scholarly journals The Effects of Calcination on Mineral Composition and Physical Properties of Limestones and Oyster Shells Derived from Different Sources

2021 ◽  
Vol 11 (4) ◽  
pp. 578-586
Author(s):  
Khalil . ◽  
Ridho Kurniawan Rusli ◽  
Andri .
Keyword(s):  
Physical Properties ◽  
Mineral Composition ◽  
Fine Particles ◽  
Oyster Shell ◽  
Angle Of Repose ◽  
Chemical Compositions ◽  
Mineral Concentration ◽  
Tapped Density ◽  
Different Sources ◽  
Decomposition Properties

Limestones and oyster shells are normally used in raw or roasted meal form in the livestock diet. Calcination is intended to improve the mineral concentration and physical characteristics of limestones and oyster shells which vary based on different chemical compositions, textures, and impurities of their types and habitats. The present research aimed to study the effects of calcination on mineral composition and the physical properties of limestones and oyster derived from various sources. Limestone samples from three local limestone mining and oyster shell samples from three shellfish species were calcined by burning at a temperature of 800-1000°C. The calcined products were analyzed for mineral content (Ca, P, Mg, Cu, Zn, and Mn), physical properties (bulk density, tapped density, specific density, and angle of repose), and particle size. Results indicated that calcination had no significant effect on Ca and P concentrations but reduced micro mineral concentration. Limestones had a higher Mg concentration than that of oyster shells, and calcination increased Mg concentration. Calcined oyster shells had higher densities, percentages of fine particles, and lower angles of response. The results suggested that the type of limestones and oyster shells could determine their thermal decomposition properties.

Phosphorus minerals in tonstein; coal seam 405 at Sośnica-Makoszowy coal mine, Upper Silesia, southern Poland

2013 ◽  
Vol 63 (2) ◽  
pp. 271-281 ◽  
Author(s):  
Magdalena Kokowska-Pawłowska ◽  
Jacek Nowak
Keyword(s):  
Trace Elements ◽  
Coal Seam ◽  
Mineral Composition ◽  
Coal Mine ◽  
Chemical Compositions ◽  
Coal Basin ◽  
Upper Silesia ◽  
Southern Poland ◽  
Basin Area

Abstract Kokowska-Pawłowska, M. and Nowak, J. 2013. Phosphorus minerals in tonstein; coal seam 405 at Sośnica- Makoszowy coal mine, Upper Silesia, southern Poland. Acta Geologica Polonica, 63 (2), 271-281. Warszawa. The paper presents results of research on tonstein, which constitutes an interburden in coal seam 405 at the Sośnica- Makoszowy coal mine, Makoszowy field (mining level 600 m), Upper Silesia, southern Poland. The mineral and chemical compositions of the tonstein differ from the typical compositions described earlier for tonsteins from Upper Silesia Coal Basin area. Additionally, minerals present in the tonsteins include kaolinite, quartz, kaolinitised biotite and feldspars. The presence of the phosphatic minerals apatite and goyazite has been recognized. The presence of gorceixite and crandallite is also possible. The contents of CaO (5.66 wt%) and P2O5 (6.2 wt%) are remarkably high. Analysis of selected trace elements demonstrated high contents of Sr (4937 ppm) and Ba (4300 ppm), related to the phosphatic minerals. On the basis of mineral composition the tonstein has been identified as a crystalline tonstein, transitional to a multiplied one.

ZIRCADYNE 706

Alloy Digest ◽  
1983 ◽  
Vol 32 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Exchangers ◽  
Heat Treating ◽  
Chemical Compositions ◽  
Chemical Processing ◽  
Lower Oxygen ◽  
Panel Type

Abstract ZIRCADYNE 706 is a zirconium-niobium (columbium) alloy containing 2-3% niobium. It is similar in chemical compositions (except for slightly lower oxygen) to Zircadyne 705 (Alloy Digest Zr-8, July 1982). Zircadyne 706 was developed specifically for severe forming applications such as panel-type heat exchangers. The corrosion resistance of Zircadyne 706 is identical to that of Zircadyne 705 but its tensile and yield strengths are slightly lower. It is recommended for chemical processing applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Zr-10. Producer or source: Teledyne Wah Chang Albany.

Exploration of Neem Gum, Acrylamide Grafted Neem Gum and Carboxymethylated Neem Gum as Retardant in Tablet Formulation

2020 ◽  
Vol 16 (9) ◽  
pp. 1404-1410
Author(s):  
Rishabha Malviya
Keyword(s):  
Diclofenac Sodium ◽  
Tablet Formulation ◽  
Angle Of Repose ◽  
Wet Granulation ◽  
Binding Agent ◽  
Grafted Polymer ◽  
Model Drug ◽  
Tablet Dosage ◽  
Tapped Density ◽  
Derivatives Of

Background: In the previous study, investigators have synthesized acrylamide grafted and carboxymethylated derivatives of neem gum and evaluated their potential in the formulation of nanoparticles. In continuation of previous work, authors have evaluated neem gum polysaccharide (NGP), acrylamide grafted neem gum polysaccharide (NGP-g-Am) and carboxymethylated neem gum polysaccharide (CMNGP) as binding agent in the tablet dosage form. Methods: Diclofenac sodium was used as a model drug while microcrystalline cellulose and talc were used as excipient in the preparation of granules employing wet granulation technique. NGP, NGP-g-Am and CMNGP were utilized as binding agent in the preparation of granules. Prepared granules were characterized for various pre-compression and post-compression parameters. Results and Discussion: Binding agents were used in the concentration of 4-24%w/w. NGP incorporated granules showed more bulk density and lower values of tapped density, Carr’s index, bulkiness, Hausner’s ratio and angle of repose as compared to NGP-g-Am consisting granules. NGP-g-Am consisting tablets showed more hardness and zero friability as compared to NGP based tablets. Drug content was found lower for the tablets having grafted polymer in place of NGP. CMNGP were also utilized to prepare granules but granules were not be able to compress keeping all the compacting parameters same as used in the case of NGP and NGP-g-Am consisting granules. NGP and NGP-g-Am were able to sustain drug release up to 6 and 8 h, respectively. Conclusion: It can be concluded that NGP-g-Am induces better properties when used as a binder in the tablet formulation than native polymer, while CMNGP cannot be utilized as a binding agent in the preparation of a tablet.

Radiative effects and chemical compositions of fine particles modulating urban heat island in Nanjing, China

2021 ◽  
Vol 247 ◽  
pp. 118201
Author(s):  
Hao Wu ◽  
Tijian Wang ◽  
Qin'geng Wang ◽  
Yang Cao ◽  
Yawei Qu ◽  
...  
Keyword(s):  
Urban Heat Island ◽  
Fine Particles ◽  
Chemical Compositions ◽  
Heat Island ◽  
Radiative Effects ◽  
Urban Heat

scholarly journals FORMULATION AND EVALUATION OF FLURBIPROFEN FAST DISINTEGRATING TABLETS USING NATURAL SUPERDISINTEGRANTS

2016 ◽  
Vol 9 (6) ◽  
pp. 247 ◽  
Author(s):  
Mohammed Sarfaraz ◽  
Surendra Kumar Sharma
Keyword(s):  
Drug Release ◽  
Angle Of Repose ◽  
Lepidium Sativum ◽  
Disintegration Time ◽  
Natural Sources ◽  
Weight Variation ◽  
Wetting Time ◽  
Tapped Density ◽  
Fast Disintegrating Tablets

ABSTRACTObjective: The main objective of this research was to formulate Fast disintegrating tablets of Flurbiprofen incorporating superdisintegrants, isolated from natural sources like Plantago ovata (PO) seeds, Lepidium sativum (LS) seeds and agar-agar.Methods: Superdisintegrants were isolated from their natural sources using reported methods. Swelling index and hydration capacity was determined for the natural superdisintegrants to know their disintegration capacity. The tablet formulations were designed using isolated natural superdisintegrants. The powder blends were evaluated for pre-compressional parameters like angle of repose, bulk density, tapped density, carr’s index, and hausner’s ratio. Fast disintegrating tablets were prepared by direct compression method. The compressed tablets were characterized for post compression parameters.Results: All formulations had hardness, friability, weight variation and drug content within the pharmacopoeial limits. The wetting time was 84 to 254 sec, in vitro disintegration time was between 59.2 to 221 sec, and in-vitro drug release was as low as 11.80% (LS1) to a maximum of 98.99% (PO4) after 4 min of study. Among all, optimized formulation was PO4, as it showed good wetting time (84 sec), fastest disintegration time (59.2 sec), dispersion time (135 sec) and drug release of 98.99.% within 4 min.Conclusion: Flurbiprofen FDT’s were successfully developed using isolated natural disintegrants. The natural disintegrants isolated showed promising results and can prove as effective alternative for synthetic disintegrants.

scholarly journals Influence of boron on growth and mineral composition of bean (Phaseolus vulgaris L.)

1981 ◽  
Vol 38 (1) ◽  
pp. 309-318
Author(s):  
I. P. Oliveira ◽  
E. Malavolta
Keyword(s):  
Phaseolus Vulgaris ◽  
Mineral Composition ◽  
Nutrient Solution ◽  
Boron Concentration ◽  
Dry Weight ◽  
Phaseolus Vulgaris L ◽  
Mineral Concentration ◽  
Affected Plant ◽  
Differential Behaviour ◽  
Total Dry Weight

Nine cultivars of Phaseolus vulgaris L. were grown in nutrient solution to study the effect of boron on growth and mineral composition. Data obtained in thie study allowed for the following conclusions: (1) high levels of boron affected plant height, root length, dry weight of tops, dry weight of root, and total dry weight; (2) regression analysis was used to point out differential behaviour among cultivars in relation to boron concentration in nutrient solution; (3) the best mineral concentration in the plant tissue was obtained with application of 0,5 ppm of boron in the nutrient solution.

scholarly journals Engineering Properties of Peeled and Unpeeled Multiplier Onion

2020 ◽  
Vol 8 (3) ◽  
pp. 232-238
Author(s):  
Dawn C.P. Ambrose
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Coefficient Of Friction ◽  
Angle Of Repose ◽  
Engineering Properties ◽  
True Density ◽  
Crushing Strength ◽  
Frictional Properties ◽  
Allium Cepa L ◽  
Multiplier Onion

Multiplier onion (Allium cepa L. var aggregatum. Don.) is mainly used for its unique flavour in seasoning dishes. The unpeeled onions are processed at farm level by means of primary processing and by secondary processing various products like paste, flakes, powder could be produced from peeled onions. For the design of processing and handling equipment knowledge of engineering properties is essential. The engineering properties of peeled and unpeeled multiplier onion were determined. The average values of the physical properties of unpeeled onion were recorded for bulk density and true density as 636.621 and 1526.825 kg/m3 respectively. Similarly for peeled onions, the bulk and true density were 627.03 and 1108.74 kg/m3 respectively. The moisture present in peeled and unpeeled onion was 77.66 % and 74.43% (w.b) respectively. The TSS of multiplier onion was found to be 20° Brix for both peeled and unpeeled samples. The colour values were also measured using colour flex meter for the peeled and unpeeled onions. The frictional properties including coefficient of friction, filling and emptying angle of repose were also measured. Mechanical properties were determined by using a texture analyser. The firmness was measured in terms of penetrating force and crushing strength which were recorded to be 8.59 N and 124.93 N respectively for peeled and 12.00 N and 138.35 N respectively for unpeeled onions.

scholarly journals Hydrocarbon Distribution Pattern in the Upper Ordovician Carbonate Reservoirs and its Main Controlling Factors in the West Part of Northern Slope of Central Tarim Basin, NW China

2012 ◽  
Vol 30 (5) ◽  
pp. 775-792 ◽  
Author(s):  
Xiuxiang Lü ◽  
Jianfa Han ◽  
Xiang Wang ◽  
Weiwei Jiao ◽  
Hongfeng Yu ◽  
...  
Keyword(s):  
Physical Properties ◽  
Distribution Pattern ◽  
Tarim Basin ◽  
Oil And Gas ◽  
Petroleum Exploration ◽  
Chemical Compositions ◽  
Northern Slope ◽  
Upper Ordovician ◽  
The West ◽  
West Part

The northern slope of Tazhong palaeo-uplift has become a key target field for petroleum exploration in Tarim Basin. A major breakthrough is made in the Upper Ordovician oil and gas exploration in the west part of northern slope. Oil and gas near the Tazhong I slope-break zone occurred in Liang2 section was dominated by condensate gas reservoir, while oil reservoir was mainly inward distributed in Liang3 section. The crude oils in this region in physical properties characterized by low density, low viscosity, low freezing point, low sulfur content, medium wax content. And the natural gas in chemical components was featured by low-medium nitrogen content, low-medium carbon dioxide content and medium-high hydrogen sulfide content. In the plane direction, oil and gas exhibited a “oil in the interior, gas in the exterior” distribution pattern, and mainly located in a depth range of 0∼60 m below the top of the Liang3 section in the longitudinal direction. The distribution patterns displayed in physical properties and chemical compositions of oil and gas are controlled by multiple influencing factors. The results of above comprehensive studies suggested that vertical overriding of reef-bank-type reservoirs in Liang2 section and karst reservoirs in Liang3 section provided superior reservoir conditions; faults and fractures not only formed reservoir space and improved reservoir quality, also promoted the development of karst reservoirs and provided good migration pathway for hydrocarbon accumulation; one of the nonnegligible factors leading to this kind of distribution pattern for the Upper Ordovician oil and gas reservoirs is shale content in the compact carbonate formation; multi-sources and multi-stages of hydrocarbon filling are absolutely necessary controlling factor for this kind of distribution pattern in the whole block.

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