Marinobacter sp. W1-16 from Antarctic surface seawater was analysed for the production of extracellular polymeric substances (EPSs). Enhancement of the EPS biosynthesis was carried out by evaluating the influences of the carbon source (type and concentration), temperature, pH and salinity. EPS yields varied strongly depending on sugar substrate and temperature, while pH and salinity did not strongly affect levels of EPS production. Marinobacter sp. W1-16 produced the highest quantity of EPSs when growing at 15°C and pH 8, in the presence of 2% glucose and 3% NaCl. The EPS chemical characterization revealed a molecular weight of about 260 kDa. Colorimetric assays determined a higher quantity of carbohydrate than of proteins and uronic acids, as well as the presence of sulphate, in the extracted EPSs. The monosaccharidic composition resulted in Glc:Man:Gal:GalN:GalA:GlcA in relative molar proportions of 1:0.9:0.2:0.1:0.1:0.01. Some biotechnological potentialities (i.e. emulsifying and cryoprotective actions, and heavy metal binding properties) of the EPSs were proved, suggesting possible industrial and bioremediation applications.

Bioprospecting is the search for valuable products from natural sources. Given that most species are poorly known, a key question is where to search. Ethnodirected bioprospecting approaches use traditional knowledge in the process of selecting plants to screen for desired properties. A complementary approach is to utilize phylogenetic analyses based on traditional uses or known chemistry to identify lineages in which desired properties are most likely to be found. Novel discoveries of plant bioactivity from these approaches can aid the development of treatments for diseases with unmet medical needs. For example, neurological disorders are a growing concern, and psychoactive plants used in traditional medicine may provide botanical sources for bioactivity relevant for treating diseases related to the brain and nervous system. However, no systematic study has explored the diversity and phylogenetic distribution of psychoactive plants. We compiled a database of 501 psychoactive plant species and their properties from published sources. We mapped these plant attributes on a phylogenetic tree of all land plant genera and showed that psychoactive properties are not randomly distributed on the phylogeny of land plants; instead certain plant lineages show overabundance of psychoactive properties. Furthermore, employing a ‘hot nodes’ approach to identify these lineages, we can narrow down our search for novel psychoactive plants to 8.5% of all plant genera for psychoactivity in general and 1–4% for specific categories of psychoactivity investigated. Our results showcase the potential of using a phylogenetic approach to bioprospect plants for psychoactivity and can serve as foundation for future investigations.

Early modern Russia sat at the intersection of Eurasian trade networks, which allowed both commodities and information to move from east to west and north to south. Rhubarb exported from China had held a prominent position in Western medical treatments since the classical era, but improved transportation and communication between Europe and Asia through Russia enabled the growth of the medicinal rhubarb trade to unexpected heights after 1760. Earlier studies of rhubarb have focused on European interests in uncovering ‘true’ medicinal rhubarb, but this article will situate the plant as a part of the broader process of scientific exchange across Eurasia. Russia’s unique position in Eurasia ultimately allowed its specialists to contribute to the development of Western science through the importation of information from Asia and its own expeditions in Siberia, Russia’s internal ‘Asian’ territory.

This review uses a multidisciplinary approach to investigate legal issues concerning the oceans and human health. It firstly seeks to define the boundaries of oceans and human health research. We use three case studies as examples: biomedical research, marine litter and human well-being. Biomedical research raises complex issues relating to coastal states’ sovereign rights to exploit their marine resources and the patenting processes. Coastal states have differing degrees of control over research at sea. There are differences in EU and US law over the status of genetic discoveries, with the US having stricter criteria to qualify for patent protection. International law sets the standard for bioprospecting in developing countries under the Nagoya Protocol. The cost and complexity of marine biomedical research mean that it cannot be left to commercial exploration and needs some public funding. The second case study highlights the rise in marine plastics pollution using Marine Conservation Society beachwatch data. It details the need to alter product design to avoid marine pollution and records an unsuccessful attempt by academics and an NGO to make contact with the manufacturers of one polluting product. It also introduces the concept that faulty design could amount to a public nuisance. The third case study highlights the potential health benefits from access to the coast and the statutory responsibility which sits with the US and UK authorities in the provision of well-being. It posits that there needs to be greater inter-agency coordination to promote access to the coast for human well-being.

Examining the rise and fall of a public–private marine biotechnological enterprise in Hawaii, this article analyses how promises to make products and profits from marine microbes in archipelagic waters drew upon peculiarly American sentiments about the sea as a politically uncontested treasure-chest of biodiversity. I argue that attention to the material process by which lab and legal instruments are calibrated to one another to generate biotech exchange-value must be joined by consideration of how scientists and their interlocutors imagine the meaning of biology—as discipline and as corporeal substance and process. Without such symbolic analysis, theorizations of biocapital remain incomplete. To discuss the genre of capitalism evidenced in marine biotechnological endeavors in Hawaii, I develop the concept of blue-green capitalism, where blue stands for a vision of the freedom of the open ocean and for speculative sky-high promise, and green for belief in ecological sustainability as well as biological fecundity. I show that this vision, dominant in industry–university settings, ran into direct conflict with Native Hawaiian legal epistemologies of the sea.

Biodiversity loss raises some of the most difficult issues of equity in international environmental law. Differential obligations have been developed as a means of enabling developed and developing countries to participate in the Biodiversity Convention. This article contends that the actual practices of these obligations have been cast narrowly, reinforce the existing politics and economics of biodiversity conservation, and are difficult to see and practise. They have been predominantly understood as obliging the transfer of funds and technology between states and as implicitly encouraging technology-based development pathways. The article calls for differential obligations to be reworked in environmental justice terms to encompass plural, alternative development pathways, such as creating local economies. It proposes that emerging market-based, community initiatives and the ecological footprint concept could help to provide ways to make differential obligations more workable.