New Tools and Methods in Agronomy

2016 ◽  
pp. 503-514
Author(s):  
Pablo J. Zarco-Tejada ◽  
Luciano Mateos ◽  
Elias Fereres ◽  
Francisco J. Villalobos
Keyword(s):  
Tools And Methods

A procedure for cross-sectioning materials for TEM analysis without ion milling

1990 ◽  
Vol 48 (4) ◽  
pp. 742-743
Author(s):  
J.P. Benedict ◽  
Ron Anderson ◽  
S. J. Klepeis
Keyword(s):  
Surface Topography ◽  
Milling Time ◽  
Specimen Preparation ◽  
Ion Milling ◽  
Cleaning Operation ◽  
Tem Analysis ◽  
Platinum Silicide ◽  
Surface Alteration ◽  
Polishing Damage ◽  
Tools And Methods

Traditional specimen preparation procedures for non-biological samples, especially cross section preparation procedures, involves subjecting the specimen to ion milling for times ranging from minutes to tens of hours. Long ion milling time produces surface alteration, atomic number and rough-surface topography artifacts, and high temperatures. The introduction of new tools and methods in this laboratory improved our ability to mechanically thin specimens to a point where ion milling time was reduced to one to ten minutes. Very short ion milling times meant that ion milling was more of a cleaning operation than a thinning operation. The preferential thinning and the surface topography that still existed in briefly ion milled samples made the study of interfaces between materials such as platinum silicide and silicon difficult. These two problems can be eliminated by completely eliminating the ion milling step and mechanically polishing the sample to TEM transparency with the procedure outlined in this communication. Previous successful efforts leading to mechanically thinned specimens have shown that problems center on tool tilt control, removal of polishing damage, and specimen cleanliness.

Assessing Language and Literacy Skills of School-Aged Children

2008 ◽  
Vol 9 (2) ◽  
pp. 66-70
Author(s):  
Jennifer Walz Garrett
Keyword(s):  
Literacy Skills ◽  
Assessment Tools ◽  
Treatment Goals ◽  
Miscue Analysis ◽  
Language And Literacy ◽  
Speech Language Pathologists ◽  
School Aged Children ◽  
School Based ◽  
Assessment Procedures ◽  
Tools And Methods

Abstract School-based speech-language pathologists assess students to establish eligibility, collect baselines for treatment goals, determine progress during intervention and verify generalization of skills. Selecting appropriate assessment tools and methods can be challenging due to time constraints, agency regulations, and availability of tests. This article will describe legal considerations, types of assessments, and the factors involved with the selection and use of various assessment procedures and tools. In addition, speech-language pathologists will learn to calculate words correct per minute (WCPM) and perform miscue analysis, which can provide additional language and literacy information about a child's educational needs.

Sign in / Sign up

Export Citation Format

Share Document