Log in

Relevant bibliographies by topics / Light filaments / Journal articles

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

Journal articles on the topic 'Light filaments'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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 'Light filaments.'

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

Fard, Mohammad Ansari, Sina Taamoli, and Shant Baghram. "Cosmological filaments in the light of excursion set of saddle points." Monthly Notices of the Royal Astronomical Society 489, no. 1 (2019): 900–909. http://dx.doi.org/10.1093/mnras/stz2210.

Full text

Abstract:

ABSTRACT The universe in large scales is structured as a network known as cosmic web. Filaments are one of the structural components of this web, which can be introduced as a novel probe to study the formation and evolution of structures and as a probe to study the cosmological models and to address the missing baryon problem. The aim of this work is to introduce an analytical framework to study the statistics of filaments such as number density of them and also to obtain the length-mass relation. For this objective, we model filaments as collapsed objects which have an extension in one direct

APA, Harvard, Vancouver, ISO, and other styles

2

Gillott, Marcelle A., Dale Holen, Jonathan Ekman, Michelle Harry, and Martin Boraas. "Predation-induced E. coli filaments: Are they multicellular?" Proceedings, annual meeting, Electron Microscopy Society of America 51 (August 1, 1993): 420–21. http://dx.doi.org/10.1017/s0424820100147934.

Full text

Abstract:

Escherichia coli can have a filamentous growth form due to mutation or, in the current study, selection of predator-resistance when preyed on by a bactivorus protozoan. When used as food for the mixotrophic flagellate, Poterioochromonas malhamensis, filamentous E. coli appeared in continuous and batch cultures. The filamentous morphology of E. coli is persistent in plate and liquid culture in the absence of the flagellate. Typically, filament length is long in exponential growth and short in stationary phase.A major question in the morphology of these filamentous E. coli (Fig. 1) is whether th

APA, Harvard, Vancouver, ISO, and other styles

3

Guan, Chengyu, Jun Zou, Qingchang Chen, Mingming Shi, and Bobo Yang. "Effect of Different Bonding Materials on Flip-Chip LED Filament Properties." Applied Sciences 10, no. 1 (2019): 47. http://dx.doi.org/10.3390/app10010047.

Full text

Abstract:

This article researches the effect of Sn-based solder alloys on flip-chip light-emitting diode LED (FC-LED) filament properties. SEM images, shearing force, steady-state voltage, blue light luminous flux, and junction temperature were examined to demonstrate the difference between two types of FC-LED filaments welded with two solders. The microstructure surface of Sn90Sb10 filament solder joints was smoother and had fewer voids and cracks compared with that of SAC0307 filament solder joints, which indicates that the Sn90Sb10 filaments had a higher shearing force than the SAC0307 filaments; mor

APA, Harvard, Vancouver, ISO, and other styles

4

Hou, Y. J., T. Li, S. H. Zhong, et al. "Sunspot penumbral filaments intruding into a light bridge and the resultant reconnection jets." Astronomy & Astrophysics 642 (October 2020): A44. http://dx.doi.org/10.1051/0004-6361/202038668.

Full text

Abstract:

Context. Penumbral filaments and light bridges are prominent structures inside sunspots and are important for understanding the nature of sunspot magnetic fields and magneto-convection underneath. Aims. We investigate an interesting event where several penumbral filaments intrude into a sunspot light bridge. In doing so we aim to gain further insight into the magnetic fields of the sunspot penumbral filament and light bridge, as well as their interaction. Methods. Combining data from the New Vacuum Solar Telescope, Solar Dynamics Observatory, and Interface Region Imaging Spectrograph, we study

APA, Harvard, Vancouver, ISO, and other styles

5

Kim, Ga-Hyeon, Yeong Jun Lee, and Jong-Hee Kwon. "Relationship Between Harvesting Efficiency and Filament Morphology in Arthrospira platensis Gomont." Microorganisms 13, no. 2 (2025): 367. https://doi.org/10.3390/microorganisms13020367.

Full text

Abstract:

Arthrospira platensis, a filamentous cyanobacterium, exhibits morphological variability influenced by biotic and abiotic factors. We investigated the effect of sodium ion concentration on filament length, growth, and harvest efficiency. Increasing the sodium concentration from 0.2 M to 0.4 M (using NaHCO3 or Na2CO3) led to a significant increase in filament length, from 0.3393 to 0.7084 mm, and longer filaments had increased auto-flotation efficiency (from 87% to 94%) within 3 h. The linear filaments, obtained via spontaneous morphological conversion, also had increased photosynthetic activity

APA, Harvard, Vancouver, ISO, and other styles

6

Qi, D., R. W. Mitchell, T. Burdyga, L. E. Ford, K. H. Kuo, and C. Y. Seow. "Myosin light chain phosphorylation facilitates in vivo myosin filament reassembly after mechanical perturbation." American Journal of Physiology-Cell Physiology 282, no. 6 (2002): C1298—C1305. http://dx.doi.org/10.1152/ajpcell.00554.2001.

Full text

Abstract:

Phosphorylation of the 20-kDa regulatory myosin light chain (MLC) of smooth muscle is known to cause monomeric myosins in solution to self-assemble into thick filaments. The role of MLC phosphorylation in thick filament formation in intact muscle, however, is not clear. It is not known whether the phosphorylation is necessary to initiate thick filament assembly in vivo. Here we show, by using a potent inhibitor of MLC kinase (wortmannin), that the MLC phosphorylation and isometric force in trachealis muscle could be abolished without affecting calcium transients. By measuring cross-sectional d

APA, Harvard, Vancouver, ISO, and other styles

7

Tian, Mingwei, Zongqian Wang, Lijun Qu, et al. "Enhanced UV photo-stabilization of Nylon 6 filament with reduced graphene oxide/polyurethane nanocomposite Inks." International Journal of Clothing Science and Technology 30, no. 6 (2018): 817–27. http://dx.doi.org/10.1108/ijcst-07-2017-0107.

Full text

Abstract:

Purpose Nylon 6 filaments have weak light and heat resistance in terms of stability, which restrict its application in engineering field. The purpose of this paper is to prepare a new photo-stabilization functional nanocomposite inks by using graphene nanosheet as UV light-resisting functional materials incorporated with polyurethane. Design/methodology/approach Sunlight-resisting functional nylon filaments were produced by the continuous solution dip coating technology, through which the functional inks was coated on the surface of nylon 6 filament. The surface morphology of the coated filame

APA, Harvard, Vancouver, ISO, and other styles

8

Kampourakis, Thomas, Yin-Biao Sun, and Malcolm Irving. "Myosin light chain phosphorylation enhances contraction of heart muscle via structural changes in both thick and thin filaments." Proceedings of the National Academy of Sciences 113, no. 21 (2016): E3039—E3047. http://dx.doi.org/10.1073/pnas.1602776113.

Full text

Abstract:

Contraction of heart muscle is triggered by calcium binding to the actin-containing thin filaments but modulated by structural changes in the myosin-containing thick filaments. We used phosphorylation of the myosin regulatory light chain (cRLC) by the cardiac isoform of its specific kinase to elucidate mechanisms of thick filament-mediated contractile regulation in demembranated trabeculae from the rat right ventricle. cRLC phosphorylation enhanced active force and its calcium sensitivity and altered thick filament structure as reported by bifunctional rhodamine probes on the cRLC: the myosin

APA, Harvard, Vancouver, ISO, and other styles

9

Kasparian, Jérôme. "Filaments of Light." American Scientist 94, no. 2 (2006): 150. http://dx.doi.org/10.1511/2006.2.150.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Kasparian, Jerome. "Filaments of Light." American Scientist 94, no. 2 (2006): 150. http://dx.doi.org/10.1511/2006.58.150.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Kong, Defang, Jincheng Wang, and Genmei Pan. "Splitting and Eruption of an Active Region Filament Caused by Magnetic Reconnection." Astrophysical Journal 972, no. 1 (2024): 99. http://dx.doi.org/10.3847/1538-4357/ad66bb.

Full text

Abstract:

Abstract To gain a deeper understanding of the intricate process of filament eruption, we present a case study of a filament splitting and erupting by using multiwavelength data of the Solar Dynamics Observatory. It is found that the magnetic reconnection between the filament and the surrounding magnetic loops resulted in the formation of two new filaments, which erupted successively. The observational evidence of magnetic reconnection, such as the obvious brightening at the junction of two different magnetic structures, the appearance of a bidirectional jet, and subsequent filament splitting,

APA, Harvard, Vancouver, ISO, and other styles

12

Craig, R., R. Padrón, and J. Kendrick-Jones. "Structural changes accompanying phosphorylation of tarantula muscle myosin filaments." Journal of Cell Biology 105, no. 3 (1987): 1319–27. http://dx.doi.org/10.1083/jcb.105.3.1319.

Full text

Abstract:

Electron microscopy has been used to study the structural changes that occur in the myosin filaments of tarantula striated muscle when they are phosphorylated. Myosin filaments in muscle homogenates maintained in relaxing conditions (ATP, EGTA) are found to have nonphosphorylated regulatory light chains as shown by urea/glycerol gel electrophoresis and [32P]phosphate autoradiography. Negative staining reveals an ordered, helical arrangement of crossbridges in these filaments, in which the heads from axially neighboring myosin molecules appear to interact with each other. When the free Ca2+ con

APA, Harvard, Vancouver, ISO, and other styles

13

Tsukita, S., S. Tsukita, and G. Matsumoto. "Light-induced structural changes of cytoskeleton in squid photoreceptor microvilli detected by rapid-freeze method." Journal of Cell Biology 106, no. 4 (1988): 1151–60. http://dx.doi.org/10.1083/jcb.106.4.1151.

Full text

Abstract:

The cytoskeleton in squid photoreceptor microvilli was studied by freeze-substitution electron microscopy combined with rapid freezing using liquid helium, under dark-adapted and light-illuminated conditions. In the dark-adapted microvilli, actin filaments were regularly associated with granular structures on their surface; these granular structures were cross-linked to the rhodopsin-bearing plasma membranes through slender strands. Upon exposure to light, the granular components detached from the actin filaments, which then appeared to be fragmented and/or depolymerized. These observations ha

APA, Harvard, Vancouver, ISO, and other styles

14

Jiang, He, Jiming Sa, Cong Fan, et al. "Thermal Performance of LED Filament in Flip-Chip Packaging Manufactured for Different Correlated Color Temperature." Applied Sciences 11, no. 19 (2021): 8844. http://dx.doi.org/10.3390/app11198844.

Full text

Abstract:

The effect of correlated color temperature (CCT) on the thermal performance of light emitting diode (LED) filament in flip-chip packaging was investigated in detail. Two filaments with different lengths were selected as the research object, and the thermal resistance of filaments under three CCT (2200 K, 2400 K, 2700 K) were studied. The optical properties and thermal parameters of the two groups of filaments were measured, and the results were analyzed combined with the color coordinate. The experimental results show that thermal properties of LED filaments is closely related to CCT. Under co

APA, Harvard, Vancouver, ISO, and other styles

15

Oldenbourg, R., Edward D. Salmon, and Phong T. Tran. "The Birefringence of thin filaments measured with the Pol-Scope." Microscopy and Microanalysis 3, S2 (1997): 797–98. http://dx.doi.org/10.1017/s1431927600010874.

Full text

Abstract:

The living cell is criss-crossed by dense networks of filaments providing mechanic stability, site directed molecular transport and support of other vital cell functions. With the polarized light microscope we can observe the birefringence associated with thin filaments or partially oriented filament networks and measure the birefringence directly in the living cell (Fig. 1). Filament birefringence is a consequence of the elongated shape of the molecules and occurs naturally without the need to stain or label them, as is necessary in fluorescence imaging.We have measured the birefringence of m

APA, Harvard, Vancouver, ISO, and other styles

16

Wang 王, Peng 鹏., Xiao-xiao 潇潇 Tang 唐, Hao-da 昊达 Wang 汪, et al. "Cosmic Filament Spin. II. Filament Spin and Its Impact on Galaxy Spin–Filament Alignment in a Cosmological Simulation." Astrophysical Journal 983, no. 2 (2025): 100. https://doi.org/10.3847/1538-4357/adc0a2.

Full text

Abstract:

Abstract Observational studies have reported that cosmic filaments on the megaparsec scale exhibit rotational motion. Subsequent simulation studies have shown qualitative agreement with these findings, but quantitative discrepancies remain due to differences in data and methods, which require verification. To address this issue, we adopt the same methodology as used in the observations to identify filament spin from the galaxy distribution constructed from a hydrodynamic simulation. Using the same approach to measure filament spin, we find that the simulation results closely match the observat

APA, Harvard, Vancouver, ISO, and other styles

17

Xia, Qianli, Mark C. Neyrinck, Yan-Chuan Cai, and Miguel A. Aragón-Calvo. "Intergalactic filaments spin." Monthly Notices of the Royal Astronomical Society 506, no. 1 (2021): 1059–72. http://dx.doi.org/10.1093/mnras/stab1713.

Full text

Abstract:

ABSTRACT Matter in the Universe is arranged in a cosmic web, with a filament of matter typically connecting each neighbouring galaxy pair, separated by tens of millions of light-years. A quadrupolar pattern of the spin field around filaments is known to influence the spins of galaxies and haloes near them, but it remains unknown whether filaments themselves spin. Here, we measure dark matter velocities around filaments in cosmological simulations, finding that matter generally rotates around them, much faster than around a randomly located axis. It also exhibits some coherence along the filame

APA, Harvard, Vancouver, ISO, and other styles

18

Sobieszek, Apolinary. "Vectorial activation of smooth muscle myosin filaments and its modulation by telokin." Canadian Journal of Physiology and Pharmacology 83, no. 10 (2005): 899–912. http://dx.doi.org/10.1139/y05-053.

Full text

Abstract:

Smooth muscle myosin copurifies with myosin light chain kinase (MLCK) and calmodulin (CaM) as well as with variable amounts of myosin phosphatase. Therefore, myosin filaments formed in vitro also contain relatively high levels of these enzymes. Thus these filaments may be considered to be native-like because they are similar to those expected to exist in vivo. These endogenous enzymes are present at high concentrations relative to myosin, sufficient for rapid phosphorylation and dephosphorylation of the filaments at rates comparable to those observed for contraction and relaxation in intact mu

APA, Harvard, Vancouver, ISO, and other styles

19

Yang, Tianyi, Michael J. Hudson, and Niayesh Afshordi. "How dark are filaments in the cosmic web?" Monthly Notices of the Royal Astronomical Society 498, no. 3 (2020): 3158–70. http://dx.doi.org/10.1093/mnras/staa2547.

Full text

Abstract:

ABSTRACT The cold dark matter model predicts that dark matter haloes are connected by filaments. Direct measurements of the masses and structure of these filaments are difficult, but recently several studies have detected these dark-matter-dominated filaments using weak lensing. Here we study the efficiency of galaxy formation within the filaments by measuring their total mass-to-light ratios and stellar mass fractions. Specifically, we stack pairs of luminous red galaxies (LRGs) with a typical separation on the sky of 8 h−1 Mpc. We stack background galaxy shapes around pairs to obtain mass ma

APA, Harvard, Vancouver, ISO, and other styles

20

Chamberlain, Rebecca, Eirini Mangiorou, and Björn Fischer. "Introducing Fiber-Assisted Colorimetric Measurements as a Quality Control Tool of Hot Melt Extruded Filaments." Pharmaceutics 14, no. 5 (2022): 1055. http://dx.doi.org/10.3390/pharmaceutics14051055.

Full text

Abstract:

Pharmaceutical and medicinal printing technologies allow personalization and on-demand manufacturing of drug and medicinal products. Being able to manufacture patient tailored dosage forms or medical devices in a pharmacy, medical office, dental laboratory, or hospital at the point of care raises new demands on quality control procedures. For Fused Deposition Modeling, for example, it must be ensured that the starting materials, the (drug-loaded) filaments, are not accidentally exchanged by the operator. This study investigated the potential of colorimetric measurements for direct and indirect

APA, Harvard, Vancouver, ISO, and other styles

21

Liu, Xiong, Neil Billington, Shi Shu, et al. "Effect of ATP and regulatory light-chain phosphorylation on the polymerization of mammalian nonmuscle myosin II." Proceedings of the National Academy of Sciences 114, no. 32 (2017): E6516—E6525. http://dx.doi.org/10.1073/pnas.1702375114.

Full text

Abstract:

Addition of 1 mM ATP substantially reduces the light scattering of solutions of polymerized unphosphorylated nonmuscle myosin IIs (NM2s), and this is reversed by phosphorylation of the regulatory light chain (RLC). It has been proposed that these changes result from substantial depolymerization of unphosphorylated NM2 filaments to monomers upon addition of ATP, and filament repolymerization upon RLC-phosphorylation. We now show that the differences in myosin monomer concentration of RLC-unphosphorylated and -phosphorylated recombinant mammalian NM2A, NM2B, and NM2C polymerized in the presence

APA, Harvard, Vancouver, ISO, and other styles

22

Small, J. V., M. Herzog, and K. Anderson. "Actin filament organization in the fish keratocyte lamellipodium." Journal of Cell Biology 129, no. 5 (1995): 1275–86. http://dx.doi.org/10.1083/jcb.129.5.1275.

Full text

Abstract:

From recent studies of locomoting fish keratocytes it was proposed that the dynamic turnover of actin filaments takes place by a nucleation-release mechanism, which predicts the existence of short (less than 0.5 microns) filaments throughout the lamellipodium (Theriot, J. A., and T. J. Mitchison. 1991. Nature (Lond.). 352:126-131). We have tested this model by investigating the structure of whole mount keratocyte cytoskeletons in the electron microscope and phalloidin-labeled cells, after various fixations, in the light microscope. Micrographs of negatively stained keratocyte cytoskeletons pro

APA, Harvard, Vancouver, ISO, and other styles

23

Ikawa, Taiji, Masahito Shiozawa, Makoto Mouri, Mamiko Narita, and Osamu Watanabe. "A Sarcomere-Mimetic Gel: Gelation of Astral-Shaped Actin Filaments with Their Plus End Connected on Photopolymer Beads by Myosin Filaments." MRS Proceedings 1498 (2013): 213–18. http://dx.doi.org/10.1557/opl.2013.339.

Full text

Abstract:

ABSTRACTWe have developed a method of a stepwise construction of a gel consisting of (i) astral-shaped actin filaments with their plus end connected on photo-responsive polymer beads and (ii) bipolar myosin filaments as linkers in order to mimic sarcomeric structure, the basic unit of a muscle. In the method, firstly, 4 μm diam. beads were prepared from an acrylate polymer containing azobenzene moiety by a good-solvent evaporation technique. Next, gelsolin, which servers and remains bound to the plus end of an actin filament, was adsorbed and then immobilized on the bead surface by exposure to

APA, Harvard, Vancouver, ISO, and other styles

24

Ford, Lincoln E., Chun Y. Seow, and Victor R. Pratusevich. "Plasticity in smooth muscle, a hypothesis." Canadian Journal of Physiology and Pharmacology 72, no. 11 (1994): 1320–24. http://dx.doi.org/10.1139/y94-190.

Full text

Abstract:

The controversial finding that the thick filaments of smooth muscle can be evanescent leads to the hypothesis that the large functional range of this muscle is accommodated by plastic rearrangements that place more thick filaments in series at longer lengths. Our preliminary finding that the shortening velocity and compliance of dog tracheal muscle were strongly dependent on adapted muscle length, while force was much less length dependent, supports this hypothesis (V.R. Pratusevich, C.Y. Seow, and L.E. Ford. Biophys. J. 66: A139, 1994). The hypothesis leads to two further corollaries. The fir

APA, Harvard, Vancouver, ISO, and other styles

25

Zinke, Arno, and Andreas Weber. "Light Scattering from Filaments." IEEE Transactions on Visualization and Computer Graphics 13, no. 2 (2007): 342–56. http://dx.doi.org/10.1109/tvcg.2007.43.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Applegate, D., and JD Pardee. "Actin-facilitated assembly of smooth muscle myosin induces formation of actomyosin fibrils." Journal of Cell Biology 117, no. 6 (1992): 1223–30. http://dx.doi.org/10.1083/jcb.117.6.1223.

Full text

Abstract:

To identify regulatory mechanisms potentially involved in formation of actomyosin structures in smooth muscle cells, the influence of F-actin on smooth muscle myosin assembly was examined. In physiologically relevant buffers, AMPPNP binding to myosin caused transition to the soluble 10S myosin conformation due to trapping of nucleotide at the active sites. The resulting 10S myosin-AMPPNP complex was highly stable and thick filament assembly was suppressed. However, upon addition to F-actin, myosin readily assembled to form thick filaments. Furthermore, myosin assembly caused rearrangement of a

APA, Harvard, Vancouver, ISO, and other styles

27

Arora, Pamela D., Mary Anne Conti, Shoshana Ravid, et al. "Rap1 Activation in Collagen Phagocytosis Is Dependent on Nonmuscle Myosin II-A." Molecular Biology of the Cell 19, no. 12 (2008): 5032–46. http://dx.doi.org/10.1091/mbc.e08-04-0430.

Full text

Abstract:

Rap1 enhances integrin-mediated adhesion but the link between Rap1 activation and integrin function in collagen phagocytosis is not defined. Mass spectrometry of Rap1 immunoprecipitates showed that the association of Rap1 with nonmuscle myosin heavy-chain II-A (NMHC II-A) was enhanced by cell attachment to collagen beads. Rap1 colocalized with NM II-A at collagen bead-binding sites. There was a transient increase in myosin light-chain phosphorylation after collagen-bead binding that was dependent on myosin light-chain kinase but not Rho kinase. Inhibition of myosin light-chain phosphorylation,

APA, Harvard, Vancouver, ISO, and other styles

28

Lopez, Carlos G., Oliva Saldanha, Klaus Huber, and Sarah Köster. "Lateral association and elongation of vimentin intermediate filament proteins: A time-resolved light-scattering study." Proceedings of the National Academy of Sciences 113, no. 40 (2016): 11152–57. http://dx.doi.org/10.1073/pnas.1606372113.

Full text

Abstract:

Vimentin intermediate filaments (IFs) are part of a family of proteins that constitute one of the three filament systems in the cytoskeleton, a major contributor to cell mechanics. One property that distinguishes IFs from the other cytoskeletal filament types, actin filaments and microtubules, is their highly hierarchical assembly pathway, where a lateral association step is followed by elongation. Here we present an innovative technique to follow the elongation reaction in solution and in situ by time-resolved static and dynamic light scattering, thereby precisely capturing the relevant time

APA, Harvard, Vancouver, ISO, and other styles

29

Uetake, Yukari, and R. Larry Peterson. "Changes in actin filament arrays in protocorm cells of the orchid species, Spiranthes sinensis, induced by the symbiotic fungus Ceratobasidium cornigerum." Canadian Journal of Botany 75, no. 10 (1997): 1661–69. http://dx.doi.org/10.1139/b97-879.

Full text

Abstract:

Seeds of the terrestrial orchid, Spiranthes sinensis, were germinated in vitro in association with the symbiotic fungus, Ceratobasidium cornigerum. Resulting colonized protocorms were prepared for light microscopy, transmission electron microscopy, and fluorescence labelling of actin filaments for examination with laser scanning confocal microscopy. Fungal hyphae invaded the suspensor end of embryos, formed typical hyphal coils (pelotons) within parenchyma cells, and then underwent lysis resulting in degraded hyphal masses. Hyphae and hyphal masses were enveloped by host-derived membrane. Chan

APA, Harvard, Vancouver, ISO, and other styles

30

Levine, R. J., P. D. Chantler, R. W. Kensler, and J. L. Woodhead. "Effects of phosphorylation by myosin light chain kinase on the structure of Limulus thick filaments." Journal of Cell Biology 113, no. 3 (1991): 563–72. http://dx.doi.org/10.1083/jcb.113.3.563.

Full text

Abstract:

The results discussed in the preceding paper (Levine, R. J. C., J. L. Woodhead, and H. A. King. 1991. J. Cell Biol. 113:563-572.) indicate that A-band shortening in Limulus muscle is a thick filament response to activation that occurs largely by fragmentation of filament ends. To assess the effect of biochemical changes directly associated with activation on the length and structure of thick filaments from Limulus telson muscle, a dually regulated tissue (Lehman, W., J. Kendrick-Jones, and A. G. Szent Gyorgyi. 1973. Cold Spring Harbor Symp. Quant. Biol. 37:319-330.) we have examined the thick

APA, Harvard, Vancouver, ISO, and other styles

31

Ellien, A., F. Durret, C. Adami, N. Martinet, C. Lobo, and M. Jauzac. "The complex case of MACS J0717.5+3745 and its extended filament: intra-cluster light, galaxy luminosity function, and galaxy orientations." Astronomy & Astrophysics 628 (August 2019): A34. http://dx.doi.org/10.1051/0004-6361/201935673.

Full text

Abstract:

Context. The properties of galaxies are known to be affected by their environment, but although galaxies in clusters and groups have been quite thoroughly investigated, little is known about galaxies belonging to filaments of the cosmic web, or about the properties of the filaments themselves. Aims. Here we investigate the properties of the rich cluster MACS J0717.5+3745 and its extended filament by analyzing the distribution and fractions of intra-cluster light (ICL) in its core and by trying to detect intra-filament light (IFL) in the filament. We analyze the galaxy luminosity function (GLF)

APA, Harvard, Vancouver, ISO, and other styles

32

Zhang, Guo-Yin, Ph André, A. Men’shchikov, and Ke Wang. "Fragmentation of star-forming filaments in the X-shaped nebula of the California molecular cloud." Astronomy & Astrophysics 642 (October 2020): A76. http://dx.doi.org/10.1051/0004-6361/202037721.

Full text

Abstract:

Context. Dense molecular filaments are central to the star formation process, but the detailed manner in which they fragment into prestellar cores is not well understood yet. Aims. Here, we investigate the fragmentation properties and dynamical state of several star-forming filaments in the X-shaped nebula region of the California molecular cloud in an effort to shed some light on this issue. Methods. We used multiwavelength far-infrared images from Herschel as well as the getsources and getfilaments extraction methods to identify dense cores and filaments in the region and derive their basic

APA, Harvard, Vancouver, ISO, and other styles

33

Bergé, Luc, and Stefan Skupin. "Modeling ultrashort filaments of light." Discrete & Continuous Dynamical Systems - A 23, no. 4 (2009): 1099–139. http://dx.doi.org/10.3934/dcds.2009.23.1099.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Kolesik, Miroslav, and Jerome V. Moloney. "Self-healing femtosecond light filaments." Optics Letters 29, no. 6 (2004): 590. http://dx.doi.org/10.1364/ol.29.000590.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Dubietis, A., E. Kučinskas, G. Tamošauskas, E. Gaižauskas, M. A. Porras, and P. Di Trapani. "Self-reconstruction of light filaments." Optics Letters 29, no. 24 (2004): 2893. http://dx.doi.org/10.1364/ol.29.002893.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Furmaniak-Kazmierczak, Emilia, Michael E. Nesheim, and Graham P. Côté. "Coagulation factor Va is an actin filament binding and cross-linking protein." Biochemistry and Cell Biology 73, no. 1-2 (1995): 105–12. http://dx.doi.org/10.1139/o95-012.

Full text

Abstract:

Bovine coagulation cofactor factor Va is shown to bind to filaments of skeletal muscle actin with a dissociation constant of 40–50 nM in the presence of 50 mM NaCl. At saturation, approximately one molecule of factor Va was bound for every two actin molecules. The binding of factor Va to F-actin was inhibited by increasing ionic strength, being approximately 20-fold weaker at 150 mM NaCl. Addition of factor Va dramatically increased both the low-speed sedimentation and the low-shear viscosity of actin filament solutions, indicating that factor Va cross-links actin filaments. Factor Va also bou

APA, Harvard, Vancouver, ISO, and other styles

37

Liu, Xiong, Shi Shu, and Edward D. Korn. "Polymerization pathway of mammalian nonmuscle myosin 2s." Proceedings of the National Academy of Sciences 115, no. 30 (2018): E7101—E7108. http://dx.doi.org/10.1073/pnas.1808800115.

Full text

Abstract:

The three mammalian nonmuscle myosin 2 (NM2) monomers, like all class 2 myosin monomers, are hexamers of two identical heavy (long) chains and two pairs of light (short) chains bound to the heavy chains. The heavy chains have an N-terminal globular motor domain (head) with actin-activated ATPase activity, a lever arm (neck) to which the two light chains bind, and a coiled-coil helical tail. Monomers polymerize into bipolar filaments, with globular heads at each end separated by a bare zone, by antiparallel association of their coiled-coil tails. NM2 filaments are highly dynamic in situ, freque

APA, Harvard, Vancouver, ISO, and other styles

38

Sturmer, K., O. Baumann, and B. Walz. "Actin-dependent light-induced translocation of mitochondria and ER cisternae in the photoreceptor cells of the locust Schistocerca gregaria." Journal of Cell Science 108, no. 6 (1995): 2273–83. http://dx.doi.org/10.1242/jcs.108.6.2273.

Full text

Abstract:

Light-dependent changes in the positioning of organelles in photoreceptor cells of arthropods are a well-known phenomenon. In this study, we examine the role of the cytoskeleton in these light-dependent antagonistic movements. In dark-adapted photoreceptor cells of the locust Schistocerca gregaria, prominent sacs of smooth endoplasmic reticulum (ER) oppose the bases of the photoreceptive microvilli. Light stimulation causes a translocation of the ER elements towards the main cell body, and an aggregation of mitochondria adjacent to the microvilli. Immunofluorescence studies and electron-micros

APA, Harvard, Vancouver, ISO, and other styles

39

Dinsmore, Jack T., and Roger W. Romani. "A Catalog of Pulsar X-Ray Filaments." Astrophysical Journal 976, no. 1 (2024): 4. http://dx.doi.org/10.3847/1538-4357/ad8344.

Full text

Abstract:

Abstract We present the first Chandra X-ray Observatory (CXO) catalog of “pulsar X-ray filaments,” or “misaligned outflows.” These are linear, synchrotron-radiating features powered by ultrarelativistic electrons and positrons that escape from bow shock pulsars. The filaments are misaligned with the (large) pulsar velocity, distinguishing them from the pulsar wind nebula (PWN) trail, which is also often visible in CXO ACIS images. Spectral fits and morphological properties are extracted for five secure filaments and three candidates using a uniform method. We present a search of archival CXO d

APA, Harvard, Vancouver, ISO, and other styles

40

Seow, Chun Y. "Myosin filament assembly in an ever-changing myofilament lattice of smooth muscle." American Journal of Physiology-Cell Physiology 289, no. 6 (2005): C1363—C1368. http://dx.doi.org/10.1152/ajpcell.00329.2005.

Full text

Abstract:

A major development in smooth muscle research in recent years is the recognition that the myofilament lattice of the muscle is malleable. The malleability appears to stem from plastic rearrangement of contractile and cytoskeletal filaments in response to stress and strain exerted on the muscle cell, and it allows the muscle to adapt to a wide range of cell lengths and maintain optimal contractility. Although much is still poorly understood, we have begun to comprehend some of the basic mechanisms underlying the assembly and disassembly of contractile and cytoskeletal filaments in smooth muscle

APA, Harvard, Vancouver, ISO, and other styles

41

Maciver, S. K., D. H. Wachsstock, W. H. Schwarz, and T. D. Pollard. "The actin filament severing protein actophorin promotes the formation of rigid bundles of actin filaments crosslinked with alpha-actinin." Journal of Cell Biology 115, no. 6 (1991): 1621–28. http://dx.doi.org/10.1083/jcb.115.6.1621.

Full text

Abstract:

The actin filament severing protein, Acanthamoeba actophorin, decreases the viscosity of actin filaments, but increases the stiffness and viscosity of mixtures of actin filaments and the crosslinking protein alpha-actinin. The explanation of this paradox is that in the presence of both the severing protein and crosslinker the actin filaments aggregate into an interlocking meshwork of bundles large enough to be visualized by light microscopy. The size of these bundles depends on the size of the containing vessel. The actin filaments in these bundles are tightly packed in some areas while in oth

APA, Harvard, Vancouver, ISO, and other styles

42

Pötzi, Werner, Gernot Riegler, Astrid Veronig, Thomas Pock, and Ute Möstl. "A system for near real-time detection of filament eruptions at Kanzelhöhe Observatory." Proceedings of the International Astronomical Union 8, S300 (2013): 519–20. http://dx.doi.org/10.1017/s1743921313011800.

Full text

Abstract:

AbstractKanzelhöhe Observatory (kso.ac.at) performs regular high-cadence full-disk observations of the solar chromosphere in the Hα and CaIIK spectral lines as well as the solar photosphere in white-light. In the frame of ESA's Space Situational Awareness (SSA) activities, a new system for near real-time Hα image provision through the SSA Space Weather (SWE) portal (swe.ssa.esa.int) and for automatic alerting of flares and erupting filaments is under development. Image segmentation algorithms, based on optical flow image registration, for the automatic detection of solar filaments in real time

APA, Harvard, Vancouver, ISO, and other styles

43

Trybus, K. M., and S. Lowey. "Assembly of smooth muscle myosin minifilaments: effects of phosphorylation and nucleotide binding." Journal of Cell Biology 105, no. 6 (1987): 3007–19. http://dx.doi.org/10.1083/jcb.105.6.3007.

Full text

Abstract:

Small bipolar filaments, or "minifilaments," are formed when smooth muscle myosin is dialyzed against low ionic strength pyrophosphate or citrate/Tris buffers. Unlike synthetic filaments formed at approximately physiological ionic conditions, minifilaments are homogeneous as indicated by their hypersharp boundary during sedimentation velocity. Electron microscopy and hydrodynamic techniques were used to show that 20-22S smooth muscle myosin minifilaments are 380 nm long and composed of 12-14 molecules. By varying solvents, a continuum of different size polymers in the range of 15-30S could be

APA, Harvard, Vancouver, ISO, and other styles

44

Fry, K. M., and S. B. McIver. "Development of the lateral palatal brush in larvae of Aedes aegypti (L.) (Diptera: Culicidae)." Canadian Journal of Zoology 68, no. 7 (1990): 1454–67. http://dx.doi.org/10.1139/z90-216.

Full text

Abstract:

Light and electron microscopy were used to observe development of the lateral palatal brush in Aedes aegypti (L.) larvae. Development was sampled at 4-h intervals from second- to third-instar ecdyses. Immediately after second-instar ecdysis, the epidermis apolyses from newly deposited cuticle in the lateral palatal pennicular area to form an extensive extracellular cavity into which the fourth-instar lateral palatal brush filaments grow as cytoplasmic extensions. On reaching their final length, the filaments deposit cuticulin, inner epicuticle, and procuticle sequentially on their outer surfac

APA, Harvard, Vancouver, ISO, and other styles

45

Kang, Bok Choon, K. H. Min, Y. H. Lee, Beong Bok Hwang, and Chathura Nalendra Herath. "Microscopic Evaluation of Commingling-Hybrid Yarns." Materials Science Forum 539-543 (March 2007): 992–96. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.992.

Full text

Abstract:

Fibers made of elements such as carbon, aramid and glass have higher mechanical properties than other conventional textile fibers and they enable the production of light weight composites as end products. Furthermore, commingling hybrid yarns generally have a characteristic feature so that their components are distributed homogeneously enough over the yarn cross section. A normal air texturerising machine was modified to produce commingling hybrid yarns for test samples. Different process parameters were applied to produce the hybridized yarn samples. However, these process parameters turned o

APA, Harvard, Vancouver, ISO, and other styles

46

Trybus, K. M. "Filamentous smooth muscle myosin is regulated by phosphorylation." Journal of Cell Biology 109, no. 6 (1989): 2887–94. http://dx.doi.org/10.1083/jcb.109.6.2887.

Full text

Abstract:

The enzymatic activity of filamentous dephosphorylated smooth muscle myosin has been difficult to determine because the polymer disassembles to the folded conformation in the presence of MgATP. Monoclonal antirod antibodies were used here to "fix" dephosphorylated myosin in the filamentous state. The steady-state actin-activated ATPase of phosphorylated filaments was 30-100-fold higher than that of antibody-stabilized dephosphorylated filaments, suggesting that phosphorylation can activate ATPase activity independent of changes in assembly. The degree of regulation may exceed 100-fold, because

APA, Harvard, Vancouver, ISO, and other styles

47

Wang, Lu, Isabel J. Sobieszek, Chun Y. Seow, and Apolinary Sobieszek. "Purification of Myosin from Bovine Tracheal Smooth Muscle, Filament Formation and Endogenous Association of Its Regulatory Complex." Cells 12, no. 3 (2023): 514. http://dx.doi.org/10.3390/cells12030514.

Full text

Abstract:

Dynamic regulation of myosin filaments is a crucial factor in the ability of airway smooth muscle (ASM) to adapt to a wide length range. Increased stability or robustness of myosin filaments may play a role in the pathophysiology of asthmatic airways. Biochemical techniques for the purification of myosin and associated regulatory proteins could help elucidate potential alterations in myosin filament properties of asthmatic ASM. An effective myosin purification approach was originally developed for chicken gizzard smooth muscle myosin. More recently, we successfully adapted the procedure to bov

APA, Harvard, Vancouver, ISO, and other styles

48

Dwyer, Mike E., Rae M. Robertson-Anderson, and Bekele J. Gurmessa. "Nonlinear Microscale Mechanics of Actin Networks Governed by Coupling of Filament Crosslinking and Stabilization." Polymers 14, no. 22 (2022): 4980. http://dx.doi.org/10.3390/polym14224980.

Full text

Abstract:

Actin plays a vital role in maintaining the stability and rigidity of biological cells while allowing for cell motility and shape change. The semiflexible nature of actin filaments—along with the myriad actin-binding proteins (ABPs) that serve to crosslink, bundle, and stabilize filaments—are central to this multifunctionality. The effect of ABPs on the structural and mechanical properties of actin networks has been the topic of fervent investigation over the past few decades. Yet, the combined impact of filament stabilization, stiffening and crosslinking via ABPs on the mechanical response of

APA, Harvard, Vancouver, ISO, and other styles

49

Haynes, Jennifer, Jyoti Srivastava, Nikki Madson, Torsten Wittmann, and Diane L. Barber. "Dynamic actin remodeling during epithelial–mesenchymal transition depends on increased moesin expression." Molecular Biology of the Cell 22, no. 24 (2011): 4750–64. http://dx.doi.org/10.1091/mbc.e11-02-0119.

Full text

Abstract:

Remodeling of actin filaments is necessary for epithelial–mesenchymal transition (EMT); however, understanding of how this is regulated in real time is limited. We used an actin filament reporter and high-resolution live-cell imaging to analyze the regulated dynamics of actin filaments during transforming growth factor-β–induced EMT of mammary epithelial cells. Progressive changes in cell morphology were accompanied by reorganization of actin filaments from thin cortical bundles in epithelial cells to thick, parallel, contractile bundles that disassembled more slowly but remained dynamic in tr

APA, Harvard, Vancouver, ISO, and other styles

50

Natyaganova, A. V., E. V. Mincheva, and Yu S. Bukin. "Cytomorphology of the wound healing process in the green filamentous algae, Ulothrix zonata (F. Weber & Mohr) K tzing 1833." Limnology and Freshwater Biology, no. 2 (2022): 1229–43. http://dx.doi.org/10.31951/2658-3518-2022-a-2-1229.

Full text

Abstract:

Abstract. For the first time, we present a cytomorphological description of the self-healing (repair) process of damaged thalli sites, wound healing , in the green filamentous algae, Ulothrix zonata (F. Weber & Mohr) K tzing 1833. In the filaments of this species from Lake Baikal and the Angara (Baikal outflow), Zhilishche (Baikal inflow) and Ida (Angara inflow) rivers, light microscopy methods revealed dome-like and conical protrusions and elongations of transverse cell walls directed into adjacent dead (without protoplast) and defective (with deformed chloroplasts) cells. At the same tim

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!