Log in

Relevant bibliographies by topics / Dichaete / Journal articles

To see the other types of publications on this topic, follow the link: Dichaete.

Journal articles on the topic 'Dichaete'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Dichaete.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Soriano, N. S., and S. Russell. "The Drosophila SOX-domain protein Dichaete is required for the development of the central nervous system midline." Development 125, no. 20 (October 15, 1998): 3989–96. http://dx.doi.org/10.1242/dev.125.20.3989.

Full text

Abstract:

SOX-domain proteins are a class of developmentally important transcriptional regulators related to the mammalian testis determining factor SRY. In common with other SOX-domain genes, the Drosophila Dichaete gene has a dynamic expression profile in the developing central nervous system, including cells of the ventral midline. We find defects in the differentiation of midline glia and concomitant axonal defects in Dichaete mutants that are rescued by driving Dichaete expression in the midline. Since Dichaete is required for the correct specification or differentiation of midline glia, we have used the ventral midline as a model system to study SOX gene function in vivo and demonstrate a genetic interaction between Dichaete and the POU domain gene ventral veinless. In mammals, a protein related to Dichaete, SOX2, also interacts with POU transcription factors. The midline phenotypes of Dichaete mutations are rescued by expression of mouse SOX2. Our data suggest that SOX gene structure, function and interactions have been conserved during evolution.

APA, Harvard, Vancouver, ISO, and other styles

2

Zhao, Guoyan, and James B. Skeath. "The Sox-domain containing geneDichaete/fish-hookacts in concert withvndandindto regulate cell fate in theDrosophilaneuroectoderm." Development 129, no. 5 (March 1, 2002): 1165–74. http://dx.doi.org/10.1242/dev.129.5.1165.

Full text

Abstract:

In the Drosophila embryonic central nervous system, neural stem cells, called neuroblasts, acquire fates in a position-specific manner. Recent work has identified a set of genes that functions along the dorsoventral axis to enable neuroblasts that develop in different dorsoventral domains to acquire distinct fates. These genes include the evolutionarily conserved transcription factors ventral nerve cord defective and intermediate neuroblasts defective, as well as the Drosophila EGF receptor. We show that the Sox-domain-containing gene Dichaete/fish-hook also plays a crucial role to pattern the neuroectoderm along the DV axis. Dichaete is expressed in the medial and intermediate columns of the neuroectoderm, and mutant analysis indicates that Dichaete regulates cell fate and neuroblast formation in these domains. Molecular epistasis tests, double mutant analysis and dosage-sensitive interactions demonstrate that during these processes, Dichaete functions in parallel with ventral nerve cord defective and intermediate neuroblasts defective, and downstream of EGF receptor signaling to mediate its effect on development. These results identify Dichaete as an important regulator of dorsoventral pattern in the neuroectoderm, and indicate that Dichaete acts in concert with ventral nerve cord defective and intermediate neuroblasts defective to regulate pattern and cell fate in the neuroectoderm.

APA, Harvard, Vancouver, ISO, and other styles

3

Russell, S. R., N. Sanchez-Soriano, C. R. Wright, and M. Ashburner. "The Dichaete gene of Drosophila melanogaster encodes a SOX-domain protein required for embryonic segmentation." Development 122, no. 11 (November 1, 1996): 3669–76. http://dx.doi.org/10.1242/dev.122.11.3669.

Full text

Abstract:

We have cloned and characterised a member of the High Mobility Group superfamily of genes from Drosophila, Sox70D, which is closely related to the mammalian testis determining gene SRY. Sox70D corresponds to the dominant wing mutation Dichaete. Homozygous deletions of the Sox70D gene and recessive lethal Dichaete alleles have a variable embryonic segmentation phenotype. Dichaete is expressed in early embryos in a dynamic pattern reminiscent of gap and pair-rule genes and is required for the appropriate expression of the primary pair-rule genes even skipped, hairy and runt. The molecular nature of Dichaete and its expression pattern during early embryogenesis suggest that the gene plays a key role in early development; the variability in both the segmentation phenotype and the effects on pair-rule gene expression suggests that this role is to support the transcriptional regulation of key developmental genes rather than directly regulate any one of them.

APA, Harvard, Vancouver, ISO, and other styles

4

Overton, Paul M., Lisa A. Meadows, Joachim Urban, and Steven Russell. "Evidence for differential and redundant function of the Sox genesDichaeteandSoxNduring CNS development inDrosophila." Development 129, no. 18 (September 15, 2002): 4219–28. http://dx.doi.org/10.1242/dev.129.18.4219.

Full text

Abstract:

Group B Sox-domain proteins encompass a class of conserved DNA-binding proteins expressed from the earliest stages of metazoan CNS development. In all higher organisms studied to date, related Group B Sox proteins are co-expressed in the developing CNS; in vertebrates there are three (Sox1, Sox2 and Sox3) and in Drosophila there are two (SoxNeuro and Dichaete). It has been suggested there may be a degree of functional redundancy in Sox function during CNS development. We describe the CNS phenotype of a null mutation in the Drosophila SoxNeuro gene and provide the first direct evidence for both redundant and differential Sox function during CNS development in Drosophila. In the lateral neuroectoderm, where SoxNeuro is uniquely expressed, SoxNeuro mutants show a loss or reduction of achaete expression as well as a loss of many correctly specified lateral neuroblasts. By contrast, in the medial neuroectoderm, where the expression of SoxNeuro and Dichaete overlaps, the phenotypes of both single mutants are mild. In accordance with an at least partially redundant function in that region, SoxNeuro/Dichaete double mutant embryos show a severe neural hypoplasia throughout the central nervous system, as well as a dramatic loss of achaete expressing proneural clusters and medially derived neuroblasts. However, the finding that Dichaete and SoxN exhibit opposite effects on achaete expression within the intermediate neuroectoderm demonstrates that each protein also has region-specific unique functions during early CNS development in the Drosophila embryo.

APA, Harvard, Vancouver, ISO, and other styles

5

Aleksic, Jelena, Enrico Ferrero, Bettina Fischer, Shih Shen, and Steven Russell. "The role of Dichaete in transcriptional regulation during Drosophila embryonic development." BMC Genomics 14, no. 1 (2013): 861. http://dx.doi.org/10.1186/1471-2164-14-861.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Mutsuddi, Mousumi, Ashim Mukherjee, Baohe Shen, James L. Manley, and John R. Nambu. "Drosophila Pelle phosphorylates Dichaete protein andinfluences its subcellular distribution in developing oocytes." International Journal of Developmental Biology 54, no. 8-9 (2010): 1309–15. http://dx.doi.org/10.1387/ijdb.092991mm.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Mukherjee, Ashim, Krishna V. Melnattur, Mao Zhang, and John R. Nambu. "Maternal expression and function of the Drosophila sox gene Dichaete during oogenesis." Developmental Dynamics 235, no. 10 (August 7, 2006): 2828–35. http://dx.doi.org/10.1002/dvdy.20904.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Russell, S. "The Drosophila dominant wing mutation Dichaete results from ectopic expression of a Sox-domain gene." Molecular and General Genetics MGG 263, no. 4 (May 2000): 690–701. http://dx.doi.org/10.1007/s004380051218.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Sánchez-Soriano, Natalia, and Steven Russell. "Regulatory Mutations of the Drosophila Sox Gene Dichaete Reveal New Functions in Embryonic Brain and Hindgut Development." Developmental Biology 220, no. 2 (April 2000): 307–21. http://dx.doi.org/10.1006/dbio.2000.9648.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Ferrero, Enrico, Bettina Fischer, and Steven Russell. "SoxNeuro orchestrates central nervous system specification and differentiation in Drosophila and is only partially redundant with Dichaete." Genome Biology 15, no. 5 (2014): R74. http://dx.doi.org/10.1186/gb-2014-15-5-r74.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Zhao, G., G. Boekhoff-Falk, B. A. Wilson, and J. B. Skeath. "Linking pattern formation to cell-type specification: Dichaete and Ind directly repress achaete gene expression in the Drosophila CNS." Proceedings of the National Academy of Sciences 104, no. 10 (February 26, 2007): 3847–52. http://dx.doi.org/10.1073/pnas.0611700104.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Shen, Shih Pei, Jelena Aleksic, and Steven Russell. "Identifying targets of the Sox domain protein Dichaete in the Drosophila CNS via targeted expression of dominant negative proteins." BMC Developmental Biology 13, no. 1 (2013): 1. http://dx.doi.org/10.1186/1471-213x-13-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Buescher, Marita, Fook Sion Hing, and William Chia. "Formation of neuroblasts in the embryonic central nervous system of Drosophila melanogaster is controlled by SoxNeuro." Development 129, no. 18 (September 15, 2002): 4193–203. http://dx.doi.org/10.1242/dev.129.18.4193.

Full text

Abstract:

Sox proteins form a family of HMG-box transcription factors related to the mammalian testis determining factor SRY. Sox-mediated modulation of gene expression plays an important role in various developmental contexts. Drosophila SoxNeuro, a putative ortholog of the vertebrate Sox1, Sox2 and Sox3 proteins, is one of the earliest transcription factors to be expressed pan-neuroectodermally. We demonstrate that SoxNeuro is essential for the formation of the neural progenitor cells in central nervous system. We show that loss of function mutations of SoxNeuro are associated with a spatially restricted hypoplasia: neuroblast formation is severely affected in the lateral and intermediate regions of the central nervous system, whereas ventral neuroblast formation is almost normal. We present evidence that a requirement for SoxNeuro in ventral neuroblast formation is masked by a functional redundancy with Dichaete, a second Sox protein whose expression partially overlaps that of SoxNeuro. Genetic interactions of SoxNeuro and the dorsoventral patterning genes ventral nerve chord defective and intermediate neuroblasts defective underlie ventral and intermediate neuroblast formation. Finally, the expression of the Achaete-Scute gene complex suggests that SoxNeuro acts upstream and in parallel with the proneural genes.

APA, Harvard, Vancouver, ISO, and other styles

14

Baudouin-Gonzalez, Luis, Anna Schoenauer, Amber Harper, Grace Blakeley, Michael Seiter, Saad Arif, Lauren Sumner-Rooney, Steven Russell, Prashant P. Sharma, and Alistair P. McGregor. "The Evolution of Sox Gene Repertoires and Regulation of Segmentation in Arachnids." Molecular Biology and Evolution 38, no. 8 (March 23, 2021): 3153–69. http://dx.doi.org/10.1093/molbev/msab088.

Full text

Abstract:

Abstract The Sox family of transcription factors regulates many processes during metazoan development, including stem cell maintenance and nervous system specification. Characterizing the repertoires and roles of these genes can therefore provide important insights into animal evolution and development. We further characterized the Sox repertoires of several arachnid species with and without an ancestral whole-genome duplication and compared their expression between the spider Parasteatoda tepidariorum and the harvestman Phalangium opilio. We found that most Sox families have been retained as ohnologs after whole-genome duplication and evidence for potential subfunctionalization and/or neofunctionalization events. Our results also suggest that Sox21b-1 likely regulated segmentation ancestrally in arachnids, playing a similar role to the closely related SoxB gene, Dichaete, in insects. We previously showed that Sox21b-1 is required for the simultaneous formation of prosomal segments and sequential addition of opisthosomal segments in P. tepidariorum. We studied the expression and function of Sox21b-1 further in this spider and found that although this gene regulates the generation of both prosomal and opisthosomal segments, it plays different roles in the formation of these tagmata reflecting their contrasting modes of segmentation and deployment of gene regulatory networks with different architectures.

APA, Harvard, Vancouver, ISO, and other styles

15

Bach, Erika A., Stephane Vincent, Martin P. Zeidler, and Norbert Perrimon. "A Sensitized Genetic Screen to Identify Novel Regulators and Components of the Drosophila Janus Kinase/Signal Transducer and Activator of Transcription Pathway." Genetics 165, no. 3 (November 1, 2003): 1149–66. http://dx.doi.org/10.1093/genetics/165.3.1149.

Full text

Abstract:

Abstract The JAK/STAT pathway exerts pleiotropic effects on a wide range of developmental processes in Drosophila. Four key components have been identified: Unpaired, a secreted ligand; Domeless, a cytokine-like receptor; Hopscotch, a JAK kinase; and Stat92E, a STAT transcription factor. The identification of additional components and regulators of this pathway remains an important issue. To this end, we have generated a transgenic line where we misexpress the upd ligand in the developing Drosophila eye. GMR-upd transgenic animals have dramatically enlarged eye-imaginal discs and compound eyes that are normally patterned. We demonstrate that the enlarged-eye phenotype is a result of an increase in cell number, and not cell volume, and arises from additional mitoses in larval eye discs. Thus, the GMR-upd line represents a system in which the proliferation and differentiation of eye precursor cells are separable. Removal of one copy of stat92E substantially reduces the enlarged-eye phenotype. We performed an F1 deficiency screen to identify dominant modifiers of the GMR-upd phenotype. We have identified 9 regions that enhance this eye phenotype and two specific enhancers: C-terminal binding protein and Daughters against dpp. We also identified 20 regions that suppress GMR-upd and 13 specific suppressors: zeste-white 13, pineapple eye, Dichaete, histone 2A variant, headcase, plexus, kohtalo, crumbs, hedgehog, decapentaplegic, thickveins, saxophone, and Mothers against dpp.

APA, Harvard, Vancouver, ISO, and other styles

16

Overton, P. M., W. Chia, and M. Buescher. "The Drosophila HMG-domain proteins SoxNeuro and Dichaete direct trichome formation via the activation of shavenbaby and the restriction of Wingless pathway activity." Development 134, no. 15 (June 27, 2007): 2807–13. http://dx.doi.org/10.1242/dev.02878.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Valsko, Jefferson José, Amauri Herbert Krahl, Ana Sofia Sousa de Holanda, and Charles Eugene Zartman. "A new species of Dichaea (Orchidaceae) for northern Brazil." Acta Amazonica 44, no. 3 (September 2014): 397–401. http://dx.doi.org/10.1590/1809-4392201305162.

Full text

Abstract:

Dichaea is the largest genus of the subtribe Zygopetalinae and holds it's the highest species diversity in South America. Therefore, this study aims to describe a new species of Dichaea, which occurs in northern Brazil, Dichaea bragae Valsko, Krahl & Holanda. The new species was collected in the north of Manaus in an area of ombrophilous forest and flowered when cultivated. The epithet honors Dr. Pedro Ivo Soares Braga (in memoriam), orchidologist who conducted several studies in the Brazilian Amazon. This new species show a affinity with Dichaea tenuis C. Schweinf., however it is differentiated both vegetatively and on labellum morphology.

APA, Harvard, Vancouver, ISO, and other styles

18

ALOMÍA, YASMIN A., AURELIEN SAMBIN, J. TUPAC OTERO, and PABLO R. STEVENSON. "A NEW SPECIES OF DICHAEA (ORCHIDACEAE: ZYGOPETALINAE) FROM THE ANDES OF COLOMBIA." Phytotaxa 521, no. 1 (September 23, 2021): 39–47. http://dx.doi.org/10.11646/phytotaxa.521.1.4.

Full text

Abstract:

A new species of Dichaea sect. Dichaea from the Andean forests in Colombia is described and illustrated based on living material. Dichaea andina is compared with the morphologically similar D. lagotis and D. pendula, from which it can be distinguished by a number of vegetative and floral and features. Dichaea andina differs from D. lagotis in the broadly anchoriform lip, the hypochile transversely subrounded and the epichile transversely narrowly elliptic, briefly apiculate. Similarly, it differs from D. pendula in the caespitose habit, the leaves without cross-venation, and the inflorescence straight produced below the foliage, among other features. Ecological information for the new species is also provided.

APA, Harvard, Vancouver, ISO, and other styles

19

Hoffmann, L. J., I. Peeken, and K. Lochte. "Effects of iron on the elemental stoichiometry during EIFEX and in the diatoms <i>Fragilariopsis kerguelensis</i> and <i>Chaetoceros dichaeta</i>." Biogeosciences 4, no. 4 (August 1, 2007): 569–79. http://dx.doi.org/10.5194/bg-4-569-2007.

Full text

Abstract:

Abstract. The interaction between iron availability and the phytoplankton elemental composition was investigated during the in situ iron fertilization experiment EIFEX and in laboratory experiments with the Southern Ocean diatom species Fragilariopsis kerguelensis and Chaetoceros dichaeta. Contrary to other in situ iron fertilization experiments we observed an increase in the BSi:POC, BSi:PON, and BSi:POP ratios within the iron fertilized patch during EIFEX. This is possibly caused by a relatively stronger increase in diatom abundance compared to other phytoplankton groups and does not necessarily represent the amount of silicification of single diatom cells. In laboratory experiments with F. kerguelensis and C. dichaeta no changes in the POC:PON, PON:POP, and POC:POP ratios were found with changing iron availability in both species. BSi:POC, BSi:PON, and BSi:POP ratios were significantly lower in the high iron treatments compared to the controls. In F. kerguelensis this was caused by a decrease in cellular BSi concentrations and therefore possibly less silicification. In C. dichaeta no change in cellular BSi concentration was found. Here lower BSi:POC, BSi:PON, and BSi:POP ratios were caused by an increase in cellular C, N, and P under high iron conditions. These results indicate that iron limitation does not always increase silicification in diatoms and that changes in the BSi:POC, BSi:PON, and BSi:POP ratios under iron fertilization in the field are caused by a variety of different mechanisms. Our results therefore imply that simple cause-and-effect relationships are not always applicable for modeling of elemental ratios.

APA, Harvard, Vancouver, ISO, and other styles

20

Hoffmann, L. J., I. Peeken, and K. Lochte. "Effects of iron on the elemental stoichiometry during EIFEX and in the diatoms <i>Fragilariopsis kerguelensis</i> and <i>Chaetoceros dichaeta</i>." Biogeosciences Discussions 4, no. 1 (January 31, 2007): 249–75. http://dx.doi.org/10.5194/bgd-4-249-2007.

Full text

Abstract:

Abstract. The interaction between iron availability and the phytoplankton elemental composition was investigated during the in situ iron fertilization experiment EIFEX and in laboratory experiments with the Southern Ocean diatom species Fragilariopsis kerguelensis and Chaetoceros dichaeta. Contrary to other in situ iron fertilization experiments we observed an increase in the bPSi : POC, bPSi : PON, and bPSi : POP ratios within the iron fertilized patch during EIFEX. This is possibly caused by a relatively stronger increase in diatom abundance compared to other phytoplankton groups and does not necessarily represent the amount of silicification of single diatom cells. In laboratory experiments with F. kerguelensis and C. dichaeta no changes in the POC : PON, PON : POP, and POC : POP ratios were found with changing iron availability in both species. BPSi : POC, bPSi : PON, and bPSi : POP ratios were significantly lower in the high iron treatments compared to the controls. In F. kerguelensis this is caused by a decrease in cellular bPSi concentrations and therefore possibly less silicification. In C. dichaeta no change in cellular bPSi concentration was found. Here lower bPSi : POC, bPSi : PON, and bPSi : POP ratios were caused by an increase in cellular C, N, and P under high iron conditions. We therefore assume that iron limitation does not generally increase silicification of diatoms and that changes in the bPSi : POC, bPSi : PON, and bPSi : POP ratios under iron fertilization in the field are caused by a variety of different mechanisms. These results imply that the effect of iron on nutrient uptake is more complex than hitherto assumed.

APA, Harvard, Vancouver, ISO, and other styles

21

Hoffmann, L. J., I. Peeken, and K. Lochte. "Co-limitation by iron, silicate, and light of three Southern Ocean diatom species." Biogeosciences Discussions 4, no. 1 (January 31, 2007): 209–47. http://dx.doi.org/10.5194/bgd-4-209-2007.

Full text

Abstract:

Abstract. The effect of combined iron, silicate, and light co-limitation was investigated in two Southern Ocean diatom species, Chaetoceros dichaeta and Actinocyclus sp. and one cosmopolitan species, Chaetoceros debilis, all isolated in the Southern Ocean (SO). We found species specific differences in the level of nutrient limitation and its effect on physiological and morphological parameters. Growth of all species tested was clearly co-limited by iron and silicate, reflected in a 4 to 40 times higher increase in cell numbers in the high iron, high silicate treatments compared with the controls. However, the effect of iron and silicate availability on chain length and frustules structures was species specific. Most drastic frustule malformation was found under iron and silicate co-limitation in C. dichaeta while Si limitation caused a strong cell elongation in both Chaetoceros species. Additional a significant increase in chain length was observed in these species under high iron conditions. Therefore, species composition in the SO is likely also indirectly affected by these nutrients via different effects on diatom grazing protection. These morphological changes reflect a potential as biological markers in sediments for the growth history of chain forming species. High light conditions, comparable with light intensities found in the upper 28 m of the SO, showed a negative impact on growth of the endemic species C. dichaeta and Actinocyclus sp. This is in contrast to the assumed light limitation of SO diatoms and indicates an adaptation strategy to the deep mixing and resulting low light conditions in the SO. In contrast to that, the cosmopolitan species C. debilis was not negatively affected by increased light intensity, indicating adaptation to a broader light environment. These results suggest that light limitation of SO phytoplankton due to deep wind mixed layers may play a minor role than hitherto assumed.

APA, Harvard, Vancouver, ISO, and other styles

22

Mas, E., S. Koshimura, A. Suppasri, M. Matsuoka, M. Matsuyama, T. Yoshii, C. Jimenez, F. Yamazaki, and F. Imamura. "Developing Tsunami fragility curves using remote sensing and survey data of the 2010 Chilean Tsunami in Dichato." Natural Hazards and Earth System Sciences 12, no. 8 (August 24, 2012): 2689–97. http://dx.doi.org/10.5194/nhess-12-2689-2012.

Full text

Abstract:

Abstract. On 27 February 2010, a megathrust earthquake of Mw = 8.8 generated a destructive tsunami in Chile. It struck not only Chilean coast but propagated all the way to Japan. After the event occurred, the post-tsunami survey team was assembled, funded by the Japan Science and Technology Agency (JST), to survey the area severely affected by the tsunami. The tsunami damaged and destroyed numerous houses, especially in the town of Dichato. In order to estimate the structural fragility against tsunami hazard in this area, tsunami fragility curves were developed. Surveyed data of inundation depth and visual inspection of satellite images of Dichato were used to classify the damage to housing. A practical method suitable when there are limitations on available data for numerical simulation or damage evaluation from surveys is presented here. This study is the first application of tsunami fragility curves on the South American Pacific coast and it might be of practical use for communities with similar characteristics along the west Pacific coast. The proposed curve suggests that structures in Dichato will be severely damaged – with a 68% probability – already at 2 m tsunami inundation depth.

APA, Harvard, Vancouver, ISO, and other styles

23

Oliveira, Odilson Dos Santos, Zaida Inês Antoniolli, and Ana Beatriz Zago de Moraes. "Ocorrência de agentes fúngicos Pestolotia dichaeta Speg. em povoamentos de Eucalyptus spp." Ciência Florestal 1, no. 1 (March 30, 2003): 40. http://dx.doi.org/10.5902/19805098255.

Full text

Abstract:

No laboratorio de Fitopatologia da UFSM, foi isolado e identificado o patógeno Pestalotia dichaeta Spreg., oriundo de plantas atacadas das espécies Eucalyptus dunnii Maiden., E. viminalis Labill. e E. nitens Maiden., coletadas em Canoinhas, SC. Para confirmação do agente causal, mudas sadias de E. viminalis Labill., com 60 cm de altura, foram inoculadas com uma solução de esporos do agente isolado e, após algumas semanas, folhas e ramos destas foram isolados, confirmando-se a identificação do agente. Trata-se de um fungo não agressivo, pois o plantio atacado, após alguns meses, recuperava-se rapidamente.

APA, Harvard, Vancouver, ISO, and other styles

24

Pupulin, F., and A. P. Karremans. "A new and unusual species of Dichaea (Orchidaceae: Zygopetalinae) from Costa Rica." Blumea - Biodiversity, Evolution and Biogeography of Plants 65, no. 1 (July 3, 2020): 61–64. http://dx.doi.org/10.3767/blumea.2020.65.01.06.

Full text

Abstract:

A new and florally unusual species of the genus Dichaea is described and illustrated from Costa Rica, where it is apparently endemic, and its relationships are discussed. Dichaea auriculata is compared with the group of species close to D. graminoides, from which it can be distinguished by the lip with a long isthmus, provided with two rounded auricles at the base, instead of the sessile lip typical of the group. It is also compared with another Costa Rican endemic in the same complex, D. gracillima, from which it can be distinguished by the autogamous, mostly cleistogamous, flowers, the3-lobed lip with rounded basal lobes, the high keel along the lip isthmus, and the bifid ligule of the column. Notes on the habitat and the ecology of the new species are provided.

APA, Harvard, Vancouver, ISO, and other styles

25

Harris, R. "University of Concepcion Marine Station, Dichato, Chile." Journal of Plankton Research 32, no. 8 (June 7, 2010): 1103–4. http://dx.doi.org/10.1093/plankt/fbq065.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Gogorev, R. M. "Morphology and taxonomy of the Chaetocerotales species (Bacillariophyta) from the Antarctic Ocean." Novosti sistematiki nizshikh rastenii 46 (2012): 18–35. http://dx.doi.org/10.31111/nsnr/2012.46.18.

Full text

Abstract:

New data on morphology and taxonomy of 22 species of the order Сhaetocerotales Round et al. emend. Gogorev 2011, namely 20 species of the genus Chaetoceros and 2 species of the genus Attheya from the East Antarctic Ocean are presented. New SEM data on morphology of Chaetoceros bulbosus (Ehr.) Heiden, C. hendeyi Manguin, C. natatus Manguin, C. neglectus Karsten and C. schimperianus Karsten are firstly obtained. New combination of C. dichaeta var. tenuicornis comb. et stat. nov. is proposed. The findings of C. convolutus Castr. in the Antarctic Ocean confirm idea on its bipolar distribution. Thespecies of the genus Chaetoceros mainly dominate in near-ice and plankton assemblages.

APA, Harvard, Vancouver, ISO, and other styles

27

KRAHL, AMAURI HERBERT, JEFFERSON JOSÉ VALSKO, ANA SOFIA SOUSA DE HOLANDA, and GUY CHIRON. "A new species of Dichaea (Orchidaceae) from Brazil with special reference to its foliar anatomy." Phytotaxa 265, no. 2 (June 14, 2016): 145. http://dx.doi.org/10.11646/phytotaxa.265.2.6.

Full text

Abstract:

A new Dichaea species is described. It shows an ovate an ovate, non-clawed lip, a feature up to now never observed in the genus that separates it from all related species. The species has been observed only in the Central Amazon.

APA, Harvard, Vancouver, ISO, and other styles

28

Dressler, Robert L., Franco Pupulin, and James P. Folsom. "Three New Mesoamerican Taxa of Dichaea with Caducous Leaves." Novon: A Journal for Botanical Nomenclature 16, no. 3 (September 2006): 336–43. http://dx.doi.org/10.3417/1055-3177(2006)16[336:tnmtod]2.0.co;2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Timmermans, KR, MS Davey, B. van der Wagt, J. Snoek, RJ Geider, MJW Veldhuis, LJA Gerringa, and HJW de Baar. "Co-limitation by iron and light of Chaetoceros brevis, C. dichaeta and C. calcitrans (Bacillariophyceae)." Marine Ecology Progress Series 217 (2001): 287–97. http://dx.doi.org/10.3354/meps217287.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Yaacob, Mohd Muhridza, and Malik Abdulrazzaq Alsaedi. "Partial Dicharge Signal Analysis in Insulation Oil Using Optical Chromatic Technique." Applied Mechanics and Materials 530-531 (February 2014): 332–35. http://dx.doi.org/10.4028/www.scientific.net/amm.530-531.332.

Full text

Abstract:

In this work optical chromatic approch has been use to analyze PD signals in insulation oil. The study of chromatic approach of acoustic emission for PD phenomenon addressing PD signals with three detectors red, green and blue (R,G,B) having non-orthogonal (overlapping) responses. The outputs of the three detectors are transformed into a number of chromatic parameters designated x, y, z as well as hue, lightness and saturation (H,L,S). The x, y, z represents the proportion of the signal from each of the three processors while H, L, S represents the dominant phase, effective strength and notional spread of the PD signals respectively. This technique provides a high degree of traceability in relating the chromatic parameters to the raw PD signals. Changes in the values of the chromatic parameters are shown to reflect various PD trends and to provide early indications of incipient insulation failure and PD source discrimination.

APA, Harvard, Vancouver, ISO, and other styles

31

Assmy, Philipp, David U. Hernández-Becerril, and Marina Montresor. "MORPHOLOGICAL VARIABILITY AND LIFE CYCLE TRAITS OF THE TYPE SPECIES OF THE DIATOM GENUSCHAETOCEROS,C. DICHAETA." Journal of Phycology 44, no. 1 (February 2008): 152–63. http://dx.doi.org/10.1111/j.1529-8817.2007.00430.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

MACGOWAN, IAIN. "Definition of the Lonchaea polyhamata species-group (Diptera, Lonchaeidae) with a description of new species." Zootaxa 4446, no. 3 (July 18, 2018): 325. http://dx.doi.org/10.11646/zootaxa.4446.3.2.

Full text

Abstract:

The Lonchaea polyhamata McAlpine, 1964 species-group is defined and five new species within it are described from the Afrotropical region namely, L. dama MacGowan sp. nov., L. mbeya MacGowan sp. nov., L. njombe MacGowan sp. nov., L. taita MacGowan sp. nov. and L. zomba MacGowan sp. nov. With the inclusion of the previously described L. polyhamata McAlpine, 1964 and L. teratosa McAlpine, 1964 the species group now comprises seven species, all from the Afrotropics.Afrotropical Lonchaea species which share character of 2 katepisternal setae with the L. polyhamata species group are also assessed. These include three new species namely L. aberdare MacGowan sp. nov., L. klynebergi MacGowan sp. nov. and L. muhavura MacGowan sp. nov. The male terminalia of the previously described L. dichaeta McAlpine, 1964 which also belongs to this wider group are illustrated for the first time.The male genitalia of all species are illustrated and a key to males of Afrotropical Lonchaea with two katepisternal setae is provided.

APA, Harvard, Vancouver, ISO, and other styles

33

Chevailler, Laurent, and Joseph Ticon. "Une dynastie de juristes savoyards : les Dichat de Toisinge." Le Globe. Revue genevoise de géographie 125, no. 1 (1985): 91–103. http://dx.doi.org/10.3406/globe.1985.1199.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Aránguiz, Rafael, Luisa Urra, Ryo Okuwaki, and Yuji Yagi. "Development and application of a tsunami fragility curve of the 2015 tsunami in Coquimbo, Chile." Natural Hazards and Earth System Sciences 18, no. 8 (August 10, 2018): 2143–60. http://dx.doi.org/10.5194/nhess-18-2143-2018.

Full text

Abstract:

Abstract. The last earthquake that affected the city of Coquimbo took place in September 2015 and had a magnitude of Mw=8.3, resulting in localized damage in low-lying areas of the city. In addition, another seismic gap north of the 2015 earthquake rupture area has been identified; therefore, a significant earthquake (Mw=8.2 to 8.5) and tsunami could occur in the near future. The present paper develops a tsunami fragility curve for the city of Coquimbo based on field survey data and tsunami numerical simulations. The inundation depth of the 2015 Chile tsunami in Coquimbo was estimated by means of numerical simulation with the Non-hydrostatic Evolution of Ocean WAVEs (NEOWAVE) model and five nested grids with a maximum grid resolution of 10 m. The fragility curve exhibited behavior similar to that of other curves in flat areas in Japan, where little damage was observed at relatively high inundation depths. In addition, it was observed that Coquimbo experienced less damage than Dichato (Chile); in fact, at an inundation depth of 2 m, Dichato had a ∼75 % probability of damage, while Coquimbo proved to have only a 20 % probability. The new fragility curve was used to estimate the damage by possible future tsunamis in the area. The damage assessment showed that ∼50 % of the structures in the low-lying area of Coquimbo have a high probability of damage in the case of a tsunami generated off the coast of the study area if the city is rebuilt with the same types of structures.

APA, Harvard, Vancouver, ISO, and other styles

35

PUPULIN, FRANCO. "DICHAEA VIRIDULA (ORCHIDACEAE: ZYGOPETALINAE), A NEW SPECIES IN THE D. TENUIFOLIA COMPLEX." Harvard Papers in Botany 10, no. 1 (2005): 83. http://dx.doi.org/10.3100/1043-4534(2005)10[83:dvozan]2.0.co;2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Lü Peng, 吕鹏, 刘春芳 Liu Chunfang, 张潮海 Zhang Chaohai, 赵永蓬 Zhao Yongpeng, 王骐 Wang Qi, and 贾兴 Jia Xing. "Experimental study on main pulse power supply for dicharge produced plasma extreme ultraviolet source." High Power Laser and Particle Beams 22, no. 2 (2010): 388–92. http://dx.doi.org/10.3788/hplpb20102202.0388.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Davies, Kevin L., and Malgorzata Stpiczyńska. "Labellar Micromorphology of Two Euglossine-pollinated Orchid Genera; Scuticaria Lindl. and Dichaea Lindl." Annals of Botany 102, no. 5 (September 3, 2008): 805–24. http://dx.doi.org/10.1093/aob/mcn155.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Oliveira, Virginia del Carmen, and Maria das Graças Sajo. "Morfo-anatomia caulinear de nove espécies de Orchidaceae." Acta Botanica Brasilica 15, no. 2 (August 2001): 177–88. http://dx.doi.org/10.1590/s0102-33062001000200004.

Full text

Abstract:

Foram analisados sob o ponto de vista morfo-anatômico os sistemas caulinares (caule aéreo, rizoma e pseudobulbo) de nove espécies de Orchidaceae (Catasetum fimbriatum, Dichaea bryophila, Encyclia calamara, Epidendrum campestre, Epidendrum secundum, Miltonia flavescens, Pleurothallis smithiana, Stanhopea lietzei e Vanda tricolor). Comparando-se as espécies foi possível reconhecer uma certa uniformidade na organização interna dessas estruturas. Os rizomas e caules aéreos são revestidos por epiderme unisseriada, apresentam córtex parenquimático e feixes vasculares colaterais distribuídos em dois ou mais anéis no cilindro central. Os pseudobulbos possuem epiderme unisseriada recoberta por espessa cutícula e feixes vasculares colaterais distribuídos irregularmente no tecido parenquimático fundamental, que é formado por células grandes e pequenas com grande quantidade de espaços intercelulares.

APA, Harvard, Vancouver, ISO, and other styles

39

Escorcia Oyola, O., R. García Alvarado, M. Trebilcock Kelly, F. Celis, E. Echeverría, and R. Sánchez. "Validación del reacondicionamiento térmico de viviendas para la reconstrucción pos-terremoto 2010: Dichato, Chile." Revista de la construcción 12, no. 2 (November 2013): 54–71. http://dx.doi.org/10.4067/s0718-915x2013000200005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Domaneschi, Omar. "Anatomia funcional de Gari solida (Gray, 1828) (Bivalvia: Psammobiidae) do litoral de Dichato, Chile." Boletim de Zoologia 15, no. 15 (November 8, 1991): 41. http://dx.doi.org/10.11606/issn.2526-3358.bolzoo.1991.122701.

Full text

Abstract:

Gari solida (Cray, 1828) ocorre em quase toda extensão da Província Malacológica Peruana, onde vive enterrada na areia ou cascalho da zona infralitorânea. A abundância de indivíduos em certas áreas de distribuição daespécie permite sua exploração econômica como alimento, o que justifica a necessidade de estudos sobre a sua biologia e de esforços no sentido de se evitar sua dizimação. Como contribuição ao conhecimento de G. solida, o autor descreve em detalhes a concha, manto, sifões, pé e respectiva musculatura, órgãos da cavidade do manto e trato digestivo. Especial atenção é dada ao funcionamento dos órgãos da cavidade do manto e ao conteúdo estomacal. Os sifões são típicos dos Tellinacea, sendo relativamente curtos mas amplos e guarnecidos por tentáculos simples. Os ctenídios, do tipo C(2) de Atkins (1937), são intensamente pregueados, heterorrábdicos, com a crista das pregas posteriores praticamente duplicadas em forma de "Y" e cada uma das demibrânquias possuindo um sulco marginal evidente. Os palpos são muito pequenos, comparados ao tamanho dos ctenídios e a relação entre ambos pertence à categoria III de Stasek (1963). Falta a prega adicional do manto que forma o canal de rejeição de pseudofezes. 0 saco do estilete e o intestino são unidos, a parte livre deste último sendo muito longa e enovelada. 0 estômago, tipo V de Purchon (1960), apresentou-se praticamente preenchido por uma massa viscosa, englobando muito material amorfo, marrom-esverdeado e partículas pouco densas, ambos preponderando sobre o material tipicamente de fundo. A comparação da anatomia funcional de G. solida com a de outros Psammobiidae conhecidos, permitiu a constatação das adaptações da espécie para viver em ambientes de águas calmas, com pequenos distúrbios do sedimento, e alimentar-se predominantemente do material em suspensão.

APA, Harvard, Vancouver, ISO, and other styles

41

Neubig, Kurt M., Norris H. Williams, W. Mark Whitten, and Franco Pupulin. "Molecular phylogenetics and the evolution of fruit and leaf morphology of Dichaea (Orchidaceae: Zygopetalinae)." Annals of Botany 104, no. 3 (January 30, 2009): 457–67. http://dx.doi.org/10.1093/aob/mcp004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Oportus, Maximiliano, Rodrigo Cienfuegos, Alejandro Urrutia, Rafael Aránguiz, Patricio A. Catalán, and Matías A. Hube. "Ex post analysis of engineered tsunami mitigation measures in the town of Dichato, Chile." Natural Hazards 103, no. 1 (May 11, 2020): 367–406. http://dx.doi.org/10.1007/s11069-020-03992-z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Syahrullail, Samion, M. Daud Razak, Norzahir Sapawe, Azli Yahya, and Nugroho Kartiko. "Effect of Low Current for Machining Pit Using Electrical Discharge Machine." Applied Mechanics and Materials 554 (June 2014): 180–84. http://dx.doi.org/10.4028/www.scientific.net/amm.554.180.

Full text

Abstract:

Electric Discharge Machining Die sinker (EDM DS) is an established technology for surface modification. In this study, experiment were conducted using electrical discharge machine die sinker ZNC to investigate the effect of low pulse current rates to produce pits on SKD 11 (tool steel). Various parameters are considered during machining such as pulse current, gap voltage and dicharge time. Experiments were performed by three pulsed current levels (0.5A, 1.5A and 3.0A). The hollow copper rod as electrode with diameter 0.5mm is used to make spark surface of SKD 11. The experimental result reveals that the pit shape of a surface SKD 11 is significant to low pulse currents. For qualitative analysis, a distinction diameter pits and shapes represented with different low pulsed current. Overall, this study shows that presence of pits of surface embedded on the handle tool and machinery part will improve the existing technology available in surface modification.

APA, Harvard, Vancouver, ISO, and other styles

44

Paolini, Italo. "Follow-up of ischemic cardiopathy, an essential moment in the communication between in-patient and out-patient setting: problems and opportunities." Clinical Management Issues 2, no. 4 (December 15, 2008): 169–79. http://dx.doi.org/10.7175/cmi.v2i4.563.

Full text

Abstract:

It is known that the transition from the inpatient to the outpatient setting is a critical time. Evidence suggests that contact between patients and providers (i.e., physicians, nurse practitioners, and physician assistants) during this interval may be crucial for appropriate treatment modifications and recognition of errors in treatment. Ambulatory follow-up provides opportunities for clinical assessment, patient education, and medication review, which may in turn improve outcomes. However, little is known about the appropriate timing and type of follow-up that is necessary following hospitalization for AMI. In Italian System of Heath contact between general pratictioner and specialists, after dicharge, is critical moment for management of chronic pharmacological and non pharmacological therapy. If professional approaches are not integrated can reduce patients compliance and effectiveness of therapies themselves. Good management of chronic cardiovascular disease requires attention to stenghtening the continuity of information and management of patients.

APA, Harvard, Vancouver, ISO, and other styles

45

Degtyarev, Maksim I., Iurii M. Lebedev, Ksenia G. Kuznetsova, and Konstantin B. Gongalsky. "A history of study and new records of terrestrial enchytraeids (Annelida, Clitellata, Enchytraeidae) from the Russian Far East." ZooKeys 955 (August 5, 2020): 79–96. http://dx.doi.org/10.3897/zookeys.955.53106.

Full text

Abstract:

A list of terrestrial enchytraeids of the Russian Far East is compiled based on literature and extensive field data collected by the authors in 2019. A database has been created consisting of geographic coordinates, habitat type, species, and data source. For some species collected by the authors, barcoding using COI, 16s, and 12s rRNA genes has been performed. In total, there are at least 62 species of enchytraeids belonging to 12 genera. Seven species (Achaeta macroampullacea, Cognettia sphagnetorum, Enchytraeus dichaetus, Fridericia cusanica, Globulidrilus riparius, Marionina southerni, Mesenchytraeus gigachaetus) are reported in the Russian Far East for the first time. Cognettia sphagnetorum and F. cusanica are most probably introduced. Taxonomic and biogeographical remarks on some of the species found and differences from the original descriptions are provided. Some of the specimens may be undescribed species, but this requires a more in-depth examination. The Russian Far East, especially its southeastern part, is of great interest as a possible location for new species of enchytraeids.

APA, Harvard, Vancouver, ISO, and other styles

46

Ali, Ramadan, Joachim Mogdans, and Horst Bleckmann. "Responses of Medullary Lateral Line Units of the Goldfish,Carassius auratus, to Amplitude-Modulated Sinusoidal Wave Stimuli." International Journal of Zoology 2010 (2010): 1–14. http://dx.doi.org/10.1155/2010/762621.

Full text

Abstract:

This paper describes the responses of brainstem lateral line units in goldfish,Carassius auratus, to constant-amplitude and to amplitude-modulated sinusoidal water motions. If stimulated with constant-amplitude sinusoidal water motions, units responded with phasic (50%) or with sustained (50%) increases in dicharge rate. Based on isodisplacement curves, units preferred low (33 Hz, 12.5%), mid (50 Hz, 10% and 100 Hz, 30%) or high (200 Hz, 47.5%) frequencies. In most units, responses were weakly phase locked to the carrier frequency. However, at a carrier frequency of 50 Hz or 100 Hz, a substantial proportion of the units exhibited strong phase locking. If stimulated with amplitude-modulated water motions, units responded with a burst of discharge to each modulation cycle, that is, units phase locked to the amplitude modulation frequency. Response properties of brainstem units were in many respects comparable to those of midbrain units, suggesting that they emerge first in the lateral line brainstem.

APA, Harvard, Vancouver, ISO, and other styles

47

Garde, Elena, Guillermo Pérez, Gerardo Acosta-Jamett, and Barend Bronsvoort. "Characteristics of a Canine Distemper Virus Outbreak in Dichato, Chile Following the February 2010 Earthquake." Animals 3, no. 3 (August 27, 2013): 843–54. http://dx.doi.org/10.3390/ani3030843.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Rahman, Shahinoor. "Coastal Community Resilience to Tsunami: A Study on Planning Capacity and Social Capacity, Dichato, Chile." IOSR Journal Of Humanities And Social Science 12, no. 6 (2013): 55–63. http://dx.doi.org/10.9790/0837-1265563.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Maruyama, Yoshihisa, Fumio Yamazaki, Shizuko Matsuzaki, Hiroyuki Miura, and Miguel Estrada. "Evaluation of Building Damage and Tsunami Inundation Based on Satellite Images and GIS Data following the 2010 Chile Earthquake." Earthquake Spectra 28, no. 1_suppl1 (June 2012): 165–78. http://dx.doi.org/10.1193/1.4000023.

Full text

Abstract:

This paper presents the results of a field survey conducted by the authors after the 2010 Chile earthquake. The authors visited the affected area about a month after the earthquake. The usefulness of satellite images captured after the earthquake to detect damaged buildings in Concepción is discussed, compared with the field photos taken by the authors. GIS datasets for the damage levels of buildings in Talca and the tsunami-inundated areas in Talcahuano, Dichato, and Constitución are constructed in this study. The GIS dataset for the damage levels of buildings in Talca is compared with the satellite images, and the possibility of detecting damage to adobe houses is investigated. Further, a series of fundamental analyses are performed using a digital elevation model (DEM) that is constructed from ASTER images (ERSDAC 2009), and the usefulness of the DEM is evaluated comparing with the field survey results.

APA, Harvard, Vancouver, ISO, and other styles

50

Cao, Kun Jian, Li Wang, Lin Ci Li, and Guang Chuan Liang. "Effects of Al₂O₃ Coating on the Structural and Electrochemical Performance of LiNi_0.5Co_0.2Mn_0.3O₂ Cathode Material." Applied Mechanics and Materials 320 (May 2013): 235–40. http://dx.doi.org/10.4028/www.scientific.net/amm.320.235.

Full text

Abstract:

The pristine LiNi0.5Co0.2Mn0.3O2cathode material particles were successfully coated with Al2O3via a heterogeneous nucleation process and subsequent heat-treatment. The structure and electrochemical properties of Al2O3-coated LiNi0.5Co0.2Mn0.3O2were characterized by XRD and constant-current charge/discharge cycling tests. It was found that the Al2O3coating did not alter the crystal structure of the cathode material. The Al2O3coating layer had a negative influence on the dicharge specific capacity and a positive effect on the cycling performance. The decreased discharge capacity of the coated sample can be attributed to the poor clectronic and ionic conductivity of Al2O3layer, which interfered the Li+intercaltion/deintercaltion into/from the cathode material. The enhanced cycling performance can be ascribed to the suppression of the dissolution of transition metal ions by the HF acid in the eletrolyte and the side reations between electrode and electrolyte by the Al2O3coating layer. The 2wt.% Al2O3-coated sample exhibits the optimal overall electrochemical performance, with discharge specific capacities of 157.0, 137.1 mAh/g at 0.2C and 3C rate, and capacity cycling retention rates of 97.34, 93.53% after 20 & 50 cycles, respectively.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!