How do you make a specimen? How to make a specimen

1. Collect the leaves of the plant, bring them back to the room, treat the dirt on the surface of the leaves with a cotton swab, and remove the wilted leaves.

2. Follow the texture of the blade, clean off the sludge on the surface of the blade, then dry it, and fix the specimen with a glue belt to make it not deformed.

3. Put the leaves in the specimen, cover the top and bottom of the leaves with a piece of absorbent paper, and absorb the water.

4. Press a heavy object on top of the book with the specimen and wait quietly for a few days.

Specimens are animals, plants, minerals and other physical objects that have undergone various treatments so that they can be preserved for a long time and as far as possible in their original appearance, so as to be provided for exhibitions, demonstrations, education, identification, research and other research purposes.

Specimen processing methods can be taken from the whole individual (or even multiple individuals, such as bacteria, algae and other microorganisms, or such as fungi and other small individuals clustered together), or a part of the sample is dismantled, after physical air drying, vacuum, chemical preservative treatment and other treatments can be made.

Some of them become samples and can be made by physical air drying, vacuum, chemical preservative treatment, etc.

Pin insertion. Specimen production with needle insertion goes through the following 8 steps:

Kill In order to make a specimen with a complete body, color and morphology, it is often necessary to use the freshly caught live insects to make them die quickly in a short time.

Poison bottles and tubes can be made of wide-mouth glass bottles, the size of the bottle mouth can be determined according to the size of the insect body, and the cork should be corked, not corroded rubber stoppers. Put some sawdust at the bottom of the bottle first, and then pour the liquid medicine to achieve just enough saturation and the liquid medicine does not flow out, and then cover the medicine layer with thick paper or cork. There should be several ventilation holes in the paper or wood chips to allow the poison gas to pass through.

In order to achieve just enough saturation and no outflow of the liquid medicine, then cover the medicine layer with thick paper or cork chips. There should be several ventilation holes in the paper or wood chips to allow the poison gas to pass through.

2.Removal of internal organs Before making a specimen, the internal organs of the insect must be removed so that they can be dried quickly after the needle is inserted.

But insects with very small bodies, like the damselflies in dragonflies, don't have to be gutted.

During dissection, forceps can be inserted directly from the neck and anterior thoracic dorsal junction of the worm to remove each organ.

Or make an incision on the side of the abdomen along the membrane connecting the dorsal plate and the web plate, and then remove the viscera with forceps.

Then use absorbent cotton to pinch into a long strip of cotton plugs, and slowly stuff it into the hollowed out insect's abdominal cavity with tweezers to maintain the original body shape of the insect.

3.Temporary storage After the insect is killed by poisonous gas, it should be taken out of the poison bottle as soon as possible, and after the internal organs are removed, it should be placed in a pre-prepared cotton paper bag to avoid the insects being squeezed and deformed and damaged when carried.

The paper wrapped in cotton paper should be cut into squares with good water absorption, and the size should be determined according to the size of the insect body, so as to be able to wrap the insect body as the degree. Absorbent cotton can be pulled into a small piece about a centimeter thick, slightly smaller than the paper, flattened and placed in the middle of the paper.

It is best to have a small piece of white paper attached to the absorbent cotton as a temporary cotton swab to record the time and place of collection.

Once ready, the bugs can be temporarily encased after the internal organs have been removed to prevent them from being damaged and deformed.

The shelf life should not be too long, should be within 1 2 days, pay attention to open the bag in time, let it ventilate and dry, and do not deteriorate.

4.Soft insect shells are generally brittle after drying and hardening, and if you do not take measures to soften them, they are likely to break into small pieces when touched, so it is necessary to make them soft before inserting the needle.

The way to return the soft is to exchange the glass for a soft tank or other utensils, add distilled water to the bottom, add a few drops of carbolic acid, place insects on the overhead shelf, and cover and seal for 2 to 3 days before changing the softness.

If there is no equipment to change the soft tank, the worm can also be directly immersed in warm water, and hot air can also be used to make it soft.