and polyurethane paint at the same time. You can apply latex paint two days after the paint is applied (at 25°C), or after the latex paint is completely dry (it takes 7 days at 25°C) to paint again.
Zhong'an joint "addition, subtraction, multiplication and division" method to answer the cost reduction and efficiency increase volume
Time of Update: 2021-06-25
establishes the concept of working hard to reduce production costs, and strives to improve the awareness of cost reduction, potential tapping and efficiency creation, and clever use of "addition and subtraction" The four operating methods of "multiplication
Problems in TiO2 photocatalytic oxidation
Time of Update: 2021-06-18
The semiconductor carrier recombination rate is very high, resulting in the low quantum efficiency of the photocatalytic reaction.
Examples of balancing oxidation-reduction reaction equations
Time of Update: 2021-06-18
(4) Combine the two electrode reactions, eliminate electrons, and complete the balance of the redox reaction equation .
There is an answer to the problem of early gastric cancer screening!
Time of Update: 2021-05-07
with gastric cancer; 6. Other high-risk gastric cancers Factors (high salt, pickling, smoky diet, smoking, heavy drinking, etc. ). > "The above six criteria meet any
Heat-resistant high-temperature coatings solve the problem of oxidation and corrosion of materials
Time of Update: 2021-02-26
the problem of oxidation and corrosion of materials at high temperatures. For example, steel reacts easily with gas contact at high temperatures, and the effective substances of steel metal produce other invalid substances, which have a great impact
Energy: Directed reduction of graphene oxide for spontaneous electricity production
Time of Update: 2020-12-06
Cheng Huhu, Tsinghua University, and Professor Quliang team constructed the symmetrical graphene oxide by means of directional thermal reduction, proposing a new type of generator (Figure 1) that can spontaneously generate electricity from the air.
Health food problems are emerging in Japan, opening hotlines to answer questions.
Time of Update: 2020-10-02
, by the consultant responsible for answering questions. hotline consulting service was set up by a group of Japanese consumer life consultants. 10 a.m. on November 9, the Tokyo District Advisory Commissioner has begun to answer questions
Which alcohols are prone to alcohol problems? Russian medical experts give the answer.
Time of Update: 2020-09-06
Russian medical experts have given the answer Russian anesthesiologist and psychiatrist Igor Lazarev has revealed the different characteristics of alcoholism between men and women, pointing out that the most dangerous drinks are often those considered harmless.
Paint knowledge: the history of the most complete latex paint problem answer! Must see!
Time of Update: 2020-04-03
12、 What are the causes of the visual color difference on the wall after the application of emulsion paint?
What should we do if there are problems in drug evaluation? "Dispute resolution procedure of drug registration review conclusion" gives you the answer
Time of Update: 2019-11-27
On the evening of November 26, CDE issued a notice to solicit opinions from the dispute resolution procedure for the conclusion of drug registration review, in order to coordinate
oxidation-reduction neutral "borono catelani" amination reaction
Time of Update: 2019-08-23
The author: Chen Shuqing and Wang Peng aromatic amines are widely found in active natural products and pharmaceutical products
The efficient synthesis of aromatic amines
of heteroatom alkanes under the cooperation of photo oxidation reduction catalyst and hydrogen atom transfer catalyst
Time of Update: 2019-06-21
Introduction: monofluoroalkenes are widely used in material science and pharmaceutical chemistry, for example, to improve the efficacy, lipid solubility and anti enzyme degradation
in the study of visible light photocatalytic oxidation-reduction reaction
Time of Update: 2019-05-29
The separation of carriers can be improved by making full use of photo generated holes and electrons to drive redox reaction, coupling two valuable organic reactions into a photocatalytic reaction system, and avoiding the introduction of additional sacrificial agents.
Academy of Sciences, has made important progress in the field of selective catalytic reduction of nitrogen oxides
Time of Update: 2018-12-20
The research results have been successfully applied to the development and mass production of SCR catalyst with low vanadium and high activity for tail gas purification of heavy diesel vehicles.
ACS catalyst: Photo oxidation-reduction catalyzed Z-selective addition of diarylphosphonate oxide to alkyne
Time of Update: 2018-11-17
Z-alkene is the basic structure of bioactive natural products
In all the methods of preparing this kind of molecules, the addition reaction of alkynes is a simple, high