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Book reviewed in this article: Takashi Irimoto and Takako Yamada (eds). Circumpolar Ethnicity and Identity.  相似文献   

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Humans and beetles both have a species-specific Umwelt circumscribed by their sensory equipment. However, Ladislav Kováč argues that humans, unlike beetles, have invented scientific instruments that are able to reach beyond the conceptual borders of our Umwelt.You may have seen the film Microcosmos, produced in 1996 by the French biologists Claude Nuridsany and Marie Perrenou. It does not star humans, but much smaller creatures, mostly insects. The filmmakers'' magnifying camera transposes the viewer into the world of these organisms. For me, Microcosmos is not an ordinary naturalist documentary; it is an exercise in metaphysics.One sequence in the film shows a dung beetle—with the ‘philosophical'' generic name Sisyphus—rolling a ball of horse manure twice its size that becomes stuck on a twig. As the creature struggles to free the dung, it gives the impression that it is both worried and obstinate. As we humans know, the ball represents a most valuable treasure for the beetle: it will lay its eggs into the manure that will later feed its offspring. The behaviour of the beetle is biologically meaningful; it serves its Darwinian fitness.Yet, the dung beetle knows nothing of the function of manure, nor of the horse that dropped the excrement, nor of the human who owned the horse. Sisyphus lives in a world that is circumscribed by its somatic sensors—a species-specific world that the German biologist and philosopher Jakob von Uexküll would have called the dung beetle''s ‘Umwelt''. The horse, too, has its own Umwelt, as does the human. Yet, the world of the horse, just like the world of the man, does not exist for the beetle.If a ‘scholar'' among dung beetles attempted to visualize the world ‘out there'', what would be the dung-beetles'' metaphysics—their image of a part of the world about which they have no data furnished by their sensors? What would be their religions, their truths, or the Truth—revealed, and thus indisputable?Beetles are most successful animals; one animal in every four is a beetle, leading the biologist J.B.S. Haldane to quip that the Creator must have “had an inordinate fondness for beetles”. Are we humans so different from dung beetles? By birth we are similar: inter faeces et urinas nascimur—we are born between faeces and urine—as Aurelius Augustine remarked 1,600 years ago. Humans also have a species-specific Umwelt that has been shaped by biological evolution. A richer one than is the Umwelt of beetles, as we have more sensors than have they. Relative to the body size, we also possess a much larger brain and with it the capacity to make versatile movements with our hands and to finely manipulate with our fingers.This manual dexterity has enabled humans to fabricate artefacts that are, in a sense, extensions and refinements of the human hand. The simplest one, a coarse-chipped stone, represents the evolutionary origins of artefacts. Step-by-step, by a ratchet-like process, artefacts have become ever more complicated: as an example, a Boeing 777 is assembled from more than three million parts. At each step, humans have just added a tiny improvement to the previously achieved state. Over time, the evolution of artefacts has become less dependent on human intention and may soon result in artefacts with the capacity for self-improvement and self-reproduction. In fact, it is by artefacts that humans transcend their biology; artefacts make humans different from beetles. Here is the essence of the difference: humans roll their artefactual balls, no less worried and obstinate than beetles, but, in contrast to the latter, humans often do it even if the action is biologically meaningless, at the expense of their Darwinian fitness. Humans are biologically less rational than are beetles.Artefacts have immensely enriched the human Umwelt. From among them, scientific instruments should be singled out, as they function as novel, extrasomatic sensors of the human species. They have substantially fine-grained human knowledge of the Umwelt. But they are also reaching out—both to a distance and at a rate that is exponentially increasing—behind the boundary of the human Umwelt, behind its conceptual confines that we call Kant''s barriers. Into the world that has long been a subject of human ‘dung-beetle-like'' metaphysics. Nevertheless, our theories about this world could now be substantiated by data coming from the extrasomatic sensors. These instruments, fumbling in the unknown, supply reliable and reproducible data such that their messages must be true. They supersede our arbitrary guesses and fancies, but their truth seems to be out of our conceptual grasp. Conceptually, our mind confines us to our species-specific Umwelt.We continue to share the common fate of our fellow dung beetles: There is undeniably a world outside the confinements of our species-specific Umwelt, but if the world of humans is too complex for the neural ganglia of beetles, the world beyond Kant''s barriers may similarly exceed the capacity of the human brain. The physicist Richard Feynman (1965) stated, perhaps resignedly, “I can safely say that nobody today understands quantum mechanics.” Frank Gannon (2007) likewise commented that biological research, similarly to research in quantum mechanics, might be approaching a state “too complex to comprehend”. New models of the human brain itself may turn out to be “true and effective—and beyond comprehension” (Kováč, 2009).The advances of science notwithstanding, the knowledge of the universe that we have gained on the planet Earth might yet be in its infancy. However, in contrast to the limited capacity of humans, the continuing evolution of artefacts may mean that they face no limits in their explorative potential. They might soon dispense with our conceptual assistance exploring the realms that will remain closed to the human mind forever.  相似文献   

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To define genes associated with the pigmentary disorder vitiligo, gene expression was compared in non‐lesional melanocytes cultured from three vitiligo patients and from three control melanocyte cultures by differential display. A basic local alignment search tool search did not reveal homology of six differentially expressed cDNA fragments to previously identified expressed sequence tags; thus, one was used to screen a melanocyte cDNA library. The underlying VIT1 gene maps to chromosome 2p16. The 3′ portion of the VIT1 message is complementary to the 3′ end of hMSH6 mRNA, enabling the formation of RNA–RNA hybrids, which may interfere with G/T mismatch repair function. Moreover, the aligned cDNA sequence revealed an open reading frame identical to a hypothetical protein expressed in brain, with a similarity to Drosophila calmodulin, and containing a zinc‐finger motif partially identical to N‐recognin. Expression of ORF mRNA was confirmed for multiple skin cell types, suggesting its importance for skin physiology.  相似文献   

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This article addresses a classic ethnographic problem in the study of Italy: how is it that people can subscribe simultaneously to seemingly contradictory ideologies, such as Catholicism and Communism? It does so by describing examples from Italy's ‘showcase city’ of the left, ‘Red Bologna’, in which to be ‘red’ is ubiquitous but each person's ‘red’ is a different thing: being ‘red’ (differently) is the idiom in which real political distinctions are expressed over issues like religion or immigration. In parallel, I discuss the relationship between the ‘field’ as a location and the ‘field’ as a conceptual topic. My account replicates internal ethnographic differences at the analytical level by highlighting the differences between being left‐wing in Bologna and its meaning as a concept in anthropology. Hence the ‘equivocal location’: a field‐site that is productively different, from what an inexperienced ethnographer expected from it, from conceptual discussions in anthropology, and from itself.  相似文献   

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A simple spectrofluorometric procedure has been devised to determine serum antibodies, directed to constituents of the myelin sheath. It is an adaptation of the indirect immunofluorescent technique. A suspension of highly purified bovine myelin is incubated successively with a test rabbit serum and fluoresceinisothiocyanate-conjugated anti-rabbit gamma-globulin. Intensity of fluorescence in the final myelin suspension is determined spectrofluorometrically. Sera from rabbits with experimental allergic encephalomyelitis, induced by whole bovine spinal cord, generally gave fluorescence at least 10 times that of normal rabbit serum. Fluorescence of sera with high demyelinating activity was more intense than that of sera with equivocal demyelinating activity. The assay is specific for immunoglobulins directed to myelin constituents, organ-specific and species-independent. Rabbit anti-galactosylceramide serum with known demyelinating activity gave high fluorescence similar to that in sera of rabbits inoculated with whole spinal cord. Galactosylceramide could absorb a substantial portion of‘anti-myelin antibodies’of the anti-galactosylceramide serum but it did not absorb‘anti-myelin antibodies’of serum of rabbits with whole tissue-induced experimental allergic encephalomyelitis. This assay system may be useful for further studies of ‘anti-myelin antibodies’.  相似文献   

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In recent years evidence has accumulated that at least some animals can remember the ‘what’, ‘where’ and ‘when’ of personal experiences. Currently, evidence for such ability is taxonomically restricted to birds and mammals. Here, we demonstrate for the first time that cleaner wrasses Labroides dimidiatus are able to remember when they interacted with what after a single event. In nature, cleaners remove ectoparasites from other reef fishes, so‐called clients. Clients are depleted, non‐stationary food patches at the end of an interaction and replenished only after a delay. In our experiments, we presented twelve cleaners every 2.5 min, a choice between two of a total of four plates with different colours and patterns. One plate was always accessible but contained a non‐preferred food item while the other three contained a preferred food item, but allowed a next feeding event only after 5, 10 or 15 min. Thus, to maximise food intake, cleaners had to remember for each choice when they had last interacted with which plate. When confronted with two plates offering preferred food, cleaners showed an overall significant preference for the plate that allowed access during the trial. For six cleaners, the preference was significant. Also, on trials involving the always accessible plate, cleaners discriminated between trials in which they had to eat the non‐preferred food and trials on which they could eat the preferred food. In conclusion, cleaners are able to track the ‘when’ and ‘what’ (or possibly ‘who’) within a biologically meaningful time period.  相似文献   

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Recently, two quite different approaches exemplifying ‘bottom-up’ and ‘top-down’ philosophies have shed new light on basal ganglia function. In vitro work using organotypic co-cultures has implicated the subthalamic nucleus (STN) and the external segment of the globus pallidus (GPe) as pacemakers for low-frequency bursting that is reminiscent of the activity produced in Parkinsonian tremor. A circuit essential for avian song learning has been identified as part of the basal ganglia with surprisingly well conserved cellular details; investigation of this system may help to address general issues of basal ganglia function.  相似文献   

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Pleione ‘Frank Kingdon Ward’ first appeared in collections in the 1950s and has persisted. It has been considered to be a form of the spring flowered Pleione humilis but cytological examination shows it to be a triploid hybrid. Its identity is examined here and a formal hybrid name is proposed for it.  相似文献   

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