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char = w;code = 119
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char = e;code = 101
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char = l;code = 108
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = t;code = 116
char = .;code = 46
result sql = Degradation of methyl and ethyl mercury by singlet oxygen generated from sea water exposed to sunlight or ultraviolet light.
Degradation of methyl and ethyl mercury by singlet oxygen generated from sea water exposed to sunlight or ultraviolet light.
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char = h;code = 104
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char = o;code = 111
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char = s;code = 115
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char = a;code = 97
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char = ;code = 32
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char = t;code = 116
char = e;code = 101
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char = m;code = 109
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char = n;code = 110
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char = a;code = 97
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char = c;code = 99
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char = H;code = 72
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char = S;code = 83
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char = e;code = 101
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char = c;code = 99
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char = t;code = 116
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char = n;code = 110
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char = 1;code = 49
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char = E;code = 69
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char = g;code = 103
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char = a;code = 97
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char = o;code = 111
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char = U;code = 85
char = V;code = 86
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = t;code = 116
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char = ;code = 32
char = N;code = 78
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char = A;code = 65
char = c;code = 99
char = e;code = 101
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char = y;code = 121
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char = L;code = 76
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char = s;code = 115
char = t;code = 116
char = e;code = 101
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char = e;code = 101
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char = w;code = 119
char = a;code = 97
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char = d;code = 100
char = e;code = 101
char = d;code = 100
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char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = s;code = 115
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char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = H;code = 72
char = g;code = 103
char = ;code = 32
char = l;code = 108
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char = s;code = 115
char = ;code = 32
char = d;code = 100
char = u;code = 117
char = r;code = 114
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char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = g;code = 103
char = h;code = 104
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char = e;code = 101
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char = r;code = 114
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char = .;code = 46
char = ;code = 32
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char = a;code = 97
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char = e;code = 101
char = a;code = 97
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char = a;code = 97
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char = e;code = 101
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char = e;code = 101
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char = d;code = 100
char = e;code = 101
char = d;code = 100
char = ;code = 32
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char = s;code = 115
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char = n;code = 110
char = l;code = 108
char = i;code = 105
char = g;code = 103
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char = V;code = 86
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char = ;code = 32
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char = 0;code = 48
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char = N;code = 78
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char = i;code = 105
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char = ;code = 32
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char = e;code = 101
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char = ;code = 32
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char = ;code = 32
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char = ;code = 32
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char = p;code = 112
char = e;code = 101
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char = i;code = 105
char = e;code = 101
char = s;code = 115
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char = p;code = 112
char = o;code = 111
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char = l;code = 108
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char = E;code = 69
char = t;code = 116
char = H;code = 72
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result sql = Photodegradation of methyl mercury (MeHg) and ethyl Hg (EtHg) in sea water was studied by sunlight or ultraviolet (UV) light exposure, and by determining inorganic Hg produced by degradation. Sea water containing 1 microM MeHg or EtHg was exposed to sunlight or UV light. N-Acetyl-L-cysteine was added to the solution for preventing Hg loss during the light exposure. MeHg and EtHg in sea water were degraded by sunlight (> 280 nm), UV light A (320-400 nm) and UV light B (280-320 nm), though the amounts of inorganic Hg produced from MeHg were 1/6th to 1/12th those from EtHg. Inorganic Hg production was greater with increasing concentration of sea water. Degradation of MeHg and EtHg by the UV light A exposure was inhibited by singlet oxygen (1O2) trappers such as NaN3, 1,4-diazabicyclo[2,2,2]octane, histidine, methionine and 2,5-dimethylfuran. On the other hand, inhibitors or scavengers of superoxide anion, hydrogen peroxide or hydroxyl radical did not inhibit the photodegradation of alkyl Hg. These results suggested that 1O2 generated from sea water exposed to sunlight, UV light A or UV light B was the reactive oxygen species mainly responsible for the degradation of MeHg and EtHg.

Publication: Arch. Toxicol. 1993 ;67(5)::365-8.
Publication Date: 1993
Study Author(s): Suda, I;Suda, M;Hirayama, K;
Institution: Kyushu National Agricultural Experiment Station, MAFF, Kumamoto, Japan.
Shortcut link to this study:
Photodegradation of methyl mercury (MeHg) and ethyl Hg (EtHg) in sea water was studied by sunlight or ultraviolet (UV) light exposure, and by determining inorganic Hg produced by degradation. Sea water containing 1 microM MeHg or EtHg was exposed to sunlight or UV light. N-Acetyl-L-cysteine was added to the solution for preventing Hg loss during the light exposure. MeHg and EtHg in sea water were degraded by sunlight (> 280 nm), UV light A (320-400 nm) and UV light B (280-320 nm), though the amounts of inorganic Hg produced from MeHg were 1/6th to 1/12th those from EtHg. Inorganic Hg production was greater with increasing concentration of sea water. Degradation of MeHg and EtHg by the UV light A exposure was inhibited by singlet oxygen (1O2) trappers such as NaN3, 1,4-diazabicyclo[2,2,2]octane, histidine, methionine and 2,5-dimethylfuran. On the other hand, inhibitors or scavengers of superoxide anion, hydrogen peroxide or hydroxyl radical did not inhibit the photodegradation of alkyl Hg. These results suggested that 1O2 generated from sea water exposed to sunlight, UV light A or UV light B was the reactive oxygen species mainly responsible for the degradation of MeHg and EtHg.
PMID: 8368946

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