Arkansas forest industries, 1977

Bertelson, Daniel F.

doi:10.2737/so-rb-75

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…[6][7][8] Nitrospiropyrans are members of one of the most common families of photochromic compounds. [9][10][11][12][13] They switch from a colorless to a colored state under ultraviolet irradiation and revert back to the original species in the dark. Their photochemical behavior and synthetic accessibility have already encouraged the integration of these compounds in a diversity of photoresponsive materials.…”

Section: Introductionmentioning

confidence: 99%

Photochromic Oxazines with Extended Conjugation

et al. 2009

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We synthesized four compounds with indole and benzooxazine fragments fused in their molecular skeleton and differing in the substituent in the para position, relative to the oxygen atom, of their phenoxy chromophore. This particular substituent extends the conjugation of the phenoxy chromophore and shifts its absorption bathochromically by up to 60 nm, relative to a parent compound with a 4-nitrophenoxy group. The 1,3-oxazine ring of all compounds opens upon addition of base to generate a hemiaminal incorporating a phenolate chromophore. Once again, the substituents on this fragment shift its absorption bathochromically by up to 60 nm, relative to the parent compound. Upon laser excitation at a wavelength within the absorption range of the phenoxy chromophore, the 1,3-oxazine ring of the compound incorporating a 4-nitrophenyl substituent opens in less than 6 ns to generate a zwitterionic isomer with a quantum yield of 0.11 in acetonitrile. Under these conditions, the photogenerated isomer has

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Section: Introductionmentioning

confidence: 99%

Photochromic Oxazines with Extended Conjugation

et al. 2009

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“…With the exception of the pulpwood information, which is based on a report by Hutchins (1987), product output data for 1975 to 1985 presented in this report are based on the industry canvass. Data for 1974 was published as part of the 1975 survey of east Texas (Bertelson 1975).…”

Section: Tinliber Products Outputmentioning

confidence: 99%

“…The survey was conducted by the Forest Inventory and Analysis Unit (FIA) of the USDA Forest Service, Southern Forest Experiment Station. Earlier surveys were completed for 1904 (Bray 1904), 1935(Cruikshank 1938Cruikshank and Eldredge 1939;Davis 1940), 1953-1 955 (USDA-FS 1956, 1965 (Sternitzke 1967), and 1975(Murphy 1976). …”

mentioning

confidence: 99%

Forest resources of east Texas

McWilliams¹,

Lord²

1988

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“…In addition to roundwood the pulpmills used the equivalent of 1.3 million cords of plant Figure 2.-Pulpwood production i n Arkansas, 1958-1971 byproducts in 1971. This volume represents over two fifths of the total pulpwood production in the State.…”

Section: Pulpwoodmentioning

confidence: 99%