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1تقرير
المؤلفون: Tan, Wei, Reddy, Steven M., Fougerouse, Denis, Wang, Christina Yan, Wei, Bo, Xian, Haiyang, Yang, Yiping, He, Hongping
مصطلحات موضوعية: Geochemistry & Geophysics, Mineralogy, Microstructure, Deformation, Episodic ore-forming fluids, Pyrite, Lode gold deposit, Bi-(Te)-rich melt, JIAODONG PENINSULA, OXIDATION-STATE, U-PB, EVOLUTION, MINERALIZATION, CONSTRAINTS, RECRYSTALLIZATION, REMOBILIZATION, REPLACEMENT
الوصف: Complex microstructures of pyrite induced by superimposed deformation and fluid infiltration in lode gold deposits can record time-integrated physicochemical changes of ore-forming fluids. This study used a combination of techniques (EBSD, mu-XRF, EMPA, APT, and TEM) to characterize and decode the microstructures of pyrite in an optically homogeneous polymetallic sulfide veinlet of the Wulong lode gold deposit. The EBSD data show that the sulfide veinlet is composed of microstructurally heterogeneous pyrite grains in three generations, i.e., Py-1, Py-2, and Py-3. The pyrite grains display diverse deformation-induced microstructures, i.e., kinked low-angle (0.5 to 5 degrees) boundaries within Py-1, curvilinear low-angle boundaries penetrating both Py-1 and Py-2, and foam-like textured Py-3. These microstructures may offer pathways to transport exotic fluids, leading to superimposed microstructures in early-formed pyrite. Integrated mu-XRF, EMPA, APT, and HRTEM data sets present grain- to nanometer-scale elemental distributions of Au, As, Bi, and Te, and reveal that the Bi-(Te)-rich mineral associations, rather than arsenian pyrite, are major gold carriers in the polymetallic sulfide veinlet. The superimposed microstructures in pyrite reveal that the major Au mineralization stage likely comprises two episodes of ore-forming fluids. The early-episode fluids had T-fO(2) condition overlapping the stable field of pyrrhotite, which dissolved Py-1 and developed Bi-(Te)-rich melts as major Au scavengers. The late-episode fluids crystallized arsenian Py-2 containing 20-60 ppm of invisible gold. This study highlights the effectiveness of multiple techniques to reveal complex microstructures of pyrite, which can serve as critical fingerprints to establish a temporal framework of fluid evolution and Au deposition in lode gold deposits.
العلاقة: MINERALIUM DEPOSITA; http://ir.gig.ac.cn/handle/344008/67532Test
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2دورية أكاديمية
المؤلفون: Balekoglu, Safa, Caliskan, Servet, Makineci, Ender, Dirik, Huseyin
مصطلحات موضوعية: Germination percentage, Mean germination time, Pinus pinea, Seed reserve, Chemical-Composition, Remobilization, Co2
الوصف: Stone pine (Pinus pinea L.) is mostly known for its edible kernels, which have been used for human consumption since Paleolithic times because of its highly nutritive value including high fat and protein. It is an important tree species in the Mediterranean basin, and one of the five native pine species in Turkey. Stone pine is also a crop in agroforestry in Mediterranean climate zones. Germination traits, carbon (C) and nitrogen (N) concentrations, C/N, carbon mass (CM) and nitrogen mass (NM) were investigated in seed lots of five native stone pine populations of Turkey. Significant differences were found among populations in terms of seed C and N concentrations. Seed germinations were conducted at 15 C-o, 20 C-o and 25 C-o temperatures for 28 days. Germination percentage (GP) at 20 degrees C was the highest in all populations and up to 93%. The highest mean germination time (MGT) was 25 days at 15 degrees C and the minimum MGT was 13 days at 20 degrees C. C and N concentrations were 61-63% and 7.3-8.0%, respectively. The magnitude of the variance of C, N, C/N, CM and NM among the populations was 16%, 55%, 54%, 13%, and 16% respectively. MGT-N% (R-2 = 0.88) and MGT-C/N (R-2 = 0.78) at 20 degrees C and MGT-(C%-N%) (R-2 = 0.95) at 15 degrees C indicated clearly the influence of C and N on seed MGT. Strong relationships suggest that stone pine seed carbon and nitrogen can be used as a relevant and fast assessment of seed viability in the context of nursery and afforestation techniques. ; Scientific Research Projects Coordination Unit of Istanbul University-Cerrahpasa [FBA-2016-21357] ; This study was supported by the Scientific Research Projects Coordination Unit of Istanbul University-Cerrahpasa. Project No. FBA-2016-21357. The carbon and nitrogen contents of Pinus pinea seeds were determined by Prof. Dr. Ender Makineci and Dr. Serdar Akburak in Soil Science and Ecology Department at Istanbul University-Cerrahpasa. We appreciate all the efforts made by Dr. Serdar Akburak.
العلاقة: Erwerbs-Obstbau; Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı; https://doi.org/10.1007/s10341-021-00593-3Test; https://hdl.handle.net/20.500.12831/4948Test; 63; 369; 374; WOS:000698074800001
الإتاحة: https://doi.org/10.1007/s10341-021-00593-3Test
https://doi.org/20.500.12831/4948Test
https://hdl.handle.net/20.500.12831/4948Test -
3دورية أكاديمية
المؤلفون: Kuo-Tung Jiann Peng Ho
المصدر: Terrestrial, Atmospheric and Oceanic Sciences, Vol 25, Iss 5, p 655 (2014)
مصطلحات موضوعية: Cadmium, Manganese, Dissolved and particulate phases, Estuarine chemistry, Removal, Remobilization, Geology, QE1-996.5, Geophysics. Cosmic physics, QC801-809
الوصف: This study investigates various hydrological and redox conditions controlling phase transformation, removal and remobilization of Cd in three different estuaries in Taiwan. It was found that Cd mixing patterns in estuarine waters are controlled mainly by redox conditions and salinity. In a highly urbanized estuary segment low oxygen conditions caused sulfide production and the formation of stable Cd sulfide minerals. In oxygen-replete waters [dissolved oxygen (DO) > 200 µM], high concentrations of Mn(II), likely from exchange with bottom sediments were oxidized into Mn oxides, on which Cd is adsorbed. However, in the lower estuary regions elevated chloride concentrations are likely able to compete for Cd, with large proportions of Cd becoming complexed with chloride. The stable Cd sulfide minerals, resistant to oxidation in estuaries having short flushing time, are likely settling out and depositing into bottom sediments. Reversible Cd adsorption onto Mn oxides can enhance Cd mobility in lower estuary and coastal regions where Cd chloro-complexes form, resulting in greater Cd transport fluxes into the ocean.
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4دورية أكاديمية
المساهمون: Universidade Estadual Paulista (UNESP)
مصطلحات موضوعية: Cotton, Micronutrient, Boron, Translocation, Remobilization
الوصف: Boron (B) is the most deficient micronutrient in cotton (Gossypium hirsutum L.). It is generally accepted that B is immobile in cotton phloem, but some cultivars could remobilize the nutrient. In order to further understand B uptake and mobility in various cotton cultivars two experiments were conducted.In experiment-1, cotton cultivars were grown in B-10 enriched or natural abundance nutrient solutions for 4 weeks and transferred to nutrient solutions ranging from deficient to sufficient in B. In experiment-2 B-10 enriched boric acid was applied to cotton leaves and B mobilization was determined.In deficient plants, B previously supplied to roots was remobilized from older to younger plant tissues, but the amount was insufficient to maintain growth. Boron deficiency symptoms appeared and progressed with time. Boron applied to leaves was taken up and remobilized within 24 h. Boron mobilization was higher to plant parts above the treated region.Boron uptake and mobilization was similar among cotton cultivars. Boron applied to cotton leaves shows a preferential translocation to younger tissues. Foliar sprays of B to cotton may be used to cope with a temporary deficiency, but to achieve full growth and development B must be available to cotton throughout the plant cycle.
وصف الملف: 241-253
العلاقة: Plant and Soil; 3.306; http://dx.doi.org/10.1007/s11104-013-1957-9Test; Plant And Soil. Dordrecht: Springer, v. 375, n. 1-2, p. 241-253, 2014.; http://hdl.handle.net/11449/113304Test; WOS:000331204500019; 5720775873259528; orcid:0000-0003-2001-0874
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5دورية أكاديمية
المساهمون: Agroressources et Impacts environnementaux (AgroImpact), Institut National de la Recherche Agronomique (INRA), Agroclim (AGROCLIM)
المصدر: ISSN: 1939-1234 ; BioEnergy Research ; https://hal.inrae.fr/hal-02636609Test ; BioEnergy Research, 2014, 7 (4), pp.1253 - 1269. ⟨10.1007/s12155-014-9462-4⟩ ; http://linkTest.springer.com/journal/12155.
مصطلحات موضوعية: Miscanthus, Storage, Bioenergy, RADIATION USE EFFICIENCY, BIOENERGY CROP, LIGHT INTERCEPTION, PRODUCTIVITY, REMOBILIZATION, GROWTH, WATER, Model, Remobilisation, Perennial plant, STICS, SEASONAL DYNAMICS, C-4 GRASSES, SOIL, [SDV]Life Sciences [q-bio], [SDE]Environmental Sciences, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology
الوصف: International audience ; Biomass production by perennial plants promises to increase land use efficiency and reduce greenhouse gas emissions from cropping systems dedicated to bioenergy production. The modelling of both biomass production and the environmental impacts of these systems over the long term is needed in order to evaluate their sustainability. New equations have been added to the STICS soil-crop-atmosphere model to provide a better description of perennial organs and their relationship with non-perennial ones, corresponding to the rhizomes and shoots, respectively in the Miscanthus x giganteus case study. Their description is intended to be generic for perennial plants, supported by the functional approach of STICS. The new version of STICS 8 was calibrated using published data and then validated against independent data. It was able to simulate the biomass and nitrogen content of the shoots (with a model efficiency of 0.95 and 0.70, respectively) and reproduce the dynamic of biomass and nitrogen in perennial organs (with a model efficiency of 0.41 and 0.63, respectively). Some of the model's improvements are discussed. Modifications to the model allowed simulations of the effect of cultural practices, such as nitrogen fertilisation or harvest date, on the biomass and nitrogen content of rhizomes and shoots.
العلاقة: hal-02636609; https://hal.inrae.fr/hal-02636609Test; PRODINRA: 287528; WOS: 000345584500018
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6
المؤلفون: Raz Avni, Facundo Tabbita, Stephen Pearce, Assaf Distelfeld, Rongrong Zhao, Jorge Dubcovsky, Tzion Fahima, Cristobal Uauy, Yan Jun, Ann J. Slade
المصدر: Avni, R; Zhao, R; Pearce, S; Jun, Y; Uauy, C; Tabbita, F; et al.(2014). Functional characterization of GPC-1 genes in hexaploid wheat.. Planta, 239(2), 313-324. doi: 10.1007/s00425-013-1977-y. UC Davis: Retrieved from: http://www.escholarship.org/uc/item/1sd065mzTest
Planta, vol 239, iss 2مصطلحات موضوعية: Chlorophyll, GRAIN PROTEIN CONTENT, Time Factors, Mutant, Plant Biology, Plant Science, Remobilization, chemistry.chemical_compound, Gene Knockout Techniques, Nutrient, Gene Expression Regulation, Plant, Biomass, Micronutrients, Photosynthesis, Triticum, Plant Proteins, education.field_of_study, food and beverages, Plants, Plants, Genetically Modified, Horticulture, Zinc, Phenotype, Ethyl Methanesulfonate, Biotecnología Agrícola y Biotecnología Alimentaria, Senescence, Crop and Pasture Production, Ethyl methanesulfonate, Nitrogen, NAM transcription factor, Iron, Population, Plant Biology & Botany, Biotecnología Agropecuaria, WHEAT, Genetically Modified, Biology, Article, Anthesis, Botany, Genetics, education, Gene, Cloning, Biological Transport, Plant, Plant Leaves, chemistry, Gene Expression Regulation, MUTANTS, SENESCENCE, CIENCIAS AGRÍCOLAS, Mutation, Edible Grain, Transcription Factors
الوصف: In wheat, monocarpic senescence is a tightly regulated process during which nitrogen (N) and micronutrients stored pre-anthesis are remobilized from vegetative tissues to the developing grains. Recently, a close connection between senescence and remobilization was shown through the map-based cloning of the GPC (grain protein content) gene in wheat. GPC-B1 encodes a NAC transcription factor associated with earlier senescence and increased grain protein, iron and zinc content, and is deleted or non-functional in most commercial wheat varieties. In the current research, we identified 'loss of function' ethyl methanesulfonate mutants for the two GPC-B1 homoeologous genes; GPC-A1 and GPC-D1, in a hexaploid wheat mutant population. The single gpc-a1 and gpc-d1 mutants, the double gpc-1 mutant and control lines were grown under field conditions at four locations and were characterized for senescence, GPC, micronutrients and yield parameters. Our results show a significant delay in senescence in both the gpc-a1 and gpc-d1 single mutants and an even stronger effect in the gpc-1 double mutant in all the environments tested in this study. The accumulation of total N in the developing grains showed a similar increase in the control and gpc-1 plants until 25 days after anthesis (DAA) but at 41 and 60 DAA the control plants had higher grain N content than the gpc-1 mutants. At maturity, GPC in all mutants was significantly lower than in control plants while grain weight was unaffected. These results demonstrate that the GPC-A1 and GPC-D1 genes have a redundant function and play a major role in the regulation of monocarpic senescence and nutrient remobilization in wheat. Fil: Avni, Raz. Tel Aviv University; Israel Fil: Zhao, Rongrong. China Agricultural University; República de China. University of California at Davis; Estados Unidos Fil: Pearce, Stephen. University of California at Davis; Estados Unidos Fil: Jun, Yan. University of Haifa; Israel Fil: Uauy, Cristobal. University of California at Davis; Estados Unidos Fil: Tabbita, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. University of California at Davis; Estados Unidos Fil: Fahima, Tzion. University of Haifa; Israel Fil: Slade, Ann. Arcadia Biosciences Inc.; Estados Unidos Fil: Dubcovsky, Jorge. University of California at Davis; Estados Unidos Fil: Distelfeld, Assaf. Tel Aviv University; Israel
وصف الملف: application/pdf
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::161e639fca20a7cdd370bed653fdbcdeTest
https://linkTest.springer .com/article/10.1007/s00425-013-1977-y -
7دورية أكاديمية
المؤلفون: A. Trivellini, A. Ferrante, P. Vernieri, G. Carmassi, G. Serra
المساهمون: A. Trivellini, A. Ferrante, P. Vernieri, G. Carmassi, G. Serra
مصطلحات موضوعية: Flower parts, Reducing sugars, Sucrose, Micronutrients, Macronutrients, Flower senescence, Remobilization, Osmoregulation, Settore AGR/04 - Orticoltura e Floricoltura
الوصف: Although the physiological and molecular mechanisms of flower development and senescence have been extensively investigated, a whole-flower partitioning study of mineral concentrations has not been carried out. In this work, the distribution of sucrose, total reducing sugars, dry and fresh weight and macro and micronutrients were analysed in Hibiscus rosa-sinensis L. petals, stylestigma including stamens and ovary at different developmental stages (bud, open and senescent flowers). Total reducing sugars showed the highest value in petals of bud flowers, then fell during the later stages of flower development whereas sucrose showed the highest value in petals of senescent flowers. In petals, nitrogen and phosphorus content increased during flower opening, then nitrogen level decreased in senescent flowers. The calcium, phosphorus and boron concentrations were highest in ovary tissues whatever the developmental stage. Overall, the data presented suggests that the high level of total reducing sugars prior the onset of flower opening contributes to support petal cells expansion, while the high amount of sucrose at the time of petal wilting may be viewed as a result of senescence. Furthermore, this study discusses how the accumulation of particular mineral nutrients can be considered in a tissue specific manner for the activation of processes directly connected with reproduction.
العلاقة: info:eu-repo/semantics/altIdentifier/wos/WOS:000290802700008; volume:6; issue:3; firstpage:365; lastpage:375; journal:CENTRAL EUROPEAN JOURNAL OF BIOLOGY; http://hdl.handle.net/2434/156579Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79955482583
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8دورية أكاديمية
المؤلفون: Wölz, Jan, Engwall, Magnus, Maletz, Sibylle, Olsman Takner, Helena, van Bavel, Bert, Kammann, Ulrike, Klempt, Martin, Weber, Roland, Braunbeck, Thomas, Hollert, Henner
المصدر: Environmental science and pollution research : ESPR 15(7), 536-553 (2008). doi:10.1007/s11356-008-0056-6
مصطلحات موضوعية: info:eu-repo/classification/ddc/570, Biowissenschaften, Biologie, AhR, Cytotoxicity, Dioxin-like activity, DR-CALUX, EROD, Flood event, GPC.2D, Multilayer fractionation, Sediment, Suspended particulate matter, Remobilization
جغرافية الموضوع: DE
العلاقة: info:eu-repo/semantics/altIdentifier/wos/WOS:000260524700003; info:eu-repo/semantics/altIdentifier/issn/0944-1344; info:eu-repo/semantics/altIdentifier/issn/1614-7499; https://publications.rwth-aachen.de/record/131946Test; https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-013070%22Test
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9دورية أكاديمية
المؤلفون: Cappuyns, Valérie, Swennen, Rudy, Devivier, A
مصطلحات موضوعية: heavy metals, oxidation, ph, river sediments, polluted anoxic sediments, heavy-metals, resuspension, release, remobilization, mobilization, soils
الوصف: The influence of dredging and land-disposal of a severely polluted river sediment on the release of heavy metals was studied. During the first 20 days of sediment oxidation and ripening, the pH of the sediment decreased from 8.0 to 3.5 and considerable Zn-(g/L level), Ni-, Cd-, Co-, Cu-, Pb- and Cr-(mg/L level) concentrations were released into the porewater. ; status: published
العلاقة: Water air and soil pollution vol:171 issue:1-4 pages:49-66; https://lirias.kuleuven.be/handle/123456789/409799Test; http://gateway.newisiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=CCC&SrcApp=PRODUCT_NAME&SrcURL=WOS_RETURN_URL&CKEY=CAPP0049060171WV&DestLinkType=FullRecord&DestApp=CCC&SrcDesc=RETURN_ALT_TEXT&SrcAppSID=APP_SIDTest
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