Care And Maintenance - Bresser LCD-Micro Mode D'emploi

5.2 Textile fibers
Items and accessories:
1. Threads of different textiles: Cotton, line, wool, silk, Celanese, nylon etc..
2. Two needles
Each thread is put on a glass slide and frayed with the help of the two needles.
The threads are dampened and covered with a cover glass. The microscope is
adjusted to a low magnification. Cotton staples are of vegetable origin and look
under the microscope like a flat, turned volume. The fibres are thicker and
rounder at the edges than in the centre. Cotton staples consist primary of long,
collapsed tubes. Linen fibres are also vegetable origin; they are round and run
in straight lines direction. The fibres shine like silk and exhibit countless
swelling at the fibre pipe. Silk is animal origin and consists of solid fibres of
smaller diameter contrary to the hollow vegetable fibres. Each fibre is smooth
and even moderate and has the appearance of a small glass rod. Wool fibres
are also animal origin; the surface consists of overlapping cases, which
appear broken and wavy. If it is possible, compare wool fibres of different
weaving mills. Consider thereby the different appearance of the fibres. Experts
can determine from it the country of origin of wool. Celanese is like already the
name says, artificially manufactured by a long chemical process. All fibres show
hard, dark lines on the smooth, shining surface. The fibres ripple themselves/
crinkle after drying in the same condition. Observe the thing in common and
differences.
5.3 Salt water prawns
Accessories:
1. Prawn eggs (Fig 5.37 D)
2. Sea salt (Fig 5.37 C)
3. Prawn breeding plant (Fig 5.35)
4. Yeast (Fig 5.37 A)
5.3.1 The lifecycle of the saltwater prawn
The saltwater prawn or artimia salina to scientists has an unusual and interesting
lifecycle. The female's eggs are hatched without any male shrimp having to fertilise
them. The resultant baby prawns are all female. Under unusual circumstances such
as when a swamp is drained the eggs may produce male prawns. These males
fertilise the female's eggs, resulting in a specific type of eggs. These are called
winter eggs and have a thick shell as protection. They're pretty rugged and can
survive the swamp or lake drying out causing the death of the entire prawn
population for up to a decade in a form of hibernation. The eggs hatch once the right
ambient conditions again obtain. The eggs supplied (Fig 5.37 D) are of this type.
5.3.2 Hatching of the salt water prawn
To hatch the prawn it is essential to first have a saline solution suited to the prawn's
needs. Fill half a litre of rain- or fresh-water in a container. Let it stand for about
thirty hours. As water evaporates over time it's a good idea to have a second con-
tainer of such water left standing for thirty-six hours. Once it's stood for this length
of time pour half of the sea salt supplied into one of the containers (Fig 5.37 C)
and stir until it has dissolved. Then pour some of it into the prawn breeding plant
(Fig 5.35). Add a few eggs and close the lid. Put it somewhere with plenty of light
but not in the direct sun. The temperature should be approximately 25 C. The prawns
will hatch in two or three days at this temperature. Should any water evaporate
during this time replace it from the second container.
5.3.3 The saltwater prawn under the microscope
What comes out of the egg is known as a nauplius larva. Use the pipette
(Fig 5.34 B) to put some of them on a slide for examination. They will move in
the solution using their hair like limbs. Remove a few daily from the container
for examination under the microscope. If you do so and save the pictures
made with the MicrOcular you will then have a seamless record of the prawn's
lifecycle. You can remove the upper lid of the prawn bleeding plant and put the
whole thing under the microscope. The larvae will mature in six to ten weeks
depending on ambient temperature. You will soon have bred an entire
generation of saltwater prawns that constantly reproduce.
5.3.4 Feeding your saltwater prawns
To keep them alive saltwater prawns must be fed occasionally. This must be
done carefully as overfeeding causes the water to stagnate and poison the prawns.
Feeding is best down with dry powdered yeast (Fig 5.37 A). Give them a little
every other day. If the water darkens this signifies it is stagnating. If so remove
the prawns and put them in a fresh saline solution.
Note:
Shrimp eggs and shrimps are not suitable for consumption!
6. Image output and storage
The LCD Micro has three picture display and storage options:
a) View the picture on the LCD screen (sections 1+2.2). The device has
internal memory of about 128 MB for your photos (see section 3.2.)
b) You can store your photographs on a suitable memory card (SD = Secure
Digital). The memory card slot of the LCD Micro is on the left hand side of the
screen module (Fig. 1+2.1) above the USB connection. To use, push the
memory card, with the contacts at the front, into the slot, until they engage with
a faint click. If the installation is correct, a blue memory card symbol appears
above on the LCD monitor. This is again released by pressing and releasing the
memory card, which after a faint click, can be taken out of the slot. Your
photographs are now transportable.
c) If you connect your microscope to the PC using the USB cable provided (Fig.
5.32), you can transfer the photographs to the PC. The USB connection of the
LCD Micro is on the left side of the screen module (Fig. 1+2.1) under the
memory card slot. Put the smaller B-plug (Micro) into the socket on the
microscope and the larger A plug (PC) into a free USB port in your computer
(Fig. 5.32). After a successful USB connection, the operating system will
recognise new hardware and then two new drive assemblies will be initialised.
These are marked as "removable data carrier e" and "removable data carrier f:",
the letters vary depending upon the number of drive assemblies in your
computer. They are made available on the work station, as well as in Windows
Explorer. The first drive assembly recognized (e:) is the internal memory of the
screen module. The second (f:) contains – if a memory card is inserted – the
contents of the card.
Note:
1. The "Access SD card error!" after removing the card is to be acknowledged
by pressing OK.
2. If the card contains a lot of data the microscope module may be very slow
or not react (Crash). Please then remove the card, turn the power to the
microscope off, wait a bit and then start again.
3. If you delete a lot of data using DelFile / All this may not work first time round.
If so simply repeat it until it does.
Caution:
When taking a photograph, no USB connection between PC and
microscope may exist. Before you interrupt the USB connection or switch
the screen module off, you must remove the screen module (removable
data carrier e:) in the PC with the help of the hardware assistant and
"deactivate" the card drive assembly (removable data carrier f:) ! If the
drive assemblies are not deactivated, the PC might "crash" or there might
even be a loss of data!
Note:
If you wish to use your microscope with a memory card, then we recommend
the use of an SD-memory card (Secure Digital) with 1 GB storage capacity.

7. Care and maintenance

The microscope is a high quality optical appliance. Therefore you should make
sure that dust or moisture do not come into contact with your microscope.
Avoid putting fingerprints on any optical surfaces.
If dust or dirt should nevertheless have gotten onto your microscope, or the
accessories, you should first remove this with a soft brush.
Then clean the soiled area with a soft, lint-free cloth. To remove fingerprints from
the optical surfaces it is best to use a lint-free, soft cloth, to which you have
applied some alcohol.
After usage, you should stow the microscope and the accessories in their
correct containers again.
Remember:
A well maintained microscope will keep its optical quality for years and
thus maintain its value.
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