Mineralogical Study of Huashan Granite-Type Uranium Ore Deposit in Northeast of Guangxi

2012 ◽  
Vol 621 ◽  
pp. 17-22 ◽  
Author(s):  
Zhi Qiang Kang ◽  
Zuo Hai Feng ◽  
Yong Gao Huang ◽  
Hong Yi Chen ◽  
Wei Fu ◽  
...  
Keyword(s):  
Uranium Mineral ◽  
Ore Deposit ◽  
Granite Pluton ◽  
Uranium Ore ◽  
Mineralogical Characteristics ◽  
Granite Type ◽  
Mineralogical Study ◽  
Mineral Compositions ◽  
The Difference ◽  
Main Component

Huashan granite-type uranium ore deposit is originated within the Huashan granite pluton in northeast of Guangxi, the mineral (mineralization) occurrences already found include Changchong, Baishijiao and Caomiping. Previous studies are relatively weak, especially in mineralogical characteristics, in this paper, a detailed study of minerals has been carried out through EPMA and EDS, the results show that the uranium mineral compositions of the three mineral (mineralization) occurrences are significantly different, but all of them are of secondary uranium minerals, among them, the main component of Changchong mineral (mineralization) occurrence is (meta-) autunite, of Baijiaoshi mineral (mineralization) occurrence is kasolite, and of Caomiping mineral (mineralization) occurrence is torbernite and zeunerite, which reflect the difference of their minerals sources.

Mobilization and agglomeration of uraninite nanoparticles: A nano-mineralogical study of samples from the Matoush Uranium ore deposit

2017 ◽  
Vol 102 (9) ◽  
pp. 1776-1787 ◽  
Author(s):  
Michael Schindler ◽  
Aaron J. Lussier ◽  
Jacob Bellrose ◽  
Sergei Rouvimov ◽  
Peter C. Burns ◽  
...  
Keyword(s):  
Ore Deposit ◽  
Uranium Ore ◽  
Mineralogical Study

Radioactivity of spring and surface waters in the region of the uranium ore deposit at Žirovski vrh

1978 ◽  
Vol 44 (2) ◽  
pp. 307-315 ◽  
Author(s):  
I. Kobal ◽  
J. Kristan ◽  
M. Škofljanec ◽  
S. Jerančič ◽  
M. Ančik
Keyword(s):  
Surface Waters ◽  
Ore Deposit ◽  
Uranium Ore

scholarly journals Perbedaan kadar hemoglobin pada remaja gizi baik yang tinggal di pegunungan dengan yang tinggal di tepi pantai

e-CliniC ◽  
2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Marianne C. Jacobus ◽  
Max F.J Mantik ◽  
Adrian . Umboh
Keyword(s):  
Analytical Study ◽  
Nutrition Status ◽  
P Value ◽  
Cross Sectional ◽  
Significant Difference ◽  
Good Nutrition ◽  
The Difference ◽  
Cross Sectional Design ◽  
And Gender ◽  
Main Component

Abstract: Haemoglobin is the main component of red blood cells that serves as a transporter of oxygen and carbon dioxide in the blood. The normal range of haemoglobin values can be used to determine the degree of anemia according to age and gender. Geographical condition such as altitude influences the haemoglobin value. This study aimed to obtain the difference of haemoglobin levels between teenagers with good nutrition status who live at the highland and those at the seaside. This was an observational analytical study with a cross sectional design. Samples were students with good nutrition status of SMPN 3 Tomohon (living at the highland) and those of SMP Kristen Nazaret Tuminting (living at the seaside). There were 60 students who met the inclusion criteria as follows: adolescent, good nutrition status, healthy, aged 13-15 years, lived at the highland or at the seaside ≥ 6 month, and willing to be performed blood examinations, and had been approved by their parents. The Mann-Whitney test for the difference between haemoglobin levels of the two groups showed a p value < 0,001. Conclusion: There was a very significant difference between haemoglobin levels of good nutrition teenagers who lived at the highland and at the seaside. Keywords: haemoglobin levels, good nutrition, teenagers, highland, seaside  Abstrak: Hemoglobin merupakan komponen utama sel darah merah dan berfungsi sebagai transporter oksigen dan karbon dioksida dalam darah. Batas normal nilai hemoglobin dapat digunakan untuk menetapkan derajat anemia, dengan distribusi usia dan jenis kelamin spesifik didasarkan pada sampel referensi sehat. Kondisi geografis, seperti ketinggian tempat dari permukaan laut menjadi faktor pertimbangan dalam distribusi nilai normal hemoglobin. Penelitian ini bertujuan untuk mendapatkan perbedaan kadar hemoglobin antara remaja gizi baik yang tinggal di pegunungan dengan yang tinggal di tepi pantai. Jenis penelitian ini analitik-observasional dengan desain potong lintang. Sampel penelitian yaitu remaja gizi baik yang tinggal di pegunungan yaitu siswa SMPN 3 Tomohon dan yang di tepi pantai yaitu siswa SMP Kristen Nazaret Tuminting. Subjek penelitian berjumlah 60 remaja yang memenuhi kriteria inklusi yaitu gizi baik, sehat, berumur 13-15 tahun, berdomisili di pegunungan atau tepi pantai ≥6 bulan, bersedia dilakukan pemeriksaan darah, dan telah disetujui oleh orang tua. Data yang diperoleh dianalisis menggunakan uji Mann-Whitney dengan bantuan program SPSS. Hasil uji Mann-Whitney mengenai perbedaan kadar hemoglobin antara kedua kelompok menunjukkan nila p <0,001. Simpulan: Terdapat perbedaan yang sangat bermakna kadar hemoglobin remaja gizi baik yang tinggal di pegunungan dengan di tepi pantai.Kata kunci: kadar hemoglobin, remaja gizi baik, pegunungan, tepi pantai

Retrograde reactions involving galena and Ag-sulphosalts in a zoned ore deposit, Julcani, Peru

2002 ◽  
Vol 66 (6) ◽  
pp. 1043-1062 ◽  
Author(s):  
R. O. Sack ◽  
P. C. Goodell
Keyword(s):  
Solid State ◽  
Phase Equilibria ◽  
Exchange Reaction ◽  
Strong Evidence ◽  
Mining District ◽  
Strongly Correlated ◽  
Ore Deposit ◽  
Hydrothermal Mineralization ◽  
Sulphide Ores ◽  
Mineral Compositions

Abstract The sulphide ores from the Julcani mining district (Peru) display many retrograde reactions that may be attributed to solid-state processes accompanying cooling. Fahlores [˜(Cu,Ag)10(Zn,Fe)2(Sb,As)4S13] from the Herminia mine exhibit pronounced downstream enrichments in molar Ag/(Ag+Cu) ratios that are strongly correlated with the abundance of PbS-AgSbS2-AgBiS2 phases. These correlations, discontinuous core to rim Sb/(Sb+As) enrichments in bournonites, and prominent reaction textures involving fahlores, bournonites and galenas provide strong evidence that the fahlores in these ores have been enriched in Ag by the Ag–Cu exchange reaction which occurred during cooling following mineralization of a PbS-AgSbS2-AgBiS2 galena and has been documented elsewhere. Secondary PbS-AgSbS2-AgBiS2 minerals aramayoite, bismuthian diaphorite [Pb2Ag3(Bi,Sb)3S8], and diaphorite were produced from primary galenas with cooling of ores with high Pb/Cu and Bi/Sb; pyrargyrite formed from the breakdown of the Ag10Zn2Sb4S13 component in the most Ag-rich fahlores, as an exsolution product of galena, and from replacement of aramayoite and galena with the evolution of semimetal sulphides. Based on mineral compositions, phase equilibria, a thermochemical database for sulphides and sulphosalts, and the reintegrated composition for primary grains of Ag-rich PbS-AgSbS2-AgBiS2 phases, we estimate that the primary temperature of hydrothermal mineralization was >320±10°C, that these reactions ceased to affect fahlore Ag/(Ag+Cu) ratios and Bi/(Bi+Sb) ratios of aramayoite and miargyrite after cooling through 220±10°C. Galenas, however, appear to have continued to adjust their compositions to reflect even lower temperatures by continued exsolution of semimetals and production a diverse suite of sulphosalts that occur in fine intergrowths with galena.

scholarly journals The metabolism of 3,5-di-tert.-butyl-4-hydroxytoluene in the rat and in man

1968 ◽  
Vol 106 (4) ◽  
pp. 783-790 ◽  
Author(s):  
J W Daniel ◽  
J C Gage ◽  
D. I. Jones
Keyword(s):  
Enterohepatic Circulation ◽  
Minor Component ◽  
Aldehyde Group ◽  
Enzyme Mechanism ◽  
Mercapturic Acid ◽  
Rat Urine ◽  
Methyl Group ◽  
Tert Butyl ◽  
The Difference ◽  
Main Component

1. The major metabolites of 3,5-di-tert.-butyl-4-hydroxytoluene (BHT) in the rat are 3,5-di-tert.-butyl-4-hydroxybenzoic acid (BHT-acid), both free (9% of the dose) and as a glucuronide (15%), and S-(3,5-di-tert.-butyl-4-hydroxybenzyl)-N-acetylcysteine. 2. The mercapturic acid does not appear to derive from the usually accepted enzyme mechanism, and may involve a non-enzymic reaction between BHT free radical and cysteine. 3. The ester glucuronide and mercapturic acid found in rat urine are also the major metabolites in rat bile and must be responsible for the enterohepatic circulation. 4. Free BHT-acid is the main component in rat faeces. 5. In man, BHT-acid, free and conjugated, is a minor component in urine, and the mercapturic acid is virtually absent. The bulk of the radioactivity is excreted as the ether-insoluble glucuronide of a metabolite in which the ring methyl group and one tert.-butyl methyl group are oxidized to carboxyl groups, and a methyl group on the other tert.-butyl group is also oxidized, probably to an aldehyde group. 6. These differences in metabolism by the rat and by man are sufficient to account for the difference in excretion by the two species.

scholarly journals Reproduction performance of beef cattle mated naturally following synchronization in the Central Bushveld bioregion of South Africa

2015 ◽  
Vol 44 (5) ◽  
pp. 70-74
Author(s):  
SM Grobler ◽  
MM Scholtz ◽  
JPC Greyling ◽  
FWC Neser
Keyword(s):  
South Africa ◽  
Beef Cattle ◽  
Breeding Season ◽  
Recovery Period ◽  
Beef Cows ◽  
First Year ◽  
Natural Mating ◽  
The Difference ◽  
Calving Season ◽  
Main Component

The estimated calving percentage of beef cattle is 62% in the commercial sector of South Africa. Fertility is regarded as the main component influencing total herd efficiency in beef cattle. If the long calving seasons can be shortened and the calving percentage increased, more and heavier calves with a more uniform age can be weaned. Cows calving earlier in the season also have an extended “recovery period” and have the opportunity to calve in a better body condition during the next season, compared to cows calving late in the season. Cows that calve early also have a better chance of conceiving in the next breeding season and are generally seen as the more fertile animals. Research has been undertaken to evaluate the effect of oestrous synchronization followed by natural mating on the calving rate and calving distribution of multiparous beef cows. In this trial Bonsmara cows were mated naturally after synchronization over a period of four years (2009 - 2012) in an extensive production system on natural sour-mixed bushveld. The synchronized cows calved earlier during the 2009 calving season and cows in anoestrus started cycling again. The average days-to-calving after the start of the breeding season was 243 days for the synchronized cows and 267 for the non-synchronized cows. The calves born from the synchronized cows were therefore, on average, 24 days older than the calves born from the non-synchronized cows. From 2010 onwards the difference declined and it seems the biggest effect was obtained during the first year of synchronization.Keywords: Beef cattle, Marikana thorn veld, natural mating, oestrous synchronization

CAROTENOID CHANGES IN DIFFERENT MAIZE VARIETIES DURING RIPENING

1963 ◽  
Vol 41 (1) ◽  
pp. 481-486 ◽  
Author(s):  
J. Zsolt ◽  
Gy. Schneider ◽  
B. Matkovics
Keyword(s):  
Maize Varieties ◽  
The Difference ◽  
Main Component ◽  
Β Carotene

The authors investigated the carotenoids of different maize varieties of white, yellow, and red-colored grains in different phases of ripening. The carotenoids extracted from the grains were separated into benzene-soluble (epiphasic) and benzene-insoluble (hypophasic) fractions, and the components of these fractions were quantitatively measured and separated. The cause of the characteristic color of the grains is the difference in concentration of zeaxanthin, the main component of the hypophasic fraction. The following other carotenoids were demonstrated also: β-carotene, β-carotene-monoepoxide, violaxanthin, β-cryptoxanthin, antheraxanthin, xanthophyll, xanthophyll-monoepoxide, α-carotene. We could best explain the origin of the different carotenoids in terms of Cholnoky's theory.

Reduction and prediction of sandstone reservoir potential, Jurassic , North Sea

1985 ◽  
Vol 315 (1531) ◽  
pp. 187-202 ◽  
Keyword(s):  
North Sea ◽  
Burial Depth ◽  
Pore Waters ◽  
Secondary Porosity ◽  
Depth Data ◽  
General Decline ◽  
Mineral Compositions ◽  
The Difference ◽  
Detrital Mineral ◽  
Reservoir Potential

Porosity, permeability, mineralogical and depth data for two North Sea Jurassic sandstone sequences were analysed. Both sequences show statistically significant negative correlations between present burial depth and porosity. The influence of secondary porosity creation is subordinate to that of the general decline in porosity. For a given burial depth , sequence A is, on average, a little more porous (about 3%) than B. However, for a given porosity sequence A displays a permeability 1—3 orders of magnitude greater than B. The large permeability difference between A and B is a function of authigenic mineralogy. The only significant cement within the reservoir intervals of sequence A is quartz . Sequence B contains authigenic clays, quartz and subordinate carbonate. The abundant authigenic clay in B severely reduced permeability. In both instances, the cements are products of burial and were precipitated from pore waters expelled from shales during compaction. The expelled pore waters were both acidic and rich in solutes; a product of reactions between maturing organic matter, clays and iron oxides. The difference in authigenic mineralogy between the sequences was caused by the reaction between pore waters and sandstones with different detrital mineral compositions. Thus the present reservoir quality is a product of burial and of the reactions between evolving pore fluids and minerals in the sandstone.

THE RELATIVE PLACE OF EMPIRICAL AND ANALYTIC METHODS OF GEOPHYSICAL INTERPRETATION

Geophysics ◽  
1942 ◽  
Vol 7 (3) ◽  
pp. 281-288 ◽  
Author(s):  
Paul Weaver
Keyword(s):  
Iron Ore ◽  
Field Work ◽  
Empirical Methods ◽  
Ore Deposit ◽  
Border Line ◽  
Analytic Methods ◽  
Magnetic Methods ◽  
Geophysical Interpretation ◽  
History Of ◽  
The Difference

The pioneer in geophysics has, in most cases, used empirical methods on his first jobs in the field. Frequently, such an initial campaign has been successful in that valuable evidence has been obtained as to the position of a new ore‐deposit. Thereupon the method has received recognition so that additional parties have gone into field work; also, analytic methods have then been applied to show why the particular method succeeded in some cases and now far it would be likely to succeed in border‐line problems. After a discussion of the difference between empirical and analytic procedure, the author reviews the history of one geophysical project—the search for iron ore in the Lake Superior region by magnetic methods—describing the empirical efforts and the subsequent analysis. He then suggests that failures on certain other jobs might be less if the analysis be made earlier, and that there will be an economy, if this analysis be made before field work begins.

scholarly journals Origin of the Difference in the Resistivity of As-Grown Focused-Ion- and Focused-Electron-Beam-Induced Pt Nanodeposits

2009 ◽  
Vol 2009 ◽  
pp. 1-11 ◽  
Author(s):  
J. M. De Teresa ◽  
R. Córdoba ◽  
A. Fernández-Pacheco ◽  
O. Montero ◽  
P. Strichovanec ◽  
...  
Keyword(s):  
Voltage Dependence ◽  
Ion Beam ◽  
Carbon Matrix ◽  
Ex Situ ◽  
Semiconducting Materials ◽  
Dual Beam ◽  
Transmission Electron ◽  
The Difference ◽  
Main Component

We study the origin of the strong difference in the resistivity of focused-electron- and focused-Ga-ion-beam-induced deposition (FEBID and FIBID, resp.) of Pt performed in a dual beam equipment using(CH3)3Pt(CpCH3)as the precursor gas. We have performed in-situ and ex-situ resistance measurements in both types of nanodeposits, finding that the resistivity of Pt by FEBID is typically four orders of magnitude higher than Pt by FIBID. In the case of Pt by FEBID, the current-versus-voltage dependence is nonlinear and the resistance-versus-temperature behavior is strongly semiconducting, whereas Pt by FIBID shows linear current-versus-voltage dependence and only slight temperature dependence. The microstructure, as investigated by high-resolution transmission electron microscopy, consists in all cases of Pt single crystals with size about 3 nm embedded in an amorphous carbonaceous matrix. Due to the semiconducting character of the carbon matrix, which is the main component of the deposit, we propose that the transport results can be mapped onto those obtained in semiconducting materials with different degrees of doping. The different transport properties of Pt by FEBID and FIBID are attributed to the higher doping level in the case of FIBID, as given by composition measurements obtained with energy-dispersive X-ray microanalysis.

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