This paper examines the US Atomic Energy Commission’s radioisotope distribution program, established in 1946, which employed the uranium piles built for the wartime bomb project to produce specific radioisotopes for use in scientific investigation and medical therapy. As soon as the program was announced, requests from researchers began pouring into the Commission’s office. During the first year of the program alone over 1000 radioisotope shipments were sent out. The numerous requests that came from scientists outside the United States, however, sparked (...) a political debate about whether the Commission should or even could export radioisotopes. This controversy manifested the tension between the aims of the Marshall Plan and growing US national security concerns after World War II. Proponents of international circulation of radioisotopes emphasized the political and scientific value of collaborating with European scientists, especially biomedical researchers. In the end, radioisotopes were shipped from the Commission’s Oak Ridge facility to many laboratories in England and continental Europe, where they were used in biochemical research on animals, plants, and microbes. However, the issue of radioisotope export continued to draw political fire in the United States, even after the establishment of national atomic energy facilities elsewhere. (shrink)

: The main contribution of this paper for social studies of scientific practice is to use and further elaborate the concept of experimental system. It is expanded from mere epistemic concerns to also incorporate the built-in practicality and societal relevance of scientific research. For this, an analysis of object construction by a potato-biotechnology research group is presented. The group's object of activity is conceptualized as a dual one comprising both the epistemic and applied objectives. The application object points to the (...) virus-resistant cultivated potato under construction, the epistemic object to the knowledge on the virus-resistance mechanism. Two major phases of the group's work are perceived as distinct experimental systems. The transition between them is analysed in terms of a gradual evolution characterised by network collaboration, ad hoc improvization, resistance, opportunism and informal interaction. (shrink)

From the mid-1960s onwards, a set of Spanish molecular biology research groups emerged in Spain. The factors contributing to this included: the return of a group of molecular biologists from their postdoctoral period abroad, the negotiations for the return of Spanish-born Nobel prize winner Severo Ochoa from New York, the negotiations for Spanish membership in the European Conference of Molecular Biology, and national policy towards university reform. As a result, the early molecular biologists’ research groups began to be recognised as (...) research schools by Spanish authorities and postgraduate courses and new research centres for molecular biology were set up. Foreign influence in the whole process was crucial. (shrink)

The discovery of RNA interference in 1998 has made a lasting impact on biological research. Identifying the regulatory role of small RNAs changed the modes of molecular biological inquiry as well as biologists' understanding of genetic regulation. This article examines the early years of small RNA biology's success story. I query which factors had to come together so that small RNA research came into life in the blink of an eye. I primarily look at scientific repertoires as facilitators of rapid (...) scientific change. I show that for a short period of time, between the years 1998 and 2002, different model organism communities, investigative strategies, technological innovations, and research interests could be successfully aligned to take small RNA research off the ground. I discuss how the keystone discoveries were situated in specific experimental traditions and what strategies were employed to establish these discoveries as more general phenomena. Providing thus a practice-based approach of rapid scientific change, I ask how to relate the change in propositional bits of scientific knowledge with changes in scientific practice. (shrink)

The aim of this paper is to discuss a key question in the history and philosophy of medicine, namely how scholars should treat the practices and experimental hypotheses of modern life science laboratories. The paper seeks to introduce some prominent historiographical methods and theoretical approaches associated with biomedical research. Although medical scientists need no convincing that experimentation has a significant function in their laboratory work, historians, philosophers, and sociologists long neglected its importance when examining changes in medical theories or progress (...) in scientific knowledge. The reason appears to have been the academic influence of the then dominant tradition in the history of ideas, but was also due to a misconception of what could usefully be termed the view on “historical ontology.” During the last two decades, there have been many books and research articles that have turned towards the subject, so that the study of experimental practice has become a major trend in the contemporary history and philosophy of medicine. A closer look at the issue of laboratory research shows that concepts in medicine and the life sciences cannot be understood as historically constant, free-standing ideas, but have to be regarded as dependent on local research settings. They often carry particular “social memories” with them and thus acquire important ethical implications. (shrink)

In 1948, a dynamic junior member of the Johns Hopkins Biology Department, William McElroy, became the first director of the McCollum—Pratt Institute for the Investigation of Micronutrient Elements. The Institute was founded at the university to further studies into the practicalities of animal nutrition. Ultimately, however, the Institute reflected McElroy's vision that all biological problems, including nutrition, could be best investigated through basic biochemical and enzymes studies. The Institute quickly became a hub of biochemical research over the following decade, producing (...) foundational work on metabolism and a respected series of symposia. In this paper, I argue that McElroy's biochemical vantage on biology also permeated the traditionally morphological and embryological Biology Department at Hopkins. Largely due to the activity of McElroy and the Institute, the faculty, course offerings, and research underwent a radical reorientation toward biochemistry and molecular biology in the 1950s, even while maintaining a commitment to developmental biology. While the history of postwar biology is often told as the ascendancy of the "new" biology over "traditional" biology, the case of McElroy and the McCollum—Pratt Institute affords an opportunity for historical examination of biochemical and molecular science as a lens through which all branches of biology at an institution were reconceived and unified. (shrink)

In 1971, Günter Blobel and David Sabatini proposed a novel and quite speculative schematic model to describe how proteins might reach the proper cellular location. According to their proposal, proteins destined to be secreted from the cell contain a “signal” to direct their release. Despite the fact that Blobel and Sabatini presented their signal hypothesis as a “beautiful idea” not grounded in experimental evidence, they received criticism from other scientists who opposed such speculation. Following the publication of the 1971 model, (...) Blobel persisted in conducting experiments and revising the model to incorporate new data. In fact, over the period of 1975–1984, Blobel and colleagues published five subsequent schematic models of the signal hypothesis, each revised based on new laboratory evidence. I propose that the original 1971 model can be viewed as an epistemic creation. Additionally, analysis of the subsequent schematic diagrams over the period of 1975–1984 allows one to track Blobel’s changing conception of an epistemic object over time. Furthermore, the entire series of schematic diagrams presented by Blobel from 1971 to 1984 allow one to visualize the initial conception and subsequent reworking of a scientific theory. In 1999, Blobel was awarded the Nobel Prize in Physiology or Medicine for his work on the signal hypothesis, which was ultimately supported by experimental evidence gathered after the speculative model was published. (shrink)

The Dutch microbiologist/biochemist Albert Jan Kluyver was an early proponent of the idea of biochemical unity, and how that concept might be demonstrated through the careful study of microbial life. The fundamental relatedness of living systems is an obvious correlate of the theory of evolution, and modern attempts to construct phylogenetic schemes support this relatedness through comparison of genomes. The approach of Kluyver and his scientific descendants predated the tools of modern molecular biology by decades. Kluyver himself is poorly recognized (...) today, yet his influence at the time was profound. Through lens of today however, it has been argued that the focus by Kluyver and others to create taxonomic and phylogenetic schemes using morphology and biochemistry distorted and hindered progress of the discipline of microbiology, because of a perception that the older approaches focused too much on a reductionist worldview. This essay argues that in contrast the careful characterization of fundamental microbial metabolism and physiology by Kluyver made many of the advances of the latter part of the twentieth century possible, by offering a framework which in many respects anticipated our current view of phylogeny, and by directly and indirectly training a generation of scientists who became leaders in the explosive growth of biotechnology. (shrink)