- Debasree Purkayastha asked a question:Survey questionnaire related to bin allocation problem, kindly take this survey.
Respected Sir/ Madam,
I am attaching a survey form related to bin allocation problem, it will take few minutes to complete the form. kindly spare your valuable time to take up the survey. This is part of a research work. Those who r from Environmental background please fill up the form.
PLEASE PARTICIPATE IN THE SURVEY. AN EARLY RESPONSE WILL BE HIGHLY BENEFICIAL.
Thanks & Regards,
M.Tech (Environmental Engineering) Scholar,
Department of civil engineering,
National Institute of Technology, AgartalaFollowing
- Kenneth M Towe added an answer:What is the physical evidence of the impact of global warming and climate change on forests?
There are too many studies have been done so far. The vast majority of these are based on the scenarios. Really need to wait long time that to see the effects of climate change. But we can also predict in shorter by assessing changing of natural ecosystem composition and health. So, is there any strong physical evidence (scientifical study) related this topic?Following
- Hanno Krieger added an answer:What collection system should be more efficient in a rural mountain region? “Door to door” or through collection points ?
While I was studying the illegal dumping issue in rural areas of Neamt County (Romania) I noticed that type of waste collection services may influence the behavior of inhabitants regarding the waste disposal. Frequently, the linear morphology of villages (built-up areas) along the rivers and tributaries favor the waste dumping on their banks near the households. In case the localities are served by sanitation services it seems that “ door to door” system is more effective than collection points. In the latter case the proper location of these points within a village is crucial in order to avoid the illegal dumping. Also, there can be a combination between these two systems..such as “door to door” system for mixed wastes and collection point for recyclables. What is your opinion about these collection systems ..? Which of those should be more effective in a mountain region?
I´m astonished about the optimism in your statement. Surely you will find a lot of tidy people taking care for their surrounding. But you only need a small sloppy and lazy minority and the best lanscape degenerates to a huge waste deposal. No regarding the frequent human ignorance and irresponsibility the door to door technique is the better solution.Following
- Mark Krause added an answer:Should I buy Ibuprofen acid form or salt form for LC-MS standard?
I am going to buy some ibuprofen standard, when I search online, found there are acid form and sodium salt form, which one should I buy for my LC-MS standard for environmental analysis?
The sodium form is more soluble in water. If you are going to be working with aqueous solutions I'd recommend the sodium formFollowing
- Chin Yik Lin added an answer:What could be the plausible sources of Al, Mn, K and Fe in rainwater?
The rainwater samples were collected in a suburb of Kuala Lumpur (Malaysia) after a prolonged drought and haze episode. These samples were filtered and acidified prior to analysis by ICP-MS.
Thank you for the information Dr. ten Brink. I shall look into the wind trajectory to see if there is other possible sources that could help explain this.Following
- Paulinus Woka Ihuah added an answer:What are the land management and environmental factors that must be considered in site selection for Abattoir construction in sub saharan Africa?An ongoing study on the location of abattoirs in selected towns in West and Central Africa shows a pattern of locating them adjacent to creeks and other water bodies for ease in the discharge of the meat production waste, mostly untreated, into receiving water bodies. This is a serious land management and health issue.
I think the lack of the relevant stakeholders inclusion and participation will be an influential factors.
Also the policy supporting such project development must be overlooked.
Lack of project need assessment will equally sways the developmentFollowing
- Jason Iles added an answer:How can we utilise -omics on understanding how organisms adapt and interact with their environment and with each other?
This is regarding micro-organism so i think SNP genotyping would not be one of methods but PCR MP and ADSRRS would be in consideration. Which one will be more comfortable for E. coli. Thank you
Look up Brukers Bio-Typer, its an expensive set up but uses a shotgun proteomics approach for taxonomy the same principle could be applied for your question i should imagine.
Alternatively you could use RT-PCR to analyse gene regulation due to environmental conditions.
Conventional PCR techniques always just asks a simple question- is the gene present and cannot go much beyond this question besides sequencing.Following
- Riad Djellouli added an answer:What is a good alternative way to preserve soil samples for diatom analysis where it is not possible to keep them in a freezer. Would ethanol work?
Trying to figure out an alternative way to store diatom samples (from soil) during a 3-week expedition in warm climate, where the use of a freezer may not be possible at all times. Would submerging the samples in e.g ethanol or some other chemical work?
if your study is purely based on the identification of diatom taxa. you do not need to preserve diatoms because they resistFollowing
- Jacinta Okeakpu added an answer:Can FTA classic cards be used for the field sampling and long term preservation of RNA viruses?
I wish to know if anyone has experience with the use of FTA cards for the collection, safe transport, and preservation of rabies samples.
Sure, FTA mini cards can be used for collection, transportation and preservation microbial samples over time and the nucleic acid be extracted at the time of use.
I am currently concluding a study where FTA minicards were used to collect samples, stored and is being processed after 1 year. And, this technique so far has proven to be highly sensitive and specific as well.Following
- Barbara Sawicka added an answer:Heritiera fomes (Sundari plants) are diminishing in number from Indian Sundarbans. Why?
Increase of salinity due to decrease of freshwater input may be one reason. Give more reasons. Attach your papers on it if possible.
Maybe here you will find the answer:
MICRO-NUTRIENT ACTIVITY OF SUNDARI (Heritiera fomes), THE MANGROVE PLANT. www.tjprc.org/download.php?...%20Micronutrient%...
Report Code 024_GBP_IIT_ENB_DAT_06_Ver
1_Sep 2012. gangapedia.iitk.ac.in/sites/default/files/024_ENB.pdf
- Ron S Mahabir added an answer:Is anyone familiar with point (or other disaggregated datasets) on water quality, global or at least for Africa?
It would be great if such a data is collected and available for scientists. Even better if it is updated regularly.
Thanks in advance,
Thanks Andrew, that's an awesome site.Following
- Dr. Abd Elmoniem Ahmed Elzain added an answer:What processes are involved in the analysis of radon concentration by the deployment of alpha track detectors?
Are the track detectors reusable after analysis?
Does anyone have idea of the laboratory where the analysis can be carried out?
Sorry I mean NTDs or SSNTDs.Following
- Mohamed Abd El-Aal added an answer:Can anyone suggested a program to deduce the relationship between soil parameters and plant species in their habitat?In my work, I study the habitat of certain dominated plants. I carried out a soil analysis and the associated species, but the results of the soil analysis is a very large table. How do I therefore explain the correlation between plants and soil in my analysis?
thank yo very much Grace Solomon-WisdomFollowing
- Sachin Patil added an answer:Which is better, saturated soil paste or dilute water extract ?I was wondering if it might be better for the determination of soluble salts from a soil to prepare a saturated soil paste and dilute it by 5 rather than prepare a 1:5 dilute water extract. A dilution of the soil paste would enable a smaller soil sample and yet the result of the existing ions would be in theory the same while the dilute 1:5 water extract would dissolve more ions because there is excessive water in direct contact with the soil.
What it is your opinion?
Here is one more question in this line.
Will EC measured of saturation extract (soil solution) ECe exactly match with EC measured in saturated paste ECsp (Measurement in soil paste by dipping electrode)?
- Arezoo Dadrasnia added an answer:How to calculate the mean cell residence time (MSRT) in laboratory experiment?
I am using bacteria for remediation of oil from water for a period of 40 days (in laboratory), so how can I calculate MCRT by mass balance?
Thanks for your guidance. How about the first order kinetic model..can I use this model or should be pseudo-order zero reaction? Are they different..Following
- Chaozhi Pan added an answer:How can we examine the effect of pH on aluminum species distribution in coagulation?
To examine the effect of pH on aluminum species distribution in coagulation, synthetic water containing 5×10-4 mol/L NaHCO3 and NaNO3 in distilled water is prepared for control experiments. The final solution contains 2×10-4 mol Al/L which is the common dosage in practice. The solution isanalyzed subsequently by ferron assay after coagulants are added under rapid stirring at 120 rpm for 2 min.
This method is given by several researchers , but because of elapsed time and the fact that the ferron test is carried out in a buffered solution at around pH 5, can the results of this method be relevant to the species formed during an actual coagulation test with natural water? what about the effect of AL(OH)3 precipitation which is formed right after adding alum coagulant between pH 6 and 7?
I think you could refer to the aquatic chemistry textbook to find the constant. At least you could judge the predominant species in your artificial system.Following
- Pablo Rodríguez-González added an answer:What is the best way to determine Tributyltin in seawater using LCMSMS?
My team and I are working on a method to determine the concentration of TBT in seawater. We tried to directly inject the filtered sample in seawater using 2% Formic Acid in Water and 2% Formic Acid inMethanol as A and B respectively. the problem that we're facing is that we can't get linearity with increasing concentration.
we also believe that our sample preparation are not exactly good enough. we are trying to avoid SPE method though. Can any one share their opinion on this.
Thank you. I really appreciate any help/opinion/advise
My opinión is that LC-MS methods for TBT determination in waters is quite challenging, as I have serious doubts that this technique can reach the detection limits required for a proper TBT monitorization.
Please be aware that the European Union Environmental Quality Standard for TBT in surface waters is 0.2 ng/L and that the recommended LOQ is 0.06 ng/L. From my experience such a low level can only be achieved by using Gas chromatograhy coupled to ICP-MS or by GC-EI-MSMS after a high preconcentration of the sample..
If you use GC you will need to apply a derivatization step which can be easily carried out with Sodium tetraethylborate and a liquid-liquid extraction. Both steps can be done simultaneiously in five minutes. Also, the application of Isotope Dilution Mass Spectrometry is highly recommended to correct for all posible sources of error.
Hope this helps
- Harry ten Brink added an answer:Carbon Content in Particulate Matters ?
How to calculate the different forms of carbon (EC, OC, BC) from total blackness of particulate matter?
Total (?) blackness\
Do you mean there is also colored desert dust in your sample?
Summary: blackness is a measure for so-called Black Carbon
EC / OC is determined in a completely different and much more expensive approachFollowing
- Mohammed Hosny Ibrahim added an answer:Can someone tell me of any new and important Papers and journals about UAE water quality in Al-Hayer area and gulf countries ?
some papers and journals which are more acurate
thank you for your helpFollowing
- Leigh Benson added an answer:Are HOBO Pendant Data Loggers ok for wetland monitoring?
I would like to monitor water quality parameters in wetland systems for an extended period over several sites. Is anyone using these? how have they been performing in the field? I would like to log data every hour and download data approx. every three months depending on access. Is there a similar waterproof data logger I can use? I have been using micro divers for depth, temp and conductivity which are good but a bit expensive. in addition to these I would like to measure pH, salinity, DO, TDS, turbidity, Nitrates, Phosphates and light.
Thanks Nathan they do seem to be an cost effective tool.Following
- Sarwan Kumar Dubey added an answer:Does anyone know how to calculate "field workability" on a daily basis?
We have daily precipitation information. Can you assume that some soil type's dryoff at .10" per hour and other soils dry at a slower rate. If you know the time of the rainfall in a field then is it a matter of hours of drying until the field is dry enough to drive on?
Hi Harvey Freese; Attached link may be helpful to you. RegardsFollowing
- Taratisio Ndwiga added an answer:Does anybody know of studies investigating the effect of garbage dumpsites on the migratory (movement) habits of large carnivores?
Several studies have investigated the influence of garbage dumpsites on the migratory patterns of birds. For example studies carried out in Spain showed a great increase in the number of storks that remain in Spain feeding on rubbish dumps during their wintering periods, instead of moving to their traditional winter quarters in Africa.
I can’t find anything similar for (large) carnivores. This may also be due to the fact that the majority of the large carnivores are territorial and do not really migrate...
A similar case among carnivores would be if polar bears would remain on shore around garbage dumpsites all year round instead of moving back onto the ice as the winter approaches and the sea freezes.
Look at this article: www.nps.gov/yell/planyourvisit/upload/RI_2014_10_Wildlife.pdf and www.researchgate.net/publication/229925937_Effects_of_an_open_refuse_pit_on_space_use_patterns_of_spotted_hyenasFollowing
- Sarah Ali added an answer:Is the Lutron 4 in 1 Environment Meter (Airflow, Temp, Light, Humidity) LM8000 effective for assessing microclimatic impacts of urban tree cover?
Does anyone have experience using it for such similar studies?
Is the device sufficient to carry out the work?
Thank you for your reply, Mr. RatemoFollowing
- Jort Hammer added an answer:How I can measure biosurfactants (type and amount) in oily wastewater?Please introduce instrumental methods.
Well dependent on what surfactants you are working with you can use a HPLC with a C18 column and a detector such as an MS. This allows you to detect most surfactants, also at low concentrations. However, you can also use other detectors like FLU for some surfactants, or ELSD.Following
- Aníbal Gusso added an answer:How to calculate "Air temperature" from "land surface temperature"?Air temperature from LST (day and night).
Hi Miss Sally,
In situ measurements for several regions, when temperature is above zero, we can observe that this difference is usually 3oC at night. I mean surface temperature is 3oC below air temperature at the meteorological station (1,5m). However, during the day, surface temperature is higher than air temperature but it depends highgly on latent and sensible heat fluxes. Specially due to surface coverage, i.e. vegetation structure, soil moisture etc.
- Priscilla ndubuisi guimaraes added an answer:Is there an epidemiological study that investigates the impact of lead on the health of villagers drinking water from a well contaminated by it?
An epidemiological study that shows the effect of drinking water from a well that has been contaminated with lead from nearby chemical works.
Thank you allFollowing
- Pavel Ozerski added an answer:How can we estimate the tolerance range of any vertebrate species towards human disturbances in natural environmental conditions?
Please suggest any published work addressing the same question. Personal opinions are also invited.
Maybe my answer will seem to be too "theoretical" but... The term "tolerance" should be applied to a response of the biosystem to ONE environmental factor but the anthropogenic disturbance is a big COMPLEX of a lot of factors. I think, generally you need to get information (results of field observations and maybe also laboratory experiments) about the effect of different combinations of different values of different but known factors and then use multidimensional statistics e.g. MANOVA. Sorry if my answer will be useless but your question is too general to find particular answers.Following
- Sarwan Kumar Dubey added an answer:Traditional vs integrated waste management system…who’s the winner in your country?
Traditional waste management systems is based on landfill of waste (often non-compliant sites with environmental regulations) and mixed waste collection with poor facilities for recycling and waste recovery. On the other hand, the integrated waste management systems are based on separate collection, 3R policy (reduce ,reuse, recycle) and energy recovery. Which systems prevail in your country? And what are the proper solutions in order to provide the transition to an integrated waste management system?
Of Course Traditional one in my country India. As integrated waste management needs lot of infrastructure and political will and commitment. Although in Metros big cities solid waste is being managed in integrated way where as more than 70% of population is still living in villages and towns where integrated management approach is still to be introduced. We are forwarding towards integrated management of solid waste very very fast and may be within coming five years scene will change. My Firm believe.Following
- Ali Asghar Moshtaghie added an answer:How does one collect rainwater for examine pH and solutes? Is there a protocol, limit area, specific time or instruments?
I need to know about pH and other solutes for studies with acid rain and your effects in arid and semi arid places.
Dear Sara you may interested to measure elments concentration in rainwater you should be care of contamination.Simply by puting a funel in to preacid washed glass ware such as beaker or erlen and collect rainwater .You may centrifuge it first and do your experiment.Filter paper may already contaminated with metals and make your analysis more difficult.Following
About Environmental Analysis
Environmental analysis is the use of analytical chemistry and other techniques to study the environment. The purpose of this is commonly to monitor and study levels of pollutants in the atmosphere, rivers and other specific settings.