An analysis of the visible absorption spectrum of chlorophyll a monomer, dimer, and oligomers in solution

1976 ◽  
Vol 98 (25) ◽  
pp. 8222-8230 ◽  
Author(s):  
Lester L. Shipman ◽  
Therese M. Cotton ◽  
James R. Norris ◽  
Joseph J. Katz
Keyword(s):  
Absorption Spectrum ◽  
Chlorophyll A ◽  
Visible Absorption Spectrum ◽  
Visible Absorption

A PROPOSED STRUCTURE FOR CHLOROPHYLL d

1959 ◽  
Vol 37 (3) ◽  
pp. 507-514 ◽  
Author(s):  
A. S. Holt ◽  
H. V. Morley
Keyword(s):  
Absorption Spectrum ◽  
Chlorophyll A ◽  
Potassium Permanganate ◽  
Oxidation Product ◽  
Visible Absorption Spectrum ◽  
Visible Absorption ◽  
Chlorophyll D ◽  
Vinyl Group

Treatment of chlorophyll a or methyl chlorophyllide a with potassium permanganate effected oxidation of the 2-vinyl group without concomitant oxidation of the cyclopentanone ring. One of the products obtained was of especial interest because its visible absorption spectrum was identical with that of a previously known, but chemically uncharacterized, pigment—chlorophyll d. The preparation and identification of this oxidation product as 2-desvinyl-2-formyl-chlorophyll-a is given and its probable identity with chlorophyll d is discussed in detail.

scholarly journals Direct observation of o-benzyne formation in photochemical hexadehydro-Diels–Alder (hν-HDDA) reactions

2020 ◽  
Vol 11 (34) ◽  
pp. 9198-9208 ◽  
Author(s):  
Xiaonan Ma ◽  
Jan Maier ◽  
Michael Wenzel ◽  
Alexandra Friedrich ◽  
Andreas Steffen ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Direct Observation ◽  
Diels Alder ◽  
Visible Absorption Spectrum ◽  
Visible Absorption ◽  
First Time

We report the transient ultraviolet/visible absorption spectrum of an o-benzyne species in solution for the first time.

Authentication and Analysis of Olive Oil Based on Stimulated Brillouin Scattering and UV-Visible Absorption Spectrum

2018 ◽  
Vol 45 (9) ◽  
pp. 0911016
Author(s):  
曹晨鹏 Cao Chenpeng ◽  
郝仕国 Hao Shiguo ◽  
罗宁宁 Luo Ningning ◽  
史久林 Shi Jiulin ◽  
何兴道 He Xingdao
Keyword(s):  
Absorption Spectrum ◽  
Olive Oil ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Visible Absorption Spectrum ◽  
Visible Absorption ◽  
Uv Visible ◽  
Stimulated Brillouin

scholarly journals The visible absorption spectrum of water.

1980 ◽  
Vol 56 (7) ◽  
pp. 403-407 ◽  
Author(s):  
Hiroshi TSUBOMURA ◽  
Naoto YAMAMOTO ◽  
Nobutaka MATSUO ◽  
Yoshio OKADA
Keyword(s):  
Absorption Spectrum ◽  
Visible Absorption Spectrum ◽  
Visible Absorption

scholarly journals Interaction of cytochrome b5 with surfactant vesicles

1988 ◽  
Vol 251 (2) ◽  
pp. 391-396
Author(s):  
D M Davies ◽  
J M Lawther
Keyword(s):  
Absorption Spectrum ◽  
Phosphatidic Acid ◽  
Cytochrome B5 ◽  
Visible Absorption Spectrum ◽  
Visible Absorption ◽  
Surfactant Vesicles ◽  
Dimyristoyl Phosphatidylcholine ◽  
Dicetyl Phosphate ◽  
Kinetics Of

Changes in the u.v.-visible absorption spectrum of cytochrome b5 which occur upon addition of dicetyl phosphate, dimyristoyl phosphatidic acid (DMPA), or mixed DMPA/dimyristoyl phosphatidylcholine vesicles are consistent with haem transfer from the cytochrome to the membrane via an intermediate haemoprotein species. The effects of vesicle charge and concentration on the kinetics of haem transfer are discussed.

scholarly journals Effect of Cu, Cr, S Doped TiO2 for Transparent Plastic Bar Reinforced Concrete

2020 ◽  
Vol 10 (20) ◽  
pp. 7334
Author(s):  
Seung-Hoon Seo ◽  
Byoung-Il Kim
Keyword(s):  
Absorption Spectrum ◽  
Reinforced Concrete ◽  
Visible Light ◽  
High Performance Concrete ◽  
Test Method ◽  
Visible Absorption Spectrum ◽  
Nox Removal ◽  
Transparent Plastic ◽  
Visible Absorption ◽  
Uv Visible

In this study, after firing and powdering Cu, Cr, and S with NP-400 TiO2, an NOx removal rate test was performed according to the ISO test method to analyze the photocatalytic reactivity in visible light. The distribution of the photocatalyst and visible light reactivity on the surface of the test specimen were confirmed through SEM (Scanning electron microscope), EDS (Energy dispersive spectroscopy), XRD (X-ray diffraction), UV-visible absorption spectrum and energy band gap tests. The flowability of UHPC (Ultra high performance concrete) slightly decreased due to the increase in the photocatalyst mixing rate, but both J-Ring and L-Box test results showed that there is no problem when concrete is placed. As a result of SEM and EDS tests, good microstructure and peak values were confirmed in the test specimens doped with Cu, and as a result of the XRD test, anatase and rutile peaks were confirmed in the Cu, Cr, and S specimens. In the UV-visible absorption spectrum analysis, it was confirmed that only the specimen doped with Cu maintains a high absorption power of 0.8 up to 700 nm, and the inherent band gaps are reduced to 2.9 eV, thereby increasing the possibility of reaction in visible light. Finally, as a result of the NOx removal test by the ISO test method, about 15.8% was removed for 5 h in the specimen doped with Cu, and the removal efficiency is estimated to be possible up to about 25% when applied with the TPBRC (transparent plastic bar reinforced concrete).

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