Thrombolysis 发表于 2025-3-25 04:54:25

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无动于衷 发表于 2025-3-25 08:10:08

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发表于 2025-3-25 12:31:06

Structural and functional characteristics of epiphyton and epipelon in relation to their distributioe limiting factor was evident from periphyton developed on artificial substrates. This periphyton differed widely in its composition from that on the natural substrates, mainly because the latter collected much more sedimenting matter..In dense . stands light was severely attenuated and the signific

Culmination 发表于 2025-3-25 19:37:43

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抚慰 发表于 2025-3-25 22:05:44

Book 1982atural balance or a ‘reasonable‘ water quality. The pollution abatement programmes are based on ecological theories; accepting waterbodies as aquatic ecosystems, the authorities concerned try to influence and lead the progresses in the systems to reach or maintain the desired ecosystem structure. Su

Instrumental 发表于 2025-3-26 03:23:56

ible the natural balance or a ‘reasonable‘ water quality. The pollution abatement programmes are based on ecological theories; accepting waterbodies as aquatic ecosystems, the authorities concerned try to influence and lead the progresses in the systems to reach or maintain the desired ecosystem structure. Su978-94-009-8017-4978-94-009-8015-0

净礼 发表于 2025-3-26 05:47:23

its high cost, it is a practically useful tool for field researchers, extension specialists, and crop consultants who do not have access to well-equipped laboratories. On-farm, adaptive research is in progress in three countries to adapt the chlorophyll meter technique for transplanted and wet-seede

努力赶上 发表于 2025-3-26 09:22:25

C. L. M. Steenbergen,H. Verdouwhone cables. Satellite communications deserve the special merit to allow connecting people at great distances by using the same (homogeneous) communication system and technology. Other very signi?cant advantages of the satellite - proach are: (i) easy fruition of both broadcast and multicast high bi

并置 发表于 2025-3-26 14:52:17

C. L. M. Steenbergenhone cables. Satellite communications deserve the special merit to allow connecting people at great distances by using the same (homogeneous) communication system and technology. Other very signi?cant advantages of the satellite - proach are: (i) easy fruition of both broadcast and multicast high bi

syring 发表于 2025-3-26 17:49:16

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查看完整版本: Titlebook: Studies on Lake Vechten and Tjeukemeer, The Netherlands; 25th anniversary of R. D. Gulati,Dr S. Parma (Director) Book 1982 Dr W. Junk Publ