US 8,798,931 B2 · Evaluation method for evaluating a state of a photosynthesis sample

Abstract

An object of the present invention is to appropriately and easily evaluate a photosynthetic function of a photosynthetic sample contained in an evaluation sample. An evaluation method for photosynthetic sample according to the present invention is for evaluating a state of a photosynthetic sample with a photosynthetic function based on temporal data of a luminescence amount of delayed luminescence emitted from the photosynthetic sample. First, characteristic values that indicate characteristics are determined for a plurality of time periods in the temporal data. An evaluation value is then computed by weighting the characteristic values. The state of the photosynthetic sample is then evaluated based on the evaluation value.

Claims18

Dependent claims

An evaluation method for evaluating a state of a photosynthetic sample with a photosynthetic function based on temporal data of a luminescence amount of delayed luminescence emitted from the photosynthetic sample, method performed on a hardware processor of a computer and comprising:

a characteristic value computing step of computing on the hardware processor, for a plurality of time periods in the temporal data, characteristic values that indicate characteristics for predefined functions that represent timely evolution of luminescence resulting from different reactions in the photosynthetic sample;
an evaluation value computing step of computing on the hardware processor an evaluation value by weighting the characteristic values;
and
an evaluation step of evaluating on the hardware processor the state of the photosynthetic sample based on the evaluation value by determining a degree of impact of the different reactions in the photosynthetic sample to decide whether the different reactions are harmful or not,
wherein the characteristic value computing step comprises a fitting step of determining, as the characteristic values, coefficient values of the predefined functions so that the temporal data are fitted as a sum of the functions,
in the evaluation value computing step, the evaluation value is computed based on the coefficient values determined in the fitting step, and the evaluation value is an area value computed based on coefficient values of at least one function among the plurality of functions,
the predetermined functions are hill-shaped Lorentz functions, and
when ai, bj, and cj (i=1, 2, 3) are the coefficient values of the plurality of functions and t is a variable indicating an elapsed time from a base time, the predetermined functions are respectively expressed as the following mathematical formulas:
10
c
1
1
+
a
1
⁡
(
t
-
b
1
)
2
,
⁢
10
c
2
1
+
a
2
⁡
(
t
-
b
2
)
2
,
⁢
and
⁢
⁢
10
c
3
1
+
a
3
⁡
(
t
-
b
3
)
2
⁢
.

59 more elements

a characteristic value computing step of computing on the hardware processor, for a plurality of time periods in the temporal data, characteristic values that indicate characteristics for predefined functions that represent timely evolution of luminescence resulting from different reactions in the photosynthetic sample;
an evaluation value computing step of computing on the hardware processor an evaluation value by weighting the characteristic values;
an evaluation step of evaluating on the hardware processor the state of the photosynthetic sample based on the evaluation value by determining a degree of impact of the different reactions in the photosynthetic sample to decide whether the different reactions are harmful or not;
and
a measuring step of measuring the luminescence amount with time of the delayed luminescence emitted from the photosynthetic sample and making the measurement data the temporal data, wherein
the measuring step further comprises a first excitation step of illuminating a first excitation light onto the photosynthetic sample under a predetermined first illumination condition;
and a second excitation step of illuminating, after the first excitation step, a second excitation light onto the photosynthetic sample under a second illumination condition that is less in light energy integration value than the first illumination condition;
in the characteristic value computing step, the characteristic values are computed based on temporal data obtained after the second excitation step, and
the predetermined functions are hill-shaped Lorentz functions, and
when ai, bi, and ci (i=1, 2, 3) are the coefficient values of the plurality of functions and t is a variable indicating an elapsed time from a base time, the predetermined functions are respectively expressed as the following mathematical formulas:
10
c
1
1
+
a
1
⁡
(
t
-
b
1
)
2
,
⁢
10
c
2
1
+
a
2
⁡
(
t
-
b
2
)
2
,
⁢
and
⁢
⁢
10
c
3
1
+
a
3
⁡
(
t
-
b
3
)
2
.

60 more elements

An evaluation system for photosynthetic sample, evaluating a state of a photosynthetic sample with a photosynthetic function based on temporal data of a luminescence amount of delayed luminescence emitted from the photosynthetic sample and comprising:

a characteristic value computing unit, computing, for a plurality of time periods in the temporal data, characteristic values that indicate characteristics for predefined functions that represent timely evolution of luminescence resulting from different reactions in the photosynthetic sample;
an evaluation value computing unit, computing an evaluation value by weighting the characteristic values;
and
an evaluating unit, evaluating the state of the photosynthetic sample based on the evaluation value by determining a degree of impact of the different reactions in the photosynthetic sample to decide whether the different reactions are harmful or not,
wherein the characteristic value computing unit comprises a fitting transmit for determining, as the characteristic values, coefficient values of the predefined functions so that the temporal data are fitted as a sum of the functions,
in the evaluation value computing unit, the evaluation value is computed based on the coefficient values determined in the fitting unit, and the evaluation value is an area value computed based on coefficient values of at least one function among the plurality of functions,
the predefined functions are hill-shaped Lorentz functions, and
when ai, bi, and ci (i=1, 2, 3) are the coefficient values of the plurality of functions and t is a variable indicating an elapsed time from a base time, the predetermined functions are respectively expressed as the following mathematical formulas:
10
c
1
1
+
a
1
⁡
(
t
-
b
1
)
2
,
⁢
10
c
2
1
+
a
2
⁡
(
t
-
b
2
)
2
,
⁢
and
⁢
⁢
10
c
3
1
+
a
3
⁡
(
t
-
b
3
)
2
.

58 more elements

A non-transitory computer readable medium having an evaluation program recorded thereon, the evaluation program configured for performing a method that makes a hardware computer evaluate a state of a photosynthetic sample with a photosynthetic function based on temporal data of a luminescence amount of delayed luminescence emitted from the photosynthetic sample when executed on said hardware computer, the method comprising:

a characteristic value computing step of computing, for a plurality of time periods in the temporal data, characteristic values that indicate characteristics for predefined functions that represent timely evolution of luminescence resulting from different reactions in the photosynthetic sample;
an evaluation value computing step of computing an evaluation value by weighting the characteristic values;
and
an evaluating step of evaluating the state of the photosynthetic sample based on the evaluation value by determining a degree of impact of the different reactions in the photosynthetic sample to decide whether the different reactions are harmful or not,
wherein the characteristic value computing step comprises a fitting step for determining as the characteristic values, coefficient values of the predefined functions so that the temporal data are fitted as a sum of the functions,
in the evaluation value computing step, the evaluation value is computed based on the coefficient values determined in the fitting step, and the evaluation value is an area value computed based on coefficient values of at least one function among the plurality of functions,
the predefined functions are hill-shaped Lorentz functions, and
when ai, bi, and ci (i=1, 2, 3) are the coefficient values of the plurality of functions and t is a variable indicating an elapsed time from a base time, the predetermined, functions are respectively expressed as the following mathematical formulas:
10
c
1
1
+
a
1
⁡
(
t
-
b
1
)
2
,
⁢
10
c
2
1
+
a
2
⁡
(
t
-
b
2
)
2
,
⁢
and
⁢
⁢
10
c
3
1
+
a
3
⁡
(
t
-
b
3
)
2
.

58 more elements

Dependencies are inferred from the claim text.

Evaluation method for evaluating a state of a photosynthesis sample

Life of this patent

Evaluation method for evaluating a state of a photosynthesis sample

Life of this patent

Abstract

Claims18