Droplet microfluidics in (bio)chemical analysis

This paper focuses on the production technology of late nineteenth-century tiles from the Ettehadieh House Complex in Tehran, Iran. It makes use of the opportunity to provide for the first time the results of chemical and microstructural analyses of late nineteenth-century tiles selected directly from context and with known provenance. The paper integrates the results of chemical study of the Ettehadieh tiles with other available technological information on nineteenth-century Persian tiles, including chemical analyses of signed tiles and samples of pigments, as well as the study of the treatise of a certain Persian potter, ‘Ali Mohammad Isfahani, to suggest processes of materials procurement and manufacture. These processes are used as evidence to discuss trade and technological interactions between Iran and Europe in the nineteenth century.

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The petrology and chemical composition of a tholeiite sill on Schaapkraal 68JT, Lydenburg District, Transvaal, South Africa

Mineralogical Magazine ◽

10.1180/minmag.1970.037.292.06 ◽

1970 ◽

Vol 37 (292) ◽

pp. 909-915

Author(s):

C. Frick

Keyword(s):

South Africa ◽

High Pressure ◽

Chemical Composition ◽

Chemical Analysis ◽

Chemical Data ◽

Chemical Analyses ◽

Residual Glass ◽

Iron Enrichment ◽

Crystallization Differentiation

SummaryA glass-bearing dolerite, which consists of orthopyroxene phenocrysts (γ 1·689, α 1·678, β 1·680, 2Vα 81°, S.G. 3·35) and a glassy mesostasis (n 1·568, S.G. 3·25), is described petrologically. Three new chemical analyses are given. From the petrological and chemical data it can be concluded that the orthopyroxene formed under intratelluric conditions and probably under high pressure. According to the recalculated chemical analysis of the orthopyroxene 0·22 Al3+ is in the Y position and much less Al3+ in the Z position. The chemical analysis of the residual glass is compared with similar residual glasses, and it shows that iron enrichment characterizes the earlier stages of crystallization differentiation, whereas the later stages are marked by an increase in Si4+, K+, and Na+.

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Modal and Chemical Analyses in Regional Studies

Geological Magazine ◽

10.1017/s0016756800065602 ◽

1953 ◽

Vol 90 (5) ◽

pp. 337-344 ◽

Cited By ~ 6

Author(s):

E. H. Timothy Whitten

Keyword(s):

Chemical Analysis ◽

Regional Studies ◽

Chemical Analyses ◽

Chemical Variability

AbstractA technique for roughly evaluating the chemical variability within a suite of rocks is described and discussed in relation to the composition of the granite and quartzite of N. W. Donegal. The accuracy of this method is compared with more expensive chemical analysis.

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Chemical analyses of flowers and leaves for nutritional diagnoses of coffee trees

Ciência Rural ◽

10.1590/0103-8478cr20190796 ◽

2021 ◽

Vol 51 (7) ◽

Author(s):

André Vinicius Zabini ◽

Herminia Emilia Prieto Martinez ◽

Júlio César Lima Neves ◽

Cosme Damião Cruz ◽

Samuel Vasconcelos Valadares

Keyword(s):

Chemical Analysis ◽

Mineral Composition ◽

Reference Values ◽

Nutrient Content ◽

Tissue Analysis ◽

Chemical Analyses ◽

Leaf Analysis ◽

Commercial Farms ◽

Flower Tissue ◽

Content Range

ABSTRACT: The chemical analysis of flowers has been studied for some crops. In coffee trees, the flower tissue analysis could anticipate the nutritional diagnosis. This study aimed to: (i) compare the mineral composition of coffee flowers and leaves; and to (ii) generate reference values for nutritional diagnosis of coffee trees, based on flower and leaf analysis. Nutrient content of flowers and leaves and coffee productivity were evaluated in 26 commercial farms located in Manhuaçu, MG, Brazil throughout three years. The critical nutrient content range in flowers are respectively: 2.78 - 3.17, 0.23 - 0.28, 2.80 - 3.12, 0.30 - 0.37, 0.24 - 0.30, 0.15 - 0.18 dag kg-1 of N, P, K, Ca, Mg, and S; and 17 - 21, 12 - 18, 52 - 80, 26 - 43, and 28 - 48 mg kg-1 of Zn, Cu, Mn, Fe, and B. For leaves, the critical nutrient ranges are respectively: 2.63 - 2.86, 0.13 - 0.14, 2.13 - 2.33, 1.04 - 1.22, 0.27 - 0.33, 0.15 - 0.18 dag kg-1 of N, P, K, Ca, Mg, and S; and 9 - 14, 15 - 23, 80 - 115, 99 - 148, and 31 - 37 mg kg-1 of Zn, Cu, Mn, Fe, and B. The nutritional diagnosis of coffee trees for N, P, Ca, Fe, Cu, and Mn can be anticipated using flower analysis.

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Petrografia dos mármores de Caçapava do Sul, RS

Ciência e Natura ◽

10.5902/2179460x25458 ◽

1987 ◽

Vol 9 (9) ◽

pp. 37 ◽

Cited By ~ 2

Author(s):

Olavo José Bortolotto

Keyword(s):

Chemical Analysis ◽

Rio Grande ◽

Final Conclusion ◽

Chemical Analyses ◽

Rio Grande Do Sul ◽

Rock Body ◽

X Ray ◽

Rock Bands ◽

Staining Techniques ◽

Granitic Batholith

The Caçapava do Sul region, State of Rio Grande do Sul, is characterized by the occurrence of a granitic batholith (Caçapava Granite), that has an outcrop of about 25 by 10 km, oriented North- South. The Caçapava Granite is surrounded by a belt of metamorphites belonging to the Porongos Group, assigned to Upper Precanbrian by RIBEIRO et alii: (1966). Among the metamorphites occur a carbonatic rock body, lens shaped, with clear contacts, interpenetrated by granitic apophises and with an outcrop of about 17 km2. Samples of this rock body were studied by microscopic, difratometry and spectrometry of X ray, electronic microprobe and chemical analyses aiming at identifying and characterizing the carbonatic and silicatic minerals. Through staining techniques it was possible to distinguish dolomite (Do), calcite (Cc) and ferriferous calcite (Ccf). The modal and chemical analysis showed that the carbonatic minerals were more abundant than the silicatic ones being these last ones restricted to of the rock bands. The detected silicatic minerals were the following: talc, tremolite, diopside, forsterite, chlorite and phlogopite. In smaller amounts titanite, apatite and quartz also occur. Serpentine resulting from alterations in the olivine is also very common. The final conclusion with these studies, about the carbonatic rocks, indicate that they are contact impure dolomitic marbles.

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The Beneficiation Processes of Low-Grade Sedimentary Phosphates of Tozeur-Nefta Deposit (Gafsa-Metlaoui Basin: South of Tunisia)

Minerals ◽

10.3390/min9010002 ◽

2018 ◽

Vol 9 (1) ◽

pp. 2 ◽

Cited By ~ 4

Author(s):

Haïfa Boujlel ◽

Ghassen Daldoul ◽

Haïfa Tlil ◽

Radhia Souissi ◽

Noureddine Chebbi ◽

...

Keyword(s):

Chemical Analysis ◽

Microscopic Observation ◽

Recovery Rate ◽

Coarse Fraction ◽

Low Grade ◽

Reverse Flotation ◽

Chemical Analyses ◽

Phosphate Ore ◽

Carbonate Fluorapatite

The enrichment of the low-grade-phosphate ore of the Tozeur-Nefta deposit was investigated using scrubbing-attrition, ball grinding and anionic/cationic reverse flotation in order to separate phosphate-rich particles from their gangue. The choice of the beneficiation process was based on the petrographic, mineralogical and chemical analyses. The petrographic and mineralogical studies have revealed the abundance of phosphatic (carbonate-fluorapatite-CFA) particles) coupled with carbonates (calcite, dolomite,) and silicates (quartz, illite, kaolonite) that constitute the (endo/exo) gangue of these ores. Chemical analysis has demonstrated that the raw phosphate sample contains low amounts of P2O5 (12.0%) and MgO (4.9%) and high amounts of CaO (40.7%) and SiO2 (20.5%). Microscopic observation/counting has shown that the release mesh occurs in the 71–315 μm size. Scrubbing-attrition, grinding and reverse flotation methods were applied to the +71μm fraction. Scrubbing-attrition tests of the 71–315 μm fraction have helped to improve the P2O5 grade to 15.5%. Ball-grinding tests were used to reduce the coarse fraction +315 μm. Grounded materials were sieved to 71–315 μm and combined with the scrubbed fraction in the flotation feed. Reverse-flotation tests of the phosphate-rich fraction (71–315 μm) have helped to improve the P2O5 grade to 27.1%, with a recovery rate of 92.4%.

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STUDIES ON MYCOBACTERIA: I. CYTOCHEMICAL STUDY AND CHEMICAL ANALYSIS OF THE LIPIDS OF MYCOBACTERIUM MARIANUM

Canadian Journal of Microbiology ◽

10.1139/m56-082 ◽

1956 ◽

Vol 2 (7) ◽

pp. 685-701 ◽

Cited By ~ 1

Author(s):

Soeur Marie Suzanne ◽

V. Portelance ◽

M. Panisset

Keyword(s):

Chemical Composition ◽

Chemical Analysis ◽

Culture Media ◽

Tubercle Bacillus ◽

Chemical Analyses ◽

Cytochemical Study ◽

Working Hypothesis ◽

Sudan Black B ◽

Lipid Fractions

Several authors have reported that the composition of the lipids of the tubercle bacillus varies with the type and composition of the culture media. Major differences may therefore exist between the bacillary lipids of bacilli growing on culture media and those of such microorganisms parasitizing a host.The present paper deals with the cytochemical and chemical analyses of Mycobacterium marianum, which is, to our knowledge, the first strain of Mycobacterium to be stained by the Sudan black B method when grown on Sauton's medium. Details on the isolation and fractionation of several lipid fractions of Mycobacterium marianum are presented together with some of their properties. The results are discussed in relation to our working hypothesis that the chemical composition of Mycobacterium marianum grown under our conditions may resemble more closely that of bacilli growing in vivo than do most cultured mycobacteria.

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Laser remote chemical analyses (Chemical analysis series, vol. 94)

Analytica Chimica Acta ◽

10.1016/s0003-2670(00)81919-4 ◽

1989 ◽

Vol 222 (1) ◽

pp. 394-396

Author(s):

R.M. Measures ◽

J.F. Alder

Keyword(s):

Chemical Analysis ◽

Chemical Analyses

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Defining function in Neolithic ceramics: the example of Makriyalos, Greece

Documenta Praehistorica ◽

10.4312/dp.29.9 ◽

2002 ◽

Vol 29 ◽

pp. 109-118 ◽

Cited By ~ 3

Author(s):

Dushka Urem-Kotsou ◽

Kostas Kotsakis ◽

Ben Stern

Keyword(s):

Chemical Analysis ◽

Analysis Data ◽

Chemical Analyses ◽

Crucial Importance ◽

Late Neolithic ◽

Northern Greece ◽

Archaeological Ceramics ◽

Organic Remains ◽

Neolithic Pottery

Recent development in chemical analyses of organic remains in archaeological ceramics gives new possibilities to the study of pottery use. They could be of crucial importance in assessing vessel’s use, especially when combined with contextual, technomorphological and use-alteration analysis data. Using the example of the late Neolithic pottery from Makriyalos, Northern Greece, we discuss some of the problems in determining the use of the vessels from archaeological context, and show the benefits of integrating chemical analysis of organic remains in approaching this issue.

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Metallurgy and Ancient Coins: A Multidisciplinary Research

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.792.645 ◽

2015 ◽

Vol 792 ◽

pp. 645-649 ◽

Cited By ~ 1

Author(s):

Irene Calliari ◽

Marco Breda ◽

Caterina Canovaro

Keyword(s):

Chemical Analysis ◽

Social Economic ◽

Chemical Analyses ◽

Multidisciplinary Research ◽

Metallurgical Investigation ◽

History Of ◽

Technological History

Coins are widely studied in archaeometry because they provide a lot of information on social, economic and technological history of people and territories which they are related to. A lot of chemical analyses have been performed by different methods, but only a few of metallographic data are known. The combination of chemical analysis with metallurgical investigation results in a complete description of the coin and its production steps. This paper reports a summary of the results on the Cu base coinage in Italy (Roman and Byzantine Empires) with the aim to develop a protocol of investigation based on microstructural and chemical analysis in order to reinforce the numismatic classification.

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