scholarly journals Submicroscopic metallic iron in lunar soils estimated from the in situ spectra of the Chang'E-3 mission

2017 ◽  
Vol 44 (8) ◽  
pp. 3485-3492 ◽  
Author(s):  
Zhenchao Wang ◽  
Yunzhao Wu ◽  
David T. Blewett ◽  
Edward A. Cloutis ◽  
Yongchun Zheng ◽  
...  
Keyword(s):  
Metallic Iron ◽  
Lunar Soils ◽  
In Situ Spectra

Study on space weathering of Chang′e-4 landing site by in situ spectra

2020 ◽  
Vol 49 (5) ◽  
pp. 20190460
Author(s):  
王振超 Zhenchao Wang ◽  
柳稼航 Jiahang Liu ◽  
盛庆红 Qinghong Sheng ◽  
吴昀昭 Yunzhao Wu
Keyword(s):  
Landing Site ◽  
Space Weathering ◽  
In Situ Spectra

Enhancement of Cocatalyst‐Coated ZnFe 2 O 4 Photoanode Grown In Situ on a Metallic Iron Substrate

2020 ◽  
Vol 7 (21) ◽  
pp. 4398-4404
Author(s):  
Yanjun Yin ◽  
Xiaodong Wang ◽  
Lei Li ◽  
Jinpei Hei ◽  
Yang Han ◽  
...  
Keyword(s):  
Metallic Iron

The chemistry of carbon in the lunar regolith

1977 ◽  
Vol 285 (1327) ◽  
pp. 369-377 ◽  
Keyword(s):  
Solar Wind ◽  
Chemical Reactions ◽  
Metallic Iron ◽  
Lunar Regolith ◽  
Current Status ◽  
Reactive Carbon ◽  
Lunar Soils ◽  
The Matrix ◽  
Micrometeorite Impact

The current status of knowledge concerning the chemistry of carbon in the lunar regolith is discussed. The respective roles of the solar wind and micrometeorite impact in contributing carbon and providing energy to stimulate chemical reactions and mobilize carbon phases are examined. Most detailed information has been obtained by releasing trapped species and decomposing reactive carbon phases by dissolution of lunar soils in concentrated deuterium labelled acids. The method has substantiated that hydrocarbons deriving from solar wind implanted carbon and hydrogen are present in the silicate. In addition to trapped species, a number of carbon phases chemically bound to the matrix have been recognized. The most important of these are an acid hydrolysable species associated with metallic iron and what appears to be a discrete ionic carbide which liberates acetylene. Although the majority of the solar wind implanted carbon may be released and quantitated by pyrolysis there is little information to identify which elements were bonded to the carbon in the sample, if indeed any bonds were present at all.

Metabolism of D-[1-13C]glucose in livers of Meriones unguiculatus infected with Echinococcus multilocularis

1995 ◽  
Vol 73 (1) ◽  
pp. 58-66 ◽  
Author(s):  
Marie Novak ◽  
Ashok Modha ◽  
Jonathan Lee ◽  
Richard Buist ◽  
Barry Blackburn
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Quantitative Evaluation ◽  
Perchloric Acid ◽  
Echinococcus Multilocularis ◽  
Glycogen Synthesis ◽  
Meriones Unguiculatus ◽  
Nmr Analysis ◽  
In Situ Spectra

Following administration of [1-13C]glucose, sequential 13C nuclear magnetic resonance (NMR) in situ spectra were obtained from the liver of uninfected jirds (Meriones unguiculatus) and those infected with Echinococcus multilocularis over a period of 2 h. Quantitative evaluation of the flow of labelled carbon through the liver at 80 and 120 min after glucose administration revealed that although the percentage of labelled glucose utilized by the liver was the same for both groups, glycogen synthesis differed. At both times, the livers of infected animals had incorporated a smaller percentage of the [1-13C]glucose into glycogen labelled at C1 and a larger percentage into the C6 position of glucose/glycogen. In another experiment, identical with respect to the substrate administered, NMR analysis of perchloric acid extracts revealed that the livers of infected animals had lower concentrations of labelled glucose and glycogen and higher concentrations of labelled alanine and lactate than those of uninfected controls. Concentration differences were also noted for some of the unlabelled metabolites. Echinococcus multilocularis cysts contained the same labelled metabolites as the livers but the concentration of lactate was much higher. Parasite cysts also contained labelled acetate.

scholarly journals An Empirical Model to Estimate Abundance of Nanophase Metallic Iron (npFe0) in Lunar Soils

2020 ◽  
Vol 12 (6) ◽  
pp. 1047 ◽  
Author(s):  
Dawei Liu ◽  
Yuanzhi Zhang ◽  
Guangliang Zhang ◽  
Bin Liu ◽  
Xin Ren ◽  
...  
Keyword(s):  
Grain Size ◽  
Empirical Model ◽  
Metallic Iron ◽  
Compositional Data ◽  
Lunar Soil ◽  
Soil Samples ◽  
Space Environment ◽  
Remotely Sensed Data ◽  
Lunar Soils ◽  
Size Groups

Lunar soils gradually become mature when they are exposed to a space environment, and nanophase metallic iron (npFe0) generates within them. npFe0 significantly changes the optical properties of lunar soils and affects the interpretation of the remotely sensed data of the lunar surface. In this study, a correlation analysis was conducted between npFe0 abundance and reflectance spectra at short wavelengths for lunar soil samples in four size groups based on their spectral and compositional data, collected by the Lunar Soil Characterization Consortium (LSCC). Results show that 540 nm single scattering albedo (SSA) of lunar soils correlates well with their corresponding npFe0 abundance for each size group of lunar soil samples. However, it is poorly correlated with npFe0 abundance when all size groups were considered because of the strong interference from grain size variation of lunar soils. To minimize the effect of grain size, the correlation of npFe0 abundance with the spectral ratio of 540 nm/810 nm SSA of all size groups for LSCC samples was calculated and results show that a higher correlation existed between them (R2 = 0.91). This ratio can serve as a simple empirical model for estimating npFe0 abundance in lunar soils. However, bias could be introduced to the estimation result when lunar soils possess a high content of agglutinitic glass and ilmenite. Our future work will focus on improving the model’s performance for these lunar soils.

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