Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology |
- Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
- AskScience AMA Series: I'm Jane Pearson. I'm a psychologist at the National Institute of Mental Health (NIMH). As we observe Suicide Prevention Awareness Month this September, I'm here to talk about some of the most recent suicide prevention research findings from NIMH. Ask me anything!
- How much light can be pumped into a fiber optic cable?
- How do open source VPNs (Such as OpenVPN) protect your data when the source code available?
- Does urbanization in previously Desert areas cause an increase in rainfall?
- What’s the tallest mountain chain to have ever existed on Earth? Is it possible one higher than Everest has existed?
- Chemically speaking, what makes fentanyl such a potent drug relative to similar drugs?
- In High Performance Liquid Chromatography, why are mixtures in ratios?
- How long did Triceratops's horns grow?
- Do we have more myelinated or unmyelinated fibers in our body?
- In what stage of human development do we have the most stem cells?
- How far off and how fast do planes start their descent to an airport? How does the local geography affect it?
- Why are only 3-4 strains, based on predictions and educated guesses, included in a flu vaccine?
- What's the realistic limit for reducing relaxation times for MRI scans?
- Did red or blond hair exist in pre-Columbus South America/Central America?
- Are there any colonial organisms composed of specialized zooids within the Phylum Mollusca?
- Why the Plasma color is different when in contact with the glass?
- Is it possible to have a perfectly anonymized database?
- How does a baby being born prematurely result in stunted physical, emotional, or mental development?
- How does Mendel Laws apply for haploid organisms ?
| Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 04 Sep 2019 08:11 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Biology, Chemistry, Neuroscience, Medicine, Psychology Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| Posted: 05 Sep 2019 04:00 AM PDT Hi, Reddit! My name is Jane Pearson, and I am from the National Institute of Mental Health (NIMH). I'm working on strategies for our research that will help prevent suicide. Suicide claims over 47,000 lives a year in the U.S. and we urgently need better prevention and intervention strategies. Thanks to research efforts, it is now possible to identify those at-risk using evidence-based practices, and there are effective treatments currently being tested in real-world settings. I'm doing this AMA today to highlight how NIMH-supported research is developing knowledge that will help save lives and help reverse the rising suicide rates. Today, I'll be here from 12-2 p.m. ET – Looking forward to answering your questions! Ask Me Anything! If you or someone you know is in crisis and needs immediate support or intervention, call the National Suicide Prevention Lifeline at 1-800-273-8255, or text the Crisis Text Line (text HELLO to 741741). Both services are free and available 24 hours a day, seven days a week. The Lifeline is a national network that routes your confidential and toll-free call to the nearest crisis center. These centers provide crisis counseling and mental health referrals. You can call for yourself or on behalf of a friend. If the situation is potentially life-threatening, call 911 or go - or assist a friend to go - to a hospital emergency room. Lives have been saved by people taking action. To learn about the warning signs of suicide, action steps for supporting someone in emotional pain, and crisis helpline numbers, go to the NIMH Suicide Prevention webpage. Additionally, you can find recent suicide statistics, here: https://www.nimh.nih.gov/health/statistics/suicide.shtml [link] [comments]  |
| How much light can be pumped into a fiber optic cable? Posted: 04 Sep 2019 01:19 PM PDT I've been working with fiber optic cabling for data at work, and it is pretty neat stuff, but i don't know that much about the technical end of it. I was thinking about how fiber optics could be used as a light pipe for an intense white light source (i think there are some surgical headlamps built like this) I understand collimators would be required at both ends to focus the light into the cable, and then to disperse the light into a usable beam. What sort of things would limit the amount of light that could be pumped into the fiber? If i were to light up the cable assembly with a 50W source, would there be anything from stopping me using a 500W source? Would the fiber completely saturate and be unable to transmit more light at some point? Assuming the cable is glass, standard diameter (62.5uM). Thanks. [link] [comments]  |
| How do open source VPNs (Such as OpenVPN) protect your data when the source code available? Posted: 04 Sep 2019 07:37 PM PDT I'm aware that VPNs encrypt your data in a way where that if someone did see your data, it wouldn't be legible unless they had the "Key." My question is, how do open source VPNs defend against a third party who knows the code from decrypting your data? I'm sure there has to be a way to defend from that, otherwise their security would be almost nonexistent, so what is the way VPNs defend against this? Apologies for any formatting problems, I'm on mobile. [link] [comments]  |
| Does urbanization in previously Desert areas cause an increase in rainfall? Posted: 04 Sep 2019 01:52 PM PDT I would think that areas that become more urbanized have an increase in rainfall due to increased albedo from the vegetation that people grow. [link] [comments]  |
| Posted: 04 Sep 2019 09:08 PM PDT This may have been posted already, but I can't find much on it via google. I assume that orology can only tell us so much, but I once read the Appalachian Mts were as tall as the Rockies before they were weathered down, while the Himalayas are still somewhat new in geological terms. I'm interested if there are any mountains that may have existed on Earth with some evidence that they have surpassed the Himalayas in height or prominence, if not, as a side question, why is the history of past mountain ranges so difficult to track/ study? I know next to nothing about orology or geology so all input is welcome! [link] [comments]  |
| Chemically speaking, what makes fentanyl such a potent drug relative to similar drugs? Posted: 04 Sep 2019 12:15 PM PDT |
| In High Performance Liquid Chromatography, why are mixtures in ratios? Posted: 04 Sep 2019 04:24 PM PDT For example, to separate two similarly molecules like water and 1-pentanol, why are they in a ratio like (70:30)? How does this allow for better separation? [link] [comments]  |
| How long did Triceratops's horns grow? Posted: 04 Sep 2019 11:29 AM PDT |
| Do we have more myelinated or unmyelinated fibers in our body? Posted: 04 Sep 2019 12:50 PM PDT Also, where is which? I don't get it where could we need slow conductors when we can have the cool fast ones. [link] [comments]  |
| In what stage of human development do we have the most stem cells? Posted: 04 Sep 2019 06:02 AM PDT |
| Posted: 04 Sep 2019 11:05 AM PDT Since planes fly at around 35,000 feet, I imagine it would be drastically different from airport to airport. Whether landing at near sea level like Seattle, or over a mile up in Denver, the descent feels the same to a passenger. Even though only some of those flights pass over mountains right before landing as well. Would the descent rate be any faster or slower based on geography? [link] [comments]  |
| Why are only 3-4 strains, based on predictions and educated guesses, included in a flu vaccine? Posted: 04 Sep 2019 10:57 AM PDT According to the CDC, the most effective vaccine from the past 15 years was only 60% effective, with most being quite a bit less so (https://www.cdc.gov/flu/vaccines-work/effectiveness-studies.htm). Why not develop and administer vaccines that address more, or even all of the strains and increase the efficacy of flu vaccination? [link] [comments]  |
| What's the realistic limit for reducing relaxation times for MRI scans? Posted: 04 Sep 2019 04:55 AM PDT Recently I've become more interested in understanding how MRIs work and have been doing some independent research in trying to see what the limiting factors are in terms of what makes them take so damn long compared to CTs. I understand that they use organic gadolinium compounds as contrast material in order to increase relaxation rates and increase intensity of the image created for far better resolution and the proposed use of gadolinium nanotubes that have an even greater effect. What's really needed or what would be the breakthrough for the chemistry required to massively impact time of acquisition of data? If total inverse RT is the sum of inverse RTs, could you add more materials with a combined effect like resistors in a parallel circuit? [link] [comments]  |
| Did red or blond hair exist in pre-Columbus South America/Central America? Posted: 04 Sep 2019 10:38 AM PDT |
| Are there any colonial organisms composed of specialized zooids within the Phylum Mollusca? Posted: 04 Sep 2019 10:29 AM PDT I am currently researching colonial organisms composed of individual animals, such as the Portuguese Man O' War, and have found little information on colonial species composed of zooids with structural and functional variation outside the well known Hydrozoans. Is being composed of a colony of specialized zooids a feature unique to Hydrozoans, or are there organisms with this feature outside the phylum Cnidaria? I am especially curious if there are any colonial organisms within the phylum Mollusca, as the concept of a colonial organism with the RNA editing abilities of Cephalopods is quite intriguing to me. [link] [comments]  |
| Why the Plasma color is different when in contact with the glass? Posted: 04 Sep 2019 10:28 AM PDT Hello! Searching some images of plasma ball is easy to notice that there're a lot of colors. I know that these colors are due to relaxation electronic transitions. But if we notice, the colors of one plasma ball are not homogeneous, inside the ball there is some blue sparks, and near the glass, the color changes. I'm seeking for this explanation and can't find it. Any leads? Thx. [link] [comments]  |
| Is it possible to have a perfectly anonymized database? Posted: 04 Sep 2019 10:14 AM PDT Having a database containing vast amount of data (e.g. human behavior, medical records, work data, etc.) could be extremely useful for AI learning and scientific analysis. However, personal data security is a big issue. Is it in theory possible to have such database that is both useful and secure? Or is impossible to use all these data together without an option to deanonymize personal data? Bonus question: Could there be a quantum equivalent of such database? It seems that quantum systems have some useful properties here. While you can work with the whole information, if you look closely decoherence happens, you get a "random" result and are limited by the uncertainty principle. [link] [comments]  |
| How does a baby being born prematurely result in stunted physical, emotional, or mental development? Posted: 04 Sep 2019 09:51 AM PDT |
| How does Mendel Laws apply for haploid organisms ? Posted: 04 Sep 2019 08:33 AM PDT How can I say which trait is dominant or recessive? How are characters expressed ? [link] [comments]  |
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