Blockchain technology, popularized by Bitcoin cryptocurrency, is characterized as an open-source, decentralized, distributed database for storing transaction information. Rather than relying on centralized intermediaries (e.g., banks) this technology allows two parties to transact directly using duplicate, linked ledgers called blockchains. This makes transactions considerably more transparent than those provided by centralized systems. As a result, transactions are executed without relying on explicit trust [of a third party], but on the distributed trust based on the consensus of the network (i.e., other blockchain users). Applying this technology to improve supply chain transparency has many possibilities. Every product has a long and storied history. However, much of this history is presently obscured. Often, when negative practices are exposed, they quickly escalate to scandalous, and financially crippling proportions. There are many recent examples, such as the exposure of child labor upstream in the manufacturing process and the unethical use of rainforest resources. Blockchain may bring supply chain transparency to a new level, but presently academic and managerial adoption of blockchain technologies is limited by our understanding. To address this issue, this research uses the Unified Theory of Acceptance and Use of Technology (UTAUT) and the concept of technology innovation adoption as a foundational framework for supply chain traceability. A conceptual model is developed and the research culminates with supply chain implications of blockchain that are inspired by theory and literature review.

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The influence of sporulation temperature (20, 30 and 37 degrees C) on the heat resistance and initiation of germination and inactivation by high pressure on Bacillus cereus ATCC 14579 spores was investigated. Spores sporulated at 37 degrees C were the most heat-resistant. However, spores sporulated at 20 degrees C were more resistant to the initiation of germination and inactivation by high pressure. Spores were more sensitive to pressure at higher treatment temperatures. At 25 degrees C, there was an optimum pressure (250 MPa) for the initiation of germination for the three suspensions; at higher temperatures an increase of pressure up to 690 MPa caused progressively more germination. Resistance to the germinability and inactivation by high pressure of the spore population was distributed heterogeneously. Semilogarithmic curves of the ungerminated and survival fraction of B. cereus spores were concave. The resistant fraction of the spore population was lower at higher treatment temperatures. At 60 degrees C after 30 s of treatment at 690 MPa almost 5 log cycles of the population of B. cereus sporulated at 20 degrees C was germinated, and more than 7 log cycles of the population of B. cereus sporulated at 30 and 37 degrees C. The same treatment inactivated 4, 6 and 7 log cycles of the population of B. cereus sporulated at 20, 30 and 37 degrees C, respectively.

Purpose This paper aims to review logistics and supply chain management topics where theories have been applied to better understand the supply chain management (SCM) discipline identity. The purpose is threefold: to identify research topics in logistics and supply chain management where one or more theories have been examined; provide commentary on the theories that have been applied to the various logistics and SCM research topics; and to provide reference material and direction for future research. Design/methodology/approach This structured literature review (SLR) examines research papers in logistics and SCM from 1991 to 2015 published in eight leading academic journals. Papers in the data set are grouped by topic and further analyzed in terms of research method, purpose, year and journal. Findings This research categorizes papers by the topics that were studied to understand important insights about how these topics have been examined by researchers. Within each topic area, theories that researchers have used to investigate the topics are identified. This method exposes insights such as: how topics have evolved over time, which topics have lost prominence, which topics may be particularly promising for future research and how topics are treated in the literature. Originality/value Despite multiple calls for clarification regarding how theory has been used in logistics and SCM, the logistics and SCM disciplines continue to grow without adequate research on how theory has been used to examine SCM topics. This SLR therefore provides a broad compilation of logistics and SCM research that uses named theories and that is organized by SCM topic to better understand the SCM discipline.

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