Three modes of approach of CHCl to the oxygen of the nucleophile were examined: and to the lone pair on the nitrogen in the molecular plane, and an approach along the π system of the oximate anion. The AM1 method differed markedly from the two methods, both in the reactivity order of...
a molecular orbital theory of reactivity in aromatic hydrocarbons a molecular orbital theory of reactivity in aromatic hydrocarbons In the search for a quantitative correlation between reactivity and electronic configuration of aromatic hydrocarbons, the electron density, at each carbon atom, of the highest...
3.Reactivity is similar to that of oxygen at room temperature. NF3 is relatively inert at ambient temperature and pressure conditions and exhibits little, if any, reactivity.反应活性与室温下的氧相似。在常温常压下NF3是相对不活泼的,显示出很低的反应活性。 4.a system considered analogous in structure...
Cerebral blood flow, cerebral metabolic rate of oxygen and relative CO2-reactivity during craniotomy for supratentorial cerebral tumours in halothane anaes... Fourteen patients were studied during craniotomy for small supratentorial cerebral tumours. Cerebral blood flow (CBF) and cerebral metabolic rate ...
Moreover, the oxygen concentration was assumed constant at each temperature and therefore, not explicitly integrated into the model. Thus, a pseudo-first-order kinetic was assumed for vitamin C degradation. Folate degradation was modelled using the same first-order kinetics equation (Eq. 1), as ...
oxygen compoundsreaction kinetics/ relative humiditypyrrole detectionPTR-MShydroxyl radicalatmospheric oxidantSensitivity dependence of PTR-MS for pyrrole detection in dry and humid air is reported for the new application of OH reactivity measurements in ambient air....
Velocities of hepatic Akr1d1 and Hsd11b1 were quantified in tissue homogenates as reported previously (Livingstone et al. 2009). Plasma corticosterone was measured by an in-house RIA, without significant cross-reactivity with dexamethasone (Holmes et al. 1995), and ACTH by RIA (MP Biomedical,...
the reactivity towards SO2uptake was highest on δ-MnO2but lowest on β-MnO2, with a geometric uptake coefficient (γobs) of (2.42 ± 0.13) ×10–2and a corrected uptake coefficient (γc) of (1.48 ± 0.21) ×10−6for the former while γobsof (3.35 ± 0.43) ×10...
In order to approach the factors controlling corrosion mechanisms of ZnMgAl in natural environments we have undertaken a series of studies in which the corrosion rates, mass balance, intrinsic reactivity, selective dissolution and corrosion products in different environments and exposure conditions were st...
This is the first book for over twenty years on the physical, biological, chemical and geological characteristics of a large-scale estuary. Interdisciplina... MI Elsabh,N Silverberg - 《Quarterly Review of Biology》 被引量: 71发表: 1990年 Reactivity and transport of nutrients and metals in th...