scholarly journals Investigation of the process of moisture loss during refrigerated storage of fish

2021 ◽  
Vol 937 (2) ◽  
pp. 022094
Author(s):  
Evgeniy Neverov ◽  
Igor Korotkiy ◽  
Elena Korotkaya ◽  
Olga Neverova ◽  
Larisa Proskuryakova
Keyword(s):  
Carbon Dioxide ◽  
Hydration Shell ◽  
Moisture Loss ◽  
Technical Solution ◽  
Smoked Fish ◽  
Carbon Dioxide Gas ◽  
Subcutaneous Layer ◽  
Carbon Dioxide Co2 ◽  
Water Holding ◽  
Fish Trade

Abstract The purpose of current work is to study the effect of carbon dioxide on the shrinkage of smoked fish and to develop a technical solution for the implementation of technology with the use of CO2 in fish trade. We use mackerel, flounder and crucian carp as test samples. The studies were carried out in two versions: storage of fish in a chamber under traditional conditions and with the addition of carbon dioxide (CO2) to the refrigerating chamber. The use of carbon dioxide gas during the storage of smoked fish leads to an increase in the water-holding capacity of the fish in comparison with the traditional storage method. In our proposed method of storage in a cold atmosphere with CO2, fish shrinkage is reduced. The carbonate ions well bind water molecules in the hydration shell due to positive hydration, which slows down the processes of hydrolysis and oxidation of lipids inside the subcutaneous layer and preserves the moisture-retaining capacity of tissues. Thus, the use of carbon dioxide in the storage of smoked fish reduces weight loss and does not affect the appearance of the fish.

Design, Modeling and Simulation of CMOS-MEMS Piezoresistive Cantilever Based Carbon Dioxide Gas Sensor for Capnometry

2011 ◽  
Vol 403-408 ◽  
pp. 3769-3774 ◽  
Author(s):  
Asif Mirza ◽  
Nor Hisham Hamid ◽  
Mohd Haris Md Khir ◽  
Khalid Ashraf ◽  
M.T. Jan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Modeling And Simulation ◽  
Low Cost ◽  
Cmos Technology ◽  
Simulation Software ◽  
Dynamic Mode ◽  
Fully Differential ◽  
Carbon Dioxide Gas ◽  
Carbon Dioxide Co2 ◽  
Relative Change

This paper reports design, modeling and simulation of MEMS based sensor working in dynamic mode with fully differential piezoresistive sensing for monitoring the concentration of exhaled carbon dioxide (CO2) gas in human breath called capnometer. CO2 being a very important biomarker, it is desirable to extend the scope of its monitoring beyond clinical use to home and ambulatory services. Currently the scope of capnometers and its adaption is limited by high cost, large size and high power consumption of conventional capnometers . In recent years, MEMS based micro resonant sensors have received considerable attention due to their potential as a platform for the development of many novel physical, chemical, and biological sensors with small size, low cost and low power requirements. The sensor is designed using 0.35 micron CMOS technology. CoventorWare and MATLAB have been used as simulation software. According to the developed model and simulation results the resonator has resonant frequency 57393 Hz and mass sensitivity of 3.2 Hz/ng. The results show that the longitudinal relative change of resistance is 0.24%/µm while the transverse relative change of resistance is -0.03%/µm.

Carbon Dioxide Gas Sensor Using SAW Device Based on ZnO Film

2011 ◽  
Vol 135-136 ◽  
pp. 347-352 ◽  
Author(s):  
Chang Bao Wen ◽  
Yong Feng Ju ◽  
Wan Lin Li ◽  
Wen Zheng Sun ◽  
Xin Xu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gas Sensor ◽  
Side Lobe ◽  
Center Frequency ◽  
Zno Film ◽  
Co2 Gas ◽  
Response Characteristics ◽  
Carbon Dioxide Gas ◽  
Co2 Gas Sensor ◽  
Carbon Dioxide Co2

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. Furthermore, the CO2 gas sensor using SAW device based on ZnO film has good stability and linearity.

scholarly journals MAKING LEARNING MEDIA FOR GREENBOX EFFECT SIMULATOR TO IMPROVE UNDERSTANDING OF THE CONCEPT OF THE GREENHOUSE EFFECT

2021 ◽  
Vol 5 (1) ◽  
pp. 11-16
Author(s):  
Noer Sarifah Ainy ◽  
Nestiyanto Hadi
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Greenhouse Gases ◽  
Air Temperature ◽  
Greenhouse Effect ◽  
Independent Variables ◽  
Carbon Dioxide Gas ◽  
The Earth ◽  
Yellow Color ◽  
Carbon Dioxide Co2

The earth is experiencing global warming due to an increase in air temperature (greenhouse effect). This is due to the large number of greenhouse gases produced by human activities. In addition, it is also due to the reduced number of plants that absorb greenhouse gases, especially carbon dioxide. This condition causes the study of the greenhouse effect to become an object studied by students at school. Understanding the greenhouse effect is somewhat difficult if only understood in theory. Increasing understanding can be done by making practicum learning media. This study aims to create learning media for the Greenbox Effect Simulator to help understand the concept of the greenhouse effect. The research was conducted using control variables and independent variables (use of plants and without plants). The plants used are Caisim, Sri Gading and Anggrek. The presence of carbon dioxide (CO2) greenhouse gases can be detected by three things, namely changes in the color of the CO2 indicator, changes in temperature, and visibility of the box. The color of the CO2 indicator shows green and green yellow for Box B (with plants) which means the concentration of CO2 in normal conditions. Whereas Box C (without plants) gives a yellow color, which means that the concentration of CO2 is at high conditions. The presence of carbon dioxide gas from combustion will increase the temperature by 1.4 - 1.9 oC in Box C (without plants) and 0.7 - 1.5 oC in Box B (use of plants). The visibility of Box B shows a higher brightness level than Box C. The best plants that can absorb CO2 concentrations are orchids. The ability of orchids to absorb CO2 is assisted by their roots which also function to carry out photosynthesis. The existence of plants functions to absorb CO2 quite well when viewed from changes in temperature, color indicators and visibility.

Carbon Dioxide Sequestered Concrete

2020 ◽  
Vol 12 (9) ◽  
Author(s):  
Nur Liyana Mohd Kamal ◽  
◽  
Zarina Itam ◽  
Yuovendra Sivaganese ◽  
Norizham Abdul Razak ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Construction Industry ◽  
Carbon Footprint ◽  
Human Beings ◽  
Greenhouse Gasses ◽  
Carbon Dioxide Gas ◽  
Compressive Strength Of Concrete ◽  
Mineral Trapping ◽  
Carbon Dioxide Co2 ◽  
The Impact

Carbon dioxide, CO2 accounts for most of the emission from all the types of greenhouse gasses in the world. The ability of CO2 to remain longer than other greenhouse gases and the convenience of producing CO2 has resulted in its high projection in a yearly manner. The prime factor for the emission of CO2 are from the actions of human beings. One such human act is the concrete industry. Total emissions from the concrete industry could therefore contribute as much as 8% of global CO2 emissions. Sequestered CO2 in concrete can provide an impact on reducing the carbon footprint and is also able to improve the compressive strength of concrete. During this process, the sequestered carbon dioxide chemically reacts with cement to produce a mineral, trapping carbon dioxide gas in the concrete. Hence, sequestering carbon dioxide gas in concrete does not only on a bigger scale reduces carbon footprint, but it also reduces the impact the construction industry has on the environment. This paper presents a detailed review on the chemical reaction that takes place during the sequestration of carbon dioxide and the research published on the effects of carbon dioxide sequestered concrete on its properties. The impact this process has on the concrete industry and the environment is discussed in this paper.

scholarly journals Fabrication and Testing of Polymeric Membranes for Energy-Efficient Separation of Carbon Dioxide from Flue Gas

2020 ◽  
Author(s):  
Sara Elhoshee ◽  
Fatima Taqi ◽  
Amna Alabdullah ◽  
Mohamed Hassan ◽  
Azza Abouhashem
Keyword(s):  
Carbon Dioxide ◽  
Water Vapor ◽  
Carbon Capture ◽  
Membrane Separation ◽  
Carbon Capture And Storage ◽  
Polymeric Membranes ◽  
Carbon Dioxide Gas ◽  
Carbon Dioxide Co2 ◽  
Reduction Of Co2 ◽  
Cryogenic Distillation

One of the major problems the world is facing nowadays is Global Warming. The main ten Green House Gases (GHGs) include water vapor (H2O), carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). The most abundant and dominant greenhouse gas is water vapor but concentration of water vapor depends on temperature and other meteorological conditions, and not directly upon human activities. CO2 is the second-most important one and that is why reduction of CO2 emissions is a vital area of research. Carbon capture and storage (CCS) is a major strategy that can be used to reduce GHGs emission. CCS divides into three methods: pre-combustion capture, oxy-fuel process, and post-combustion capture. Among them, post-combustion capture is the most important one because it offers flexibility and it can be easily added to the operational units. For CO2 capture, various technologies are used which include: absorption, adsorption, cryogenic distillation, and membrane separation. Our research focuses on one of the technologies for post-combustion capture, which is membrane separation. In this research, we fabricated four samples of polymeric membranes with different proportions of the components and then tested them for thermal stability, tensile strength, selectivity and permeability. The membrane can be modified by trying different mixtures of the forming polymers with different percentages. The separated carbon dioxide gas can be used in different applications like fire extinguishers, carbonated beverages or cooling systems. For the future recommendations finding more applications for the use of the separated carbon dioxide gas will benefit the environment and will make this project more successful. The same techniques could be used to fabricate membranes for purifying the methane gas. Further studies must be done to ensure the effectiveness of these membranes when used in the industry.

scholarly journals Carbon Dioxide Sequestered Concrete: A Review Paper

2020 ◽  
Author(s):  
Nur Liyana Mohd Kamal ◽  
Zarina Itam ◽  
Yuovendra Sivaganese ◽  
Norizham Abdul Razak
Keyword(s):  
Carbon Dioxide ◽  
Construction Industry ◽  
Carbon Footprint ◽  
Human Beings ◽  
Greenhouse Gasses ◽  
Carbon Dioxide Gas ◽  
Compressive Strength Of Concrete ◽  
Mineral Trapping ◽  
Carbon Dioxide Co2 ◽  
The Impact

Carbon dioxide, CO2 accounts for most of the emission from all the types of greenhouse gasses in the world. The ability of CO2 to remain longer than other greenhouse gases and the convenience of producing CO2 has resulted in its high projection in a yearly manner. The prime factor for the emission of CO2 are from the actions of human beings. One such human act is the concrete industry. Total emissions from the concrete industry could therefore contribute as much as 8% of global CO2 emissions. Sequestered CO2 in concrete can provide an impact on reducing the carbon footprint and is also able to improve the compressive strength of concrete. During this process, the sequestered carbon dioxide chemically reacts with cement to produce a mineral, trapping carbon dioxide gas in the concrete. Hence, sequestering carbon dioxide gas in concrete does not only on a bigger scale reduces carbon footprint, but it also reduces the impact the construction industry has on the environment. This paper presents a detailed review on the chemical reaction that takes place during the sequestration of carbon dioxide and the research published on the effects of carbon dioxide sequestered concrete on its properties. The impact this process has on the concrete industry and the environment is discussed in this paper.

PIV Measurement of Carbon Dioxide Gas-Liquid Two-Phase Nozzle Flow

2015 ◽  
Author(s):  
Satoshi Ueno ◽  
Wakana Tsuru ◽  
Yoichi Kinoue ◽  
Norimasa Shiomi ◽  
Toshiaki Setoguchi
Keyword(s):  
Carbon Dioxide ◽  
High Speed ◽  
Two Phase Flow ◽  
Nozzle Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Acceleration ◽  
Carbon Dioxide Gas ◽  
Piv Measurement ◽  
Carbon Dioxide Co2

As a refrigerant used for a refrigeration cycle, carbon dioxide (CO2) is regarded. In the case that CO2 is used as a refrigerant, a gas-liquid two-phase flow ejector is very important. The gas-liquid two-phase flow ejector consists of a driving flow nozzle, a suction chamber, a mixing section and a diffuser. It is important for optimally designing the driving flow nozzle of the two-phase flow ejector to make clear the acceleration characteristics of the high speed gas-liquid two-phase flow. However, there is only a few study examples to evaluate the acceleration performance reasonably. Therefore, the purpose of this study is to measure the acceleration characteristics and temperature distribution in the CO2 gas-liquid two-phase flow nozzle of the CO2 two-phase flow ejector by experiment. In the experiment, CO2 is blown down through the convergent-divergent nozzle and is discharged into the atmosphere. Visualization of the nozzle flow has been carried out by Particle Image Velocimetry (PIV). Temperature measurement has been carried out by thermocouples. Obtained velocity distribution of gas-liquid two-phase flow nozzle have been considered as the droplets velocity. By the experiment, these velocity distributions in parts of the nozzle and these temperature distributions in the nozzle are obtained. Therefore, the flow acceleration in the nozzle divergent part is clarified by the experimental work.

Prediction and Validation of Carbon Dioxide Gas Solubility in Ionic Liquids at T=298K and Atmospheric Pressure using Quantum Chemical Approach

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
Anantharaj Ramalingam ◽  
Tamal Banerjee
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquids ◽  
Quantum Chemical ◽  
Ring Structure ◽  
Gas Solubility ◽  
Absolute Deviation ◽  
Carbon Dioxide Gas ◽  
Infinite Dilution Activity Coefficient ◽  
Gas Solubilities ◽  
Carbon Dioxide Co2

Carbon dioxide (CO2) gas solubilities are predicted via quantum chemical calculations, which only requires molecular structure as initial information. The quantum chemical based Conductor like Screening Model for Real Solvents (COSMO-RS) has been adopted for this purpose. Predictions of gas solubility at temperatures ranging from (283.15 to 323.15 K) at 0.1 MPa were done for the IL:[EMIM][TFI]. The relative absolute deviation of around 30% shows that the quality of predictions is highly dependent on the infinite dilution activity coefficient of CO2 in [EMIM][TFI].Additionally thermodynamic parameters such as Gibb’s Energy of solvation, enthalpies and entropies have also been predicted and compared for the IL:[BMIM][BF4]. In addition, the carbon dioxide solubility in 16 ionic liquids comprising of imidazolium and pyridinium based cations was validated with reported values. The Root Mean Square Deviation (RMSD) obtained was: 3.09% [TFI], 6.5% [TFO] and 12% [PF6], respectively. Finally, the Henry’s constants of CO2 in 286 ionic liquids comprising of newer cations such as pyrrolidinium, piperidinium and morpholium were predicted at T=298.15 K. The saturated aromatic ring structure of pyrrolidinium, morpholinium and piperidinium based ionic liquids possessed low Henry’s constant values which indicates high solubility of CO2 in ionic liquids.

scholarly journals PERAN RESPIRATOR DALAM PENCEGAHAN DAMPAK KESEHATAN AKIBAT POLUSI UDARA (STUDI KASUS DESA KLARI)

2021 ◽  
Vol 5 (1) ◽  
pp. 539
Author(s):  
Vita Efelina ◽  
Najmudin Fauji ◽  
Iqbal Maulana ◽  
Eri Widianto ◽  
Sarah Dampang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Air Pollution ◽  
Public Awareness ◽  
Gas Absorption ◽  
Health Impacts ◽  
Carbon Dioxide Gas ◽  
Carbon Dioxide Co2 ◽  
Motorized Vehicles ◽  
The Impact

ABSTRAKPeran Respirator Dalam Pencegahan Dampak Kesehatan Akibat Polusi Udara Di Desa Klari, Kecamatan Klari, Kabupaten Karawang. Kegiatan ini di latar belakangi Desa Klari yang memerlukan perhatian terhadap peran respirator akibat dampak dari polusi udara. Selain itu, diharapkan dengan adanya Kegiatan Kuliah Kerja Nyata (KKN) ini dapat membantu masyarakat dalam meningkatkan kesadaran masyarakat akan pentingnya dampak polusi udara bagi Kesehatan di Desa Klari Kecamatan Klari. Hal ini dilakukan dengan cara menanyakan serta membagikan kuisioner ke masyarakat Desa Klari dengan adanya peran respirator bagi dampak Kesehatan akibat polusi udara. Dengan tingkat kesadaran masyarakat yang masih minim terhadap pentingnya peran respirator terhadap Kesehatan akibat polusi udara. Hal ini didasari dengan kondisi polusi udara di Desa Klari yang terbilang tidak terlalu baik akibat adanya polusi dari banyaknya kendaraan bermotor, asap pabrik, dan kegiatan pembakaran yang sembarangan. Dengan adanya kegiatan KKN di Desa Klari diharapkan tidak hanya dalam peningkatan peran respirator bagi masyarakat Klari tapi dihimbau bagaimana cara menanggulangi polusi udara dengan cara menanam pohon yang mengandung daya serap gas karbondioksida (CO2) dan pembuatan tong sampah guna mengurangi tingkat volume sampah di lingkungan Desa Klari. Kata Kunci: respirator; polusi; karbondioksida (CO2); desa klari; volume. ABSTRACTThe Role of Respirators in Preventing Health Impacts Due to Air Pollution in Klari Village, Klari District, Karawang Regency. This activity is in the background of Klari Village which requires attention to the role of respirators due to the impact of air pollution. In addition, it is hoped that this Real Work Lecture (KKN) activity can help the community in increasing public awareness of the importance of the impact of air pollution on health in Klari Village, Klari District.This is done by asking and distributing questionnaires to the Klari Village community with the role of respirators for health impacts due to air pollution. With the level of public awareness that is still minimal on the importance of the role of respirators on health due to air pollution. This is based on the condition of air pollution in Klari Village which is not very good due to pollution from many motorized vehicles, factory smoke, and indiscriminate burning activities.With the KKN activities in Klari Village, it is expected not only to increase the role of respirators for the Klari community but are also encouraged to overcome air pollution by planting trees that contain carbon dioxide gas absorption (CO2) and making trash cans to reduce the level of waste volume in the Klari Village environment. . Keywords: respirators; pollution; carbon dioxide (CO2); klari village; volume 

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