Thematische Bibliographien / Seed Science and Technology

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Auswahl der wissenschaftlichen Literatur zum Thema „Seed Science and Technology“

Autor: Grafiati

Veröffentlicht am 18. Mai 2024

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Zeitschriftenartikel zum Thema "Seed Science and Technology"

Groot, Steven P. C. „Seed Science and Technology. Volume 48 Issue 1 (2020)“. Seed Science and Technology 48, Nr. 1 (30.04.2020): 133–42. http://dx.doi.org/10.15258/sst.2020.48.1.14.

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This issue of Seed Science and Technology contains a number of interesting papers worth giving additional attention. There are five papers that deal with analysis and breaking of seed dormancy, an important issue, not only for commercial practice and breeding, but also for regeneration of habitats and safeguarding bio- diversity. One paper in this issue describes how mucilage production by seeds can aid in overcoming drought stress during germination of seeds from a desert plant. Combatting seed borne diseases remains an important issue. One paper describes how treatment with a combination of two fungicides proved to be effective against seed transmitted seedling blight in Norway spruce. Another paper demonstrates a method to combat a seed- transmitted bacterial infection with watermelon in the seedling stage. Seed vigour tests are needed to give a better estimation of differences between seed lots regarding field emergence. A faster vigour test for tobacco seeds is proposed in a paper in this issue. Even traditional ISTA germination tests may be improved, as demonstrated in a paper for spinach seeds, where especially large seeds can be sensitive to a high moisture level in the tests. Instruments initially used in high-technology industries or in medical care sometimes find their way to seed science applications. An example described in this issue is the use of 3D X-ray computed tomography, which enables rapid non-destructive analyses of the morphology of individual seeds, which can be correlated with germination behaviour. Another paper is on the use of multispectral imaging for seed purity analysis with alfalfa seed lots.

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Hamman, Brigitte. „Seed Science and Technology. Volume 51 Issue 2 (2023)“. Seed Science and Technology 51, Nr. 2 (31.08.2023): 287–90. http://dx.doi.org/10.15258/sst.2023.51.2.12.

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Seed-enhancement treatments as a theme run through many of the papers in the second issue of volume 51 of Seed Science and Technology: the uses of priming are explored in two papers, one of which compares agents with the potential to improve chilling tolerance of tobacco seed during germination, and the other suggests Pseudomonas fluorescens and Bacillus amyloliquefaciens as forms of biocontrol against Bacterial Fruit Blotch when priming melon seeds. Dormancy-breaking is essential for many species, and two papers proffer suggestions that can be applied to seeds of cucumber (dry heat) and to kala zeera (chilling, phytohormones). A lesser- utilised seed enhancement, that of plasma pre-treatments, is explored in terms of promoting seedling growth and development when applied to seeds of a popular horticultural species, Platycodon grandiflorus. Cautionary notes when following approved seed testing methods are sounded in a finding that the impact of variety complicates the interpretation of results when using the radicle emergence test to evaluate seed quality of wheat, and in a report of the results of a capacity-building exercise, where the correlation between skill levels and successful propagation of Melia volkensii seeds was evident. Useful SSR markers for assessing genetic similarity and degree of purity of wheat cultivars grown in Romania are suggested, as too is an approach to using germination and/or viability data in order to allow seed banks to make data-informed management decisions that would ensure time and resources are effectively allocated. An invited review gives a thorough and comprehensive review of all matters relating to the determination and control of seed moisture, and includes discussions on water activity and working with seed that needs to be at high moisture contents. A book review of ”Plant Regeneration from Seeds: A Global Warming Perspective ”strikes a positive note, concluding that it will leave readers with ”a deep appreciation for the complex interplay of factors that influence plant regeneration and the potential consequences for ecosystems around the world ”.

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Tay*, David. „Seed Technology in Plant Germplasm Conservation“. HortScience 39, Nr. 4 (Juli 2004): 753B—753. http://dx.doi.org/10.21273/hortsci.39.4.753b.

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In plant germplasm conservation, “orthodox” seed (i.e. seed that survives drying down to low moisture content) is the most suitable propagule for long-term storage. In general, high quality seeds of around 5% seed moisture content can be stored for 5-15 years at 2°C and 15-50 years at -18°C. Globally, there are some 1,300 genebanks and 6.1 million accessions of food and industrial crops in conservation. When collecting and conserving plant germplasm, seed science and technology have to be applied during germplasm collection; seed regeneration-germination, seedling establishment, flower synchronization, pollination, harvesting, drying, processing and packaging; seed storage and conservation; characterization and evaluation; and finally, distribution. Some of the seed science knowledge and technology skills encompass seed sampling strategy, sample size, seed health, germination and vigor testing, dormancy breaking, scarification, stratification, vernalization, photoperiod treatment, isolation and pollination techniques, harvesting, threshing, drying, hermetic packaging, storage facility design, etc. The goal is to produce seed lots that fulfill the required genetic, physical, physiological and health quality. A summary was presented to relate germplasm conservation activities to seed science and technology. Some of the seed production, processing and testing equipment used were highlighted. Seed research in germplasm conservation is therefore crucial to streamline the operation and management of a genebank to make it more cost effective and attractive for funding.

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McKersie, Bryan D. „Principles of seed science and technology“. Plant Science 162, Nr. 5 (Mai 2002): 849. http://dx.doi.org/10.1016/s0168-9452(02)00011-0.

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Cantliffe, Daniel J. „Handbook of Seed Science and Technology“. HortScience 42, Nr. 2 (April 2007): 422a. http://dx.doi.org/10.21273/hortsci.42.2.422a.

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Schmid, Rudolf, und Amarjit S. Basra. „Handbook of Seed Science and Technology“. Taxon 55, Nr. 4 (01.11.2006): 1071. http://dx.doi.org/10.2307/25065722.

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Hernández Cortés, José Antonio. „Seed Science Research: Global Trends in Seed Biology and Technology“. Seeds 1, Nr. 1 (09.10.2021): 1–4. http://dx.doi.org/10.3390/seeds1010001.

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Taylor, Alan G., Masoume Amirkhani und Hank Hill. „Modern Seed Technology“. Agriculture 11, Nr. 7 (06.07.2021): 630. http://dx.doi.org/10.3390/agriculture11070630.

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Marcos-Filho, Julio. „Seed Science and Technology. Volume 48 Issue 3 (2020)“. Seed Science and Technology 48, Nr. 3 (31.12.2020): 439–51. http://dx.doi.org/10.15258/sst.2020.48.3.12.

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The quality of a seed lot results from the interaction of attributes that determine its overall value for a specific purpose. Seed Science and Technology is a widely recognised journal first published in 1973 as a continuation of the Proceedings of the International Seed Testing Association (1921 to 1972). The Journal publishes original papers and articles comprising different aspects of seed production, processing, storage, testing, genetic conservation, habitat regeneration and reforestation programs, with both basic and applied topics on seed science. Seed quality represents a permanent focus of Seed Science and Technology and the articles published in this issue, with a predominant approach on physiological potential, genetic purity and seed enhancement, confirm this strong commitment The species covered by the articles in this issue represent important worldwide grain, forage and ornamental crops, but there are also species with local value, for environmental restoration and medicinal application.

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Baalbaki, Riad. „Seed Science and Technology. Volume 49 Issue 3 (2021)“. Seed Science and Technology 49, Nr. 3 (31.12.2021): 321–30. http://dx.doi.org/10.15258/sst.2021.49.3.11.

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This issue of Seed Science and Technology is a good reflection of the wide scope of the field of study. Species of interest include major cultivated crops as well as wild and native species. Likewise, research topics span a wide array of subjects relevant to those interested in basic seed biology, production, testing, ecology, conservation and biodiversity. Understanding basic mechanisms of seed dormancy and germination remains a major topic of interest. Seed quality and its attributes are also of particular interest, as evidenced by research articles on seed vigour, health, genetic purity and physical characterisation.

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Dissertationen zum Thema "Seed Science and Technology"

Tamang, Deepa. „Enhancement of seed vigour and viability of aromatic rice by using chemicals under climatic conditions of Darjeeling Hills“. Thesis, University of North Bengal, 2022. http://ir.nbu.ac.in/handle/123456789/4810.

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Thyagarajan, Palaniappan. „Evaluation and optimization of cranberry seed oil extraction methods“. Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110762.

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Cranberry seed oil is a fine quality oil which can be marketed for its many beneficial functions to human health due to the presence of a unique combination of omega- 3, 6 and 9 fatty acids and the high concentration of antioxidants. Although there is no available clear data about the oil percentage of cranberry seeds in literature, an experiment was done to analyze the oil yields obtained through different processes such as heat reflux, microwave and ultrasound, both quantitatively and qualitatively. During preliminary experiments, better oil yields were obtained with ground seeds (10.11 ± 0.2%) in comparison with unground seeds (8.17 ± 0.3%) , and hence the seeds were made into a fine powder using a blender and the fine powders were separated by sieve (1mm). Hexane (10.2 ± 0.2%) was also found to be more efficient in oil extraction than Hexane: Ethanol (7:3) (6.45 ± 0.1%). The oil extraction process was based on four major operating factors namely the sample/solvent ratio, temperature, time and applied power for the heat reflux, microwave and ultrasound extraction. The results showed that the oil yield increased with an increase in sample/solvent ratio at 10g/100ml of hexane, temperature of 70⁰C in heat reflux which provided an oil yield about 11.19 ± 0.1% while in the case of microwave, best conditions were for a sample/solvent ratio of 5g/30ml of hexane, power at 125W, which gave an oil yield of 24.15 ± 0.3% maintaining the temperature at 66⁰C. In comparison, with ultrasound extraction at a sample/ solvent ratio of 5g/30ml of hexane, and a power at 150W, the oil yield was 32.35 ± 0.3%. The best yield results obtained for the tested methods for extracting oil from seeds were found and compared as: Heat reflux < Microwave L'huile de graines de canneberges est une huile de qualité qui peut être mise en marché pour ses propriétés fonctionnelles "santé" issues de sa composition particulière en acides gras oméga 3, 6 et 9 et de sa forte concentration en antioxydants. Il existe peu ou pas d'information sur la teneur en huile de la graine de canneberge, cependant l'industrie alimentaire s'intéresse à l'extraction de cette huile, qu'elle effectue présentement par pressage à froid, malgré un faible rendement. Afin de palier à ce problème, une étude a débuté afin d'analyser les rendements en huile obtenus par différents procédés d'extraction dont l'ébullition à reflux, les microondes et les ultrasons. L'ébullition à reflux améliore l'extraction en améliorant la diffusion du solvant par la chaleur, tandis que dans le cas des microondes et des ultrasons, c'est plutôt la particularité des ondes qui influencent l'extraction. Les objectifs de cette recherche ont donc visé à obtenir de bons rendements en huile avec une forte teneur en α - tocophérol. Lors des essais préliminaires, de meilleurs rendements ont été obtenus avec des graines moulues (10.11 ± 0.2%) en comparaison avec des graines non moulues (8.17 ± 0.3%), ainsi tous les essais d'extraction ont par la suite été faits avec des graines finement moulues et tamisées (1mm). L'hexane (10.2 ± 0.2%) s' est avéré plus efficace pour l'extraction qu'un mélange d'hexane: éthanol (7:3) (6.45 ± 0.1%). L'étude de l'extraction de l'huile s'est concentrée sur quatre facteurs opérationnels soit le ratio d'échantillon/solvant, la température, le temps et la puissance appliquée pour l'ébullition à reflux, et l'extraction microonde et par ultrasons. Nos résultats ont démontré une augmentation du rendement en huile avec une augmentation du ratio échantillon/solvant à 10g/100 ml d'hexane, à une température de 70°C pour l' ébullition à reflux avec un rendement de 11.19 ± 0.1% tandis qu'avec l'extraction microonde, les meilleures conditions furent pour un ratio d'échantillon/solvant de 5g/30ml d'hexane, et une puissance de 125W, donnant une rendement en huile de 24.15 ± 0.3% à une température de 66⁰C. En comparaison, l'extraction ultrason, pour un ratio d'échantillon/solvant de 5g/30ml d'hexane, à une intensité de 150W, le rendement en huile a été de 32.35 ± 0.3%. Ainsi, les meilleurs résultats en terme de rendement en huile pour les différentes méthodes d'extraction sont classés comme suit: Ébullition par reflux < Microonde < Ultrason. L'avantage de l'extraction par ultrasons fut son haut rendement en huile, pour un procédé rapide, à température peu élevée. Le rendement maximal en huile a été obtenu par l'extraction ultrason avec 1.61 g. L'analyse de la qualité de l'huile, en particulier la teneur en α - tocophérol a été effectuée par spectrophotométrie à 520 nm et les résultats ont démontrés que la teneur en α - tocophérol était grandement affectée par la température, à 70⁰C dans le cas de l'ébullition par reflux avec 0.266 ± 0.02 µg, tandis qu'avec l'extraction microonde à la puissance de 125W au ratio de 5g/30ml d'hexane, la teneur en tocophérol était de 0.346 ± 0.007 µg, tandis que pour les ultrasons, la teneur en tocophérol était de 0.428 ± 0.01 µg pour une puissance de 100W. L'extraction par solvant, jumelée avec les microondes ou les ultrasons, libère une plus grande concentration en α - tocophérol des cellules de la plante en comparaison avec la pression à froid. En conclusion, l'extraction par pression à froid obtient une huile de meilleure qualité que l'huile obtenue par ébullition par reflux, tandis que l'extraction par microondes et par ultrasons est fortement recommandée pour un meilleur rendement en huile et une plus haute teneur en tocophérol.

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Clements, Megan Alexander. „Almond Seed Coat, Surface Area, and Kinetics of Removal via Blanching“. Thesis, University of California, Davis, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3565492.

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This research aims to provide a more complete understanding of almond seed coats, including microscopic development and structure, the relationship of measurable properties to surface area, and the kinetics of seed coat separation from the underlying almond kernel in response to a range of temperatures.

Immature almond samples of Nonpareil and Padre varieties were microscopically examined in the 16th-20th weeks after flowering (13 through 7 weeks prior to commercial harvest). The highly vacuolate and thin-walled diploid maternal tissues and triploid support tissue that sustain the embryo during development begin to rupture and compress down above a base monolayer of distinctly intact cells to form the mature seed coat. Over the course of blanching, no substantial swelling or dissolution of microscopic tissue layers was visible, however the junction between the base layer of the seed coat and the underlying almond cotyledon moved apart until they were no longer in contact with one another.

Surface areas of Nonpareil, Monterey, and Butte-Padre almonds were measured by manually peeling rehydrated nuts and analyzing images of their seed coats. Ninety-five percent of the 1,545 almonds measured in this study had surface areas between 515.96 mm²-942.24 mm². Surprisingly, individual dimensions (length, width, and thickness) did not increase with increasing surface area, nor they did scale in proportion to one other. An empirical model was created to predict surface area (r²=0.74), which depends on the almond variety, as well as length, width, and mass after rehydration.

The progression of blanching was examined by quantifying the degree of seed coat separation at dozens of intermediate time-points during the blanching process, using this empirical model. Experimental temperatures were 70°C, 80°C, 90°C, and 100°C; at each temperature, seed coat separation occurred in a sigmoidal logarithmic fashion. Rates of blanching were calculated using non-linear two-parametric regression. Rates of blanching at 100°C and 90°C were not significantly different, however, blanching rates decreased semi-logarithmically with decreasing blanching temperature between 70°C and 90°C. D-values representing 90% seed coat separation were calculated as 30 seconds at 100°C, 35 seconds at 90°C, 120 seconds at 80°C, and 443 seconds at 70°C. From these, a z value for decimal reduction times between 70°C and 90°C was calculated at 18.48C degrees.

The novel empirical model for surface area could be used to improve the accuracy of mass transfer and energetic transfer calculations in almond processing. Quantifying the rate of seed coat separation could be used to explore any aspect of almond physiology dependent on or resultant from seed coat integrity, such as germination, rehydration kinetics, processing damage, or blanching efficacy. It could also potentially be used to compare the relative blanching propensity of different almond varieties, as well as evaluating the impact on skin separation of various growing, harvesting, and processing conditions. D- and z values characterizing the almond blanching process may be useful in optimizing almond processing conditions to reduce the chances of accidental seed coat separation, or to more efficiently achieve it.

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Thacker, Mitchell Grant. „Use of Flash Flaming Technology to Improve Seed Handling and Delivery of Winterfat (Krascheninnikovia lanata)“. BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/8928.

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Ecological restoration of rangelands using wild-collected seeds can be challenging due to low seed quality, inconvenient seed anatomy, and poor plant establishment. In North America, the half-shrub winterfat (Krascheninnikovia lanata) is a valuable protein-rich forage for wildlife and livestock. Seeds of this species are contained in one-seeded fruits enclosed in four fluffy, silky bracts. While the seeds can be removed from the bracts, it is not recommended as the bracts are thought to help protect the seed and aid in germination and seedling growth. However, bracts of winterfat make it difficult to incorporate this species within a seed mix because it prevents the seed from flowing through mechanized seeders. The anatomy of winterfat fruit also makes it difficult to treat this species with external seed coating materials that may aid in direct seeding efforts. We tested the use of a recently developed flash flaming technique in combination with seed coating to improve the flowability of winterfat fruits. Our results indicate that flash flaming can reduce the appendages on winterfat fruits, which decreased fruit volume by up to 46% without impacting seed germination. Flash flaming also makes it possible to incorporate a polymer seed coating to the exterior of winterfat fruits. We found that flash flaming combined with seed coating improved the flowability of winterfat fruits, as measured with standard laboratory tests, and by delivering fruits through a broadcast seeder and a rangeland drill. These results indicate that flash flaming plus seed coating provides a new technology that will allow for the treating and planting of winterfat on degraded rangelands.

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Richardson, William Charles. „Improving Post-Wildfire Seeding Success using Germination Modeling and Seed Enhancement Technologies“. BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6783.

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Arid and semi-arid rangelands are important ecosystems that are consistently degraded through disturbances such as wildfires. After such disturbances, the invasion and dominance of annual grasses, like cheatgrass (Bromus tectorum L.), can lead to an overall loss of ecosystem productivity and an increase in fire frequency. To reduce weed dominance, native and introduced perennials species are typically be seeded in the fall. High mortality is seen from these seeded plant communities due to germinated seed being exposed to freezing, drought, fungal pathogens, and other biotic and abiotic stressors during winter months. We utilized wet-thermal accumulation models to first further validate the theory that germination from seeded plant populations occurs during periods of high environmental stress, and then to establish the practicality of abscisic acid seed coatings as a technology that could circumvent winter germination and mortality. In Chapter 1, we developed an excel workbook called Auto-Germ using Visual Basic for Applications, which allows users to estimate field germination timing based on wet-thermal accumulation models and field data. We then used Auto-Germ to model seed germination timing for 10 different species, across 6 years, and 10 Artemisia-steppe sites in the Great Basin of North America. We estimated that for the majority of the species analyzed, a mid to late-winter planting was required on average for the majority of the population to germinate in the spring. This planting time would be logistically difficult for many land managers, due to freezing and/or saturated soil conditions. In Chapter 2, we utilized wet-thermal accumulation models to evaluate the use of abscisic acid (ABA) to delay germination of Pseudoroegneria spicata (Pursh) Á. Löve (perennial native bunchgrass) across 4 years and 6 Artemisia-steppe sites. Germination models estimated that ABA seed treatments typically would delay germination of fall sown seed to late winter or early spring when conditions may be more favorable for plant establishment. Based on these results, we recommend both the use of wetthermal accumulation models as a tool in educating researchers and land managers in knowing when seeding practices should occur, and the further study of ABA seed coatings as a technology that may improve plant establishment of fall sown seeds.

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Anderson, Ishmael Kwesi. „The relevance of science education: as seen by pupils in Ghanaian junior secondary schools“. Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_9863_1182745156.

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This thesis was based on a larger international comparative study called the ROSE (Relevance of Science Education) project. The study investigated the affective factors pupils perceive might be of relevance for the learning of science and technology using the ROSE survey questionnaire, and was aimed at providing data that might form part of an empirical basis for local adaptation of the science curriculum.

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Chang, Yu-Wei. „Isolation and characterization of protein fractions from chickpea («Cicer arietinum» L.) and oat («Avena sativa» L.) seeds using proteomic techniques“. Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=95049.

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Chickpea (Cicer arietinum L.) and oat (Avena sativa L.) seeds are important sources of protein ingredients with potential nutritional, functional and bioactive properties. Protein fractions were prepared from chickpea and oat using sequential extractions with distilled water (albumins), NaCl solution (globulins) and NaOH solution (glutelins), respectively. Molecular characteristics of individual protein fractions were investigated using polyacrylamide gel electrophoresis (Native- and SDS-PAGE, and 2-DGE) in combination with reversed-phase high performance liquid chromatography (RP-HPLC). Tryptic peptide sequences were identified using proteomic techniques including 1D trypsin in-gel digestion, liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) analysis and Mascot MS/MS ion search. Sequence similarity and potential bioactivity of proteins were examined using BLAST and BIOPEP analysis, respectively. Native-PAGE results showed chickpea and oat globulin fractions (C-Gb and O-Gb) contained proteins corresponding to legumin (11S) and avenalin (12S), respectively. SDS-PAGE revealed that chickpea albumin and globulin fractions (C-Ab and C-Gb) showed protein bands with MWs related to legumin (11S) and pea vicilin (7S) while chickpea glutelin fraction (C-Gt) showed protein bands with MWs related to rice glutelin; oat protein fractions (O-Ab, O-Gb and O-Gt) showed protein bands with MWs related to oat 12S globulin (avenalin). α- and β-subunits of globulin and glutelin fractions from chickpea and oat were identified with estimated MWs ranging from 31 to 45 kDa and from 21 to 31 kDa, respectively. In vitro chickpea albumin, globulin and glutelin hydrolysates showed DH of 22.8%, 28.6% and 28.8%, respectively; SDS-PAGE revealed that legumin α- and β-subunits from chickpea globulin fraction (C-Gb) were hydrolyzed. The identified tryptic peptides from chickpea and oat protein fractions showed sequence homology that corresponded to chickpea l
Les semences du pois chiche (Cicer arietinum L.) et de l'avoine (Avena sativa L.) sont d'importantes sources d'ingrédients protéiques dont les propriétés nutritionnelles, fonctionnelles et bioactives démontrent un grand potentiel. Les fractions protéiques ont été préparées à partir du pois chiche et de l'avoine par extraction séquentielle avec de l'eau distillée (albumine), une solution de NaCl (globuline) et une solution de NaOH (glutelines), respectivement. Les caractéristiques moléculaires des fractions de protéines individuelles ont été examinées par électrophorèse en gel de polyacrylamide (non dénaturante et SDS-PAGE, et 2-DGE) en combinaison avec la chromatographie en phase liquide à haute performance en phase inversée. Les séquences de peptides tryptiques ont été identifiées par des techniques protéomiques telles que la digestion de trypsine en gel unidimensionnelle, l'analyse chromatographique en phase liquide couplée à la spectrométrie de masse en tandem avec ionisation de type électrospray (LC-ESI-MS/MS), et la recherche d'ions MS/MS (Mascot). Les similarités séquentielles et la bioactivité potentielle des protéines ont été examinées sous analyse par BLAST et BIOPEP, respectivement. Les résultats de l'électrophorèse non dénaturante en gel de polyacrylamide démontrent que les fractions de globulines du pois chiche et d'avoine (C-Gb et O-Gb) contiennent des protéines correspondant aux légumines (11S) et avenaline (12S), respectivement. La SDS-PAGE révèle que les fractions d'albumine et de globuline de pois chiche (C-Ab et C-Gb) montrent des bandes protéiques ayant des poids moléculaires reliés à la légumine (11S) et le viciline de pois (7S) alors que la fraction de glutéline de pois chiche (C-Gt) montre des bandes protéiques avec des poids moléculaires reliés à la glutéline de riz; les fractions protéiques d'avoine (O-Ab, O-Gb et O-Gt) montrent de bandes protéiques avec des poids moléculaire

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Spada, Roberta. „The second quantum revolution: designing a teaching-learning activity on the quantum manifesto to futurize science education“. Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18360/.

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Questa tesi è la conclusione di un lavoro all’interno di I SEE (Inclusive STEM Education to Enhance the capacity to aspire and imagine future careers), un progetto europeo Erasmus+ coordinato dall’Università di Bologna e che coinvolge altri sei partner (http://iseeproject.eu). Il mio lavoro ha portato allo sviluppo di un’attività didattica intitolata “Applicazioni e implicazioni dei computer quantistici nella società” che è parte di un modulo I SEE sui computer quantistici. Progetto e attività mirano a contribuite a due dibattiti nella ricerca sull’educazione scientifica: quello sulla didattica STEM e sulla sua posizione in contesti di ricerca, istituzionali e didattici; quello sulla percezione del futuro da parte dei giovani in questo mondo in accelerazione. Il primo capitolo riguarda lo stato dell’arte del dibattito sulla didattica STEM, da un punto di vista sia di ricerca che istituzionale, come modo di affrontare temi chiave che riguardano il rapporto problematico tra scienza e società. Nel secondo capitolo, viene presentato il progetto I SEE e collocato all’interno della ricerca nella didattica STEM. È fornita una descrizione di come tale progetto contribuisce a promuovere lo sviluppo delle cosiddette future-scaffolding skills e a disegnare un approccio STEM integrato, con una descrizione dei moduli finlandese e italiano sulle tecnologie quantistiche. Il terzo capitolo include la descrizione dell’attività che ho contribuito a sviluppare. Essa è stata costruita per raggiungere diversi obiettivi tra cui guidare gli studenti di scuola secondaria a familiarizzare con la terminologia, le prospettive e i contenuti di documenti istituzionali come il Quantum Manifesto, e rendersi conto delle tante dimensioni coinvolte, riconoscendo dove e come le tecnologie quantistiche potranno essere d’impatto nella vita del singolo. Infine, si discutono i risultati dell’implementazione dell’attività avvenuta a Bologna nel febbraio 2019 con 25 studenti di scuola secondaria.

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Li, Yingzhu. „Development of immersive and interactive virtual reality environment for two-player table tennis“. Thesis, University of Central Lancashire, 2012. http://clok.uclan.ac.uk/5316/.

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Although the history of Virtual Reality (VR) is only about half a century old, all kinds of technologies in the VR field are developing rapidly. VR is a computer generated simulation that replaces or augments the real world by various media. In a VR environment, participants have a perception of “presence”, which can be described by the sense of immersion and intuitive interaction. One of the major VR applications is in the field of sports, in which a life-like sports environment is simulated, and the body actions of players can be tracked and represented by using VR tracking and visualisation technology. In the entertainment field, exergaming that merges video game with physical exercise activities by employing tracking or even 3D display technology can be considered as a small scale VR. For the research presented in this thesis, a novel realistic real-time table tennis game combining immersive, interactive and competitive features is developed. The implemented system integrates the InterSense tracking system, SwissRanger 3D camera and a three-wall rear projection stereoscopic screen. The Intersense tracking system is based on ultrasonic and inertia sensing techniques which provide fast and accurate 6-DOF (i.e. six degrees of freedom) tracking information of four trackers. Two trackers are placed on the two players’ heads to provide the players’ viewing positions. The other two trackers are held by players as the racquets. The SwissRanger 3D camera is mounted on top of the screen to capture the player’s

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Benzel, Katie Rebecca. „Defoliation effects on Spotted Knapweed seed production and viability“. Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/benzel/BenzelK0508.pdf.

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Spotted knapweed (Centaurea stoebe L.) is a deeply taprooted perennial forb infesting millions of hectares of rangeland in western North America. Spotted knapweed forms large monocultures, which lowers plant diversity, reduces livestock and wildlife forage, and increases surface water runoff and sediment yield. It can produce 5,000-40,000 seeds m-2 year-1, and often produces new flowers after prescribed sheep grazing or mowing defoliates spotted knapweed plants during the bolting or flowering stage. Research has yet to determine if new flowers produced following spring/summer defoliation produce viable seeds by the end of the growing season. The purpose of this 2-year study was to determine the appropriate timing(s) or combination(s) of timings of defoliation on spotted knapweed to reduce viable seed production. Ten spotted knapweed plants, located on spotted knapweed-infested rangeland in west-central Montana, were hand-clipped for each of the following treatments: 1) 35-40% relative utilization of above-ground biomass when plants were in the bolting stage; 2) 100% of buds removed at late-bud/early-flowering stage; 3) 100% of flowers removed at full-flowering stage; 4) Treatment 1+Treatment 2; 5) Treatment 1+Treatment 3; 6) Treatment 2+Treatment 3; 7) Treatment 1+Treatment 2+Treatment 3; and 8) unclipped control. The number of buds/flowerheads per plant, number of seeds per plant, percent viability of seeds, and number of viable seeds per plant were determined when seeds were in the well-developed stage, but seedhead bracts were still tightly closed (mid-August through September). Clipping at any timing or combination of timings reduced the number of buds/flowerheads per plant (P < 0.01), number of seeds per plant (P < 0.01), percent viability of seeds (P < 0.01), and number of viable seeds per plant (P < 0.01) both years compared with the unclipped control. Clipping during the bolting stage reduced the number of viable seeds by nearly 90% compared with no clipping. Clipping during the late-bud/early-flower or full-flower stage reduced the number of viable seeds by nearly 100% compared with no clipping. Defoliation of spotted knapweed via prescribed sheep grazing or mowing in summer should effectively suppress viable seed production of spotted knapweed.

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Bücher zum Thema "Seed Science and Technology"

Copeland, Lawrence O. Seed science and technology. 3. Aufl. London: Chapman & Hall, 1995.

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Dadlani, Malavika, und Devendra K. Yadava, Hrsg. Seed Science and Technology. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5888-5.

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S, Basra Amarjit, Hrsg. Handbook of seed science and technology. New York: Food Products Press, 2005.

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Copeland, Larry O., und Miller B. McDonald. Principles of Seed Science and Technology. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2.

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Copeland, Lawrence O., und Miller B. McDonald. Principles of Seed Science and Technology. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1619-4.

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B, McDonald M., Hrsg. Principles of seed science and technology. 2. Aufl. Minneapolis, Minn: Burgess Pub. Co., 1985.

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Anzola, M. Constanza. Thesaurus on seed science and technology. [Cali, Colombia]: Centro Internacional de Agricultura Tropical, Seed Unit, 1986.

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Copeland, Lawrence O. Principles of Seed Science and Technology. 4. Aufl. Boston, MA: Springer US, 2001.

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B, McDonald M., Hrsg. Principles of seed science and technology. 3. Aufl. New York, N.Y: Chapman & Hall, 1995.

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B, McDonald M., Hrsg. Principles of seed science and technology. 4. Aufl. Boston: Kluwer Academic Publishers, 2001.

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Buchteile zum Thema "Seed Science and Technology"

Chakrabarty, Shyamal K., Sudipta Basu und W. Schipprach. „Hybrid Seed Production Technology“. In Seed Science and Technology, 173–212. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5888-5_9.

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AbstractHybrid technology, harnessing the advantage of heterosis between two diverse genotypes to achieve maximum hybrid vigour, is widely recognized and commercially used for crop variety improvement both in field and vegetable crops. Hybrids can be developed using appropriate technology, irrespective of the mating and pollination system in the plant species. Production of hybrid seed depends on plant, pollinator and environmental factors, which influence it individually or in interactive ways. Hence, an understanding of these components is important to undertake hybrid seed production of a given crop species. The basic requirements for hybrid seed production at a commercial scale are (a) a unisexual flower or a bisexual flower with sterile pollen in anther or self-incompatible flower/plant; or pistillateness; or large conspicuous bisexual flowers for easy emasculation of flowers in plants to be used as the female parent and (b) abundant pollen production, dispersal and its easy transfer from the male parent to the female parent for satisfactory seed setting. These are dependent on floral biology, flower features, mode of pollination and reproduction of the crop species. Agronomic crop management with scientific insights is equally important for successful hybrid seed production. These are discussed in this chapter with appropriate examples.

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Pandita, Vinod K., P. M. Singh und Nakul Gupta. „Vegetable Seed Production“. In Seed Science and Technology, 133–52. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5888-5_7.

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AbstractUnlike field crops where the cultural practices of raising seed crops are mostly similar to the commercial crops, in case of the vegetables, not only the seed crops are grown for a much longer duration than the crops raised for the vegetable purpose, they often also have critical requirements of photoperiods, temperatures, humidity and precipitation. Moreover, compared to field crops, most of vegetable seeds are considered high value and low volume, and hence these require specific care in pre-harvest stages, i.e. isolation and roguing, during harvesting and extraction, and post-harvest operations such as drying, processing, packaging and storage. Due to their vast diversity in growth pattern, induction of flowering and pollination behaviour, seed production procedures need to be followed for each group, e.g. cole crops, cucurbits, leafy vegetables, root crops, solanaceous, malvaceous crops, etc. General principles and standard practices in vegetable seed production are provided in this chapter.

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Weissmann, Elmar A., K. Raja, Arnab Gupta, Manish Patel und Alexander Buehler. „Seed Quality Enhancement“. In Seed Science and Technology, 391–414. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5888-5_16.

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AbstractWith the expansion of precision and intensive agriculture, seed quality, which alone could contribute up to 15–20 per cent in terms of crop productivity, has assumed greater importance. Every care is taken not only to produce high-quality seeds and maintain the same through various stages of production, from growing conditions of the seed crop to pre-harvest, harvest, processing and storage activities, but also to adopt certain technologies to further improve the performance of seeds upon sowing of the crop under a wide range of environments. These technologies, collectively known as ‘enhancement’, cover a variety of methods applicable to different crop species and aimed at meeting specific requirements, such as unfavourable growing conditions of hard/acidic/sodic soil, high or low temperature, excess or deficient rainfall, etc., as well as the stress imposed by the presence of pests and diseases that affect crop performance, particularly during the early vegetative stage resulting in poor seed emergence, crop establishment and vegetative growth. Selection of the appropriate and cost-effective technologies is important in accruing the best results from seed enhancement.

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Copeland, Larry O., und Miller B. McDonald. „Seed Enhancements“. In Principles of Seed Science and Technology, 258–76. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2_11.

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Copeland, Larry O., und Miller B. McDonald. „Seed Certification“. In Principles of Seed Science and Technology, 277–95. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2_12.

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Copeland, Larry O., und Miller B. McDonald. „Seed Testing“. In Principles of Seed Science and Technology, 296–325. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2_13.

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Copeland, Larry O., und Miller B. McDonald. „Seed Marketing“. In Principles of Seed Science and Technology, 352–61. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2_15.

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Copeland, Larry O., und Miller B. McDonald. „Seed Germination“. In Principles of Seed Science and Technology, 59–110. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2_4.

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Copeland, Larry O., und Miller B. McDonald. „Seed Dormancy“. In Principles of Seed Science and Technology, 127–52. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2_6.

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Copeland, Larry O., und Miller B. McDonald. „Seed Production“. In Principles of Seed Science and Technology, 221–41. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2_9.

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Konferenzberichte zum Thema "Seed Science and Technology"

Jantianus, E. E. Surbakti, R. W. Sembiring, P. Silaen und Khairul. „Implementation Weighted Product Method for the Best Carrot Seed Recommendations“. In International Conference on Applied Science and Technology on Engineering Science. SCITEPRESS - Science and Technology Publications, 2021. http://dx.doi.org/10.5220/0010954100003260.

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Zhang, Yangguang, Qi Chen, Ji Shen, Qihao Shi und Can Wang. „Adaptive Seed Minimization for Diversified Influence Maximization“. In 2022 5th International Conference on Data Science and Information Technology (DSIT). IEEE, 2022. http://dx.doi.org/10.1109/dsit55514.2022.9943966.

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Lam, Steve T., Robert J. Marks II und Paul S. Cho. „Three-dimensional Seed Reconstruction in Prostate Brachytherapy Using Hough Transformations“. In International Symposium on Optical Science and Technology, herausgegeben von Andrew G. Tescher. SPIE, 2002. http://dx.doi.org/10.1117/12.456521.

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Darmayanti, Agung S., Esti E. Ariyanti, Ilham K. Abywijaya, Melisnawati H. Angio und Dewi Lestari. „Seed exploration in Meru Betiri National Park and its conservation in seed bank of Purwodadi Botanic Garden, East Java, Indonesia“. In THE 4TH INTERNATIONAL CONFERENCE ON LIFE SCIENCE AND TECHNOLOGY (ICoLiST). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0112781.

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Pradeep, Sankeerth, B. S. Vinay, Tenzin Thinlay, Bharath Shyam und C. H. Patel. „Development of seed sowing robot using shrimp mechanism“. In 1ST INTERNATIONAL CONFERENCE ON ADVANCES IN MATERIAL SCIENCE AND TECHNOLOGY: ICAMST2022. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0192317.

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Mekel, Alfred, und Tineke Saroinsong. „Control System in Crusher and Sorting Nutmeg Seed Machine based on Arduino Uno“. In International Conference on Applied Science and Technology on Engineering Science. SCITEPRESS - Science and Technology Publications, 2021. http://dx.doi.org/10.5220/0010966200003260.

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Li, Hui, Chengjun Zou und Xuliang Duan. „Research progress of crop seed quality detection based on spectral imaging technology“. In Eighth International Conference on Electronic Technology and Information Science (ICETIS 2023), herausgegeben von Hu Sheng und Huajun Dong. SPIE, 2023. http://dx.doi.org/10.1117/12.2682450.

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Kummara, Harikrishna, Sai Ajay Enagandula, Hari Teja Mallisetty und Chetan Hanumanthappa Patel. „Design and fabrication of multi-tool seed sowing machine“. In 1ST INTERNATIONAL CONFERENCE ON ADVANCES IN MATERIAL SCIENCE AND TECHNOLOGY: ICAMST2022. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0195201.

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Setiawan, Herlan, Daya Agung Sarwono, Moch Subechi, Anung Pujiyanto, Mujinah Mujinah, Dede Kurniasih und Witarti Witarti. „Preparation and characterization of Samarium-153 bioceramics for seed brachytherapy“. In INTERNATIONAL CONFERENCE ON NUCLEAR SCIENCE, TECHNOLOGY, AND APPLICATIONS – ICONSTA 2022. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0192960.

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Shin, Youngjoo, Dongyoung Koo, Joobeom Yun und Junbeom Hur. „SEED: Enabling Serverless and Efficient Encrypted Deduplication for Cloud Storage“. In 2016 IEEE International Conference on Cloud Computing Technology and Science (CloudCom). IEEE, 2016. http://dx.doi.org/10.1109/cloudcom.2016.0084.

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Berichte der Organisationen zum Thema "Seed Science and Technology"

Mahat, Marian, Guy Morrow, Brian Long, Siew Fang Law, Amy Gullickson und Chengxin Guo. Developing an impact framework for Science Gallery Network: Final report. University of Melbourne, 2022. http://dx.doi.org/10.46580/124372.

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The aim of this project was to develop an impact framework for the Science Gallery Network (SGN). This work was commissioned by the Science Gallery International (SGI). The SGN has eight member organisations across four continents: Dublin, London, Melbourne, Bengaluru, Detroit, Rotterdam, Atlanta and Berlin. Whilst the network consistently sees unprecedented levels of accomplishment by its members, a testimony to their capacity, innovation and vision, the SGN does not have a systematic way to measure and monitor this impact. An impact framework that can assist with understanding and reporting the value of this impact will provide important recognition that the SGN has achieved what it sets out to do— bringing science, art, technology and design together to deliver world-class educational and cultural experiences for young people. This report details the robust consultation approach that was undertaken by the University of Melbourne’s project team—one that included a desktop review, focus group discussions, surveys and interviews—to ensure multiple perspectives were gathered on what could be considered a multi-faceted concept. The desktop review provided a thorough review and an environmental scan of the impact literature and its measurement. In addition, the focus group discussions and interviews provided a rich understanding of what ‘good impact’ means for the SGN and the implications of this to the measurement of impact outcomes. Five key recommendations are provided and summarised. Note that these key recommendations should be taken as a point of departure for further in-depth consultation throughout the wider SGN.

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Kelsey, Tom. When Missions Fail: Lessons in ‘High Technology’ From Post-War Britain. Blavatnik School of Government, Dezember 2023. http://dx.doi.org/10.35489/bsg-wp_2023/056.

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The idea that national security and economic prosperity stem from being at the technological frontier (‘techno-nationalism’) is once again a dominant feature of global politics. The post-war United States has emerged as the key model in these discussions, with the ‘moonshot’ seen as an outstanding example of how to direct state resources towards technological breakthroughs, while the capacity of the American government is praised more generally for its ability to sponsor ground-breaking technology. This paper, however, suggests that the United States was the exception, not the rule, and that the failures of post-war Britain highlight the limitations of ‘techno-nationalism’ with vivid clarity. During the 1950s and 1960s, the British state took long-term bets on securing a leading role in the world’s technological future, specifically in the areas of supersonic flight via Concorde and nuclear power generation. The result, however, was not export glory but industrial calamity. These long-running programmes were eventually cut back in the 1970s, when it became accepted in Whitehall that Britain should no longer try to be the Science and Tech Superpower, attempting to leapfrog the United States to technological glory. Understanding this trajectory in Britain dislodges the sense that focusing on emerging technology and the long term is a silver bullet in policymaking. We must appreciate that the realities of technological power matter, and grasp that the post-war US was an unrepresentative case: no country today will have the relative level of industrial and technological might that it enjoyed at that time. While my arguments will resonate in other national contexts, my focus is on ensuring that any strategy for ‘high technology’ in the UK today continues to learn the lessons from the errors of the post-war period. It must be wary of expert capture within the state. It must also think about industrial strategy in an integrated way, across national security, economics, and foreign policy, with a policymaking machinery set up to deal with this level of complexity. Moreover, despite the attention afforded to national state funding, the UK should continue to see forging alliances as essential alongside working with international business and be clear-eyed about where it does and does not need to sustain national capabilities.

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Bonner, F. T., James A. Vozzo, W. W. Elam und S. B. Land. Tree Seed Technology Training Course. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station, 1994. http://dx.doi.org/10.2737/so-gtr-107.

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Bonner, F. T., John A. Vozzo, W. W. Elam und S. B. Land. Tree Seed Technology Training Course - Instructor's Manual. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station, 1994. http://dx.doi.org/10.2737/so-gtr-106.

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Bonner, F. T., und John A. Vozzo. Seed Biology and Technology of Quercus. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station, 1987. http://dx.doi.org/10.2737/so-gtr-66.

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Smith, B. F., N. Sauer, R. M. Chamberlin, S. Gottesfeld, B. R. Mattes, D. Q. Li und B. Swanson. Separation science and technology. Office of Scientific and Technical Information (OSTI), Dezember 1998. http://dx.doi.org/10.2172/307877.

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ENGLER, O., J. BINGERT und ET AL. TEXTURE SCIENCE AND TECHNOLOGY. Office of Scientific and Technical Information (OSTI), November 1999. http://dx.doi.org/10.2172/787262.

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Jones, Anita, und Larry Lynn. Defense Science and Technology. Fort Belvoir, VA: Defense Technical Information Center, Mai 2002. http://dx.doi.org/10.21236/ada403874.

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M. ABRAMS, R. BAKER und ET AL. CATALYSIS SCIENCE AND TECHNOLOGY. Office of Scientific and Technical Information (OSTI), August 2000. http://dx.doi.org/10.2172/768735.

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DEPARTMENT OF THE ARMY WASHINGTON DC. Army Science and Technology. Fort Belvoir, VA: Defense Technical Information Center, April 1998. http://dx.doi.org/10.21236/ada353425.

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