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Journal articles on the topic 'Senzor CO2'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Handlogten, Mary E., Naoki Shiraishi, Hisataka Awata, Chunfa Huang, and R. Tyler Miller. "Extracellular Ca2+-sensing receptor is a promiscuous divalent cation sensor that responds to lead." American Journal of Physiology-Renal Physiology 279, no. 6 (2000): F1083—F1091. http://dx.doi.org/10.1152/ajprenal.2000.279.6.f1083.

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The extracellular Ca2+-sensing receptor (CaR) responds to polycations, including Ca2+ and neomycin. This receptor is a physiological regulator of systemic Ca2+ metabolism and may also mediate the toxic effects of hypercalcemia. A number of divalent cations, including Pb2+, Co2+, Cd2+, and Fe2+, are toxic to the kidney, brain, and other tissues where the CaR is expressed. To determine which divalent cations can activate the CaR, we expressed the human CaR in HEK-293 cells and measured activation of phospholipase A2(PLA2) and the mitogen-activated protein kinase p42ERK in response to potential a

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Chen, Guo Feng, Hsiao Pin Tsai, Ping Shan Lai, and Ming Yuan Liao. "Functionalized Mn2+ Doped Zinc Sulfide Quantum Dots as a Metal Ion Sensor for Industrial Wastes." Applied Mechanics and Materials 284-287 (January 2013): 138–42. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.138.

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L-cysteine capped Mn2+-doped ZnS quantum dots are prepared as a fluorescence probe for the detection of heavy metal contaminants, such as As2O42-, Cd2+, CrO42-, Ni2+, Zn2+, Ca2+, Fe2+, Cu2+, Pb2+, Co2+ and Mn2+ ions. The results show L-cysteine capped Mn2+-doped ZnS quantum dots exhibit good sensitivity and selectivity for the detection of copper ions. The relationship between the detection limit, linear range and the concentration of quantum dots are examined. The optimum fluorescence sensor is obtained at the L-cysteine-ZnS QDs concentration of 2 mg/mL and pH 7.0 in phosphate buffer. The lim

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3

ALICI, Önder, and Arjan Akbar HAMEED. "Synthesis of New Schiff Bases Including of Terephthalohydrazide and Sensor Application." Eurasia Proceedings of Science Technology Engineering and Mathematics 29 (December 15, 2024): 113–19. https://doi.org/10.55549/epstem.1563435.

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Schiff bases are compounds that are formed by the reaction of aldehydes or ketones with primary amines, usually in alcoholic solution and in a neutral environment, and contain carbon-nitrogen (C=N) double bonds, called the azomethine or imine group, in their structure because of the condensation reaction. In recent years, Schiff Base-based molecular sensors have been one of the most emphasized topics by scientists. In this study, the 3'-formyl-4'-hydroxy-[1,1'-biphenyl]-4-carbonitrile was obtained as literature information (Alici & Erdemir, 2015). Then, for the target compound, which is Sc

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Bouyer, Patrice, Yuehan Zhou, and Walter F. Boron. "An increase in intracellular calcium concentration that is induced by basolateral CO2 in rabbit renal proximal tubule." American Journal of Physiology-Renal Physiology 285, no. 4 (2003): F674—F687. http://dx.doi.org/10.1152/ajprenal.00107.2003.

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Working with isolated perfused S2 proximal tubules, we asked whether the basolateral CO2 sensor acts, in part, by raising intracellular Ca2+ concentration ([Ca2+]i), monitored with the dye fura 2 (or fura-PE3). In paired experiments, adding 5% CO2/22 mM [Formula: see text] (constant pH 7.40) to the bath (basolateral) solution caused [Ca2+]i to increase from 57 ± 3 to 97 ± 9nM( n = 8, P < 0.002), whereas the same maneuver in the lumen had no effect. Intracellular pH (pHi), measured with the dye BCECF, fell by 0.54 ± 0.08 ( n = 14) when we added [Formula: see text] to the lumen. In 14 tubules

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Lee, Mingu, Syo Sugahara, Daijiro Omi, Michiya Fujita, and Kenichi Tonokura. "Development of continuous monitoring of ambient carbon dioxide using near-infrared quartz-enhanced photoacoustic spectroscopy." Japanese Journal of Applied Physics 63, no. 1 (2023): 017001. http://dx.doi.org/10.35848/1347-4065/ad1011.

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Abstract We demonstrate continuous measurement of carbon dioxide (CO2) in the atmosphere using quartz-enhanced photoacoustic spectroscopy (QEPAS) at 2.008 μm with a fiber-coupled distributed-feedback laser. The QEPAS sensor is composed of a quartz tuning fork with a resonance frequency f 0 of 12.4 kHz. The photoacoustic second-harmonic (2f) signal resulting from CO2 absorption was detected using a digital lock-in amplifier. The photoacoustic signal is proportional to the laser power. The limit of detection at an absorption line of 4980.13161 cm−1 with a line strength of 3.87 × 10−22 cm2 molecu

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Rui Qiao, Rui Qiao, Hai Yun Fan Hai Yun Fan, Cui Bing Bai Cui Bing Bai, et al. "Using Heterocycle to Improve the Selectivity of Rhodamine-6G Dye: Synthesis of Pyrrole-Modified Rhodamine-6G and its Recognition to Zn2+." Journal of the chemical society of pakistan 41, no. 2 (2019): 300. http://dx.doi.org/10.52568/000732/jcsp/41.02.2019.

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The fluorescent sensor XQN for Zn2+ based on rhodamine-6G have been designed and synthesized. XQN showed fluorescent specific selectivity and high sensitivity for Zn2+ against other metal ions such as Fe3+, Cr3+, Hg2+, Ag+, Ca2+, Cu2+, Pb2+, Cd2+, Ni2+, Co2+ and Mg2+ in CH3CN-PBS(phosphate buffer saline) (10 mM, v/v=7:3, pH = 7.4) solution. The distinct color change and the rapid emergence of fluorescence emission provided naked-eyes detection for Zn2+. The test strip results showed that these sensors could act as a convenient and efficient Zn2+ test kit. The recognition mechanism of the senso

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Zhang, You-Ming, Xiao-Peng Chen, Guo-Yan Liang, et al. "A water-soluble fluorescent chemosensor based on Asp functionalized naphthalimide for successive detection Fe3+ and H2PO4−." Canadian Journal of Chemistry 96, no. 4 (2018): 363–70. http://dx.doi.org/10.1139/cjc-2017-0451.

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The selective recognition of target ions in water is very important and the development of novel water-soluble chemosensor is still an intriguing challenge. Herein, a novel water-soluble fluorescent sensor based on aspartic acid (Asp) functionalized 1,8-naphthalimide derivative (Asp-NI) has been designed and synthesized. The sensor Asp-NI could dissolve in water and successively detect Fe3+ and H2PO4− in water solution with high selectivity and sensitivity. The detection limits are 4.97 × 10−7 mol/L for Fe3+ and 5.27 × 10−6 mol/L for H2PO4−. Other coexistent competitive metal ions (Hg2+, Ag+,

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Sabando, Bravo Kenia Elizabeth, Mendoza Marlon Renne Navia, and Jorge Luis Zambrano-Martinez. "Review of studies on sensor networks for CO2 monitoring." Serie Científica de la Universidad de las Ciencias Informáticas 16, no. 4 (2023): 24–41. https://doi.org/10.5281/zenodo.10070855.

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Currently, in metropolitan areas, the amounts of polluting gases are increasing, which causes the growth of global warming. One of the leading gases causing the greenhouse effect is carbon dioxide (CO2). For this reason, its monitoring and control is a highly studied topic worldwide due to the various problems in the ecosystem. One of the ways to monitor CO2 levels in the environment is through devices with specialised sensors and wireless communication through a sensor network. This research paper presents a bibliographic review of studies on sensor networks for CO2 monitoring. The objective

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Floresta, Giuseppe, Nunzio Cardullo, Carmela Spatafora, Antonio Rescifina, and Corrado Tringali. "A Rare Natural Benzo[k,l]xanthene as a Turn-Off Fluorescent Sensor for Cu2+ Ion." International Journal of Molecular Sciences 21, no. 18 (2020): 6933. http://dx.doi.org/10.3390/ijms21186933.

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Rapid and efficient analyses of copper ions are crucial to providing key information for Cu2+ in living cells because of their biological importance. In this study, we reported one new turn-off fluorescent sensor for Cu2+ with a benzo[k,l]xanthene core, which served as an efficient cation sensor for copper ion over a wide range of other cations (Na+, K+, Ag+, Hg2+, Cd2+, Co2+, Ni2+, Zn2+, Mg2+, and Fe3+) owing to the catechol group in the aromatic core. The sensor showed selectivity for Cu2+ over other ions; the logKβ for Cu2+ binding to compound 1 had a value of 13.265. In the presence of Cu2

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FAHRENFORT, I., T. SJOERDSMA, H. RIPPS, and M. KAMERMANS. "Cobalt ions inhibit negative feedback in the outer retina by blocking hemichannels on horizontal cells." Visual Neuroscience 21, no. 4 (2004): 501–11. http://dx.doi.org/10.1017/s095252380421402x.

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In goldfish, negative feedback from horizontal cells to cones shifts the activation function of the Ca2+ current of the cones to more negative potentials. This shift increases the amount of Ca2+ flowing into the cones, resulting in an increase in glutamate release. The increased glutamate release forms the basis of the feedback-mediated responses in second-order neurons, such as the surround-induced responses of bipolar cells and the spectral coding of horizontal cells. Low concentrations of Co2+ block these feedback-mediated responses in turtle retina. The mechanism by which this is accomplis

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De Acha, Nerea, César Elosúa, and Francisco J. Arregui. "Development of an Aptamer Based Luminescent Optical Fiber Sensor for the Continuous Monitoring of Hg2+ in Aqueous Media." Sensors 20, no. 8 (2020): 2372. http://dx.doi.org/10.3390/s20082372.

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A fluorescent optical fiber sensor for the detection of mercury (Hg2+) ions in aqueous solutions is presented in this work. The sensor was based on a fluorophore-labeled thymine (T)-rich oligodeoxyribonucleotide (ON) sequence that was directly immobilized onto the tip of a tapered optical fiber. In the presence of mercury ions, the formation of T–Hg2+-T mismatches quenches the fluorescence emission by the labeled fluorophore, which enables the measurement of Hg2+ ions in aqueous solutions. Thus, in contrast to commonly designed sensors, neither a fluorescence quencher nor a complementary ON se

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Zhang Qianqian, 张倩倩, 吴涛 Wu Tao, 孙城林 Sun Chenglin та ін. "基于中空波导光纤的CO2气体传感器稳定性的研究". Acta Optica Sinica 41, № 15 (2021): 1528001. http://dx.doi.org/10.3788/aos202141.1528001.

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Liu Can, 刘灿, 靳长明 Jin Changming, 谭秋林 Tan Qiulin, 张磊 Zhang Lei та 张雅楠 Zhang Yanan. "具有温度补偿的非分光红外CO2传感器设计". Infrared and Laser Engineering 51, № 3 (2022): 20210746. http://dx.doi.org/10.3788/irla20210746.

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Yin Youwei, 尹有为, 宋旭锋 Song Xufeng, 杨博 Yang Bo, 王玉兰 Wang Yulan та 史思琦 Shi Siqi. "扩散式非色散红外CO2传感器及其温度补偿". Acta Optica Sinica 45, № 10 (2025): 1028001. https://doi.org/10.3788/aos250432.

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Boudaden, Jamila, Armin Klumpp, Hanns-Erik Endres, and Ignaz Eisele. "Capacitive CO2 Sensor." Proceedings 1, no. 4 (2017): 472. http://dx.doi.org/10.3390/proceedings1040472.

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Harsanyi, Krisztina, and Stuart c. Mangel. "Modulation of cone to horizontal cell transmission by Calcium and pH in the fish retina." Visual Neuroscience 10, no. 1 (1993): 81–91. http://dx.doi.org/10.1017/s0952523800003242.

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AbstractThe effects of small changes in the calcium and sodium concentrations and in the pH of superfusion medium on the membrane potential and light-evoked responses of cone horizontal cells in the goldfish retina were examined. Conventional intracellular recording, a bicarbonate-based superfusion medium, and a specially designed superfusion apparatus that reduced pressure wave disturbances were used. An increase in the extracellular calcium concentration, [Ca2+]∘ from control levels (0.1 mM) to 1.0 mM hyperpolarized cone horizontal cells and reduced the magnitude of their light responses at

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Matsubara, Shogo, Shinichiro Kaneko, Shinji Morimoto, Shoichi Shimizu, Tatsumi Ishihara, and Yusaku Takita. "A practical capacitive type CO2 sensor using CeO2/BaCO3/CuO ceramics." Sensors and Actuators B: Chemical 65, no. 1-3 (2000): 128–32. http://dx.doi.org/10.1016/s0925-4005(99)00407-4.

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Ahire, Satish Arvind, Ashwini Ashok Bachhav, Thansingh Bhavsing Pawar, Arun Vitthal Patil, Swapnil Sampatrao Shendge, and Prashant Bhimrao Koli. "Green Synthesis of Ceria Nanoparticles Using Azadirachta Indica Plant Extract: Characterization, Gas Sensing and Antibacterial Studies." Material Science Research India 18, no. 3 (2021): 285–97. http://dx.doi.org/10.13005/msri/180304.

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In the present investigation we have fabricated the cerium dioxide (CeO2) nanoparticles by green route. While preparing the cerium dioxide nanoparticles by co-precipitation method, Neem leaf extract mixed into the precursor of cerium. The synthesized nanoparticles of CeO2 were used for the preparation of thick film sensor by using screen printing strategy. The fabricated CeO2 sensor was characterized by XRD, SEM, EDS and TEM techniques. The structural characteristics investigated by x-ray diffraction technique (XRD). XRD confirms the formation of cubic lattice of CeO2 material. The surface, te

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Hayashi, Jon H., and Ann E. Stuart. "Currents in the presynaptic terminal arbors of barnacle photoreceptors." Visual Neuroscience 10, no. 2 (1993): 261–70. http://dx.doi.org/10.1017/s0952523800003667.

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AbstractWe have described the currents flowing across the presynaptic membranes of the four median photoreceptors of the giant barnacle, Balanus nubilus, using a quasi-voltage clamp arrangement. Membrane potential, measured in the terminal region of one photoreceptor, was controlled in all four terminals by feedback current supplied through the nerve containing the photoreceptors’ axons. The [Ca2+] ∘ in the saline was reduced to decrease the Ca2+ current, enabling better voltage control, and tetraethylammonium ion (TEA, 20 mM) was added to block a fast voltage-dependent K+ conductance.Depolari

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Dong Helei, 董和磊, 刘灿 Liu Can, 靳长明 Jin Changming, 张磊 Zhang Lei, 张雅楠 Zhang Yanan та 谭秋林 Tan Qiulin. "双通道非分光红外CO2气体传感器设计与测试". Chinese Journal of Lasers 50, № 2 (2023): 0210003. http://dx.doi.org/10.3788/cjl220955.

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Karadöl, Hayrettin. "Development of new two methods based on low-cost sensors for determination of calcium carbonate contents of soils." Pakistan Journal of Agricultural Sciences 59, no. 06 (2022): 965–72. http://dx.doi.org/10.21162/pakjas/22.148.

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The chemical analysis of CaCO3 contents of soils provide information about not only efficiency of soil for supplying plant with nutrients but also identification of factors affecting this efficiency in the soil. The aim of the current experiment was to develop new methods based on sensors and compare with conventional Scheibler method. The CO2 liberated by the action of HCl on CaCO3 content of the soil in a reaction bottle and an accumulation chamber was determined by pressure sensor and CO2 sensor, respectively. The CaCO3 contents of soils were estimated using the regression equation of stand

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Widodo, Slamet, M. Miftakul Amin, and Adi Sutrisman. "The Design of The Monitoring Tools Of Clean Air Condition And Dangerous Gas CO, CO2 CH4 In Chemical Laboratory By Using Fuzzy Logic Based On Microcontroller." E3S Web of Conferences 31 (2018): 10008. http://dx.doi.org/10.1051/e3sconf/20183110008.

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There are many phenomena that human are exposed to toxins from certain types such as of CO2, CO2 and CH4 gases. The device used to detect large amounts of CO, CO2, and CH4 gas in air in enclosed spaces using MQ 135 gas sensors of different types based on the three sensitivity of the Gas. The results of testing the use of sensors MQ 135 on the gas content of CO, CO2 and CH4 received by the sensor is still in the form of ppm based on the maximum ppm detection range of each sensor. Active sensor detects CO 120 ppm gas, CO2 1600 ppm and CH4 1ppm "standby 1" air condition with intermediate rotary f

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Yasmin Sofea Rosland, Nur, Khadijah Ismail, Siti Nooraya Mohd Tawil, and Siti Hasnawati Jamal. "PEDOT:PSS/GO NANOCOMPOSITE FOR INDOOR CO2 SENSOR." International Journal of Advanced Research 9, no. 08 (2021): 473–81. http://dx.doi.org/10.21474/ijar01/13292.

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Carbon dioxide (CO2) which is a colourless and odourless gas, requires an efficient detection, as excessive amount in the environment would possibly leads to global warming. This work discusses on an environmentally friendly and non-toxic CO2 sensor for indoor air monitoring. The fabricated sensor is developed by using poly(3,4ethylenedioxythiophene):poly(4styrenesulfonate)/ graphene oxide (PEDOT:PSS/GO) nanocomposite. Nanocomposite characterisations are performed by using field-emission scanning electron microscope (FESEM) and X-ray diffraction (XRD) to confirm excellent properties of PEDOT:P

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Amsar, Amsar, Khairuman Khairuman, and Marlina Marlina. "PERANCANGAN ALAT PENDETEKSI CO2 MENGGUNAKAN SENSOR MQ-2 BERBASIS INTERNET OF THING." METHOMIKA Jurnal Manajemen Informatika dan Komputerisasi Akuntansi 4, no. 1 (2020): 73–79. http://dx.doi.org/10.46880/jmika.vol4no1.pp73-79.

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Salah satu gas yang sangat berbahaya bagi kesehatan manusia adalah Gas CO2, untuk mengetahui kadar di tempat tertentu mengandung CO2 tanpa menggunakan alat bantu pendeteksi akan sulit dilakukan, karena Gas CO2 tersebut merupakan zat yang tidak dapat dilihat langsung oleh mata manusia, maka dalam penelitian ini dirancang sebuah alat pendeteksi CO2 yang dapat memberikan notifikasi kadar CO2 ke telegram berbasis Internet Of Things (IOT). Dalam peneltian ini alat yang digunakan untuk pengukuran kadar CO2 dengan menggunakan sensor MQ-2 untuk mendeteksi kadar dari karbon dioksida, sehingga kadar CO2

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Amsar, Amsar, Khairuman Khairuman, and Marlina Marlina. "Perancangan Alat Pendeteksi CO2 Menggunakan Sensor MQ-2 Berbasis Internet Of Thing." METHOMIKA: Jurnal Manajemen Informatika dan Komputerisasi Akuntansi 4, no. 1 (2020): 73–79. http://dx.doi.org/10.46880/jmika.v4i1.143.

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Salah satu gas yang sangat berbahaya bagi kesehatan manusia adalah Gas CO2, untuk mengetahui kadar di tempat tertentu mengandung CO2 tanpa menggunakan alat bantu pendeteksi akan sulit dilakukan, karena Gas CO2 tersebut merupakan zat yang tidak dapat dilihat langsung oleh mata manusia, maka dalam penelitian ini dirancang sebuah alat pendeteksi CO2 yang dapat memberikan notifikasi kadar CO2 ke telegram berbasis Internet Of Things (IOT) . dalam peneltian ini alat yang digunakan untuk pengukuran kadar CO2 dengan menggunakan sensor MQ-2 untuk mendeteksi kadar dari karbon dioksida, sehingga kadar CO

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El-Safoury, Mahmoud, Christian Weber, Hassan Yassine, Jürgen Wöllenstein, and Katrin Schmitt. "Towards a Miniaturized Photoacoustic Sensor for Transcutaneous CO2 Monitoring." Sensors 24, no. 2 (2024): 457. http://dx.doi.org/10.3390/s24020457.

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A photoacoustic sensor system (PAS) intended for carbon dioxide (CO2) blood gas detection is presented. The development focuses on a photoacoustic (PA) sensor based on the so-called two-chamber principle, i.e., comprising a measuring cell and a detection chamber. The aim is the reliable continuous monitoring of transcutaneous CO2 values, which is very important, for example, in intensive care unit patient monitoring. An infrared light-emitting diode (LED) with an emission peak wavelength at 4.3 µm was used as a light source. A micro-electro-mechanical system (MEMS) microphone and the target ga

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Wang, Hai Rong, Jun Qiang Ren, Guo Liang Sun, and Di Cen. "Micro CO₂ Sensor Based on Li₂CO₃, Pt | Li₃PO₄ | Pt, Li₂TiO₃-TiO₂ Structure." Applied Mechanics and Materials 44-47 (December 2010): 2747–51. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2747.

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This paper presents a micro solid electrolyte CO2 gas sensor in which Li2CO3, Li2TiO3-TiO2 serves as sensing and reference electrodes respectively, and the Li3PO4 film acts as the electrolyte. The sensor was constructed in the sequent layers of O2, CO2, Li2CO3, Pt | Li3PO4 | Pt, Li2TiO3-TiO2, O2, CO2 on the Al2O3 substrate by MEMS process. Experimental results indicate that the micro solid-electrolyte CO2 gas sensor has a relatively rapid speed of response. By discussions, we may find that the improved performance will be realized by optimizing the primary parameters of the sensor.

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Ji, Weiming, Zumei Zhu, Shunni Dong, Jingjing Nie, and Binyang Du. "Optical Detection of Fe3+ Ions in Aqueous Solution with High Selectivity and Sensitivity by Using Sulfasalazine Functionalized Microgels." Sensors 19, no. 19 (2019): 4223. http://dx.doi.org/10.3390/s19194223.

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A highly selective and sensitive optical sensor was developed to colorimetric detect trace Fe3+ ions in aqueous solution. The sensor was the sulfasalazine (SSZ) functionalized microgels (SSZ-MGs), which were fabricated via in-situ quaternization reaction. The obtained SSZ-MGs had hydrodynamic radius of about 259 ± 24 nm with uniform size distribution at 25 °C. The SSZ-MG aqueous suspensions can selectively and sensitively response to Fe3+ ions in aqueous solution at 25 °C and pH of 5.6, which can be quantified by UV-visible spectroscopy and also easily distinguished by the naked eye. Job’s plo

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Vasileva, Penka, Teodora Alexandrova, and Irina Karadjova. "Application of Starch-Stabilized Silver Nanoparticles as a Colorimetric Sensor for Mercury(II) in 0.005 mol/L Nitric Acid." Journal of Chemistry 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/6897960.

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A sensitive and selective Hg2+optical sensor has been developed based on the redox interaction of Hg2+with starch-coated silver nanoparticles (AgNPs) in the presence of 0.005 mol L−1HNO3. The relative intensity of the localized surface plasmon absorption band of AgNPs at 406 nm is linearly dependent on the concentration of Hg2+with positive slope for the concentration range 0–12.5 μg L−1and negative slope for the concentration range 25–500 μg L−1. Experiments performed demonstrated that metal ions (Na+, K+, Mg2+, Ca2+, Pb2+, Cu2+, Zn2+, Cd2+, Fe3+, Co2+, and Ni2+) do not interfere under the sa

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Kolbus, Anna, Tomasz Uchacz, Andrzej Danel, Katarzyna Gałczyńska, Paulina Moskwa, and Przemysław Kolek. "Fluorescent Sensor Based on 1H-Pyrazolo[3,4-b]quinoline Derivative for Detecting Zn2+ Cations." Molecules 29, no. 4 (2024): 823. http://dx.doi.org/10.3390/molecules29040823.

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The photophysical and sensory properties of the donor–acceptor pyrazoloquinoline derivative (PQPc) were investigated using absorption, steady-state, and time-resolved fluorescence measurements. The compound synthesized from commercial, readily available substrates exhibited absorptions in the UV–Vis range, with a maximum of the longwave band around 390 nm. The maximum fluorescence was around 460–480 nm, depending on the solvent. The quantum yield was between 12.87% (for n-hexane) and 0.75% (for acetonitrile) and decreased with increasing solvent polarity. The PET mechanism was implicated as th

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Putra, Hardian Setya Dharma, Resmana Lim, and Iwan Handoyo Putro. "Pemantauan Kualitas Udara Polutan CO dan CO2 Berbasis IoT." Jurnal Teknik Elektro 12, no. 1 (2020): 26–31. http://dx.doi.org/10.9744/jte.12.1.26-31.

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- Sebagian besar sistem pemantauan udara yang ada belum dapat terkoneksi melalui jaringan internet, oleh karenanya alat pemantau udara tersebut hanya dapat dipantau dan dikendalikan secara lokal. Dalam TA ini akan dibuat alat pemantau kualitas udara polutan CO dan CO2 berbasis IoT (Internet of Things). Dalam pembuatan alat pemantau polutan udara menggunakan sensor MQ-7 untuk mendeteksi gas CO dan menggunakan sensor MH-Z19 untuk memantau gas CO2. Perbedaan dengan alat-alat yang telah dibuat sebelumnya yang sebagian besar menggunakan sensor tipe TGS yaitu harga yang lebih murah. Dengan adanya al

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Astuti, Irnin Agustina Dwi, and Thoha Firdaus. "Analisis Kandungan CO2 Dengan Sensor dan Berbasis Logger Pro di Daerah Yogyakarta." JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) 1, no. 1 (2017): 5–8. http://dx.doi.org/10.30599/jipfri.v1i1.118.

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 Penelitian ini bertujuan untuk menganalisis kandungan CO2 di daerah Yogyakarta dengan menggunakan sensor CO2 dan logger pro. Kota Yogyakarta setiap tahunnya mengalami kepadatan penduduk yang menyebabkan pesatnya pemakaian kendaraan bermotor juga. Ini yang menyebabkan tingkat polusi udara di kota Yogyakarta juga semakin buruk akibat polusi kendaraan bermotor maupun industri. Kandungan CO2 yang seharusnya di atmosfer bumi sebesar 381 PPM. Dalam penelitian ini menganalisis kandungan CO2 di sepuluh tempat keramaian di Yogyakarta. Penelitian ini menggunakan sensor gas CO2 Vernier dan di anal

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Israelsson, Maria, Robert S. Siegel, Jared Young, Mimi Hashimoto, Koh Iba, and Julian I. Schroeder. "Guard cell ABA and CO2 signaling network updates and Ca2+ sensor priming hypothesis." Current Opinion in Plant Biology 9, no. 6 (2006): 654–63. http://dx.doi.org/10.1016/j.pbi.2006.09.006.

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SABANDO, BRAVO KENIA, Marlon Navia, and Jorge Luis Zambrano-Martinez. "Revisión de estudios sobre redes de sensores para el monitoreo de CO2." Serie Científica de la Universidad de las Ciencias Informáticas 16, no. 4 (2023): 24–41. https://doi.org/10.5281/zenodo.14916280.

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Actualmente en los centros urbanos, aumentan las cantidades de gases contaminantes, que ocasionan el crecimiento del calentamiento global. Uno de los principales gases causantes del efecto invernadero es el dióxido de carbono (CO2). Por esta razón, su monitoreo y control es un tema muy estudiado alrededor del mundo, debido a los diversos problemas en el ecosistema. Una de las formas de monitorear los niveles de CO2 en el ambiente, es a través del uso de dispositivos con sensores especializados y comunicados inalámbricamente mediante una red de sensores. El presente

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Lin, Yueyu, Dexter Manalili, Amir Khodabakhsh, and Simona M. Cristescu. "Real-Time Measurement of CH4 in Human Breath Using a Compact CH4/CO2 Sensor." Sensors 24, no. 4 (2024): 1077. http://dx.doi.org/10.3390/s24041077.

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The presence of an elevated amount of methane (CH4) in exhaled breath can be used as a non-invasive tool to monitor certain health conditions. A compact, inexpensive and transportable CH4 sensor is thus very interesting for this purpose. In addition, if the sensor is also able to simultaneously measure carbon dioxide (CO2), one can extract the end-tidal concentration of exhaled CH4. Here, we report on such a sensor based on a commercial detection module using tunable diode laser absorption spectroscopy. It was found that the measured CH4/CO2 values exhibit a strong interference with water vapo

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Liao, Wei-Ming, Mei-Juan Wei, Jun-Ting Mo, et al. "Acidity and Cd2+ fluorescent sensing and selective CO2 adsorption by a water-stable Eu-MOF." Dalton Transactions 48, no. 14 (2019): 4489–94. http://dx.doi.org/10.1039/c9dt00539k.

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A new luminescent Eu-MOF from an amino-group modified tetracarboxylic acid ligand was designed, which could perform as an efficient pH acidity and Cd<sup>2+</sup> PL sensor and CO<sub>2</sub> selector.

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Devi Septiyani, Bahtiar Wilantara, Ismail Kholid, and Sidik Purnomo. "Analysis of O2 Sensor Troubleshooting on Exhaust Gas Emissions and Fuel Consumption at Piksi Ganesha Indonesia Polytechnic." Jurnal E-Komtek (Elektro-Komputer-Teknik) 7, no. 2 (2023): 347–56. http://dx.doi.org/10.37339/e-komtek.v7i2.1547.

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This research aims to analyze O2 sensor troubleshooting on exhaust emissions and fuel consumption. The research method is comparative. Research steps by analyzing exhaust emissions and fuel consumption without an O2 sensor and with an O2 sensor at idle, 1000, 1500, and 2000 rpm. Research results: 1. comparison of exhaust emissions without O2 sensor and with O2 sensor, namely: idle rotation, CO = 7.41>3.33%, HC = 489 <497%, CO2 = 9.7 <12.5%, O2 = 13.44>0%, 1000 rpm, CO = 7.35>1.52%, HC = 686>538 ppm, CO2 = 9.7>11.8%, O2 = 10.91>2.20%, 1500 rpm, CO= 5.43>1.32%, HC= 666

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Ma, Ying, Kittithat Promthaveepong, and Nan Li. "CO2-Responsive Polymer-Functionalized Au Nanoparticles for CO2 Sensor." Analytical Chemistry 88, no. 16 (2016): 8289–93. http://dx.doi.org/10.1021/acs.analchem.6b02133.

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Cao, Zheng, Yuyuan Chen, Qianpeng Zhang, et al. "Preparation and ion sensing property of the self-assembled microgels by QCM." Nanofabrication 3, no. 1 (2017): 16–25. http://dx.doi.org/10.2478/nanofab-2017-0002.

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AbstractThe polyanion polystyrene sulfonate (PSS), the polycation poly (allylamine hydrochloride) (PAH), and the anionic poly (N-isopropylacrylamide-co-acrylic acid) [P(NIPAM-co-AA)] microgels were self-assembled onto the polyethylene imine (PEI) adsorbed gold surfaces of quartz crystal microbalance (QCM) because of the electrostatic attractions. The interactions of various metal particles including Ca2+, Bi3+, Cu2+, Zn2+, Ni2+, Sn2+, Co2+, and Cd2+with the obtained PEI/PSS/PAH/microgel layer in aqueous solutions were evaluated by QCM. The PEI/PSS/PAH/Microgel covered QCM sensor demonstrates t

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Hawchar, Amer, Solomon Ould, and Nick S. Bennett. "Carbon Dioxide Monitoring inside an Australian Brewery Using an Internet-of-Things Sensor Network." Sensors 22, no. 24 (2022): 9752. http://dx.doi.org/10.3390/s22249752.

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Maintaining a high standard of indoor air quality (IAQ) is vital to ensuring good human health. The concentration of CO2 in air is a good proxy for IAQ, while high levels of CO2 have been shown to cause cognitive or physiological impairment. Work environments that generate CO2 as an inherent part of their business present a unique and significant risk in terms of poor IAQ. Craft breweries generate CO2 and, unlike larger breweries, often lack the technology to capture and re-use the fermentation CO2 for beer carbonation. The purpose of this study is to demonstrate that the venting of fermentati

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Benton, Erin, Nawagamu Perera, Vladimir Nesterov, Wijayantha Perera, Mohammad Omary, and Sreekar Marpu. "A Europium-Based Optical Sensor for the Detection of Carbon Dioxide and Its Application for a Fermentation Reaction." Chemosensors 11, no. 1 (2022): 5. http://dx.doi.org/10.3390/chemosensors11010005.

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A new europium-based complex, K[Eu(hfa)4] with hfa = hexafluoroacetylacetonate is synthesized and its structure confirmed via X-ray crystallography. The structure unravels an anionic octa-coordinate complex, K[Eu(hfa)4], as opposed to the neutral hexacoordinate complex Eu(hfa)3 routinely/ubiquitously presumed to be the case in the literature. The complex displayed pH-dependent, “on–off” emission changes in solution and exhibited a pKa of 6.13 ± 0.06 in ethylene glycol. In solution, the sensor complex exhibited drastic variation in emission intensity corresponding to changes in the concentratio

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Roxana Varlan, Anca, and Willy Sansen. "Micromachined conductometric p(CO2) sensor." Sensors and Actuators B: Chemical 44, no. 1-3 (1997): 309–15. http://dx.doi.org/10.1016/s0925-4005(97)00223-2.

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Wen, Chang Bao, Yong Feng Ju, Wan Lin Li, et al. "Carbon Dioxide Gas Sensor Using SAW Device Based on ZnO Film." Applied Mechanics and Materials 135-136 (October 2011): 347–52. http://dx.doi.org/10.4028/www.scientific.net/amm.135-136.347.

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Carbon dioxide (CO2) gas sensor using surface acoustic wave (SAW) device based on Zinc oxide (ZnO) was developed and fabricated in this paper. The center frequency of SAW device is 203.528 MHz. The input and two output interdigital transducers (IDT) apodized by Morlet wavelet function can improve the side lobe rejection compared with uniform IDT. The ZnO film sensitive to CO2 gas was fabricated in measurement acoustic track of SAW device. Experiments results confirm that the CO2 gas sensor using SAW device based on ZnO film has good response characteristics to different concentrations CO2 gas.

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Zhang, Wenchao, Nie Zhao, Yongrong Liu, and Bo Li. "Interconnected CeO2 Nanofibers for Enhanced CO Gas Sensing." Journal of Sensors 2022 (February 21, 2022): 1–7. http://dx.doi.org/10.1155/2022/3097440.

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Developing a new type of CO gas sensor with high response, good reproducibility, and short response/recovery time is of great significance in medical fields, especially during anesthesia. During mechanical ventilation, CO gas will be produced by CO2 absorbent. Herein, novel interconnected CeO2 nanofibers with an average diameter of 150 nm are firstly prepared by electrospinning. The results show that the received nanofibers are mainly composed of fluorite-structured CeO2 crystals with oxygen vacancies as well as the adsorbed oxygen species on the fiber surface. It is found that there is no agg

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Munz, Hannah, Joachim Ingwersen, and Thilo Streck. "On-Site Sensor Calibration Procedure for Quality Assurance of Barometric Process Separation (BaPS) Measurements." Sensors 23, no. 10 (2023): 4615. http://dx.doi.org/10.3390/s23104615.

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Barometric process separation (BaPS) is an automated laboratory system for the simultaneous measurement of microbial respiration and gross nitrification rates in soil samples. To ensure optimal functioning, the sensor system, consisting of a pressure sensor, an O2 sensor, a CO2 concentration sensor, and two temperature probes, must be accurately calibrated. For the regular on-site quality control of the sensors, we developed easy, inexpensive, and flexible calibration procedures. The pressure sensor was calibrated by means of a differential manometer. The O2 and CO2 sensors were simultaneously

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Hsu, Hsiang-Chang, Tso-Sheng Hsieh, Tzu-Hsuan Huang, Liren Tsai, and Chia-Chin Chiang. "Double Notched Long-Period Fiber Grating Characterization for CO2 Gas Sensing Applications †." Sensors 18, no. 10 (2018): 3206. http://dx.doi.org/10.3390/s18103206.

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In this study, we applied a double-sided inductively coupled plasma (ICP) process to nanostructure long-period fiber grating (LPFG) in order to fabricate a double-notched LPFG (DNLPFG) sensor with a double-sided surface corrugated periodic grating. Using the sol-gel method, we also added thymol blue and ZnO to form a gas sensing layer, thus producing a DNLPFG CO2 gas sensor. The resulting sensor is the first double-sided etching sensor used to measure CO2. The experimental results showed that as the CO2 concentration increased, the transmission loss increased, and that the smaller the fiber di

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Wang, Guangwei, Hongzhen Chen, and Yuanhui Wu. "Influence of Heat Disturbance on the Performance of YSZ based CO2 Sensor with Compound of Li2CO3-BaCO3-Nd2O3 as Auxiliary Sensing Electrode." Journal of New Materials for Electrochemical Systems 23, no. 4 (2020): 244–51. http://dx.doi.org/10.14447/jnmes.v23i4.a04.

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Suddenly changes and fluctuations of temperature often occur in the operational environment of the CO2 electrochemical sensor. In this work, the YSZ based potentiometric CO2 sensor having Li2CO3-BaCO3-Nd2O3 compound as its auxiliary sensing material was prepared. And the effects of several types of heat disturbance on the performance of this kind of sensor ware studied. The results indicate that the sensors after heat disturbances respond similarly with the sensor as prepared, which presents rapid and correct response for the change of CO2 concentration within the experimental range of 271-576

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Naufaldi, Daffa Ahsan, Arum Kusuma Wardhany, and Bagas Abiyu Putra. "Sistem Monitoring Kadar CO2 Underground Pit Stamping Shop Berbasis Internet Of Things." ELECTRICES 4, no. 2 (2022): 73–78. http://dx.doi.org/10.32722/ees.v4i2.5365.

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Perancangan sistem ini dilakukan untuk mengembangkan sistem monitoring CO2 di udara berbasis Internet of Things (IoT). Dalam penelitian ini digunakan alat untuk mengukur kadar CO2 dengan menggunakan Raspberry Pi sebagai kontroler dan sensor CCS811 untuk mengukur eCO2 (equivalent calculated Carbon Dioxide) concentration dan TVOC (Total Volatile Organic Compounds). Pengukuran tersebut dilakukan dengan tujuan untuk mengetahui tingkat bahaya yang berada pada area underground pit dengan mengetahui kadar nilai CO2 pada area tersebut. Nilai yang terbaca oleh sensor selanjutnya akan dikirim melalui ja

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Vivek, Panghal. "GAS DETECTION USING SOLID-STATE ELECTRONIC SENSORS FOR CARBON DIOXIDE." International Journal of Applied and Advanced Scientific Research (IJAASR) 8, no. 1 (2023): 6–9. https://doi.org/10.5281/zenodo.7663073.

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Carbon dioxide (CO2) detection is crucial for uses in environmental protection, human health, and security, and even in outer space. Our group has investigated a new chemiresistive sensor for CO2 detection using a nanocomposite of multiwall carbon nanotubes (MWCNTs) and iron oxide (Fe2O3). Sensors have been shrunk down to the size of a chip (1 cm 2 cm). As a result of the broad range of CO2 concentrations within which the sensor performed well, it was concluded that the sensor had good sensing performance (100–6000 ppm). The sensing materials' structural characteristics were studied

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Simanjuntak, Manna Septriani, Rispandi, and Cheng-Shane Chu. "Advanced Optimization of Optical Carbon Dioxide Sensor Through Sensitivity Enhancement in Anodic Aluminum Oxide Substrate." Polymers 17, no. 11 (2025): 1460. https://doi.org/10.3390/polym17111460.

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The current research developed an optical carbon dioxide (CO2) sensor using anodized aluminum oxide (AAO) as the substrate. We developed an optical carbon dioxide (CO2) sensor utilizing CdSe/ZnS quantum dots (QDs) as the fluorescent dye and Phenol Red as the pH indicator. The QDs acted as the CO2-responsive fluorophore and were embedded in a polyimide butyl methacrylate (polyIBM) matrix. This sensing solution was applied to an anodized aluminum oxide (AAO) substrate, which provided a porous and stable platform for sensor fabrication. Photoluminescence measurements were conducted using the coat

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