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Artykuły w czasopismach na temat „Mineralisation”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Currey, J. D. "The design of mineralised hard tissues for their mechanical functions." Journal of Experimental Biology 202, no. 23 (1999): 3285–94. http://dx.doi.org/10.1242/jeb.202.23.3285.

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Most hard tissues have as their primary purpose to be stiff. Outside the arthropods, mineralisation of a soft organic matrix is the almost universal method of producing high stiffness. However, stiffening brings with it the undesirable mechanical result of brittleness (lack of toughness). The mineralisation of some tissues, such as bone and dentine, can be modified rather easily, in evolutionary terms, to produce the optimum mix of stiffness with bending strength (which, except at the highest mineralisations, go together) on one hand and toughness on the other hand. However, in most other tiss

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Roberts, Fiona, Greg Markby, Scott Dillon, Colin Farquharson, and Vicky E. MacRae. "Beyond mineralisation: metabolic functions for matrix mineralisation regulators." Journal of Endocrinology 245, no. 2 (2020): R11—R22. http://dx.doi.org/10.1530/joe-19-0460.

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The physiological mineralisation of skeletal tissues, as well as the pathological mineralisation of soft tissues involves a fine balance between regulators that either promote or inhibit the process. In recent years, several studies have advocated a non-skeletal role for some of these mineralisation regulators in a range of human diseases, including diabetes, cardiovascular disease, obesity and neurodegenerative disease. This is an emerging area of interest and the functional roles and mechanisms of action of these various endocrine factors, phosphatases and phosphodiesterase’s in important pa

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Sierra, J. "Nitrogen mineralisation and its error of estimation under field conditions related to the light-fraction soil organic matter." Soil Research 34, no. 5 (1996): 755. http://dx.doi.org/10.1071/sr9960755.

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In situ, incubations of intact soil cores were carried out to identify factors controlling nitrogen (N) mineralisation and its spatial variability under field conditions. The analysed factors were soil moisture, temperature, and the content of light-fraction (density ≤ 2 Mg/m3) organic carbon (LC) contained in the soil. The error associated with the estimate of in situ N mineralisation was analysed using undisturbed samples in laboratory incubations. The coefficient of variation of in situ N mineralisation ranged from 58 to 234%. Nitrogen and LC mineralisation in the field showed a similar tem

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4

Bianchini Jr., I., RH Silva, MB Cunha-Santino, and RS Panhota. "Aerobic and anaerobic decomposition of Pistia stratiotes leachates from a tropical eutrophic reservoir (Barra Bonita, SP, Brazil)." Brazilian Journal of Biology 70, no. 3 (2010): 559–68. http://dx.doi.org/10.1590/s1519-69842010000300012.

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The present study discussed the kinetic aspects of leachate decomposition from an aquatic macrophyte, Pistia stratiotes L (water lettuce). This species was collected from Barra Bonita Reservoir located in the State of São Paulo (Brazil). Decomposition chambers were prepared with high molecular weight (HMW), low molecular weight (LMW) and integral (INT = HMW + LMW) dissolved organic matter (DOM) diluted with reservoir water. The samples were incubated at 20 °C, in darkness and under aerobic or anaerobic conditions. For 79 days, the concentrations of dissolved oxygen (DO) and organic carbon (OC)

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Padhi, Ajoy Kumar, Mrinal Kanti Mukherjee, Brajesh Kumar Tripathi, Dheeraj Pande, Balbir Singh Bisht, and Bhabesh Chandra Sarkar. "Polymetallic Uranium Mineralisation in Rohil, Rajasthan, Western India: Insights from Mode of Occurrences, Structural Controls, Alteration Geochemistry and Exploration." Minerals 13, no. 4 (2023): 555. http://dx.doi.org/10.3390/min13040555.

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Geological and radiometric studies of outcrops aided by extensive subsurface exploration through drill holes in an otherwise soil-covered terrain revealed the existence of low grades, medium tonnage, and metasomatite types of polymetallic uranium deposits at Rohil in India. Microscopic studies, electronprobe micro analyses, and geochemical analyses of samples from lodes indicate the polymetallic nature of mineralisation involving copper and molybdenum, in addition to uranium. Wide variations in the composition of fluid (S-, F-, P-, and O-rich) led to the formation of sulphides, fluorite, U-pho

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Stenger, R., G. F. Barkle, and C. P. Burgess. "Mineralisation of organic matter in intact versus sieved/refilled soil cores." Soil Research 40, no. 1 (2002): 149. http://dx.doi.org/10.1071/sr01003.

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In a 6-month laboratory incubation study, we compared the net C and N mineralisation of the soil organic matter (SOM) of 3 pasture soils and the mineralisation of glucose-C in intact versus sieved&sol;refilled soil cores. The main questions were whether the net C and N mineralisation differed between intact and sieved&sol;refilled soil cores after a conditioning period of 4 weeks, and how much the C and N mineralisation of SOM differed among the similarly managed pasture soils. Apart from the net nitrogen mineralisation in one soil, there were no significant differences in cumulated mi

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Brackin, Richard, Scott Buckley, Rhys Pirie, and Francois Visser. "Predicting nitrogen mineralisation in Australian irrigated cotton cropping systems." Soil Research 57, no. 3 (2019): 247. http://dx.doi.org/10.1071/sr18207.

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Cotton cropping systems in Australia have poor nitrogen (N) use efficiency, largely due to over-application of N fertiliser. The N mineralisation from soil organic N reserves is often overlooked, or underestimated despite recent studies indicating that it may contribute the majority of N exported with the crop. Predicting N mineralisation is a major challenge for agricultural industries worldwide, as direct measurements are time-consuming and expensive, but there is considerable debate as to the most reliable methods for indirect estimation. Additionally, laboratory incubations assess potentia

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8

Parfitt, R. L., and G. J. Salt. "Carbon and nitrogen mineralisation in sand, silt, and clay fractions of soils under maize and pasture." Soil Research 39, no. 2 (2001): 361. http://dx.doi.org/10.1071/sr00028.

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Although several studies have quantified either C mineralisation or net N mineralisation in particle-size fractions, no work has examined simultaneous C and net N mineralisation. Therefore, we conducted an 18-week laboratory incubation to compare simultaneous mineralisation in sand, silt, and clay fractions. The soils (silt loams) were collected from fields of long-term pasture and maize. Sand, silt, and clay were separated by mild dispersion in water followed by centrifugation. Samples were incubated at 25°C in the dark in a quartz matrix, and were leached every 2 weeks with 0.004 M CaCl 2 at

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9

Franzmann, P. D., L. R. Zappia, B. M. Patterson, J. L. Rayner, and G. B. Davis. "Mineralisation of low concentrations of organic compounds and microbial biomass in surface and vadose zone soils from the Swan Coastal Plain, Western Australia." Soil Research 36, no. 6 (1998): 921. http://dx.doi.org/10.1071/s97116.

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Mineralisation rates for ring-labelled 14C-atrazine, benzene, and toluene were determined for a number of Swan Coastal Plain soils which had not been previously in contact with these contaminants. Microbial biomass was estimated by phospholipid techniques in soil samples from the same sites. Mineralisation rates for the volatile aromatic hydrocarbons in the thin (up to 30 cm) surface soils (23·4-42·6 µmol/kg · day when fitted to zeroth-order rate kinetics) were appreciably faster than the mineralisation rates measured in soils collected from a depth of 1 m (0·11-3·0 µmol/kg · day). The pestici

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10

Angus, JF, M. Ohnishi, T. Horie, and RL Williams. "A preliminary study to predict net nitrogen mineralisation in a flooded rice soil using anaerobic incubation." Australian Journal of Experimental Agriculture 34, no. 7 (1994): 995. http://dx.doi.org/10.1071/ea9940995.

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Complementary field and laboratory studies were conducted to determine whether laboratory measurements of net nitrogen (N) mineralisation under anaerobic conditions could be used to predict field rates in a flooded soil and N uptake by a rice crop. The laboratory experiment consisted of measurements of ammonium accumulation at 10, 20, 30, and 40�C for 7, 14, and 28 days of anaerobic incubation. There was no accumulation of ammonium at 10�C, but increasing ammonification rate at temperatures of 20�C was observed, except for a slower rate at 40�C after 14 days. Two models were tested on the data

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11

Ouyang, Lei, Liuqian Yu, and Renduo Zhang. "Effects of amendment of different biochars on soil carbon mineralisation and sequestration." Soil Research 52, no. 1 (2014): 46. http://dx.doi.org/10.1071/sr13186.

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The aim of this study was to determine the impact of addition of different biochars on soil carbon mineralisation and sequestration. Different biochars were produced from two types of feedstock, fresh dairy manure and pine tree woodchip, each of which was pyrolysed at 300, 500, and 700°C. Each biochar was mixed at 5% (w/w) with a forest loamy soil and the mixture was incubated at 25°C for 180 days, during which soil physicochemical properties and soil carbon mineralisation were measured. Results showed that the biochar addition increased soil carbon mineralisation at the early stage (within th

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12

Sgraja, M., J. Bertling, and P. J. Jansens. "Mineralisation von Mikrokapseln." Chemie Ingenieur Technik 75, no. 8 (2003): 1114. http://dx.doi.org/10.1002/cite.200390282.

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13

Angus, J. F., T. P. Bolger, J. A. Kirkegaard, and M. B. Peoples. "Nitrogen mineralisation in relation to previous crops and pastures." Soil Research 44, no. 4 (2006): 355. http://dx.doi.org/10.1071/sr05138.

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Most of the nitrogen (N) used by Australian crops is mineralised from the residues of previous crops and pastures. Net N mineralisation was studied in 2 field experiments in southern NSW, one comparing different residue-management and tillage systems during continuous cropping and the other comparing residues of annual and perennial pastures in a pasture–crop system. After 14 years of continuous cropping, soil total N concentration had decreased by 50%. Neither stubble retention nor direct drilling affected potential N mineralisation or the decrease in total N. However, soil mineral N in the f

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14

Sadras, Victor O., and Jeffrey A. Baldock. "Influence of size of rainfall events on water-driven processes. II. Soil nitrogen mineralisation in a semi-arid environment." Australian Journal of Agricultural Research 54, no. 4 (2003): 353. http://dx.doi.org/10.1071/ar02113.

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Power laws describe the relationships between the number N (s) and the size s of daily rainfall events, i.e. N (s) ~ s–τ, with higher τ corresponding to sites or seasons with greater frequency of small rainfall events. This paper tested the hypothesis that the rate of soil nitrogen mineralisation increases with increasing exponent τ, as affected by both spatial and temporal sources of variation. Rates of nitrogen mineralisation in an uncropped sandy loam soil were calculated using a simulation model with detailed nitrogen and water balances, and long-term weather data for 6 Australian location

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15

Purnomo, Erry, A. S. Black, C. J. Smith, and M. K. Conyers. "The distribution of net nitrogen mineralisation within surface soil. 1. Field studies under a wheat crop." Soil Research 38, no. 1 (2000): 129. http://dx.doi.org/10.1071/sr99058.

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To test the hypothesis that net nitrogen (N) mineralisation is concentrated in the surface few centimetres following minimal soil disturbance for crop establishment, mineralisation was measured during the growth of wheat. The soil was a Red Kandosol located in southern New South Wales. Mineralisation was estimated usingin situ incubations inside capped PVC tubes, which were sampled every 3 weeks. Soil from the tubes was sampled at depth intervals of 2 cm to a depth of 10 cm and at 5-cm intervals from 10 to 20 cm. The results showed that net N mineralisation decreased with depth to 20 cm. Over

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16

Sharma, R. K., B. B. Sharma, Nitesh Mishra, Kapil Choudhary, and Rohit Gupta. "First Report of Associated Gold Mineralisation in the Bansiyal Area, Sikar/Jhunjhnun District, Rajasthan, India: An IOCG Earth System of Mineralisation." Journal of Geography, Environment and Earth Science International 29, no. 5 (2025): 52–60. https://doi.org/10.9734/jgeesi/2025/v29i5894.

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The Khetri Copper Belt is known for copper mineralisation in Rajasthan. The North Khetri is specifically rich in copper mineralisation while the south Khetri belt is marked with the small isolated deposits of copper with sharing nearly similar depositional and lithotectonic environment. One such location is Bansiyal in Sikar District, Rajasthan, where copper mineralisation is known from as early as 1994 and hosted within Ajabgarh metasediments of Delhi Supergroup of rocks. We report the occurrence of gold for the first time from the area to the tune of 74ppb, which is 7 times higher than the t

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D, Clarson, and Ramaswami P.P. "MINERALISATION PATTERN OF SULPHUR IN DIFFERENT SOIL TYPES." Madras Agricultural Journal 77, February (1990): 70–73. http://dx.doi.org/10.29321/maj.10.a01919.

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The rate of mineralisation of sulphur in soils is higher during the first or second week, when the favourable environmental factors such as noisture and temperature are prevailing. Addition of elemental sulphur stimulates the mineralisation process; as it gives energy to the sulphur oxidising organisms. The rate of mineralisation is lowered after two wooks, probably due to the Immobilisation of sulphur.compounds as they might be assimilated to the microbial tissue.

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Kearney, Michaela, Paul R. Cooper, Anthony J. Smith, and Henry F. Duncan. "Characterisation of miRNA Expression in Dental Pulp Cells during Epigenetically-Driven Reparative Processes." International Journal of Molecular Sciences 24, no. 10 (2023): 8631. http://dx.doi.org/10.3390/ijms24108631.

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Within regenerative endodontics, exciting opportunities exist for the development of next-generation targeted biomaterials that harness epigenetic machinery, including microRNAs (miRNAs), histone acetylation, and DNA methylation, which are used to control pulpitis and to stimulate repair. Although histone deacetylase inhibitors (HDACi) and DNA methyltransferase inhibitors (DNMTi) induce mineralisation in dental pulp cell (DPC) populations, their interaction with miRNAs during DPC mineralisation is not known. Here, small RNA sequencing and bioinformatic analysis were used to establish a miRNA e

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Isimikalu, Theophilus Olufemi, John Olajide Olaniyan, Sikiru Yusuf Alasinrin, Adesina Abudlkabir Wahab, and Ufedo Meshach Salifu. "Influence of Environmental Variables on Carbon Mineralization in Diverse Soil Management Systems Under Maize Cropping in Kwara State, Nigeria." Bulgarian Journal of Soil Science 7, no. 1 (2022): 34–48. https://doi.org/10.5281/zenodo.6780126.

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Understanding the influence of agricultural soil management practices on soil processes and the environment is vital for sustainable food production. Therefore, this study evaluated the impact of soil temperature and moisture on soil organic carbon mineralisation under synthetic (NPK) and organic (biochar) amendments in a maize cropping system in Ilorin, Southern Guinea Savanna of Nigeria. The objectives were to determine the C mineralisation and C sequestering potential under each amendment and assess how precipitation amounts and soil temperature influence carbon mineralisation. Two soil typ

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English, L. T. P., V. H. Galvan, and C. R. Pullinger. "Geological setting of gold-silver mineralization in the La India mining district, Nicaragua." Naturalis Scientias 01, no. 01 (2024): 41–45. http://dx.doi.org/10.62252/nss.2024.1003.

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La India gold mining district covers a 50 km² area of fault-fill gold-silver mineralized quartz-adularia veins on the western margin of a Tertiary volcanic arc in western Nicaragua. Historic mining records and modern mineral exploration data, which to-date has defined a mineral endowment of over 2.3 Moz gold, provide a wealth of geological information. This paper draws on these observations and data to describe and classify the gold-silver mineralisation at La India, identify the geological controls, and interpret the timing of mineralisation within the regional tectonic setting. The district-

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Laizer, Peter, and Gabriel D. Mulibo. "Geophysical delineation of the geology and subsurface features of the Iramba area, central Tanzania, using aero-geophysical data with implications for mineral deposits." Tanzania Journal of Science 51, no. 1 (2025): 102–14. https://doi.org/10.4314/tjs.v51i1.8.

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The Iramba area, known for its gold, base metal, and metallic mineral deposits, is not geophysically well exploited. The research presents an in-depth geophysical interpretation of the geology and the subsurface geological features and delineates hydrothermal alteration zones related to mineralisation in the area. The study involved detailed analysis and interpretations of high-resolution aero–geophysical data. Results from radiometric data have identified new granitic rocks and revealed a unique prominent feature in the region, which was previously not mapped. The identified new xenolith and

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Baños-González, Manuel A., Juan Calderón-Colmenero, Alberto Aranda-Fraustro, et al. "Aortic mineralisation in children with congenital cardiac disease." Cardiology in the Young 21, no. 5 (2011): 551–55. http://dx.doi.org/10.1017/s1047951111000448.

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AbstractBackgroundCongenital cardiac diseases are the most frequent congenital malformations. In adult patients, the mineralisation of the aorta due to cardiovascular disease is very common, but vascular mineralisation in paediatric cardiopathies is a topic less studied. This study shows that children with a complex congenital cardiopathy show a high degree of vascular mineralisation in the ascending aorta. This can be part of the cardiac failure pathophysiology due to congenital cardiopathies.ObjectiveThe aim of this study was to determine the presence and degree of vascular mineralisation in

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Biswas, S. K. "Gold Mineralisation in Uti Block of Hutti-Maski Supracrustal Belt, Karnataka." Journal Geological Society of India 36, no. 1 (1990): 79–89. http://dx.doi.org/10.17491/jgsi/1990/360110.

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Abstract Gold mineralisation, hosted by varied lithounits, is broadly classified into two types. 1) Syngenetic stratabound type, 2) Epigenetic lode type Syngenetic stratabound type mineralisation, confined to pyritiferous carbonaceous schist, has little economic significance, whereas economic deposits belong to epigenetic type. Epigenetic lode type mineralisation is hosted by both mafic and felsic rocks. Mineralised zones are confined to structural dilatant zones (shear zones) and are characterised by wall-rock alteration. Mineralogical and geochemical changes are most conspicuous.

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Angus, J. F., A. F. van Herwaarden, D. P. Heenan, R. A. Fischer, and G. N. Howe. "The source of mineral nitrogen for cereals in south-eastern Australia." Australian Journal of Agricultural Research 49, no. 3 (1998): 511. http://dx.doi.org/10.1071/a97125.

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The relative importance of soil mineral nitrogen (N) available at the time of sowing ormineralised during the growing season was investigated for 6 crops of dryland wheat. The soil mineral N in the root-zone was sampled at sowing and maturity and the rate of net mineralisation in the top 10 cm was estimated by sequential sampling throughout the growing season, using an in situ method. Mineralisation during crop growth was modelled in relation to total soil N, ambient temperature, andsoil water content. Mineral N accumulated before sowing varied by a factor of 3 between the sites (from 67 to 19

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Murphy, D. V., G. P. Sparling, I. R. P. Fillery, A. M. McNeill, and P. Braunberger. "Mineralisation of soil organic nitrogen and microbial respiration after simulated summer rainfall events in an agricultural soil." Soil Research 36, no. 2 (1998): 231. http://dx.doi.org/10.1071/s97043.

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Simulated rainfall events were applied during the summer fallow period to a Western Australian agricultural soil, a loamy sand, under continuous wheat and after the second pasture phase of a 2 pasture : 1 wheat (2P : 1W) rotation. The aims of this study were to determine the change in microbial activity, amount of net and gross nitrogen (N) mineralised, and inorganic N produced after dry soil was re-wet during summer rainfall. Three irrigation treatments were applied: (i) control soils received no water, (ii) the single wet treatment received 45 mm of water on day 0 and was allowed to dry, and

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Knapik, Piotr, Aleksandra Latacz, and Michał Kubecki. "Microwave-Assisted Preparation of sinter samples for chemical composition analysis by IPC-OES technique." Materials Science and Welding Technologies 67, no. 5-6/2023 (2024): 1–6. https://doi.org/10.32730/mswt.2023.67.5-6.2.

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The article discusses tests aimed to develop a method enabling the preparation of iron ore sinters applying microwave-assisted mineralisation and subsequently used in the ICP-OES technique-based chemical composition analysis. The tests involved the use of various mineralising mixtures, one of which was selected to prepare specimens of sinters used in the ICP-OES technique-based chemical composition analysis. The repeatability of the microwave-assisted mineralisation of sinters was investigated through the repeated mineralisation of the same sinter specimen performed under the same conditions.

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Ravindra, B. M., B. Krishna Rao, and V. N. Vasudev. "Ore Petrological Aspects of Copper Mineralisation Near Kalyadi, Hassan District, Karnataka." Journal Geological Society of India 35, no. 2 (1990): 159–72. http://dx.doi.org/10.17491/jgsi/1990/350204.

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Abstract Low-grade copper sulphide mineralisation around Kalyadi is localised in an early Precambrian volcanosedimentary suite, characterised by cyclic sedimentational features. The rocks have been intruded by ultramafics, granite and dolerite. The supracrustals have been subjected to three phases of deformation and low-grade metamorphism. The Fe-Cu sulphide mineralisation is stratiform and stratabound, represented by pyrite. chalcopyrite and pyrrhotite. The salient features of tbe mineralisation suggest that the sulphide ore material derived from volcanic exhalatives was deposited along with

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Riedel, Stefanie, Daniel Ward, Radmila Kudláčková, et al. "Electron Beam-Treated Enzymatically Mineralized Gelatin Hydrogels for Bone Tissue Engineering." Journal of Functional Biomaterials 12, no. 4 (2021): 57. http://dx.doi.org/10.3390/jfb12040057.

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Biological hydrogels are highly promising materials for bone tissue engineering (BTE) due to their high biocompatibility and biomimetic characteristics. However, for advanced and customized BTE, precise tools for material stabilization and tuning material properties are desired while optimal mineralisation must be ensured. Therefore, reagent-free crosslinking techniques such as high energy electron beam treatment promise effective material modifications without formation of cytotoxic by-products. In the case of the hydrogel gelatin, electron beam crosslinking further induces thermal stability

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Parfitt, R. L., G. J. Salt, and S. Saggar. "Effect of leaching and clay content on carbon and nitrogen mineralisation in maize and pasture soils." Soil Research 39, no. 3 (2001): 535. http://dx.doi.org/10.1071/sr00044.

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We conducted a 7-week laboratory incubation experiment to evaluate the effect of leaching on net C and N mineralisation in soils. The soils were collected from adjacent fields of long-term pasture and maize, where each field contained an Inceptisol and an Andisol. The concentration of clay mineral was 200 g/kg halloysite in the Inceptisol and 120 g/kg allophane in the Andisol. Half the samples were leached weekly with 0.002 M CaCl2 at a suction of 20 kPa to remove soluble products, and half were not leached. Carbon mineralisation was determined from CO2-C evolved each week. Net N mineralisatio

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Vanin, Vadim A., Alexei V. Ivanov, Viktor A. Gorovoy, Alexander E. Budyak, and Nikolay S. Bortnikov. "Timing of Ore Mineralisation in Deposits of the Baikal-Muya Belt and the Barguzin-Vitim Super-Terrain (Transbaikalie)." Minerals 14, no. 11 (2024): 1158. http://dx.doi.org/10.3390/min14111158.

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The study was aimed at dating of Au ores from the Yubileinoe, Irokinda and Uryakh deposits located in the Baikal-Muya fold belt and Pb-Zn ores from the Ozernoe deposit in the Barguzin-Vitim super-terrain (Transbaikalia, Russia). The 40Ar/39Ar ages on pyrite-encapsulated sericite of gold-bearing quartz sampled from veins in the Yubileinoe, Irokinda and Uryakh deposits are 265 ± 33 Ma, 276 ± 13 Ma and 287 ± 7 Ma, respectively. The age of disseminated mineralisation in the Ozernoe deposit is 329 ± 19 Ma. The results of this study and previously published data suggest two stages of ore mineralisat

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Sparling, Graham, Robert Dragten, Jackie Aislabie, and Rhonda Fraser. "Atrazine mineralisation in New Zealand topsoils and subsoils: influence of edaphic factors and numbers of atrazine-degrading microbes." Soil Research 36, no. 4 (1998): 557. http://dx.doi.org/10.1071/s97065.

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The mineralisation of 14C-ring-labelled atrazine to 14CO2 was measured in 3 contrasting New Zealand soils under controlled conditions of temperature and moisture. The numbers of atrazine-degrading organisms were measured by a most probable number technique. Decomposition rates were slow, with a maximum of 41% of atrazine being mineralised over 263 days. Mineralisation was generally very low in subsoils and was much reduced by low moisture content. However, one subsoil from 60–90 cm depth had unusually high numbers of atrazine-degrading microbes and showed mineralisation greater than or equival

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Armstrong, Katy, André Bardow, Xiangkun Elvis Cao, et al. "Accelerated mineralisation: general discussion." Faraday Discussions 230 (2021): 213–26. http://dx.doi.org/10.1039/d1fd90046c.

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Dunham, K. C. "Pennine mineralisation in depth." Proceedings of the Yorkshire Geological Society 47, no. 1 (1988): 1–12. http://dx.doi.org/10.1144/pygs.47.1.1.

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Ineson, P. R. "Mineralisation and Shear Zones." Ore Geology Reviews 7, no. 1 (1992): 74–75. http://dx.doi.org/10.1016/0169-1368(92)90021-c.

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Sienkiewicz, Jadwiga, Grażyna Porębska, Apolonia Ostrowska, and Dariusz Gozdowski. "Indicators of peat soil degradation in the Biebrza valley, Poland." Environmental Protection and Natural Resources 30, no. 2 (2019): 41–51. http://dx.doi.org/10.2478/oszn-2019-0009.

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Abstract Peat mineralisation leads to net loss of CO2 to the atmosphere, as well as to release of other elements from the decomposed soil organic matter (SOM) to groundwater. This results in the degradation of peat soils and the ecosystems they support. Here we evaluated the practical indicatory suitability of the existing and proposed new indices for the assessment of peat soil degradation in the Biebrza river valley encompassing, unique on European scale, peatland ecosystems. We studied relationships between soil organic carbon (SOC) and total nitrogen (Ntot), dissolved organic carbon (DOC)

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Sørensen, Peter, Ingrid K. Thomsen, and Jaap J. Schröder. "Empirical model for mineralisation of manure nitrogen in soil." Soil Research 55, no. 6 (2017): 500. http://dx.doi.org/10.1071/sr17018.

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A simple empirical model was developed for estimation of net mineralisation of pig and cattle slurry nitrogen (N) in arable soils under cool and moist climate conditions during the initial 5 years after spring application. The model is based on a Danish 3-year field experiment with measurements of N uptake in spring barley and ryegrass catch crops, supplemented with data from the literature on the temporal release of organic residues in soil. The model estimates a faster mineralisation rate for organic N in pig slurry compared with cattle slurry, and the description includes an initial N immob

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N.A Tennakoon and M. de S, Liyanage. "NET N MINERALISATION IN COCONUT/NITROGEN FIXING TREE BASED SYSTEM." CORD 13, no. 01 (1997): 34. http://dx.doi.org/10.37833/cord.v13i01.307.

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To study the net N mineralisation rates of coconut/NFT plantations, a field incubation technique was carried out. In this study, four types of NFT i.e. Acacia auriculiformis, Calliandra calothyrsus, Gliricidia sepium, Leucaena leucocephala and coconut monocropping were selected. Forty plastic tubes were inserted into the soil, to a depth of 15 cm at a distance of 2 m and l m away from coconut palm, for field incubation period of 2 weeks. Similarly another set of forty tubes were inserted for a 4 week field incubation period, after removing the previous set of tubes. Fresh soll samples (same de

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38

Bierlein, Frank P., and Paul K. Smith. "The Touquoy Zone deposit: an example of "unusual" orogenic gold mineralisation in the Meguma Terrane, Nova Scotia, Canada." Canadian Journal of Earth Sciences 40, no. 3 (2003): 447–66. http://dx.doi.org/10.1139/e03-002.

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The Touquoy Zone deposit is host to disseminated gold mineralisation in metasiltstones of lower Palaeozoic age. From the close correlation between ore grades and the intersection of favourable stratigraphy and bounding faults, it is apparent that mineralisation is controlled by both structural and lithological influences. Within the ore zone, disseminated gold, arsenopyrite, pyrite, and rare base-metal sulphides are associated with a network of widely spaced, millimetre-scale, quartzcarbonate veinlets. Quasi-pervasive fluid flow and prolonged interaction with the host rocks resulted in a diff

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Widowati, Ladiyani R., Steven Sleutel, Diah Setyorini, Sukristiyonubowo, and Stefaan De Neve. "Nitrogen mineralisation from amended and unamended intensively managed tropical andisols and inceptisols." Soil Research 50, no. 2 (2012): 136. http://dx.doi.org/10.1071/sr11225.

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Intensive vegetable production systems throughout South East Asia are characterised by large nutrient inputs and low nitrogen (N) use efficiencies. In Indonesia, intensive vegetable production is concentrated on volcanic highland soils starting from an altitude of around 700 m above sea level. We measured potential N mineralisation from soil organic matter and from several representative organic materials in Andisols and Inceptisols with andic properties from Central Java, Indonesia. Unamended soils and soils amended with crop residues, animal manures, and compost were incubated during 3–4 mon

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40

Goh, K. M., and M. L. Nguyen. "Estimating net annual soil sulfur mineralisation in New Zealand grazed pastures using mass balance models." Australian Journal of Agricultural Research 48, no. 4 (1997): 477. http://dx.doi.org/10.1071/a95123.

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Estimates of net soil sulfur (S) mineralisation of grazed pastures in New Zealand were made using the New Zealand Ministry of Agriculture (MAF) S model and a recently developed simple mass-balance S model. Quantitative estimates of S inputs and outputs in the MAF S model were also compared with those obtained in recent field trials. Results obtained showed that the MAF S model was reasonably accurate in estimating S inputs and outputs and long-term maintenance pasture S requirements but not short-term pasture S requirements, due to the parameters used not accounting for the effects of major fa

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Knudsen, Christian, Jeroen A. M. Van Gool, Claus Østergaard, et al. "Gold-hosting supracrustal rocks on Storø, southern West Greenland: lithologies and geological environment." Geological Survey of Denmark and Greenland (GEUS) Bulletin 13 (October 12, 2007): 41–44. http://dx.doi.org/10.34194/geusb.v13.4972.

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A gold prospect on central Storø in the Nuuk region of southern West Greenland is hosted by a sequence of intensely deformed, amphibolite facies supracrustal rocks of late Mesoto Neoarchaean age. The prospect is at present being explored by the Greenlandic mining company NunaMinerals A/S. Amphibolites likely to be derived from basaltic volcanic rocks dominate, and ultrabasic to intermediate rocks are also interpreted to be derived from volcanic rocks. The sequence also contains metasedimentary rocks including quartzites and cordierite-, sillimanite-, garnet- and biotite-bearing aluminous gneis

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42

Tiddy, Caroline, Diana Zivak, June Hill, et al. "Monazite as an Exploration Tool for Iron Oxide-Copper-Gold Mineralisation in the Gawler Craton, South Australia." Minerals 11, no. 8 (2021): 809. http://dx.doi.org/10.3390/min11080809.

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The chemistry of hydrothermal monazite from the Carrapateena and Prominent Hill iron oxide-copper-gold (IOCG) deposits in the IOCG-rich Gawler Craton, South Australia, is used here to define geochemical criteria for IOCG exploration in the Gawler Craton as follows: Monazite associated with IOCG mineralisation: La + Ce > 63 wt% (where La > 22.5 wt% and Ce > 37 wt%), Y and/or Th < 1 wt% and Nd < 12.5 wt%; Intermediate composition monazite (between background and ore-related compositions): 45 wt% < La + Ce < 63 wt%, Y and/or Th < 1 wt%. Intermediate monazite compositions p

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Zhao, Wei, Jin-bo Zhang, Christoph Müller, and Zu-cong Cai. "Effects of pH and mineralisation on nitrification in a subtropical acid forest soil." Soil Research 56, no. 3 (2018): 275. http://dx.doi.org/10.1071/sr17087.

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Effects of pH on nitrification have been explored widely; however, few researchers have investigated the compound effects of pH and mineralisation on nitrification and responsible nitrifiers in subtropical forest soils. An acid subtropical forest soil was subjected to pH treatments by liming for 40 days at 25°C and 60% water holding capacity. After 40 days, gross N transformation rates in the samples were evaluated using the 15N tracing technique and model. Ammonia-oxidising bacteria (AOB) and ammonia-oxidising archaea (AOA) were quantified by quantitative polymerase chain reaction. The result

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Di, H. J., G. P. Sparling, R. Lee, and G. N. Magesan. "The effect of mineralisation rates of atrazine in surface and subsurface soils on its groundwater contamination potential." Soil Research 39, no. 1 (2001): 175. http://dx.doi.org/10.1071/sr00004.

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Atrazine is a widely used herbicide for weed control and has been found in groundwater in many countries. The groundwater contamination potential of atrazine in 2 soils on the east coast of the North Island of New Zealand was modelled under 3 scenarios. Scenario 1 used atrazine mineralisation rates as determined in an incubation experiment which showed higher rates of mineralisation in subsoil layers than in surface soils. Scenario 2 assumed a decreasing mineralisation rate with soil depth in proportion to changes in microbial biomass. Scenario 3 used a logistic model to describe atrazine mine

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Sierra, J., G. Loranger-Merciris, L. Desfontaines, and M. Boval. "Aerobic microbial activity in four tropical earthworm-soil systems. A mesocosm experiment." Soil Research 52, no. 6 (2014): 584. http://dx.doi.org/10.1071/sr14034.

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Soil organic matter (SOM) quality and carbon (C) availability may be major features influencing the effect of earthworms on the aerobic processes in clayey tropical soils. In this study, we assessed the effect of an anecic (Polypheretima elongata), an endogeic (Pontoscolex corethrurus) and an epigeic (Eudrilus eugeniae) earthworm on the aerobic microbial activity of two tropical soils, a calcic Vertisol and an acid Ferralsol, with clay content >70% and very different organic C content and SOM stability. The soil–earthworm interaction was studied in a 6-month mesocosm experiment in a greenho

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46

Paul, K. I., P. J. Polglase, A. M. O'Connell, J. C. Carlyle, P. J. Smethurst, and P. K. Khanna. "Soil nitrogen availability predictor (SNAP): a simple model for predicting mineralisation of nitrogen in forest soils." Soil Research 40, no. 6 (2002): 1011. http://dx.doi.org/10.1071/sr01114.

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A new empirical model (SNAP) combines a simple laboratory measurement of the basal rate of N mineralisation with the modifying effects of daily temperature and water content to predict seasonal and annual rates of mineralisation of forest soils. Short-term (20-60-day) aerobic incubations of either undisturbed or bulked and mixed soil were found suitable for prediction of the basal rate of N mineralisation. Data from laboratory incubations of a range of soils were used to calibrate empirical relationships describing the effects of temperature (Tm) and water (Wm) on rates of N mineralisation. Su

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47

Murphy, D. V., G. P. Sparling, and I. R. P. Fillery. "Stratification of microbial biomass C and N and gross N mineralisation with soil depth in two contrasting Western Australian agricultural soils." Soil Research 36, no. 1 (1998): 45. http://dx.doi.org/10.1071/s97045.

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The distribution of microbial biomass C and N and the decline in gross N mineralisation and NH4+ consumption with soil depth was investigated in 2 soils with different soil texture and land use. Soils were from an annual pasture on a loamy sand and from a sandy clay loam previously cropped with wheat. Intact soil cores were collected from the surface 0–10 cm in steel tubes and were sampled in 2·5 cm layers. Disturbed soil down to 50 cm was collected in 10 cm sections using a sand auger. Microbial biomass was estimated by chloroform fumigation and 0·5 M K2SO4 extraction. Microbial biomass C was

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Vonopartis, L. C., R. Booysen, P. A. M. Nex, J. A. Kinnaird, and L. J. Robb. "Combined satellite and portable XRF exploration mapping of the Zaaiplaats tin field, South Africa." South African Journal of Geology 125, no. 1 (2022): 45–60. http://dx.doi.org/10.25131/sajg.125.0006.

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Abstract The Zaaiplaats tin field is host to two of the historically most significant tin mines in South Africa. The geological maps of Zaaiplaats and Groenfontein have not been updated since the 1980s and 1950s respectively and warrant a renewed investigation. Cassiterite is hosted in the Bobbejaankop and Lease granites, of the Zaaiplaats and Groenfontein tin mines, which are part of the Lebowa Granite Suite of the Bushveld Complex. Tin mineralisation is primarily hosted as low-grade disseminations and within networks of high-grade hydrothermal pipes and lenticular ore-bodies. One difficulty

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Sakkas, Panagiotis, Idiegberanoise Oikeh, Damer P. Blake, Sheralyn Smith, and Ilias Kyriazakis. "Dietary vitamin D improves performance and bone mineralisation, but increases parasite replication and compromises gut health in Eimeria-infected broilers." British Journal of Nutrition 122, no. 6 (2019): 676–88. http://dx.doi.org/10.1017/s0007114519001375.

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AbstractCoccidial infections reduce fat-soluble vitamin status and bone mineralisation in broiler chickens. We hypothesised that broilers infected with Eimeria maxima would benefit from increased dietary supplementation with vitamin D (vitD) or with 25-hydroxycholecalciferol (25(OH)D3 or 25D3). Broilers were assigned to diets with low (L) or commercial (M) vitD levels (25 v. 100 μg/kg) supplemented as cholecalciferol (D3) or 25D3. At day 11 of age, birds were inoculated with water or 7000 E. maxima oocysts. Pen performance was calculated over the early (days 1–6), acute (days 7–10) and recover

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Strong, D. T., P. W. G. Sale, and K. R. Helyar. "The influence of the soil matrix on nitrogen mineralisation and nitrification III. Predictive utility of traditional variables and process location within the pore system." Soil Research 37, no. 1 (1999): 137. http://dx.doi.org/10.1071/s98042.

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Regression analysis was used to examine the importance of organic nitrogen (%N), soil water content (θv), soil pH, and C: N ratio for predicting N mineralisation in a small field plot. Undisturbed soil cubes (c. 1·7 cm3) were collected from the soil surface and received treatments of drying and rewetting, urea, substrate derived from clover leachate, or no amendment, and were incubated at either –10 or –30 kPa for 20 days. The data confirm the hypothesis that within a small field plot, θv and %N explain most of the variation in net N mineralisation and nitrification. The pore size classes of 0

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