Using Limiting-Excess Stoichiometry to Introduce Equilibrium Calculations: A Discrepant Event Laboratory Activity Involving Precipitation Reactions

2002 ◽  
Vol 79 (4) ◽  
pp. 474 ◽  
Author(s):  
Stephen DeMeo
Keyword(s):  
Laboratory Activity ◽  
Discrepant Event ◽  
Precipitation Reactions ◽  
Equilibrium Calculations

BETHLEHEM LUKENS PLATE SPARTAN

Alloy Digest ◽  
2003 ◽  
Vol 52 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Yield Strength ◽  
Tensile Properties ◽  
High Strength Steels ◽  
High Strength ◽  
Tensile Yield Strength ◽  
Precipitation Reactions

Abstract Bethlehem Lukens Plate (BLP) offers five grades of Spartan high-strength steels with tensile yield strength over 690 MPa (100 ksi). These alloys contain copper for precipitation reactions. They also have improved weldability and toughness compared to ASTM A 514 and A 543 grades. This datasheet provides information on composition, microstructure, hardness, and tensile properties as well as fracture toughness. It also includes information on forming and joining. Filing Code: SA-518. Producer or source: Bethlehem Lukens Plate.

Benefits of Using the Invertebrate Model Organism C. Elegans in an Inquiry-Based Laboratory Activity

2021 ◽  
pp. 009862832110296
Author(s):  
Angy J. Kallarackal
Keyword(s):  
American Psychological Association ◽  
Model Organism ◽  
Learning Goals ◽  
Research Skills ◽  
Final Exam ◽  
Laboratory Activity ◽  
Writing Ability ◽  
C Elegans ◽  
Invertebrate Model ◽  
Laboratory Experiences

Background: The goals of laboratory experiences include developing knowledge base, research skills, and scientific communication abilities. Objective: The aim was to assess an inquiry-based laboratory activity using the model organism Caenorhabditis elegans in relation to learning goals. Method: Students in a Biopsychology laboratory course worked in groups to test the effect of various drugs (e.g., nicotine, ethanol, fluoxetine, and melatonin) on C. elegans behavior. The activity included literature review, experimental design, and a final lab report. A cumulative final exam included a synaptic communication question related to the content of the activity. Results: Students showed better retention of laboratory-related content compared to other topics from the course, as demonstrated through performance on the final exam and were able to replicate previous research demonstrating effects of drug on locomotion. However, students did not improve writing ability compared to performance on a previous American Psychological Association style lab report. Conclusion: This study demonstrates that using a student-designed, multi-week laboratory assignment in an undergraduate Biopsychology course supports the growth of psychology knowledge and the development of research skills. Teaching Implications: Instructors should consider using the described laboratory activity for biopsychology or behavioral neuroscience classes or consider similarly designed laboratory formats for other courses in Psychology.

Characterization of the order-annealing response of nanostructured iron-palladium based ferromagnetic thin-films

2001 ◽  
Vol 703 ◽  
Author(s):  
Huiping Xu ◽  
Adam T. Wise ◽  
Timothy J. Klemmer ◽  
Jörg M. K. Wiezorek
Keyword(s):  
Thin Films ◽  
Grain Growth ◽  
Room Temperature ◽  
Si Substrate ◽  
Ferromagnetic Thin Films ◽  
Precipitation Reactions ◽  
Post Deposition ◽  
Xrd And Tem ◽  
Iron Palladium

ABSTRACTA combination of XRD and TEM techniques have been used to characterize the response of room temperature magnetron sputtered Fe-Pd thin films on Si-susbtrates to post-deposition order-annealing at temperatures between 400-500°C. Deposition produced the disordered Fe-Pd phase with (111)-twinned grains approximately 18nm in size. Ordering occurred for annealing at 450°C and 500°C after 1.8ks, accompanied by grain growth (40-70nm). The ordered FePd grains contained (111)-twins rather than {101}-twins typical of bulk ordered FePd. The metallic overlayers and underlayers selected here produced detrimental dissolution (Pt into Fe-Pd phases) and precipitation reactions between Pd and the Si substrate.

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