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Query: UMLS:C0268318 (
ICP
)
10,007
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
The mechanism of ZnO sulfidation with sulfur and iron oxide at high temperatures was studied. The thermodynamic analysis, sulfidation behavior of zinc, phase transformations, morphology changes, and surface properties were investigated by
HSC
5.0 combined with FactSage 7.0,
ICP
, XRD, optical microscopy coupled with SEM-EDS, and XPS. The results indicate that increasing temperature and adding iron oxide can not only improve the sulfidation of ZnO but also promote the formation and growth of ZnS crystals. Fe
2
O
3
captured the sulfur in the initial sulfidation process as iron sulfides, which then acted as the sulfurizing agent in the late period, thus reducing sulfur escape at high temperatures. The addition of carbon can not only enhance the sulfidation but increase sulfur utilization rate and eliminate the generation of SO
2
. The surfaces of marmatite and synthetic zinc sulfides contain high oxygen due to oxidation and oxygen adsorption. Hydroxyl easily absorbs on the surface of iron-bearing zinc sulfide (Zn
1-x
Fe
x
S). The oxidation of synthetic Zn
1-x
Fe
x
S is easier than marmatite in air.
...
PMID:Mechanism study on the sulfidation of ZnO with sulfur and iron oxide at high temperature. 2818 56
Carcinostatic effects of combined use of hydrogen nano-bubbles (nano-H) and platinum-povidone (PVP--Pt) were examined. Hydrogen-dissolved medium was prepared by hydrogen-gas bubbling with a microporous gas-emittance-terminal into a medium in the absence or presence of PVP-Pt (nano-H, nano-H/PVP-Pt). Human esophagus-derived carcinoma cells KYSE70 were repressed for cell proliferation with nano-H/PVP-Pt more markedly than with nano-H, indicating the hydrogen-intensification for PVP-Pt-alone-carcinostasis. However, the intensified carcinostasis required co-administration of nano-H and PVP-Pt, and no intensified carcinostasis was shown in two-step separate administration of nano-H and PVP-Pt. Furthermore, hydrogen bubbling into PVP-Pt-containing medium achieved more appreciable carcinostasis than mere addition of PVP-Pt into nano-H-containing medium, indicating the potent interaction of hydrogen and PVP-Pt. The nano-H/PVP-Pt-administered human tongue-derived carcinoma cells
HSC
-4 were repressed for cell proliferation more markedly than pre-malignant human tongue-derived epitheliocytes DOK, concurrently with more abundant intracellular Pt-intake into
HSC
-4 cells than DOK as analyzed by
ICP
-MS. Thus, PVP-Pt is able to adsorb hydrogen nano-bubbles on Pt and applicable for cancer therapy by diminishing the side-effects to normal cells.
...
PMID:Hydrogen-bubbled platinum-colloid suppresses human esophagus- or tongue-carcinoma cells with intracellular platinum-uptake and the diminished normal-cell mortality. 3271 Feb 59
