恰当 发表于 2025-3-21 17:24:33
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http://reply.papertrans.cn/99/9825/982402/982402_2.pngaccrete 发表于 2025-3-22 03:15:55
Hartmut Oetker,Felix Maultzschhese appear in the yolk sac of the developing embryo and migrate by ameboid movement to genital ridges located near the Wolffian ducts (Zamboni, 1972b; Baker, 1972). There they multiply to form oogonia, which degenerate in the medulla of the developing gonad, but they continue to multiply in the outVulnerable 发表于 2025-3-22 07:45:39
Hartmut Oetker,Felix Maultzschant egg, setting the zygote on the pathway to cleavage, organogenesis, and formation of an adult. Fertilization has been studied extensively for over 100 years because of curiosity about the mechanism that gives rise to a new generation. More recently, research on fertilization has become important背书 发表于 2025-3-22 09:22:15
Hartmut Oetker,Felix Maultzschke place in complete darkness. Man sees light for the first time at birth. With the technique of in vitro fertilization we deviate from these physiological conditions. The gametes are exposed to light, at the time of ovum pick up when the bright light of the endoscopist is shed on the follicle, at t盖他为秘密 发表于 2025-3-22 15:42:54
Hartmut Oetker,Felix Maultzschzers, for direct use as fertilizer, or for use as a raw material for nonfertilizer products. Some idea of the magnitude of ocean transport of ammonia can be gained by a recent ISMA report that lists 153 maritime ammonia terminals throughout the world including 18 that were under construction when thExhilarate 发表于 2025-3-22 20:14:50
Hartmut Oetker,Felix Maultzschcal countries of Asia, Africa, and Latin America call attention to those aspects of fertilization that have been neglected but are expected to yield large economic payoffs in the future. Fertilizer sulfur falls into this category. In the past fertilizer sulfur received little attention from researc裂隙 发表于 2025-3-22 21:13:40
Hartmut Oetker,Felix Maultzschmany tropical countries ofAsia, Africa, and Latin America call attention to those aspects of fertilization that have been neglected but are expected to yield large economic payoffs in the future. Fertilizer sulfur falls into this category. In the past fertilizer sulfur received little attention froMalcontent 发表于 2025-3-23 02:02:05
Hartmut Oetker,Felix Maultzschnures and sewage sludges (biosolids) are the main organic fertilizers and the latter also may contain heavy-metal contaminants. Heavy metals in biosolids may be found in the inorganic form or may be organically complexed, which could affect their chemical reactions in soil. These heavy metals may ac辞职 发表于 2025-3-23 06:45:55
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