140 research outputs found

    Predicting uncertainty and risk in the natural sciences: bridging the gap between academics and industry

    Get PDF
    The increase in large-scale disasters in recent years, such as the 2007 floods in the UK, has caused disruptions of livelihood, enormous economic losses and increase in fatalities. Losses from natural hazards are only partially derived from the physical event itself but are also caused by society’s vulnerability to it. In the first three months of 2010, an unprecedented US$16 billion in losses occurred from natural hazards caused by events such as the Haiti and Chilean earthquakes, and the European storm Xynthia. This made it the worst ever first quarter for natural hazard losses and left the insurance industry exposed financially to the more loss-prone third and forth quarters. NERC science has a central role to play in the forecasting and mitigation of natural hazards. Research in this area forms the basis for technological solutions to early warning systems, designing mitigation strategies and providing critical information for decision makers to help save lives and avoid economic losses. Understanding uncertainty is essential if reliable forecasting and risk assessments are to be made. However, the quantification and assessment of uncertainty in natural hazards has in general been limited particularly in terms of model limitations and multiplicity. There are several reasons for this; most notably the fragmented nature of natural hazard research which is split both across science areas and between research, risk management and policy. Because of this, each sector has developed its own concepts and language which has acted as a barrier for effective communication and prevented the production of generic methods that have the potential to be used across sectors. It is clear therefore that by bringing the natural hazard community together significant breakthroughs in the visualisation and understanding of risk and uncertainty could be achieved. To accomplish this, this research programme has 4 prime objectives: 1.To improve communication and networking between researchers and risk managers within the financial services sector 2.To provide a platform for the dissemination of information on uncertainty and risk analysis between a range of researchers and practitioners 3.To generate a portfolio of best practice in uncertainty and risk analysis 4.To act as a focal point between the financial sector and natural hazard research in NERC This paper will discuss how the Natural Environmental Research Council, in partnership with other organisations such as TSB, EA and EPSRC etc, is working with academics and industry to bring about a step change in the way that uncertainty and risk assessments are achieved throughout the natural hazard community

    Social Networks, Learning, and Flexibility: Sourcing Scientific Knowledge in New Biotechnology Firms

    Get PDF
    We examine how two highly successful new biotechnology firms (NBFs) source their most critical input -- scientific knowledge. We find that scientists at the two NBFs enter into large numbers of collaborative research efforts with scientists at other organizations, especially universities. Formal market contracts are rarely used to govern these exchanges of scientific knowledge. Our findings suggest that the use of boundary-spanning social networks by the two NBFs increases both their learning and their flexibility in ways that would not be possible within a self-contained hierarchical organization.

    Ariel - Volume 2 Number 8

    Get PDF
    Editors Richard J. Bonanno Robin A. Edwards Associate Editors Steven Ager Stephen Flynn Shep Dickman Tom Williams Lay-out Editor Eugenia Miller Contributing Editors Michael J. Blecker Milton Packe James J. Nocon Lynne Porter Editors Emeritus Delvyn C. Case, Jr. Paul M. Fernhof

    Ariel - Volume 2 Number 7

    Get PDF
    Editors Richard J. Bonanno Robin A. Edwards Associate Editors Steven Ager Stephen Flynn Shep Dickman Tom Williams Lay-out Editor Eugenia Miller Contributing Editors Michael J. Blecker W. Cherry Light James J. Nocon Lynne Porter Editors Emeritus Delvyn C. Case, Jr. Paul M. Fernhof

    Ariel - Volume 2 Number 6

    Get PDF
    Editors Richard J. Bonanno Robin A. Edwards Associate Editors Steven Ager Stephen Flynn Shep Dickman Tom Williams Lay-out Editor Eugenia Miller Contributing Editors Michael J. Blecker W. Cherry Light James J. Nocon Lynne Porter Editors Emeritus Delvyn C. Case, Jr. Paul M. Fernhof

    The Influence of Culture on Breast-Feeding Decisions by African American and White Women

    Get PDF
    Abstract: The purpose of this study was to examine how culture influenced breast-feeding decisions in African American and white women, using the Theory of Culture Care Diversity and Universality as a framework. One hundred eighty-six participants responded to the following: The word culture means beliefs and traditions passed down by your family and friends. How has culture affected how you plan to feed your baby? Qualitative content analysis was used to analyze the data. Four categories of responses were identified: influences of family, known benefits of breast-feeding, influences of friends, and personal choice. The findings suggest that race alone may not be as influential in infant feeding decisions as other factors. Although some women acknowledged the effect of their cultural background and experiences, most women reported that their culture did not affect their infant feeding decision. In this population, breastfeeding decisions were based on the influences of family, friends, self, and the perceived knowledge of breast-feeding benefits. Although breast-feeding statistics are commonly reported by race, cultural influences on infant feeding decisions may transcend race and include the influence of family and friends, learned information from impersonal sources, and information that is shared and observed from other people. Keywords: African American | Breast-feeding | White | Culture Article: Healthy People 2010 had 2 major goals: (a) increase the quality and years of healthy life and (b) eliminate health disparities. Increasing the proportion of mothers who initiate breast-feeding was one of the focus areas of Healthy People 2010 and it continues to be a focus in Healthy Peopl

    The prevalence and origin of exoprotease-producing cells in the <em>Bacillus subtilis </em>biofilm

    Get PDF
    Biofilm formation by the Gram-positive bacterium Bacillus subtilis is tightly controlled at the level of transcription. The biofilm contains specialized cell types that arise from controlled differentiation of the resident isogenic bacteria. DegU is a response regulator that controls several social behaviours exhibited by B. subtilis including swarming motility, biofilm formation and extracellular protease (exoprotease) production. Here, for the first time, we examine the prevalence and origin of exoprotease-producing cells within the biofilm. This was accomplished using single-cell analysis techniques including flow cytometry and fluorescence microscopy. We established that the number of exoprotease-producing cells increases as the biofilm matures. This is reflected by both an increase at the level of transcription and an increase in exoprotease activity over time. We go on to demonstrate that exoprotease-producing cells arise from more than one cell type, namely matrix-producing and non-matrix-producing cells. In toto these findings allow us to add exoprotease-producing cells to the list of specialized cell types that are derived during B. subtilis biofilm formation and furthermore the data highlight the plasticity in the origin of differentiated cells

    Functional specialization of duplicated AP3-like genes in Medicago truncatula

    Get PDF
    This is the accepted version of the following article: Roque, E., Serwatowska, J., Cruz Rochina, M., Wen, J., Mysore, K. S., Yenush, L., Beltrán, J. P. and Cañas, L. A. (2013), Functional specialization of duplicated AP3-like genes in Medicago truncatula. Plant J, 73: 663–675 , which has been published in final form at http://dx.doi.org/10.1111/tpj.12068The Bclass of MADS box genes has been studied in a wide range of plant species, but has remained largely uncharacterized in legumes. Here we investigate the evolutionary fate of the duplicated AP3-like genes of a legume species. To obtain insight into the extent to which B-class MADS box gene functions are conserved or have diversified in legumes, we isolated and characterized the two members of the AP3 lineage in Medicago truncatula: MtNMH7 and MtTM6 (euAP3 and paleoAP3 genes, respectively). A non-overlapping and complementary expression pattern of both genes was observed in petals and stamens. MtTM6 was expressed predominantly in the outer cell layers of both floral organs, and MtNMH7 in the inner cell layers of petals and stamens. Functional analyses by reverse genetics approaches (RNAi and Tnt1 mutagenesis) showed that the contribution of MtNMH7 to petal identity is more important than that of MtTM6, whereas MtTM6 plays a more important role in stamen identity than its paralog MtNMH7. Our results suggest that the M.truncatula AP3-like genes have undergone a functional specialization process associated with complete partitioning of gene expression patterns of the ancestral gene lineage. We provide information regarding the similarities and differences in petal and stamen development among core eudicots.This work was funded by grants BIO2006-09374 and BIO2009-08134 from the Spanish Ministry of Science and Innovation. We are gratefully to Mario A. Fares and Santiago F. Elena (Instituto de Biologia Molecular y Celular de Plantas, Valencia, Spain) for helpful comments and bioinformatics support. The collaboration and assistance of Rafael Martinez-Pardo in the greenhouse is gratefully acknowledged.Roque Mesa, EM.; Serwatowska, J.; Rochina Peñalver, MC.; Wen, J.; Mysore, KS.; Yenush, L.; Beltran Porter, JP.... (2013). Functional specialization of duplicated AP3-like genes in Medicago truncatula. The Plant Journal. 73(4):663-675. doi:10.1111/tpj.12068S663675734Altschul, S. (1997). Gapped BLAST and PSI-BLAST: a new generation of protein database search programs. Nucleic Acids Research, 25(17), 3389-3402. doi:10.1093/nar/25.17.3389Aoki, S., Uehara, K., Imafuku, M., Hasebe, M., & Ito, M. (2004). Phylogeny and divergence of basal angiosperms inferred from APETALA3- and PISTILLATA-like MADS-box genes. Journal of Plant Research, 117(3). doi:10.1007/s10265-004-0153-7Baum, D. (2002). Response: Missing links: the genetic architecture of flower and floral diversification. Trends in Plant Science, 7(1), 31-34. doi:10.1016/s1360-1385(01)02181-1A., B., K., K., A., F., C., V., M.-A., L., H., S., & G., T. (2002). A novel MADS-box gene subfamily with a sister-group relationship to class B floral homeotic genes. Molecular Genetics and Genomics, 266(6), 942-950. doi:10.1007/s00438-001-0615-8Benlloch, R., d’ Erfurth, I., Ferrandiz, C., Cosson, V., Beltrán, J. P., Cañas, L. A., … Ratet, P. (2006). Isolation of mtpim Proves Tnt1 a Useful Reverse Genetics Tool in Medicago truncatula and Uncovers New Aspects of AP1-Like Functions in Legumes. Plant Physiology, 142(3), 972-983. doi:10.1104/pp.106.083543Benlloch, R., Roque, E., Ferrándiz, C., Cosson, V., Caballero, T., Penmetsa, R. V., … Madueño, F. (2009). Analysis of B function in legumes: PISTILLATA proteins do not require the PI motif for floral organ development inMedicago truncatula. The Plant Journal, 60(1), 102-111. doi:10.1111/j.1365-313x.2009.03939.xBerbel, A., Navarro, C., Ferrándiz, C., Cañas, L. A., Beltrán, J.-P., & Madueño, F. (2005). Functional Conservation of PISTILLATA Activity in a Pea Homolog Lacking the PI Motif. Plant Physiology, 139(1), 174-185. doi:10.1104/pp.104.057687Bowman, J. L., Smyth, D. R., & Meyerowitz, E. M. (1989). Genes directing flower development in Arabidopsis. The Plant Cell, 1(1), 37-52. doi:10.1105/tpc.1.1.37Broholm, S. K., Pöllänen, E., Ruokolainen, S., Tähtiharju, S., Kotilainen, M., Albert, V. A., … Teeri, T. H. (2009). Functional characterization of B class MADS-box transcription factors in Gerbera hybrida. Journal of Experimental Botany, 61(1), 75-85. doi:10.1093/jxb/erp279Cheng, X., Wen, J., Tadege, M., Ratet, P., & Mysore, K. S. (2010). Reverse Genetics in Medicago truncatula Using Tnt1 Insertion Mutants. Plant Reverse Genetics, 179-190. doi:10.1007/978-1-60761-682-5_13Coen, E. S., & Meyerowitz, E. M. (1991). The war of the whorls: genetic interactions controlling flower development. Nature, 353(6339), 31-37. doi:10.1038/353031a0Coronado, C., Zuanazzi, J., Sallaud, C., Quirion, J. C., Esnault, R., Husson, H. P., … Ratet, P. (1995). Alfalfa Root Flavonoid Production Is Nitrogen Regulated. Plant Physiology, 108(2), 533-542. doi:10.1104/pp.108.2.533Dellaporta, S. L., Wood, J., & Hicks, J. B. (1983). A plant DNA minipreparation: Version II. Plant Molecular Biology Reporter, 1(4), 19-21. doi:10.1007/bf02712670Drea, S., Hileman, L. C., de Martino, G., & Irish, V. F. (2007). Functional analyses of genetic pathways controlling petal specification in poppy. Development, 134(23), 4157-4166. doi:10.1242/dev.013136D’ Erfurth, I., Cosson, V., Eschstruth, A., Lucas, H., Kondorosi, A., & Ratet, P. (2003). Efficient transposition of theTnt1tobacco retrotransposon in the model legumeMedicago truncatula. The Plant Journal, 34(1), 95-106. doi:10.1046/j.1365-313x.2003.01701.xFerr�ndiz, C., Navarro, C., G�mez, M. D., Ca�as, L. A., & Beltr�n, J. P. (1999). Flower development inPisum sativum: From the war of the whorls to the battle of the common primordia. Developmental Genetics, 25(3), 280-290. doi:10.1002/(sici)1520-6408(1999)25:33.0.co;2-3Geuten, K., & Irish, V. (2010). Hidden Variability of Floral Homeotic B Genes in Solanaceae Provides a Molecular Basis for the Evolution of Novel Functions. The Plant Cell, 22(8), 2562-2578. doi:10.1105/tpc.110.076026Goto, K., & Meyerowitz, E. M. (1994). Function and regulation of the Arabidopsis floral homeotic gene PISTILLATA. Genes & Development, 8(13), 1548-1560. doi:10.1101/gad.8.13.1548Heard, J., & Dunn, K. (1995). Symbiotic induction of a MADS-box gene during development of alfalfa root nodules. Proceedings of the National Academy of Sciences, 92(12), 5273-5277. doi:10.1073/pnas.92.12.5273Hecht, V., Foucher, F., Ferrándiz, C., Macknight, R., Navarro, C., Morin, J., … Weller, J. L. (2005). Conservation of Arabidopsis Flowering Genes in Model Legumes. Plant Physiology, 137(4), 1420-1434. doi:10.1104/pp.104.057018The evolution of functionally novel proteins after gene duplication. (1994). Proceedings of the Royal Society of London. Series B: Biological Sciences, 256(1346), 119-124. doi:10.1098/rspb.1994.0058Irish, V. F. (2006). Duplication, Diversification, and Comparative Genetics of Angiosperm MADS‐Box Genes. Advances in Botanical Research, 129-161. doi:10.1016/s0065-2296(06)44003-9Jack, T., Fox, G. L., & Meyerowitz, E. M. (1994). Arabidopsis homeotic gene APETALA3 ectopic expression: Transcriptional and posttranscriptional regulation determine floral organ identity. Cell, 76(4), 703-716. doi:10.1016/0092-8674(94)90509-6Kim, S., Yoo, M.-J., Albert, V. A., Farris, J. S., Soltis, P. S., & Soltis, D. E. (2004). Phylogeny and diversification of B-function MADS-box genes in angiosperms: evolutionary and functional implications of a 260-million-year-old duplication. American Journal of Botany, 91(12), 2102-2118. doi:10.3732/ajb.91.12.2102Kramer, E. M., & Irish, V. F. (2000). Evolution of the Petal and Stamen Developmental Programs: Evidence from Comparative Studies of the Lower Eudicots and Basal Angiosperms. International Journal of Plant Sciences, 161(S6), S29-S40. doi:10.1086/317576Kramer, E. M., Di Stilio, V. S., & Schlüter, P. M. (2003). Complex Patterns of Gene Duplication in the APETALA3 and PISTILLATA Lineages of the Ranunculaceae. International Journal of Plant Sciences, 164(1), 1-11. doi:10.1086/344694Kramer, E. M., Su, H.-J., Wu, C.-C., & Hu, J.-M. (2006). BMC Evolutionary Biology, 6(1), 30. doi:10.1186/1471-2148-6-30Lamb, R. S., & Irish, V. F. (2003). Functional divergence within the APETALA3/PISTILLATA floral homeotic gene lineages. Proceedings of the National Academy of Sciences, 100(11), 6558-6563. doi:10.1073/pnas.0631708100Liu, Y., Nakayama, N., Schiff, M., Litt, A., Irish, V. F., & Dinesh-Kumar, S. P. (2004). Virus Induced Gene Silencing of a DEFICIENS Ortholog in Nicotiana Benthamiana. Plant Molecular Biology, 54(5), 701-711. doi:10.1023/b:plan.0000040899.53378.83De Martino, G., Pan, I., Emmanuel, E., Levy, A., & Irish, V. F. (2006). Functional Analyses of Two Tomato APETALA3 Genes Demonstrate Diversification in Their Roles in Regulating Floral Development. The Plant Cell, 18(8), 1833-1845. doi:10.1105/tpc.106.042978Ohno, S. (1970). Evolution by Gene Duplication. doi:10.1007/978-3-642-86659-3Páez-Valencia, J., Sánchez-Gómez, C., Valencia-Mayoral, P., Contreras-Ramos, A., Hernández-Lucas, I., Orozco-Segovia, A., & Gamboa-deBuen, A. (2008). Localization of the MADS domain transcriptional factor NMH7 during seed, seedling and nodule development of Medicago sativa. Plant Science, 175(4), 596-603. doi:10.1016/j.plantsci.2008.06.008Pnueli, L., Abu-Abeid, M., Zamir, D., Nacken, W., Schwarz-Sommer, Z., & Lifschitz, E. (1991). The MADS box gene family in tomato: temporal expression during floral development, conserved secondary structures and homology with homeotic genes fromAntirrhinumandArabidopsis. The Plant Journal, 1(2), 255-266. doi:10.1111/j.1365-313x.1991.00255.xRiechmann, J. L., Krizek, B. A., & Meyerowitz, E. M. (1996). Dimerization specificity of Arabidopsis MADS domain homeotic proteins APETALA1, APETALA3, PISTILLATA, and AGAMOUS. Proceedings of the National Academy of Sciences, 93(10), 4793-4798. doi:10.1073/pnas.93.10.4793Rijpkema, A. S., Royaert, S., Zethof, J., van der Weerden, G., Gerats, T., & Vandenbussche, M. (2006). Analysis of the Petunia TM6 MADS Box Gene Reveals Functional Divergence within the DEF/AP3 Lineage. The Plant Cell, 18(8), 1819-1832. doi:10.1105/tpc.106.042937Schwarz-Sommer, Z., Hue, I., Huijser, P., Flor, P. J., Hansen, R., Tetens, F., … Sommer, H. (1992). Characterization of the Antirrhinum floral homeotic MADS-box gene deficiens: evidence for DNA binding and autoregulation of its persistent expression throughout flower development. The EMBO Journal, 11(1), 251-263. doi:10.1002/j.1460-2075.1992.tb05048.xSoltis, P. S., Brockington, S. F., Yoo, M.-J., Piedrahita, A., Latvis, M., Moore, M. J., … Soltis, D. E. (2009). Floral variation and floral genetics in basal angiosperms. American Journal of Botany, 96(1), 110-128. doi:10.3732/ajb.0800182Sommer, H., Beltrán, J. P., Huijser, P., Pape, H., Lönnig, W. E., Saedler, H., & Schwarz-Sommer, Z. (1990). Deficiens, a homeotic gene involved in the control of flower morphogenesis in Antirrhinum majus: the protein shows homology to transcription factors. The EMBO Journal, 9(3), 605-613. doi:10.1002/j.1460-2075.1990.tb08152.xStellari, G. M., Jaramillo, M. A., & Kramer, E. M. (2004). Evolution of the APETALA3 and PISTILLATA Lineages of MADS-Box–Containing Genes in the Basal Angiosperms. Molecular Biology and Evolution, 21(3), 506-519. doi:10.1093/molbev/msh044Tadege, M., Ratet, P., & Mysore, K. S. (2005). Insertional mutagenesis: a Swiss Army knife for functional genomics of Medicago truncatula. Trends in Plant Science, 10(5), 229-235. doi:10.1016/j.tplants.2005.03.009Tadege, M., Wen, J., He, J., Tu, H., Kwak, Y., Eschstruth, A., … Mysore, K. S. (2008). Large-scale insertional mutagenesis using the Tnt1 retrotransposon in the model legume Medicago truncatula. The Plant Journal, 54(2), 335-347. doi:10.1111/j.1365-313x.2008.03418.xTamura, K., Dudley, J., Nei, M., & Kumar, S. (2007). MEGA4: Molecular Evolutionary Genetics Analysis (MEGA) Software Version 4.0. Molecular Biology and Evolution, 24(8), 1596-1599. doi:10.1093/molbev/msm092Taylor, S., Hofer, J., & Murfet, I. (2001). Stamina pistilloida, the Pea Ortholog of Fim and UFO, Is Required for Normal Development of Flowers, Inflorescences, and Leaves. The Plant Cell, 13(1), 31-46. doi:10.1105/tpc.13.1.31Theissen, G., & Melzer, R. (2007). Molecular Mechanisms Underlying Origin and Diversification of the Angiosperm Flower. Annals of Botany, 100(3), 603-619. doi:10.1093/aob/mcm143Tröbner, W., Ramirez, L., Motte, P., Hue, I., Huijser, P., Lönnig, W. E., … Schwarz-Sommer, Z. (1992). GLOBOSA: a homeotic gene which interacts with DEFICIENS in the control of Antirrhinum floral organogenesis. The EMBO Journal, 11(13), 4693-4704. doi:10.1002/j.1460-2075.1992.tb05574.xTucker, S. C. (2003). Floral Development in Legumes. Plant Physiology, 131(3), 911-926. doi:10.1104/pp.102.017459Urbanus, S. L., de Folter, S., Shchennikova, A. V., Kaufmann, K., Immink, R. G., & Angenent, G. C. (2009). In planta localisation patterns of MADS domain proteins during floral development in Arabidopsis thaliana. BMC Plant Biology, 9(1), 5. doi:10.1186/1471-2229-9-5Vandenbussche, M., Zethof, J., Royaert, S., Weterings, K., & Gerats, T. (2004). The Duplicated B-Class Heterodimer Model: Whorl-Specific Effects and Complex Genetic Interactions in Petunia hybrida Flower Development. The Plant Cell, 16(3), 741-754. doi:10.1105/tpc.019166Wesley, S. V., Helliwell, C. A., Smith, N. A., Wang, M., Rouse, D. T., Liu, Q., … Waterhouse, P. M. (2001). Construct design for efficient, effective and high-throughput gene silencing in plants. The Plant Journal, 27(6), 581-590. doi:10.1046/j.1365-313x.2001.01105.xWu, C., Ma, Q., Yam, K.-M., Cheung, M.-Y., Xu, Y., Han, T., … Chong, K. (2005). In situ expression of the GmNMH7 gene is photoperiod-dependent in a unique soybean (Glycine max [L.] Merr.) flowering reversion system. Planta, 223(4), 725-735. doi:10.1007/s00425-005-0130-
    corecore