查询词典 Homo

The results show that for collectors of the same kind, their selectivity is in linear relationship with HOMO energy and can be predicted well. For collectors of different kinds, it can be concluded from shape of HOMO and atomic HOMO density that the selectivity of ethoxycarbonyl thionocarbamates is better than the one of xanthogen formates.

结果表明：对于同种类型的捕收剂，其选择性与HOMO能量呈线性关系，依据HOMO能量能较准确地预测这两种捕收剂的选择性能；对于不同种类的捕收剂，通过对HOMO形状以及组成原子的HOMO密度的讨论可知，乙氧羰基硫氨酯类捕收剂的选择性能要比黄原酸甲酸酯类捕收剂的强。

Part 4: Synthesis of (5α)-3-Hydroxy-18-Nor-C-Homo-13a-Azaandrostanes 1-Azabicyclo [5, 3, 0] decane (6) is a core skeleton of stemonine (7) and its derivatives, which are a group of bio-active natural products.

四、（5α）-3-羟基-18-nor-C-homo-13a-氮杂雄甾烷的合成 1-氮杂双环[5.3.0]癸烷(6)是天然产物百部生物碱(7)类分子的骨架结构，许多该类化合物都具有重要的生物活性。

The results show that the influences of the central atoms on electron cloud, electrostatic potential, total density of states are not clear. But the central atom can affect the components of the frontier orbitals HOMO and LUMO.

结果表明，中心原子对Keggin结构杂多阴离子的电子云、静电势、总态密度的分布影响不明显；但中心原子不同，前线轨道HOMO， LUMO的组成有一定差异。

The first human ancestor to be out of Africa is Homo erectus.

Homo erectus 是第一个走出非洲的人类祖先。

Because of the nondirectional property of ionic bond and the fully delocalized property of pi electrons on carbon layers, translation will not change the electronic structure of carbon layers, resulting in that A-GIC and AE-GIC hare quite good lubrication as well. The electrons come from metals mainly transfer to the delocalized pi orbitals of carbon layers, and the increase of delocalized electrons will make metal graphite intercalation compound more electro-conductive than graphite itself. Because ionic bond between metals and carbon layers is weaker and its lattice energy is much less than that of typical NaCl crystal, so metals could be left from interlayers. The Mulliken populations of C-C in intercalation compounds are smaller than that of graphite, and the HOMO energy level of GIC is higher than that of graphite too. These Lead to that GIC will easier be oxidized.

由于离子键没有方向性，又由于碳层中的π电子是充分离域的，所以碳层不会由于平移而改变其电子结构，金属石墨层间化合物仍具有很好的润滑性；金属失去的电子主要转移到碳层的离域π轨道中，碳层离域电子增多使金属石墨层间化合物的导电性比石墨增强；金属与碳层间的离子键强度比较弱，其晶格能远小于典型的离子晶体，因而金属易从石墨层中脱出；金属石墨层间化合物中的C-C间Mulliken布居值小于石墨中C-C间的值，且金属石墨层间化合物的HOMO能级也高于石墨的HOMO能级，所以石墨层间化合物中的碳原子较石墨更易被氧化。

It is shown that the first hyperpolarizability β of barbituric acid deviratives strongly depends on the donor structure and the length of conjugate chain, but is not sensitive to the acceptor structure. The HOMO-LUMO calculations reveal that the first hyperpolarizabilities of barbituric acid deviratives are linear to the HOMO-LUMO energy gap △E.

研究结果表明，给体结构与共轭链长度对第一超极化率β影响较大，而受体结构对分子第一超极化率的影响很小，并且分子第一超极化率与分子前线轨道HOMO与LUMO的能级差△E呈较好的线性关系。

Next HOMO or HOMO-1 for the radical cations calculated by the ab initio 3-21+G^* method, and the atom-pair interaction energy determined by NMDO calculation, it is shown that when n is equal to or largey than 3 in the bridge chain (CH2)n for bicyclo diamine radical cations, the bridgehead nitrogen atoms form a weak N, N'-three-electron σ-bond through space.

通过比较这些阳离子几何构型，HOMO和NHOMO(即NextHOMO和HOMO-1)，和由MNDO计算确定的原子对作用能，表明当二氮双环游离基阳离子的桥链(CH2)n的n≥3时，桥头氮原子通过空间相互用用形成了一个弱的N，N'-三电子σ键。

The results showed that the LUMO values are -3.19eV for organic oxadiazole,-3.16eV for macromolecular oxadiazole and -3.21eV for Poly(1,3,4-oxadiazole) and their HOMO values are all under -6.0eV, hinting that they show good hole-blocking characteristics.

利用循环伏安法测定了三种不同类型衍生物的带隙和HOMO、LUMO能级，噁二唑类小分子、大分子、聚合物衍生物的LUMO能级分别为-3.19eV、-3.16eV、-3.21eV，有利于电子的注入，三种噁二唑衍生物的HOMO能级都在-6.0eV以下，对空穴也有很好的阻挡作用。

Properties of frontier orbital of xanthogen formates and ethoxycarbonyl thionocarbamates, including HOMO energy, shape of HOMO and atomic HOMO density, were calculated with quantum chemistry programs GW03 and FUJISTU CAChe. According to the results, the relationship between selectivity of such two kinds of collectors and their quantum chemical indices was investigated to discuss the feasibility of applying them in screening chalcopyrite collectors.

摘 要：利用量子化学软件GW03和FUJISTU CAChe计算黄原酸甲酸酯类、乙氧羰基硫氨酯类黄铜矿捕收剂的前线轨道的性质—HOMO能量、HOMO形状以及药剂组成原子的HOMO密度，并结合这两类药剂的浮选结果研究这些量化参数与药剂选择性之间的联系，探讨这些参数作为选择黄铜矿捕收剂判据的可行性。

In view of their potential applications as electronic materials, the electronic structures of a series of PAMs are also investigated. The LUMO-HOMO gaps and the HOMO spatial distributions of the planar PAMs show obvious odd-even difference behavior.

电子结构分析表明，平面构型大环分子的LUMO-HOMO能隙和分子轨道空间分布具有明显的奇偶差异特性。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。