GC/MS法追踪摇头丸杂质体系

本文运用GS/MS的总离子流法,选择离子法,对南京地区常见的几种摇头丸进行全面分析,找出与合成途径相关的痕量杂质,根据杂质情况初步确定其合成途径.     

鲁克沁构造带稠油成藏机制研究

吐哈盆地台南凹陷鲁克沁构造带中的北西走向断层受挤压强烈 ,封闭性好 ;而北东走向断层封闭性差 ,常成为油气运移的良好通道。由于本区断块圈闭的有效性差 ,故不具备大规模聚集稀油的条件 ,但对稠变到一定程度的稠油能起较好的封堵作用。鲁克沁构造带高粘重质油的形成是原油运移和成藏阶段双重稠变作用的结果 ,并且油气的聚集是一个动态的过程。随着原油的逐渐稠变 ,所需要的封堵条件逐渐降低 ,油气的聚集过程才趋于稳定。鲁克沁构造带构造后期变革主要表现在构造幅度的增大 ,而未发生强烈的断裂作用 ,因此 ,前侏罗系油藏得以完好地保存     

Intertidal habitat: does the shore level affect the nutritional condition of the shanny (Lipophrys pholis,Teleostei, Blenniidae)?

The nutritional condition of the shanny (Lipophrys pholis, Teleostei, Blenniidae), an intertidal fish, is affected by the shore level on whihc it dwells. Depending on the altitude within the intertidal, zone access to food is restricted for a certain time. A progressive decrease in the feeding time for an individual remaining on an increasingly higher shore level leads to a poorer nutritional condition compared to an individual staying at a lower shore level. Trade-off mechanisms between the feeding time and competition for space and/or predation pressure seem to be responsible for the still high abundance ofL. pholis on the upper shore. Possible consequences for growth and reproduction as well as distribution patterns are discussed.     

Charge order and three-site distortions in the Verwey structure of magnetite

The mineral magnetite (Fe(3)O(4)) undergoes a complex structural distortion and becomes electrically insulating at temperatures less than 125 kelvin. Verwey proposed in 1939 that this transition is driven by a charge ordering of Fe(2+) and Fe(3+) ions, but the ground state of the low-temperature phase has remained contentious because twinning of crystal domains hampers diffraction studies of the structure. Recent powder diffraction refinements and resonant X-ray studies have led to proposals of a variety of charge-ordered and bond-dimerized ground-state models. Here we report the full low-temperature superstructure of magnetite, determined by high-energy X-ray diffraction from an almost single-domain, 40-micrometre grain, and identify the emergent order. The acentric structure is described by a superposition of 168 atomic displacement waves (frozen phonon modes), all with amplitudes of less than 0.24 ?ngstr?ms. Distortions of the FeO(6) octahedra show that Verwey's hypothesis is correct to a first approximation and that the charge and Fe(2+) orbital order are consistent with a recent prediction. However, anomalous shortening of some Fe-Fe distances suggests that the localized electrons are distributed over linear three-Fe-site units, which we call 'trimerons'. The charge order and three-site distortions induce substantial off-centre atomic displacements and couple the resulting large electrical polarization to the magnetization. Trimerons may be important quasiparticles in magnetite above the Verwey transition and in other transition metal oxides.     

Amphibious vision in Coryphoblennius galerita L. (Perciformes).

The morphology of the ophthalmic cornea in the blenniid fish Coryphoblennius galerita (Teleostei) shows adaptation to the amphibious life. Amphibious vision is provided by a flattened area within the cornea. Eyes of other, non-amphibious blenniids are compared with those of C. galerita.     

Reactive depolarization of muscle fibre membrane with slowly increasing middle-frequency current flow

Zusammenfassung Die Mittelfrequenz-Querreizung (5 kHz) wird am Sartorius des Frosches mittels intrazellulärer Ableitung am Reizort untersucht, wobei die Wechselstromamplitude linear langsam Über Minuten zunimmt. Die als reaktiv zu bezeichnende Depolarisierung ist ihrem Wesen nach ein eigenständiger Vorgang. Der hervorstechendste Unterschied gegenÜber der physikalisch aufgezwungenen Gleichstromdepolarisierung ist, dass keine Akkommodation nachweisbar ist.

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Presented at the First Meeting of the Union of the Swiss Societies for Experimental Biology, Berne, 17 May, 1969.     

求取剩余油饱和度的一种实用方法

分析了水驱油田地质、测井及开发动态特征，提出了用生产井含水率资料结合测井资料求取产层平均剩余油饱和度的方法。阐述了该方法的基本模型和计算过程，并以实例计算说明了这种方法的实际应用效果。结果表明，该方法操作简便、实用性强、计算结果可靠，且能准确反映储层的剩余油分布特征。这种方法也避免了水淹层混合液电阻率、岩电系数和水淹层电阻率求取值失真的影响。     

Amphibious vision inCoryphoblennius galerita L. (Perciformes)

The morphology of the ophthalmic cornea in the blenniid fishCoryphoblennius galerita (Teleostei) shows adaptation to the amphibious life. Amphibious vision is provided by a flattened area within the cornea. Eyes of other, non-amphibious blenniids are compared with those ofC. galerita.