標(biāo)題: Titlebook: Mathematical Concepts in Organic Chemistry; Ivan Gutman,Oskar E. Polansky Textbook 1986 Springer-Verlag Berlin Heidelberg 1986 algebra.che [打印本頁] 作者: 無法生存 時間: 2025-3-21 18:24
書目名稱Mathematical Concepts in Organic Chemistry影響因子(影響力)
書目名稱Mathematical Concepts in Organic Chemistry影響因子(影響力)學(xué)科排名
書目名稱Mathematical Concepts in Organic Chemistry網(wǎng)絡(luò)公開度
書目名稱Mathematical Concepts in Organic Chemistry網(wǎng)絡(luò)公開度學(xué)科排名
書目名稱Mathematical Concepts in Organic Chemistry被引頻次
書目名稱Mathematical Concepts in Organic Chemistry被引頻次學(xué)科排名
書目名稱Mathematical Concepts in Organic Chemistry年度引用
書目名稱Mathematical Concepts in Organic Chemistry年度引用學(xué)科排名
書目名稱Mathematical Concepts in Organic Chemistry讀者反饋
書目名稱Mathematical Concepts in Organic Chemistry讀者反饋學(xué)科排名
作者: 不容置疑 時間: 2025-3-21 23:22
Some Interrelations between Symmetry and Automorphism Groupsatoms about their mean positions are discussed in terms of . (see paragraph 8.4.3). This concept begins to break down when an internal degree of freedom (e.g. the torsion of a methyl group) becomes fully excited. As the shall show later, automorphism groups of the molecular graph are well-suited to treat the symmetry in non-rigid molecules.作者: Sinus-Rhythm 時間: 2025-3-22 02:21 作者: 歡呼 時間: 2025-3-22 05:48
Fundamentals of Graph Theoryf molecular graphs. The present chapter will, finally, provide a precise mathematical characterization of a graph. We shall list here a number of additional graph-theoretical definitions and mention a few basic properties of graphs.作者: 最初 時間: 2025-3-22 12:41
Graph Theory and Molecular Orbitalsmolecules. The wave function for a .-electron is presented in the LCAO form . where {.> symbolizes a .-vorbital located on the .-th atom of the conjugated molecule, and the summation goes over all . atoms which participate in the conjugation.作者: 財政 時間: 2025-3-22 14:37
Topological Indicesthe information contained in the molecular graph into a numerical characteristic. Every number which is uniquely determined by a graph is called a graph invariant. Those invariants of molecular graphs which are used for structure-property or structure-activity correlations are usually called topological indices (of the corresponding molecule).作者: 尾隨 時間: 2025-3-22 17:08
Topological Aspects in ChemistrySince the time of ., chemists are used to thinking about molecules as geometric objects in which atoms have a certain spatial arrangement. The geometric parameters of molecules (interatomic distances, bond angles, dihedral angles, etc.) can be measured with a rather high degree of accuracy and are indeed known in a considerable number of cases.作者: 上釉彩 時間: 2025-3-22 23:54 作者: emission 時間: 2025-3-23 03:40
Special Molecular GraphsIn graph theory a connected acyclic graph is called a tree. Hence we may say that the topology of acyclic molecules is represented by trees; the essential topological properties of acyclic molecules coincide with those of trees. In the following we shall get acquainted with the basic properties of trees.作者: Arresting 時間: 2025-3-23 06:55
Fundamentals of Group TheoryGroups are sets of elements amended with a combination law that satisfies certain conditions (axioms).作者: 開玩笑 時間: 2025-3-23 11:47
Symmetry GroupsIn 3-dimensional space only the few following types of symmetry operations are feasible in order to transform a symmetrical molecule into itself:作者: 考古學(xué) 時間: 2025-3-23 17:20
Thermodynamic Stability of Conjugated MoleculesWe already know that the molecular orbital energy levels of the .-electrons in conjugated molecules are (within the HMO approximation) related to the eigenvalues of the molecular graph via ..作者: 痛苦一下 時間: 2025-3-23 21:41 作者: invulnerable 時間: 2025-3-24 00:41 作者: 里程碑 時間: 2025-3-24 06:08
http://image.papertrans.cn/m/image/626048.jpg作者: 向外 時間: 2025-3-24 06:49 作者: forebear 時間: 2025-3-24 12:33
978-3-642-70984-5Springer-Verlag Berlin Heidelberg 1986作者: medieval 時間: 2025-3-24 16:24 作者: 正論 時間: 2025-3-24 20:33
Molecular Topologytions, however, the present simple description will fully suffice. Suppose a molecule . is composed of . atoms ., ... , .. Suppose also that for any two atoms . and . we can decide which of the following two statements is correct:作者: pancreas 時間: 2025-3-25 00:51 作者: BOGUS 時間: 2025-3-25 07:07 作者: 刀鋒 時間: 2025-3-25 08:53 作者: 悲痛 時間: 2025-3-25 11:57 作者: 文字 時間: 2025-3-25 15:54 作者: 鋼盔 時間: 2025-3-25 21:29
Topological Effect on Molecular Orbitalsic nuclei and electrons. Abstracting the molecular structure as far as possible one arrives at molecular topology. In the course of abstraction one and the same molecular topology may be obtained from very different molecules (see Fig. 2.1). Thus the pronounced differences in the chemical properties作者: 小爭吵 時間: 2025-3-26 03:10
of environmental stimulation of the brain through specific and nonspecific pathways. We have noted that all perception, information processing, as well as motor and autonomic activity is based on the specific pathways for information. It has also been shown how a decrease in arousal or activation ha作者: Amplify 時間: 2025-3-26 06:45
Ivan Gutman,Oskar E. Polanskyntly many of these disorders have been shown to have significant overlap and many children that have one disorder will often be diagnosed with at least one other. Neurobiological research and functional imaging tests have given science a new way of examining the brain in its functional and dysfuncti作者: 是限制 時間: 2025-3-26 08:30
ly thought that the elimination of redundant embryonic neurons serves the purpose of matching the number of neurons of a particular structure with the size of the target to be innervated, as suggested by transplantation and ablation experiments (for review, see Cunningham 1982). The current view is 作者: 異端邪說2 時間: 2025-3-26 14:57
Ivan Gutman,Oskar E. Polanskyiscusses new avenues for the research of aggression and abnoMechanisms controlling aggressive behavior started to be identified from late 20‘s of the 20th century and subsequent research described such mechanisms in great detail. While the findings are of great relevance for the understanding of agg作者: VOK 時間: 2025-3-26 20:26 作者: canonical 時間: 2025-3-27 00:27 作者: 肌肉 時間: 2025-3-27 02:53 作者: etiquette 時間: 2025-3-27 08:45
Ivan Gutman,Oskar E. Polansky that autistic children often exhibit an uneven pattern of cognitive abilities suggestive of left hemisphere dysfunction. When the autistic child shows peak skills, they are usually in areas of functioning traditionally associated with the right hemisphere, such as visuospatial abilities and pattern作者: gimmick 時間: 2025-3-27 12:04 作者: Mobile 時間: 2025-3-27 14:15
Ivan Gutman,Oskar E. Polanskyological research on autism and related developmental disabilities. However, until now there has not been sufficient information to justify aseparate volume on this most important topic. Recent advances both in our under- standing of the brain and in the technology to facilitate the measurement of n作者: GRATE 時間: 2025-3-27 20:23 作者: 專心 時間: 2025-3-28 01:29 作者: cochlea 時間: 2025-3-28 05:20 作者: 審問 時間: 2025-3-28 07:20
Ivan Gutman,Oskar E. Polanskystitute of Medicine estimated that 100 million American adults are affected by chronic pain of any type and that associated costs (including lost productivity) are as high as $635 billion [1]. Pain is also an expected outcome of surgery. In 2010, 51.4 million inpatient surgical procedures were perfo作者: Chagrin 時間: 2025-3-28 11:50
Ivan Gutman,Oskar E. Polanskystitute of Medicine estimated that 100 million American adults are affected by chronic pain of any type and that associated costs (including lost productivity) are as high as $635 billion [1]. Pain is also an expected outcome of surgery. In 2010, 51.4 million inpatient surgical procedures were perfo作者: Pruritus 時間: 2025-3-28 16:34 作者: Pastry 時間: 2025-3-28 20:42 作者: conformity 時間: 2025-3-29 02:22 作者: 漂亮 時間: 2025-3-29 04:20
Ivan Gutman,Oskar E. Polanskyof numerous phenomena studied extensively by experimental psychologists and other behaviour scientists. The central issue concerns the . and the . by means of which nervous systems transact their versatile performances, and the explanatory range and power of any candidate coding system. In this mono作者: aerial 時間: 2025-3-29 07:35 作者: 棲息地 時間: 2025-3-29 11:57 作者: 歡騰 時間: 2025-3-29 19:15
The greatest concentrations of these receptors are found in the upper cervical spine. It appears that these receptors primarily transducer gravitational forces, which is the most frequent and only constant environmental stimulus available. Gravity, which provides the force that postural muscles are作者: NICE 時間: 2025-3-29 20:34
Ivan Gutman,Oskar E. Polanskypmental disorders, autism, OCD, TS, and the .. From an anatomical and functional perspective, we find that many of the same areas of the brain are affected. Some regions are smaller or appear atrophied, other regions appear to be functionally hyperactive, and some are hypoactive.作者: STEER 時間: 2025-3-30 01:39
rowth factor (NGF) that has all the characteristics of a target-derived trophic molecule required by embryonic neurons at a critical stage of their development, when the axons of these neurons reach their target (for review see Levi-Montalcini and Angeletti 1968, Thoenen and Barde 1980).作者: minion 時間: 2025-3-30 07:50
Ivan Gutman,Oskar E. Polansky processes that affect aggressiveness as well as the neuronal circuits involved in execution of aggressive acts. The integration of the two levels of aggression control as well as functional alterations of the system is investigated with respect to the emergence of abnormal forms of aggression.作者: Musculoskeletal 時間: 2025-3-30 10:46 作者: Minikin 時間: 2025-3-30 12:58
Ivan Gutman,Oskar E. Polanskyervous system—such as autism, mental retardation, or motor disabilities—to deficiencies in specific neurotransmitter systems. An exception to this general thesis is a report by Lloyd . (1981), who examined the neurotransmitter deficiencies found in Lesch-Nyhan disease—a developmental syndrome associ作者: Ethics 時間: 2025-3-30 19:47 作者: machination 時間: 2025-3-30 20:56
Ivan Gutman,Oskar E. Polanskymisphere development in the syndrome of autism. Indeed, there now exist numerous studies of many aspects of brain functioning in autistic children. It is clear from these studies that, while left hemisphere dysfunction may play a role in autistic symptomology, it is only one piece in a complex and n
