2500 chickens were treated intwo households (A and B), and divided into a test group and a contrast group in each of the households. 0.5% of "Cumian No.l" was added to the feeds of 1- to 15-day-olds of the test gr...2500 chickens were treated intwo households (A and B), and divided into a test group and a contrast group in each of the households. 0.5% of "Cumian No.l" was added to the feeds of 1- to 15-day-olds of the test group and 0.2% to the feeds of 16- to 44-day-olds of the test group. The result showed that compared with the contrast group, the average weight and survival rate increased by 4.786% and 2% respectively, and FIG decreased by 9.2% in the test group in household A; the average weight and survival rate increased by 3.608% and 2% respectively, and FIG decreased by 14.9% in the test group in household B.展开更多
Direct N2O decomposition has been investigated over bare NiO and a series of its alkali-promoted catalysts. These catalysts were characterized by X-ray diffractometry, X-ray photoelectron spectroscopy (XPS) and fiel...Direct N2O decomposition has been investigated over bare NiO and a series of its alkali-promoted catalysts. These catalysts were characterized by X-ray diffractometry, X-ray photoelectron spectroscopy (XPS) and field emission scanning electron microscopy. XPS analysis revealed that surface nickel is present in three forms: metal particles, NiO and Ni(OH)2. It is suggested that nickel(0) valent atoms are essential for the interaction with N2O molecules at the catalyst surfaces. Bare NiO exhibited a very low N2O decomposition reactivity. However, the alkali-containing catalysts exhibited a marked activity enhancement.展开更多
文摘2500 chickens were treated intwo households (A and B), and divided into a test group and a contrast group in each of the households. 0.5% of "Cumian No.l" was added to the feeds of 1- to 15-day-olds of the test group and 0.2% to the feeds of 16- to 44-day-olds of the test group. The result showed that compared with the contrast group, the average weight and survival rate increased by 4.786% and 2% respectively, and FIG decreased by 9.2% in the test group in household A; the average weight and survival rate increased by 3.608% and 2% respectively, and FIG decreased by 14.9% in the test group in household B.
文摘Direct N2O decomposition has been investigated over bare NiO and a series of its alkali-promoted catalysts. These catalysts were characterized by X-ray diffractometry, X-ray photoelectron spectroscopy (XPS) and field emission scanning electron microscopy. XPS analysis revealed that surface nickel is present in three forms: metal particles, NiO and Ni(OH)2. It is suggested that nickel(0) valent atoms are essential for the interaction with N2O molecules at the catalyst surfaces. Bare NiO exhibited a very low N2O decomposition reactivity. However, the alkali-containing catalysts exhibited a marked activity enhancement.