Colloidal Carbon as Revealed by the Electron Microscope

1942 ◽  
Vol 15 (3) ◽  
pp. 664-671
Author(s):  
William B. Wiegand ◽  
William A. Ladd
Keyword(s):  
Electron Microscope ◽  
Surface Area ◽  
Ohio State University ◽  
Theory And Practice ◽  
Critical Conditions ◽  
State University ◽  
New Approach ◽  
Synthetic Rubber ◽  
Electron Lens ◽  
First Time

Abstract The electron microscope of today may be said to rest on the pioneer work of three outstanding physicists. J. J. Thompson, in 1897, discovered electrons under the name of negative corpuscles. De Broglie, about 1922, established the wave characteristics of electrons. In 1926 Busch established the electron lens. In 1935, E. F. Burton, following a visit to Germany, envisaged the enormous potentialities of the electron microscope and began a program at Toronto designed to eliminate the serious defects of early German instruments. In 1938, this program culminated in the construction of a new and superior instrument by two of his graduate students, A. Prebus and J. Hillier. The publication of their results early in 1939 aroused the immediate interest of the Columbian Carbon Company which later established a Fellowship at Toronto under Professor Burton's direction. In 1940, A. Prebus, assisted by W. A. Ladd, working in Toronto, secured for Columbian the first perfect pictures of Micronex, from which accurate data as to mean surface area and as to particle shape were obtained. Public release followed in June, 1940. Prebus is now Professor at Ohio State University and is pursuing the theoretical side. Hillier is at R. C. A., where instruments, of essentially Toronto design, are being developed commercially, and Ladd has joined the Columbian Carbon Research Laboratories, for the two-fold purpose of further improving the microscope and of applying it to the problems of natural and synthetic rubber reënforcement. This work of Professor Burton and his pupils is of importance under present critical conditions since the replacement of natural by synthetic rubber necessitates a new approach to the theory and practice of rubber reënforcement. With the aid of the electron microscope, it is now for the first time possible to evaluate the role played by surface area in carbon-rubber reënforcement.

Youngest Radiocarbon Age for Jefferson's Ground Sloth, Megalonyx Jeffersonii (Xenarthra, Megalonychidae)

2015 ◽  
Vol 83 (2) ◽  
pp. 355-359 ◽  
Author(s):  
H. Gregory McDonald ◽  
Thomas W. Stafford ◽  
Dale M. Gnidovec
Keyword(s):  
Organic Compounds ◽  
Ohio State University ◽  
State University ◽  
Radiocarbon Age ◽  
Geological Museum ◽  
Initial Discovery ◽  
Ground Sloth ◽  
First Time ◽  
Partial Skeleton

A partial skeleton of the extinct ground sloth, Megalonyx jeffersonii, recovered from a farm near Millersburg, Ohio in 1890, was radiocarbon dated for the first time. The ungual dated is part of a skeleton mounted for exhibit at the Orton Geological Museum at Ohio State University and was the first mounted skeleton of this animal. From its initial discovery the bones were treated with multiple organic compounds that had the potential to compromise the radiocarbon age and the specimen required special treatments in order to obtain a valid radiocarbon age. The 14C measurement on the ungual from this skeleton (11,235 ± 40 14C yr BP = 13,180–13,034 cal yr BP) is the youngest 14C age presently determined for M. jeffersonii.

Projects

1988 ◽  
Vol 81 (9) ◽  
pp. 759-775
Keyword(s):  
High School Students ◽  
The United States ◽  
Ohio State University ◽  
Theory And Practice ◽  
State University ◽  
British Petroleum ◽  
School Students ◽  
Cooperative Effort ◽  
Board Of Regents ◽  
The Ohio State University

The Ohio State University Calculator and Computer Precalculus Project (C2PC) is a curriculum revision project designed to improve the mathematics preparation of college-bound high school students. The project is a cooperative effort of Ohio State University's mathematics department and the educational theory and practice department and of the Columbus, Southwestern, and Upper Arlington City school districts. Over fifty other high schools throughout the United States participated in the field test. Funding for the project comes from the Ohio Board of Regents. British Petroleum (Ohio), and the National Science Foundation.

Pam Gems, Jane Lapotaire, and a Phenomenon Named Piaf

2017 ◽  
Vol 33 (3) ◽  
pp. 219-226
Author(s):  
Jane Lapotaire
Keyword(s):  
Doctoral Dissertation ◽  
Ohio State University ◽  
State University ◽  
Award Winning ◽  
International Attention ◽  
Male Dominated ◽  
The Ohio State University ◽  
First Time

In this interview, award-winning actress Jane Lapotaire talks about the process of devel - op ing the central role in Pam Gems's Piaf, for which she won the Tony Award for Best Actress in 1981. She further describes how Gems gave her the chance to play a protagonist for the first time in her career in the British male-dominated theatre of the late 1970s. Gems established herself as a major feminist playwright in the British theatre in 1976 with the production of Dusa, Fish, Stas and Vi, although it was Piaf that brought her international attention and acclaim. Lapotaire discusses the significance of the female mission to create protagonist roles for women in the theatre who did not previously have the opportunity to drive a play's narrative. Esmaeil Najar is a translator, director, and theatre historian. He is currently writing his doctoral dissertation at the Ohio State University on Pam Gems's life and impact on British theatre.

A New Approach to Teaching Veterinary Public Health at the Ohio State University

2008 ◽  
Vol 35 (2) ◽  
pp. 160-165 ◽  
Author(s):  
Armando E. Hoet ◽  
Robert J. Caswell ◽  
Fred J. DeGraves ◽  
Paivi J. Rajala-Schultz ◽  
Wondwossen A. Gebreyes ◽  
...  
Keyword(s):  
Public Health ◽  
Ohio State University ◽  
State University ◽  
New Approach ◽  
Veterinary Public Health ◽  
Approach To Teaching ◽  
The Ohio State University

Five Decades of Research Experience in Speech Anatomy and Physiology

2016 ◽  
Vol 1 (5) ◽  
pp. 4-12
Author(s):  
David P. Kuehn
Keyword(s):  
Ohio State University ◽  
State University ◽  
Research Experience ◽  
University Of Iowa ◽  
University Of Illinois ◽  
Anatomy And Physiology ◽  
The Ohio State University ◽  
Speech Science ◽  
The University ◽  
East Carolina University

This report highlights some of the major developments in the area of speech anatomy and physiology drawing from the author's own research experience during his years at the University of Iowa and the University of Illinois. He has benefited greatly from mentors including Professors James Curtis, Kenneth Moll, and Hughlett Morris at the University of Iowa and Professor Paul Lauterbur at the University of Illinois. Many colleagues have contributed to the author's work, especially Professors Jerald Moon at the University of Iowa, Bradley Sutton at the University of Illinois, Jamie Perry at East Carolina University, and Youkyung Bae at the Ohio State University. The strength of these researchers and their students bodes well for future advances in knowledge in this important area of speech science.

Cardiology Fellowship Education in the Era of High-density Training, Data Tracking, and Quality Measures

2011 ◽  
Vol 9 (2) ◽  
pp. 99
Author(s):  
Alex J Auseon ◽  
Albert J Kolibash ◽  
◽  
Keyword(s):  
Ohio State University ◽  
Training Data ◽  
State University ◽  
Training Requirements ◽  
Healthcare Environment ◽  
Medical Centers ◽  
Work Hour ◽  
The Ohio State University ◽  
Data Tracking

Background:Educating trainees during cardiology fellowship is a process in constant evolution, with program directors regularly adapting to increasing demands and regulations as they strive to prepare graduates for practice in today’s healthcare environment.Methods and Results:In a 10-year follow-up to a previous manuscript regarding fellowship education, we reviewed the literature regarding the most topical issues facing training programs in 2010, describing our approach at The Ohio State University.Conclusion:In the midst of challenges posed by the increasing complexity of training requirements and documentation, work hour restrictions, and the new definitions of quality and safety, we propose methods of curricula revision and collaboration that may serve as an example to other medical centers.

SCANNING ELECTRON MICROSCOPE: POSSIBILITIES FOR STUDYING KIDNEY DISEASES

2020 ◽  
pp. 176-182
Author(s):  
Mamaeva S.N. ◽  
Vinokurov R.R. ◽  
Munkhalova Ya.A. ◽  
Dyakonova D.P. ◽  
Platonova V.A. ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Filtration Rate ◽  
Kidney Diseases ◽  
First Time ◽  
Scanning Electron

Currently, due to the intensive development of high-tech science-intensive medical and research devices, more and more attention is paid to the development of diagnostics of rare and difficult to diagnose diseases. It is known that among numerous nephropathies, hematuria may be the only symptom of kidney and urinary tract diseases, which complicates their diagnosis and treatment. In order to develop new approaches for the diagnosis of nephropathies, the authors have been studying the morphology of red blood cells in the blood and urine of children and adults using a scanning electron microscope for several years. The paper presents the results of studies of children with various kidney diseases, including IgA-nephropathy, and chronic glomerulonephritis. Scanning electron microscopy was used for the first time to detect nanoparticles on the surface of red blood cells, the size of which is comparable to the size of viruses, which became the basis for one of the authors ' assumptions, namely, the possible transport of certain types of viruses by red blood cells. Thus, some kidney diseases could be considered virus-associated. This paper presents for the first time the results of determining the glomerular filtration rate of both kidneys separately in the study of separate kidney function and of the study of urine smears obtained during catheterization of the ureters in patients with hydronephrosis of one of the kidneys by scanning electron microscopy. As in previous studies, nanoparticles were found on the surface of red blood cells, which leads to the conclusion about the possible viral nature of the disease of the considered patient. In addition, smear images obtained using a microscope showed a significant difference in the elements of the right and left kidneys urine, which did not contradict the data on the study of glomerular filtration rate. According to the authors, the capabilities of the scanning electron microscope can be applied in fundamental research of kidney diseases at the cellular and molecular levels, forming new ideas about their origin, as well as on the basis of which new methods of non-invasive diagnostics can be built.

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