CCTV: Paper straws are hard to find, and polylactic acid straws enter the market
Time of Update: 2022-09-25
Zhou Xiaoling, general manager of a paper product company in Zhejiang:From October 2020 to April 2021, the production capacity of paper straws can be three to five million per day, and hundreds of boxes of goods will be shipped every day .
A new type of biological composite artificial blood vessel was successfully developed
Time of Update: 2022-09-20
On September 11, the reporter learned from Nankai University that the research group of Professor Zhao Qiang of the School of Life Sciences and the State Key Laboratory of Medicinal Chemical Biology
Modified melamine formaldehyde flocculant
Time of Update: 2021-10-21
(1) Preparation of melamine formaldehyde resinFirst add water and raw material melamine into a three-necked flask, adjust the pH of the reaction system to 8.
(2) CationizationThe temperature of the reaction system is controlled at 70-80°C, formaldehyde and dimethylamine solution are slowly added, and the material is discharged after reacting for 2-5 hours .
I didn’t answer these 5 questions correctly, don’t say you understand uric acid and gout
Time of Update: 2021-03-27
However, on the other hand, BMI cannot completely determine people's risk of gout, because there is another indicator that is very important-waist-to-hip ratio.
Alkalize urine and avoid drugs that raise uric acid levels.
Save 2.9 billion yuan! Jiangxi Guotze and provincial harvest transcripts came out
Time of Update: 2021-01-01
. The average price of 25 selected drugs collected by the first batch of countries decreased by 59.84 percent, and the amount of online procurement in the past year was 525 million yuan, which was 2,059 million yuan compared to the pre-implementation purchase price.
Time of Update: 2020-11-24
For example, the carboxyl in the carbide under the influence of hydroxyl become very inactive, not with HCN, NaHSO 3 and other pro-nuclear reagements to increase the reaction, and its hydroxybiol base is easy to dissointegate, showing weak acidity.
In the anions of nitric acid, the averageization of bonds occurs due to the off-field action of electrons.
Subcutaneous 5% glucose injection treatment type 2 complex regional pain syndrome 1 case
Time of Update: 2020-06-23
Complex regional pain syndrome (COMPLEX regional pain syndrome, CRPS) refers to a spontaneous, regional chronic pain that is aggravated The pain area does not conform to the nerve-dominated cortex r
Code for construction of metal surface pretreatment and powder coating
Time of Update: 2020-02-13
Abstract: the pretreatment of powder coating is very important for the quality of powder coating In this paper, the pretreatment methods of various metal substrates are discussed in detail There are m
Breaking through 70 years of foreign technology monopoly to pick the "pearl" of polyurethane crown
Time of Update: 2019-12-19
fat/ring isocyanate (ADI) is the core raw material for the production of high-grade polyurethane, and its prepared polyurethane material has become a key base material to support the development of
The prices of these drugs have increased dozens of times
Time of Update: 2019-10-15
On October 14, Guizhou medicine centralized purchase platform issued the notice on the independent quotation of drugs in Guizhou medicine shortage list (the second batch) (hereinafter referred to as t
Reduction (3 + 2) cyclization of benzoyl and pyran salt
Time of Update: 2019-08-02
In recent years, the redox adducts of o-dicarbonyl compounds and trivalent phosphine reagents have become a very important class of α - carbonyl carbene analogues, which are used in a series of cycliz
Genetic genes of medicinal components of Glycyrrhiza uralensis
Time of Update: 2011-11-29
A research team from Osaka University in Japan found the genetic gene of Glycyrrhiza, a plant often used in traditional Chinese medicine, to make pharmaceutical ingredients, and successfully produced
Check valve overview
Time of Update: 2009-04-06
Check valve: check valve is also known as one-way valve or check valve Its function is to prevent backflow of medium in the pipeline The bottom valve of water pump is also a check valve The opening an