Best 313 quotes in «chemistry quotes» category

People have wracked their brains for an explanation of benzene and how the celebrated man, August Kekulé, managed to come up with the concept of the benzene theory. With regard to the last point especially, a friend of mine who is a farmer and has a lively interest in chemistry has asked me a question which I would like to share with you. My 'agricultural friend' apparently believes he has traced the origins of the benzene theory. 'Has Kekulé,' so ran the question, 'once been a bee-keeper? You certainly know that bees too build hexagons; they know well that they can store the greatest amount of honey that way with the least amount of wax. I always liked it,' my agricultural friend went on, 'When I received a new issue of the Berichte; admittedly, I don't read the articles, but I like the pictures very much. The patterns of benzene, naphthalene and especially anthracene are indeed wonderful. When I look at the pictures I always have to think of the honeycombs of my bee hives.

People used to recognize it as mood. Science has revealed it as cannabinoids. When you feel sad, just do long running. Then you will know that even mood can be governed.

Perfume can be good . . . especially if you get one that goes with your chemistry." - Adrian Ivashkov

[photography]... wanted to understand, to master for myself, all the processes involved, and to manipulate them in my own way.

Planck...and Bohr...have invented systems containing electrons of which the motion produces no effect upon external charges...[N]ot only [is this] inconsistent with the accepted laws of electromagnetism, but I may add, is logically objectionable, for that state of motion which produces no physical effect whatsoever may better be called a state of rest.

Science began with a gadget and a trick. The gadget was the wheel; the trick was fire. We have come a long way from the two-wheel cart to the round-the-world transport plane, or from the sparking flint to man-made nuclear fission. Yet I wonder whether the inhabitants of Hiroshima were more aware of the evolution of science than ancient man facing an on-storming battle chariot. It isn't physics that will make this a better life, nor chemistry, nor sociology. Physics may be used to atom-bomb a nation and chemistry may be used to poison a city and sociology has been used to drive people and classes against classes. Science is only an instrument, no more than a stick or fire or water that can be used to lean on or light or refresh, and also can be used to flail or burn or drown. Knowledge without morals is a beast on the loose.

Sharing certain important core values is one of the key factors that determine the chemistry of a relationship/partnership.

Some subjects mixed well with weed, but Chemistry wasn’t one of them.

Sorry for the delay," Vogel said. "I was required to make a bomb.

The chemists are a strange class of mortals, impelled by an almost insane impulse to seek their pleasures amid smoke and vapour, soot and flame, poisons and poverty; yet among all these evils I seem to live so sweetly that may I die if I were to change places with the Persian king.

The chemists who uphold dualism are far from being agreed among themselves; nevertheless, all of them in maintaining their opinion, rely upon the phenomena of chemical reactions. For a long time the uncertainty of this method has been pointed out: it has been shown repeatedly, that the atoms put into movement during a reaction take at that time a new arrangement, and that it is impossible to deduce the old arrangement from the new one. It is as if, in the middle of a game of chess, after the disarrangement of all the pieces, one of the players should wish, from the inspection of the new place occupied by each piece, to determine that which it originally occupied.

The discovery of an interaction among the four hemes made it obvious that they must be touching, but in science what is obvious is not necessarily true. When the structure of hemoglobin was finally solved, the hemes were found to lie in isolated pockets on the surface of the subunits. Without contact between them how could one of them sense whether the others had combined with oxygen? And how could as heterogeneous a collection of chemical agents as protons, chloride ions, carbon dioxide, and diphosphoglycerate influence the oxygen equilibrium curve in a similar way? It did not seem plausible that any of them could bind directly to the hemes or that all of them could bind at any other common site, although there again it turned out we were wrong. To add to the mystery, none of these agents affected the oxygen equilibrium of myoglobin or of isolated subunits of hemoglobin. We now know that all the cooperative effects disappear if the hemoglobin molecule is merely split in half, but this vital clue was missed. Like Agatha Christie, Nature kept it to the last to make the story more exciting. There are two ways out of an impasse in science: to experiment or to think. By temperament, perhaps, I experimented, whereas Jacques Monod thought.

The first rule of chem lab is to never heat a closed system or it will explode.

The Kiss. It seemed like more than a kiss. It felt more like alchemy.

The name explains the structure: carbon, hydrogen, and oxygen bond into a ring-shaped structure called a cresol (also found in creosote), and phosphorus hangs on to the ring like an exhausted swimmer gripping a life preserver.

[The] structural theory is of extreme simplicity. It assumes that the molecule is held together by links between one atom and the next: that every kind of atom can form a definite small number of such links: that these can be single, double or triple: that the groups may take up any position possible by rotation round the line of a single but not round that of a double link: finally that with all the elements of the first short period [of the periodic table], and with many others as well, the angles between the valencies are approximately those formed by joining the centre of a regular tetrahedron to its angular points. No assumption whatever is made as to the mechanism of the linkage. Through the whole development of organic chemistry this theory has always proved capable of providing a different structure for every different compound that can be isolated. Among the hundreds of thousands of known substances, there are never more isomeric forms than the theory permits.

The uniformity of the earth's life, more astonishing than its diversity, is accountable by the high probability that we derived, originally, from some single cell, fertilized in a bolt of lightning as the earth cooled. It is from the progeny of this parent cell that we take our looks; we still share genes around, and the resemblance of the enzymes of grasses to those of whales is a family resemblance.

Pussy is everywhere. Dick is everywhere. Chemistry isn't.

{Recalling Professor Ira Remsen's remarks (1895) to a group of his graduate students about to go out with their degrees into the world beyond the university:} He talked to us for an hour on what was ahead of us; cautioned us against giving up the desire to push ahead by continued study and work. He warned us against allowing our present accomplishments to be the high spot in our lives. He urged us not to wait for a brilliant idea before beginning independent research, and emphasized the fact the Lavoisier's first contribution to chemistry was the analysis of a sample of gypsum. He told us that the fields in which the great masters had worked were still fruitful; the ground had only been scratched and the gleaner could be sure of ample reward.

Several billion trillion tons of superhot exploding hydrogen nuclei rose slowly above the horizon and managed to look small, cold and slightly damp.

So how do you do it? Not make a baby, balance an equation. I did biology last year.

So what if we have chemistry. Chemistry doesn't miraculously turn bad boys into good ones.

That the nobility of Man, acquired in a hundred centuries of trial and error, lay in making himself the conquerer of matter, and that I had enrolled in chemistry because I wanted to maintain faithful to that nobility. That conquering matter is to understand it, and understanding matter is necessary to understanding the universe and ourselves: and that therefore Mendeleev’s Periodic Table, which just during those weeks we were laboriously learning to unravel, was poetry, loftier and more solemn than all the poetry we had swallowed doen in liceo; and come to think of it, it even rhymed! … [T]he chemistry and physics on which we fed, besides being in themselves nourishments vital in themselves, were the antidotes to Fascism … because they were clear and distinct and verifiable at every step, and not a tissue of lies and emptiness like the radio and newspapers.

The capital ... shall form a fund, the interest of which shall be distributed annually as prizes to those persons who shall have rendered humanity the best services during the past year. ... One-fifth to the person having made the most important discovery or invention in the science of physics, one-fifth to the person who has made the most eminent discovery or improvement in chemistry, one-fifth to the one having made the most important discovery with regard to physiology or medicine, one-fifth to the person who has produced the most distinguished idealistic work of literature, and one-fifth to the person who has worked the most or best for advancing the fraternization of all nations and for abolishing or diminishing the standing armies as well as for the forming or propagation of committees of peace.

The dogma of the impossibility of determining the atomic constitution of substances, which until recently was advocated with such fervor by the most able chemists, is beginning to be abandoned and forgotten; and one can predict that the day is not far in the future when a sufficient collection of facts will permit determination of the internal architecture of molecules. A series of experiments directed toward such a goal is the object of this paper.

The human mind adjusts itself to a certain point of view, and those who have regarded nature from one angle, during a portion of their life, can adopt new ideas only with difficulty.

THE MAXIMS OF MEDICINE Before you examine the body of a patient, Be patient to learn his story. For once you learn his story, You will also come to know His body. Before you diagnose any sickness, Make sure there is no sickness in the mind or heart. For the emotions in a man’s moon or sun, Can point to the sickness in Any one of his other parts. Before you treat a man with a condition, Know that not all cures can heal all people. For the chemistry that works on one patient, May not work for the next, Because even medicine has its own Conditions. Before asserting a prognosis on any patient, Always be objective and never subjective. For telling a man that he will win the treasure of life, But then later discovering that he will lose, Will harm him more than by telling him That he may lose, But then he wins. THE MAXIMS OF MEDICINE by Suzy Kassem

The optimist sees the glass half full. The pessimist sees the glass half empty. The chemist sees the glass completely full, half in liquid state and half gaseous, both of which are probably poisonous.

There are moments in our lives when we meet someone and we feel as if we have known them all our lives. It seems astounding really to know that you can understand each other so well. It feels fascinating when you find out that even if you both are meeting for the first time, there is already an amazing chemistry happening between you two! And what is captivating is the depth to which you already know each other; almost like you both know each other inside out. When you both look into each other's eyes, you both already know what is going on in each other's minds. As if words are not required at all to understand the thoughts, feelings, and emotions of the other person. It feels as if you both know each other from centuries ago in time! It feels absolutely exhilarating when you do find this person in your life. And then your life becomes totally awesome and amazing.

There was something ghost-like and insubstantial about gases to these early chemists. They called liquids that turned into gases easily, "spirits." Methyl alcohol, they called "wood spirit"; ethyl alcohol, "wine spirit." Even today, alcoholic beverages are frequently referred to as "spirits." (Modern Arabs, from whose language the word "alcohol" was taken, call ethyl alcohol "spirit" from the English. This is a queer exchange.)

This irrelevance of molecular arrangements for macroscopic results has given rise to the tendency to confine physics and chemistry to the study of homogeneous systems as well as homogeneous classes. In statistical mechanics a great deal of labor is in fact spent on showing that homogeneous systems and homogeneous classes are closely related and to a considerable extent interchangeable concepts of theoretical analysis (Gibbs theory). Naturally, this is not an accident. The methods of physics and chemistry are ideally suited for dealing with homogeneous classes with their interchangeable components. But experience shows that the objects of biology are radically inhomogeneous both as systems (structurally) and as classes (generically). Therefore, the method of biology and, consequently, its results will differ widely from the method and results of physical science.

This isn't just chemistry. It's the whole periodic table." ~Cain

This is one experiment guaranteed to produce unexpected fireballs from time to time. Expect them.

Thus, for those of us who make only a brief study of chemistry, the benefits to be expected are of an indirect nature. Increased capacity for enjoyment, a livelier interest in the world in which we live, a more intelligent attitude toward the great questions of the day--these are the by-products of a well-balanced education, including chemistry in its proper relation to other studies.

Time is a strange phenomenon that understands the physics of our world, but never the chemistry of it

Today chemists can artificially make hundreds of thousands of organic compounds, most of which are not duplicated in nature.

Understand something. Fall back from the old times and ways of doing things. Chemistry is deeper than the feels.

Upon the whole, Chymistry is as yet but an opening science, closely connected with the useful and ornamental arts, and worthy the attention of the liberal mind. And it must always become more and more so: for though it is only of late, that it has been looked upon in that light, the great progress already made in Chymical knowledge, gives us a pleasant prospect of rich additions to it. The Science is now studied on solid and rational grounds. While our knowledge is imperfect, it is apt to run into error: but Experiment is the thread that will lead us out of the labyrinth.

To prove to an indignant questioner on the spur of the moment that the work I do was useful seemed a thankless task and I gave it up. I turned to him with a smile and finished, 'To tell you the truth we don't do it because it is useful but because it's amusing.' The answer was thought of and given in a moment: it came from deep down in my mind, and the results were as admirable from my point of view as unexpected. My audience was clearly on my side. Prolonged and hearty applause greeted my confession. My questioner retired shaking his head over my wickedness and the newspapers next day, with obvious approval, came out with headlines 'Scientist Does It Because It's Amusing!' And if that is not the best reason why a scientist should do his work, I want to know what is. Would it be any good to ask a mother what practical use her baby is? That, as I say, was the first evening I ever spent in the United States and from that moment I felt at home. I realised that all talk about science purely for its practical and wealth-producing results is as idle in this country as in England. Practical results will follow right enough. No real knowledge is sterile. The most useless investigation may prove to have the most startling practical importance: Wireless telegraphy might not yet have come if Clerk Maxwell had been drawn away from his obviously 'useless' equations to do something of more practical importance. Large branches of chemistry would have remained obscure had Willard Gibbs not spent his time at mathematical calculations which only about two men of his generation could understand. With this trust in the ultimate usefulness of all real knowledge a man may proceed to devote himself to a study of first causes without apology, and without hope of immediate return.

We —I mean to say we mammals — who in general do not have problems about obtaining water, have learned to wedge it into the urea molecule, which is soluble in water, and as urea we free ourselves of it; other animals, for whom water is precious (or it was for their distant progenitors), have made the ingenious invention of packaging their nitrogen in the form of uric acid, which is insoluble in water, and of eliminating it as a solid, with no necessity of having recourse to water as a vehicle. In an analogous fashion one thinks today of eliminating urban garbage by pressing it into blocks, which can be carried to the dumps or buried inexpensively.

We may regard the cell quite apart from its familiar morphological aspects, and contemplate its constitution from the purely chemical standpoint. We are obliged to adopt the view, that the protoplasm is equipped with certain atomic groups, whose function especially consists in fixing to themselves food-stuffs, of importance to the cell-life. Adopting the nomenclature of organic chemistry, these groups may be designated side-chains. We may assume that the protoplasm consists of a special executive centre (Leistungs-centrum) in connection with which are nutritive side-chains... The relationship of the corresponding groups, i.e., those of the food-stuff, and those of the cell, must be specific. They must be adapted to one another, as, e.g., male and female screw (Pasteur), or as lock and key (E. Fischer).

We need science education to produce scientists, but we need it equally to create literacy in the public. Man has a fundamental urge to comprehend the world about him, and science gives today the only world picture which we can consider as valid. It gives an understanding of the inside of the atom and of the whole universe, or the peculiar properties of the chemical substances and of the manner in which genes duplicate in biology. An educated layman can, of course, not contribute to science, but can enjoy and participate in many scientific discoveries which as constantly made. Such participation was quite common in the 19th century, but has unhappily declined. Literacy in science will enrich a person's life.

We would sit down fifteen, sometimes twenty, to the table on seder nights: my parents; the maiden aunts - Birdie, Len, and before the war, Dora, sometimes Annie; cousins of varying degree, visiting from France or Switzerland; and always a stranger or two would come. There was a beautiful, embroidered tablecloth which Annie had brought us from Jerusalem, gleaming white and gold on the table. My mother, knowing that sooner or later there would be accidents, always had a preemptive "spill" herself - she would manage somehow, very early in the evening, to tip a bottle of red wine onto the tablecloth, and thereafter no guest would be embarrassed if they knocked over a glass. Though I know she did this deliberately, I could never predict how or when the "accident" would occur; it always looked absolutely spontaneous and authentic. (She would immediately spread salt on he wine stain, and it became much paler, almost disappearing; I wondered why salt had this power.)

What does despair mean to someone who interprets that emotion as a chemical reaction in the brain?

What do you call it when you end up right where you’re supposed to be?” Foster simply replies, “The perfect chemistry.

What is chemistry in a relationship, Really? Chemistry can be spontaneous combustion that excites, incites, often harms. But not understood. Chemistry can also be that which is studied, intentional, and knows how to be repeated and improved upon. Do you have the right chemistry?

What is fear but the worry of physical harm coming to the body? The notion that you will lose something-a person, a thing, your memories, yourself. Does he experience that? Do any of them experience that when they can just be put back together again?

What is like chemistry?" "Well. Life." "It's an outrageous farce, Oliver, with an incompetent producer...

When he put the old-fashioned mechanical toy on her palm, she stopped breathing. It was a tiny representation of an atom, complete with colored ball bearings standing in for neutrons, protons, and on the outside, arranged on arcs of fine wire, electrons. Turning the key on the side made the electrons move, what she’d thought were ball bearings actually finely crafted spheres of glass that sparked with color. A brilliant, thoughtful, wonderful gift for a physics major. “Why magnesium?” she asked, identifying the atomic number of the light metal. His hand on her jaw, his mouth on her own. “Because it’s beautifully explosive, just like my X.

This [discovery of a cell-free yeast extract] will make him famous, even though he has no talent for chemistry. {Comment on German scientist Eduard Buchner who later ironically won a Nobel Prize in Chemistry for this discovery}