Periodicities in photospheric magnetic flux

Song, Wenbin; Wang, Jingxiu

doi:10.1007/s11433-006-0246-5

Cited by 17 publications

(22 citation statements)

References 42 publications

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“…We observed distinguishable differences among these materials. [19][20][21] The chemical and topographical properties of implants are increasingly recognized as important cues that inuence the response of vascular cells in vivo as well as in vitro in terms of cell adhesion, spreading, migration, differentiation and mechanotransduction signaling. We observed pseudopodial spreading on JDBM and WE43 substrates, as shown by the arrow points.…”

Section: Vascular Cytotoxicity and Biocompatibility Test In Vitromentioning

confidence: 99%

Nanophasic biodegradation enhances the durability and biocompatibility of magnesium alloys for the next-generation vascular stents

et al. 2013

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Biodegradable metal alloys emerge as a new class of biomaterials for tissue engineering and medical devices such as cardiovascular stents. Deploying biodegradable materials to fabricate stents not only obviates a second surgical intervention for implant removal but also circumvents the long-term foreign body effect of permanent implants. However, these materials for stents suffer from an un-controlled degradation rate, acute toxic responses, and rapid structural failure presumably due to a non-uniform, fast corrosion process. Here we report that highly uniform, nanophasic degradation is achieved in a new Mg alloy with unique interstitial alloying composition as the nominal formula Mg-2.5Nd-0.2Zn-0.4Zr (wt%, hereafter, denoted as JDBM). This material exhibits highly homogeneous nanophasic biodegradation patterns as compared to other biodegradable metal alloy materials. Consequently it has significantly reduced degradation rate determined by electrochemical characterization. The in vitro cytotoxicity test using human vascular endothelial cells indicates excellent biocompatibility and potentially minimal toxic effect on arterial vessel walls. Finally, we fabricated a cardiovascular stent using JDBM and performed in vivo long-term assessment via implantation of this stent in an animal model. The results confirmed the reduced degradation rate in vivo, excellent tissue compatibility and long-term structural and mechanical durability. Thus, this new Mg-alloy with highly uniform nanophasic biodegradation represents a major breakthrough in the field and a promising material for manufacturing the next generation biodegradable vascular stents.

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Section: Vascular Cytotoxicity and Biocompatibility Test In Vitromentioning

confidence: 99%

Nanophasic biodegradation enhances the durability and biocompatibility of magnesium alloys for the next-generation vascular stents

et al. 2013

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“…Han et al [15] and Song et al [16] respectively applied the Morlet wavelet to analyze the cyclical changes of SSN and photosphere magnetic flux. It is the product of the function of wave in a plane and the Gaussian function:…”

Section: Wavelet Analysis Methodsmentioning

confidence: 99%

Possible effect of solar activity on variation of the tree-rings of a 500 a platycladus orientalis at the Mausoleum of Emperor Huang

Feng

Han

2009

Sci. China Ser. G-Phys. Mech. Astron.

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The variation of the tree-ring's index of a platycladus orientalis at the Mausoleum of Emperor Huang and of a long series of sunspots relative number during AD1470-1974 are analyzed by using the wavelet power spectrum method, and their variation characters are also discussed. It is determined that the tree-ring's variation has cycles of approximate 2-7, 11, 93 and 150 a. Two data series are used for analyzing sunspot relative number (SSN) variation. First, the analysis of the annual average SSN during AD1700-1974 proved that variation cycles are about 11, 50, and 93 a; then, the data during AD1465-1975 obtained from the decadal average SSN train over 7000 a reconstructed on the geomagnetic data is analyzed and its variation cycles are about 50, 90, and 160 a. Besides the tree-rings cycle of 2-7 a is commonly considered to be related to ENSO, while 11 a cycle is related to solar Schwabe cycle; in addition, it is possible that the cycles of 90 and150 a are likely to be related to solar Gleissberg cycle and Suess cycle. The correlations between them are possibly due to the effect of solar activity on the climate and additionally on the tree's growth.tree-ring, solar activity, climate change, wavelet spectrum

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“…Figures 4b to 4d show the 11 year solar activity fluctuation variation. Han and Han (2002), Le (2004), Song and Wang (2006), and Zhan et al (2006) have measured the timevariable characteristics of solar activity cycles. The fluctuation range of the 11 year solar variation cycle is mainly from about 10 to 11 years.…”

Section: Wavelet Analysis Of Ismr and Solar Activitymentioning

confidence: 99%

The possible influence of solar activity on Indian summer monsoon rainfall

Han

Yin

2007

Appl. Geophys.

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The Indian summer monsoon rainfall (ISMR) plays an important role in the climate system of South Asia. Recently, studies about ISMR variations have been going into more depth. In this present paper, we mainly use the Scargle periodogram and wavelet transform methods to study the periodicity of ISMR changes between 1871 and 2004 and review the possible influence of solar activity on the rainfall. Analysis results show complicated ISMR variations have periodicities with remarkable time-variable characteristics. Investigating a possible connection between the rainfall and solar variations, we believe that solar activity affects the ISMR variations to some extent.

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Periodicities in photospheric magnetic flux

Cited by 17 publications

References 42 publications

Nanophasic biodegradation enhances the durability and biocompatibility of magnesium alloys for the next-generation vascular stents

Nanophasic biodegradation enhances the durability and biocompatibility of magnesium alloys for the next-generation vascular stents

Possible effect of solar activity on variation of the tree-rings of a 500 a platycladus orientalis at the Mausoleum of Emperor Huang

The possible influence of solar activity on Indian summer monsoon rainfall

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