Convergent Synthesis of the A—F Ring Segment of Yessotoxin and Adriatoxin.

ChemInform ◽  
2004 ◽  
Vol 35 (10) ◽  
Author(s):  
Isao Kadota ◽  
Hirokazu Ueno ◽  
Yoshinori Yamamoto
Keyword(s):  
Convergent Synthesis ◽  
Ring Segment ◽  
F Ring

Convergent synthesis of the A–F ring segment of yessotoxin and adriatoxin

2003 ◽  
Vol 44 (50) ◽  
pp. 8935-8938 ◽  
Author(s):  
Isao Kadota ◽  
Hirokazu Ueno ◽  
Yoshinori Yamamoto
Keyword(s):  
Convergent Synthesis ◽  
Ring Segment ◽  
F Ring

Convergent Synthesis of the WXYZA’B’C’D’E’F’ Ring Segment of Maitotoxin

2022 ◽  
Author(s):  
Keitaro Umeno ◽  
Hisaaki Onoue ◽  
Keiichi Konoki ◽  
Kohei Torikai ◽  
Yoko Yasuno ◽  
...  
Keyword(s):  
Convergent Synthesis ◽  
Ring Segment

Effects of shepherd conjunctions on Saturn's F ring

1984 ◽  
Vol 75 ◽  
pp. 423-429
Author(s):  
M.R. Showalter
Keyword(s):  
Ring Segment ◽  
F Ring

ABSTRACTSynnott (1982a) has reported that the F-ring braids are often found near the ring segment which was between the shepherds at their last conjunction. We study the possible perturbing effects of such conjunctions on the ring , and find that they are much too small to directly account for the braids.

Convergent synthesis of the F–K ring segment of brevetoxin B

2003 ◽  
Vol 44 (43) ◽  
pp. 7929-7932 ◽  
Author(s):  
Isao Kadota ◽  
Naoko Nishina ◽  
Hiroki Nishii ◽  
Shigetoshi Kikuchi ◽  
Yoshinori Yamamoto
Keyword(s):  
Convergent Synthesis ◽  
Ring Segment

Convergent Synthesis of the FGHI Ring Segment (I) of Yessotoxin.

ChemInform ◽  
2006 ◽  
Vol 37 (18) ◽  
Author(s):  
Isao Kadota ◽  
Hirokazu Ueno ◽  
Yuki Sato ◽  
Yoshinori Yamamoto
Keyword(s):  
Convergent Synthesis ◽  
Ring Segment

Indications of twist in the epsilon ring of Uranus

1984 ◽  
Vol 75 ◽  
pp. 193-195
Author(s):  
R. Vasundhara ◽  
J.C. Bhattacharyya
Keyword(s):  
Fine Structure ◽  
Optical Depth ◽  
Light Curves ◽  
Systematic Variation ◽  
Condensed Material ◽  
Ring Assembly ◽  
Ring Segment ◽  
Fine Structures ◽  
Twisted Bundle ◽  
F Ring

A comparison of light curves during occultation of stars by ε ring of Uranus indicate that this ring assembly possesses stable fine structures. The light curves observed during several events show almost similar fine structure across its width. Nicholson et al. (1982) quantitatively compared the separation of the five optical depth maxima, and concluded that no systematic variation of the normalised spacing, either with ring segment width or with data of observation was apparent. We have investigated the possibility of this having structure of a twisted bundle of narrow lanes of condensed material similar to that of Saturn’s F ring (Ref 4) and report the findings.

Convergent synthesis of the A–E ring segment of ciguatoxin CTX3C

Tetrahedron ◽  
2009 ◽  
Vol 65 (37) ◽  
pp. 7784-7789 ◽  
Author(s):  
Isao Kadota ◽  
Takashi Abe ◽  
Miyuki Uni ◽  
Hiroyoshi Takamura ◽  
Yoshinori Yamamoto
Keyword(s):  
Convergent Synthesis ◽  
Ring Segment

Convergent synthesis of the FGHI ring segment of yessotoxin

2006 ◽  
Vol 47 (1) ◽  
pp. 89-92 ◽  
Author(s):  
Isao Kadota ◽  
Hirokazu Ueno ◽  
Yuki Sato ◽  
Yoshinori Yamamoto
Keyword(s):  
Convergent Synthesis ◽  
Ring Segment

Saturn's E, G and F rings: modulated by the plasma sheet

1984 ◽  
Vol 75 ◽  
pp. 597
Author(s):  
E. Grün ◽  
G.E. Morfill ◽  
T.V. Johnson ◽  
G.H. Schwehm
Keyword(s):  
Solar Wind ◽  
Direct Contact ◽  
Transport Processes ◽  
Time Variable ◽  
Dust Particles ◽  
Spatial Diffusion ◽  
Drag Forces ◽  
Orbit Perturbation ◽  
Time Variations ◽  
F Ring

ABSTRACTSaturn's broad E ring, the narrow G ring and the structured and apparently time variable F ring(s), contain many micron and sub-micron sized particles, which make up the “visible” component. These rings (or ring systems) are in direct contact with magnetospheric plasma. Fluctuations in the plasma density and/or mean energy, due to magnetospheric and solar wind processes, may induce stochastic charge variations on the dust particles, which in turn lead to an orbit perturbation and spatial diffusion. It is suggested that the extent of the E ring and the braided, kinky structure of certain portions of the F rings as well as possible time variations are a result of plasma induced electromagnetic perturbations and drag forces. The G ring, in this scenario, requires some form of shepherding and should be akin to the F ring in structure. Sputtering of micron-sized dust particles in the E ring by magnetospheric ions yields lifetimes of 102to 104years. This effect as well as the plasma induced transport processes require an active source for the E ring, probably Enceladus.

A convergent synthesis of the spiroketal moiety of the HIV-1 protease inhibitors didemnaketals

Tetrahedron ◽  
2002 ◽  
Vol 58 (9) ◽  
pp. 1697-1708 ◽  
Author(s):  
Yan Xing Jia ◽  
Xin Li ◽  
Bin Wu ◽  
Xue Zhi Zhao ◽  
Yong Qiang Tu
Keyword(s):  
Protease Inhibitors ◽  
Convergent Synthesis ◽  
Hiv 1
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