A Flow Adsorption Microcalorimetry-Logistic Modeling Approach for Assessing Heterogeneity of Brønsted-Type Surfaces: Application to Pyrogenic Organic Materials

2018 ◽  
Vol 52 (11) ◽  
pp. 6167-6176 ◽  
Author(s):  
Omar R. Harvey ◽  
Burke C. Leonce ◽  
Bruce E. Herbert
Keyword(s):  
Organic Materials ◽  
Adsorption Microcalorimetry ◽  
Modeling Approach ◽  
Logistic Modeling

Prevalence and Predictors of Household Food Insecurity Among iCook 4-H Participants at Baseline: A Multivariable Binomial Logistic Modeling Approach

2017 ◽  
Vol 117 (10) ◽  
pp. A141
Author(s):  
M. McElrone ◽  
S. Colby ◽  
A. White ◽  
L. Franzen-Castle ◽  
M. Olfert ◽  
...  
Keyword(s):  
Food Insecurity ◽  
Household Food Insecurity ◽  
Modeling Approach ◽  
Logistic Modeling ◽  
Household Food

scholarly journals Prevalence and Predictors of Pre-Diabetes and Diabetes among Adults 18 Years or Older in Florida: A Multinomial Logistic Modeling Approach

PLoS ONE ◽  
2015 ◽  
Vol 10 (12) ◽  
pp. e0145781 ◽  
Author(s):  
Ifechukwude Obiamaka Okwechime ◽  
Shamarial Roberson ◽  
Agricola Odoi
Keyword(s):  
Modeling Approach ◽  
Logistic Modeling

Factors associated with consecutive and non-consecutive crashes on freeways: A two-level logistic modeling approach

2021 ◽  
Vol 154 ◽  
pp. 106054
Author(s):  
Zhou Zichu ◽  
Meng Fanyu ◽  
Song Cancan ◽  
Tay Richard ◽  
Guo Zhongyin ◽  
...  
Keyword(s):  
Factors Associated ◽  
Modeling Approach ◽  
Logistic Modeling

Application of Improved Voltage Compensation in the SEM to Imaging of Organic Materials

1973 ◽  
Vol 31 ◽  
pp. 444-445
Author(s):  
P.J. Killingworth ◽  
M. Warren
Keyword(s):  
Electron Beam ◽  
Organic Materials ◽  
Operating Parameters ◽  
Low Density ◽  
Beam Diameter ◽  
Incident Electron Beam ◽  
Specimen Material ◽  
Voltage Compensation ◽  
Selection Of ◽  
Scanning Electron

Ultimate resolution in the scanning electron microscope is determined not only by the diameter of the incident electron beam, but by interaction of that beam with the specimen material. Generally, while minimum beam diameter diminishes with increasing voltage, due to the reduced effect of aberration component and magnetic interference, the excited volume within the sample increases with electron energy. Thus, for any given material and imaging signal, there is an optimum volt age to achieve best resolution.In the case of organic materials, which are in general of low density and electric ally non-conducting; and may in addition be susceptible to radiation and heat damage, the selection of correct operating parameters is extremely critical and is achiev ed by interative adjustment.

200kv superconducting cryo electron microscope

1987 ◽  
Vol 45 ◽  
pp. 642-643
Author(s):  
M. Iwatsuki ◽  
Y. Kokubo ◽  
Y. Harada ◽  
J. Lehman
Keyword(s):  
Electron Microscope ◽  
Structure Analysis ◽  
Organic Materials ◽  
Strong Interactions ◽  
Specimen Preparation ◽  
Great Effort ◽  
Electron Microscopic ◽  
Crystal Fields ◽  
Special Skill ◽  
Long Time

In recent years, the electron microscope has been significantly improved in resolution and we can obtain routinely atomic-level high resolution images without any special skill. With this improvement, the structure analysis of organic materials has become one of the interesting targets in the biological and polymer crystal fields.Up to now, X-ray structure analysis has been mainly used for such materials. With this method, however, great effort and a long time are required for specimen preparation because of the need for larger crystals. This method can analyze average crystal structure but is insufficient for interpreting it on the atomic or molecular level. The electron microscopic method for organic materials has not only the advantage of specimen preparation but also the capability of providing various information from extremely small specimen regions, using strong interactions between electrons and the substance. On the other hand, however, this strong interaction has a big disadvantage in high radiation damage.

STM of freeze-fracture replicas: Problems and promises

1993 ◽  
Vol 51 ◽  
pp. 68-69
Author(s):  
J. T. Woodward ◽  
J. A. N. Zasadzinski
Keyword(s):  
Scanning Tunneling Microscope ◽  
Organic Materials ◽  
Freeze Fracture ◽  
Atomic Resolution ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Molecular Scale ◽  
Organic Surfaces ◽  
Metal Layers ◽  
Conductive Surfaces

The Scanning Tunneling Microscope (STM) offers exciting new ways of imaging surfaces of biological or organic materials with resolution to the sub-molecular scale. Rigid, conductive surfaces can readily be imaged with the STM with atomic resolution. Unfortunately, organic surfaces are neither sufficiently conductive or rigid enough to be examined directly with the STM. At present, nonconductive surfaces can be examined in two ways: 1) Using the AFM, which measures the deflection of a weak spring as it is dragged across the surface, or 2) coating or replicating non-conductive surfaces with metal layers so as to make them conductive, then imaging with the STM. However, we have found that the conventional freeze-fracture technique, while extremely useful for imaging bulk organic materials with STM, must be modified considerably for optimal use in the STM.

Stabilizing pyritic material

1989 ◽  
Vol 4 ◽  
pp. 244-248 ◽  
Author(s):  
Donald L. Wolberg
Keyword(s):  
Significant Contribution ◽  
Organic Materials ◽  
Sedimentary Rocks ◽  
Iron Sulfides ◽  
Decomposition Products ◽  
Iron Minerals ◽  
Pyrite Formation ◽  
Organic Sediments ◽  
Freshwater Environments

The minerals pyrite and marcasite (broadly termed pyritic minerals) are iron sulfides that are common if not ubiquitous in sedimentary rocks, especially in association with organic materials (Berner, 1970). In most marine sedimentary associations, pyrite and marcasite are associated with organic sediments rich in dissolved sulfate and iron minerals. Because of the rapid consumption of sulfate in freshwater environments, however, pyrite formation is more restricted in nonmarine sediments (Berner, 1983). The origin of the sulfur in nonmarine environments must lie within pre-existing rocks or volcanic detritus; a relatively small, but significant contribution may derive from plant and animal decomposition products.

455: Long Term Survival in Men with Clinically Localized Prostate Cancer: Propensity Score Modeling Approach to Evaluate Impact of Treatment

2004 ◽  
Vol 171 (4S) ◽  
pp. 121-121
Author(s):  
Ashutosh Tewari ◽  
Mazen Hasan ◽  
George Devine ◽  
Mani Menon
Keyword(s):  
Prostate Cancer ◽  
Propensity Score ◽  
Localized Prostate Cancer ◽  
Term Survival ◽  
Long Term Survival ◽  
Modeling Approach
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