Stereo microscopes

For visual observation of the cell interior through the sapphire windows a lamp mounted behind one end is used. A mirror and stereo microscope at the other end facilitate the observation. The microscope is equipped with a normal camera or a video camera. Normally the phenomena within the cell are continuously observed and controlled with video camera and colour monitor. A video recorder serves for documentation, for inspection of short time processes and for the production of standing flame pictures for size and shape determination. Instead of the microscope a Jarrell-Ash diode array rapid scan spectrometer can be attached to the cell to obtain flame spectra in the visible and UV-regions. 

Stereo microscope Olympus S2X2-ILLT used for fetal heart and skeletal examination. 

The fetus is examined over a light source for grade of ossification, number, position and shape of bones in the skull, thorax (ribs, vertebrae, sternum, pectoral girdle), pelvic girdle, extremities, and tail (see Table 3), a stereo microscope is used if necessary. 

Unfortunately, the working distance for commercial stereo microscopes is rather short, and the microscope also does not accommodate readily the usual large glove box with a vertical or slightly inclined window. A single-chamber evacu-able dry box is available commercially which would appear to be satisfactory for crystal mounting and other operations in which the apparatus is not large.2... 

P 52] A double-syringe pump was used for liquid feed [142]. An iodine-starch solution was mixed with a photographic fixer solution in a ratio of 1 3.5. Thereby, the intense blue color changed to pale blue. The mixing process was followed by means of a stereo microscope. 

Optical microscopy to observe volume changes was done with a Zeiss stereo microscope, using a 3 mm high round sample cell. 

In preparation for the experiments, the library components were removed from the bead by exposing it to trifluoroacetic acid vapor for 30 min. After the cleavage reaction was complete an internal standard was added together with the matrix solution for the laser desorption. The matrix was formed around the bead within 15-30 min and MALDI-TOF analysis was performed directly from the sample well. Results are shown in Fig. 4 where a variety of peptides was monitored in addition to bradykinin, which acted as the internal calibrant. As for all MALDI experiments, it was critical that the right matrix be chosen for the analysis. After initial examinations of different matrices under a stereo microscope followed by the MALDI-TOF experiment, dihy-droxy-benzoic acid (DHP) was found to produce the largest crystals and the best results. 

Fermenter sterility testing requires a room with a laminar flow hood to prepare plates, tubes and shake flasks. Space needs to be provided for incubators and microscopes. Since it is very important to identify when infection occurs in large scale production, microscopic examination of shake flasks is usually preferred because a large sample can be used, and it gives the fastest response. Similarly, stereo microscopes are used for reading spiral streaks on agar plates before the naked eye can see colonies. 

Fig. 12 Microphotograph of an analyte concentrator fabricated with FAb antibody fragments immobilized to controlled-pore glass silica. The irregularly shaped beads were housed between two frit structures. The analyte concentrator device was connected to two separation capillaries by a Teflon sleeve. The plastic connector was glued to the separation capillaries by an epoxy resin. The entire fabrication process was monitored by an stereo microscope. (For details of experimental conditions, see Ref. 120.)...

The sample is initially examined under a zoom stereo microscope, individual fibres are carefully removed from the sample matrix and placed into an appropriate refractive index liquid to be examined. 

Beck Binomax stereo-microscope mounted over the DSC sample holder. The light detector was a Vickers CdS photoconductive cell which had a large light-sensitive area and a maximum response at 545 nm. The signal from the detector was amplified by a operational amplifier. Both DSC and light detector cell signals were recorded on a strip-chart recorder. 

After the end of the test, the specimens were subjected to visual appraisal, and also examined under a stereo microscope (Zeiss) to assess the corrosion attack. 

The particles or the thin section may be examined under the stereo microscope or, using fiber-optic oblique lighting with the petrographic microscope. Colors obtained are iron-free calcite, red iron-poor calcite, mauve iron-rich calcite, purple iron-free dolomite, not stained ferroan dolomite, light blue anker-ite, dark blue. 

Make the chromosome spreads. Under the stereo microscope in 1-2 drops (10-30 pL) of 45% acetic acid on a clean slide, tease the material to fragments with a fine needle, isolate the meristem, and remove all other tissue from the slides, in particular the root cap, which is tough and prevents squashing see Note 5). Apply a cover slip. Carefully tap the cover slip with a needle and then gently squash the material between glass slide and cover slip see Note 6). Check the preparation under a phase contrast microscope. 

Where the object is transportable (e.g., tools), it is suitable to bring it to the laboratory (covering the paint trace with papers) for a research under a stereo microscope and the following collection will be undertaken by means of tweezers or a metal point if circumstances allow it, it would be useful to cut vehicle body or to collect a piece of the support as a wooden forced doorway or a tagged wall. If possible, in searching for paint traces, the scientist must consider the possibility of a cross-transfer. Paint fragments on textiles are searched with lens and under the stereo microscope using tweezers, and then... 

For both solubility and microchemical tests, reactions and color changes must be observed under a stereo microscope concurrently for unknown and control samples at different time intervals, in order to detect differences. 

Dissecting stereo microscope with transmitted light base. 

Working under the stereo microscope, hold a small clump of ovary with one pair of watchmakers forceps and gently pull off individual oocytes using a second pair. 

Collect the medium with a pipette and yellow tip, immediately add fresh unlabeled MBS, and then transfer the oocytes to a petri dish of MBS. Examine the oocytes under the stereo microscope to check that they are healthy. Good oocytes from batches containing dead ones can normally be analyzed for intracellular products, but the medium from these batches should be discarded. 

Color comparison Chips laid side by side under a stereo microscope Visual matching, adhering debris, possible to automotive-paint reference collection ... 

Examination under polarized light on the stereo microscope. 

Examine the sample, preferably in the glass vial. Determine the presence of any obvious fibrous component. Estimate a percentage based on previous experience and current observation. Determine whether any pre-preparation is necessary. Determine the number of phases present. This step may be carried out or augmented by observation at 6 to 40 X under a stereo microscope. 

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