The SH-118 quick growth hair blackening oil produced by the Shanghai Yifa Health Care Industry Co. is made of effective ingredients extracted from natural wild plants on the principle of Chinese traditional medicine c...The SH-118 quick growth hair blackening oil produced by the Shanghai Yifa Health Care Industry Co. is made of effective ingredients extracted from natural wild plants on the principle of Chinese traditional medicine combined with modern scientific technology, There is neither any harmful chemical composition, nor side-effect. The product is a kind of brownish semi-transparent oily liquid, having the functions of aiding general weakness,展开更多
Lubrication failure accompanying with blackening phenomenon significantly reduces the long-running operational reliability of porous polymide(PPI)lubricated with poly-α-olefin(PAO)oil.Here,the effects of lubrication ...Lubrication failure accompanying with blackening phenomenon significantly reduces the long-running operational reliability of porous polymide(PPI)lubricated with poly-α-olefin(PAO)oil.Here,the effects of lubrication condition and counter-surface chemistry on the blackening failure of PAO impregnated PPI were studied through the comparison of the tribological tests against GCr15 steel ball and Al_(2)O_(3)ceramic ball with and without PAO oil lubrication.Black products were found to be formed on the PAO impregnated PPI surface slid against steel ball or Al_(2)O_(3)ball added with iron nano-particles,but be absent under the conditions without iron or PAO oil.Further analysis indicated that the iron-catalyzed splitting of PAO oil into small molecule alkanes and following the formation of black organic matter should be mainly responsible for the blackening phenomenon.Molecular dynamic(MD)simulations demonstrated that the iron facilitated the separation of hydrogen atom and the following broken of C–C bonds in PAO molecules,final resulting in the splitting of PAO oil.展开更多
The United States is under increasing international pressure to shut down the detention facility at Guantanamo Bay and eliminate alleged secret prisons Secret airlines, secret detainees, secret jails. These form the n...The United States is under increasing international pressure to shut down the detention facility at Guantanamo Bay and eliminate alleged secret prisons Secret airlines, secret detainees, secret jails. These form the network of a clandestine U.S. Central Intelligence Agency (CIA) operation, referred to as "black sites" in classified White House, CIA,展开更多
文摘The SH-118 quick growth hair blackening oil produced by the Shanghai Yifa Health Care Industry Co. is made of effective ingredients extracted from natural wild plants on the principle of Chinese traditional medicine combined with modern scientific technology, There is neither any harmful chemical composition, nor side-effect. The product is a kind of brownish semi-transparent oily liquid, having the functions of aiding general weakness,
基金supported by the National Natural Science Foundation of China(Nos.52350411 and 52122507)the National Key R&D Program of China(No.2023YFB3405500)+1 种基金Sichuan Science and Technology Program(Nos.2023NSFSC1988 and 23NSFTD0030)the Independent Project of State Key Laboratory of Traction Power(No.2023TPL-T04).
文摘Lubrication failure accompanying with blackening phenomenon significantly reduces the long-running operational reliability of porous polymide(PPI)lubricated with poly-α-olefin(PAO)oil.Here,the effects of lubrication condition and counter-surface chemistry on the blackening failure of PAO impregnated PPI were studied through the comparison of the tribological tests against GCr15 steel ball and Al_(2)O_(3)ceramic ball with and without PAO oil lubrication.Black products were found to be formed on the PAO impregnated PPI surface slid against steel ball or Al_(2)O_(3)ball added with iron nano-particles,but be absent under the conditions without iron or PAO oil.Further analysis indicated that the iron-catalyzed splitting of PAO oil into small molecule alkanes and following the formation of black organic matter should be mainly responsible for the blackening phenomenon.Molecular dynamic(MD)simulations demonstrated that the iron facilitated the separation of hydrogen atom and the following broken of C–C bonds in PAO molecules,final resulting in the splitting of PAO oil.
文摘The United States is under increasing international pressure to shut down the detention facility at Guantanamo Bay and eliminate alleged secret prisons Secret airlines, secret detainees, secret jails. These form the network of a clandestine U.S. Central Intelligence Agency (CIA) operation, referred to as "black sites" in classified White House, CIA,
