>>> Graphic show: This website friend's decoration regret summary
Home improvement "incurable diseases"
1, home improvement project "layer subcontracting"
With the changes in the concept of consumer spending, home improvement companies have become a trend. Some of the former decoration workers, who were once called “marathon guerrillas,†have accumulated experience and experience. After the funds, one after another went to the industrial and commercial department to register and set up the company. However, consumers are increasingly demanding home improvement company brands and services and do not look at small and medium-sized decoration companies. This group of people found that their prospects did not change after the establishment of the company, so many people went to the brand decoration company as project managers.
Although many decoration companies now claim to not subcontract, the actual project manager's management of construction workers is relatively flexible. Almost every project manager has a contact with a group of workers in his or her hands. Usually there is no salary payment and no employment contract. When a project starts, the project manager calls the worker by telephone.
Among these workers, quality is good or bad, and some workers are serious and responsible. They are not inferior to decoration companies. However, if the construction quality is not good, the interests of consumers will not be guaranteed. It is recommended that the majority of property owners should not rely on the home improvement company that sells on the door, let alone the low price of the “guerrilla guerrillasâ€. They should go for more, see more, and more than one. After determining the decoration company, they must first look at their business licenses. With the qualification certificate, when signing the contract, it is required to provide a home-installed contract printed by the country, avoiding loopholes in the contract and eliminating worries.
2, home improvement environmental protection "complaints first"
In recent years, with the fiery home improvement market, environmental protection issues have become increasingly prominent, and various types of disputes and deaths caused by renovation pollution have frequently occurred. A considerable number of consumers lack comprehensive and specific environmental protection knowledge. This has made home improvement companies and guerrillas with irregular operations take advantage of difficulties because of the long duration of home improvement, complicated processes, and mixed material markets. Pollution and environmental protection indicators exceeded.
According to the survey, 68% of the diseases are related to indoor air pollution, and 9% of children with leukemia have recently undergone renovations at home. 65% of fetal malformations are due to excessive formaldehyde in the room. Home improvement environmental protection is increasingly concerned by the people.
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The cover glass is covered on the material on the glass slide, which can avoid the contact between the liquid and the objective lens, so as not to contaminate the lens, and can make the top of the observed cells in the same plane, that is, the distance from the objective lens is the same, so that the observed Images are clearer.Why do you need a coverslip when using a microscope
1. Make the object to be observed form a thin film, which is easy to transmit light and easy to observe;2. Make the specimen relatively fixed;
3. It is convenient to use the capillary phenomenon to form a gradient when adding various reagents (staining agent, acid, salt solution);
4. Avoid contamination of the specimen.
The purpose of staining the specimen with iodine solution is to make the cells more obvious under the microscope, and it can also kill the cells and prevent the cells from migrating.
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