Rugged fibre-optic luminescent sensor for CO2 determination in microalgae photoreactors for biofuel production

Haigh-Flórez, David; Cano-Raya, C.; Bedoya, Maximino; Orellana, Guillermo

doi:10.1016/j.snb.2015.07.052

Cited by 9 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, innovative online sensors can monitor its growth in several aspects. Optical density (OD) sensors [98,99] can determine real-time biomass and dissolved oxygen (DO), CO 2 sensors [100] can screen metabolic activity, pH sensors and nitrate and phosphorous sensors [101] can guarantee a suitable environment and nutrient sufficiency; these can all be applied to ensure high-density cultivation of H. pluvialis. Moreover, the IoT can also act as the base of a decision support system.…”

Section: Potential Applications Of Internet Of Things (Iot) In Carote...mentioning

confidence: 99%

Carotenoid Production from Microalgae: Biosynthesis, Salinity Responses and Novel Biotechnologies

et al. 2021

View full text Add to dashboard Cite

Microalgae are excellent biological factories for high-value products and contain biofunctional carotenoids. Carotenoids are a group of natural pigments with high value in social production and human health. They have been widely used in food additives, pharmaceutics and cosmetics. Astaxanthin, β-carotene and lutein are currently the three carotenoids with the largest market share. Meanwhile, other less studied pigments, such as fucoxanthin and zeaxanthin, also exist in microalgae and have great biofunctional potentials. Since carotenoid accumulation is related to environments and cultivation of microalgae in seawater is a difficult biotechnological problem, the contributions of salt stress on carotenoid accumulation in microalgae need to be revealed for large-scale production. This review comprehensively summarizes the carotenoid biosynthesis and salinity responses of microalgae. Applications of salt stress to induce carotenoid accumulation, potentials of the Internet of Things in microalgae cultivation and future aspects for seawater cultivation are also discussed. As the global market share of carotenoids is still ascending, large-scale, economical and intelligent biotechnologies for carotenoid production play vital roles in the future microalgal economy.

show abstract

Section: Potential Applications Of Internet Of Things (Iot) In Carote...mentioning

confidence: 99%

Carotenoid Production from Microalgae: Biosynthesis, Salinity Responses and Novel Biotechnologies

et al. 2021

View full text Add to dashboard Cite

show abstract

“…For the characterization of the sensing membranes, steady-state measurements were performed using a Hewlett Packard diode array (5) spectrophotometer (model 8453; Nortwalk, CT, US) for absorption measurements. The measurements of the sensing films were performed using a homemade cell holder, so that the gas flux was directed to the sensing membrane.…”

Section: Spectrophotometric Measurementmentioning

confidence: 99%

“…The importance of CO 2 is evident in different fields such as environmental [1], clinical [2], biological [3] and industrial [4,5]. In recent years, the determination of CO 2 has attracted great interest, along with other gases such as oxygen and nitrogen in confined spaces [6].…”

Section: Introductionmentioning

confidence: 99%

Water based-ionic liquid carbon dioxide sensor for applications in the food industry

Vargas-Sansalvador

Erenas

Diamond

et al. 2017

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

A new water-based sensor for carbon dioxide containing an ionic liquid is presented. The sensor is based on the acidity of the CO 2 molecule. The sensor incorporates an ionic liquid in the matrix, which enhances CO 2 solubility, and minimising the response and recovery times of the sensor. The entire concentration range (0-100%) of CO 2 in water has been studied. The sensor is more sensitive at low CO 2 concentrations as is usual in this kind of optical sensor. As the sensor is intended for smart food packaging, one of the most important characteristics is stability, and this has been studied under different conditions of light, temperature and relative humidity. The sensor was found to be stablef or more than 14 days, which is the period of use for the intended application.Pork chops were packed at 4°C and the production of CO 2 studied in conjunction with total bacterial counts over a period of 14 days. The results show that the concentration of CO 2 dioxide increases in time, in correlation with bacterial counts. As the threshold of CO 2 content for human consumption of this meat is 20%, the sensor has been optimised for detection around this concentration.

show abstract

“…The utilization of optical sensors and nanomaterials is therefore experiencing rapid development − and has found various applications in medical, − industrial, and military fields. These sensors are used to measure the pressure, , concentration, , gas concertation, − radiation, − humidity, − temperature, and so forth. − Optical thermometers are an example of such sensors.…”

Section: Introductionmentioning

confidence: 99%

ZnO–SrAl₂O₄:Eu Nanocomposite-Based Optical Sensors for Luminescence Thermometry

Ghahrizjani

Ghafarkani

Janghorban

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Conventional thermometers fail to operate in a variety of medical procedures due to the harsh and sensitive environments required for such applications, and therefore, the development of optical fiber thermometers has gained significant attention. In this study, a ZnO–SrAl2O4:Eu (ZnO–SAO:Eu) nanocomposite has been synthesized by using a CO2 laser, which showed enhanced optical properties and a dynamic range in comparison with the crystalline ones. XRD, EDAX, SEM, and PL spectroscopy investigated the crystalline and optical properties of precursors, and the final nanostructure, and the findings were in agreement with references. Further analysis of the PL spectra in a 0–100 °C range suggests that the optical properties of the ZnO–SAO:Eu nanocomposite show a linear behavior toward temperature alterations. Considering this inter-relation and measuring the decay time for various frequencies helped us calibrate the temperature based on phase angle shift alterations. The curve obtained at 30 Hz frequency exhibits the highest linearity and accuracy (0.33%) due to its relatively high phase shift (60 °C) in the studied temperature range. The fabricated sensor exhibited great sensitivity and repeatability while maintaining an unprecedented structure. Finally, the thermometer’s applicability for future industries was tested by measuring the interior temperature of a dead muscle tissue as it was being heated by a diode laser and it was accompanied by remarkable results. This achievement could make this device a promising addition to the drug delivery science and industry as it could aid the study and optimization of medications that increase the targeted tissues temperature and therefore can be employed in treating tumors that are formed in organic tissues.

show abstract

Rugged fibre-optic luminescent sensor for CO2 determination in microalgae photoreactors for biofuel production

Cited by 9 publications

References 30 publications

Carotenoid Production from Microalgae: Biosynthesis, Salinity Responses and Novel Biotechnologies

Carotenoid Production from Microalgae: Biosynthesis, Salinity Responses and Novel Biotechnologies

Water based-ionic liquid carbon dioxide sensor for applications in the food industry

ZnO–SrAl₂O₄:Eu Nanocomposite-Based Optical Sensors for Luminescence Thermometry

Contact Info

Product

Resources

About

Rugged fibre-optic luminescent sensor for CO2 determination in microalgae photoreactors for biofuel production

Cited by 9 publications

References 30 publications

Carotenoid Production from Microalgae: Biosynthesis, Salinity Responses and Novel Biotechnologies

Carotenoid Production from Microalgae: Biosynthesis, Salinity Responses and Novel Biotechnologies

Water based-ionic liquid carbon dioxide sensor for applications in the food industry

ZnO–SrAl2O4:Eu Nanocomposite-Based Optical Sensors for Luminescence Thermometry

Contact Info

Product

Resources

About

ZnO–SrAl₂O₄:Eu Nanocomposite-Based Optical Sensors for Luminescence Thermometry