Category Archives: Science Education

Safety With Corrosives

Back in my undergraduate days I remember finding the CRC Handbook of Laboratory Safety. One photograph really stuck with me. Years later I decided to replicate it and use the image in chemical safety training.

Picture by Arnold Ziffel.

The picture above shows what happens when a solution of soluble proteins in water is subjected to a large excursion in pH in both directions- both highly acidic and highly basic (caustic). The take home lesson is intended to be “wear your damned safety glasses or face shield”. The obvious comparison is between egg white and your corneas. Both have transparency and proteins.

In reality, there is no comparison between the composition between an egg white and a cornea. The human cornea is far, far more complex in composition and structure. Eggs are widely available and cheap. While we see many human corneas every day, they are attached to living people who would, no doubt, put up a tussle with anyone seeking to abscond with one. For a demo, egg white will have to do.

Ribbon structure of ovalbumin. The flat ribbons are called β-pleated sheets. The helical sections are called an alpha helix. Source: Wikipedia.

The major protein in egg white is the globular phosphoglycoprotein ovalbumin at 54 % abundance. According to Google it is “A major storage protein with phosphorylation properties.” Ovalbumin and human serum albumin share a name but little else. Ovalbumin serves as a storage protein source for developing chicks. Human serum albumin serves to maintain balance in the osmotic pressure of blood and to transport substances in the blood stream.

The egg white image is really about the effects of corrosives on protein. Ovalbumin exposed to strong acid will rearrange its globular structure in a way that renders it insoluble and causes agglomeration. Thus the opaque appearance. Trainees look at the image and, knowing they themselves are made of protein, can silently draw their own conclusions about the risk of getting a corrosive in their eyes.

My New View of Electricity and Electrons

Before I went to college I spent 2 years as an apprentice electrician in both residential and commercial wiring. This, plus an early and continuous interest in electronics, I thought I had a good grasp of what electricity was. Only in the last few months in the autumn of my years do I learn that my understanding was just the Dr Seuss version taught in high school.

I sat fat and happy thinking electrical current flowed like water through a pipe. Well, it does not. Wires guide an electric field over the surface of the conductor, moving each electron a tiny distance. The field carries the energy.

A similar situation applies to an electron which, by the way, has no measurable size. There is only an electric field. An electron is a localized disturbance or perturbation in that field that can occupy atomic orbitals or propagate through space. But its “movement” is not like that of a ball sailing through space. It is a kind of pulse in the electric field that has charge and behaves with attributes that people can view and both wave-like and particle-like.

One of the annoying pedagogical tools we can’t get past is the description or illustration of wave motion as an undulation or a squiggle smeared over time. Wave behavior is reciprocating behavior. The view of a water wave as an undulation inferring flow is dead wrong. Water wave motion is vertical, like a fishing bobber. Water waves can be standing in place between barriers or on top of an underlying current. The all too common misunderstanding is in viewing an undulating line itself as the wave rather than the reciprocating movement from peak to trough.

But, if we had properly taught kids about wave motion in the past, would the Beach Boys have been able to sing about catching a wave. I. Just. Don’t. Know.

New USGS Geological Map of USA

The United States Geological Survey, USGS, has released an interactive geological map that includes 4 layers of stratigraphy- Surface, Quaternary, Pre-Quaternary and Precambrian layers with color coded rock units displayed. A click of the cursor on the map reveals the type of rock unit chosen. The website is called The Cooperative National Geologic Map.

Credit: USGS. Surface view shown.

The How and Why of Science

Preamble

There are more than a few definitions of science out there. Every scientist you ask will give their favorite variation on a common theme. The whole business of science is built ideally around the concept of the scientific method. One of the better broad definitions of the scientific method is this-

Wikipedia as a Source of Authoritative Information

First, a homily on Wikipedia as a resource. It’s been my observation that in areas that I am familiar with, i.e., chemistry, aviation, the history of science and a few others, the content I’ve encountered comports well with my general knowledge. The more links and references, the better. And, more often than not, the links actually reflect the content that referenced it. What’s more, Wikipedia encourages input and corrections by the broader community and if you go into edit mode, you can see the list of edits over time. I’ve contributed to a few edits myself. Are there errors or just simple BS in Wikipedia? Well, of course. It’s been said that a camel is a horse designed by committee. While Wikipedia may reveal some of this camel design in places, basically most everything we read or hear is subject to this shortcoming. The freedom to edit a Wikipedia entry is a type of “peer review” but the qualifications of the peers is unknown. Believe me, in science publishing, anonymous peer reviewing is populated with more than a few sanctimonious jerks whose motivations may not be pure.

I’ve spent my career diving into the primary chemical literature via Chemical Abstracts. Primary literature is crucial, but it is usually very narrow in scope and often subject to later revision. This is why review articles, books and monographs are so important. Someone has combed through the primary literature and brought together some structure in an area of study. Wikipedia has become a third tier of scientific information and access for anyone. While it seems quite accurate, we should always be using our best judgement as we read the content. Do the links support the statements? Are there enough links, etc.?

A great deal has been written about the scientific method by those more capable than I so I won’t attempt to blather through it. Instead, I will share an example of how asking a very basic question led me to a treasure trove of information expanding my understanding of the universe.

Science is frequently regarded with excessive reverence, suggesting that it is solely the realm of “proper scientists” and embodies the ultimate truth. However, in reality, it is open to anyone armed with curiosity and resolve. Curiosity drives inquiry, but it is also enhanced by a prepared mind. Some questions illuminate, while others can deceive. A well-posed question can propel one towards the heart of a matter. A ready mind can recognize false trails early on and steer clear of them.

How or Why?

I favor “how” questions over “why” questions because they foster a more mechanistic inquiry into nature and adhere to established physical principles. “Why” questions often carry philosophical or religious connotations and can be laden with presupposed motives or assumptions. This doesn’t render “why” questions invalid; however, they may veer away from the realm of observable natural phenomena, the foundation of scientific inquiry. Asking “How did Stella move the lamp?” may differ from “Why did Stella move the lamp?”. The interchangeable use of ‘why’ and ‘how’ in everyday language can result in imprecise thinking and sloppy conclusions.

Obviously both how and why questions are useful is answering a question. Judicious use of ‘how’ and ‘why’ can lead to more focused thinking about either a mechanistic or motivational question. ‘How’ gets to physical causality whereas ‘why’ often seeks mechanist details but may also leave room for psychological motivation. Either entry into a question is valid depending on what a person wants to know: Physics or psychology.

Sharply pointed scientific inquiry requires the meticulous use of language to convey exact meanings. This scrupulous attention to language demands a precise vocabulary that narrows the scope of interpretation. While this may seem tedious, the benefit lies in getting quickly to the heart of a question. Similarly, lawyers have developed their specialized legalese for this very reason.

Being more precise in one’s use of language is very useful if you’re plagued with complex situations, incomplete information or the need to focus on a mechanistic pathway. ‘How‘ thinking helps with this.

As one accumulates a greater vocabulary over time, the ability to apply nuances into your thinking and communication increases as well since even synonyms can differ a bit in their meaning. As you spend more time in scientific pursuits, you start to realize the value of having good questions to ask. In fact, the skill with which you formulate questions can drive your research further into the unknown, which is where everyone wants to go.

Lamentations on Science Infotainment Rev 2.

Note: This post appeared May 15, 2007, as “Infotainment, Chemistry, and Apostasy“. I have pulled it up through the mists of time for another go and with a few edits.

In the normal course of things I used to give school chemistry talks or demonstrations a couple of times per year and until recently, I had been giving star talks at a local observatory more frequently.  The demographic is typically K-12, with most of the audience being grades 3-8.  From my grad student days through my time in the saddle as a prof, I was deeply committed to spreading the gospel of orbitals, electronegativity, and the periodic table. I was convinced that it was important for everyone to have an appreciation of the chemical sciences.  I was a purist who knew in his bones that if only more people were “scientific”, if greater numbers of citizens had a more mechanistic understanding of the intermeshing great world systems, the world could somehow be a better place. 

In regard to this ideology that everyone should know something about chemistry, I now fear that I am apostate.  I’m a former believer.  What has changed is an updated viewpoint based on experience.  

Let me make clear what science is not. It is not a massive ivory tower that is jealously guarded ajd intended to be impenetrable by mortal folk. Big science requires big funding and organizational support, so big administrative structure forms around it. At its core, science is concerned with learning how the universe works by observation, constructing a good first guess (theory) on what is happening, measurement (conducting quantitative experiments), analysis (quantitative thinking), documentation and communication. The common understanding is that a scientist is someone who has been educated and employed to do these activities. However, anyone who conducts a study of how some phenomenon happens is doing science whether for pay or not.

What science has learned is that the universe is quite mechanistic in how it works. So much so that it can be described by or represented with math. At the fundamental level of ions, atoms and molecules, constraints exist on how systems can interact and how energy is transferred around. At the nanometer-scale, quantum mechanical theory has provided structure to the submicroscopic universe.

Chemical knowledge is highly “vertical” in its structure.  Students take foundational coursework as a prerequisite for higher level classes.  Many of the deeper insights require a good bit of background, so we start at the conceptual trailhead and work our way into the forest. But in our effort to reach out to the public, or in our effort to protect a student’s self-esteem, we compress the vertical structure into a kind of conceptual pancake.  True learning, the kind that changes your approach to life, requires Struggle.

What I found in my public outreach talks on science- chemistry or astronomy- was the public’s expectation of entertainment. Some call it “Infotainment”.  I am all in favor of presentations that are compelling, entertaining, and informative.  But in our haste to avoid boredom, we may oversimplify or skip fascinating phenomena altogether. After all, we want people to walk out the door afterwards wanting more. We want science to be accessible to everyone, but without all the study.

But I would argue that this is the wrong approach to science.  Yes, we want to answer questions.  But the better trick is to pose good questions.  The best questions lead to the best answers. People (or students) should walk out the door afterwards scratching their heads with more questions.  Science properly introduced, should cause people to start their own journey of discovery. Ideally, we want to jump-start students to follow their curiosity and integrate concepts into their thinking, not just compile a larger collection of fun facts. 

But here is the rub. A lot of folks just aren’t very curious, generally.  As they sit there in the audience, the presentation washes over them like some episode of “Friends”.  I suspect that a lack of interest in science is often just part of a larger lack of interest in novelty.  It is the lack of willingness to struggle with difficult concepts.  But that is OK.  Not everyone has to be interested in science.

Am I against public outreach efforts in science?  Absolutely not.  But the expectation that everyone will respond positively to the wonders of the universe is faulty.  It is an unrealistic expectation on the 80 % [a guess] of other students who have no interest in it. I’m always anxious to help those who are interested.  It’s critical that students interested in science find a mentor or access to opportunity.  But, please God, spare me from that bus load of 7th graders on a field trip. 

What we need more than flashier PowerPoint presentations or a more compelling software experience is lab experience.  Students need the opportunity to use their hands beyond mere tapping on keyboards- they need to fabricate or synthesize. You know, build or measure stuff. 

It is getting more difficult for kids to go into the garage and build things or tear things apart.  Electronic devices across the board are increasingly single component microelectronics.  It is ever harder to tear apart some kind of widget and figure out how it works.  When you manage to crack open the case what you find is some kind of green circuit board festooned with tiny components. 

And speaking of electronics or electricity, I find it odd that in a time when electric devices have long been everywhere in our lives, that so FEW people know even the first thing about electricity. I instruct an electrostatic safety class in industry and have discovered that so very, very few people have been exposed to the basics of electricity by graduation. I spend most of the course time covering elementary electrostatic concepts along with the fire triangle so the adult learners can hopefully recognize novel situations where static electric discharge can be expected. Of course, we engineer away electrostatic discharge hazards to the greatest extent possible. But if there is a hole, somebody will step in it. It’s best they recognize it before stepping into it.

The widespread educational emphasis on information technology rather than mechanical skills ignores the fact that most learners still need to handle things. There is a big, big world beyond the screen. A person will take advantage of their mechanical skills throughout their life, not just at work. Hands on experience is invaluable, in this case with electricity. Computer skills can almost always be acquired quickly. But understanding mechanical, electrical and chemical systems need hands-on experience.

Hedging Language Frequency Down in Papers Published in the Journal “Science”

Historically, scientific papers have been not where loud, confident proclamations are made about academic research results. The trend has been a sort of unpretentious modesty to avoid overconfidence and exaggerated claims. A sort of snobismus. Instead, conclusions from research results tend to be more guarded in the interpretation of data. An article in the Scienceinsider section of the AAAS journal Science published 28 July, 2023, has reported that of 2600 papers published in Science between 1997 and 2021, there was a drop of about 40 % in the use of hedging language. Researchers in the study scanned for about 50 terms including “might,” “probably,” “could,” “approximately,” “appear to” and “seem.” They found that these hedging words dropped from 115.8 per 10,0000 to 67.42 per 10,000.

Source: Science, 28 JUL 2023 BY JEFFREY BRAINARD.

The authors suggested that researchers are increasingly unwilling to undersell their work and instead, are using more hyperbolic language such as “groundbreaking” and “unprecedented.”

In an earlier study by C.H. Vinkers et al., published in BMJ, 2015, finished his paper with the following paragraph-

Currently, most research findings could be false or exaggerated, and research resources are often wasted. Overestimation of research findings directly impairs the ability of science to find true effects and leads to an unnecessary focus on research marketability. This is supported by a recent finding that superlatives are commonly used in news coverage of both approved and non-approved cancer drugs. The consequences of this exaggeration are worrisome since it makes research a survival of the fittest: the person who is best able to sell their results might be the most successful. It is time for a new academic culture that rewards quality over quantity and stimulates researchers to revere nuance and objectivity. Despite the steady increase of superlatives in science, this finding should not detract us from the fact we need bright, unique, innovative, creative, and excellent scientists.”

If you sit through a week of presentation sessions at an American Chemical Society national meeting or walk through a poster session, you’ll see a mix of enthusiastic young chemists standing next to their posters and you’ll sit through talks by more established researchers anxious to emphasize the importance of their work. Giving a talk or a poster at a meeting is inherently a promotional activity. It is getting the word out about you and your work in a particular area in front the scientific community and possibly some influential people. It also is something to add to your resume.

Self-promotion by scientific publishing and participation in meetings, called “ballyhoo” in the movie business, is a great way to expose yourself to greater and more frequent opportunity. Make no mistake, the quality and frequency of publications is a very important metric of your accomplishments and potential. This is a sad reality for some and a fortunate reality for a few, but it is reality.

It is hard to draw much from the above research on the hedging frequency as a metric of … what, the unseemly disappearance of proper modesty? The competitive environment of “big academic science” for funds and exposure to impress colleagues and the rank and tenure committee is inevitable. It has been like that for a very long time, but perhaps hidden under the veil of snobbery.

You never know who you might meet at these venues for academic ballyhoo. I once loaned my laser pointer to Al Cotton (who kept it!) and I met Glenn Seaborg at a poster session at the Disney Hotel in Anaheim, CA. I had too many gin & tonics before I spoke with Seaborg and I’m sure that it showed. At a symposium at Purdue University in honor of H.C. Brown (in attendance), I got to see two prominent scientists get into a rather strong “discussion” during a question-and-answer period about who discovered what first. Professor Suzuki (Suzuki coupling) from Japan said something that got under the skin of prof Negishi (Negishi coupling) from Purdue, so they began with point-counter-point exchange (a type of coupling?) which soon accelerated into an argument. As it got more contentious, they switched to speaking Japanese and continued their argument. After a short time, they realized it was best to just sit down as they were providing a “Clash of the Titans” spectacle. This is not a criticism, just an amusing anecdote. Guys like this should battle it out in public more often.

Self-promotion using exuberant language isn’t inherently bad. It is likely that others have already judged you based on far smaller misperceptions. If someone wants to embarrass themselves, let ’em.

Hossenfelder and Poliakoff

One can learn interesting but off-topic things along the way to a particular subject of research. Below is a compilation of interesting things.

We are all aware of the games Russia is playing with the interruption of natural gas supplies to Europe. A noteworthy consequence of this applies to the refining of petroleum. Evidently, refineries use natural gas in the refining process, likely as a fuel for heating process equipment. A shortage of natural gas may/will have an adverse effect on the ability of European refineries to produce fuels from crude oil.

There is a German theoretical physicist named Sabine Hossenfelder who has been producing short videos for YouTube. I’ve seen a few and they are quite good. She doesn’t pander to the lowest common denominator. Instead she speaks like a theoretical physicist talking to intelligent non-specialists and does a bang-up job of it. She gives a thoughtful and skeptical analysis of current topics in theoretical physics. She always gets back to basic concepts and what is possible for science to understand. She has moved on to subjects of popular interest as well.

And speaking of videos on YouTube, I’ve taken a shine to a channel called Periodic Videos. The presenter is professor Sir Martyn Poliakoff of the University of Nottingham. It may take a few moments to overcome the shock of his wild white hair. Poliakoff has produced a great many short videos over the years specializing in the chemical elements. A good one I viewed recently was about burning magnesium in a nitrogen atmosphere. Yes, it can happen and it will produce magnesium nitride. Contact it with water and you get ammonia. It is easy to think that nitrogen is an all around inert gas and for the most part it is. Lithium metal springs to mind when inert atmosphere questions arise. Better use argon.

JWST Jupiter Image in False Color

A spectacular image of Jupiter, its rings and several moons from the James Webb Space Telescope (JWST) was recently released.

When looking at JWST images it is useful to remember that the camera is sensitive in the range of 0.6 (orange) to 5 (mid-infrared) microns. The human eye is sensitive to the range of 0.38 (violet) to 0.75 microns (red)- remember ROYGBIV? Image colors with a wavelength shorter than orange, 0.6 micron, green, blue and violet, are therefore a false color representation. In fact, all of the colors and intensities are chosen with both Hubble and JWST images. NASA is up front about this and an explanation can be found here.

A pet peeve of mine with the recent first radio image of a black hole (Sgr A*) has been that the colors represented are necessarily false, but left unexplained. This is well known to astronomers and other pointy-headed space weenies but not to the flat-headed public. The object may well be orangish from some nearer distance, but the reconstructed radio image we see is processed by software and intentionally given a visual color chosen by some person. This is fine, but a sentence or two about colored radio images is a lost opportunity for greater insight into instrumentation and the properties of light.

Alright, I’m sorry- I exaggerate. The public isn’t flat-headed. Okay? Is that better?

Earth Day on the Pale Blue Dot

This Earth Day of April 22, 2022, is a good time to stop and reflect a moment on our home in the universe. We live on a gleaming blue and white wet rock hurtling around a yellow star in a cosmos so vast that it is well beyond our ability to comprehend. On February 14, 1990, a photo looking back at Earth was taken from a distance of 4 billion miles by the space probe Voyager 1 on its way out of the solar system. This photo features a tiny, pixel-sized, blue dot. Our lonely home world.

So far, this decade of the 2020’s has begun with global contagion and a growing standoff by nuclear powers over culture and real estate. Many are saying that the conflict will lead to famine in Africa and economic chaos elsewhere. How it unfolds is the question on everyone’s mind. If there was ever a time for us to take a pause to look at the big picture, that time is now. We could all use a bit of humility from time to time.

Someone once joked that the international unit of humility should be called the “Sagan.” Carl Sagan the astronomer was a gifted and popular spokesman for astronomy and space science in a time of great discovery and space exploration in the latter 1900’s. Carl Sagan the writer is said to have published more than 600 scientific papers and 20 books for lay audiences. What’s more, in addition to co-writing and narrating a popular TV series, he wrote a piece of science fiction, Contact, that was turned into a popular movie.

Sagan wrote the following-

“Look again at that dot. That’s here. That’s home. That’s us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every “superstar,” every “supreme leader,” every saint and sinner in the history of our species lived there–on a mote of dust suspended in a sunbeam.

The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that, in glory and triumph, they could become the momentary masters of a fraction of a dot. Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner, how frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds.

Our posturings, our imagined self-importance, the delusion that we have some privileged position in the Universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.

The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand.

It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another, and to preserve and cherish the pale blue dot, the only home we’ve ever known.”

— Carl Sagan, Pale Blue Dot, 1994

Copyright © 1994 by Carl Sagan, Copyright © 2006 by Democritus Properties, LLC.