The disclosure provides a preparation method for a graphene material-based resistive gas sensor array and an application method thereof. The preparation method includes: adding a metal salt solution to a graphene oxide solution to obtain a mixed suspension, adjusting a pH of the mixed suspension and dispersing the mixed suspension under ultrasound, incubating the mixed suspension on a shaker, then washing it with deionized water followed by dispersing it in a deionized water to obtain metal ion-induced graphene oxide self-assembled suspension, and preparing a plurality of parts of the suspension by varying the preparation conditions; and adding the plurality of parts of metal ion-induced graphene oxide self-assembled suspension respectively to fingers of a multi-site interdigitated electrode array, and drying naturally, reducing the plurality of parts of the suspension at 60 to 120° C. for 3 to 30 min. The disclosure achieves uniform loading of a graphene material on a substrate.

Provided is a stress measurement system and a stress measurement method that are capable of measuring the stress level of a subject without taking time and effort. A stress measurement system 1 includes a sensor unit 31 that detects a plurality of detection target gases based on substances contained in a specimen of a subject and outputs a plurality of detection values corresponding to respective detection results of the plurality of detection target gases, and a control unit that determines a stress level of the subject, based on a combination of the plurality of detection values. In addition, the substances contained in the specimen may include a substance serving as a raw material for a brain neurotransmitter.

The present invention provides methods for profiling the microbiome of a subject from a sample obtained from the subject using a Scent Reader/Recorder which detects and records the scent in the headspace of the sample and generates a pattern of sensor signals that can be analyzed using machine learning techniques. The invention further provides methods for detecting changes in the microbiome profile of a subject, and methods for providing health and nutritional recommendations to subjects.

The present invention provides methods for profiling the microbiome of a subject from a sample obtained from the subject using a Scent Reader/Recorder which detects and records the scent in the headspace of the sample and generates a pattern of sensor signals that can be analyzed using machine learning techniques. The invention further provides methods for detecting changes in the microbiome profile of a subject, and methods for providing health and nutritional recommendations to subjects.

Methods of and devices for detecting a measurable characteristic of the gas sample. The methods and devices are able to detect a value of or a change of measurable characteristic (e.g., such as chemical concentrations), a change of chemical compositions and/or biological responses of a living organism that are induced by a stressor. The biological responses are able to include cellular stress, damage, and immune responses. The stressor is able to include an exposure to ionizing radiation. The effects of the stressors are able to be monitored in terms of changes in the chemical concentrations and chemical compositions in an exhaled breath. The chemicals are able to function as bio-markers. The chemicals that are to be monitored are able to include nitric oxide, carbon monoxide, carbon dioxide, ethane, and other molecules related to specific disease resulting from the stressor.

Methods of and devices for detecting a measurable characteristic of the gas sample. The methods and devices are able to detect a value of or a change of measurable characteristic (e.g., such as chemical concentrations), a change of chemical compositions and/or biological responses of a living organism that are induced by a stressor. The biological responses are able to include cellular stress, damage, and immune responses. The stressor is able to include an exposure to ionizing radiation. The effects of the stressors are able to be monitored in terms of changes in the chemical concentrations and chemical compositions in an exhaled breath. The chemicals are able to function as bio-markers. The chemicals that are to be monitored are able to include nitric oxide, carbon monoxide, carbon dioxide, ethane, and other molecules related to specific disease resulting from the stressor.

The disclosure pertains to a system 100 and method for collecting and measuring particles in exhaled air. The system 100 is arranged to allow for examination of the full or substantially the full volume of each exhalation of a subject.

The disclosure pertains to a system 100 and method for collecting and measuring particles in exhaled air. The system 100 is arranged to allow for examination of the full or substantially the full volume of each exhalation of a subject.

In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of benzothiazole of the user and is obtained by a sensor that detects benzothiazole released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of benzothiazole per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of benzothiazole of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.

In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of benzothiazole of the user and is obtained by a sensor that detects benzothiazole released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of benzothiazole per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of benzothiazole of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.