# Apparent signals and follow-up tests — section 8

## Stored chemical energy
Pages: Electrochemistry report · pp. 115 and 186–187

Temporary recombiner failures allowed gas to accumulate before releasing chemical heat. Pressure records helped distinguish these events from a nuclear heat source.

## An apparent positive population in UHTP
Pages: Electrochemistry report · p. 123

A faulty temperature sensor in one cell accounted for 64% of readings at or above the 100 mW screening threshold. The 80-cell campaign found no significant excess heat.

## Changes in open-cell calorimetry
Pages: Electrochemistry report · pp. 186–187

Falling liquid levels and foaming changed heat transfer and invalidated calibration, producing apparent performance ratios as high as 1.6 in Staker replications.

## A hotter sample in deuterium
Pages: Pressure report · pp. 73–74

Optical temperature differences arose from gas absorption. Later thermocouple differences were reproduced with platinum controls and explained by hydrogen cooling more effectively than deuterium.

## An apparent melting-point difference
Pages: Pressure report · pp. 75–76

Re-engineering thermocouple feedthroughs corrected a cold-junction compensation error. The revised TI-11 measurements largely eliminated the apparent hydrogen/deuterium melting-point difference.

## Laser-induced holes and melt spots
Pages: Pressure report · pp. 289–291

Nonlinear optical effects in the pressure window distorted the illumination. Increasing the sample-to-window distance removed the effect and identified the features as direct laser damage.

## An apparent optical heat signal
Pages: Pressure report · pp. 177–181

Measuring through an adjacent gold layer showed that the apparent deuterium enhancement arose from different optical responses, not anomalous heat.

## A nonrepeating calorimeter signal
Pages: Pressure report · pp. 267–268

An early passive test at 100 ksi D₂ and 50 °C produced unexplained heat-flow spikes. Their cause was never definitively located, and the signal did not recur in subsequent tests; the team did not accept it as evidence of AHE.