Pipettes are among the standard equipment of medical laboratory and allow for exact dosing of liquids, e.g. during blood analysis or for determination of various substance concentrations. Depending upon purpose of use, various pipette types are used in laboratories. Pipettes are completed by various sizes of Pipette Tips. Choosing the right pipette tip comes down to the pipette quality relevant to the devices precision.
Yingmed offers a selection of pipettes and various pipette tips for you. With the Number reading variable volume pipette, you can easily choose the desired volume with the push of a button; measurement errors are virtually completely eliminated. When it comes to pipette tips, you have the choice between many sizes.
You can find additional laboratory supplies like Embedding Cassettes,Petri deshes,Blood roller mixer in the Medical Lab Devices category.
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1) Disease characteristics: During the mushrooming period of some mushroom or mature mushrooms, brownish yellow discoloration patches appear on a few of the mushroom caps. In severe cases, the sun burns and burns spots. The discolored parts of the bacteria are thin, and the texture is slightly hardened. Suppressed, but will not cause dry rot or death; larvae after the disease, as long as the control of the cause, with the development of mushroom body lesions will gradually fade fade.
2) Cause: The disease occurs in an outdoor plastic mushroom shed. The reason is that the quality of the plastic film used as a cover has a problem, that is, the film contains some kind of chemical substance that is easily soluble in water and can cause discoloration of the mushroom. When the temperature difference between the inside and the outside of the mushroom shed is large, condensed water containing such harmful chemical substances will form on the membrane in the shed. Condensed water repeatedly drips on the cap of the mushroom and can cause discoloration reaction in the local tissue.
3) Control measures: Select a drip-free membrane with strong anti-pollution ability and good weather resistance; the scaffolding should be built into an arch or “human†shape, so that the condensed water on the plastic film does not directly fall into the bacterial bed; Within the mushroom shed, a certain amount of ventilation should be maintained to reduce the temperature difference between the inside and outside of the shed and reduce the formation of condensate.
(2) Blue oyster mushroom
1) Disease characteristics: When the disease occurs, a blue halo is generated at the edge of the cap, after the condition is aggravated, the surface of the mushroom body is covered with a blue cover until the harvest does not disappear, and the time of the disease is long and the color is darker. The discolored parts of the blue oyster mushroom are mainly concentrated on the epidermis of the cap of the mushroom, and the bacteria and stipe are generally not discolored, and the shape of the mushroom body remains unchanged, and the phenomenon of development obstruction is not obvious. The change in the internal composition of the discolored structure of the blue oyster mushroom is not yet clear, and no adverse reactions were observed after the mushroom was eaten, but its appearance often causes consumers to doubt.
2) Cause: During the period of the long mushroom, the coal stove is heated in the mushroom farm, or the kitchen is close to the kitchen. Because the smoke generated from coal and firewood contains more toxic gases such as ethylene, sulfur dioxide and carbon monoxide, plus Poor ventilation, resulting in poisoning of the mushroom body, and then change the color reaction. According to the survey, in the mushroom house where the blue oyster mushroom occurred, the gray-brown and gray-white oyster mushroom species are generally susceptible, while the milk-white oyster mushroom species are not sensitive. It is preliminarily inferred that the factors causing discoloration of the mushroom body are related to the chemical composition of the mushroom body.
3) Control measures: Warming measures in winter mushroom farms should adopt solar energy, heating, electric heating and other methods. If coal fire, firewood and other methods are used for heating, pyrotechnic pipes with closed heat transfer should be installed.
Pleurotus eryngii cap discoloration (1) coke yellow oyster mushroom