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Sean Nash

Bioart Source - 0 views

bioart.niaid.nih.gov

Bioart images NIH digital photos art modeling models display project hinorsbiology research ISEF GKCSEF HSR HSR-2025 science environmental botany mathematics biology chemistry

shared by Sean Nash on 29 Oct 24 - No Cached
  • Sean Nash on 29 Oct 24
     
    A new NIH product that includes free-to-use biological art
Sean Nash

Airplane Noise Exposure May Increase Risk of Chronic Disease | SPH - 0 views

www.bu.edu/...crease-risk-of-chronic-disease

HSR HSR-2025 airplane noise disease environmental science questions statistical analysis mathematics computer science potential research idea behavioralscience

shared by Sean Nash on 06 Jun 24 - No Cached
  • people who were exposed to higher levels of noise from aircraft were more likely to have a higher body mass index, an indicator for obesity that can lead to stroke or hypertension. The findings highlight how the environment—and environmental injustices—can shape health outcomes
  • self-reported body mass index (BMI)
  • The study is the first to explore a connection between aircraft noise exposure and obesity nationwide in the United States; past studies on this subject have focused on European populations, and results have varied
    • Sean Nash
      Sean Nash on 06 Jun 24
       
      It would be interesting to see how these studied varied. I would bet that there are other, stronger factors overlying this effect, and it would be challenging to tease out this signal from other socioeconomic factors, but I very much like this concept.
  • ...8 more annotations...
  • “Prior research has shown that aircraft noise can elevate stress responses and disturb sleep, but there has been mixed evidence of any links with body mass index,” says study lead and corresponding author Matthew Bozigar, assistant professor of epidemiology at OSU and a former postdoctoral associate at SPH. “We were surprised to see a fairly robust link between aircraft noise and higher body mass index among women across the US.”
  • These new findings underscore the role of the environment on one’s risk of chronic disease.
  • Junenette Peters, associate professor of environmental health, and colleagues examined airplane noise exposure and self-reported BMI and other individual characteristics among nearly 75,000 participants living around 90 of the major US airports
  • The team examined aircraft noise levels every five years from 1995 to 2010, using a day-night estimate (DNL) that captures the average noise level over a 24-hour period and applies a 10 dB adjustment for aircraft noise occurring at night, when background noise is low.
    • Sean Nash
      Sean Nash on 06 Jun 24
       
      I'm sure there are low-powered data loggers that measure dB that we could plant in various places (varying distances from airports (or other things... even just distances from population centers in general). This would allow us to not only work with and search for correlations between data points already collected, but also to generate more specific data on our own. The human data might not necessarily have to be collected by us. The challenge might be just to find databases that have already been collected for various reasons. Much science is done in this way, where instead of generating a ton of data to analyze, the researcher used previously collected data to ask new and interesting questions of.
  • Although the team acknowledges that BMI is a suboptimal metric, the independent and strong association between more aircraft noise exposure and higher BMI that they observed is notable.
  • “We can only hypothesize about why we saw these regional variations, but one reason may relate to the era of regional development, building characteristics, and climate which may affect factors such as housing age, design, and level of insulation,” says Peters. “Regional differences in temperature and humidity may influence behaviors such as window opening, so perhaps study participants living in the West were more exposed to aircraft noise due to open windows or housing type, which allowed more noise to penetrate.”
    • Sean Nash
      Sean Nash on 06 Jun 24
       
      The really interesting work here would be teasing interesting patterns out of really complex data sets. For example, people living near airports typically live in housing that is less expensive due to the lesser desirability of living in that area. That tends to correlate with lower socio-economic status found near airports. However, this is interesting because the major flightpaths to the KCI airport do not exactly line up in this way. For example, three of the school districts in Missouri that line up with KCI runways (Park Hill Schools - where we live, Platte County Schools, Kearney Schools, Smithville Schools, and the northern part of North Kansas City Schools) are all of a higher than average socioeconomic status than outlying areas closer to the city. This is unusual in major metropolitan areas.
  • Previous data suggest that Black, Hispanic, and low-income populations are disproportionately exposed to aircraft noise. The participants in the NHS study groups were primarily White and of mid-level socioeconomic status. 
    • Sean Nash
      Sean Nash on 06 Jun 24
       
      Again, this is a bit different than around most airports. The area immediately surrounding KCI is rather white and mid-to-upper SES.
  • “We need to study the potential health impacts of environmental injustices in transportation noise exposures alongside other environmental drivers of poor health outcomes” Bozigar says. “There is a lot more to figure out, but this study adds evidence to a growing body of literature that noise negatively impacts health.”
    • Sean Nash
      Sean Nash on 06 Jun 24
       
      What other environmental factors can be studied either by direct measurement, or by querying previously-collected data to ask/answer questions about environmental health?
emmarrogers

Acute toxicity of triazine pesticides to juvenile signal crayfish (Pacifastacus leniusc... - 0 views

pubmed.ncbi.nlm.nih.gov/24362090

crayfish HSR-2025 HSR pesticide environmental

shared by emmarrogers on 13 Sep 24 - No Cached
  • The aim of this research was to evaluate the acute toxicity of atrazine, hexazinone, metribuzine, prometryne, simazine, and terbutryne
  • 96hLC50
    • emmarrogers
      emmarrogers on 17 Sep 24
       
      96 hours for the lethal concentration to kill 50 percent of the population
  • mg.l-1
    • emmarrogers
      emmarrogers on 17 Sep 24
       
      Milligrams per litre
Kylie John

Drought-induced injury is associated with hormonal alteration in Kentucky bluegrass - PMC - 0 views

www.ncbi.nlm.nih.gov/...PMC6768267

HSR-2025 HSR botany hormones lawngrass

shared by Kylie John on 20 Sep 24 - No Cached
  • Mature KBG (cv. ‘Wildhorse’) plugs (10 cm diameter, 5 cm deep)
  • The grass was transplanted into pots (15 cm diameter, 15 cm deep, with 8 holes on the bottom) filled with either top soil and sand mixture (2:1, v/v). A piece of plastic screen was placed in the bottom of the pot to prevent soil from leaching.
  • at optimum conditions (mean±SD) at 22 ± 0.8/16 ± 0.6°C (day/night), 70%±8% relative humidity, PAR at 400 ± 9 µmol m−2 s−1 and 12-h photoperiod. Nitrogen was applied at 2 g m−2 (from 28–8-18 complete fertilizer with micronutrients) at transplanting and then 1 g m−2 biweekly on all treatments until the end of the trial.
  • ...22 more annotations...
  • trimmed at 7 cm and irrigated two times a week to field capacity.
  • Six weeks after transplanting
  • For drought stress treatment, the amount of irrigation water was determined based on evapotranspiration (ET) loss by weighing the pots every other day and the irrigation was provided to compensate 30% to 50% ET loss. ET was determined by weighing the pots.
  • VWC was reduced from 34.6% to 27.9% between day 0 and day 7, from 27.9% to 23.4% between day 7 and day 14, from 23.4%% to 14.5% between day 14 to day 21, and from 14.5% to 5.1% between day 21 and day 28.
  • Leaf chlorophyll was extracted with acetone and measured using a spectrophotometer
  • Leaf photosynthetic rate and stomatal conductance were measured using a portable photosynthetic system
  • turf quality started to decline at day 7 due to drought stress.
  • Drought stress reduced turf quality rating by 14.8% relative to the control at the end of drought stress (28 d).
  • The electrolyte leakage increased gradually from day 7 through day 21 due to drought stress.
  • Drought stress increased electrolyte leakage by 35.6% at day 14, 95.7% at day 21, and 105.4% at day 28 when compared to the control.
  • chlorophyll began to decline after day 7 due to drought stress
  • educed chlorophyll content by 39.0% relative to the control.
  • photosynthetic rate due to drought stress was observed as early as day 7
  • Stomatal conductance decline was first observed at day 4 of drought stress
  • day 28 when drought stress reduced stomatal conductance by 84.4%
  • The ZR level declined gradually from day 14 through day 28 due to drought stress. Drought stress reduced ZR by 28.5% at day 14, 35.1% at day 21, and 59.1% at day 28 relative to the control.
  • 1 week after ZR did. At the end of drought stress (day 28), drought stress reduced iPA by 50.4% relative to the control.
  • Drought stress reduced leaf IAA by 14.3% and 26.7% at day 21 and day 28, respectively, when compared to the control.
  • The ABA started to accumulate after day 4 of drought stress and the difference between drought stress and the control was observed as early as 7 d of drought stress
  • The ABA content gradually increased from day 7 through day 28. Drought stress increased leaf ABA by 23.6% at day 7, 30.7% at day 14, 87.6% at day 21, and 108.5% at day 28 relative to the control.
  • drought stress did not impact leaf GA4 content
  • We found that ABA/CK increased sharply from day 14 through day 28 due to increase in ABA and decline in CK (ZR + iPA) during the same period. At the end of trial (day 28), drought stress induced an increase in leaf ABA/CK ratio by 3.4-fold relative to the control.
emmarrogers

Herbicides in Water Sources: Communicating Potential Risks to the Population of Mangaun... - 0 views

www.ncbi.nlm.nih.gov/...PMC10302186

shared by emmarrogers on 13 Sep 24 - No Cached
  • The mean concentrations of atrazine, metolachlor, simazine and terbuthylazine were 0.02 mg/L, 0.01 mg/L, 0.03 mg/L and 0.02 mg/L, respectively
  • Algae and invertebrates were also sensitive to atrazine,
  • Their corresponding average concentrations were 0.02 mg/L, 0.12 mg/L, 0.03 mg/L, and 0.01 mg/L.
  • ...1 more annotation...
  • The mean concentrations of atrazine, metolachlor, simazine, and terbuthylazine were 0.03 mg/L, 0.01 mg/L, 1.82 mg/L, and 0.06 mg/L
emmarrogers

Effect of Chronic Exposure to Prometryne on Oxidative Stress and Antioxidant Response i... - 0 views

www.ncbi.nlm.nih.gov/...PMC3976930

crayfish pesticide HSR-2025 HSR environmental biology behavioralscience

shared by emmarrogers on 20 Sep 24 - No Cached
  • oxidative stress
    • emmarrogers
      emmarrogers on 20 Sep 24
       
      Is this the same a phycological stress, or is it a different kind of stress?
emmarrogers

Effects of Prometryn Exposure on Hepatopancreas Oxidative Stress and Intestinal Flora i... - 0 views

www.ncbi.nlm.nih.gov/...PMC10451815

crayfish pesticide HSR-2025 HSR environmental biology behavioralscience

shared by emmarrogers on 20 Sep 24 - No Cached
  • Eriocheir sinensis
    • emmarrogers
      emmarrogers on 20 Sep 24
       
      Chinese mitten crab
  • alternative to atrazine due to its low toxicity
  • In addition, due to its low toxicity to fish, prometryn can be applied directly to aquatic activities for the removal of harmful algae and weeds in aquaculture waters
  • ...3 more annotations...
  • However, there is a paucity of studies on the negative effects of prometryn on aquatic crustaceans.
  • could affect the physiological behavior of crustacean aquatic organisms
  • Previous studies have shown that the commonly used herbicides glyphosate and atrazine are capable of causing oxidative stress,
emmarrogers

Acute exposure to chlorpyrifos and glyphosate induces changes in hemolymph biochemical ... - 0 views

pubmed.ncbi.nlm.nih.gov/31055068

shared by emmarrogers on 25 Sep 24 - No Cached
  • glyphosate
    • emmarrogers
      emmarrogers on 25 Sep 24
       
      this is the most common herbicide in use agriculturally, and in common use. The trade name for this herbicide is Round up, which is a very common herbicide.
  • 49.55 ± 4.66 μg L-1
  • 7.83 ± 0.50 mg L-1
nataliegomes

Potential Pain in Fish and Decapods: Similar Experimental Approaches and Similar Result... - 1 views

www.ncbi.nlm.nih.gov/...PMC8093373

HSR HSR-2025 science behavioralscience invertebrates crabs potential research idea

shared by nataliegomes on 19 Jun 24 - No Cached
Sean Nash liked it
  • how they provided guidance on general methods that could be applied to other animals such as decapod crustaceans.
  • indicate that responses of both go beyond those expected of mere nociceptive reflex.
    • nataliegomes
      nataliegomes on 19 Jun 24
       
      Where is the limit between a reflex and a cognitive response?
  • Sean Nash on 01 Jul 24
     
    I really like this topic, and it is one that is getting some current attention. so, we obviously cannot discern cellular-level factors with the nervous system of animals (and obviously- especially when dealing with pain response, we would have to work exclusively with invertebrates and the experimental design would have to be very well thought out. That said, behavioral studies where you have a really tight experimental design set up.... and you're recording behavioral changes... is likely feasible. If this is interesting, keep digging into pain vs. reflex studies, and also begin to look at invertebrate models that we can both successfully raise... and that have interesting behavioral responses we can readily discern in the lab.
Kylie John

The Role of Reactive Oxygen Species in Plant Response to Radiation - PMC - 0 views

www.ncbi.nlm.nih.gov/...PMC9968129

HSR-2025 HSR botany x-rays

shared by Kylie John on 23 Aug 24 - No Cached
  • ROS (Reactive oxygen species) are reactive oxidants in plant cells, including hydrogen peroxide (H2O2), superoxide anions (O2•−) and hydroxide anion radicals (·OH), which may stimulate the antioxidant system of plants and act as signaling molecules to regulate downstream reactions.
emmarrogers

Sub-acute toxicity of the herbicide glufosinate-ammonium exposure in adult red swamp cr... - 0 views

pubmed.ncbi.nlm.nih.gov/37742863

crayfish HSR-2025 HSR potential research idea pesticide

shared by emmarrogers on 16 Sep 24 - No Cached
  • 21 days
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      This is over 7 times the other studies I have seen
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      they are usually 24-96 hours
emmarrogers

Environmentally relevant atrazine exposures cause DNA damage in cells of the lateral an... - 0 views

www.ncbi.nlm.nih.gov/...PMC6854318

shared by emmarrogers on 16 Sep 24 - No Cached
  • 80 ppb atrazine
  • 10 days
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      This is the longest time I have seen so far. most studies are between 24-96 hours
  • banned in the European Union
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      I wonder why it is banned in the EU, but not the US
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      increased risk of prostate cancer and decreased sperm count in men, and a higher risk of breast cancer in women. reason why its banned
  • ...3 more annotations...
  • evapotranspiration
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      Loss of water from the soil both by evaporation from the soil surface and by transpiration from the leaves of the plants growing on it.
  • ATR is the most commonly detected herbicide in the U.S. Midwestern region
  • This is a cause for concern as ATR can leach into aquatic ecosystems and affect aquatic organisms.
emmarrogers

Determination of Glyphosate in Water from a Rural Locality in México and Its ... - 0 views

pmc.ncbi.nlm.nih.gov/...PMC7579432

crayfish HSR-2025 environmental glyphosate

shared by emmarrogers on 29 Mar 25 - No Cached
  • 0.4 and 18 μg/L
    • emmarrogers
      emmarrogers on 29 Mar 25
       
      micrograms, but can still be concerning since it is know to cause cancer
    • emmarrogers
      emmarrogers on 29 Mar 25
       
      concerning
  • mg/L in Australia,
  • 700 μg/L
    • emmarrogers
      emmarrogers on 29 Mar 25
       
      Under what we tested but interesting
emmarrogers

Hormetic effects of glyphosate on plants - PubMed - 0 views

pubmed.ncbi.nlm.nih.gov/28094904

crayfish HSR-2025 environmental glyphosate

shared by emmarrogers on 30 Mar 25 - No Cached
  • Hormetic effects of glyphosate on plants
    • emmarrogers
      emmarrogers on 30 Mar 25
       
      very interesting
  • low rates of any herbicide might be used to modulate plant growth
emmarrogers

Occurrence and fate of the herbicide glyphosate and its degradate aminomethylphosphonic... - 0 views

pubmed.ncbi.nlm.nih.gov/21128261

crayfish HSR-2025 glyphosate environmental

shared by emmarrogers on 11 Apr 25 - No Cached
  • The concentrations of glyphosate ranged from <0.01 to 9.1 ng/m(3) and from <0.1 to 2.5 µg/L in air and rain samples, respectively.
  • emmarrogers on 11 Apr 25
     
    "The concentrations of glyphosate ranged from
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