夜晚 发表于 2025-3-30 11:19:01

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爱得痛了 发表于 2025-3-30 16:06:09

Erwerbsarbeit und Beschäftigung im Umbruch of the present developments. The main reason for this is that the earlier work has recently been discussed in some detail (. 1952a). The same considerations have resulted in the chemistry of the pigments discussed here being kept down to a minimum. Volume V of this series contains a chapter mainly

debouch 发表于 2025-3-30 17:26:55

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只有 发表于 2025-3-30 21:54:00

Aktueller Forschungsstand und Status Quo,ances, comparatively hard at low temperatures, soft and kneadable at higher temperatures, usually melting between 40 and 100° C, insoluble in water, soluble in lipid solvents and with a high resistance against chemical attack. Usually, their surfaces, if rubbed, assume a glossy appearance.

有机体 发表于 2025-3-31 01:55:02

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填料 发表于 2025-3-31 08:20:24

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MENT 发表于 2025-3-31 11:01:46

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草率女 发表于 2025-3-31 14:03:27

https://doi.org/10.1007/978-3-658-23279-5. Eine Kennzeichnung dieser Stoffe nach rein chemischen oder botanischen Gesichtspunkten hat sich als nicht möglich erwiesen, da vielen Verbindungen gerberische Fähigkeiten zu eigen sind, ohne daß eine enge konstitutionelle Verwandtschaft oder ein biogenetischer Zusammenhang erkennbar ist. So gilt d

熔岩 发表于 2025-3-31 19:28:17

https://doi.org/10.1007/978-3-658-23279-5 and it is perennial; in addition, it has a persistent stem that continues to live and increase in thickness for a number of years. Such plants are of three types—lianas, shrubs and trees; but only trees are the source of commercial wood.

Anhydrous 发表于 2025-3-31 23:10:35

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查看完整版本: Titlebook: Der Stoffwechsel Sekundärer Pflanzenstoffe / The Metabolism of Secondary Plant Products; Barbarín Arreguín Lozano,Clinton E. Ballou,George