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排序方式: 共有201条查询结果,搜索用时 203 毫秒
101.
Thilo Rehren Tamás Belgya Albert Jambon György Káli Zsolt Kasztovszky Zoltán Kis Imre Kovács Boglárka Maróti Marcos Martinón-Torres Gianluca Miniaci Vincent C. Pigott Miljana Radivojević László Rosta László Szentmiklósi Zoltán Szőkefalvi-Nagy 《Journal of archaeological science》2013
The earliest known iron artefacts are nine small beads securely dated to circa 3200 BC, from two burials in Gerzeh, northern Egypt. We show that these beads were made from meteoritic iron, and shaped by careful hammering the metal into thin sheets before rolling them into tubes. The study demonstrates the ability of neutron and X-ray methods to determine the nature of the material even after complete corrosion of the iron metal. The iron beads were strung into a necklace together with other exotic minerals such as lapis lazuli, gold and carnelian, revealing the status of meteoritic iron as a special material on a par with precious metal and gem stones. The results confirm that already in the fourth millennium BC metalworkers had mastered the smithing of meteoritic iron, an iron–nickel alloy much harder and more brittle than the more commonly worked copper. This is of wider significance as it demonstrates that metalworkers had already nearly two millennia of experience to hot-work meteoritic iron when iron smelting was introduced. This knowledge was essential for the development of iron smelting, which produced metal in a solid state process and hence depended on this ability in order to replace copper and bronze as the main utilitarian metals. 相似文献
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Bernadette Bensaude‐Vincent 《Berichte zur Wissenschaftsgeschichte》2009,32(4):365-378
Der Denkstil der Chemiker. Der Aufsatz diskutiert die Tragfähigkeit des Begriffes “Denkstil”, wie er von Alistair Crombie eingeführt und Ian Hacking aufgegriffen wurde, für das Verständnis dessen, wie das Fach Chemie historisch seine Identität ausgeprägt hat. Obwohl weder Crombie noch Hacking den Begriff “Denkstil” in Bezug auf einzelne Disziplinen verwendet haben, erscheint im Fall der Chemie seine Anwendung besonders vielversprechend, weil er hier hilft, ein zentrales Problem zu thematisieren – nämlich die Frage, wie es Chemikern trotz wechselnder Gegenstandsbereiche und theoretischer Umbrüche gelang, eine eigenständige und stabile Identität auszubilden. Nach einer Einführung in den Begriff “Denkstil”, argumentiert der Aufsatz, dass die Beständigkeit der Chemie als eines Faches wesentlich in ihren Laborpraktiken gründet, die ihrerseits wiederum die spezifische Art der Fragen bestimmten, die Chemiker in ihren Forschungen stellten bzw. die Form der Antworten, nach denen sie suchten. Folgende Merkmale kennzeichnen diesen “chemischen Denkstil” (1) eine spezifische, im Herstellen begründete Form des Wissens, (2) die Befassung mit einzelnen Stoffen und Materialien statt mit Materie im Allgemeinen und (3) eine Beobachtung von Natur besonders im Hinblick auf Transformationsprozesse. The Chemists' Style of Thinking. This paper discusses the relevance of the notion of “styles of scientific thinking” introduced by Alistair Crombie and revisited by Ian Hacking, for understanding how chemistry shaped its identity. Although neither Crombie nor Hacking applied this notion to individual disciplines, it seems appropriate to use it in the case of chemistry because it helps to address a puzzling issue: how did chemists manage to shape an identity of their own, despite shifting territories and theoretical transformations? Following a presentation of the notion of style, I will argue that the stable identity of chemistry is rooted in laboratory practices, which determined the specific questions that chemists put to nature as well as the answers to their questions. The “chemical style of thinking” is characterized by i) a specific way of knowing through making, ii) the concern with individual materials rather than matter in general and iii) a specific commitment to nature. 相似文献
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Vincent Charpentier Sophie Méry Eleonora Fortini et Eric Pellé 《Arabian Archaeology and Epigraphy》2009,20(1):9-17
During the Neolithic and Early Bronze Age, many teeth of large sharks ( Carcharhinus leucas ) and stingray spines were transformed into projectile points in south-eastern Arabia. These points were probably used for fishing. Deriving from dangerous and/or toxic animals, shark teeth and stingray spines were certainly markers of prestige. 相似文献
106.
From Yemen to the Arabian/Persian Gulf the coastal societies of Arabia developed an industry utilising bivalve shells (Veneridae). From the Neolithic to the Iron Age these shells were transformed into knives or scrapers, the latter sometimes having a characteristic notch. The majority of these tools are manufactured from the left valve, probably selected by right-handed people. The shell tools are very standardised and did not replace stone tools; they were probably intended for specific and complementary uses. In Arabia this industry constitutes a specific element of the material culture of the Ichthyophagi . 相似文献
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Vincent Geoghegan 《European Legacy》2004,9(5):585-595
Whilst Marx made scattered positive remarks about the details of communist society, he also made important negative indications. Religion features in this negativity: his critique of religion is withering, there is no mention of religious life in communism, and he is emphatic that religion will play no role in such a society. For Marx, one of the tangible freedoms of communism was freedom from religion. The critique of religion is fundamentally inscribed in the very genesis of Marx's thought, and Feuerbach is crucial to understanding Marx's strictures on religion. Yet Feuerbach also figures in Ernst Bloch's very positive approach to religion, which argues that communism involves the freedom to be religious, in the sense of opening up oneself and society to the gold-bearing seams of the religious experience. This essay explores how such different conceptions of the relationship between religion and communism both draw sustenance from Feuerbach. 相似文献
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The technology of shell fish-hooks and line fishing is well attested in the coastal areas of the Indian Ocean during the Neolithic period (fifth–fourth millennium BC). Their presence in the coastal area of the Arabian Gulf is now confirmed by new findings from Akab (Umm al-Qaiwain) and Shimal (Ra's al-Khaimah) in the United Arab Emirates. 相似文献
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