Questions related to Carbon Dioxide
- BJH Adsorption cumulative volume of pores between 2.0000 nm and 300.0000 nm diameter: 0.067637 cm³/g
- BJH Desorption cumulative volume of pores between 2.0000 nm and 300.0000 nm diameter: 0.113131 cm³/g
From the above data, which data should be added to the manuscript?
I am working on CO2 reduction by photocatalytic approach. The product is methanol, and the calculated methanol production rate is in terms of umol/g.h. I want to know how much CO2 converts to form the desired amount of methanol.
Actually CO2 reduction is target. So , I want to know that while doing the CV and lsv should there be purging of CO2 or before the experiment starts we should make the solution saturated with CO2? or we should do the CV in continuous purging of CO2. And if purging is necessary do we need to purge the solution before each scan at different scan rate ? Also i read that working electrode need to be activated so how to activate the working electrode and at what potential range and scan rate . Please also solve my query for the initial scan polarity ( what is its significance, does it affect the result )
i might have a dumb question... my fish cells keep detaching and dying after a few days of culture so no i am trying to find a solution to this problem.
They grow at 19°C without CO2. I only have experience with mammalian cells. I bought a new incubator, which has no extra water tank. Now my question is: Do i need to place a tray or something in the incubator, even if the cells grow at low temperature? Might this be the reason they keep dying?
How do forests maintain environmental balance and how do forests maintain the balance of oxygen and carbon dioxide in nature?
How the balance of gases maintained in the atmosphere and what is keeps atmospheric oxygen and carbon dioxide at stable levels?
I have used the standard MKHS composition to make this buffer. The initial pH of the solution was 7.7. I adjusted the pH to 7.3 with 1N HCL and bubbled with carbogen (95% O2 and 5% CO2) for 30 minutes. Later the pH changed to 7.8. If I prolong the carbogen bubbling the pH goes beyond 8.0. We checked the percentage of CO2 in the gas mixture it is 4.98%. But in the solution after gassing the pCO2 goes down, compared to the ungassed MKHS. Where could be the potential problem lies?
Could anyone help to solve this problem?
How does carbon exchange between organisms and the environment and carbon dioxide in the atmosphere significant to maintaining the health of an ecosystem?
Is oxygen gas chemically reactive and burning a chemical reaction in which a substance reacts with oxygen to form water and carbon dioxide?
What is carbon transferred as in an ecosystem and role of forest in maintaining the balance between oxygen and carbon dioxide in the atmosphere?
For example, it is well known that the viscosity of the fluid changes, but does it change in the same relationship if CO2 is miscible or if it is immiscible? Or maybe there are properties that are more affected in a case such as solubility, capillary pressure, and relative permeability?
Can you briefly calculate carbon dioxide or greenhouse gas emissions from heating loads?
Example: 10 kwh/㎡·a * CO2 emission coefficient (kg/kwh) = ⅹ(kg/kwh·a)
I'm simulating the CO2 adsorption on two graphite sheets using the LAMMPS software and I calculated the density profiles in the pore width. Now I would like to compare the results with some experimental values. In the laboratory I obtained the quantities adsorbed as mmol/grams of adsorbent.
Do any of you know how to calculate the same quantities starting from the density profile of LAMMPS?
Thank you in advance,
Is it only me, or others feel too that green technologies, in fact, lead to a dramatic increase in pollution (in general, not only CO2 or other favorite "polutant of the day")? If someone tells you: this car just got 20% cheaper, you would normally ask: "How much does it cost now?" But, if someone tells you: "This (overly expensive!) bag made of recycled paper is better than a plastic bag, I command you to use that from now on!" or "Electric cars are good for you and for the planet you must buy them (or we will outlaw any other cars)", "Sorting (stinky) trash at home will slow down melting of polar ice caps, stop climate changes and help cute and helples penguins", most people would just believe it, without giving it a second thought. Besides, who ever offered ANY proof of any such claims? So they obviously need not to be proven, right?
Please, in this discussion, do bring proofs for, or critically question, on widely claimed statements about the topics listed in the title.
The CO2 desorption in MOFs is performed by heating or applying low pressure(vacuum). It is observed that by incorporating MOFs in polymeric membranes, the CO2 selectivity increases in general. My question is that how desorption of CO2 occurs in continues permeation process? each time when MOF-based membrane is used at displays higher CO2 selectivity. so, why the MOfs saturated with CO2 do not show reduced selectivity in MOF-based membranes in continues permeation process?
I would like to conduct the economic analysis of the utilization of Xanthan Gum in ground improvement. If anyone can provide the statistics about CO2 generation during the production of Xanthan Gum, it will be very helpful.
How is the amount of organic carbon contained within a material that will readily decay and transform to either methane or carbon dioxide is calculated by means of Proximate analysis or any simple analysis in laboratory?
Any paper or relevant resource recommendations?
My laboratory lacks a CO2 incubator, and I'm working with cyanobacteria. Are there any suggestions for introducing CO2? Furthermore, how can I ensure the precise 3% CO2 concentration?
Which property of water changes during its evaporation and transformation takes place when dry ice solid carbon dioxide changes from solid to gas?
Early Agriculture Has Kept Earth Warm for Millennia
Ice core data, archeological evidence, and other studies suggest humans had a significant influence on Earth's preindustrial climate.
By Sarah Stanley19 January 2016
📷Farmers work on a rice paddy terrace in southern China. Mounting evidence suggests that early agriculture may have contributed to preindustrial warming of Earth’s climate. Credit: AP Photo/Xinhua, Yu Xiangquan
Source: Reviews of Geophysics Modern human activity is known to drive climate change, but global temperatures were already affected by farmers millennia before the Industrial Revolution. For years, scientists have been debating about the size of preindustrial warming effects caused by human activities. Now, according to Ruddiman et al., new evidence confirms that early agricultural greenhouse gas emissions had a large warming effect that slowed a natural cooling trend.Earth’s climate has cycled between warmer interglacial and cooler glacial periods for 2.75 million years as a result of cyclic variations in the Earth’s orbit. The current Holocene epoch, which began about 11,700 years ago, is an interglacial period.This newsletter rocks.
Get the most fascinating science news stories of the week in your inbox every Friday.SIGN UP NOWIn an earlier study, Ruddiman compared Holocene trends with data from previous interglacial periods over the past 350,000 years. Instead of slowly decreasing—as observed early in previous interglacial periods—carbon dioxide levels began to rise 8000 years ago, and methane levels started increasing 5000 years ago. These increases correspond with the onset of early agriculture, which, Ruddiman hypothesized, may have produced enough greenhouse gases to slow the normal cooling trend.Now Ruddiman and 11 colleagues have more thoroughly compared the Holocene with past interglacial periods. They assessed ice core records from Antarctica, which provide a record of greenhouse gas levels and temperature-sensitive geochemical indices going back 800,000 years. If preindustrial warming were due to natural causes, the Holocene trends should fit the patterns of past interglacial periods.Instead, the team found that Holocene patterns deviate from the norm—suggesting human influence. The comparisons confirmed that gas trends during the last few millennia have been anomalous and thus anthropogenic. An interglacial period near 800,000 years ago is the best analog to the Holocene in terms of natural orbital variations. Toward the end of this analogous period, carbon dioxide (CO2) levels had decreased by 17 parts per million (ppm), but by the same point in the preindustrial Holocene, the CO2 levels had risen by 20 ppm. The anthropogenic greenhouse gas emissions necessary to explain this 37-ppm difference is very close to the 40-ppm amount originally hypothesized by Ruddiman in 2003.The team also reviewed archaeological and paleoecological evidence. Studies show that the spread of rice irrigation is likely responsible for much of the increase in atmospheric methane between 5000 and 1000 years ago. The spread of livestock across Asia, Africa, and Europe—as well as other agricultural activities like burning weeds and crop residues—contributed as well.Deforestation that accompanied early agriculture could be responsible for the carbon dioxide increase that began nearly 7000 years ago. New pollen data from Europe reveal mainly preindustrial deforestation, and archaeological data from north central China suggest major forest loss as well.More research is needed to reveal exactly how much carbon dioxide and methane was produced by these early agricultural practices, the scientists say. It seems, however, that the argument of whether early farming emitted enough preindustrial gas to keep Earth warm has been largely put to rest. (Reviews of Geophysics, doi:10.1002/2015RG000503, 2015)—Sarah Stanley, Freelance WriterCitation: Stanley, S. (2016), Early agriculture has kept Earth warm for millennia, Eos, 97, doi:10.1029/2016EO043793. Published on 19 January 2016.
I would like to open a discussion on the Ruddimann Hypothesis and the implications related to agriculture and the climate.
Which type of bacteria uses CO2 as a sole source of carbon for growth and microorganism that uses organic chemicals as a source of carbon?
Is it true that in climatic cycles FIRST TEMPERATURE rises, and some or hundred years later also the CO2 concentration in the atmosphere?
Is it right that this theory would implicate, that rising CO2 concentration in the air itsself is not the real primary reason for climate change of today, as I got told?
Other times does this mean, that even when TEMPERATURE in the atmosphere drop, CO2 drops yet far more later in years or hundred years ?
This cycle would also thrive the up and downgoing ice ages. Is it true?
Could we rule out the possibility of 'residual CO2 trapping' in structural and stratigraphic traps, where, only, water drainage occurs upon CO2 injection?
find the flame temperature or adiabatic flame temperature of syngas with the following composition:
- O2 - 6.7
- CO - 2.2
- H2 - 2.5
- CO2 - 12.42
- CH4 - 2.97
- GCV - Calculated at 3.39
Looking to find the method and an example please as this isnt really a strong point of mine and I have found myself deep down a hole!!!
I am working of the impediments of Co2 reinjection and would like to review the current reinjection statistics.
The buying and selling of credits that permit a company or a country to emit a certain amount of carbon dioxide or other green houses. The carbon trading is done with a goal of gradually reducing overall carbon emissions and mitigating their contribution to climate change. Carbon trade agreement allow for the sale of carbon credits in order to reduce the total emissions.
Does solar panels reduce carbon footprint and does solar energy produce more carbon dioxide than fossil fuels?
How much oxygen is produced by things in the ocean and does carbon dioxide dissolve better in the ocean than oxygen?
What was the highest oxygen level on Earth and why does deep ocean water have more carbon dioxide and less oxygen?
Is there more oxygen in water at higher altitudes and how do the oceans absorb excess CO2 from the atmosphere?
Does the ocean absorb more CO2 than trees and which part of the ocean is the largest carbon reservoir?
I am planning on transitioning towards Power-to-X with a focus on water splitting and CO2 to fuel applications. However, there is still a lot that I need to learn before I can start working on the subject. Can you please recommend some good resources to start understanding these techniques from the very basics?
How is carbon exchanged between biosphere and hydrosphere and burning of fossil fuels upset the balance of the carbon dioxide cycle?
I am trying to measure Fe (II) with the 1-10-Phenanthroline method in my water samples that will come from hydrothermal experiments containing CO2. Preliminary testing show that carbonate interferes with the measurement. Does anyone know of a work around to this?
What are the reasons why it is so hard to completely degreenhouse the agricultural sector?
What is the yearly minimum level in the next decades in billion tons in GHG to expect?
1. The grain and crop yield may be called carbon sequestration?
2. If yes, what is the conversion factor i.e. one kg of grain/straw sequestrated how much GHG i.e. CO2 equivalent.
My research topic is A detailed study to explore how to reduce aviation greenhouse gas emissions (CO2) in Multidimensional Integrated Stabilization Mission in the Central African Republic (MINUSCA) - A case study to examine the GHG (CO2) emission and the impact of aircraft operations on the environment in the Central African Republic.
Does decomposition of organic matter add or remove carbon dioxide and what is responsible for the decomposition of organic matter?
A substance at the supercritical state is considered a fluid -- something neither gas nor liquid. What is the scientific argument on why compressors and gas turbines are used in supercritical Brayton CO2 cycles instead of pumps?
What is the relation between excitation energy and maximum absorption wavelength in the UV-vis spectrum?
for example, the attached picture is the UV-vis spectrum of CO2, visualized by Gaussview. The excitation energy is 7.37eV, but there is no absorption peak. I am confused about the concept of absorption.
What is the advantage of calculating the higher number of excited states?
Any help is really appreciated.
I seeded two flasks (T-12.5) in two different CO2 incubators. They contained the same number of cells, the same media, etc. The one-seeded in the rarely used incubator had an abnormal morphology ( the cell had more extension like pseudopodia), and after 2-3 days, the media had changed to entirely yellow. )
Please have a look at this.
Is this due to contamination? If so, why the change in cell morphology? What kind of contamination?
How do plants maintain a balance in the environment and how do desert plants balance the need for CO2 with the need to avoid water loss in hot temperatures?
I would like help locating scientific information on the growth of Paulownia spp. in forest plantations. I am especially interested in the stock of biomass and CO2 for a given plantation age. Some web pages indicate these species as wonders and attribute them a stock of 1,500 t/ha (biomass) in 7 years. I have some doubts that this is true.
I look forward to your comments.
Hi I'm conducting research on the photocatalytic reduction of carbon dioxide, and I'm stuck at choosing the ideal column for my gas chromatography setup to quantify my results. The expected products are (carbon monoxide, formic acid, methane and methanol). The main solvent for this experiment is Acetone so all products are expected to be dissolved in acetone too. What column should I choose?
How the balance of carbon dioxide disturbed in nature and what is will happen to the environment if the balance of carbon dioxide in the air is disturbed?
Estimate the potential impact of widespread soil carbon stabilization on global carbon dioxide emissions.
Since replacing CO2 tanks today, we've been hearing a squeaking noise every time the incubator replenishes its CO2 (like a squeaky grocery cart wheel). I see the pressure dip briefly when the noise starts (indicating that the gas is being used) & once the incubator reaches 5% CO2, it stops. It seems like the noise is coming from the regulator, but it's hard to pin point the source. I'm usually the one who changes out the tanks, but somebody else did it for the first time today; it seems like she did everything right, but maybe she overlooked something. Our system doesn't usually make noise...how do I make it stop?
Currently I have difficulty to grow S. pneumoniae. Somehow it does not grow well. The OD600nm gets only upto 0.5 - 0.8 after 5 days of innoculation with TSB + 5% CO2
On testing MIC, it does not grow any (OD600nm 0.04) in CAMHB (standardized condition of CLSI)
I would like to ask your protocols of growing S. pneumoniae. Which exact condition you have used to have fully growth during conventional growth phase of bacteria (I mean 16 - 18 hours)
Any suggestions and advices are welcoming
Thanks a lot ,
Reference for my method
I am examining trade differential and CO2 emissions in SSA. I have T=42years and N=37countries. The model is suffering from cross sectional dependence and heteroskedasticity, which may render the fixed effect estimator biased and inconsistent. Which method is suitable? Thanks advance for your humble suggestions.
Climate change: Problem would remain solved by giving up the use of fossil fuels?
1. In the context of ‘global greenhouse gas emissions by gas’, even if we ignore (a) CO2 release from forestry and other land use (11%); (b) methane (16%); (c) nitrous oxide (6%); (d) fluorinated gases (2%); to what extent, will we be able to curtail 65% release of CO2 from fossil fuel and industrial processes?
If not, does it mean that “Are we addicted to fossil fuels?” “We’’ means whom do we refer to? (Those, who are in their 20’s or 60’s: Who exactly was addicted? And, I personally think that it may not be fair to bring everyone on the same platform by suddenly start concerning about their future generations) Well, if I cannot curtail (a) 24% global greenhouse gas emissions by ‘agriculture, forestry & other land use’; (b) 25% by electricity & heat production; (c) 14% by transportation’ (d) 6% by buildings; then, how could the curtailment essentially by industry from its 20% is going to make a huge impact (leaving aside the 10% of global greenhouse gas emission by other energy forms)? Are we going to expect a drastic reduction from China, US & India from its current global CO2 emissions from fossil fuel combustion (and some other industrial processes)?
2. How long oil & gas industry would continue maintaining it’s contribution to the global economy and to it’s growth and development @ global-scale ‘significantly’?
Whether it’s current global domestic product of 3% would come down drastically in the near future?
Whether oil & gas industry’s status as one of the world’s most traded commodities may soon change in the near future?
If so, what is the rate @ which the trade in crude oil would come down in the next 10 years – from its current value of around US$650 billion?
In case, if the rate of decline remains to be significant, then, how about the employment provided by the oil and gas industries – from its current employable capacity of around 12 million people per annum globally?
3. Well, even, if we get along with Paris agreement – by not bothering about the way each and every oil & gas industry that gets affected (and in turn, its massive employability @ global-scale), are we sure that we will have no more environmental concerns that will become a threat to sustainable development in its economic, social and environmental dimensions "by any other means" on this earth?
I personally feel that only the nature of the problem will keep on changing from time to time, while, science and technology cannot provide any solution to get rid-off all the problems faced by human being as we have started challenging the nature - in the name of science and technology - rather than trying to understand its very nature.
It's similar to trying to understand on what exactly happens to my energy after my last breathe - having known that energy can neither be created nor be destroyed.
I'd like to include some background for the problem I'm having. I'm working with Candida glabrata isolates in 96 well plates. My plate conditions are: 1*10^6 cells/mL, 5%CO2, 24h incubation and RPMI 1640. Media was made fresh on Monday and cells were counted and seeded on Thursday.
For two weeks I've had spotty growth in my biofilms, instead of a nice clean sheet across the bottom of the well I see several small dots like colonies. This is consistent across all of my wells except for my negative control. Does anyone have any suggestions on how to prevent this from happening in the future?
I am seeking professional input on addressing climate change. In my work, I have seen decades of debate or hesitation of buy in by financial markets to actually address the main problem at play: the anthropogenic over-production of carbon dioxide and destruction of planetary carbon sinks. When we address this anthropogenic problem we say human-caused climate change or global warming or climate crisis. So far, despite saying we need to change, little action, especially in finance, takes place, especially on the scale needed. Often, the problem itself is too confusing and too large of a problem to really tackle a solution that is obvious and measurable.
My scope of work is looking at changing the common vernacular use of climate change to address the exact problem at hand: the anthropogenic over-production of dissolved CO2 gas into the atmosphere and destruction of planetary carbon sinks. The goal is to call that Global Carbon Crisis vs. what we have been calling it with confusion, climate change. After all, climate change has been an ongoing, natural process since the advent of polar ice caps.
The additional piece I am looking to address is the effective measurability which is already an infrastructure in place, called the Global Carbon Index. Essentially measuring a specific location CO2 production by contrast to overall global production at time of measurement.
What I am hoping to accomplish is a discussion if climate change to address this real problem should be used any more and why or why not. Also, to discover if fellow researchers feel this work is warranted to develop a systematic means to solve this difficult problem to assist buy in with financial incentives by using a defined unit of measure, the Global Carbon Index, to incentivize or discourage current production.
One potential solution to mitigate climate change is to enhance carbon sequestration by using crops that can absorb significant amounts of carbon from the atmosphere. Kenaf is a fast-growing plant identified as having the potential to sequester carbon and reduce GHG emissions.
how can we measure the capacity of kenaf for carbon sequestration and estimate the amount of CO2 ?
La importancia de conocer como esta acelerando la inserción del CO2 a causa de las actividades del ser humano como parte integrante para buscar el crecimiento económico y su desarrollo es de suma importancia.
Even before carbon dioxide, did we have a problem with nitrous oxide too?
1. Back in 1970, it was claimed that the excess nitrogen buildup (from the use of synthetic fertilizers, discharge of wastewater or from the combustion of fossil fuels) would make ‘all land unusable’ (by polluting land, water & air, while it will also exacerbate climate change and would deplete the ozone layer) – despite the fact that it makes the sky blue, forms the foundation of proteins in our bodies and helps make soils fertile. Whether nitrous oxide (released from the microbial reactions between ‘soil’ and ‘active nitrogen fertilizer’) is not 300 times more potent @ warming the atmosphere than carbon dioxide?
Such released nitrogen won’t remain active in the atmosphere for more than 100 years?
It’s more than 50 years now. Whether ‘CO2 fever’ has suppressed excessive nitrogen emission for time being?
2. Back in 2004, nearly a couple of decades back, it was claimed that Britain will become Siberia by 2024. On the contrary, Heathrow Airport recorded 40.2 degree Celcius in July 2022. On the other hand, very recently, California appeared to be heading into a fourth year of devastating drought before back-to-back atmospheric rivers and a blast of arctic air dumped enormous amounts of rain and snow between late December and March, creating a huge Sierra Nevada snowpack.
For a layman, how reliable are these forecasts?
3. Have we successfully captured the multiple mechanisms associated with a ‘regional heating or cooling’ – associated with their spatial and temporal patterns of temperature change – with reference to ‘decadal oscillations of ocean temperature’?
4. Whether regional patterns of climate change has a positive correlation with the global mean temperature change?
Or, at least,
do we have a clarity on ‘the deterministic response to climate forcings (from that of unforced variability)’ from the observed regional climate change?
Have we frozen the timescale so far – over which we will be able to simulate and analyze regional changes of the past as El Nino and La Nina cycles have hardly impacted the last eight years only (and hence more reliable climate data must be measured over periods of decades)?
Could you help me with some documentation in which it can be found information about the average lifetime centrifuge and CO2 incubator?
Why is the cycle important to the environment and carbon dioxide in the atmosphere significant to maintaining the health of an ecosystem?
How does carbon dioxide and oxygen flow in an ecosystem and what happens to matter within an ecosystem?
I would like to prepare a calcium carboxylate. The procedure is overbasing the carboxylic acid with excessive Ca(OH)2 than bubbling CO2 through it to precipitate CaCO3. Can I just throw some pieces of dry ice into the mixture? Gas cylinder is hard to handle.
We are studying the adsorption of CO2 onto the activated carbon by which the adsorption mechanism is physisorption.
By comparing the models to the experimental data of the breakthrough curves (C/C0 with time), we see that the Thomas model and the pseudo second order fit but the pseudo first order model doesn't. And as we know the pseudo-first order describes the physisorption process but the pseudo-second order describes the chemisorption process. In our case, the process is physisorption, thus, I would like to ask you about the physical phenomenon behind that concerning the fitting of the models.
The sale of the above solution for the treatment and prevention of contamination of water baths within CO2 incubators is not permitted in Europe anymore.
I am working on research project in which I need plants which give out maximum carbon dioxide. I just wanted name of that plants and it's description. Could anybody help me to find out this plants?
Agriculture is an important sector of the U.S. economy. The crops, livestock, and seafood produced in the United States contribute more than $300 billion to the economy each year. When food-service and other agriculture-related industries are included, the agricultural and food sectors contribute more than $750 billion to the gross domestic product. Agriculture and fisheries are highly dependent on the climate. Increases in temperature and carbon dioxide (CO2) can increase some crop yields in some places. But to realize these benefits, nutrient levels, soil moisture, water availability, and other conditions must also be met. Changes in the frequency and severity of droughts and floods could pose challenges for farmers and ranchers and threaten food safety.