Inexpensive quality television camera suitable for use with operating microscope

Successful retrieval of the television camera and other components from the Surveyor III spacecraft by the Apollo 12 astronauts has provided a unique opportunity to study the effects of a known and relatively extensive exposure to the lunar environment. Microstructural effects including those produced by micro-meteorite impact, radiation damage (by both the solar wind and cosmic rays) and solar heating might be expected in the materials used to fabricate the spacecraft. Samples received were in the form of 1 cm2 of painted unpainted aluminum alloy sheet from the top of the camera visor (JPL Code 933) and the sides (935,936) and bottom (934) of the lower camera shroud. They were prepared for transmission electron microscopy by first hand-grinding with abrasive paper to a thickness of 0.006". The edges were lacquered and the sample electropolished in 10% perchloric methanol using the “window” method, to a thickness of ~0.001". Final thinning was accomplished by polishing 3 mm punched disks in an acetic-phosphoric-nitric acid solution.

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In Situ Observation of Catalyzed Gasification of Graphite by Nickel

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100097090 ◽

1981 ◽

Vol 39 ◽

pp. 76-77

Author(s):

R. T. K. Baker ◽

R. D. Sherwood

Keyword(s):

Objective Lens ◽

In Situ Observation ◽

Gas Flows ◽

Catalytic Gasification ◽

Television Camera ◽

Viewing Screen ◽

Fuels And Chemicals ◽

Gasification Of Carbon ◽

Transmission Microscope

The catalytic gasification of carbon at high temperature by microscopic size metal particles is of fundamental importance to removal of coke deposits and conversion of refractory hydrocarbons into fuels and chemicals. The reaction of metal/carbon/gas systems can be observed by controlled atmosphere electron microscopy (CAEM) in an 100 KV conventional transmission microscope. In the JEOL gas reaction stage model AGl (Fig. 1) the specimen is positioned over a hole, 200μm diameter, in a platinum heater strip, and is interposed between two apertures, 75μm diameter. The control gas flows across the specimen and exits through these apertures into the specimen chamber. The gas is further confined by two apertures, one in the condenser and one in the objective lens pole pieces, and removed by an auxiliary vacuum pump. The reaction zone is <1 mm thick and is maintained at gas pressure up to 400 Torr and temperature up to 1300<C as measured by a Pt-Pt/Rh 13% thermocouple. Reaction events are observed and recorded on videotape by using a Philips phosphor-television camera located below a hole in the center of the viewing screen. The overall resolution is greater than 2.5 nm.

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Imaging sub-micron objects with light microscopy: Visualization of the T-4 bacteriophage

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100156158 ◽

1989 ◽

Vol 47 ◽

pp. 834-835

Author(s):

Malcolm Brown ◽

Reynolds M. Delgado ◽

Michael J. Fink

Keyword(s):

Electron Microscopy ◽

Light Microscopy ◽

Focal Plane ◽

Phase Contrast ◽

Dark Field ◽

E Coli ◽

Polystyrene Beads ◽

Television Camera ◽

Transmission Electron ◽

Universal Microscope

While light microscopy has been used to image sub-micron objects, numerous problems with diffraction-limitations often preclude extraction of useful information. Using conventional dark-field and phase contrast light microscopy coupled with image processing, we have studied the following objects: (a) polystyrene beads (88nm, 264nm, and 557mn); (b) frustules of the diatom, Pleurosigma angulatum, and the T-4 bacteriophage attached to its host, E. coli or free in the medium. Equivalent images of the same areas of polystyrene beads and T-4 bacteriophages were produced using transmission electron microscopy.For light microscopy, we used a Zeiss universal microscope. For phase contrast observations a 100X Neofluar objective (N.A.=1.3) was applied. With dark-field, a 100X planachromat objective (N.A.=1.25) in combination with an ultra-condenser (N.A.=1.25) was employed. An intermediate magnifier (Optivar) was available to conveniently give magnification settings of 1.25, 1.6, and 2.0. The image was projected onto the back focal plane of a film or television camera with a Carl Zeiss Jena 18X Compens ocular.

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Parallel Integration of the Operating Microscope, Neuronavigation and Endoscope by Using HD Picture-in-Picture Image Injection System: A Proof of Concept Based on Laboratory Dissection

Skull Base ◽

10.1055/s-2011-1274267 ◽

2011 ◽

Vol 21 (S 01) ◽

Cited By ~ 1

Author(s):

Asem Salma ◽

Tariq Lamki ◽

Mario Ammirati

Keyword(s):

Injection System ◽

Operating Microscope ◽

Proof Of Concept ◽

System A ◽

Parallel Integration

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Retrieval of fractured Endodontic Instrument under dental operating microscope using ultrasonic tips : A Case Report

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v11i3.2463 ◽

2020 ◽

Vol 11 (3) ◽

pp. 3316-3321

Author(s):

Samrudhi Khatod ◽

Anuja Ikhar ◽

Pradnya Nikhade ◽

Manoj chandak

Keyword(s):

Case Report ◽

Root Canal ◽

Fracture Resistance ◽

Root Canal Treatment ◽

Operating Microscope ◽

Severe Loss ◽

Mechanical Procedure ◽

Root Dentin ◽

Fracture Level

A Patient came with the complaint of pain in the lower right back region of the jaw. Root canal treatment was planned. While preparing for the bio-mechanical procedure, the Hand pro taper fractured in the apical third. Iatrogenic occurred as a result of the fracture of the endodontic instrument. Retrieval of the fractured instrument was planned to complete the cleaning and shaping of the canal. The removal of the fractured instrument was planned to be done under the Dental Operating Microscope. The use of an operating microscope enhanced the illumination and the magnification of the instrument. This illumination and magnification helped in the precision of removal. The ultrasonic tip enabled to reach of the fractured instrument in the canal and loosen the dentin around the fractured instrument. It allowed easy retrieval of the fractured instrument. During the retrieval procedure, the fractured instrument was bypassed before the use of the ultrasonic tip. After the removal of the fractured instrument, cleaning and shaping were completed, followed by obturation, definitive restoration, and prosthesis. As the removal of the fractured instrument enabled complete cleaning and shaping, it improved the prognosis of the case. When the endodontic instrument gets fractured, it should be analyzed over the radiograph to assess the fracture level, the anatomy of the root canal, size of the fractured instrument, check accessibility, stage of fracture, etc. If all the above criteria are met with the removal of the instrument only then, replacement should be tried. Otherwise, it may lead to a severe loss of root dentin, decreasing fracture resistance of the root.

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UTILIZAÇÃO DO MICROSCÓPIOS OPERATÓRIOS NA ENDODONTIA

10.36238/23595787.artcient.00010262020 ◽

2020 ◽

Author(s):

◽

Lucas Zabeu ◽

Felipe Potgornik Ferreira

Keyword(s):

Quality And Safety ◽

Operating Microscope ◽

Human Eye ◽

The Moment ◽

Clinical Cases

The operating microscope is of paramount importance for the endodontist to develop his work with a higher quality and safety to achieve the success of a treatment to be developed, being able to help him in several clinical cases that may arise during the day-to-day of care, from its magnification (providing a greater amount of details that would normally go unnoticed by the human eye) and from its coaxial lighting (capable of eliminating shadows in the region to be worked), which can be used from the moment of diagnosis until its completion and complications, such as fractures of instruments that need to be removed

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A technique for endoscopic pituitary tumor removal

Neurosurgical FOCUS ◽

10.3171/foc.1996.1.1.3 ◽

1996 ◽

Vol 1 (1) ◽

pp. E3 ◽

Cited By ~ 18

Author(s):

Michael D. Cusimano ◽

Ronald S. Fenton

Keyword(s):

Case Report ◽

Minimally Invasive ◽

Pituitary Tumor ◽

Tumor Resection ◽

Region Of Interest ◽

Operating Microscope ◽

Tumor Removal ◽

Endoscopic Techniques ◽

Effective Manner ◽

Highly Effective

A number of milestones have marked the development of transsphenoidal pituitary tumor resection this century. The introduction of headlamp illumination, followed by the use of the operating microscope and fluoroscopy have allowed neurosurgeons to perform this surgery in a safe and highly effective manner. With the aid of a case report, we describe the incorporation of endoscopic techniques in pituitary tumor resection. The technique described is minimally invasive, avoiding septal dissection and allowing unsurpassed, unobstructed, and panoramic visualization of the region of interest to the surgeon and operative team.

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