scholarly journals An Interpretation of the Elovich Equation for the Rate of Chemisorption on the Basis of Surface Heterogeneity

1960 ◽  
Vol 33 (6) ◽  
pp. 734-738 ◽  
Author(s):  
Yutaka Kubokawa
Keyword(s):  
Surface Heterogeneity ◽  
Elovich Equation

Precise Droplet Manipulation Based on Surface Heterogeneity

2021 ◽  
Author(s):  
Huizeng Li ◽  
An Li ◽  
Zhipeng Zhao ◽  
Luanluan Xue ◽  
Mingzhu Li ◽  
...  
Keyword(s):  
Surface Heterogeneity ◽  
Droplet Manipulation

Improved enzymatic activity by oriented immobilization on graphene oxide with tunable surface heterogeneity

2021 ◽  
Vol 216 ◽  
pp. 108788
Author(s):  
Wenfeng Zhou ◽  
Yuan Rao ◽  
Wei Zhuang ◽  
Lei Ge ◽  
Rijia Lin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Enzymatic Activity ◽  
Surface Heterogeneity ◽  
Oriented Immobilization

Study of surface heterogeneity and nitrogen functionalizing of biochars: Molecular modeling approach

Carbon ◽  
2021 ◽  
Vol 171 ◽  
pp. 161-170
Author(s):  
Hanieh Bamdad ◽  
Sadegh Papari ◽  
Stephanie MacQuarrie ◽  
Kelly Hawboldt
Keyword(s):  
Molecular Modeling ◽  
Surface Heterogeneity ◽  
Modeling Approach

scholarly journals Coupling between Large-Scale Atmospheric Processes and Mesoscale Land–Atmosphere Interactions in the U.S. Southern Great Plains during Summer. Part II: Mean Impacts of the Mesoscale

2004 ◽  
Vol 5 (6) ◽  
pp. 1247-1258 ◽  
Author(s):  
Christopher P. Weaver
Keyword(s):  
Case Studies ◽  
Time Scales ◽  
Great Plains ◽  
Large Scale ◽  
Spatial Scales ◽  
Surface Heterogeneity ◽  
Atmospheric Modeling ◽  
Mesoscale Circulations ◽  
Southern Great Plains ◽  
Atmospheric Processes

Abstract This is Part II of a two-part study of mesoscale land–atmosphere interactions in the summertime U.S. Southern Great Plains. Part I focused on case studies drawn from monthlong (July 1995–97), high-resolution Regional Atmospheric Modeling System (RAMS) simulations carried out to investigate these interactions. These case studies were chosen to highlight key features of the lower-tropospheric mesoscale circulations that frequently arise in this region and season due to mesoscale heterogeneity in the surface fluxes. In this paper, Part II, the RAMS-simulated mesoscale dynamical processes described in the Part I case studies are examined from a domain-averaged perspective to assess their importance in the overall regional hydrometeorology. The spatial statistics of key simulated mesoscale variables—for example, vertical velocity and the vertical flux of water vapor—are quantified here. Composite averages of the mesoscale and large-scale-mean variables over different meteorological or dynamical regimes are also calculated. The main finding is that, during dry periods, or similarly, during periods characterized by large-scale-mean subsidence, the characteristic signature of surface-heterogeneity-forced mesoscale circulations, including enhanced vertical motion variability and enhanced mesoscale fluxes in the lowest few kilometers of the atmosphere, consistently emerges. Furthermore, the impact of these mesoscale circulations is nonnegligible compared to the large-scale dynamics at domain-averaged (200 km × 200 km) spatial scales and weekly to monthly time scales. These findings support the hypothesis that the land– atmosphere interactions associated with mesoscale surface heterogeneity can provide pathways whereby diurnal, mesoscale atmospheric processes can scale up to have more general impacts at larger spatial scales and over longer time scales.

MICROSCOPIC ANALYSIS OF FEATURES OF STRUCTURE DURING DRYING OF MIXTURES CONTAINING WATER, PROTEIN, OIL AND SUGAR

2018 ◽  
Author(s):  
Т.Г. КОРОТКОВА ◽  
А.С. ДАНИЛЬЧЕНКО ◽  
Д.Ю. САМОФАЛ
Keyword(s):  
Microscopic Analysis ◽  
Petri Dish ◽  
Surface Heterogeneity ◽  
Constant Weight ◽  
Sugar Water ◽  
Round Shape ◽  
Model Solutions ◽  
Spent Grains ◽  
Inert Carrier ◽  
Oil Water

Проведены исследования сухих форм модельных смесей вода–масло, вода–сахар, вода–масло–белок и вода–масло–белок–сахар под микроскопом МБС-10 при различных увеличениях с целью выявления особенностей структурообразования, степени неоднородности поверхности и оценки эффектов, наблюдаемых при сушке реальных смесей. Модельные растворы помещали в чашку Петри и по отдельности выдерживали при температуре 60°С в сушильном шкафу Memmert (Германия) до постоянного веса чашки Петри с навеской. Установлено, что в пленках присутствуют структуры, характерные для определенных компонентов растворов: частицы («ядра») практически круглой формы, выпуклые бугорки округлой формы, «звездочки», частицы с гладкими поверхностями различных размеров. Это свидетельствует о большом многообразии структурообразований высохшей пленки. Пленки растворов, включающих белок, слипались с дном чашки Петри, что приводило к определенным трудностям при их удалении. Эту особенность, связанную со сложностью отслаивания высушиваемого материала с поверхности инертного носителя, проявляющуюся при высушивании барды и приводящую к частой остановке оборудования для его очистки, необходимо учитывать при проектировании сушилок, предназначенных для сушки послеспиртовой барды. Dry forms of model solutions water–oil, water–sugar, water–oil–protein and water–oil–protein–sugar under the microscope MBS-10 at various magnifications with the purpose of revealing the features of structure formation, degree surface heterogeneity and evaluation of the effects observed when drying real mixtures are investigated. Model solutions were placed in a Petri dish and separately kept at a temperature of 60°C in a Memmert drying cabinet (Germany) to a constant weight of a Petri dish with a sample. It was found that the films contain structures typical for certain components of solutions: particles (nuclei) of almost circular shape, convex tubercles of round shape, sprockets, and particles with smooth surfaces of different sizes. This indicates a large variety of structure of the dried film. Films of solutions including protein stuck to the bottom of the Petri dish, which led to certain difficulties in their removal. This feature connected with complexity of flaking of the dried-up material from the surface of the inert carrier, which is shown when drying distillers' spent grains and leading to a frequent stop of the equipment for his cleaning needs to be considered at design of the dryers intended for distillery dregs drying.

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