scholarly journals Alteration of sensitivity and time scale in invertebrate photoreceptors exposed to anoxia, dinitrophenol, and carbon dioxide.

1978 ◽  
Vol 72 (2) ◽  
pp. 219-231 ◽  
Author(s):  
R C Lantz ◽  
A Mauro
Keyword(s):  
Carbon Dioxide ◽  
Time Scale ◽  
Receptor Potential ◽  
Metabolic Inhibition ◽  
Free Calcium ◽  
Time To Peak ◽  
Late Receptor Potential ◽  
Carbon Dioxide Co2 ◽  
Retinular Cells

The effects of anoxia, 2,4-dinitrophenol (DNP), and carbon dioxide (CO2) on the late receptor potential of Balanus lateral ocelli, Limulus ventral eyes, and the retinular cells of Linulus lateral eyes have been studied. Either anoxia, DNP, or exposure to 100% CO2 causes a depolarization of 5-30 mV and a gradual reduction and eventually abolition of the late receptor potential and an increase in the latency and time to peak of the response. This lengthening of the time scale is in contrast to the response obtained in photoreceptors that have been light-adapted or injected with calcium. In that case a loss in sensitivity is associated with a decrease in latency and time to peak. Because of these observed differences, the effects of metabolic inhibition cannot be attributed merely to a loss in regulation of intracellular free calcium. Rather, because alteration of intracellular pH (pHi) by using either (NH4)2SO4 or CO2 produced changes in the photoresponse similar to those caused by metabolic inhibition, it is suggested that changes in pHi during metabolic inhibition can account in part for the lengthening of the time scale. In addition to the changes in pHi and internal Ca++ concentration due to metabolic inhibition, the possible role of other consequences of metabolism in the transduction mechanism is also discussed.

Protective role of carbon dioxide (CO2) in generation of reactive oxygen species

2015 ◽  
Vol 411 (1-2) ◽  
pp. 317-330 ◽  
Author(s):  
Sergey Bolevich ◽  
Alekandr Haritonovic Kogan ◽  
Vladimir Zivkovic ◽  
Dusan Djuric ◽  
Aleksey Aleksejevic Novikov ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Reactive Oxygen Species ◽  
Reactive Oxygen ◽  
Protective Role ◽  
Oxygen Species ◽  
Carbon Dioxide Co2

Role of Polymer-Based Nanofluids on Asphaltene Adsorption during Carbon Dioxide (CO2) Injection

2021 ◽  
Vol 35 (18) ◽  
pp. 14746-14757
Author(s):  
Ronald Nguele ◽  
Hikaru Hirota ◽  
Yuichi Sugai ◽  
Kyuro Sasaki
Keyword(s):  
Carbon Dioxide ◽  
Co2 Injection ◽  
Carbon Dioxide Co2

The Role of Site Coordination on the CO2 Electro-reduction Pathway on Stepped and Defected Copper Surfaces

2021 ◽  
Author(s):  
Lucas Garcia Verga ◽  
Paulo C. D. Mendes ◽  
Vivianne K. Ocampo-Restrepo ◽  
Juarez L. F. Da Silva
Keyword(s):  
Carbon Dioxide ◽  
Metal Catalysts ◽  
Copper Surfaces ◽  
Reduce Carbon Dioxide ◽  
Carbon Dioxide Co2

Copper (Cu) electrocatalysts are known as the only single-metal catalysts able to reduce carbon dioxide CO2 further than products such as CO and HCOOH with considerable efficiency. However, the product...

Role of carbon dioxide (CO2) to prepare syngas for sustainable development

2020 ◽  
Author(s):  
Mohammad Nizamuddin Inamdar ◽  
Rohan Senanayake ◽  
Badruddin Bin Nordin
Keyword(s):  
Carbon Dioxide ◽  
Sustainable Development ◽  
Carbon Dioxide Co2

scholarly journals Rumen CO2 species equilibrium might influence performance and be a factor in the pathogenesis of subacute ruminal acidosis

2019 ◽  
Vol 3 (4) ◽  
pp. 1081-1098
Author(s):  
José A Laporte-Uribe
Keyword(s):  
Carbon Dioxide ◽  
Surface Tension ◽  
Rumen Fluid ◽  
Neutral Detergent Fiber ◽  
Subacute Ruminal Acidosis ◽  
Ruminal Acidosis ◽  
Rumen Ph ◽  
Carbon Dioxide Co2 ◽  
Dietary Treatments

Abstract This experiment was conducted to explore rumen carbon dioxide (CO2) species equilibrium. Three lactating, fistulated cattle were consecutively exposed to three dietary treatments tailored to produce low rumen pH and increase the risk of subacute ruminal acidosis (SARA) by reducing physically effective neutral detergent fiber (Low peNDF), increasing rumen degradable starch (High RDS) or both (Combined). Under these conditions, high and varied rumen concentrations of the CO2 associated to water or dissolved CO2 (dCO2) were found. The results suggest that the activity of dCO2 and bicarbonate (HCO3−) represents an important component of the rumen environment. Rumen CO2 holdup was associated with high dCO2 and HCO3− activity as well as changes in the viscosity and surface tension of the rumen fluid. All dietary treatments produced low rumen pH, <5.5 for >3 h/d, a condition associated with SARA, but clinical SARA was observed only during CO2 holdup. This pilot study highlights the possible role of CO2 holdup and rumen CO2 species in cattle performance and nutritional diseases. In the future, better estimations of CO2 species might help clarify these findings.

scholarly journals The role of surface oxidation and Fe-Ni synergy in Fe-Ni-S catalysts for CO2 hydrogenation

2021 ◽  
Author(s):  
Claire Mitchell ◽  
David Santos-Carballal ◽  
Andrew Michael Beale ◽  
Wilm Jones ◽  
David John Morgan ◽  
...  
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Co2 Emissions ◽  
Surface Oxidation ◽  
Co2 Hydrogenation ◽  
Carbon Dioxide Co2

Increasing carbon dioxide (CO2) emissions, resulting in climate change, have driven the motivation to achieve the effective and sustainable conversion of CO2 into useful chemicals and fuels. Taking inspiration from...

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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