his and his X-Clubcolleagues' public activities. The core aspiration of Hooker'sprofessionalization was to consolidate men of science into adutiful and centralized community dedicated to nationalwell-being. The nation in turn owed the scientific community forits ministration. When the government bestowed funds and statuson men of science it was rewarding science – not purchasing it. His proposed reforms were piecemeal, immediate, and above allpractical. He harbored no taste for vast millenariantransformation, and rested his conception of scientificprofessionalism upon a respectable High Victorian foundation ofpatronage and pillars of duty, reciprocity, intimacy, andinequality. The process of professionalization he envisioned wasas much shrewd compromise between existing interests as avindication of principle. His power and prestige from themid-1850s onward gave him considerable ability to carry out hisreform program, although his general success did occasion someundesired consequences for the status of natural-historypursuits. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

17.
Professor Mirko Drazen Grmek (Krapina 1924--Paris 2000) was one of the most prominent Croatian scientists. Work in history of science directed him to the crossroads of various fields placing his approach in anthropological perspective. Two models will serve as illustrations of his main theories. The historical reconstruction of scientific discovery (mostly on examples of 17th century) will be presented as well as Grmek's ideas on a concept of disease. The introduction of the term "memoricide" within his activities during aggression on Croatia is mentioned.  相似文献   

18.
In August of this year, our regular author V.P. Zinchenko celebrated his sixtieth birthday. The editorial board asked him to give an interview about his view of the contemporary science of psychology. Vladimir Petrovich preferred a series of articles on the eternal problems of developmental psychology. We publish the first of these articles, written in the genre of an essay on scientific themes, in this journal issue. But the editorial board did not abandon its request, and hopes that his interview on the science of psychology will be published in the journal. The editorial board congratulates V.P. Zinchenko on his birthday and wishes him success in his scientific work.  相似文献   

19.
Over years of friendly meetings with Professor Aharon Katzir-Katchalsky, many topics of mutual interest were discussed. He was the ideal person to come to with a problem. After being subjected to his critical, analytic mind, most research problems seemed simple, more clearly defined and understandable. His broad biologic and scientific background grew from an apparently insatiable interest in all natural phenomena. He generously shared his knowledge and imparted his wisdom with a share of his own infectious excitement. He was quick to sense the significance of understanding of biological processes to their practical application. For this reason it seems appropriate to relate the progress made in the understanding of cell volume regulation, which had been discussed on several occasions with him, to its possible significance as a factor in disease processes.Dr. Frega is a Fellow of the National Kidney Foundation, Inc., 1972–73.  相似文献   

20.
This paper was presented before a meeting of plaintiffs'' attorneys, including those who specialize in malpractice actions against physicians—the National Association of Claimants'' Compensation Attorneys (NACCA).Doctor Eastman is known internationally for his contribution in the field of obstetrics. In recent years his interests have led him into the field of forensic obstetrics, a complex and difficult subject. Some of these problems are explored by Dr. Eastman in this paper and his comments will be of interest to physicians and attorneys.It is to be hoped that NACCA members benefited by this accurate and scientific presentation.  相似文献   

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