In this paper I discuss some consequences and manifestations of a mereology of structured wholes in chemistry, with particular reference to the concept of atoms in molecules.

While temporal considerations are of prime importance for chemical reactions, as well as for molecular stability, most chemical concepts are not explicitly formulated on a diachronic basis. It will be argued here that a formulation explicitly incorporating temporal and epistemological considerations enables us to treat chemical reactions and chemical substances on ontologically equivalent terms, instead of assigning a more fundamental status to the latter. After all, in collision theory, a chemical substance is just a collision complex that takes too long. (...) How long qualifies as “too long”, and “too long” in relation to what, are crucial questions that distinguish chemical substances from chemical reactions, and reversible reactions from irreversible ones, thereby introducing anthropocentric considerations into these distinctions. Too long for a lab chemist is very different from too long for an astrochemist studying chemical reactions between chemical substances in inter-stellar space on cosmological timescales. Examining several physical and chemical properties on the basis of which chemical substances are distinguished from one another, the role of temporal and anthropocentric considerations in defining molecular properties is emphasized. I conclude with some observations on the much-debated reduction of chemistry to other disciplines, arguing that such reduction depends on our aesthetic choices as to what kinds of observations demand explanation, and what kinds of explanation are acceptable. (shrink)

The concept of molecular structure is fundamental to the practice and understanding of chemistry, but the meaning of this term has evolved and is still evolving. The Born–Oppenheimer separation of electronic and nuclear motions lies at the heart of most modern quantum chemical models of molecular structure. While this separation introduces a great computational and practical simplification, it is neither essential to the conceptual formulation of molecular structure nor universally valid. Going beyond the Born–Oppenheimer approximation introduces new paradigms, bringing fresh (...) insight into the chemistry of fluxional molecules, proteins, superconductors and macroscopic dielectrics, thus opening up new avenues for exploration. But it requires that our ideas of molecular structure need to evolve beyond simple ball-and-stick-type models. (shrink)

We identified nearly 180 Black women who earned medical degrees prior to the start of the Second World War and found information regarding their family and social connections, premedical and medical educations, and internship experience or lack thereof for many of these women. Through their collective history, we observed large-scale trends, especially regarding the importance of “separatist” medical education and declining medical school attendance among African American women in the 1910s as medicine became an increasingly exclusionary profession. While our research (...) uncovered trends specific to Black women physicians, the implications of our research can be applied far more widely to other historically marginalized scientific practitioners. This research reminds us of the longstanding and shifting presence of Black women in science and medicine, despite the enduring popular belief that white men represent who participates in science, both historically and today. (shrink)

Package downsizing is a practice where the package content is reduced without changing the package or the price of the product. In a market that is defined by ‘hyper-competition,’ package downsizing is often practiced by marketers to effect an invisible price increase for their products. Although marketers may maintain that providing, the legally required, quantity indication on the package is adequate for customers to make logical and informed choices, research indicates that consumers often do not consult quantity indications on packages (...) but use alternative methods (e.g., visual impressions of the package size, total package price, or previous purchase experience) to judge product quantity and to calculate product value. As a subtle means, package downsizing therefore has the potential to mislead customers in the buying process due to an unfavorable balance of information within the dyad. This could give rise to serious moral and ethical consideration. In this paper, we examined various issues related to package downsizing, such as why sellers resort to this type of practice, consumer vulnerability to package downsizing, as well as the extent of protection offered to consumers by the existing laws and regulations with respect to product packaging. Finally, we examined the ethics of package downsizing using the existing legal, moral, and professional ethical standards as well as the principle of equivalence. Our analysis indicates that package downsizing, as it is practiced by the marketers and sellers today, is unethical as far as the consumers are concerned. (shrink)