Relevant bibliographies by topics / Shoot tips

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Shoot tips'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Shoot tips"

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Ruan, Yiqin, and Mark H. Brand. "In Vitro Responses of Tissues from Rhododendron Plants With and Without Tissue Proliferation." HortScience 30, no. 4 (July 1995): 873D—873. http://dx.doi.org/10.21273/hortsci.30.4.873d.

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Rhododendron `Montego' shoot cultures initiated from plants with and without tissue proliferation (TP and NTP) served as explant sources for all studies (Note: in vitro TP shoot cultures produce primarily dwarf shoots, some long shoots, and stem tumors). Calli induced from TP leaves and tumors and NTP leaves were cultured on woody plant (WP) medium containing NAA and 2-iP. During the first 4 weeks of culture, calli from NTP leaves had higher relative growth rates than calli from TP leaves or tumors. However, calli from TP leaves and tumors grew faster than calli from NTP leaves for all subculture periods that followed. Shoot tips (5 mm) were excised from TP dwarf shoots, TP long shoots, and NTP shoots and were cultured on WP medium with or without 15 μM 2-iP. Shoot tips from TP dwarf and long shoots multiplied on medium without 2-iP, averaging 18.4 and 1.7 shoots per shoot tip in 12 weeks, respectively. Shoot tips from NTP shoots only multiplied when maintained on 2-iP-containing medium. When placed on 2-iP-containing medium, both types of TP shoot tips produced clusters of callus-like nodules that gave rise to highly tumorized, short shoots or leafy meristems.
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Fukai, Seiichi. "Cryopreservation of chrysanthemum shoot tips." Scientia Horticulturae 45, no. 1-2 (December 1990): 167–74. http://dx.doi.org/10.1016/0304-4238(90)90079-t.

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Dahniya, M. T., S. K. Hahn, and C. O. Oputa. "Effect of Shoot Removal on Shoot and Root Yields of Sweet Potato." Experimental Agriculture 21, no. 2 (April 1985): 183–86. http://dx.doi.org/10.1017/s0014479700012461.

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SUMMARYExperiments on harvesting sweet potato as a green vegetable and as a root crop are described. Whole shoots yielded 62% more than shoot tips. Similar total shoot yields were harvested whether tip removal was at two, three or four week intervals. Root yield was decreased by 31 to 48% by removing shoot tips, while removing whole shoots led to root yield decreases of 48 to 62%. Harvesting shoots at two week intervals gave 72% reduction in root yield, compared with 50% with four week intervals. There were fewer and smaller tubers as the frequency of shoot harvests increased. There were varietal differences in response to shoot removal For reasonable yields of both shoot tips and tuberous roots harvesting shoot tips at four week intervals is recommended.
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Kozak, Danuta, Marzena Parzymies, Alicja Świstowska, Barbara Marcinek, and Bairam Solomon Ismael. "The influence of explants type and orientation on growth and development of Mandevilla sanderi (Hemsl.) Woodson in vitro." Acta Scientiarum Polonorum Hortorum Cultus 18, no. 4 (August 7, 2019): 111–19. http://dx.doi.org/10.24326/asphc.2019.4.10.

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Mandevilla sanderi is an important commercial ornamental pot plant. Traditional vegetative propagation is limited due to the low rate, therefore there is a need to develop an alternative, more efficient method. There is an interest in development of micropropagation technology for the species, as it allows to obtain a lot of offsprings in a relatively short time. The aim of the present work was to estimate an influence of explants type and position on regeneration of Mandevilla sanderi in tissue culture. Four different types of explants (leafy shoot tips, decapitated leafy shoot tips, defoliated shoot tips, decapitated and defoliated shoot tips) were used in the experiment, which were placed on the media vertically, while defoliated shoot tips were placed horizontally or vertically upside down. The explants were cultivated on a Murashige and Skoog (MS) medium supplemented with 1 mg·dm–3 benzyladenine (BA) and 0.5 mg·dm–3 indole-3-butyric acid (IBA). It was noted that both explants orientation and positioning, influenced the multiplication rate. Defoliated shoot tips placed horizontally were characterized by higher multiplication rate (6.8) in comparison to upside down vertical positioning (3.2). It was also observed that removal of shoot apex improved axillary branching, while defoliation of shoots placed in a normal position reduced multiplication rate.
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Yadava, U. L., and S. K. Dhir. "In Vitro Regeneration of Trichosanthes from Shoot Tips." HortScience 30, no. 4 (July 1995): 871C—871. http://dx.doi.org/10.21273/hortsci.30.4.871c.

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The morphogenetic potential of parval or pointed gourd (Trichosanthes dioica Roxb.) shoot-tip explants was investigated to establish this species as a model tissue culture system. An effective multiple-shoot propagation method is described. Ten-millimeter shoot tips from young branches of greehouse-grown plants served as explants. They were initiated on a MS basal medium. Multiple shoots were encouraged by transferring established explants to a proliferation medium consisting of MSB + 1 mg BAP/liter, because lower concentrations of BAP (0.1 to 0.5 mg–liter–1) inhibited multiple shoot formation; however, the same concentrations promoted rooting in explants. Medium supplemented with 1 mg BAP/liter and 100 mg PVP/liter caused the best proliferation of shoot tips. Upon transferring to fresh medium of the same composition, these shoot tips elongated 24 cm with three to five nodes in 4 weeks of culturing. Shoot multiplication cultures were maintained by transferring segments of multiple-shoot clusters to medium containing 1 mg BAP/liter and 0.5 mg GA3/liter. Medium supplemented with TDZ inhibited the number of regenerating explants but enhanced the number of shoot buds. Eighty percent of these plantlets were successfully rooted on MS medium supplemented with 1 mg NAA/liter. Plantlets survived in potting soil and exhibited normal growth under mist in the greenhouse.
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Towill, Leigh E., and Gayle M. Volk. "(19) Cryopreservation of Arabidopsisthaliana Shoot Tips." HortScience 40, no. 4 (July 2005): 1067E—1067. http://dx.doi.org/10.21273/hortsci.40.4.1067e.

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Arabidopsisthaliana shoot tips provide a model to study processes important for cryopreservation. Cryopreservation was accomplished using both vitrification and two-step cooling methods. With vitrification methods, shoot formation after liquid nitrogen (LN) exposure was as high as 100% and 95% for shoot tips exposed to PVS2 at 0 °C and to PVS3 at 23 °C, respectively. A two-step cooling method also gave greater than 90% survival if shoot tips were cooled at 0.3 °C per minute to below –30 °C before immersing the samples into LN. The high levels of shoot formation after LN exposure in Arabidopsis thaliana shoot tips will allow the use of mutants to examine how alterations in biochemical, metabolic, and developmental processes affect survival and growth.
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Pennycooke, Joyce C., and Leigh E. Towill. "Cryopreservation of Sweetpotato Shoot Tips by Vitrification." HortScience 32, no. 3 (June 1997): 472B—472. http://dx.doi.org/10.21273/hortsci.32.3.472b.

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Cryopreservation offers the simplest and most economical way for the long-term conservation of germplasm and vitrification is the preferred method to accomplish this. Undefined endogenous compounds are produced during plant growth and shoot tip preculture conditions. These may influence “cryopreservability” and interact with cryoprotectants that are artificially added during the cryogenic protocol. We are beginning to examine these aspects to improve cryopreservation. Nodal segments of PI 296057 were propagated on a hormone-free modified Murashige and Skoog (MS) solid medium and were grown with 16 hr/8 hr photoperiod. Shoot tips were excised at 0, 3 or 10 hr in light after the dark period. Excised shoot tips were precultured in 0.06 M sucrose in MS for 24 hr and 0.3 M sucrose in MS for 24 hr and then treated with 0.4 M sucrose plus 2 M glycerol for 20 min or 1 hr before being dehydrated in PVS2 [30% (w/v) glycerol, 15% (w/v) ethylene glycol and 15% (w/v) dimethylsulfoxide in MS and 0.4 M sucrose[for 10, 16 or 26 min at 22°C. Shoot tips were placed on thin strips of aluminum foil, which were folded to enclose the shoot tips and then immersed in a liquid nitrogen (LN) slush. Rapid warming and dilution were achieved by transferring the foil strips from LN into 3 ml of 1.2 M sucrose at 22°C for 20 min. All cultures were incubated in darkness for 2 days then dim light for 3 days before transfer to the usual light intensity. Elimination of iron and nitrogen from MS medium in post thaw culture for 5 days increased the viability of LN-treated samples. Maximum survival after LN exposure was achieved with excision immediately after the dark photoperiod, cultured for 1 hr in 0.4 M sucrose plus 2 M glycerol and exposed for 16 min in 100% PVS2 at 22°C. Previously, Towill and Jarret (1992, Plant Cell Reports 11: 175–178) reported that surviving shoot tips developed callus and a variable percentage subsequently formed shoots. In this line all surviving shoot tips eventually formed shoots.
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Diettrich, B., P. Donath, A. S. Popov, R. G. Butenko, and M. Luckner. "Cryopreservation of Chamomilla recutita Shoot Tips." Biochemie und Physiologie der Pflanzen 186, no. 1 (January 1990): 63–67. http://dx.doi.org/10.1016/s0015-3796(11)80294-5.

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Hitmi, Adnane, Chantal Barthomeuf, and Huguette Sallanon. "Cryopreservation of Chrysanthemum cinerariaefolium Shoot Tips." Journal of Plant Physiology 156, no. 3 (March 2000): 408–12. http://dx.doi.org/10.1016/s0176-1617(00)80081-4.

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Hasan, M. F., and B. Sikdar. "In vitro Propagation of Polygonum hydropiper L. from Shoot Tips." Plant Tissue Culture and Biotechnology 20, no. 1 (August 30, 2010): 73–79. http://dx.doi.org/10.3329/ptcb.v20i1.5970.

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An efficient protocol for plant regeneration through multiple shoots induction from shoot tips of Polygonum hydropiper (L.) was established. The highest percentage (96.6) of multiple shoot induction and number of shoots (9.0) per culture were found on MS supplemented with 2.0 mg/l Kn. The induced shoots were excised and inoculated on to MS contains different concentrations of IBA or NAA for rooting. The highest percentage (90.0) of root induction and the highest number of roots per shoot (12.0) was found on MS having 1.0 mg/l IBA. Well rooted plantlets were acclimated properly and transplanted in the soil under natural condition, where cent per cent plantlets survived and grew successfully. Key words: Polygonum hydropiper, Shoot tips, In vitro propagation D.O.I. 10.3329/ptcb.v20i1.5970 Plant Tissue Cult. & Biotech. 20(1): 73-79, 2010 (June)
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Dissertations / Theses on the topic "Shoot tips"

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Stock, Johanna [Verfasser]. "Cellular stress responses during cryo-induced stress in Arabidopsis shoot tips / Johanna Stock." Halle, 2018. http://d-nb.info/1162892803/34.

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Kaczmarczyk, Anja. "Physiological, biochemical, histological and ultrastructural aspects of cryopreservation in meristematic tissue of potato shoot tips." Berlin Köster, 2008. http://d-nb.info/991906160/04.

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Pfister, Lucas Federico. "Effect of canopy management practices - hedging vs curling shoot tips - on growth, yield and fruit composition of Merlot grapevines." Master's thesis, ISA, 2011. http://hdl.handle.net/10400.5/8583.

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Mestrado Vinifera EuroMaster - Instituto Superior de Agronomia
A study to compare the effects of hedging and curling the shoot tips (rolling) on the last wire of the trellising system was carried out in Saint Emilion (France) on Merlot grapevines in 2011. Vines were hedged or curled when shoots were 30 – 40 cm longer than the highest wire. The effects of the two canopy management strategies on vine performance, mainly vegetative growth, disease occurrence, phenology, water status, yield components and berry composition were compared. Curled, not hedged vines presented longer main shoots, more lateral shoots and higher potassium values on the petioles. Hedged plants had a higher percentage of shaded clusters and a higher leaf layer number at the cluster zone and ¾ of the canopy. Regarding leaf area, curled plants presented a bigger main leaf area but for lateral leaf area no differences were found. Although berries on hedged plants were prone to have a higher mass, no differences for berry composition were found. Hedging seems to be an appropriated technique for the Sain Emilion region as it is less time consuming, less expensive, possible to be mechanized and it has no detriment regarding quality of berries
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Edesi, J. (Jaanika). "The effect of light spectral quality on cryopreservation success of potato (Solanum tuberosum L.) shoot tips in vitro." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526219219.

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Abstract Cryopreservation enables storage of genetic resources at ultra-low temperatures (<-150°C) while maintaining viability and regeneration capability. The method is especially suitable for long-term preservation of plant materials that cannot be stored as seeds. The genetic resources of potato (Solanum tuberosum L.), one of the most important food crops in the world, are preserved almost entirely by vegetative preservation. Cryopreservation is therefore increasingly applied for securing potato genetic resources in plant genebanks. A major challenge is, however, that recovery percentages can extensively vary among different genotypes. Light spectral quality is among the most important factors affecting plant growth and morphogenesis, but its effect with regard to cryopreservation has not been studied. In the present thesis, I studied the effect of six different light qualities on cryopreservation success of five potato cultivars before and after cryopreservation. I also explored how the different light conditions affect gene transcript abundance of recovering potato shoot tips. The results indicate that light spectral quality significantly affects the cryopreservation success of potato shoot tips in vitro. Prior to cryopreservation, cultivation under blue LEDs resulted in high initial survival, while post-cryopreservation exposure to a combination of red and blue LEDs (90% red, 10% blue) doubled the regeneration percentages. Concurrently, for most cultivars, red LEDs had adverse effects both before and after cryopreservation. The transcriptome analysis of potato shoot tips revealed the complex and extensive effect of cryopreservation on transcript abundance. Moreover, the expression level of stress- and defence-responsive genes was affected by light spectral quality. The positive effect of red-blue LEDs on shoot formation could tentatively be associated with a higher level of morphogenesis-related transcripts and lower level of stress and defence-responsive transcripts. The present thesis reveals that light spectral quality is an additional non-cryogenic factor, which can significantly increase the cryopreservation efficiency of plant germplasm
Tiivistelmä Syväjäädytys mahdollistaa geenivarojen säilytyksen erittäin alhaisissa lämpötiloissa (<-150°C), siten että niiden elin- ja uusiutumiskyky säilyvät. Menetelmä soveltuu erityisesti sellaisten kasvimateriaalien pitkäaikaissäilytykseen, joita ei voida säilöä siementen avulla. Peruna (Solanum tuberosum L.) on yksi maailman tärkeimmistä ruokakasveista ja sen geenivaroja säilytetään lähes pelkästään vegetatiivisesti. Syväjäädytysmenetelmää käytetäänkin kasvavissa määrin perunan geenivarojen taltioimiseen geenipankeissa. Haasteena on kuitenkin syväjäädytyksen jälkeinen suuri vaihtelu elpymisprosenteissa eri genotyyppien välillä. Valon laatu on yksi tärkeimmistä kasvien kasvuun ja kehitykseen vaikuttavista tekijöistä, mutta sen vaikutusta syväjäädytyksen yhteydessä ei ole tutkittu. Väitöskirjassani tutkin kuuden erilaisen valonlaadun vaikutusta sekä syväjäädytystä edeltävän että sen jälkeisen kasvatuksen aikana viiden perunalajikkeen selviytymiseen. Lisäksi tutkin, miten erilaiset valo-olosuhteet vaikuttivat geenien ilmenemiseen elpyvissä perunan versonkärjissä. Tutkimukseni osoitti, että valon laatu vaikuttaa merkittävästi perunan versonkärkien kykyyn elpyä syväjäädytyksestä in vitro -olosuhteissa. Kun perunan versonkärkiä kasvatettiin sinisten LED-valojen alla ennen syväjäädytystä, niiden elävyysprosentit olivat korkeita, kun taas syväjäädytystä seuraava kasvatus sinipunaisten LED-valojen (90 % punaista, 10 % sinistä) alla kaksinkertaisti uusiutumisprosentit. Samanaikaisesti suurimmalle osalle lajikkeista punaisilla LED-valoilla oli epäsuotuisat vaikutukset selviytymiseen sekä syväjäädytystä edeltävän, että sitä seuraavan kasvatuksen aikana. Perunan kärkisilmujen geeniekspressioanalyysi osoitti, että syväjäädyttäminen aiheuttaa laajoja ja monitahoisia vaikutuksia kasvin geenien toiminnassa. Valon laatu vaikutti erityisesti stressi- ja puolustusgeenien ilmenemiseen. Tulokset viittaavat siihen että sinipunaisten LED-valojen uusiutumista edistävä vaikutus voi liittyä morfogeneesissä toimivien geenituotteiden runsauteen ja toisaalta stressi- ja puolustusgeenituotteiden määrän laskuun. Kaiken kaikkiaan tutkimukseni osoitti, että valon laatu on tärkeä ei-kryogeeninen tekijä, joka voi lisätä kasvien syväjäädytyksen tehokkuutta
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Chaves, Elisiane Inês Dall'oglio. "Estabelecimento "in vitro" de Citronela de Java (Cymbopogon winterianus Jowitt)." Universidade Estadual do Oeste do Paraná, 2006. http://tede.unioeste.br:8080/tede/handle/tede/1282.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Citronella of Java (Cymbopogon winterianus Jowitt) is an aromatical plant with large usage in the manufacture of mosquito repellents because it contains essential oil rich in citronelal. The application of tissue culture on a large scale in medicinal plants production has increased significantly, since the conventional methods of propagation limit the potential use of some plants. Due that, one citronella of Java protocol was established with the objective of getting an alternative technique for the propagation of that culture. Four experiments ware conducted to evaluate the asepsis time, the explant type, the effect of vegetal regulators on the "in vitro" propagation of citronella of Java, as well as the micro-propagated seedling acclimatization. The gotten results had disclosed that the use of sodium hypochlorite (0.5%) during 30 minutes promoted a satisfactory asepsis index. The shoot tips explants type showed greater potential for the ?in vitro? development. It was verified that the use of benzilaminapurine (BAP) cytokynin is indispensable to succeed in the citronella of Java "in vitro" establishment, being able to be used in the concentration of 2.0 mg L-1. However, the use of indolbutyric acid (IBA) in the different tested concentrations did not present any results that justify its use, neither in the citronella of Java multiplication nor in the root establishment. The root establishment was evidenced when micro-propagated seedlings had been inoculated only in MS culture medium. It was verified that the check (without vegetal regulator) had a direct organogenesis, while such event was not verified in the other treatments. In the micro-propagated seedling acclimatization it was verified that the use of the floating method, it was essential for the seedlings survival, resulting in high survival index
A citronela de Java (Cymbopogon winterianus Jowitt) é uma planta aromática muito utilizada na fabricação de repelentes contra mosquitos por conter óleo essencial rico em citronelal. A utilização da cultura de tecidos, como forma de propagação de plantas medicinais tem aumentado significativamente, pois os métodos convencionais de propagação limitam o potencial de uso de algumas plantas. Sendo assim, um protocolo regenerativo para a citronela de Java foi estabelecido com o objetivo de se obter uma técnica alternativa para a propagação dessa cultura. Para isso foram realizados quatro experimentos envolvendo a avaliação do tempo de assepsia, do tipo de explante, do efeito de reguladores vegetais na propagação in vitro da citronela de Java, bem como a aclimatação das plântulas micropropagadas. Os resultados obtidos revelaram que a utilização do hipoclorito de sódio (0,5%) por 30 minutos promoveu índice satisfatório de assepsia. Os explantes com maior potencial ao desenvolvimento in vitro foram os ápices caulinares. Verificou-se que o emprego da citocinina benzilaminopurina (BAP) é indispensável para o sucesso do estabelecimento in vitro da citronela de Java, podendo ser utilizado na concentração de 2,0 mg L-1. No entanto, a utilização do ácido indolbutírico (IBA) nas diferentes concentrações testadas não apresentou resultados que justifique seu emprego, tanto na multiplicação quanto no enraizamento das plântulas de citronela de Java. O enraizamento foi evidenciado quando as plântulas micropropagadas foram inoculadas somente em meio de cultura MS. Foi constatado que na testemunha (sem regulador vegetal) houve uma organogênese direta, não sendo verificada nos demais tratamentos. Na aclimatação das plântulas micropropagadas verificou-se que a utilização do método floating , foi fundamental para a sobrevivência das plântulas, tendo sido observado alto índice de sobrevivência
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Soediono, Andy H. "Near tip stress and strain fields for short elastic cracks." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/19557.

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Matos, Sara Mulenas Sá de. "Identificação genética humana: estudos de novos marcadores genéticos do tipo STR e InDel." Master's thesis, Escola Superior de Saúde Egas Moniz, 2013. http://hdl.handle.net/10400.26/5125.

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Dissertação para a obtenção do grau de Mestre em Biologia Molecular em Saúde
Os marcadores genéticos do tipo Short Tandem Repeats (STR), são os atualmente recomendados para a obtenção de perfis genéticos, sendo que, muito recentemente foi apresentado como obrigatório para uso forense, um novo conjunto destes marcadores. Não obstante, existem também outros tipos de marcadores genéticos passíveis de utilização para definir perfis genéticos, designadamente marcadores do tipo Inserção/Deleção, ou InDel. Os novos marcadores STR e a grande maioria dos marcadores InDel ainda não estão suficientemente estudados e implementados nos laboratórios forenses, pelo que é necessário validar a reação, calcular frequências alélicas, parâmetros estatísticos populacionais e forenses. Estudámos os novos marcadores STR e um conjunto de marcadores do tipo InDel numa amostra com cerca de 120 indivíduos do sul de Portugal, intervenientes em perícias médico-legais a decorrer no Instituto Nacional de Medicina Legal e Ciências Forenses. No que concerne aos marcadores STR incluídos no kit PowerPlex®ESI17 (promega), os ensaios de validação demonstraram a sua elevada sensibilidade, precisão e capacidade de detetar misturas de DNA. No entanto, relativamente aos limiares analíticos não está de acordo com o descrito anteriormente. Os parâmetros estatísticos populacionais e forenses estão de acordo com o esperado e o cálculo das distâncias genéticas demonstrou existir diferenças genéticas entre as populações em estudo. Relativamente aos marcadores do tipo InDel incluídos no kit Investigator DIPPlex® (Qiagen), os ensaios de validação demonstraram que o kit tem uma elevada sensibilidade, limiares analíticos relativamente baixos, boa capacidade de detetar misturas e boa precisão. As frequências alélicas estão em equilíbrio Hardy-Weinberg, no entanto os valores de heterozigotia não são os esperados. Os parâmetros estatísticos forenses estão de acordo com o esperado e o cálculo das 4 distâncias genéticas demonstrou que existem diferenças genéticas significativas relativamente a outras populações. Concluímos que ambos os kits poderão ser utilizados para a prática forense apesar de, aparentemente, não preencherem todos os requisitos habitualmente avançados para os marcadores genéticos a utilizar na rotina forense. Deverão ser realizados mais estudos com maior número de indivíduos e de diferentes populações.
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Santos, Antonio Carlos dos. "Determinação da tenacidade ao fraturamento de concretos utilizando corpos de prova do tipo "short-rod"." [s.n.], 1998. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258101.

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Orientador: Jose Luiz Antunes O. e Sousa
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil
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Resumo: Neste trabalho desenvolveu-se uma metodologia para a detenninação da tenacidade ao fraturamento (K1c)do material concreto, através de ensaio de tração com velocidade controlada em corpos de prova do tipo "short-rod", baseando-se em recomendações da ISRM. No decorrer do trabalho, elaboraram-se projetos de fôrmas para confecção dos corpos de prova, assim como um procedimento para cura e desforma dos mesmos, além de um sistema de aplicação de carga para simular o fraturamento no modo I. Foram ensaiados 72 corpos de prova do tipo "short-rod" para a detenninação de K1c,em quatro grupos de 18 corpos de prova, com distintos traços de concreto variando-se a resistência e tamanho dos agregados graúdos. Cada grupo foi dividido em três partes iguais, ensaiadas em idades diferentes. Simultaneamente ensaiaram-se corpos de prova cilíndricos para a detenninação da resistência à compressão e a resistência à tração. A metodologia adotada se mostrou adequada para a detenninação da tenacidade ao fraturamento do concreto. Os resultados obtidos indicaram dependência da tenacidade ao fraturamento em relação ao tamanho do agregado graúdo, à resistência à compressão e à idade do concreto
Mestrado
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Weaver, Rosalie Mary. "Innovation within the modern short story through the interaction of gender, nationality, and genre, Margaret Atwood's Wilderness tips and Alice Munro's Open secrets." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23675.pdf.

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Dagallier, Adrien. "Modeling acoustic impulse arrivals for shot localization in complex environments." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEC034.

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Les systèmes de localisation acoustique existent depuis le début du XXème siècle. Les tirs d’armes à feu émettent des ondes de forte amplitude (de bouche au départ du coup, balistique générée par un projectile supersonique, éventuellement d’impact) qui se propagent à grande distance. Les capteurs acoustiques pour mesurer ces ondes sont passifs, omnidirectionnels, fonctionnels par tout temps et de faible coût. Distribués dans une zone d’intérêt, ils extraient temps d’arrivée (TOAs) ou caractéristiques fréquentielles, qui permettent de remonter à une position de source via des algorithmes de localisation et des modèles de propagation. La méthode Matching de l’équipe se démarque par l’inclusion de la physique de la propagation dans la localisation : vent, température, obstacles... Les mesures à un jeu de capteurs sont comparées à des simulations numériques de propagation depuis des sources virtuelles. Celle donnant le meilleur accord est assimilée à la source du son mesuré. En pratique, les TOAs d’une onde sur un jeu de capteurs distribués et synchrones suffisent. La base de données est simulable à l’avance, tandis que la phase de Matching est quasi - temps réel. La localisation est peu sensible au bruit, à la calibration ou aux erreurs de positionnement de capteurs. La création de la base de données est toutefois numériquement coûteuse, et le traitement de géométries et sources sonores non triviales est un défi. Les questions de l’intégration de l’environnement, de la faisabilité de la localisation de tirs d’artillerie en Matching ainsi que du Matching sur les multiples arrivées d’un même tir, se posent. L’objectif de cette thèse est de concevoir un outil de modélisation qui englobe l’acquisition de données atmosphériques et de terrain, la balistique des tirs et la propagation acoustique, afin de calculer les TOAs associés aux tirs supersoniques de manière physiquement cohérente et réaliste. Le niveau de détail de chaque physique pour la phase de Matching est aligné sur le facteur identifié comme limitant. Pour ce faire, un modèle de propagation acoustique de type Fast-Marching, baptisé IFM, est proposé. IFM conserve la généralité physique des méthodes 3D+temps, mais gagne en temps de calcul en ne calculant que les TOAs. Les géométries urbaines sont traitées par des maillages non structurés, la propagation à grande distance par des maillages curvilignes adaptés au relief. Un modèle balistique, incluant les impacts de balle dans les bâtiments ou le sol et les effets aérodynamiques 3D pour les projectiles de gros calibre, est couplé à IFM la simulation des ondes balistique et d’impact. Enfin, un couplage à des modèles de mécanique des fluides numérique et de prévision numérique du temps méso-échelle est réalisé pour la détermination de données atmosphériques pertinentes, en complément ou remplacement de mesures in-situ. L’approche est évaluée en environnement urbain via deux campagnes de mesures, avec tirs supersoniques à balles réelles. Les performances de localisation de sources ponctuelles sont excellentes avec 4 capteurs ou plus. La localisation de sniper est précise avec 6 capteurs distribués, sans visibilité directe sur le tir, ce qui est à notre connaissance une première pour du sniper. Une démonstration de l’approche en artillerie est effectuée en utilisant les arrivées multiples extraites de signaux mesurés. Grâce à la précision des simulations des TOAs des ondes de bouche, balistique et d’impact, la localisation est possible depuis des capteurs faiblement espacés, sans influence notable de la géométrie de déploiement sur la performance. Là encore, il s’agit à notre connaissance une première. Le modèle développé dans cette thèse permet d’estimer numériquement les performances de n’importe quel système de détection synchrone basé sur des TOAs, sniper comme artillerie, dans des scénarios réalistes et des environnements arbitrairement complexes. L’optimisation du placement des capteurs est ainsi envisageable
Battlefield acoustics sensing systems have been used since the early 20th century for detection and localization of threats. Artillery and gun shots emit loud sounds (muzzle blast upon firing, ballistic wave emitted by the supersonic projectile, possible impact burst) which propagate at long ranges. These sounds may be recorded at low-cost, passive, all-weather, omnidirectional sensors, usually distributed over the monitored area. Sensor data are then fused, using localization algorithms and propagation models to relate observed features, e.g. times of arrival (TOAs) or spectra, to a plausible source position. The originality of the team’s approach, through the Matching method, consists in factoring in the physics of propagation: wind and temperature effects, obstacles... A database of virtual sources acoustic features is numerically predicted at a set of sensors. Upon detection of an event, observed features are evaluated against the database. The estimated sound source position is that of the closest match. In practice, TOAs of signals at synchronous, distributed sensors are sufficient for localization of e.g., sniper shots in urban areas. The database may be generated in advance, while the Matching is potentially real-time. Localization is robust to noise, sensor positioning, calibration, or environment data errors. However, building the database is computer-intensive, and handling of non-trivial geometries or sources is challenging. Integration of environment data, feasibility of artillery shot localization and of Matching multiple arrivals, are open questions. The rationale of the present work is to develop a modeling suite, from procurement of terrain and atmosphere data, to shot ballistics and acoustic propagation, to compute TOAs of the acoustic emissions of supersonic shots in a consistent and physics-based fashion. Each time, limiting factors (sensor position error, atmospheric data accuracy, ballistic dispersion...) are determined, and all models are consequently refined, or simplified, to the befitting level of detail for the Matching phase. More specifically, a Fast-Marching acoustic propagation model is derived and implemented (IFM). IFM retains the physical generality of 3D+time solvers, while computing only TOAs and thus being much faster. IFM handles urban geometries with unstructured meshes, and long range propagation with terrain-following grids. Coupling to a ballistic model accounts for sound emissions of supersonic shots. Bullet hits in building façades or the ground and 3D aerodynamic effects for large caliber projectiles are considered. IFM is then coupled to computational fluid dynamics or meso-scale numerical weather prediction models to determine relevant atmospheric inputs in support or replacement of on-site measurements. Two measurement campaigns were conducted for evaluation of the approach in built-up areas, including supersonic weapons and actual live ammunition. Point source localization performance is state-of-the-art with down to 4 sensors. Sniper localization performs well with down to 6 sensors, including fully non-line-of-sight sensors configurations - which is to our knowledge a first for countersniper systems. Localization of artillery shots is demonstrated on the multiple arrivals of measured artillery signals, from a small baseline array, with little influence of the array geometry on the sensing performance, thanks to the accuracy of the predicted muzzle blast, ballistic wave and impact burst TOAs. Again, this is to our knowledge a first. The modeling suite developed in this work may readily assess the performance of any synchronous, TOA-based sensing system in realistic scenarii, in arbitrarily complex, nonline- of-sight environments - with a common framework for both counter-sniper and counter artillery systems. It could also be used as a decision aid, to choose the most fitting sensor configuration for surveillance of a given area, in a given scenario
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Books on the topic "Shoot tips"

1

(Firm), Lonely Planet Publications. Lonely Planet's best ever video tips: Learn to shoot and share better travel video. Oakland, CA: Lonely Planet, 2015.

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Templeton, C. W. Effect of short-term storage of shoot tips from black spruce container seedlings on the estimation of bud initiation and needle primordia number. Sault Ste. Marie: Ontario, Ministry of Natural Resources, 1992.

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Holmes, Caroline. New shoots old tips. London: Frances Lincoln, 2004.

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Atwood, Margaret Eleanor. Wilderness tips. London: Bloomsbury, 1991.

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Atwood, Margaret Eleanor. Wilderness Tips. New York: Bantam Books, 1993.

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Atwood, Margaret Eleanor. Wilderness tips. Hampton, N.H: Eagle Large Print, 1993.

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Atwood, Margaret Eleanor. Wilderness tips. New York: Anchor Books/Doubleday, 1998.

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Atwood, Margaret Eleanor. Wilderness tips. Toronto: Seal Books, 1998.

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Atwood, Margaret Eleanor. Wilderness tips. Toronto: McClelland-Bantam, 1992.

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Atwood, Margaret Eleanor. Wilderness tips. New York: Bantam Books, 1995.

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Book chapters on the topic "Shoot tips"

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Benson, Erica E., Keith Harding, and Jason W. Johnston. "Cryopreservation of Shoot Tips and Meristems." In Cryopreservation and Freeze-Drying Protocols, 163–83. Totowa, NJ: Humana Press, 2007. http://dx.doi.org/10.1007/978-1-59745-362-2_12.

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Grout, B. W. W. "Cryopreservation of Excised Meristems, Shoot Tips and Somatic Embryos." In Genetic Preservation of Plant Cells in Vitro, 47–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-78661-7_4.

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Souza, Fernanda Vidigal Duarte, Everton Hilo de Souza, Ergun Kaya, Lívia de Jesus Vieira, and Ronilze Leite da Silva. "Cryopreservation of Pineapple Shoot Tips by the Droplet Vitrification Technique." In Plant Cell Culture Protocols, 269–77. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-8594-4_18.

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Pâques, M., V. Monod, M. Poissonnier, and J. Dereuddre. "Cryopreservation of Eucalyptus sp. Shoot Tips by the Encapsulation-Dehydration Procedure." In Biotechnology in Agriculture and Forestry, 234–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04674-6_17.

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Uozumi, N., and T. Kobayashi. "Artificial Seed Production Through Encapsulation of Hairy Root and Shoot Tips." In Biotechnology in Agriculture and Forestry, 170–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-662-03091-2_11.

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Benson, Erica E., and Keith Harding. "Cryopreservation of Shoot Tips and Meristems: An Overview of Contemporary Methodologies." In Plant Cell Culture Protocols, 191–226. Totowa, NJ: Humana Press, 2012. http://dx.doi.org/10.1007/978-1-61779-818-4_16.

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Shimizu, Hiroshi, and Royal D. Heins. "Estimating Cuticle Resistance of Seedling Shoot Tips Based on the Penman-Monteith Model." In Transplant Production in the 21st Century, 59–62. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9371-7_8.

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Feng, Chaohong, Renrui Wang, Jingwei Li, Biao Wang, Zhenfang Yin, Zhenhua Cui, Baiquan Li, et al. "Production of Pathogen-Free Horticultural Crops by Cryotherapy of In Vitro-Grown Shoot Tips." In Methods in Molecular Biology, 463–82. Totowa, NJ: Humana Press, 2012. http://dx.doi.org/10.1007/978-1-62703-074-8_35.

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Matsumoto, Toshikazu. "Cryopreservation of In Vitro Grown Apical Shoot Tips of Wasabia japonica (Wasabi) by Different Procedures." In Biotechnology in Agriculture and Forestry, 180–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04674-6_13.

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Senula, Angelika, and Manuela Nagel. "Cryopreservation of Plant Shoot Tips of Potato, Mint, Garlic, and Shallot Using Plant Vitrification Solution 3." In Cryopreservation and Freeze-Drying Protocols, 647–61. New York, NY: Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-0783-1_35.

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Conference papers on the topic "Shoot tips"

1

DEDKOV, G. V., and S. SH REKHVIASHVILI. "STM (AFM) TIP TESTING BY RUTHERFORD BACKSCATTERING." In Reviews and Short Notes to Nanomeeting '97. WORLD SCIENTIFIC, 1997. http://dx.doi.org/10.1142/9789814503938_0055.

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Buttery, Paula, and Anna Korhonen. "I will shoot your shopping down and you can shoot all my tins." In the Workshop. Morristown, NJ, USA: Association for Computational Linguistics, 2007. http://dx.doi.org/10.3115/1642025.1642030.

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Buttery, Paula, and Anna Korhonen. "I will shoot your shopping down and you can shoot all my tins." In the Workshop. Morristown, NJ, USA: Association for Computational Linguistics, 2007. http://dx.doi.org/10.3115/1629795.1629800.

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GAVRILOV, S. A., S. V. LEMESHKO, V. I. SHEVYAKOV, and V. M. ROSCHIN. "KINETICS OF TIP INDUCED OXIDATION BY SCANNING PROBE MICROSCOPE." In Reviews and Short Notes to NANOMEETING-2001. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812810076_0056.

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MIRONOV, V. L., B. A. GRIBKOV, A. A. FRAERMAN, N. I. POLUSHKIN, and S. N. VDOVICHEV. "MFM TIP INDUCED REMAGNETIZATION EFFECTS IN ELLIPTICAL FERROMAGNETIC NANOPARTICLES." In Reviews and Short Notes to Nanomeeting-2005. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701947_0067.

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CHIZHIK, S. A., S. O. ABETKOVSKAYA, I. A. ZHUKOVA, A. E. SHASHKOV, and S. A. ZHDANOK. "COMPARATIVE ANALYSIS OF AFM PROBE TIP MODIFICATION WITH CARBON NANOTUBES." In Reviews and Short Notes to Nanomeeting-2005. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701947_0053.

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Scrinzi, Erica, Iacopo Giovannetti, Nuo Sheng, and Luc Leblanc. "Development of New Abradable/Abrasive Sealing Systems for Clearance Control in Gas Turbines." In ASME 2013 Turbine Blade Tip Symposium. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/tbts2013-2065.

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Abradable/abrasive sealing systems are currently used in gas turbines to reduce the blade tip gas leakage and consequently improve the turbine efficiency. The coatings selection is directly related to the section in which they are used. Seal systems for hot gas paths are primarily required to withstand high temperature. The abradable coating should be easily removed by the tip blade without causing significant blade wear, whereas the blades should have sufficient cutting capabilities. Durability properties, such as erosion resistance, are also required. Owing to their temperature capabilities, porous ceramic coatings are successfully used as abradable coatings. Although they are characterized by good abradability properties, their resistance to environmental attacks, such as solid particle erosion, is limited by the porous microstructure which negatively affects their service life. It is apparent that durability and abradability are the main targets to be simultaneously achieved for ensuring longer service life and improved efficiency. The present work is aimed at developing new abradable/abrasive coatings pairs able to ensure both the durability performances of the coatings and good abradability properties. Three ceramic abradable coatings with DVC and porous microstructure have been studied. The down-selection process has been carried out by considering the microstructure, the hardness, the tensile adhesion strength, the erosion resistance, and the furnace cycle test resistance. A composite coating made by NiCoCrAlY matrix containing abrasive grits applied by electrolytic process was selected as abrasive material system. The abrasive grits (patent application in process by GE Oil&Gas) consists of a mixture of ceramic particles. These grits ensure both short-term cutting capability and thermal stability, assuring the clearance maintenance over time. The abradability of the seal system was assessed by a properly designed test, namely Rub Rig test, which simulates the blade incursion in the abradable coating. Surface patterns on abradable coating were also considered to further enhance the abradability. Engine tests are foreseen for assessing the service behavior of this seal system.
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Cizelj, Leon, and Heinz Riesch-Oppermann. "Short Intergranular Cracks in Elasto-Plastic Polycrystalline Aggregate." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22534.

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Computational algorithms aiming at modeling and visualization of the initiation and growth of intergranular stress corrosion cracks (e.g., in the steam generator tubes) on the grain-size scale have already been proposed. Main focus of the paper addresses the influence of randomly oriented anisotropic elasto-plastic grains on the microscopic stress fields at crack tips. The limited number of calculations indicate that the incompatibility strains, which develop along the boundaries of randomly oriented grains, influence the local stress fields (J-integrals) at crack tips significantly.
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Gusev, Aleksei, Alisa Vinogradova, Sergey Novoselov, and Sergei Astapov. "SdSVC Challenge 2021: Tips and Tricks to Boost the Short-Duration Speaker Verification System Performance." In Interspeech 2021. ISCA: ISCA, 2021. http://dx.doi.org/10.21437/interspeech.2021-1737.

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Nezym, Vitaliy Yu. "Use of Turning Additional Blades in Compressor Rotor." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68069.

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An application of tip devices in the form of turning (adjustable) tip additional blades is rather effective means of influence on compressor performance due to change of fluid conditions in the region of rotating blade tips. The paper presents main results of tests of turning tip additional blades of two types. Firstly tip elements of rotating blades were substituted for turning tip additional blades at full length of the blade chord projection. While testing of these “large” additional blades with variable stagger angles, a significant shift of rotor performance curve to lower values of flow coefficients was observed, but this positive effect was accompanied by a great rotor peak efficiency drop. Then the similar turning tip additional blades were arranged only in the inlet part of rotating blades (“short” additional blades). Testing was done under condition of variable stagger angles in common with change of axial clearance between blade elements. As a result of these two parameters combination, maximum extension of stable operating range was found. And the important fact is that the rotor efficiency drop was relatively small after sharpening the inlet edges of the succeeding elements of rotating blades.
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