Determination of the activity of nitrifying bacteria in surface waters by a modified BOD-test. [Translation from: Zentbl.Bakt.Parasitkde 156(1) 414-421, 1972. ]

A modified method of the Biochemical oxygen demand (BOD)test was applied in order to find out the seasonal changing activity of the nitrifying bacteria in surface waters. Samples were taken from the River Elbe near Teufelsbrueck

Entrepreneurial cognition of the business model construct:A mixed methods study of stem and non-stem entrepreneurs

Applying the theory of socially situated cognition, we study how entrepreneurs cognitively process the business model construct during the early stages of launching technology-based new ventures. Through an abductive reasoning procedure, we aggregate four underlying socially situated cognitive functions of the business model and describe how these functions facilitate opportunity development. We examine if the entrepreneur’s educational background (STEM vs non-STEM) influences their cognitive processing of the construct. We discuss the contribution of our study to the literature on managerial cognition, business models, and to practice in detail

"Yes and. . ., but wait. . ., heck no!":A socially situated cognitive approach towards understanding how startup entrepreneurs process critical feedback

We examine sensebreaking, a meaning void, that entrepreneurs experience due to critical feedback from early stakeholders using the socially situated cognition perspective. We show that sensebreaking aids novel sensemaking via three mechanisms-redirecting, reframing, and questioning-through longitudinal analysis of weekly diary reports that we collected from 30 entrepreneurs for one year. We describe the cognitive changes due to novel sensemaking. We derive a process model that illustrates how sensebreaking-sensemaking iterations over time effect changes to the shared cognition between entrepreneurs and their stakeholders while driving opportunity development. We advance the opportunity coconstruction literature by adding microlevel understanding of stakeholder interactions and explicating their effects on entrepreneurial cognition

Entrepreneurial cognition of the business model construct:A mixed methods study of stem and non-stem entrepreneurs

Applying the theory of socially situated cognition, we study how entrepreneurs cognitively process the business model construct during the early stages of launching technology-based new ventures. Through an abductive reasoning procedure, we aggregate four underlying socially situated cognitive functions of the business model and describe how these functions facilitate opportunity development. We examine if the entrepreneur’s educational background (STEM vs non-STEM) influences their cognitive processing of the construct. We discuss the contribution of our study to the literature on managerial cognition, business models, and to practice in detail

Entrepreneurial cognition of the business model construct:A mixed methods study of stem and non-stem entrepreneurs

Applying the theory of socially situated cognition, we study how entrepreneurs cognitively process the business model construct during the early stages of launching technology-based new ventures. Through an abductive reasoning procedure, we aggregate four underlying socially situated cognitive functions of the business model and describe how these functions facilitate opportunity development. We examine if the entrepreneur’s educational background (STEM vs non-STEM) influences their cognitive processing of the construct. We discuss the contribution of our study to the literature on managerial cognition, business models, and to practice in detail

Waiting list mortality and the potential of donation after circulatory death heart transplantations in the Netherlands

BACKGROUND: With more patients qualifying for heart transplantation (HT) and fewer hearts being transplanted, it is vital to look for other options. To date, only organs from brain-dead donors have been used for HT in the Netherlands. We investigated waiting list mortality in all Dutch HT centres and the potential of donation after circulatory death (DCD) HT in the Netherlands. METHODS: Two different cohorts were evaluated. One cohort was defined as patients who were newly listed or were already on the waiting list for HT between January 2013 and December 2017. Follow-up continued until September 2018 and waiting list mortality was calculated. A second cohort of all DCD donors in the Netherlands (lung, liver, kidney and pancreas) between January 2013 and December 2017 was used to calculate the potential of DCD HT. RESULTS: Out of 395 patients on the waiting list for HT, 196 (50%) received transplants after a median waiting time of 2.6 years. In total, 15% died while on the waiting list before a suitable donor heart became available. We identified 1006 DCD donors. After applying exclusion criteria and an age limit of 50 years, 122 potential heart donors remained. This number increased to 220 when the age limit was extended to 57 years. CONCLUSION: Waiting list mortality in the Netherlands is high. HT using organs from DCD donors has great potential in the Netherlands and could lead to a reduction in waiting list mortality. Cardiac screening will eventually determine the true potential