Journal articles: 'Sqh'

1

Zeng, Haiyan, Cheng Zhi Liu, Qishan Zhao, Xing Liu, Qian Liu, and Dan Wang. "The Research on Sequence Stratigraphy of Shahezi Formation in Xujiaweizi Depression." Advanced Materials Research 787 (September 2013): 651–54. http://dx.doi.org/10.4028/www.scientific.net/amr.787.651.

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By using the data of core, geological log and seism and the theory of sedimentology and sequence stratigraphy , the sequence of Shahezi formation in Xujiaweizi depression are divided into five third-order sequence, they are SQ1, SQ2, SQ3, SQ4 and SQ5 up towards. The range of SQ1 is limited, influenced by palaeogeomorphology. SQ5 are greatly influenced by the late sedimentary denudation, now only in the northwest of the study area can be seen, other part is missing in this layer. SQ1, SQ2, SQ3 are onlap filled. There are defective area in SQ4 and SQ5.

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Tian, Zhenqi, Yan Zhang, Chao Ma, Hongsong Chen, Jianying Guo, and Zhongshi Zhou. "Silencing the Myosin Regulatory Light Chain Gene sqh Reduces Cold Hardiness in Ophraella communa LeSage (Coleoptera: Chrysomelidae)." Insects 11, no. 12 (November 28, 2020): 844. http://dx.doi.org/10.3390/insects11120844.

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Ambrosia artemisiifolia is a noxious invasive alien weed, that is harmful to the environment and human health. Ophraella communa is a biocontrol agent for A. artemisiifolia, that was accidentally introduced to the Chinese mainland and has now spread throughout southern China. Recently, we found that upon artificial introduction, O. communa can survive in northern China as well. Therefore, it is necessary to study the cold hardiness of O. communa. Many genes have been identified to play a role in cold-tolerance regulation in insects, but the function of the gene encoding non-muscle myosin regulatory light chain (MRLC-sqh) remains unknown. To evaluate the role played by MRLC-sqh in the cold-tolerance response, we cloned and characterized MRLC-sqh from O. communa. Quantitative real-time PCR revealed that MRLC-sqh was expressed at high levels in the gut and pupae of O. communa. The expression of MRLC-sqh was shown to decrease after cold shock between 10 and 0 °C and ascend between 0 and −10 °C, but these did not show a positive association between MRLC-sqh expression and cold stress. Silencing of MRLC-sqh using dsMRLC-sqh increased the chill-coma recovery time of these beetles, suggesting that cold hardiness was reduced in its absence. These results suggest that the cold hardiness of O. communa may be partly regulated by MRLC-sqh. Our findings highlight the importance of motor proteins in mediating the cold response in insects.

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Maia, Renata Moreira da Costa, Antonio Tadeu dos Reis, Eliane da Costa Alves, Cleverson Guizan Silva, Josefa Varela Guerra, Christian Gorini, Adalberto Silva, and Rodrigo Arantes-Oliveira. "Architecture and stratigraphic framework of shelf sedimentary systems off Rio de Janeiro state, Northern Santos Basin-Brazil." Brazilian Journal of Oceanography 58, spe1 (2010): 15–29. http://dx.doi.org/10.1590/s1679-87592010000500003.

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Seismic analysis of sparker lines of GEOMAR cruises allowed us to address a first stratigraphic scenario for the shallow sedimentary record (~300 msec) of the continental shelf off Rio de Janeiro State, northern Santos basin. Two sets of seismic sequences were identified and interpreted as a succession of depositional sequences induced by repeated glacioeustatic cycles. Depositional sequences composing Set I (SqA-SqC) are dominantly sigmoidal, reflecting periods of increasing accommodation space that favoured the preservation of both aggradational and progradational units; sequences of Set II (Sq1-Sq5) are essentially seaward-thickening stacks of forced-regression wedges, implying periods of declining accommodation space. Comparison between seismic lines and chronostratigraphic data allowed the mapped sequences to be placed within the Plio-Quaternary. Correlations also suggest that most of Set I (SqA and lower portion of SqB) was deposited during the Pliocene (undifferentiated Pliocene), while the upper portion of sequence SqC and sequences of Set II (Sq1-Sq5) have been placed within the Quaternary. Correlation of chronostratigraphic data with δ18O isotopic "sea level curves" also supports the hypothesis that sequences Sq1-Sq4 are fourth-order forced-regression sequences that record 100-120 kyr glacioeustatic cycles for the last 440-500 kyr, while sedimentary units labeled Sq5 would represent the transgressive and highstand deposition during the Holocene.

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Falayi, E. O., O. O. Ogundile, J. O. Adepitan, and A. A. Okusanya. "Solar quiet variation of the horizontal and vertical components of geomagnetic field using wavelet analysis." Canadian Journal of Physics 97, no. 4 (April 2019): 450–60. http://dx.doi.org/10.1139/cjp-2018-0034.

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The solar quiet (Sq) variations of horizontal and vertical (SqH and SqZ) components of the geomagnetic field obtained from both the Northern Hemisphere and Southern Hemisphere of the International Real-Time Magnetic Observatory Network (INTERMAGNET) during solar maximum year 2001 were investigated. The results show enlargement of the SqH component of the geomagnetic field during the daytime, attributed to equatorial electrojet (EEJ) current closer to the geomagnetic equator at the electrojet stations (BNG and MBO), which are produced from large eastward flow of the current. It was observed that SqZ is positive at the southward and negative at the northward hemispheres. SqZ is amplified at HER and HBK around the daytime. Wavelet power spectrum based approach was employed to analyse the SqH, SqZ, and rate of induction (SqZ/SqH) time series in a sequence of time scaling from January to December. The higher energy of SqH and SqZ of the wavelet coefficients is noticeable at high frequency. The monthly variation rate of induction (SqZ/SqH) analyses during the Sq variations are associated with the influence of equatorwards penetration of electric fields from the field-aligned current, Earth conductivity, effect of the ocean, and ionospheric conductivity.

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Jordan, Pascale, and Roger Karess. "Myosin Light Chain–activating Phosphorylation Sites Are Required for Oogenesis in Drosophila." Journal of Cell Biology 139, no. 7 (December 29, 1997): 1805–19. http://dx.doi.org/10.1083/jcb.139.7.1805.

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The Drosophila spaghetti squash (sqh) gene encodes the regulatory myosin light chain (RMLC) of nonmuscle myosin II. Biochemical analysis of vertebrate nonmuscle and smooth muscle myosin II has established that phosphorylation of certain amino acids of the RMLC greatly increases the actin-dependent myosin ATPase and motor activity of myosin in vitro. We have assessed the in vivo importance of these sites, which in Drosophila correspond to serine-21 and threonine-20, by creating a series of transgenes in which these specific amino acids were altered. The phenotypes of the transgenes were examined in an otherwise null mutant background during oocyte development in Drosophila females. Germ line cystoblasts entirely lacking a functional sqh gene show severe defects in proliferation and cytokinesis. The ring canals, cytoplasmic bridges linking the oocyte to the nurse cells in the egg chamber, are abnormal, suggesting a role of myosin II in their establishment or maintenance. In addition, numerous aggregates of myosin heavy chain accumulate in the sqh null cells. Mutant sqh transgene sqh-A20, A21 in which both serine-21 and threonine-20 have been replaced by alanines behaves in most respects identically to the null allele in this system, with the exception that no heavy chain aggregates are found. In contrast, expression of sqh-A21, in which only the primary phosphorylation target serine-21 site is altered, partially restores functionality to germ line myosin II, allowing cystoblast division and oocyte development, albeit with some cytokinesis failure, defects in the rapid cytoplasmic transport from nurse cells to cytoplasm characteristic of late stage oogenesis, and some damaged ring canals. Substituting a glutamate for the serine-21 (mutant sqh-E21) allows oogenesis to be completed with minimal defects, producing eggs that can develop normally to produce fertile adults. Flies expressing sqh-A20, in which only the secondary phosphorylation site is absent, appear to be entirely wild type. Taken together, this genetic evidence argues that phosphorylation at serine-21 is critical to RMLC function in activating myosin II in vivo, but that the function can be partially provided by phosphorylation at threonine-20.

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Edwards, K. A., and D. P. Kiehart. "Drosophila nonmuscle myosin II has multiple essential roles in imaginal disc and egg chamber morphogenesis." Development 122, no. 5 (May 1, 1996): 1499–511. http://dx.doi.org/10.1242/dev.122.5.1499.

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Morphogenesis is characterized by orchestrated changes in the shape and position of individual cells. Many of these movements are thought to be powered by motor proteins. However, in metazoans, it is often difficult to match specific motors with the movements they drive. The nonmuscle myosin II heavy chain (MHC encoded by zipper is required for cell sheet movements in Drosophila embryos. To determine if myosin II is required for other processes, we examined the phenotypes of strong and weak larval lethal mutations in spaghetti squash (sqh), which encodes the nonmuscle myosin II regulatory light chain (RLC). sqh mutants can be rescued to adulthood by daily induction of a sqh cDNA transgene driven by the hsp70 promoter. By transiently ceasing induction of the cDNA, we depleted RLC at specific times during development. When RLC is transiently depleted in larvae, the resulting adult phenotypes demonstrate that RLC is required in a stage-specific fashion for proper development of eye and leg imaginal discs. When RLC is depleted in adult females, oogenesis is reversibly disrupted. Without RLC induction, developing egg chambers display a succession of phenotypes that demonstrate roles for myosin II in morphogenesis of the interfollicular stalks, three morphologically and mechanistically distinct types of follicle cell migration, and completion of nurse cell cytoplasm transport (dumping). Finally, we show that in sqh mutant tissues, MHC is abnormally localized in punctate structures that do not contain appreciable amounts of filamentous actin or the myosin tail-binding protein p127. This suggests that sqh mutant phenotypes are chiefly caused by sequestration of myosin into inactive aggregates. These results show that myosin II is responsible for a surprisingly diverse array of cell shape changes throughout development.

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Sechi, Stefano, Anna Frappaolo, Angela Karimpour-Ghahnavieh, Roberta Fraschini, and Maria Grazia Giansanti. "A novel coordinated function of Myosin II with GOLPH3 controls centralspindlin localization during cytokinesis in Drosophila." Journal of Cell Science 133, no. 21 (October 9, 2020): jcs252965. http://dx.doi.org/10.1242/jcs.252965.

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ABSTRACTIn animal cell cytokinesis, interaction of non-muscle myosin II (NMII) with F-actin provides the dominant force for pinching the mother cell into two daughters. Here we demonstrate that celibe (cbe) is a missense allele of zipper, which encodes the Drosophila Myosin heavy chain. Mutation of cbe impairs binding of Zipper protein to the regulatory light chain Spaghetti squash (Sqh). In dividing spermatocytes from cbe males, Sqh fails to concentrate at the equatorial cortex, resulting in thin actomyosin rings that are unable to constrict. We show that cbe mutation impairs localization of the phosphatidylinositol 4-phosphate [PI(4)P]-binding protein Golgi phosphoprotein 3 (GOLPH3, also known as Sauron) and maintenance of centralspindlin at the cell equator of telophase cells. Our results further demonstrate that GOLPH3 protein associates with Sqh and directly binds the centralspindlin subunit Pavarotti. We propose that during cytokinesis, the reciprocal dependence between Myosin and PI(4)P–GOLPH3 regulates centralspindlin stabilization at the invaginating plasma membrane and contractile ring assembly.

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Vereshchagina, Natalia, Daimark Bennett, Balázs Szöőr, Jasmin Kirchner, Sascha Gross, Emese Vissi, Helen White-Cooper, and Luke Alphey. "The Essential Role of PP1β in Drosophila Is to Regulate Nonmuscle Myosin." Molecular Biology of the Cell 15, no. 10 (October 2004): 4395–405. http://dx.doi.org/10.1091/mbc.e04-02-0139.

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Reversible phosphorylation of myosin regulatory light chain (MRLC) is a key regulatory mechanism controlling myosin activity and thus regulating the actin/myosin cytoskeleton. We show that Drosophila PP1β, a specific isoform of serine/threonine protein phosphatase 1 (PP1), regulates nonmuscle myosin and that this is the essential role of PP1β. Loss of PP1β leads to increased levels of phosphorylated nonmuscle MRLC (Sqh) and actin disorganisation; these phenotypes can be suppressed by reducing the amount of active myosin. Drosophila has two nonmuscle myosin targeting subunits, one of which (MYPT-75D) resembles MYPT3, binds specifically to PP1β, and activates PP1β's Sqh phosphatase activity. Expression of a mutant form of MYPT-75D that is unable to bind PP1 results in elevation of Sqh phosphorylation in vivo and leads to phenotypes that can also be suppressed by reducing the amount of active myosin. The similarity between fly and human PP1β and MYPT genes suggests this role may be conserved.

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Neubueser, Dagmar, and David R. Hipfner. "Overlapping Roles of Drosophila Drak and Rok Kinases in Epithelial Tissue Morphogenesis." Molecular Biology of the Cell 21, no. 16 (August 15, 2010): 2869–79. http://dx.doi.org/10.1091/mbc.e10-04-0328.

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Dynamic regulation of cytoskeletal contractility through phosphorylation of the nonmuscle Myosin-II regulatory light chain (MRLC) provides an essential source of tension for shaping epithelial tissues. Rho GTPase and its effector kinase ROCK have been implicated in regulating MRLC phosphorylation in vivo, but evidence suggests that other mechanisms must be involved. Here, we report the identification of a single Drosophila homologue of the Death-associated protein kinase (DAPK) family, called Drak, as a regulator of MRLC phosphorylation. Based on analysis of null mutants, we find that Drak broadly promotes proper morphogenesis of epithelial tissues during development. Drak activity is largely redundant with that of the Drosophila ROCK orthologue, Rok, such that it is essential only when Rok levels are reduced. We demonstrate that these two kinases synergistically promote phosphorylation of Spaghetti squash (Sqh), the Drosophila MRLC orthologue, in vivo. The lethality of drak/rok mutants can be rescued by restoring Sqh activity, indicating that Sqh is the critical common effector of these two kinases. These results provide the first evidence that DAPK family kinases regulate actin dynamics in vivo and identify Drak as a novel component of the signaling networks that shape epithelial tissues.

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10

Yu, Ying Hua, Hong Qi Yuan, and Zi Xue Guo. "Sedimentary Characteristics in Zhalainuoer Group in Cano Depression Hailaer Basin." Advanced Materials Research 652-654 (January 2013): 2515–19. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.2515.

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Based on the theory of sequence stratigraphy, sequence stratigraphy framework of is established in this paper by comprehensively search of core, logging and 3-D seismic data. Zhalainuoer group in Cano Depression is divided into 5 3rd-order sequences: Sq1、Sq2、Sq3、Sq4、Sq5 from down to up. Based on the division and comparison of sequence formation, the sedimentary facies and the depositional system are proposed to study in the paper, and the main depositional systems are detailed explained. The distribution of these depositional systems is controlled by the sequence framework.

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Zhang, Lei, Xue Juan Zhang, Yong Man, Jianjun Xu, and Zhi Ru Yang. "The Analysis of Sedimentary Evolution Mode of Denglouku-Formation in Gulong Area of Songliao Basin." Advanced Materials Research 652-654 (January 2013): 2501–7. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.2501.

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By making use of the datum of seismic, drilling, logging and cores, this thesis conducted a study on the sequence stratigraphic framework and sedimentary characteristics of Denglouku-Formation in Gulong area, and analysed the sedimentary evolution mode of Denglouku Formation in Gulong area. The results show that Denglouku Formation in Gulong area can be divided into one supersequence Ⅰ, four third-order sequences (Sq1-Sq4). The depositional systems developed in Denglouku Formation in Gulong area mainly include alluvial fan, fan delta, sublacustrine fan, fluvial facies, braided river delta, shallow water delta, and lake sediment and so on. The distribution features and sedimentary evolution pattern of depositional systems of each third-order sequence are significant difference. The formations of Sq2 and lower Sq1 are controlled by rift faulting and their characteristics of sedimentary filling conform to the continental faulted basin sedimentary evolution mode. Sq3 and Sq4 formation and upper formation of Sq2 have characteristics of depression sequence stratigraphic. The upper formation of Sq2 and Sq3 formation belong to the "river - shallow delta" sedimentary model of depression basin. And Sq4 formation conforms to the “flood-overlake” model in depression basin in droughty climate.

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Breitenbach, Tim, and Alfio Borzì. "On the SQH Scheme to Solve Nonsmooth PDE Optimal Control Problems." Numerical Functional Analysis and Optimization 40, no. 13 (April 27, 2019): 1489–531. http://dx.doi.org/10.1080/01630563.2019.1599911.

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13

Wheatley, S., S. Kulkarni, and R. Karess. "Drosophila nonmuscle myosin II is required for rapid cytoplasmic transport during oogenesis and for axial nuclear migration in early embryos." Development 121, no. 6 (June 1, 1995): 1937–46. http://dx.doi.org/10.1242/dev.121.6.1937.

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The X-linked Drosophila gene spaghetti squash (sqh) encodes the regulatory light chain of nonmuscle myosin II. To assess the requirement for myosin II in oogenesis and early embryogenesis, we induced homozygous germline clones of the hypomorphic mutation sqh1 in otherwise heterozygous mothers. Developing oocytes in such sqh1 germline clones often failed to attain full size due to a defect in ‘dumping’, the rapid phase of cytoplasmic transport from nurse cells. In contrast to other dumpless mutants described to date, sqh1 egg chambers showed no evidence of ring canal obstruction, and no obvious alteration in the actin network. However the distribution of myosin II was abnormal. We conclude that the molecular motor responsible for cytoplasmic dumping is supplied largely, if not exclusively, by nurse cell myosin II and we suggest that regulation of myosin activity is one means by which cytoplasmic transport may be controlled during oocyte development. The eggs resulting from sqh1 clones, though smaller than normal, began development but exhibited an early defect in axial migration of cleavage nuclei towards the posterior pole of the embryo, in a similar manner to that seen in early cleavage eggs in which the actin cytoskeleton is disrupted. Thus both nurse cell dumping and axial migration require a maternally supplied myosin II.

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Liu, Chunying, Yue Xiong, Jing Feng, Lei Zhang, and Yun Zhao. "Sqh is involved in the regulation of Ci stability in Hh signaling pathway." Journal of Molecular Cell Biology 7, no. 6 (October 30, 2015): 584–87. http://dx.doi.org/10.1093/jmcb/mjv063.

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O'brien, Jim, and Janet Draper. "Developing Effective School Leaders? Initial Views of the Scottish Qualification for Headship (SQH)." Journal of In-service Education 27, no. 1 (March 1, 1999): 109–22. http://dx.doi.org/10.1080/13674580100200168.

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Zhu, Xiaomin, Shunli Li, Jiawang Ge, Dakang Zhong, Qin Zhang, and Defa Ge. "Paleogene sequence framework and depositional systems in the Sunda and Asri Basins, Indonesia." Interpretation 6, no. 2 (May 1, 2018): T377—T391. http://dx.doi.org/10.1190/int-2017-0121.1.

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Based on seismic reflection characteristics, lithologic associations, and basin structure evolution stages, the Banuwati Formation, Zelda and Gita Members in the Oligocene could be divided into six third-order sequences. The new sequence framework has been established in the Sunda and Asri Basins. Sequence relationship between wells and seismic data has been implemented in the basin scale through the use of synthetical seismic records of 14 wells. Depositional systems, such as delta, fan-delta, nearshore subaqueous fan, and fluvial, are identified in the Banuwati Formation, Zelda and Gita Members. Alluvial fan, subaqueous fan, and fan delta occurred on the steep slopes of the basins. Deltas were mainly developed on the gentle slopes of the basins. There were three separated small basins with fluvial and shore-shallow lake deposition in the Banuwati Formation (SQ1). During the Lower Zelda (SQ2) sedimentation, the former separated small basins enlarged in a certain extent where delta and subaqueous fan were developed. Major lacustrine facies under deepwater environments and deltaic facies developed in the Upper-Lower Zelda and Middle-Upper Zelda (SQ3, SQ4). The sedimentary situation was almost the same as the Middle Zelda, but the water depth became shallower during Upper Zelda sedimentation. Later, fluvial and swamp developed in the upper part of the Upper Zelda and Gita Member (SQ5, SQ6). In general, basin sedimentary evolution is consistent with tectonic evolution. Finally, the favorable sandstone distribution in the Banuwati and Mid-Upper Zelda Member for further exploration was predicted according to the depositional systems, slope break, and present hydrocarbon occurrence. Three fields or eight favorable plays should be paid attention to for further exploration in the Sunda and Asri Basins, Indonesia.

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FRUTOS, P., G. HERVÁS, F. J. GIRÁLDEZ, M. FERNÁNDEZ, and A. R. MANTECÓN. "Digestive utilization of quebracho-treated soya bean meals in sheep." Journal of Agricultural Science 134, no. 1 (January 2000): 101–8. http://dx.doi.org/10.1017/s0021859699007261.

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A study on the use of quebracho tannins as chemical additives was carried out at the Spanish Council for Scientific Research, León, Spain during 1998 by conducting two experiments. In the first experiment, three ruminally cannulated ewes were used to determine in situ degradability of soya bean meals (SBM) treated with different doses of quebracho tannin. Samples were prepared by spraying 100 g SBM with 100 ml distilled water containing 0, 1, 5, 10, 15 or 25 g of commercial quebracho powder (S0, SQ1, SQ2, SQ3, SQ4 and SQ5, respectively). Intestinal digestibility of non-degradable protein was estimated in vitro. The rapidly degradable protein fraction of all quebracho treated soya bean meals was different (P<0·05) from the non-treated SBM (S0: 0·154), with values ranging from 0·032 to 0·133. SQ4 and SQ5 showed lower fractional rates of degradation of the protein than S0 (0·042 and 0·046 v. 0·082, respectively). By contrast, in vitro digestibility of the non-degradable protein was not significantly affected by the treatments imposed, with the exception of treatment with the highest dose of quebracho tannin in which intestinal digestion was reduced (0·939 v. 0·826 for S0 and SQ5, respectively. P<0·05). In the second experiment, ten ruminally cannulated ewes were used to examine the effect of a daily dosing of quebracho tannin into the rumen on the degradation of the quebracho-treated SBM. Long-term dosing of quebracho tannin did not increase the ability of the rumen microbes to degrade tannin treated SBM. It was therefore concluded that quebracho tannins could be used as chemical additives for improving the digestive utilization of protein-rich feeds in sheep.

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Li, Zhuo, Kun Zhang, Yan Song, Zhenxue Jiang, Xiaoxue Liu, Shu Jiang, Chengzao Jia, et al. "Division of shale sequences and prediction of the favorable shale gas intervals: an example of the Lower Cambrian of Yangtze Region in Xiuwu Basin." Open Geosciences 11, no. 1 (May 17, 2019): 183–95. http://dx.doi.org/10.1515/geo-2019-0015.

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Abstract It is a common method to use sequence stratigraphic theory to identify favourable intervals in hydrocarbon exploration. The Lower Cambrian shale of Well Jiangye-1 in Yangtze Region in Xiuwu Basin was chosen as the research object. The content of excess silicon of siliceous minerals in shale was calculated quantitatively, and the concentration distribution of Al, Fe, Mn showed that the excess silicon is of hydrothermally origin and the shale deposited in an environment with hydrothermal activity. Using U/Th values in the study, combined with lithology and logging data, in order to divide sequences of the Lower Cambrian shale in Yangtze Region in Xiuwu Basin. The result shows that the shale of the Lower Cambrian shale is recognized as 1 2nd sequence (TST-RST, TST = Transgressive systems tract; RST = Regressive systems tract) and then further subdivided into 5 3rd sequences (SQ1-SQ5). During the deposition of SQ2 and SQ3, hydrothermal activity was active, and their excess silicon content was generally above 20%-30%. Rising sea level and active hydrothermal activity were beneficial for the enrichment of siliceous minerals and organic matter. Based on the comparison of the reservoir parameters, it tells that SQ2 and SQ3 have relatively higher content of TOC, higher content of brittle minerals (such as siliceous minerals, carbonate minerals and so on), larger effective porosity and higher content of gas, which make it as the most favourable intervals of the Lower Cambrian in Xiuwu Basin.

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Li, Ang, Lai Xing Cai, Shuang Liu, and Qi Li. "Characteristics of Sedimentation Evolution Based on the Sequence Stratigraphic Frameworks in Shahezi Formation of Southern Xujiweizi Fault Depression." Advanced Materials Research 1010-1012 (August 2014): 1359–64. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1359.

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Many scholars in China introduced the theory of sequence stratigraphy,applying to Chinese continental fault depression lake, they have made a lot of achievements in scientific research. However, there are still a lot of controversy according to the establishment in Shahezi group of sequence stratigraphic framework in Xujiaweizi fault depression.Sequence boundary identification method in this paper is based on the “instruction of Vail’s sequence stratigraphy theory, identification of seismic unconformity, verification by using logging methords”. And, following the principle of isochronous ,sequence stratigraphic framework of this region is established clearly. The southern Xujiaweizi fault depression in Shahezi group is divided into 1 second grade sequence, in the interior distributed SQ1-SQ4 4 third grade sequences from the bottom. Developmental stages at the bottom of SQ1 and the top of SQ4, basin is small and water is shallow. However, Developmental stages in SQ2 and SQ3,water enters the lake basin continuously, formed a sedimentary background of “wide basin and deep water”. In addition, each of the three grade sequence has split structure, the lake transgressive domain and lake regression domain two system tracts. Besides, the reversed order para-sequence sets caused by the lake regression and progradation set on the positive para-sequence sets caused by the lake transgression and retrogradation. On the basis of sequence stratigraphic division and correlation, conbined with the regional construction and the supply of provenance ,the sedimentary sequence framework of evolution characteristics are studied.That fan delta,braided river delta, lacustrine are the main facies types in study area. Characteristics of sedimentary evolution there are like this: the characteristics of sedimentation evolution show framework controls sand, succession of evolution, separated-source sedimentary, contiguously distribution.

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Ashwell, Geoffrey J., Patricia C. Williamson, Andrew Green, Gurmit S. Bahra, and Christopher R. Brown. "Aggregation-Induced Linear and Non-Linear Optical Properties of Four Hydroxy-Substituted Analogues of 2,4-Bis[4-(dibutylamino)phenyl]squaraine." Australian Journal of Chemistry 51, no. 7 (1998): 599. http://dx.doi.org/10.1071/c98059.

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Langmuir films of the title compound, 2,4-bis[4-(dibutylamino)phenyl]squaraine, Sq0, and its substituted analogues, Sq1 (monohydroxy) to Sq4 (tetrahydroxy), exhibit three well defined phases at the air–water interface: λmax 525–550 nm (H-aggregate); 660–670 nm (intermediate); 760–770 nm (J-aggregate). The monolayer spectra are influenced by the surface pressure and the number of hydroxy substituents and, when the monolayers are transferred to a solid substrate, there is a correlation between the linear and non-linear optical behaviour of the Langmuir-Blodgett films. Second-harmonic generation has been observed even though the unit molecular structures of two analogues, Sq0 and Sq4, are centric. The behaviour is aggregation-induced and there is evidence that the dyes associate in dilute solution. The electrospray ionization mass spectra exhibit peaks with high mass/charge (m/z) ratios; the data conform to the dimeric aggregate and, for solutions of two or more squaraines, corroborate the existence of heteromolecular associates.

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Schuss, Patrick, Jürgen Konczalla, Johannes Platz, Hartmut Vatter, Volker Seifert, and Erdem Güresir. "Aneurysm-related subarachnoid hemorrhage and acute subdural hematoma: single-center series and systematic review." Journal of Neurosurgery 118, no. 5 (May 2013): 984–90. http://dx.doi.org/10.3171/2012.11.jns121435.

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Object Subarachnoid hemorrhage (SAH) with simultaneous acute subdural hematoma (SDH) is a severe disease. The authors' objective was to analyze the incidence, prognosis, and clinical outcome of patients suffering from aneurysm-related SAH and space-occupying acute SDH. Methods Between June 1999 and June 2011, data from 989 patients with aneurysm-related SAH were prospectively entered into a database. Eighteen patients (1.8%) presented with aneurysm-related SAH and space-occupying acute SDH. The treatment decision (clip or coil) was based on an interdisciplinary approach. Outcome was assessed according to the modified Rankin Scale (mRS) at 6 months and was dichotomized into favorable outcome (mRS Score 0–2) versus unfavorable outcome (mRS Score 3–6). PubMed was searched for published studies of aneurysm-related SAH and acute SDH to gain a larger population. A multivariate regression analysis was performed on the pooled data. Results Literature data, including the current series, revealed a total of 111 patients. Overall, 38 (34%) of 111 patients with aneurysm-related SAH and acute SDH achieved favorable outcome. Favorable outcome was achieved in 68% of patients with good-grade clinical presentation on admission (Hunt and Hess Grades I–III) versus 23% of the patients with poor-grade presentation (Hunt and Hess Grades IV and V, p < 0.0001). In the multivariate analysis, poor clinical condition at admission was the only predictor for unfavorable outcome (p = 0.02). Conclusions The present data confirm that patients with aneurysm-related SAH and acute SDH, even when presenting in poor clinical condition, might achieve favorable outcome. Therefore, treatment of patients with SAH and acute SDH should not be discontinued, but careful individual decision making is necessary for each patient.

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Lai, T.-H., J.-L. Fuh, J.-F. Lirng, P.-H. Tsai, and S.-J. Wang. "Subdural Haematoma in Patients With Spontaneous Intracranial Hypotension." Cephalalgia 27, no. 2 (February 2007): 133–38. http://dx.doi.org/10.1111/j.1468-2982.2006.01249.x.

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The incidence and clinical relevance of subdural haematoma (SDH) in patients with spontaneous intracranial hypotension (SIH) remain undetermined. We reviewed 40 consecutive SIH patients (18 female, 22 male) in a tertiary hospital. Eight (20%) of them had SDH and nine (23%), non-haemorrhagic subdural collections. The presence of SDH was associated with higher frequencies of male gender, recurrence of severe headache and neurological deficits. Outcomes were satisfactory after supportive care or epidural blood patches except for one SDH patient, who developed transtentorial herniation resulting in Duret haemorrhage and infarctions of bilateral posterior cerebral artery territories. In conclusion, subdural fluid collections were common in patients with SIH. SDH was associated with headache worsening or neurological deficits. Patients with SDH generally recovered well; however, serious sequela might occur.

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Perez-Vega, Carlos, Pilar Robles-Lomelin, Isabel Robles-Lomelin, Alexandra Diaz-Alba, and Victor Garcia Navarro. "Acute subdural hematoma recurrence during drain removal associated with spontaneous intracranial hypotension – A non-reported complication." Surgical Neurology International 11 (October 2, 2020): 316. http://dx.doi.org/10.25259/sni_385_2020.

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Background: Spontaneous intracranial hypotension (SIH) is an uncommon, benign, and generally self-limiting condition caused by low cerebrospinal fluid (CSF) volume and pressure usually caused by a CSF leak. Patients with SIH have an increased incidence of subdural hematomas (SDH), which may be bilateral and recurrent. Case Description: We report a unique case of a man presenting with SIH and bilateral SDH that were drained with bilateral craniotomies. During drain removal, the patient had an acute neurological deterioration and a CT scan showed SDH recurrence. The patient had two new recurrent SDH afterwards. After the third surgical intervention, the drain was removed in the OR with concomitant subdural saline infusion, there was no recurrence of SDH after that and the patient has had no further complications after a 2-year follow-up. Conclusion: Patients with intracranial hypotension are predisposed to form SDH. In this case, drain removal caused further decrease in intracranial pressure and triggered a new SDH formation, subdural saline irrigation masked atmospheric pressure and prevented this complication from happening again.

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Ade, Swetha, and Majaz Moonis. "Intracranial Hypotension with Multiple Complications: An Unusual Case Report." Case Reports in Neurological Medicine 2013 (2013): 1–3. http://dx.doi.org/10.1155/2013/913465.

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Background. Undiagnosed intracranial hypotension can result in several complications including subdural hematoma (SDH), subarachnoid hemorrhage (SAH), dural venous sinuses thrombosis (CVT), cranial nerve palsies, and stupor resulting from sagging of the brain. It is rare to see all the complications in one patient. Furthermore, imaging of the brain vasculature may reveal incidental asymptomatic small aneurysms. Given the combination of these imaging findings and a severe headache, the patients are often confused to have a primary subarachnoid hemorrhage.Case Report. We present a patient with spontaneous intracranial hypotension (SIH) who had an incidental ophthalmic artery aneurysm on MR imaging, and this presentation led to coiling of the aneurysm. The key aspect in the history “postural headaches” was missed, and this led to life threatening complications and unnecessary interventions. Revisiting the history and significant improvement in symptoms following an epidural blood patch resulted in the diagnosis of SIH.Conclusion. We strongly emphasize that appropriate history taking is the key in the diagnosis of SIH and providing timely treatment with an epidural blood patch could prevent potentially life threatening complications.

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Wang, Y.-F., J.-L. Fuh, J.-F. Lirng, F.-C. Chang, and S.-J. Wang. "Spontaneous Intracranial Hypotension with Isolated Cortical Vein Thrombosis and Subarachnoid Haemorrhage." Cephalalgia 27, no. 12 (December 2007): 1413–17. http://dx.doi.org/10.1111/j.1468-2982.2007.01437.x.

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Spontaneous intracranial hypotension (SIH) associated with subarachnoid haemorrhage (SAH) has never been reported. Here, we report on a case of a 33-year-old woman with SIH, who developed simple partial sensory seizures 3 weeks later. Neuroimaging studies, including brain computed tomography and angiography, were initially normal, but revealed an isolated cortical venous thrombosis at 3 weeks. One week later, brain magnetic resonance imaging showed SAH around the thrombosed cortical vein. We postulate that the decline in the venous blood flow velocity due to SIH may have resulted in cortical venous thrombosis, which in turn led to rupture of the vessel wall and SAH in this patient.

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Chen, Ying-Chu, Yen-Feng Wang, Jie-Yuan Li, Shih-Pin Chen, Jiing-Feng Lirng, Shu-Shya Hseu, Hsin Tung, Po-Lin Chen, Shuu-Jiun Wang, and Jong-Ling Fuh. "Treatment and prognosis of subdural hematoma in patients with spontaneous intracranial hypotension." Cephalalgia 36, no. 3 (May 5, 2015): 225–31. http://dx.doi.org/10.1177/0333102415585095.

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Objective The objective of this article is to elucidate the outcome, prognostic predictors and timing of surgical intervention for subdural hematoma (SDH) in patients with spontaneous intracranial hypotension (SIH). Methods Patients with SDH were identified retrospectively from 227 consecutive SIH patients. Data were collected on demographics, clinical courses, neuroimaging findings, and treatment of SDH, which was later divided into conservative treatment, epidural blood patches (EBP), and surgical intervention. Poor outcome was defined as severe neurological sequelae or death. Results Forty-five patients (20%) with SDH (mean maximal thickness 11.9 ± 6.2 mm) were recruited. All 15 patients with SDH <10 mm achieved good outcomes by either conservative treatment or EBP. Of 30 patients with SDH ≥10 mm, patients with uncal herniation ( n = 3) had poor outcomes, even after emergent surgical evacuation ( n = 2), compared to those without ( n = 27) (100% vs. 0%, p < 0.001). Fourteen patients underwent surgical evacuation, resulting in good outcomes in all 12 who received early intervention and poor outcomes in the remaining two who received delayed intervention after Glasgow Coma Scale (GCS) score ≤8 (100% vs. 0%, p = 0.01). Conclusions Uncal herniation results in poor outcomes in patients with SIH complicated with SDH. In individuals with SDH ≥10 mm and decreased GCS scores, early surgical evacuation might prevent uncal herniation.

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Ge, Jiawang, Xiaomin Zhu, Brian G. Jones, Yue Zhang, Handong Huang, and Yu Shu. "Facies delineation and sandstone prediction using seismic sedimentology and seismic inversion in the Eocene Huizhou Depression, Pearl River Mouth Basin, China." Interpretation 6, no. 2 (May 1, 2018): SD71—SD87. http://dx.doi.org/10.1190/int-2017-0155.1.

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Recently, the rift-related successions in the Eocene Huizhou (HZ) Depression have been considered crucial intervals for hydrocarbon exploration in the Pearl River Mouth Basin, China. However, the facies delineation and sandstone distribution are poorly understood due to the limited well data. Our study area is the HZ25 Block in the HZ Depression, which consists of a typical overlapped synthetic transfer zone connecting the HZ26 and XJ30 Sags. Integrated analysis of seismic and logging data indicates that the Eocene Wenchang Formation can be subdivided into four third-order sequences (SQ1–4). Well-based observations reveal that the braided deltaic system is mainly characterized by distributary channels, subaqueous distributary channels, mouth bars, and sheet-sand deposits. The sandstone isopach map acquired by seismic inversion indicates that the sandstone could be 340 m thick in the SQ2 but sharply decreases in the SQ3 in the transfer zone area. Stratal slices make it possible to delineate the facies maps by extrapolating the well observations to the entire 3D seismic survey; it is suggested that the SQ2 deltaic package largely comprises braided delta plain (distributary channels) and front deposits (subaqueous distributary channels and mouth bar) with a broad distribution of [Formula: see text], whereas the SQ3 deltaic package is dominated by delta-front deposits only [Formula: see text] in extent. This study suggests that small-scale fan-delta deposits are confined to the central part of the boundary fault, whereas the transfer zone captures large-scale braided delta sediments with a long transportation distance up to 8 km. The sandstones developed in the northwestern part of the transfer zone within the SQ2 sequence are expected to form potential hydrocarbon reservoirs for future oil exploration. Furthermore, this study may have implications for reservoir prediction and hydrocarbon exploration in other areas lacking well data, such as the HZ Depression.

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Tarsono, Andi L. Amar, Eko Poetri, and Mustaring. "PENGARUH PENYIRAMAN TERHADAP BEBERAPA ATRIBUT AGRONOMI RUMPUT Panicum sarmentosum Roxb. PADA UMUR DEFOLIASI EMPAT MINGGU." Pastura 10, no. 2 (April 19, 2021): 118. http://dx.doi.org/10.24843/pastura.2021.v10.i02.p11.

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Beberapa atribut agronomi rumput Panicum sarmentosum Roxb. sebagai respon perlakuan penyiramandievaluasi dalam suatu percobaan di rumah kaca Fakultas Pertanian, Universitas Tadulako, di Palu-SulawesiTengah. Penelitian ini bertujuan untuk mempelajari tingkat pertumbuhan kembali (regrowth) tanamanrumput Panicum sarmentosum Roxb. yang didefoliasi secara berulang dengan umur pemanenan 4 minggupada perlakuan penyiraman berbeda. Rancangan acak lengkap (RAL) digunakan dalam penelitian pot (pottrial) satu faktor ini. Perlakuan penyiraman yang diterapkan adalah penyiraman setiap hari sekali (S1H),penyiraman setiap dua hari sekali (S2H), dan penyiraman pada saat tanaman menjelang layu (S3H). Setiapperlakuan diulang sebanyak 6 kali sehingga diperoleh 18 pot unit percobaan. Hasil penelitian menunjukkanbahwa tanaman rumput Panicum sarmentosum Roxb. memiliki indikasi produktif yang baik sebagai spesies baru yang tahan terhadap kekeringan sehingga berpotensi untuk dapat dimanfaatkan dan dikembangkan pada lahan kering Lembah Palu. Kata kunci: hijauan, rumput, sarmentosum, penyiraman, pertumbuhan

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Martini, Ross P., Jonathan Ward, Dominic A. Siler, Jamie M. Eastman, Jonathan W. Nelson, Rohan N. Borkar, Nabil J. Alkayed, Aclan Dogan, and Justin S. Cetas. "Genetic variation in soluble epoxide hydrolase: association with outcome after aneurysmal subarachnoid hemorrhage." Journal of Neurosurgery 121, no. 6 (December 2014): 1359–66. http://dx.doi.org/10.3171/2014.7.jns131990.

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Object Patients with aneurysmal subarachnoid hemorrhage (SAH) are at high risk for delayed cerebral ischemia (DCI) and stroke. Epoxyeicosatrienoic acids (EETs) play an important role in cerebral blood flow regulation and neuroprotection after brain injury. Polymorphisms in the gene for the enzyme soluble epoxide hydrolase (sEH), which inactivates EETs, are associated with ischemic stroke risk and neuronal survival after ischemia. This prospective observational study of patients with SAH compares vital and neurologic outcomes based on functional polymorphisms of sEH. Methods Allelic discrimination based on quantitative real-time polymerase chain reaction was used to differentiate wild-type sEH from K55R heterozygotes (predictive of increased sEH activity and reduced EETs) and R287Q heterozygotes (predictive of decreased sEH activity and increased EETs). The primary outcome was new stroke after SAH. Secondary outcomes were death, Glasgow Outcome Scale score, and neurological deterioration attributable to DCI. Results Multivariable logistic regression models adjusted for age at admission and Glasgow Coma Scale scores revealed an increase in the odds of new stroke (OR 5.48 [95% CI 1.51–19.91]) and death (OR 7.52 [95% CI 1.27–44.46]) in the K55R group, but no change in the odds of new stroke (OR 0.56 [95% CI 0.16–1.96]) or death (OR 3.09 [95% CI 0.51–18.52]) in patients with R287Q genotype, compared with wild-type sEH. The R287Q genotype was associated with reduced odds of having a Glasgow Outcome Scale score of ≤ 3 (OR 0.23 [95% CI 0.06–0.82]). There were no significant differences in the odds of neurological deterioration due to DCI. Conclusions Genetic polymorphisms of sEH are associated with neurological and vital outcomes after aneurysmal SAH.

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Barker, Stacie. "Subdural and Primary Subarachnoid Hemorrhages: A Case Study." Neonatal Network 26, no. 3 (May 2007): 143–51. http://dx.doi.org/10.1891/0730-0832.26.3.143.

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Subdural hemorrhage (SDH) and primary subarachnoid hemorrhage (SAH) are two forms of intracranial bleeding that can be encountered in infants. These events can be life threatening to the infant and devastating to his family. Neonatal nurses need to have an understanding of these unfortunate, yet not uncommon, types of intracranial hemorrhage. This article explains the etiology, the diagnosis, and the treatment of SDH and SAH, concluding with a case study.

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Shiraishi, Keitaro, Takahiro Tomita, Takuya Akai, and Satoshi Kuroda. "Cauda equina schwannoma presenting with subarachnoid and subdural hemorrhage: Its underlying mechanism." Surgical Neurology International 12 (September 13, 2021): 462. http://dx.doi.org/10.25259/sni_659_2021.

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Background: A patient presented with a spinal subarachnoid hemorrhage (SAH) and subdural hematoma (SDH) attributed to a spinal schwannoma at the T12-L1 level. Case Description: A 67-year-old male acutely presented with severe back pain and L1 paraparesis/sensory loss, with urinary incontinence. CT/MR studies showed a spinal SAH and SDH within a likely T12-L1 schwannoma. At surgery, the hemorrhage within the tumor was continuous through the lower pole of the tumor into the subarachnoid and subdural spaces; tumor was dissected away from the surrounding tissues and totally removed. The postoperative course was uneventful, and the preoperative neurological deficits gradually resolved. Histopathologically, the lesion was a schwannoma with intratumoral hemorrhage. Conclusion: This case demonstrates the rare acute presentation of a T12-L1 schwannoma with an accompanying intratumoral hemorrhage resulting in both a SDH/SAH.

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Pettersson, Lars G. M., and Stephen R. Langhoff. "Theoretical electric dipole moments of SiH, GeH and SnH." Chemical Physics Letters 125, no. 5-6 (April 1986): 429–32. http://dx.doi.org/10.1016/0009-2614(86)87072-5.

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Anker-Møller, Thorkil, Anne Troldborg, Niels Sunde, and Anne-Mette Hvas. "Evidence for the Use of Tranexamic Acid in Subarachnoid and Subdural Hemorrhage: A Systematic Review." Seminars in Thrombosis and Hemostasis 43, no. 07 (September 6, 2017): 750–58. http://dx.doi.org/10.1055/s-0037-1604089.

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AbstractDespite neurosurgical treatment, a subarachnoid hemorrhage (SAH) can cause a debilitating stroke. The case fatality rate ranges from 27 to 44%, and many survivors are left permanently disabled; therefore, the need for improved treatment is obvious. Furthermore, subdural hemorrhages (SDHs) have a cumulative recurrence rate of 14% in the first year and are potentially fatal. The aim of this systematic review is to assess and discuss the evidence for the role of tranexamic acid (TXA) in treatment of SAH and SDH. Systematic literature searches were performed in MEDLINE, Embase, Scopus, and Web of Science (1946–2016). The inclusion criteria were TXA-treated group and control group; SAH or SDH verified by imaging, intraoperatively or at autopsy; human subjects; English; and an objective outcome. The search terms matched 443 records. Eight studies including nontraumatic SAH patients and one study including traumatic intracranial bleeding met the inclusion criteria. Comparing TXA-treated nontraumatic patients with controls, we found an overall odds ratio (OR) for rebleeding of 0.41 (95% confidence interval [CI]: 0.26–0.64), six studies reported the mortality rate with an overall OR of 0.88 (95% CI: 0.68–1.12), four studies reported no statistically significant difference on the Glasgow Outcome Scale, and one study showed a statistically significant increased risk of cerebral ischemia, whereas seven studies found no statistically significant difference. No studies including SDH patients met the inclusion criteria. TXA reduced the overall risk of rebleeding following nontraumatic SAH. A nonsignificant reduction in mortality was demonstrated in nontraumatic SAH without substantial indication of increased risk of ischemic lesions.

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Andaluz, Norberto, Thomas A. Tomsick, Jeffrey T. Keller, and Mario Zuccarello. "Subdural hemorrhage in the posterior fossa caused by a ruptured cavernous carotid artery aneurysm after a balloon occlusion test." Journal of Neurosurgery 105, no. 2 (August 2006): 315–19. http://dx.doi.org/10.3171/jns.2006.105.2.315.

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✓Given the relatively benign natural history of cavernous carotid artery aneurysms and based on anecdotal reports in the literature of subarachnoid hemorrhage (SAH) or subdural hemorrhage (SDH) from these aneurysms, observation is warranted and typically recommended. In this case report, the authors describe a woman who harbored a partially thrombosed, giant cavernous aneurysm that ruptured after she underwent a balloon occlusion test (BOT) and predominately led to an SDH. The authors believe that this occurrence is the first such report in the English literature. They discuss possible mechanisms for this event and the literature related to SAH or SDH from cavernous aneurysms, including why cavernous aneurysms cause such hemorrhages. The authors also recommend that attention be paid to such lesions regarding the possibility of aneurysmal rupture following a BOT.

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Zhu, Yu-Xiu, Chunxia Ge, Shijun Ma, Xiao-Ying Liu, Mengjie Liu, Yang Sun, and Guan-Feng Wang. "Maize ZmFNSI Homologs Interact with an NLR Protein to Modulate Hypersensitive Response." International Journal of Molecular Sciences 21, no. 7 (April 5, 2020): 2529. http://dx.doi.org/10.3390/ijms21072529.

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Nucleotide binding, leucine-rich-repeat (NLR) proteins are the major class of resistance (R) proteins used by plants to defend against pathogen infection. The recognition between NLRs and their cognate pathogen effectors usually triggers a rapid localized cell death, termed the hypersensitive response (HR). Flavone synthase I (FNSI) is one of the key enzymes in the flavone biosynthesis pathway. It also displays salicylic acid (SA) 5-hydroxylase (S5H) activity. A close homolog of FNSI/S5H displays SA 3-hydroxylase (S3H) activity. Both FNSI/S5H and S3H play important roles in plant innate immunity. However, the underlying molecular mechanisms and the relationship between S5H and S3H with the NLR-mediated HR are not known in any plant species. In this study, we identified three genes encoding ZmFNSI-1, ZmFNSI-2 and ZmS3H that are significantly upregulated in a maize line carrying an autoactive NLR Rp1-D21 mutant. Functional analysis showed that ZmFNSI-1 and ZmFNSI-2, but not ZmS3H, suppressed HR conferred by Rp1-D21 and its signaling domain CCD21 when transiently expressed in N. benthamiana. ZmFNSI-1 and ZmFNSI-2 physically interacted with CCD21. Furthermore, ZmFNSI-1 and ZmFNSI-2 interacted with HCT, a key enzyme in lignin biosynthesis pathway, which can also suppress Rp1-D21-mediated HR. These results lay the foundation for the further functional analysis of the roles of FNSI in plant innate immunity.

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Go, Taihei, Toshiyuki Tsutsui, Yasuaki Iida, Katsunori Fukutake, Ryoichi Fukano, Kosei Ishigaki, Kazuaki Tsuchiya, and Hiroshi Takahashi. "A Case of Spontaneous Spinal Subdural Hematoma Complicated by Cranial Subarachnoid Hemorrhage and Spinal Adhesive Arachnoiditis." Case Reports in Orthopedics 2019 (March 13, 2019): 1–4. http://dx.doi.org/10.1155/2019/7384701.

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A 76-year-old woman with a spinal subdural hematoma (SDH) was presented with severe back pain without headache. Magnetic resonance imaging (MRI) performed 4 days after onset showed SDH extending from Th2 to L3. She was diagnosed with spontaneous SDH without neurological manifestation, and conservative treatment was selected. Transient disturbance of orientation appeared 7 days after onset. Small subarachnoid hemorrhage (SAH) was detected on head CT, and strict antihypertensive therapy was started. Symptoms changed for the better. Back pain disappeared 4 weeks after onset. On follow-up MRI at 6 months after onset, the SDH had been resolved spontaneously. Although adhesive arachnoiditis was observed at Th4-6, the recurrence of clinical symptoms was not observed at one year and a half after onset. Spinal subdural space is almost avascular; a hematoma in a subdural space is considered to come from a subarachnoid space when it is a lot. A hemorrhage in subarachnoid space was flushed by cerebral spinal fluid; hematoma or arachnoiditis was not formed in general. In our case, hemorrhage was a lot and expansion of SDH was large enough to cause cranial SAH and arachnoiditis. But longitudinally expanded SDH did not show neurological manifestation and resolved spontaneously in our case.

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Furnell, Leo, Peter J. Holliman, Arthur Connell, Eurig W. Jones, Robert Hobbs, Christopher P. Kershaw, Rosie Anthony, Justin Searle, Trystan Watson, and James McGettrick. "Digital imaging to simultaneously study device lifetimes of multiple dye-sensitized solar cells." Sustainable Energy & Fuels 1, no. 2 (2017): 362–70. http://dx.doi.org/10.1039/c7se00015d.

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Singla, Navneet, Manjul Tripathi, and Rajesh Chhabra. "M5 segment aneurysm presenting as “pure acute SDH”." Journal of Neurosciences in Rural Practice 05, no. 04 (October 2014): 402–4. http://dx.doi.org/10.4103/0976-3147.140002.

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ABSTRACTSpontaneous "pure acute subdural hematoma (SDH)" is arguably a rare condition. We report on a pregnant female patient presenting as spontaneous acute SDH without subarachnoid hemorrhage (SAH) due to rupture of distal (M5 segment) middle cerebral artery aneurysm. We hereby discuss the diagnostic dilemma of this rare condition, along with the need for watchful evaluation of acute SDH without preceding head injury presenting in emergency outpatient departments, especially when it is first encountered by a trainee resident.

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Nayeem, Mohammed A., Isha Pradhan, S. Jamal Mustafa, Christophe Morisseau, John R. Falck, and Darryl C. Zeldin. "Adenosine A2A receptor modulates vascular response in soluble epoxide hydrolase-null mice through CYP-epoxygenases and PPARγ." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 304, no. 1 (January 1, 2013): R23—R32. http://dx.doi.org/10.1152/ajpregu.00213.2012.

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The interaction between adenosine and soluble epoxide hydrolase (sEH) in vascular response is not known. Therefore, we hypothesized that lack of sEH in mice enhances adenosine-induced relaxation through A2A adenosine receptors (AR) via CYP-epoxygenases and peroxisome proliferator-activated receptor γ (PPARγ). sEH−/− showed an increase in A2A AR, CYP2J, and PPARγ by 31%, 65%, and 36%, respectively, and a decrease in A1AR and PPARα (30% and 27%, respectively) vs. sEH+/+. 5′-N-ethylcarboxamidoadenosine (NECA, an adenosine receptor agonist), CGS 21680 (A2A AR-agonist), and GW 7647 (PPARα-agonist)-induced responses were tested with nitro-l-arginine methyl ester (l-NAME) (NO-inhibitor; 10−4 M), ZM-241385, SCH-58261 (A2A AR-antagonists; 10−6 M), 14,15-epoxyeicosa-5(Z)-enoic acid (14,15-EEZE, an epoxyeicosatrienoic acid-antagonist; 10−5 M), 12-(3-adamantan-1-yl-ureido) dodecanoic acid (AUDA; 10 μM) or trans-4-[4-(3-adamantan-1-yl-ureido)-cyclohexyloxy]-benzoic acid ( t-AUCB, sEH-inhibitors; 10−5 M), and T0070907 (PPARγ-antagonist; 10−7 M). In sEH−/− mice, ACh response was not different from sEH+/+ ( P > 0.05), and l-NAME blocked ACh-responses in both sEH−/− and sEH+/+ mice ( P < 0.05). NECA (10−6 M)-induced relaxation was higher in sEH−/− (+12.94 ± 3.2%) vs. sEH+/+ mice (−5.35 ± 5.2%); however, it was blocked by ZM-241385 (−22.42 ± 1.9%) and SCH-58261(−30.04 ± 4.2%). CGS-21680 (10−6 M)-induced relaxation was higher in sEH−/− (+37.4 ± 5.4%) vs. sEH+/+ (+2.14 ± 2.8%). l-NAME (sEH−/−, +30.28 ± 4.8%, P > 0.05) did not block CGS-21680-induced response, whereas 14,15-EEZE (−7.1 ± 3.7%, P < 0.05) did. Also, AUDA and t-AUCB did not change CGS-21680-induced response in sEH−/− ( P > 0.05), but reversed in sEH+/+ (from +2.14 ± 2.8% to +45.33 ± 4.1%, and +63.37 ± 7.2, respectively). PPARα-agonist did not relax as CGS 21680 (−2.48 ± 1.1 vs. +37.4 ± 5.4%) in sEH−/−, and PPARγ-antagonist blocked (from +37.4 ± 5.4% to +9.40 ± 3.1) CGS 21680-induced relaxation in sEH−/−. Our data suggest that adenosine-induced relaxation in sEH−/− may depend on the upregulation of A2A AR, CYP2J, and PPARγ, and the downregulation of A1 AR and PPARα.

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Rau, Cheng-Shyuan, Shao-Chun Wu, Shiun-Yuan Hsu, Hang-Tsung Liu, Chun-Ying Huang, Ting-Min Hsieh, Sheng-En Chou, Wei-Ti Su, Yueh-Wei Liu, and Ching-Hua Hsieh. "Concurrent Types of Intracranial Hemorrhage are Associated with a Higher Mortality Rate in Adult Patients with Traumatic Subarachnoid Hemorrhage: A Cross-Sectional Retrospective Study." International Journal of Environmental Research and Public Health 16, no. 23 (November 29, 2019): 4787. http://dx.doi.org/10.3390/ijerph16234787.

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Traumatic subarachnoid hemorrhage (SAH) is the second most frequent intracranial hemorrhage and a common radiologic finding in computed tomography. This study aimed to estimate the risk of mortality in adult trauma patients with traumatic SAH concurrent with other types of intracranial hemorrhage, such as subdural hematoma (SDH), epidural hematoma (EDH), and intracerebral hemorrhage (ICH), compared to the risk in patients with isolated traumatic SAH. We searched our hospital’s trauma database from 1 January, 2009 to 31 December, 2018 to identify hospitalized adult patients ≥20 years old who presented with a trauma abbreviated injury scale (AIS) of ≥3 in the head region. Polytrauma patients with an AIS of ≥3 in any other region of the body were excluded. A total of 1856 patients who had SAH were allocated into four exclusive groups: (Group I) isolated traumatic SAH, n = 788; (Group II) SAH and one diagnosis, n = 509; (Group III) SAH and two diagnoses, n = 493; and (Group IV) SAH and three diagnoses, n = 66. One, two, and three diagnoses indicated occurrences of one, two, or three other types of intracranial hemorrhage (SDH, EDH, or ICH). The adjusted odds ratio with a 95% confidence interval (CI) of the level of mortality was calculated with logistic regression, controlling for sex, age, and pre-existing comorbidities. Patients with isolated traumatic SAH had a lower rate of mortality (1.8%) compared to the other three groups (Group II: 7.9%, Group III: 12.4%, and Group IV: 27.3%, all p < 0.001). When controlling for sex, age, and pre-existing comorbidities, we found that Group II, Group III, and Group IV patients had a 4.0 (95% CI 2.4–6.5), 8.9 (95% CI 4.8–16.5), and 21.1 (95% CI 9.4–47.7) times higher adjusted odds ratio for mortality, respectively, than the patients with isolated traumatic SAH. In this study, we demonstrated that compared to patients with isolated traumatic SAH, traumatic SAH patients with concurrent types of intracranial hemorrhage have a higher adjusted odds ratio for mortality.

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Li, Jiong, Dao Xing Guo, and Chao Gong. "Performance Analysis of LDPC Coded SFH/BPSK in Partial-Band Interference." Applied Mechanics and Materials 443 (October 2013): 417–21. http://dx.doi.org/10.4028/www.scientific.net/amm.443.417.

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In this paper, we investigated the low density parity check (LDPC) coded performances of slow-frequency-hopped binary phase shift-keying (SFH/BPSK) systems in the presence partial-band interference (PBI). The contributions of this paper are two folds. First, we give the bits error probability (BER) of the SFH/BPSK system with PBI by analysis, and further verify it by numerical results. Second, we investigated the effects of code rate, code length, the number of symbols per hop (SPH) and interleaver on the performance of the SFH/BPSK system with PBI by numerical simulation.

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Lu, Haixin, Hanqiang Zhang, Yufei Li, and Feng Gan. "Sensitive and selective determination of tetracycline in milk based on sulfur quantum dot probes." RSC Advances 11, no. 37 (2021): 22960–68. http://dx.doi.org/10.1039/d1ra03745e.

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Lai, Grace Y., Paul J. Devlin, Kartik Kesavabhotla, Jonathan D. Rich, Duc T. Pham, Matthew B. Potts, and Babak S. Jahromi. "Management and outcome of intracranial hemorrhage in patients with left ventricular assist devices." Journal of Neurosurgery 132, no. 4 (April 2020): 1133–39. http://dx.doi.org/10.3171/2018.12.jns182467.

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OBJECTIVEAs the use of left ventricular assist devices (LVADs) has expanded, cerebrovascular complications have become an increasing source of morbidity and mortality in this population. Intracranial hemorrhage (ICH) in particular remains a devastating complication in patients who undergo LVAD placement with no defined management guidelines. The authors therefore reviewed surgical and anticoagulation management and outcomes of patients with LVADs who presented to their institution with ICH.METHODSThis retrospective cohort study assessed outcomes of patients who underwent LVAD placement at a single institution between 2007 and 2016 and in whom imaging demonstrated ICH.RESULTSDuring the study period, 281 patients had a HeartMate II or HeartWare LVAD placed. There were 37 episodes of ICH (recurrent in 3 cases). ICHs were categorized as intraparenchymal hemorrhage (IPH; n = 22, 59%), subdural hemorrhage (SDH; n = 6, 16%), and subarachnoid hemorrhage (SAH; n = 9, 24%). Neurosurgical intervention was deemed necessary in 27.3%, 66.7%, and 0% of patients with IPH, SDH, and SAH, respectively; overall survival > 30 days for each type of hemorrhage was 41%, 83%, and 89%, respectively. No patients had LVAD thrombus as a result of reversal of anticoagulation. Combined with prior reports, good outcomes are seen more often following surgery for SDH than for IPH (57% vs 7%, p = 0.004) in patients who underwent VAD placement.CONCLUSIONSPatients with IPH who undergo LVAD placement have poor outcomes regardless of anticoagulation reversal or neurosurgical intervention, whereas those with SDH may have good outcomes with medical and surgical intervention, and those with SAH appear to do well without anticoagulation reversal or surgery. When needed, anticoagulation reversal was not associated with an increase in LVAD thrombosis in this series.

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Cea Soriano, Lucía, David Gaist, Montse Soriano-Gabarró, Susan Bromley, and Luis A. García Rodríguez. "Low-dose aspirin and risk of intracranial bleeds." Neurology 89, no. 22 (November 1, 2017): 2280–87. http://dx.doi.org/10.1212/wnl.0000000000004694.

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Objective:To quantify the risk of intracranial bleeds (ICBs) associated with new use of prophylactic low-dose aspirin using a population-based primary care database in the United Kingdom.Methods:A cohort of new users of low-dose aspirin (75–300 mg; n = 199,079) aged 40–84 years and a 1:1 matched cohort of nonusers of low-dose aspirin at baseline were followed (maximum 14 years, median 5.4 years) to identify incident cases of ICB, with validation by manual review of patient records or linkage to hospitalization data. Using 10,000 frequency-matched controls, adjusted rate ratios (RRs) with 95% confidence intervals (CIs) were calculated for current low-dose aspirin use (0–7 days before the index date [ICB date for cases, random date for controls]); reference group was never used.Results:There were 1,611 cases of ICB (n = 743 for intracerebral hemorrhage [ICH], n = 483 for subdural hematoma [SDH], and n = 385 for subarachnoid hemorrhage [SAH]). RRs (95% CI) were 0.98 (0.84–1.13) for all ICB, 0.98 (0.80–1.20) for ICH, 1.23 (0.95–1.59) for SDH, and 0.77 (0.58–1.01) for SAH. No duration of use or dose–response association was apparent. RRs (95% CI) for ≥1 year of low-dose aspirin use were 0.90 (0.72–1.13) for ICH, 1.20 (0.91–1.57) for SDH, and 0.69 (0.50–0.94) for SAH.Conclusion:Low-dose aspirin is not associated with an increased risk of any type of ICB and is associated with a significantly decreased risk of SAH when used for ≥1 year.

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Chaudhary, N., P. Cooper, S. P. Lownie, W. Ng, and N. Duggal. "Spontaneous Intracranial Hypotension: Case Series of Rare Clinical Presentations." Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 38, no. 1 (January 2011): 54–58. http://dx.doi.org/10.1017/s0317167100011070.

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Abstract:Background:Spontaneous intracranial hypotension (SIH) is an increasingly described entity, with over 70 cases reported in the literature. The classic triad includes orthostatic headache, diffuse pachymeningeal enhancement on magnetic resonance imaging (MRI) with gadolinium, and low cerebrospinal fluid pressure (CSF) in the lateral decubitus (<60 mm H2O) and sitting positions.Method:We present four rare clinical presentations of SIH, two of which have not been previously described in the literature, to the best of our knowledge.Results:Patient 1 presented with dyspnea, dysphagia, bilateral ptosis, diplopia and seizures. Patient 2 presented with a paradoxical positional pattern of orthostatic hypotension. In Patient 3, bilateral subdural hematomas (SDH) were encountered; while in Patient 4, a recurrent unilateral SDH requiring multiple surgical interventions was demonstrated.Conclusion:Although uncommon clinical presentations, all four cases of intracranial hypotension were spontaneous, demonstrated diagnostic MRI findings, and responded favorably to blood patches or saline injections.

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Li, Jiong, Man Xi Wang, Dao Xing Guo, and Xiao Fei Pan. "Performance Analysis of LDPC Coded SFH/BPSK in LFM Jamming." Applied Mechanics and Materials 470 (December 2013): 748–52. http://dx.doi.org/10.4028/www.scientific.net/amm.470.748.

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In this paper, we investigated the low density parity check (LDPC) coded performances of slow-frequency-hopped binary phase shift-keying (SFH/BPSK) systems in the presence linear frequency modulated (LFM) jamming. We investigated the effects of code rate, code length, the number of symbols per hop (SPH) and interleaver on the performance of the SFH/BPSK system with LFM jamming by numerical simulation. And the results suggest that there is good performance through designing the system reasonably.

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Maksimenko, O., and O. Shenderovskaya. "SOLAR-DIURNAL GEOMAGNETIC FIELD VARIATIONS: SEASONAL AND LONG-TERM CHANGES OF SQY, SQZ AT THE OBSERVATORY AIA." Ukrainian Antarctic Journal, no. 16 (2018): 9–20. http://dx.doi.org/10.33275/1727-7485.16.2017.53.

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de Graaff, Deborah L. E., and Emery Schubert. "Pitch Error Coding the Sight Read, Practice, and Performance of an Elite Oboist." Music Perception 34, no. 2 (December 1, 2016): 132–51. http://dx.doi.org/10.1525/mp.2016.34.2.132.

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This paper presents a developing Pitch Error Coding Protocol for assessing the accuracy of a musician’s performance. The protocol organized performance errors into any of three main categories, each based on an established cognitive theory of music memory and processing: (1) the Serial Distance Hypothesis (SDH); (2) the Implication Realization (I-R) model; and (3) the mental organizing principle of the Schema Theory (SCH). An elite oboist formed the basis of a detailed case study where his sight reading, practice, and performance of a challenging excerpt of music were examined. These data were used to: 1) investigate the protocol; 2) ask whether any protocol components could explain errors better than others; 3) and show where improvements after practice occurred. The results revealed that the SDH accounted for the majority of pitch errors, these originated in a three-note proximity of the target and some SDH errors overlapped with the I-R category errors. Although final counts for SDH and I-R are similar, SDH uniquely identified errors more frequently than the I-R. Future research and development of the protocol might look at combinations of pieces and performer to determine whether SDH may be a dominant source of error.

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Bashir, Rani, Sakeer Vayalthrikkovil, Liza Espinoza, Leigh Irvine, James Scott, and Khorshid Mohammad. "Prevalence and Characteristics of Intracranial Hemorrhages in Neonates with Hypoxic Ischemic Encephalopathy." American Journal of Perinatology 35, no. 07 (December 8, 2017): 676–81. http://dx.doi.org/10.1055/s-0037-1608927.

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Introduction The risk factors of intracranial hemorrhages (ICH) in the context of neonatal hypoxic ischemic encephalopathy (HIE) and related interventions are unclear. Objective This article examines the prevalence and risk factors associated with ICH in neonates with HIE. Study Design This is a retrospective cohort study of neonates with HIE in Southern Alberta. ICH (subdural [SDH], subarachnoid [SAH], intraventricular [IVH], intraparenchymal [IPH]) were diagnosed by magnetic resonance imaging (MRI). Perinatal and neonatal characteristics were examined. Relation of hemorrhages with hypoxic changes on MRI and HIE stages were assessed. Results Number of HIE patients, n = 157; brain MRI was done in 138 infants; median gestation, 40 weeks; and cooled = 103 (66%). Prevalence of SDH, IPH, IVH, and SAH were 47, 22, 11, and 10 (34.1%, 15.9%, 7.8%, 7.2%), respectively. There was no significant increase in hemorrhage with mode of delivery, seizures, hypo/hypercarbia, severe thrombocytopenia, or deranged coagulation. All hemorrhages increased with higher HIE stage, regardless of the HIE severity in MRI. Adjusting for HIE staging, cooling, and gestation, IPH was observed more in infants who received inotropes (odds ratio [OR], 3.32; 95% confidence interval [CI], 1.20, 9.20). Conclusion SDH followed by IPH were the most common ICH. Thrombocytopenia and deranged coagulation did not increase risk of hemorrhages in HIE. Our study was not powered to determine the impact of inotrope use on the risk of IPH.

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Klok, Lisette, Yvonne Engels, Carel Veldhoven, and Danica Rotar Pavlič. "Early identification of patients in need of palliative care in slovenian general practice." Slovenian Journal of Public Health 57, no. 2 (April 12, 2018): 55–64. http://dx.doi.org/10.2478/sjph-2018-0008.

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Abstract Background To help general practitioners (GPs) in early identification of patients with palliative care (PC) needs, this pilot study aimed to determine the potential of the combined original surprise question (SQ1) (‘Would I be surprised if this patient died within the next 12 months?’) and the second surprise question (SQ2) (‘Would I be surprised if this patient was still alive after 12 months?’). We hypothesized that answering these SQs would trigger them to make a multidimensional care plan. Methods 26 Slovenian GPs, randomized into 4 groups, were invited to write a care plan for each of the four patients described in case vignettes (2 oncologic, 1 organ failure and 1 frailty case). GPs in group 1 were only asked to write a care plan for each patient. GPs in group 2 answered SQ1 and GPs in groups 3 and 4 answered SQ1 and SQ2 before writing the care plan. The type and number of PC aspects mentioned in the respective care plans were quantified into a numeric RADboud ANTicipatory (RADIANT) score. Results Mean RADIANT scores in groups 1-4 were 2.2, 3.6, 2.5 and 3.1, respectively. When comparing the different vignettes, vignette B (terminal oncologic patient) scored best (3.6). Mean RADIANT scores in groups 3 and 4 were slightly higher for GPs who would be surprised compared to GPs who would not be surprised if the patient was still alive in 12 months. Conclusion The combined SQs were considered helpful in the early identification of patients in need of PC in Slovenian general practice.

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Journal articles on the topic 'Sqh'

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