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SAMPLING TOOLS AND TECHNIQUES

Sampling Tools for Biological Science

Our Center has a well equipped lab that contains all the chemicals and equipments required for Biological sample preparation

Tissue processor

Tissue processor are used for slow agitation of biological specimens in their appropriate fixation, dehydration, intermediate and embedding chemicals to produce more thorough and uniform infiltration and exchange of chemicals in the specimens.

1. Holds up to 56 specimens.


2. Holds up to 7 baskets for 4 0r 8 small specimens or 3 baskets for 3 large specimens.


3. Program steps can be individually controlled from 1 minute to 99 hours 59 minutes.


4. Up to 10 programs may be stored with selection of time, temperature and agitation for each of the 20 steps.


5. Programmable delay starts of program.


Glass Knife Maker.

Reichert Glass Knife maker to produce high Quality triangular 45° glass Knives for Ultramicrotomy with long Cutting edge from special 6, 4, 8 and 10mm, thick glass.

Ultramicrotome

The ultramicrotome is used for preparation of semithin and ultrathin sections of biological and industrial samples. Sections of different thicknesses can be prepared.These sections are used for observation in light and electron microscopes. Glass knives as well diamond knives are used in cutting.

Vibratome 1000

The Vibratome 1000 employs an accurate vibrating blade principle that allows sectioning without freezing or embedding, so the viability of the fresh tissue can be maintained.

Ultrostainer

E.M. Grid stainer for safe and automatic double staining of ultra thin sections with sealed and stabilized air free packed stains. Ultra thin sections are automatically stained to yield high-contrast, precipitate free specimens. The microprocessor of ultrastainer is programmed for a basic staining sequence suitable for most applications. For special staining, however, it is possible to set your own parameters

Dry Pumping Station + TEM specimen holder Workstation

This system is used for the dry pumping of the cryo holder of the cryo transfer system and double tilt cryo holder for JEM-1200 EX II TEM.

Critical Point Dryer

Critical point dryer is used for dehydrating biological tissue prior to examination in the Scanning Electron Microscope. This way the sample structure of the sample is preserved and no damage occurs due to surface tension.

Sampling Tools for Material Science

Our Center has a well equipped lab that contains all the chemicals and equipment required for material sample preparation

High Resolution Ion Beam Coater

The device is designed for cutting, etching and/or coating samples by the instrumentality of ion beam. Ion cutter is used to prepare samples for EM analysis. The instrument also serves for deposition of various conductive elements on the surface of samples for SEM, TEM and EBSD

Disc Punch Model 659

The preferred method for preparing disks from ductile materials such as metals. This disc punch is specifically designed to avoid compression and distortion of the sample. It cuts a disc size of 3mm (2.3mm) diameter and material thickness ranging from 10 µm to above 100 µm.

TEM Specimen Disc Grinder Model 623

Prethins and polishes specimens for shorter ion milling times.

Precision Dimple Grinder Model 656

This grinder will reduce, with minimal damage, the central region of a typical 100µm thick and 3mm diameter specimen blank to a few micrometers in times ranging from 20 minutes for silicon to 100 minutes for sapphire. Subsequent chemical or particle beam thinning is then completed rapidly to produce large electron transparent areas.

Specimen Mounting Hot Plate

It is most important that specimens are firmly attached during ultrasonic cutting. This is best done by using a low melting point wax polymer to form a strong, thin, hard adhesive band. The specimen mounting hotplate is thermostatically controlled at the precise mounting temperature of 130°C. The hotplate also contains recesses to hold the specimen mounts in place when bounding the discs.

Specimen Lapping Kit

This kit consists of a heavy metal base, 3 ultra-flat glass lapping plates and 60 adhesive lapping discs. The metal base holds the glass plates in place as the disc grinder is moved with a figure-eight action over the lapping discs. 40µm, 15µm and 5µm grit are used in sequence to produce highly polished specimens.

Ultrasonic Disc Cutter Model 601

The disc cutter is gentle enough to cut discs from wafers as thin as 50µm and also powerful enough to cut 5 mm long cylinders from bulk materials in only minutes. The cutting tool is driven by a crystal piezo (lead zirconate / itanate) at a frequency of 28 KHZ. The cutting medium consists of a water based slurry of silicon or boron carbide. A constant tool load is automatically maintained during cutting to give the maximum erosion rate attainable without risking thermal or microstructure damage to the TEM specimen, the depth of cut is displayed continually on a dial indicator (10µm resolution) which is mechanically coupled to the specimen platform.

DuoMill TM Model 600

Ion beam milling is now the preferred method for preparing TEM specimens of ceramics, semi conductors and metals. Ion beam milling is done by dual ion guns. Ion beams aimed at glancing angles of incidence to the specimen i.e. ~ 12°. Low angle thinning has the advantage that it produces larger thin areas of specimen. While minimizing beam heating and radiation damage effects, the machine is equipped with a low powered optical microscope that can be situated directly above the specimen. The process of ion beam thinning will be automatically terminated as the specimen perforates by Laser Auto terminators. Also variable speed specimen rotation is available.

Specimen Cutter

Small, automatic precision cut-off machine for sectioning all materialographic and ceramic specimens.
Minitom is very easy to operate, with fixation of the specimen and the setting of specimen size, cutting speed, and cutting pressure taking only a few minutes. The workpiece is fastened in a holder mounted on a movable arm.
Minitom is a small, low-speed, precision cut-off machine for sectioning all types of materials. Maximum specimen size: 30 mm dia. The cutting speed is continuously variable and the motor is designed to ensure that the selected speed remains constant at any load.

Thinning Device

Apparatus for automatic, electrolytical thinning of specimens for examination in a transmission electron microscope. With the built-in scanning function and additional enhancement functions parameters for new materials can easily be established.

Specimens with a diameter of 2.3 and 3 mm dia are polished from both sides simultaneously to achieve a thin foil with a centre hole as small as possible. The thinning is controlled by an infrared light source, stopping the process as soon as the first light can pass through the established hole.

Sampling Tools for Both Biological Science and Material Science

Balance

pH Meter

Shaker

Ultrasonic Bath

Centrifuge

Sputter Coater

Vacuum Oven