effective quantum yield

USAGE SUMMARY

The phrase "effective quantum yield" is correct and usable in written English.
It can be used in scientific contexts, particularly in fields like photochemistry or biology, to describe the efficiency of a process that converts absorbed light into a specific outcome. Example: "The effective quantum yield of the photosynthetic reaction was measured to determine the efficiency of light energy conversion."

✓ Grammatically correct

Science

Human-verified examples from authoritative sources

Exact Expressions

50 human-written examples

Two-way ANOVAs and t-tests of effective quantum yield and maximum quantum yield reveal significant effects of treatment (P<0.0001), time (P<0.0001), and treatment x time (P<0.0001) (Supplementary Tables S1 and S2 online).

Nature

Light-acclimated effective quantum yield of PSII (ΔF/Fm') was measured at experimental solar noon.

Nature

During the final phase, effective quantum yield and Qm stabilized in the cold treatment.

Nature

In contrast, heat-treated corals initially did not experience a loss in effective quantum yield or an increase in Qm.

Nature

The effective quantum yield (ΦPSII) of light-adapted needles revealed minor differences between provenances at the field site Schluchsee, with higher values in SAL compared to the coastal provenances (Fig. 2G, Table 2).

Nature

Values of maximum excitation pressure over PSII (Qm), the effective quantum yield at midday relative to maximum quantum yield (see Methods), reflected the differences between cold and heat-treated corals.

Nature

Human-verified similar examples from authoritative sources

Similar Expressions

10 human-written examples

Because RLCs measure effective quantum yields over a range of changing actinic irradiances, we hypothesized that the response parameters might be less sensitive to diurnal light history effects.

Journal of Experimental Marine Biology and Ecology

After 10 days UV treatment, both the maximum and effective quantum yields of PSII decreased in the wild type by 10% but were unaffected in either of the transformed lines.

Journal of Plant Physiology

Our results indicate that the RLC parameters, alpha and ETRmax, significantly changed diurnally, as was previously found for both maximum and effective quantum yields, but the diurnal patterns were variable among the 10 basins.

Journal of Experimental Marine Biology and Ecology

PS II inactivation (I) was calculated (as a proportion) from light adapted effective quantum yields (ΔF/Fm') as described above.

Plosone

Light adapted effective quantum yields (ΔF/Fm') were calculated by the formula: (Fm'−Ft)/Fm' [46], where Fm' = maximal fluorescent yield under light conditions and Ft = fluorescence before a saturating pulse.

Plosone

Expert writing Tips

Best practice

When discussing photosynthetic performance, specify the conditions under which the "effective quantum yield" was measured, such as light intensity and temperature, as these factors can significantly influence the results.

Common error

Avoid using "effective quantum yield" and maximum quantum yield (Fv/Fm) interchangeably. "Effective quantum yield" (ΔF/Fm') reflects the current operating efficiency of Photosystem II under specific light conditions, while maximum quantum yield represents the potential efficiency in a dark-adapted state.

Linguistic Context

The phrase "effective quantum yield" functions as a noun phrase, specifically an adjective-noun combination, that describes a quantifiable measure of photosynthetic efficiency. As Ludwig AI states, this phrase is usable in scientific contexts to describe the efficiency of light converted into a specific outcome.

Expression frequency: Very common

Frequent in

Science

100%

Less common in

News & Media

0%

Formal & Business

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Academia

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Ludwig's WRAP-UP

In summary, "effective quantum yield" is a well-established and grammatically sound term used in scientific fields, particularly in the study of photosynthesis. As Ludwig AI points out, this phrase is frequently seen in scientific contexts to describe the proficiency of light energy conversion into a specific outcome. Its usage is widespread in scientific literature, particularly within journals such as Nature, indicating its acceptance and relevance within the scientific community. When using this term, consider its scientific register and potential confusion with maximum quantum yield. While alternatives exist, such as "quantum efficiency", the phrase's specificity to light conversion in photosynthetic systems makes it a powerful and precise descriptor.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

quantum efficiency

Focuses more broadly on the efficiency of a quantum process, not necessarily limited to light energy conversion.

photosynthetic efficiency

Specifically refers to the efficiency of photosynthesis, a more specific context than the original phrase.

light conversion efficiency

Emphasizes the conversion of light energy, applicable in contexts beyond just quantum processes.

quantum yield of photosynthesis

More explicitly links quantum yield to the process of photosynthesis.

PSII quantum yield

Specifically refers to the quantum yield of Photosystem II, a particular component of photosynthesis.

photosystem II efficiency

Focuses on the efficiency of Photosystem II, a key part of the photosynthetic process.

efficiency of light absorption

Highlights the absorption of light as the key process being measured for efficiency.

rate of electron transport

Describes a related process, electron transport, which is often linked to quantum yield measurements.

energy conversion rate

Focuses on energy conversion in general, lacking the specificity of light and quantum processes.

fluorescence quantum yield

Specifies the quantum yield associated with fluorescence, a related but distinct phenomenon.

FAQs

How is "effective quantum yield" measured?

The "effective quantum yield" of Photosystem II (ΦPSII) is commonly measured using a pulse-amplitude-modulated (PAM) fluorometer. The calculation involves measuring the difference between the maximum fluorescence (Fm') and the steady-state fluorescence (Fs) of a light-adapted sample, divided by Fm': ΦPSII = (Fm' - Fs) / Fm'.

What does a change in "effective quantum yield" indicate?

A decrease in "effective quantum yield" often indicates that a plant or algae sample is experiencing stress, such as high light intensity, nutrient deficiency, or exposure to pollutants. This reduction suggests that the photosynthetic machinery is less efficient at converting light energy into chemical energy.

What is the relationship between "effective quantum yield" and electron transport rate?

The "effective quantum yield" (ΦPSII) is directly related to the electron transport rate (ETR). ETR can be estimated by multiplying ΦPSII by the incident light intensity and a factor that accounts for the fraction of light absorbed by the sample. Therefore, a higher "effective quantum yield" generally corresponds to a higher electron transport rate.

What are some alternatives to "effective quantum yield"?

While "effective quantum yield" is a standard term, you can use alternatives like "quantum efficiency" or "photosynthetic efficiency" depending on the specific context. The most suitable alternative will depend on whether you want to emphasize the quantum nature of the process or its role in photosynthesis.