Relevant bibliographies by topics / Plante a latex

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Academic literature on the topic 'Plante a latex'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Plante a latex"

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Menzel, Christopher M., and Lindsay Smith. "Effect of Time of Planting and Plant Size on the Productivity of ‘Festival’ and ‘Florida Fortuna’ Strawberry Plants in a Subtropical Environment." HortTechnology 22, no. 3 (June 2012): 330–37. http://dx.doi.org/10.21273/horttech.22.3.330.

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The effect of time of planting and plant size on the performance of ‘Festival’ and ‘Florida Fortuna’ strawberry (Fragaria ×ananassa) plants was studied at Nambour in southeastern Queensland, Australia, over 2 years. The main objective of the work was to determine whether small plants yielded proportionally less than large plants as planting was delayed. First, bare-rooted transplants of ‘Festival’ were divided into small (crown diameters ranging from 6 to 10 mm) or large plants (10 to 17 mm) and planted in late March, mid-April, or late April. Second, transplants of ‘Florida Fortuna’ were divided into small (5 to 8 mm) or large plants (8 to 17 mm) and planted in early April, mid-April, or early May. The early planting for each cultivar corresponded with the time that the transplants are first available from commercial strawberry nurseries. Yields were generally greater in plants planted in late March/early April compared with plants planted later. Differences in yield between the small and large plants were consistent across the different times of planting, with the small plants always having lower yields. Small transplants are an issue for the productivity of strawberry fields in this environment whether they are planted early or late. Producers should consider paying a premium for large transplants delivered early in the season.
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Galletta, G. J., J. M. Enns, and J. L. Maas. "Strawberry Cultivar Responses to Variations in Planting Time, Stock, and Mulches." HortScience 31, no. 4 (August 1996): 610c—610. http://dx.doi.org/10.21273/hortsci.31.4.610c.

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The cultivars Allstar, Honeoye, Kent, and Jewel yielded the most successful summer and subsequent spring crops when planted in mid-July from dormant, cold-stored, multiple-crowned, nursery mother plants. Summer fruit sizing during very high temperatures was a problem; fruit number and quality was not. In a second hot year, the same cultivars did not give satisfactory summer crops when planted after late July. The return spring crop was most successful following planting in July rather than August or September, though there was a significant cultivar × planting date interaction for a number of characters. Nursery mother plants were more productive than first daughter plants. `Tristar' outyielded `Seascape' on black poly-mulched beds but not on killed vetch sod beds. `Allstar' runnered freely and produced good crops on three types of raised bed killed sod mulches and on red, blue, and silver-painted black poly raised bed mulches. Compared to the summer-planted, black, poly-mulched standard, `Mohawk' had increased but later yields, when the poly was painted blue, red, or silver, and much later yields, when mulched with recycled paper or wood fiber. The silver and paper treatments depressed fruit size. The wood fiber mulch seems promising for deliberately delaying ripening by lowering soil temperatures under the mulch. Seedling and selection plantings have generally responded favorably to summer planting from potted or “plug” plant stocks on unfumigated soil, thus, shortening the selection and evaluation cycles, with accompanying savings in land, water, fertilizer, and pesticide use.
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Scheffler, Norman E. "Inherently safer latex plants." Process Safety Progress 15, no. 1 (1996): 11–17. http://dx.doi.org/10.1002/prs.680150107.

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Utami, Liliek, Robert G. Anderson, Robert L. Geneve, and Sharon Kester. "QUALITY AND YIELD OF AGERATUM, ASTER, CELOSIA AND GODETIA GROWN AS FIELD GROWN CUTFLOWERS." HortScience 25, no. 8 (August 1990): 851b—851. http://dx.doi.org/10.21273/hortsci.25.8.851b.

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Warm season annual flowers were trialed as field grown cutflowers in the summer of 1989. Plants were transplanted to the field in early or late May and grown at densities of 40 plants m-2 in beds with black plastic mulch, trickle irrigation and support wires. Tall ageratum, `Horizon Blue'., plants were harvested throughout the summer with total yields of 290 stems m-2with stem lengths over 36 cm long. Stem lengths increased significantly over the summer; 40% of the stems harvested in September were over 56 cm long. Spray asters, `Matsumoto Blue', Matsumoto Red' and `Serene Red', were harvested eight weeks after transplanting with yields of 20 to 30 stems m-2; 60% of the stems were 36-45 cm long and 40% were 46-55 cm long. Tall, crested celosia, `Red Chief', `Gold Chief' and `Fire Chief', plants were harvested 8 weeks after transplanting with yields of 45 stems m-2 over 60% of the stems were 45 cm long or longer. Godetia, `Grace Red' and `Grace Salmon', plants sown March 3 and planted in the field April 10, performed well; later plantings were much less successful. Plants were planted at a density of 5 m-2 and produced 25 to 50 flower stems per plant; stem lengths were 30 to 38 cm long.
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Chercuitte, L., J. A. SulIivan, Y. D. Desjardins, and R. Bedard. "Yield Potential and Vegetative Growth of Summer-planted Strawberry." Journal of the American Society for Horticultural Science 116, no. 6 (November 1991): 930–36. http://dx.doi.org/10.21273/jashs.116.6.930.

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The waiting-bed (WB) system has the potential to significantly increase the length of the strawberry (Fragaria Xananassa Duch.) production season. In the WB phase of this system the plants were deblossomed and runners were removed to stimulate the production of a multiple crowned plant. The objective of this study was to examine the influence of planting date and cultivar on yield potential and vegetative growth of the strawberry plants in the WB and cropping beds (CB). Experiments were conducted in Ontario and Quebec. Early establishment of the WB favored the production of large multicrown plants. `Kent' appeared to be the best cultivar among five tested due to the many berries produced because of good fruit set. Yield potential was not realized in late-planted CB. The highest yields per plant (273 g) were obtained in Quebec with plants from the earliest WB. Yields in CB decreased with later plantings due to stress of transplanting when air and soil temperatures were high. Berry count was identified as the yield component most affected by the later planting date of the CB. The WB system has potential for season extension in strawberry, but WB must be established early in the season to encourage the development of a plant with high yield potential.
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Margaris, N. S., and D. Vokou. "Latex producing plants in Greece." Biomass 7, no. 3 (January 1985): 161–70. http://dx.doi.org/10.1016/0144-4565(85)90005-8.

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Najdenovska, Olga, and Ana Selimovska. "The influence of the runner ordering of the plants on their quality, rooting and yield of strawberries." Zbornik Matice srpske za prirodne nauke, no. 119 (2010): 55–60. http://dx.doi.org/10.2298/zmspn1019055n.

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In this work, we presented the influence of the runner ordering of the plants on their quality, percentage of root hair formation, and yield of two varieties of strawberries: Senga Sengana and Pocahontas depending on the time of planting. The runner ordering of plants and time of their planting have influence on the quality of plants, the percentage of root hair formation after the planting, and the yield. There has been established strong correlation among the diameter of the crown and the rooting when planted and the yield. Primary plants have higher quality, with bigger diameter of the crown, they take root better, and they have higher yield than secondary plants. Rosettes planted in August have higher yield than the ones planted later.
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Allen, E. J., P. J. O'Brien, and D. Firman. "An evaluation of small seed for ware-potato production." Journal of Agricultural Science 118, no. 2 (April 1992): 185–93. http://dx.doi.org/10.1017/s0021859600068775.

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SUMMARYSixteen experiments over six seasons (1981–87) compared the growth and yield of up to 16 seed-tuber weights, ranging from 1–5 to 110–120 g, in one second-early and four maincrop varieties. Four of the experiments (1986–87) examined effects in seed tubers from seed crops planted in July; the remaining experiments used seed from crops planted at the normal time, April–May. Effects were similar for seed from the different planting dates. Plants from seed < 5 g (and occasionally up to 15 g) emerged slightly later and produced a smaller crop canopy that those from larger seed. The later emergence from the smallest seed was a consequence of a slower rate of sprout elongation. There were no effects of seed weight above 15 g on stem emergence or growth of the canopy. In 1982, a severe frost completely defoliated all plants in four experiments but within 2 weeks complete plant emergence was re-achieved from all seed weights except the smallest (1–5 g). The results suggest few differences between seed weights > 5 or 10 g in emergence from similar depths of planting or in recovery from frost damage.Tuber yields were little affected by seed weight > 5 or 10 g, even at constant within-row spacings. Consequently, seed rates from 0·59 to 5·4 t/ha produced similar yields and the results suggest considerable economic benefits and potential for using seed tubers of much smaller weight than may be sold under current legislation. The use of small seed tubers from late-planted crops may result in further economies in production costs and reduction in disease in seed tubers.
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Keeley, Paul E., Robert J. Thullen, and Charles H. Carter. "Influence of Planting Date on Growth of Ivyleaf Morningglory (Ipomoea hederacea) in Cotton (Gossypium hirsutum)." Weed Science 34, no. 6 (November 1986): 906–10. http://dx.doi.org/10.1017/s0043174500068089.

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Ivyleaf morningglory [Ipomoea hederacea(L.) Jacq. # IPOHE], planted in 1984 and 1985 the first of each month from April through August, began emerging in cotton (Gossypium hirsutumL. ‘Acala SJ-2’) 1 week after planting. Morningglory, at a density of 1 plant/2 m of row, emerging in April and May became so competitive to cotton by harvest in September that the total crop was lost. June plantings, although less competitive than earlier plantings, still reduced yields by 11%. Later plantings did not reduce yields of cotton. Morningglory plantings that produced seed (April through July) began flowering within 7 weeks, and viable seed was collected for the first time 9 weeks after planting. Ivyleaf morningglory plants that emerged in April and May produced about 11 000 seed/plant by cotton harvest. This compared to 3000 and 93 seed/plant for morningglory that emerged in June and July, respectively. The earliest that morningglory might be expected to produce seed in cotton planted in early April would be late May to early June, and morningglory emerging as late as the first of July could produce some seed by cotton harvest.
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Bell, Neil C., Bernadine C. Strik, and Lloyd Marti. "917 PB 191 EFFECT OF DATE OF PRIMOCANE SUPPRESSION ON `MARION' TRAILING BLACKBERRY: YIELD COMPONENTS." HortScience 29, no. 5 (May 1994): 565e—565. http://dx.doi.org/10.21273/hortsci.29.5.565e.

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Primocanes were cut at ground level at one-month intervals from late April to late July 1991 and 1992. An uncut control was included. Four canes per plant were trained either in August or the following February, the others being removed and measured. Yield data were collected and yield components measured in 1992 and 1993. Cane diameter, main cane length and branch cane length per plant generally declined with later suppression date. Consequently, yield per meter of cane declined with later suppression date. However, cane number and total plant main cane length were greater for all suppression treatments and percent budbreak increased with later suppression date. As a result, April- and May-suppressed plants had increased-yields compared to control plants in both 1992 and 1993, as did June-suppressed plants in 1993. August-trained plants had significantly higher yields than February-trained in both years, primarily because of increased budbreak. The basal section of canes was the most productive, because of increased budbreak and branch cane production.
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Dissertations / Theses on the topic "Plante a latex"

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Abd, Razak Shamsul Bahri B. "Development and distribution of laticifers in plants." Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4485/.

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Distribution, cytological organization and development of laticifers In some latex bearing plants were studied by the use of optical and electron microscopy. Seven species from five different families were used In a comparative study, which were Meconopsis cambrica & Papaver rhoeas (Papaveraceae), Hevea brasiliensis & Euphorbia wulfenii (Euphorbiaceae), Musa acuminata (Musaceae), Mandevilla splendens (Apocyanaceae) & Taraxacum officinale (Compositae/Asteraceae). Several preparation procedures have been compared and optimised for the structural preservation of the laticifers and for examination of their distribution in these taxa. Methods of fixation have been studied. Fresh unfixed samples showed good structural information and laticifer distribution in the tissue. This technique was also very fast and convenient to use. In practice this protocol can be applied in monitoring and screening bulk samples in a breeding program, where speed and convenience are very important. Samples fixed with aldehyde fixative gave reasonably good results for histology study but not at the electron microscope level. The samples fixed with this fixative however, were highly suited to Immunohistochemical work. This information is invaluable and will be used and adapted for Hevea study in Malaysia. Both osmium and a combination of osmium tetroxide and zinc iodide were superior in term of ultrastructural preservation. Embedding media for laticifers were compared. For histological and immunohistochemical studies, Paraplast wax was used. The preparation procedure was easy and convenient, and overall structural information of laticifers was good. Spurr resin and araldite are both epoxy resins, but samples embedded in araldite gave better, more acceptable results. The carcinogenic nature of Spun- resin means that it must be handled with extreme caution, making it a less convenient embedding medium. The only acrylic resin was LR White, which was initially Intended for an immunocytochemistry study where the priority was to retain antigenic sites. Samples embedded with this resin did not show good structural information. The final set of procedures evaluated was staining methods. The staining procedure has to be fast, must differentially stain laticifers and must be reliable. These stains can be grouped into two categories; standard histological stains such as Toluidine Blue and Safranin O with Astra Blue, and fluorescent stains such as Calcofluor, ANS and Acridine Orange. However almost all stains tested failed to differentially stain latex or laticifers. They however did assist in clarifying for identification the location and distribution of laticifers in the tissues. Using Toluidine Blue was very fast and easy, but all the fluorescent stains are faster and easier to use. Laticifers in all species examined, exhibited a similar pattern of distribution. They were located in the cambial regions of stems, petioles, leaves and roots, or closely located within the vascular bundle.
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Silva, Rayanne Farias da. "Histological analysis of tissues cultured in vitro laticÃferas plants, soluble protein profile and action against plant pathogens." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14733.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior
Laticifers plants have been studied by presenting a wide range of proteins related to plant defense in its latex. The aim of this study was to investigate, in tissue cultured in vitro, proteins and activities described for latex laticÃferas two species. Tissue callus and roots of Cryptostegia grandiflora were obtained by in vitro tissues culture protocols and subjected to histological analysis for laticifers characterization. Cultured tissue of Calotropis procera were used as comparative reference in the analysis. There wasnât any laticifer structure in callus or roots of C. grandiflora while in C. procera laticifers are formed in the roots. Soluble proteins were extracted from the cultured tissue and characterized using enzymatic assays, biochemical, immunological techniques and mass spectrometry. The presence of activity against phytopathogenic fungi was investigated and all data obtained were compared with the previously one determined for the plants studied latex. Callus and roots proteins of C. procera showed antifungal activity against pathogenic fungi. The percentage inhibition of the vegetative hyphae growth in the presence of callus and roots C. procera protein respectively were 75.5% and 82.6% for Fusarium solani, 76.7% and 57.1% for Rhizoctonia solani, 88.8% and 79.8% for Fusarium oxysporum, 93.7% and 90.2% for Colletotrichum lindemuthianum and 80.2% and 79.7% for Colletotrichum gloesporioides, however, showed no effect on Mucor sp. Callus and roots proteins of C. grandiflora showed no inhibitory effect on the hyphae growth or spores germination of assayed fungi. Through assays using fluorescent markers, it was demonstrated that proteins extracted from in vitro culture of C. procera interact with the membrane of C. gloesporioides causing leakage of cytoplasmic contents, possibly suggesting that its mechanism of action against fungi is related to the change in plasma membrane permeability. Also oxidative stress was observed in C. gloesporioides spores treated with callus and roots protein C. procera by hydrogen peroxide production. Protease inhibitors, chitinases, osmotins and proteases were detected in the C. procera callus and roots samples, however, osmotins and proteases were not observed in C. grandiflora callus and roots. The activity of antioxidant enzymes APX, G-POD and catalase were observed in tissue cultured in vitro of C. grandiflora. Considering that C. grandiflora laticifers proteases were demonstrated exert action against fungi, the results observed in this study suggest that the absence of antifungal activity in C. grandiflora cultured tissue is due to the absence of proteases in these tissues as well exclude chitinases and proteases inhibitors as antifungal proteins. The study concludes that the use of cultured tissues that do not differentiate laticifers is an interesting model to study activities associated to proteins founded in latex. Antifungal proteases present in C. grandiflora latex were not found in the tissues without laticifer formation.
Plantas laticÃferas tÃm sido estudadas por apresentarem uma grande diversidade de proteÃnas relacionadas à defesa vegetal em seu lÃtex. O objetivo deste trabalho foi pesquisar em tecidos cultivados in vitro, proteÃnas e atividades descritas para o lÃtex de duas espÃcies laticÃferas. Tecidos de calos e raÃzes de Cryptostegia grandiflora foram obtidos atravÃs de protocolos de cultura in vitro de tecidos e submetidos à anÃlise histolÃgica para caracterizaÃÃo de laticÃferos. Tecidos cultivados de Calotropis procera foram utilizados como referencial comparativo nas anÃlises. NÃo foi detectada qualquer estrutura laticÃfera em calos ou raÃzes de C. grandiflora enquanto que em C. procera laticÃferos se formam nas raÃzes. ProteÃnas solÃveis foram extraÃdas dos tecidos cultivados e caracterizadas por meio de ensaios enzimÃticos, tÃcnicas bioquÃmicas, imunolÃgicas e espectrometria de massas. A presenÃa de atividade contra fungos fitopatogÃnicos foi investigada e todos os dados obtidos foram comparados com dados previamente determinados para os lÃtex das espÃcies estudadas. ProteÃnas dos calos e raÃzes de C. procera, apresentaram atividade antifÃngica sobre fungos fitopatogÃnicos. Os percentuais de inibiÃÃo do crescimento vegetativo de hifas na presenÃa de proteÃnas de calos e raÃzes de C. procera, respectivamente, foram: 75,5% e 82,6% para Fusarium solani, 76,7% e 57,1% para Rhizoctonia solani, 88,8% e 79,8% para Fusarium oxysporum, 93,7% e 90,2% para Colletotrichum lindemuthianum e 80,2% e 79,7% para Colletotrichum gloesporioides, no entanto, nÃo demonstraram nenhum efeito sobre Mucor sp. As proteÃnas de calos e raÃzes de C. grandiflora nÃo apresentaram qualquer efeito inibitÃrio sobre o crescimento de hifas ou germinaÃÃo de esporos dos fungos avaliados. Por meio de ensaios com marcadores de fluorescÃncia, foi possÃvel demonstrar que as proteÃnas extraÃdas da cultura in vitro de C. procera interagem com a membrana de C. gloesporioides causando extravasamento do conteÃdo citoplasmÃtico, sugerindo que possivelmente seu mecanismo de aÃÃo contra fungos esteja relacionado à alteraÃÃo na permeabilidade da membrana plasmÃtica. TambÃm foi observado estresse oxidativo em esporos de C. gloesporioides tratados com proteÃnas de calos e raÃzes de C. procera atravÃs da produÃÃo de perÃxido de hidrogÃnio. Inibidores de proteases, quitinases, osmotinas e proteases foram detectados nas amostras de calos e raÃzes de C. procera, porÃm, osmotinas e proteases nÃo foram observadas em calos e raÃzes de C. grandiflora. A atividade das enzimas antioxidantes APX, G-POD e catalase foram observadas nos tecidos cultivados in vitro de C. grandiflora. Considerando que proteases laticÃferas de C. grandiflora foram demonstradas exercer aÃÃo contra fungos, os resultados observados nesta pesquisa sugerem que a ausÃncia de atividade antifÃngica em tecidos cultivados de C. grandiflora deve-se a ausÃncia de proteases nestes tecidos e ainda excluem quitinases e inibidores de proteases presentes como proteÃnas antifÃngicas. Em calos e raÃzes de C. procera, alÃm de proteases, outras proteÃnas tais como, quitinases, inibidores de proteases e osmotinas detectadas podem estar envolvidas na atividade antifÃngica observada, e/ou agir sinergicamente na defesa contra fungos. O estudo conclui que o uso de tecidos cultivados que nÃo diferenciam laticÃferos à um interessante modelo para estudar atividades associadas Ãs proteÃnas encontradas no lÃtex. Proteases antifÃngicas presentes no lÃtex de C. grandiflora nÃo foram encontradas nos tecidos sem formaÃÃo laticÃfera.
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Ducos, Jean-Paul. "Croissance et metabolisme primaire de suspensions heterotrophes de catharanthus roseus en fermenteur : importance de la phase gazeuse." Toulouse, INSA, 1986. http://www.theses.fr/1986ISAT0031.

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Agostini, Deuber Lincon da Silva [UNESP]. "Estudo dos componentes não isoprênicos do látex de Hevea brasiliensis indutores de angiogênese." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/103766.

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Made available in DSpace on 2014-06-11T19:32:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-07-05Bitstream added on 2014-06-13T18:44:19Z : No. of bitstreams: 1 agostini_dls_dr_bauru.pdf: 1803645 bytes, checksum: 1ba74c4c9393d0cd53d03478b6fe2f01 (MD5)
Atualmente é comprovado o poder de indução de angiogênese e neoformação tecidual através de membranas de borracha natural de Hevea brasiliensis. Este trabalho apresenta um estudo sobre as propriedades e a caracterização das frações não isoprênicas, separadas por centrifugação do látex, utilizado como biomaterial na indução de angiogênese e de neoformação. As frações constituintes, F2 e F3 sem o tradicional agente estabilizante de hidroxido de amônio (NH4OH), foram liofilizadas para a redução da quantidade de água e estabilização, em seguida tratadas termicamente a temperatura de 40,60,80, 100, 120 e 140ºC e novamente liofilizadas, sendo caracterizada através das técnicas de Kjeldahl, Soxhlet, de espectroscopia de absorção no infravermelho (FT-IR), Ressonância Magnética Nuclear (RMn-13C). Difração de raios x (DRX), termogravimetria (TG) acoplado ao FT-IR (IG/FT-IR), calorimetria exploratória diferencial (DSC), eletroforese, dosagens de citocinas e síntese de óxido nítrico considerando o fator limitate do uso do látex como um material bioativo, que é a temperatura de tratamento térmico, realizado para a obtenção das membranas de borracha natural, em torno de 85ºC. Foi possível verificar que a fração F3 constituinte do látex, tem propriedades anti-inflamatórias e que a fração F2 possui propriedades pró-inflamatórias
Currently it is proven the hability of inducing angiogenesis and tissue neoformating through membranes of natural rubber Hevea brasiliensis, so this work presents a study on the properties and characterization of non-isoprene fractions, separated by centrifugation, the latex used as biomaterial for induction and neoformation of angiongenesis and lyophilized without the traditional stabilizing agent, ammonium hydroxide (NH4OH). The fractions constituents, F2 and F3 fractions were lyophilized without the traditional stabilizing agent, ammonium hydroxide (NH4OH). The fractions constituents, F2 and F3 fractions were lyophilized to reduce the amount of water and stabilization, and then heat treated at temperature of 40, 60, 80, 100, 120 and 140ºC bieng characterized by the techniques of kjeldahl, Soxhlet, of absorption spectroscopy infrared (FT-IR), Nuclear Magnetic Resonance (NMR-13C), X-ray Diffraction (XRD), thermogravimetry (TG) coupled to FT-IR (TG-IR), differential scanning calorimetry (DSC), electrosphoresis, serum cytokines and oxide nitric (NO) considering the limiting factor in the use of latex as a bioactive material, which is the thermal treatment temperature, held for obtaining membranes of natural rubber, about 85ºC. It was possible to verify that the fraction F3 constituent latex has anti-inflammatory and the fraction F2 take inflammatory properties
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Agostini, Deuber Lincon da Silva. "Estudo dos componentes não isoprênicos do látex de Hevea brasiliensis indutores de angiogênese /." Bauru, 2013. http://hdl.handle.net/11449/103766.

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Orientador: Aldo Eloizo Job
Banca: Mariselma Ferreira
Banca: Ivan Helmuth Bechtold
Banca: José Antonio Malmonge
Banca: Eduardo René Perez
Resumo: Atualmente é comprovado o poder de indução de angiogênese e neoformação tecidual através de membranas de borracha natural de Hevea brasiliensis. Este trabalho apresenta um estudo sobre as propriedades e a caracterização das frações não isoprênicas, separadas por centrifugação do látex, utilizado como biomaterial na indução de angiogênese e de neoformação. As frações constituintes, F2 e F3 sem o tradicional agente estabilizante de hidroxido de amônio (NH4OH), foram liofilizadas para a redução da quantidade de água e estabilização, em seguida tratadas termicamente a temperatura de 40,60,80, 100, 120 e 140ºC e novamente liofilizadas, sendo caracterizada através das técnicas de Kjeldahl, Soxhlet, de espectroscopia de absorção no infravermelho (FT-IR), Ressonância Magnética Nuclear (RMn-13C). Difração de raios x (DRX), termogravimetria (TG) acoplado ao FT-IR (IG/FT-IR), calorimetria exploratória diferencial (DSC), eletroforese, dosagens de citocinas e síntese de óxido nítrico considerando o fator limitate do uso do látex como um material bioativo, que é a temperatura de tratamento térmico, realizado para a obtenção das membranas de borracha natural, em torno de 85ºC. Foi possível verificar que a fração F3 constituinte do látex, tem propriedades anti-inflamatórias e que a fração F2 possui propriedades pró-inflamatórias
Abstract: Currently it is proven the hability of inducing angiogenesis and tissue neoformating through membranes of natural rubber Hevea brasiliensis, so this work presents a study on the properties and characterization of non-isoprene fractions, separated by centrifugation, the latex used as biomaterial for induction and neoformation of angiongenesis and lyophilized without the traditional stabilizing agent, ammonium hydroxide (NH4OH). The fractions constituents, F2 and F3 fractions were lyophilized without the traditional stabilizing agent, ammonium hydroxide (NH4OH). The fractions constituents, F2 and F3 fractions were lyophilized to reduce the amount of water and stabilization, and then heat treated at temperature of 40, 60, 80, 100, 120 and 140ºC bieng characterized by the techniques of kjeldahl, Soxhlet, of absorption spectroscopy infrared (FT-IR), Nuclear Magnetic Resonance (NMR-13C), X-ray Diffraction (XRD), thermogravimetry (TG) coupled to FT-IR (TG-IR), differential scanning calorimetry (DSC), electrosphoresis, serum cytokines and oxide nitric (NO) considering the limiting factor in the use of latex as a bioactive material, which is the thermal treatment temperature, held for obtaining membranes of natural rubber, about 85ºC. It was possible to verify that the fraction F3 constituent latex has anti-inflammatory and the fraction F2 take inflammatory properties
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Clark, L. J., R. Walser, and E. W. Carpenter. "Fall Planted, Late Maturing Onion Variety Trial." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/220391.

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Thirteen late maturing onion varieties were planted in the fall of 1998 and grown in a replicated small plot trial on the Safford Agricultural Center. Bulbs were pulled and the tops removed in early June. Three NuMex varieties, Mesa, Starlite and BR1, produced the best yields. Yields are shown in tabular form together with size distribution and quality characteristics.
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Sow, Demba. "Contribution à l'étude expérimentale et à la modélisation de la digestion anaérobie de Euphorbia tirucalli et d'autres plantes à latex sahéliennes : euphorbia balsamifera et calotropis procera." Châtenay-Malabry, Ecole centrale de Paris, 1993. http://www.theses.fr/1993ECAP0323.

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Le présent travail a consisté à fermenter des plantes à latex pour la production de biogaz. Ainsi, Euphorbia tirucalli, coupé en morceaux ou broyé, est digéré à 37°C puis à 48°C dans différents réacteurs. Les rendements varient de 0,301/l. J a 0,891/l. J. La meilleure productivité en biogaz est obtenue avec la plante coupée en morceaux. La digestion anaérobie de Euphorbia balsamifera et de Calotropis procera, avec des réacteurs de 1,5 l incubés à 37°C puis à 48°C, a donné des rendements variant de 0,30 l/l. J à 0,78 l. J. Notre modèle de simulation de la digestion anaérobie est basé sur l'acétate, le propionate et le glucose. Grâce aux équations mathématiques proposées et aux résultats expérimentaux, nous avons déterminé les constantes des équations. Ainsi, nous avons validé le modèle pour différents fermenteurs de Euphorbia tirucalli.
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Dusotoit-Coucaud, Anaïs. "Caractérisations physiologique et moléculaire des transporteurs de sucres et de polyols des cellules laticifères chez "Hevea brasiliensis", en relation avec la production de latex." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2009. http://tel.archives-ouvertes.fr/tel-00725589.

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L'hévéa est un arbre qui revêt un fort intérêt à l'échelle mondiale. Il représente la seule source de caoutchouc naturel commercialement exploitée. La demande grandissante de cette matière première a conduit à l'initiation de nombreuses recherches visant à augmenter la production de latex. La biosynthèse du caoutchouc à partir du saccharose se déroule dans le cytoplasme (latex) des cellules laticifères, hétérotrophes et dépourvues de plasmodesmes, les cellules laticifères disposeraient d'un équipement membranaire de transporteurs actifs spécifiques, afin de répondre à leurs besoins importants en photoassimilats.Toutefois, le rôle de ces transporteurs dans la physiologie des cellules laticifères n'a jamais été élucidé. Ce travail propose la première étude moléculaire des co-transporteurs H+ / sucres solubles et H+ / polyol (quebrachitol) au sein des cellules laticifères, en relation aves la production de latex. Ce travail a permis l'identification des premiers co-transpoteurs de saccharose d'hexoses et de polyols chez l'hévéa. Dix gènes de trasporteurs ont été clonés dans les cellules laticifères : 7 transporteurs putatifs de saccharose (HbSUT1A, HbSUT B, HbSUT2A, HbSUT2B, HbSUT2C, HbSUT4, HbSUT5), 1 transporteur putatif d'hexoses (HbHXT1) et 2 transporteurs putatifs de polyols (HbPLT1, HbPLT2). Ensuite les caractérisations physiologiques et moléculaires fines de ces transporteurs ont permis la mise en evidence du rôle potentiel et complémentaire de HbSUT1B, HbHXT1et HbPLT2 dans la production de latex, HbSUT1B et HbHXT1 seraient impliqués dans la régulation de la régénération du latex, alors que HbPLT2 interviendrait dans le contrôle de l'écoulement. Ces trois gènes sont proposés en tant que marqueurs moléculaires potentiels de production.
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Titchener, Frederick Robert. "Plant-arthropod interactions in the late Tertiary." Thesis, Royal Holloway, University of London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.482120.

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Rethwisch, M. D., M. Reay, G. Chaffin, R. Perez, J. Grudovich, J. Wellman, and E. Hawpe. "Late Planted DPL451BR Cotton Responses to Plant Growth Enhancement Products Applied at Three Crop Development Stages in Palo Verde Valley, 2003." College of Agriculture, University of Arizona (Tucson, AZ), 2004. http://hdl.handle.net/10150/198128.

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An experiment to investigate the effects of several plant growth enhancement products (AuxiGro7 WP, FirstChoice7 Bollster, CalMax, FoliGro7 BollSet) on DPL 451BR was conducted in the Palo Verde Valley. The cotton field chosen for this project was planted in April 2003, and flowering and boll/lint production was highly affected by summer heat, therefore product effectiveness was tested under the extreme high temperatures conditions that existed in 2003. Products were applied July 11 (shortly after first bloom), August 1st and/or August 15. Three rates (1, 2, 4 oz./acre) of AuxiGro7 WP were applied at each date, although just a single rate of other products was evaluated. Data collected included plant mapping following the first two application dates as well as lint yield and quality at harvest on October 20-23. Data indicated rate effects for treatments containing AuxiGro7 WP as noted in response to applications on August 1 (retention rates) and August 15 (cotton quality factors). These responses were signficantly different than the untreated check, and were often signficantly different than the Bollster fertilizer treatment itself as though Bollster was also included with AuxiGro7 WP treatments. Although yields for any treatment and the untreated check were not significantly different, previously noted differences for retention for the AuxiGro7 WP treatments may not have been realized due to the high temperatures and extended periods of not only Level 1 but Level 2 stress during the course of the experiment. Cotton values per acre were highest ($609.85/acre) in the 4 oz/acre of AuxiGro7 applied on August 15, due to highest valued lint as a result of micronaire of 5.2 combined with increased fiber strength and fiber length. Application of CalMax resulted in a significant increase in fiber strength following two applications of 4 oz./acre of AuxiGro7 + Bollster, but CalMax following two applications of Bollster did not affect fiber strength when compared with each of the two application treatments. A third application of FoliGro7 BollSet was detrimental for cotton yields and strength compared with only two applications of this product, although both treatment regimens resulted in shorter fibers that were not quite as strong as the untreated check.
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Books on the topic "Plante a latex"

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Coppen, J. J. W. Gums, resins and latexes of plant origin. Rome: Food and Agriculture Organization of the United Nations, 1995.

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Riddell, William Renwick. The pharmacopoeia of a botanical physician later. [Edinburgh?: Botanical Society of Edinburgh?, 1996.

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Harvey, John H. The availability of hardy plants of the late eighteenth century. [Reading, Berkshire?]: Garden History Society, 1988.

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Harvey, John H. The availability of hardy plants of the late eighteenth century. [Glastonbury]: Garden History Society, 1988.

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Garden, Missouri Botanical, ed. Late Cretaceous and Cenozoic history of Latin American vegetation and terrestrial environments. St . Louis, Mo: Missouri Botanical Garden Press, 2010.

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Harvey, John. The availability of hardy plants of the late eighteenth century. (Cheltenham): Garden History Society, 1988.

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Graham, Alan. Late Cretaceous and Cenozoic history of North American vegetation: North of Mexico. New York: Oxford University Press, 1999.

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Bashforth, Arden R. Late Carboniferous (Bolsovian) macroflora from the Barachois Group, Bay St. George Basin, southwestern Newfoundland, Canada. Calgary: Canadian Society of Petroleum Geologists, 2005.

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Evolution of Laurussia: A study in late Palaeozoic plate tectonics. Dordrecht: Kluwer Academic Publishers, 1989.

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Potter, Brian E. A climatology of late-spring freezes in the Northeastern United States. St. Paul, Minn: U.S. Dept. of Agriculture, Forest Service, North Central Research Station, 1999.

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Book chapters on the topic "Plante a latex"

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Aizen, Marcelo A., and Carolina L. Morales. "Impacts of non-native plants on plant-pollinator interactions." In Plant invasions: the role of biotic interactions, 241–55. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789242171.0241.

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Abstract There has been growing interest in the consequences of invasive non-native plants for the plant-pollinator mutualism, most likely because of its relevance for the maintenance of terrestrial biodiversity and food production. However, the development of this research field has been thematically uneven and the overall evidence inconclusive. Many studies have focused on how non-native plants interact with native plants via pollinator sharing, which have allowed meta-analytical syntheses, whereas several others have looked at how frequently non-native plants integrate into native plant-pollinator webs and how they affect network structure. However, relatively few studies have addressed the consequences of invasive plants for pollinators. Overall, the research approach in this area has been predominantly phenomenological rather than mechanistic, which has hindered our understanding of apparently contradictory evidence. One key characteristic of invasive non-native plants that seems to mediate negative effects on the pollination mutualism is the high relative abundance that they reach at late stages of invasion. This high dominance is apparently the main trigger of all the disruptive direct and indirect effects that are discussed in this chapter. Finally, we identify several intriguing questions on the ecological and evolutionary consequences of invasive plants for the plant-pollinator mutualism waiting to be answered.
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Liao, Zhen, Kristian Persson Hodén, and Christina Dixelius. "Small talk and large impact: the importance of small RNA molecules in the fight against plant diseases." In RNAi for plant improvement and protection, 86–93. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789248890.0086.

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Abstract This short and general chapter summarizes how plants and pathogens communicate using not only proteins for recognition and signal transduction or other metabolites but also RNA molecules where small RNAs with sizes between 21 to 40 nt are most important. These small RNAs can move between plants and a range of interacting pathogenic organisms in both directions, that is, a 'cross-kingdom' communication process. The first reports on RNA-based communications between plants and plant pathogenic fungi appeared about 10 years ago. Since that time, we have learnt much about sRNA biology in plants and their function in different parasitic organisms. However, many questions on the processes involved remain unanswered. Such information is crucial in order to sustain high crop production. Besides giving a brief background, we highlight the interactions between the potato late blight pathogen and its plant host potato.
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Liao, Zhen, Kristian Persson Hodén, and Christina Dixelius. "Small talk and large impact: the importance of small RNA molecules in the fight against plant diseases." In RNAi for plant improvement and protection, 86–93. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789248890.0009.

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Abstract This short and general chapter summarizes how plants and pathogens communicate using not only proteins for recognition and signal transduction or other metabolites but also RNA molecules where small RNAs with sizes between 21 to 40 nt are most important. These small RNAs can move between plants and a range of interacting pathogenic organisms in both directions, that is, a 'cross-kingdom' communication process. The first reports on RNA-based communications between plants and plant pathogenic fungi appeared about 10 years ago. Since that time, we have learnt much about sRNA biology in plants and their function in different parasitic organisms. However, many questions on the processes involved remain unanswered. Such information is crucial in order to sustain high crop production. Besides giving a brief background, we highlight the interactions between the potato late blight pathogen and its plant host potato.
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Roberts, Margaret F. "Papaver Latex and Alkaloid Storage Vacuoles." In Plant Vacuoles, 513–28. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4684-5341-6_65.

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Nakanishi, Tomoko M. "Water-Specific Imaging." In Novel Plant Imaging and Analysis, 3–37. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4992-6_1.

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AbstractOur first target was water, namely, how to obtain a water-specific image nondestructively. Using a neutron beam, we could visualize water-specific images of plants, including roots and flowers, which were never shown before. Each image suggested the plant-specific activity related to water.We briefly present how to acquire the image and what kind of water image is taken by neutron beam irradiation. We present a variety of plant samples, such as flowers, seeds, and wood disks. It was noted that neutrons could visualize the roots imbedded in soil without uprooting. When a spatial image of the root imbedded in soil was created from many projection images, the water profile around the root was analyzed. Then, fundamental questions were raised, such as whether plants are absorbing water solution or water vapor from the soil, because there was always a space adjacent to the root surface and hardly any water solution was visualized there. The roots are in constant motion during growth, known as circumnutation, and it is natural that the root tip is always pushing the soil aside to produce space for the root to grow. If the roots are absorbing water vapor, then the next question is about metals. Are the roots absorbing metal vapor? Since we tended to employ water culture to study the physiological activity of plants, the physiological study of the plants growing in soil was somewhat neglected. Later, when we could develop a system to visualize the movement of element absorption in a plant, there was a clear difference in element absorption between water culture and soil culture.
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Urs, Amog P., V. N. Manjuprasanna, G. V. Rudresha, M. Yariswamy, and B. S. Vishwanath. "Plant Latex Proteases: Natural Wound Healers." In Proteases in Physiology and Pathology, 297–323. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-2513-6_14.

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Shivaprasad, H. V., R. Rajesh, M. Yariswamy, and B. S. Vishwanath. "Procoagulant Properties of Plant Latex Proteases." In Toxins and Hemostasis, 591–603. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9295-3_33.

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Fry, W. E., and E. S. Mizubuti. "Potato late blight." In The Epidemiology of Plant Diseases, 371–88. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-017-3302-1_18.

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Otegui, Marisa S., Rafael Buono, Francisca C. Reyes, and Hannetz Roschzttardtz. "ESCRT-Dependent Sorting in Late Endosomes." In Endocytosis in Plants, 249–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32463-5_13.

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Golonka, Jan, Ashton Embry, and Michał Krobicki. "Late Triassic Global Plate Tectonics." In Topics in Geobiology, 27–57. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68009-5_2.

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Conference papers on the topic "Plante a latex"

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Gonzalez, F., and A. Saldivar. "Accidental mercury spill in the Andes: forensic neuropsychological evaluation six years later." In RAVAGE OF THE PLANET 2006. Southampton, UK: WIT Press, 2006. http://dx.doi.org/10.2495/rav060711.

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Dujoncquoy, E., P. Razin, C. Grélaud, P. Imbert, and G. Dupont. "Evidence of Glacio-eustacy during the Late Berriasian to Late Valanginian: Record in the Lekhwair/Habshan/Salil Prograding Geometries, Rayda Basin, Sultanate of Oman." In Fourth Arabian Plate Geology Workshop. Netherlands: EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20142797.

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Demchuk, Zoriana, Kyle Kingsley, Andriy Voronov, Vasylyna Kirianchuk, Oleg Shevchuk, Ananiy Kohut, and Stanislav Voronov. "Versatile Monomer Platform for Plant Oil-Based Latex Coatings." In The 4th World Congress on New Technologies. Avestia Publishing, 2018. http://dx.doi.org/10.11159/icnfa18.137.

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Vahrenkamp, V., P. Van Laer, K. Leyrer, D. Popa, F. Al Katheeri, P. Razin, and C. Grelaud. "Re-evaluation of the Late Jurassic to Early Cretaceous Stratigraphy of Abu Dhabi." In Fourth Arabian Plate Geology Workshop. Netherlands: EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20142808.

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Monina, Polina, and Aslanbek Naziev. "COMPUTER SUPPORT OF TEACHING PLANE GEOMETRY BY MEANS OF LATEX." In International Conference on Education and New Learning Technologies. IATED, 2017. http://dx.doi.org/10.21125/edulearn.2017.1848.

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Como, Alessandra, Luisa Smeragliuolo Perrotta, and Isotta Forni. "Le Corbusier Roof-Spaces." In LC2015 - Le Corbusier, 50 years later. Valencia: Universitat Politècnica València, 2015. http://dx.doi.org/10.4995/lc2015.2015.960.

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Abstract: From technical solution, the roof-garden became a key spatial theme within Le Corbusier’s work and creativity, evolving to become a fundamental component of his vision for the contemporary city. The roof garden is an open space in which to cultivate both the mind and body, and to experience a direct relationship with nature; through plants, the sky, and the sun, the urban and the natural world are combined together in the surroundings. This article follows the principal steps of Le Corbusier’s research, starting with his initial experimentation in his own apartment studio in rue Nungesser-et-Coli, through to the complex development at the Unité. It follows how the roof garden becomes an optical device toward the horizon and a strong evocative instrument. The relationship with the nature and the horizon are the key of readings of several selected design projects which demonstrate at the same time the continuity of the research and the richness of the variations on the theme itself. The roof garden is one of the most fertile topics of Le Corbusier’s legacy, evident in contemporary architectural developments. Resumen: A partir de una solución técnica, el roof-garden se convierte en el tema central del trabajo y de la poética de Le Corbusier, evolucionando para convertirse en un componente fundamental de su visión de la ciudad contemporánea. El roofgarden es un espacio abierto en el que el hombre puede cultivar la mente y el cuerpo, donde se puede experimentar una relación directa con la naturaleza -la vegetación, a través de las plantas, el cielo, el sol, el urbano -y el mundo natural se combinan juntos en los alrededores. Este texto sigue los pasos principales de la investigación de Le Corbusier , partiendo de las experimentaciones iniciales -en su apartamento-estudio en la rue Nungesser-et-Coli- hasta el complejo desarrollado en la Unité. El texto sigue como el roof garden se convierte en un dispositivo óptico hacia el horizonte y en un gran instrumento evocativo. La relación con la naturaleza y el horizonte son las claves de lectura de varios proyectos seleccionados que muestran a la vez la continuidad de la investigación y la riqueza de las variaciones sobre el tema. El roof garden es uno de los temas más vivos del legado de Le Corbusier, también de gran importancia hoy en la arquitectura contemporánea. Keywords: Roof-garden; Nature; View; Horizon; Landscape. Palabras clave: Roof-garden; Naturaleza; Vista; Horizonte; Paisaje. DOI: http://dx.doi.org/10.4995/LC2015.2015.960
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Memesh, A. M. S., Y. M. Le Nindre, S. M. Dini, and D. Vaslet. "Pre-Buwaib and Late Valanginian Unconformities in Outcrop: Inherited Concepts, Facts, and Stratigraphic Consistency." In Fourth Arabian Plate Geology Workshop. Netherlands: EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20142795.

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Al Eid, Ghazi, and Aus Al Tawil. "High-resolution Sequence Stratigraphy of the Late Permian Khuff-C in Hawiyah, Ghawar Field." In Third Arabian Plate Geology Workshop. Netherlands: EAGE Publications BV, 2011. http://dx.doi.org/10.3997/2214-4609.20144075.

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McCabe, R., I. Gomez-Perez, H. Rawahi, K. Bergmann, T. J. Pearce, J.-M. Dawans, and B. Baloushi. "Elemental Chemostratigraphy of the Late Neoproterozoic & Early Cambrian Sediments in Oman." In Seventh Arabian Plate Geology Workshop: Pre-Cambrian to Paleozoic Petroleum Systems in the Arabian Plate. Netherlands: EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201900214.

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Martínez Medina, Andrés. "Elogio del cuadrado: cuadrícula, cuadro, cuatro, cubo." In LC2015 - Le Corbusier, 50 years later. Valencia: Universitat Politècnica València, 2015. http://dx.doi.org/10.4995/lc2015.2015.837.

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Resumen: Un recorrido por la producción de Le Corbusier evidencia la insistente presencia del cuadrado como base de las composiciones en diversos campos (urbanismo, arquitectura, pintura, mobiliario…) y en diferentes formatos (en planta, alzado y sección, o como marco, módulo y cuadrícula). La presente comunicación realiza un análisis formal (gráfico y simbólico) de sus proyectos y obras, rastreando los modos en que se utiliza el cuadrado permaneciendo en el tiempo como una constante recurrente. Para ello se recorren cuatro áreas temáticas que descienden en escala y en dimensiones: 1) capitolios, 2) museos, 3) pabellones y 4) casas, estudiando una serie de ejemplos en cada área a partir de los planos de la Fundación Le Corbusier, generando discursos que reconstruyen un hilo del tiempo en la evolución de los procesos compositivos. De este modo, se desgrana el empleo del cuadrado, en correspondencia con las áreas de estudio, como: 1º) perímetro de la plaza pública donde insertar las arquitecturas representativas, 2º) marco o caja-fuerte donde encerrar los tesoros artísticos (o sagrados), 3º) volumen cúbico abierto y desmontable y 4º) caja definida por la retícula de la estructura. El cuadrado es siempre un medio y no un fin. Persiste un intento de sugerir algunos de los orígenes en su formación clasicista, sus viajes y sus pinturas. Abstract: A tour through the production of Le Corbusier shows the insistent presence of the square as a basis of compositions in various fields (urban planning, architecture, painting, furniture...) and in different formats (in floor, elevation and profile, or as a theme, module and grid). This communication makes a formal analysis (graphic and symbolic) of its projects and works tracing the different ways to use the square that remains as a recurring constant. We can do it through four thematic areas descending in scale and dimensions: 1) capitols, 2) museums, 3) pavilions and 4) houses, studying a series of examples in each area based on the drawings of the Foundation Le Corbusier, generating speeches that reconstruct a thread of the time in the evolution of the compositional process. In correspondence with the four themes of study, we can discovery the employment of the square as different instruments. First: the square as the perimeter of the public space where to insert the representative architectures. Second: as a frame or safety deposit box where to enclose treasures artistic (or Holy). Third: as a cubic volume open and detachable. Fourth: as box defined by the grid of the structure. The square is always a means and not an end. In addition, there is an attempt to suggest some of the origins in his classic formation, his travels and his paintings. Palabras clave: Le Corbusier, composición, cuadrícula, cuadrado, cuadro, cubo. Keywords: Le Corbusier, composition, reticle, square, frame, cube. DOI: http://dx.doi.org/10.4995/LC2015.2015.837
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Reports on the topic "Plante a latex"

1

Muller, Daren, Alison Robertson, Ethan Stoetzer, Kiersten Wise, Carl Bradley, Albert Tenuta, Marty Chilvers, et al. Foliar Fungicide Decisions for Late-Planted Crops. Ames, IA: Iowa State University Digital Repository, July 2019. http://dx.doi.org/10.31274/cpn-20190729-003.

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Basinger, J. F., M. E. Kotyk, and P. G. Gensel. Early land plants from the Late Silurian-Early Devonian of Bathurst Island, Canadian Arctic Archipelago. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/207431.

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Matthews, J. V., and J. G. Fyles. Late Tertiary plant and arthropod fossils from the high-terrace sediments on Fosheim Peninsula, Ellesmere Island, Nunavut. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/211969.

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Leis, Sherry. Vegetation community monitoring at Lincoln Boyhood National Memorial: 2011–2019. National Park Service, April 2021. http://dx.doi.org/10.36967/nrr-2284711.

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Lincoln Boyhood National Memorial celebrates the lives of the Lincoln family including the final resting place of Abraham’s mother, Nancy Hanks Lincoln. Lincoln’s childhood in Indiana was a formative time in the life our 16th president. When the Lincoln family arrived in Indiana, the property was covered in the oak-hickory forest type. They cleared land to create their homestead and farm. Later, designers of the memorial felt that it was important to restore woodlands to the site. The woodlands would help visitors visualize the challenges the Lincoln family faced in establishing and maintaining their homestead. Some stands of woodland may have remained, but significant restoration efforts included extensive tree planting. The Heartland Inventory and Monitoring Network began monitoring the woodland in 2011 with repeat visits every four years. These monitoring efforts provide a window into the composition and structure of the wood-lands. We measure both overstory trees and the ground flora within four permanently located plots. At these permanent plots, we record each species, foliar cover estimates of ground flora, diameter at breast height of midstory and overstory trees, and tree regeneration frequency (tree seedlings and saplings). The forest species composition was relatively consistent over the three monitoring events. Climatic conditions measured by the Palmer Drought Severity Index indicated mild to wet conditions over the monitoring record. Canopy closure continued to indicate a forest structure with a closed canopy. Large trees (>45 cm DBH) comprised the greatest amount of tree basal area. Sugar maple was observed to have the greatest basal area and density of the 23 tree species observed. The oaks characteristic of the early woodlands were present, but less dominant. Although one hickory species was present, it was in very low abundance. Of the 17 tree species recorded in the regeneration layer, three species were most abundant through time: sugar maple (Acer saccharum), red bud (Cercis canadensis), and ash (Fraxinus sp.). Ash recruitment seemed to increase over prior years and maple saplings transitioned to larger size classes. Ground flora diversity was similar through time, but alpha and gamma diversity were slightly greater in 2019. Percent cover by plant guild varied through time with native woody plants and forbs having the greatest abundance. Nonnative plants were also an important part of the ground flora composition. Common periwinkle (Vinca minor) and Japanese honeysuckle (Lonicera japonica) continued to be the most abundant nonnative species, but these two species were less abundant in 2019 than 2011. Unvegetated ground cover was high (mean = 95%) and increased by 17% since 2011. Bare ground increased from less than 1% in 2011 to 9% in 2019, but other ground cover elements were similar to prior years. In 2019, we quantified observer error by double sampling two plots within three of the monitoring sites. We found total pseudoturnover to be about 29% (i.e., 29% of the species records differed between observers due to observer error). This 29% pseudoturnover rate was almost 50% greater than our goal of 20% pseudoturnover. The majority of the error was attributed to observers overlooking species. Plot frame relocation error likely contributed as well but we were unable to separate it from overlooking error with our design.
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Al-Qadi, Imad, Hasan Ozer, Mouna Krami Senhaji, Qingwen Zhou, Rebekah Yang, Seunggu Kang, Marshall Thompson, et al. A Life-Cycle Methodology for Energy Use by In-Place Pavement Recycling Techniques. Illinois Center for Transportation, October 2020. http://dx.doi.org/10.36501/0197-9191/20-018.

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Worldwide interest in using recycled materials in flexible pavements as an alternative to virgin materials has increased significantly over the past few decades. Therefore, recycling has been utilized in pavement maintenance and rehabilitation activities. Three types of in-place recycling technologies have been introduced since the late 70s: hot in-place recycling, cold in-place recycling, and full-depth reclamation. The main objectives of this project are to develop a framework and a life-cycle assessment (LCA) methodology to evaluate maintenance and rehabilitation treatments, specifically in-place recycling and conventional paving methods, and develop a LCA tool utilizing Visual Basic for Applications (VBA) to help local and state highway agencies evaluate environmental benefits and tradeoffs of in-place recycling techniques as compared to conventional rehabilitation methods at each life-cycle stage from the material extraction to the end of life. The ultimate outcome of this study is the development of a framework and a user-friendly LCA tool that assesses the environmental impact of a wide range of pavement treatments, including in-place recycling, conventional methods, and surface treatments. The developed tool provides pavement industry practitioners, consultants, and agencies the opportunity to complement their projects’ economic and social assessment with the environmental impacts quantification. In addition, the tool presents the main factors that impact produced emissions and energy consumed at every stage of the pavement life cycle due to treatments. The tool provides detailed information such as fuel usage analysis of in-place recycling based on field data.
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Marks, David R. Mute Swans. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, February 2018. http://dx.doi.org/10.32747/2018.7208745.ws.

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Mute swans (Cygnus olor) are an invasive species originally brought to the United States in the late 19th and early 20th centuries for ornamental ponds and lakes, zoos and aviculture collections. Original populations were located in northeastern states along the Hudson Valley but have since expanded to several Midwestern states and portions of the western U.S. and Canada. Mute swan damage includes competing with native waterfowl, destroying native plants, spreading disease, and colliding with aircraft. They are also considered a nuisance in some areas due to their abundant fecal droppings and aggressiveness towards people. Some have questioned the status of mute swans as an introduced species, but multiple reviews by scientists and the U.S. Fish and Wildlife Service clearly support the conclusion that mute swans are not native to North America. The Migratory Bird Treaty Act, therefore, does not protect mute swans, and management authority falls under jurisdiction of the states and Tribes.
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Roschelle, Jeremy, Britte Haugan Cheng, Nicola Hodkowski, Julie Neisler, and Lina Haldar. Evaluation of an Online Tutoring Program in Elementary Mathematics. Digital Promise, April 2020. http://dx.doi.org/10.51388/20.500.12265/94.

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Many students struggle with mathematics in late elementary school, particularly on the topic of fractions. In a best evidence syntheses of research on increasing achievement in elementary school mathematics, Pelligrini et al. (2018) highlighted tutoring as a way to help students. Online tutoring is attractive because costs may be lower and logistics easier than with face-to-face tutoring. Cignition developed an approach that combines online 1:1 tutoring with a fractions game, called FogStone Isle. The game provides students with additional learning opportunities and provides tutors with information that they can use to plan tutoring sessions. A randomized controlled trial investigated the research question: Do students who participate in online tutoring and a related mathematical game learn more about fractions than students who only have access to the game? Participants were 144 students from four schools, all serving low-income students with low prior mathematics achievement. In the Treatment condition, students received 20-25 minute tutoring sessions twice per week for an average of 18 sessions and also played the FogStone Isle game. In the Control condition, students had access to the game, but did not play it often. Control students did not receive tutoring. Students were randomly assigned to condition after being matched on pre-test scores. The same diagnostic assessment was used as a pre-test and as a post-test. The planned analysis looked for differences in gain scores ( post-test minus pre-test scores) between conditions. We conducted a t-test on the aggregate gain scores, comparing conditions; the results were statistically significant (t = 4.0545, df = 132.66, p-value < .001). To determine an effect size, we treated each site as a study in a meta-analysis. Using gain scores, the effect size was g=+.66. A more sophisticated treatment of the pooled standard deviation resulted in a corrected effect size of g=.46 with a 95% confidence interval of [+.23,+.70]. Students who received online tutoring and played the related Fog Stone Isle game learned more; our research found the approach to be efficacious. The Pelligrini et al. (2018) meta-analysis of elementary math tutoring programs found g = .26 and was based largely on face-to-face tutoring studies. Thus, this study compares favorably to prior research on face-to-face mathematics tutoring with elementary students. Limitations are discussed; in particular, this is an initial study of an intervention under development. Effects could increase or decrease as development continues and the program scales. Although this study was planned long before the current pandemic, results are particularly timely now that many students are at home under shelter-in-place orders due to COVID-19. The approach taken here is feasible for students at home, with tutors supporting them from a distance. It is also feasible in many other situations where equity could be addressed directly by supporting students via online tutors.
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Weiss, W. Jason, Chunyu Qiao, Burkan Isgor, and Jan Olek. Implementing Rapid Durability Measure for Concrete Using Resistivity and Formation Factor. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317120.

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The durability of in-place concrete is a high priority issue for concrete pavements and bridges. Several studies have been conducted by INDOT to use electrical resistivity as a measure of fluid transport properties. Resistivity is dependent on the chemistry of the cement and supplementary cementitious system used, as such it has been recommended that rather than specifying resistivity it may be more general to specify the formation factor. Samples were tested to establish the current levels of performance for concrete pavements in the state of Indiana. Temperature and moisture corrections are presented and acceptable accelerated aging procedure is presented. A standardized testing procedure was developed (AASHTO TP 119–Option A) resulting in part from this study that provides specific sample conditioning approaches to address pore solution composition, moisture conditioning, and testing procedures. An accelerated aging procedure is discussed to obtain later age properties (91 days) after only 28 days.
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Planned earlier delivery for late pre-eclampsia may be better for mothers. National Institute for Health Research, November 2019. http://dx.doi.org/10.3310/signal-000838.

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A decade of science support in the sagebrush biome (NOTE: to be released late September 2021). Natural Resources Conservation Service, September 2021. http://dx.doi.org/10.32747/2021.7488985.

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Working Lands for Wildlife (WLFW) invests in science to proactively target conservation investments and quantify outcomes. This report summarizes more than a decade of WLFW science’s current understanding of identified sagebrush biome threats on western working rangelands and how best to address them through voluntary conservation actions. More than 350 plant and animal species are benefitting from this conservation, notably sage grouse, sagebrush songbirds, and migratory big game populations. 61 peer-reviewed publications are referenced in the report that are helping guide targeted conservation of the sage brush biome, conserve core areas, along with scientifically quantifying outcomes.
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