bring about chemical changes, and some of theproducts of a modern refinery complex are chemicals by any definition. The termpetrochemicalis used to describe these chemical operations, but, because they are often carried out at the same plant as the primary distillation, the distinction between petr...
In the permeation testing mode, the weight of the entire assembly is monitored; however, for use as degradation test, the test cell serves as a convenient means for evaluating changes in material mass and thickness. Visible observations are also recorded as part of the testing protocol. The ...
The data are split into k groups; one group is a test set, whereas the other is used as the training set. This is repeated k times to train and test the several groupings of the data. R 2 value (Also known as the coefficient of determination). A measure of how well a model fits...
China looks set to remain the fastest-growing major chemical market, but important changes are under way. To succeed in this next stage of development, China's chemical industry will need to embrace a new set of strategies.
The risin and tannin that can be extracted from it are sought by thechemicalindustry. 从中提取的松香和鞣酸是化学工业上很需要的. 《简明英汉词典》 The explosion of thechemicalplant has poisoned many local residents. 那座化工厂的爆炸毒死了许多当地居民. ...
Also, astronomers measure the motion of the gas with the Doppler Effect. ALMA’s unprecedented sensitivity enables us to detect weak radio emissions which are undetectable by other telescopes. In fact, because of their low abundances, cyclic-C3H2, and SO emissions are much weaker than, for ...
Multi-material systems interfaced with 2D materials, or entirely new 3D heterostructures can lead to the next generation multi-functional device architectures. Physical and chemical control at the nanoscale is also necessary tailor these materials as fun
We note that the vacancy dipoles and elastic constants are not exactly known for NNO. However, our conclusions remain valid if these parameters are simply within the same order of magnitude as used in the estimations. This condition is most likely satisfied for many ABO3 perovskites. We believe...
Some plants such as the oak tree have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material; eating such grasses wears down the animal's teeth. Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause...
In the dynamic landscape of global supply chains, chemical companies are encountering both significant challenges and new opportunities. Geopolitical disruptions, climate disruptions, and regional changes in policies and regulations, in addition to shifts in supply and demand, have made supply chain resili...