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.
