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利用低频拉曼光谱识别Ni(II)-中四苯基卟啉的非平面形变
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作者 王申浩 muhammad muhammad 黄青 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2023年第1期57-65,I0002,共10页
金属卟啉蛋白中卟啉环的非平面形变具有重要的功能相关性.本文采用密度泛函理论、简正坐标结构分解法和拉曼光谱研究了Ni(II)-中四苯基卟啉在不同配位数下的非平面形变与低频拉曼光谱之间的关系.结果表明,四配位的四苯基卟啉晶体存在两... 金属卟啉蛋白中卟啉环的非平面形变具有重要的功能相关性.本文采用密度泛函理论、简正坐标结构分解法和拉曼光谱研究了Ni(II)-中四苯基卟啉在不同配位数下的非平面形变与低频拉曼光谱之间的关系.结果表明,四配位的四苯基卟啉晶体存在两种主要的非平面形变:折皱形和鞍形.通过密度泛函理论计算,四苯基卟啉的折皱形和鞍形形变大小分别为1.473Å和0.493Å.利用低频拉曼特征峰(γ12,γ13)和(γ16,γ17)可分别识别出折皱形和鞍形形变.当四配位的四苯基卟啉转化为六配位的双(吡咯烷)时,卟啉环的非平面形变几乎消失,通过采用密度泛函理论计算估计鞍形的非平面变形仅为0.213A左右.实验.上可以利用低频拉曼光谱的特征峰来识别超过0.25 A的鞍形形变. 展开更多
关键词 卟啉 非平面形变 拉曼光谱 简正坐标结构分解 密度泛函理论 配体
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Efficacy of Mycorrhizae Based Manure on the Vegetative Growth of Rice Grown within Bauchi State, Nigeria
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作者 muhammad Auwal Ladan Fatima Aliyu Deba muhammad muhammad 《American Journal of Plant Sciences》 CAS 2023年第4期464-471,共8页
Background: Rice is one of the staple crops in the African continent for its ability to give maximum yields which can help to achieve food security under the sustainable development goals (SDGs);to those effects, the ... Background: Rice is one of the staple crops in the African continent for its ability to give maximum yields which can help to achieve food security under the sustainable development goals (SDGs);to those effects, the incessant use of inorganic fertilizer has been employed which proved to have devastating effect in the environment and the ecosystem at large. Therefore, the thirst for an alternative method to ensure bumper production of rice cannot be overemphasized so as to prevent soil alteration and environmental damage. Objective: This study aimed at determining the efficacy of mycorrhizae-based manure on the vegetative growth of rice as compared to inorganic fertilizer and its sustainability. Methods: Soil samples were collected from seven (7) locations (M1 - M7). Mycorrhiza were isolated from the soils and mass produced, mixed with organic waste to form manure (biofertilizer) and were applied at concentrations of 50 g, 100 g and 150 g to the potted rice in tree (3) replicates. Growth parameters observed were plant height, girth diameter, leaf broadness and leaf number. Results: The result revealed mycorrhizal spore count ranging from 1.7 × 10<sup>7</sup> - to 4.1 × 10<sup>7</sup> across the locations. The mycorrhizae-based manure gives the highest plant height of 45.33 cm as compared with the least plant height of 18.5 cm from the inorganic fertilizer. Furthermore, the biofertilizer gives a positive influence on the other parameters observed in comparison with the inorganic fertilizer. Statistical analysis shows that, the means of all the parameters except for leaf numbers were significantly different at p ≤ 0.05 across the sampling locations. Conclusions: Mycorrhizae-based manure proves to be an effective replacement of inorganic fertilizer that can boost rice production at a cheaper cost. 展开更多
关键词 BIOFERTILIZER MYCORRHIZAE RICE Agriculture RHIZOSPHERE
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