Note on cobaltiferous Mispickel from Sulitjelma, Norway

1904 ◽  
Vol 14 (63) ◽  
pp. 54-55 ◽  
Author(s):  
Mark Fletcher
Keyword(s):  
Chemical Analysis ◽  
Specific Gravity ◽  
Naked Eye ◽  
White Colour ◽  
Iron Pyrites

Some months ago Professor Henry Louis presented to this college several isolated crystals which he had brought from the Sulitjelma (or Sulitelma) mines in Arctic Norway: they occur there in masses of copper-pyrites and iron-pyrites, for which this district has been famed for some years.The crystals are of various sizes, ranging in length from 4 to 8 mm. They have a metallic lustre and silver-white colour. The fracture is uneven, and no cleavage is visible. On a freshly broken surface small yellow particles can be seen with the naked eye; these also have a metallic lustre, and are probably iron-pyrites, a probability which is strengthened by the appended chemical analysis. The specific gravity varies from 5.94 to 6.02, and the hardness is just under 5. The crystals are all of a pronounced rhombic aspect.

RESEARCH ON THE BOTANICAL AND PHARMACOGNOSTIC PARTICULARITIES OF THE INDIGENOUS SPECIES LYSIMACHIA NUMMULARIA L.

2021 ◽  
Author(s):  
Suciu Felicia ◽  
Arcuș Mariana ◽  
Roșca Adrian Cosmin ◽  
Bucur Laura ◽  
Popescu Antoanela ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Native Species ◽  
Reproductive Organs ◽  
Indigenous Species ◽  
External Appearance ◽  
Vegetative Organs ◽  
Naked Eye ◽  
Hydrophilic Nature ◽  
Macroscopic Examination

"Preliminary pharmacochemical research on Lysimachia nummularia L. was performed by dint of pharmacognostic analysis (macroscopic examination, global chemical analysis, preliminary quantitative determinations).The article includes the analysis of the macroscopic characters of the vegetative organs (root, stem and leaf), as well as of the reproductive organs (flower, fruit, seed) belonging to the spontaneous native species Lysimachia nummularia L. Morphological features were described and discussed. The identification of these aspects was done with the naked eye, but also with the help of a hand magnifier and a binocular magnifier. The results revealed that the external appearance of the plant justifies the species belonging to the genus Lysimachia, family Primulaceae. They are found in the glabrous and creeping appearance of the plant, opposite, almost round leaves, solitary, yellow flowers, axillary with vigorous pedicels, perianth pentamer, actinomorphic, dialisepal and dialipetal, globular capsule fruit. The semi-hydrophilic nature is found in the presence of adventitious roots that develop both from the rhizome and at the nodes of the stem. The preliminary quantitative determinations performed were loss by drying as well as soluble substances of the species Lysimachia nummularia L. Following the global chemical analysis, active principles known in the literature for the antioxidant potential were identified. Following the preliminary quantitative determinations (drying loss, determination of soluble substances) results comparable to those in the literature on the content of volatile substances and soluble substances were obtained."

Urinalysis

Nursing OSCEs ◽  
2012 ◽  
Author(s):  
Jane Lovegrove
Keyword(s):  
Chemical Analysis ◽  
Low Cost ◽  
Microscopic Investigation ◽  
Accurate Information ◽  
Clinical Settings ◽  
Acute Care Setting ◽  
Urethral Meatus ◽  
Naked Eye ◽  
Nurse Students ◽  
Diagnostic Reagent

Urinalysis simply means analysis of urine. It is an easily performed investigation that can detect a wide variety of abnormalities within a few minutes at low cost. Urinalysis is an investigation which all nurses should be competent to perform and is identified by the NMC (2007) as being an example of an essential skill nurse students should be competent to perform before entering their branch programme. Urinalysis may be performed in a wide variety of clinical settings. It should be performed on every patient entering the acute care setting. Additionally, the National Confidential Enquiry into Patient Outcome and Death (NCEPOD (2009), stresses the need for urinalysis to be performed on all emergency admissions to an acute hospital. It may also be performed in outpatient and general practice clinics, and community areas. To obtain the most accurate information from the test, students need to know how to obtain and assess a sample of urine and be aware of factors that may influence the reliability of the investigation. Urine may be tested in three different ways. ● Macroscopic urinalysis, ● Microscopic urinalysis, ● Chemical analysis. Macroscopic and chemical analysis are the investigations performed in the clinical setting which may be tested by OSCE. Microscopic investigation requires samples to be sent to a laboratory. Macroscopic analysis is the analysis of the urine by the naked eye. Chemical analysis may be performed by use of a plastic diagnostic reagent strip or ‘dipstick’ which contains small pads of chemicals which react to substances that may be found in urine. For purposes of testing urine at random, clients are asked to urinate into a clean but not sterile dry container with no precautions regarding contamination. In females in particular this may result in samples being contaminated by vaginal fluids, such as blood or mucus. Due to the risk of contamination a mid-stream specimen of urine may be required if an abnormality is found in a random sample. A mid-stream specimen requires cleaning of the external urethral meatus prior to urination, passing the first half of the bladder contents into the lavatory, and passing the second part of the urine flow into a sterile container.

scholarly journals DETERMINAÇÃO DAS PROPRIEDADES ENERGÉTICAS DA MADEIRA E DO CARVÃO VEGETAL PRODUZIDO A PARTIR DE Eucalyptus benthamii

FLORESTA ◽  
2014 ◽  
Vol 45 (1) ◽  
pp. 57 ◽  
Author(s):  
Daniela Letícia Nones ◽  
Martha Andreia Brand ◽  
Alexsandro Bayestorff Da Cunha ◽  
Adriel Furtado De Carvalho ◽  
Solange Maria Krug Weise
Keyword(s):  
Chemical Analysis ◽  
Specific Gravity ◽  
Calorific Value ◽  
Biomass Energy ◽  
Energetic Properties ◽  
Different Ages ◽  
End Use ◽  
Immediate Analysis ◽  
Old Trees ◽  
Volumetric Yield

Este trabalho teve como objetivo caracterizar energeticamente a madeira e o carvão vegetal obtidos a partir da espécie Eucalyptus benthamii Maiden & Cambage para duas diferentes idades, 5 e 13 anos. Para a madeira de cada idade, foram confeccionados 48 corpos de prova, com aproximadamente 2 x 2 x 2 cm, que foram utilizados para determinação da massa específica, poder calorífico superior, análise química imediata e carbonização. Após a carbonização, as propriedades energéticas do carvão vegetal foram avaliadas a partir da massa específica aparente, rendimento gravimétrico e volumétrico, poder calorífico superior e análise química imediata. Tanto para a madeira quanto para o carvão vegetal houve influência da idade. A madeira com 13 anos apresentou maior massa específica básica e maior poder calorífico. Porém as diferenças nas propriedades físicas e energéticas da madeira das duas idades não justificam a manutenção da floresta até os 13 anos de idade, quando seu uso final é a geração de energia na forma de carvão. Em relação ao carvão, aquele produzido com madeira de 13 anos apresentou maior rendimento, enquanto o carvão vegetal de 5 anos apresentou melhor qualidade final para uso energético.Palavras-chave: Energia de biomassa; propriedades energéticas; eucalipto. AbstractDetermination of energetic properties of wood and charcoal produced from Eucalyptus benthamii. This research aimed to characterize the energetic properties of wood and charcoal obtained from Eucalyptus benthamii for two different ages, 5 and 13 years. For each timber age, we prepared 48 specimens, approximately 2 x 2 x 2 cm, used to determine specific gravity, calorific value, immediate analysis and carbonization. After carbonization, we evaluated the energetic properties of the charcoal in relation to density, gravimetric and volumetric yield, calorific value and immediate chemical analysis. As the wood as charcoal were influenced by age. The 13 years old timber revealed higher specific gravity and higher calorific value. However, the differences in the physical and energetic properties of the wood of the two ages do not justify maintaining the forest until the age of 13, as its end use is generation of energy as coal. The charcoal produced from 13 years old trees had the highest yield, while the charcoal from 5 years old trees had better quality to energy usage.Keywords: Biomass energy; energy properties; Eucalyptus.

I. Whiteite, a new species, and a proposed nomenclature for the jahnsite-whiteite complex series. II. New data on xanthoxenite. III. Salmonsite discredited

1978 ◽  
Vol 42 (323) ◽  
pp. 309-323 ◽  
Author(s):  
Paul Brian Moore ◽  
Jun Ito
Keyword(s):  
New Species ◽  
Chemical Analysis ◽  
Specific Gravity ◽  
Yukon Territory ◽  
Breakdown Product ◽  
Pure Material ◽  
Fine Grained ◽  
Intimate Mixture ◽  
Species Type ◽  
A New Species

SummaryWhiteite, Ca(Fe,Mn)2+Mg2Al2(OH)2 (H2O)8[PO4]4, a 14·90(4) Å, b 6·98(2) Å, c 10·13(2) Å, β 113° 07(10)′, Z = 2, space group P2/a, α 1·580(5), β 1·585(5), γ 1·590(5), 2V 40–50°, specific gravity 2·58, is a new species from the Ilha de Taquaral, Minas Gerais, Brazil. It is the Al3+-analogue of jahnsite. The mineral occurs as up to 5 mm tan crystals flattened on {001}. Twinning by reflection on {001} leads to pseudoorthorhombic development. Rather pure material also occurs from Blow River, Yukon Territory, Canada.For the general formula XM(1)M(2)2M(3)2(OH)2 (H2O)8[PO4]4, it is proposed that for M(3), Al3+ > Fe3+, the established members of the series are whiteite—(CaFe2+Mg) and whiteite—(Mn2+Fe2+Mg); and for Fe3+ > Al3+, jahnsite—(CaMn2+Mg), jahnsite—(CaMn2+Fe2+), and possibly jahnsite—(Mn2+Mn2+Mn2+).Xanthoxenite of Laubmann and Steinmetz (1920) is probably stewartite (in part) on the basis of morphological, optical, physical, and paragenetic evidence. The xanthoxenite of Frondel (1949) is proposed as the species type. It is triclinic, P or P1, a 6·70(4) Å, b8·85(4) Å, c 6·54(3) Å, α 92·1(2)°, β 110·2(2)°, γ 93·2(2)°, Z = 1 for composition .Salmonsite, c. from Pala, California, is shown to be an intimate mixture of hureaulite and jahnsite on the basis of calculated and observed powder patterns and on reinterpretation of the original chemical analysis published by Schaller (1912). It is a breakdown product resulting from oxidation of Fe2+ in the original hureaulite (‘palaite’) along with further aquation followed by fine-grained recrystallization. The reaction proposed is:

scholarly journals Deposition of barium sulphate as a cementing material of sandstone

1899 ◽  
Vol 64 (402-411) ◽  
pp. 374-377
Keyword(s):  
Chemical Analysis ◽  
Specific Gravity ◽  
Barium Sulphate ◽  
High Specific Gravity ◽  
Microscopical Examination ◽  
Large Area ◽  
Cementing Material

Some years ago I described the occurrence of a peculiar sandstone over a large area in Bramcote and Stapleford, near Nottingham. The sandstone was remarkable for its high specific gravity, and chemical analysis, supported by microscopical examination, proved that the high specific gravity was due to the existence in the sandstone of a large proportion of highly crystalline barium sulphate.

scholarly journals Sorensenite, a new sodium-beryllium-tin-silicate from the Ilímaussaq intrusion, South Greenland

1965 ◽  
Vol 61 ◽  
pp. 1-19
Author(s):  
E.I Semenov ◽  
V.I Gerassimovsky ◽  
N.V Maksimova ◽  
S Andersen ◽  
O.V Petersen
Keyword(s):  
Chemical Analysis ◽  
Specific Gravity ◽  
New Mineral ◽  
Space Group ◽  
Tin Silicate

The new mineral sorensenite (Na4SnBe2Si6O16(OH) 4) occurs in groups of prisms attaining diameters of several centimetres. The mineral is transparent or semitransparent, colourless, brown or pink. The crystals are monoclinic, a0 = 18.58, b0 = 7.45 and C0 = 12.05, β = 98°09'. Space group C62h – I 2/a, C4s - Ia.There are two distinct cleavages. The specific gravity is 2.9, the hardness 5-5.5. The mineral sometimes forms flat pseudohexagonal triplets with the normal to in (100) as twin axes.The mineral is biaxial negative, 2Vα ( = small to 75°, nα ( = 1.576-1.579, nβ = 1.581- 1.585 and nγ = 1.584 - 1.586. The chemical analysis (by M.E. Kazakova):SiO2 49.73, SnO2 20.07, Nb2O5 0.75, Fe2O3 0.04, BeO 8.02, Na2O 15.95, K2O 0.34, H2O 5.24; total 100.14 corresponds to the formula: Na4SnBe2Si6O16(OH)4.The mineral occurs in analcime-rich bodies in nepheline-sodalite-syenites of the llímaussaq massif, South Greenland. It is abundant in a few localities. Sorensenite is named after professor Henning Sørensen, Copenhagen, who directs the investigations in the Ilímaussaq region.

Bravoite from Mill Close mine, Derbyshire

1940 ◽  
Vol 25 (170) ◽  
pp. 609-614 ◽  
Author(s):  
F. A Bannister ◽  
M. H. Hey
Keyword(s):  
Chemical Analysis ◽  
Specific Gravity ◽  
Small Sample ◽  
Unit Cell ◽  
Small Specimen ◽  
British Isles ◽  
Accessory Minerals ◽  
Cell Edge ◽  
X Ray ◽  
Preliminary Work

Early this year Mr. Arthur Russell brought me a small specimen of ore from Mill Close mine, Wensley, Derbyshire, for identification. An X-ray powder photograph p1. xxviii, fig. 3, showed that the mineral has the pyrite structure with unit-cell edge a 5.49 Å., and a chemical analysis of a small sample of specific gravity 4·82, yielded Ni 16·69, Fe 29·30, S 53.40% (see table 1). These data identified the specimen as bravoite, a rare mineral new to the British Isles. At a later date Professor W. G. Fearnsides interested himself in our preliminary work and kindly provided me with further specimens of bravoite and accessory minerals from the Mill Close mine. These also have been investigated.

Fergusonite from Ceylon

1893 ◽  
Vol 10 (47) ◽  
pp. 234-238 ◽  
Author(s):  
G. T. Prior
Keyword(s):  
Chemical Composition ◽  
Chemical Analysis ◽  
Specific Gravity ◽  
New Mineral

In the appendix to the paper on the new mineral, baddeleyite, in the last number of the Magazine, Mr. Fletcher proves the identity of that mineral with the brazilite of Husssk, and explains the deviation in specific gravity and the original incorrect determination of the chemical composition of the Brazilian mineral by the supposition that the crystallographic measurements were made on the true mineral, while the specific gravity determination and chemical analysis were made on another, a tantalo-niobate of yttrium associated with it.

Prediction of the body composition of lambs from the composition of their non-carcass components

1995 ◽  
Vol 61 (2) ◽  
pp. 265-268 ◽  
Author(s):  
R. G. Wilkinson ◽  
J. F. D. Greenhalgh
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Chemical Composition ◽  
Chemical Analysis ◽  
Specific Gravity ◽  
Crude Protein ◽  
Energy Content ◽  
The Body ◽  
Viable Alternative ◽  
Whole Body

AbstractInformation on the chemical composition of Suffolk × Blackface lambs was collected and used to predict empty body (EB) component weights from empty body weight (EBW) and non-carcass (NC) component weights. EBW accounted proportionately for 0·94, 0·89 and 0·95 of the variation in EB crude protein, fat and energy content. A combination of NC component weights accounted proportionately for 0·94, 0·95 and 0·96 of the variation in EB crude protein, fat and energy content. EBW and a combination of NC component weights together accounted proportionately for 0·97, 0·97 and 0·98 of the variation in EB crude protein, fat and energy content. Chemical analysis of NC components is cheaper and easier than whole body analysis and provides a viable alternative to sample joint or specific gravity analysis.

Rb–Sr and U–Pb dating of bentonites

1983 ◽  
Vol 20 (8) ◽  
pp. 1282-1290 ◽  
Author(s):  
H. Baadsgaard ◽  
J. F. Lerbekmo
Keyword(s):  
Chemical Analysis ◽  
Specific Gravity ◽  
Systematic Variation ◽  
Purification Procedure ◽  
Natural Sample ◽  
X Ray Diffraction ◽  
X Ray ◽  
Alteration Process ◽  
Concordia Diagram

A 6 in. (15 cm) bentonite in the Z coal (Cretaceous–Tertiary boundary) in eastern Montana was sampled at four different places, and biotite, sanidine, and zircon were separated from the clay. U–Pb analyses of purified zircons yielded small systematic variations from concordant U–Pb dates. Plotting the data on a concordia diagram, a short linear discordia line intersects the concordia at [Formula: see text] with an MSWD of 1.16. The systematic variation of the four sets of zircon U–Pb data on the concordia plot may be an artifact of the sampling and purification procedure, or could result from natural sample variation from minor contamination. Biotite fractions of varying specific gravity were obtained for each of the four Z coal bentonite samples and (together with the matching purified sanidine fraction) were analysed for Rb–Sr dating. Excluding those lighter biotite fractions found to have lost 30% or more of their original Rb, an isochron was obtained giving an age of 63.7 ± 0.3 Ma with an initial 87Sr/86Sr ratio of 0.7061 ± 1 and an MSWD of 1.07.To investigate further the Rb–Sr variations in altered bentonite biotite, a large biotite sample from the Ordovician Kinnekulle A1 bentonite of southwestern Sweden was separated into 11 fractions of decreasing specific gravity. Rb–Sr analysis of these fractions also showed a departure from a linear isochron when more than about 30% of the original Rb had been lost. Chemical analysis and X-ray diffraction revealed the biotite-alteration process to be vermiculitization, but gave no definite reason why biotites that retain more than 70% of their original Rb give usable Rb–Sr data. Though some of the alteration may have taken place when the bentonite was deposited as an ash, most of the alteration probably occurred in recent times. The Kinnekulle A1 bentonite Rb–Sr isochron for biotite and sanidine gives an age of 447 ± 1 Ma with an initial 87Sr/86Sr ratio of 0.7094 ± 0.0003 and an MSWD of 3.7.

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