ORCID Profile
0000-0002-4872-6551
Current Organisation
Queensland University of Technology
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Publisher: Springer Science and Business Media LLC
Date: 20-06-2013
Publisher: SAGE Publications
Date: 22-09-2021
DOI: 10.1177/03010066211045172
Abstract: As face masks have become more commonplace in many regions due to COVID-19, concerns have been raised about their effects on the perception of mask wearers and social cohesion more broadly, including racial profiling. In two studies we examined the effects of masks on social judgments of mask wearers, and whether masks have different effects on judgments of Black and White faces. Participants rated 20 Black and 20 White faces with and without masks on trustworthiness/approachability (Studies 1 and 2) and on dominance/competence and attractiveness (Study 2). In both studies masks increased perceived trustworthiness and reduced the effect of face race on judgments. Masks also increased perceived attractiveness, but had no effect on the perception of dominance/competence. Overall, this study found no negative effects of face masks on judgments of mask wearers, though further research is needed.
Publisher: Microbiology Society
Date: 06-2013
Abstract: A Gram-negative, facultatively anaerobic bacillus, designated strain 266 T , was isolated from an irrigation water system in the south-west of Western Australia. Analysis of the 16S rRNA gene sequence confirmed that strain 266 T belonged to the genus Aeromonas , with the nearest species being Aeromonas fluvialis (99.6 % similarity to the type strain, with 6 nucleotide differences) followed by Aeromonas veronii and Aeromonas allosaccharophila (both 99.5 %). Analysis of gyrB and rpoD sequences suggested that strain 266 T formed a phylogenetic line independent of other species in the genus. This was confirmed using the concatenated sequences of six housekeeping genes ( gyrB , rpoD , recA , dnaJ , gyrA and dnaX ) that also indicated that A. veronii and A. allosaccharophila were the nearest relatives. DNA–DNA reassociation experiments and phenotypic analysis further supported the conclusion that strain 266 T represents a novel species, for which the name Aeromonas australiensis sp. nov. is proposed, with type strain 266 T ( = CECT 8023 T = LMG 2670 T ).
Publisher: Design Research Society
Date: 10-09-2020
Publisher: American Society for Microbiology
Date: 03-2015
DOI: 10.1128/JCM.03297-14
Abstract: Clostridium difficile PCR ribotype 033 (RT033) is found in the gastrointestinal tracts of production animals and, occasionally, humans. The illumi gene C. difficile assay (Meridian Bioscience, Inc.) failed to detect any of 52 C. difficile RT033 isolates, while all strains signaled positive for the binary toxin genes but were reported as negative for C. difficile by the Xpert C. difficile / Epi assay (Cepheid).
Publisher: American Society for Microbiology
Date: 31-12-2013
Abstract: In this work, we show that Clostridium difficile phage ϕC2 transduces erm (B), which confers erythromycin resistance, from a donor to a recipient strain at a frequency of 10 −6 per PFU. The transductants were lysogenic for ϕC2 and contained the erm (B) gene in a novel transposon, Tn 6215 . This element is 13,008 bp in length and contains 17 putative open reading frames (ORFs). It could also be transferred at a lower frequency by filter mating. IMPORTANCE Clostridium difficile is a major human pathogen that causes diarrhea that can be persistent and difficult to resolve using antibiotics. C. difficile is potentially zoonotic and has been detected in animals, food, and environmental s les. C. difficile genomes contain large portions of horizontally acquired genetic elements. The conjugative elements have been reasonably well studied, but transduction has not yet been demonstrated. Here, we show for the first time transduction as a mechanism for the transfer of a novel genetic element in C. difficile . Transduction may also be a useful tool for the genetic manipulation of C. difficile .
Publisher: Wiley
Date: 2015
DOI: 10.1016/J.FOB.2015.09.004
Abstract: A 14 kDa protein homologous to the γ‐ d ‐glutamyl‐ l ‐diamino acid endopeptidase members of the NlpC/P60 Superfamily has been described in Dermatophagoides pteronyssinus and Dermatophagoides farinae but it is not clear whether other species produce homologues. Bioinformatics revealed homologous genes in other Sarcopteformes mite species ( Psoroptes ovis and Blomia tropicalis ) but not in Tetranychus urticae and Metaseiulus occidentalis . The degrees of identity (similarity) between the D. pteronyssinus mature protein and those from D. farinae , P. ovis and B. tropicalis were 82% (96%), 77% (93%) and 61% (82%), respectively. Phylogenetic studies showed the mite proteins were monophyletic and shared a common ancestor with both actinomycetes and ascomycetes. The gene encoding the D. pteronyssinus protein was polymorphic and intronless in contrast to that reported for D. farinae . Homology studies suggest that the mite, ascomycete and actinomycete proteins are involved in the catalysis of stem peptide attached to peptidoglycan. The finding of a gene encoding a P60 family member in the D. pteronyssinus genome together with the presence of a bacterial promotor suggests an evolutionary link to one or more prokaryotic endosymbionts.
Publisher: American Society for Microbiology
Date: 07-2015
DOI: 10.1128/CMR.00127-14
Abstract: Clostridium difficile infection (CDI) is the leading cause of antimicrobial and health care-associated diarrhea in humans, presenting a significant burden to global health care systems. In the last 2 decades, PCR- and sequence-based techniques, particularly whole-genome sequencing (WGS), have significantly furthered our knowledge of the genetic ersity, evolution, epidemiology, and pathogenicity of this once enigmatic pathogen. C. difficile is taxonomically distinct from many other well-known clostridia, with a erse population structure comprising hundreds of strain types spread across at least 6 phylogenetic clades. The C. difficile species is defined by a large erse pangenome with extreme levels of evolutionary plasticity that has been shaped over long time periods by gene flux and recombination, often between ergent lineages. These evolutionary events are in response to environmental and anthropogenic activities and have led to the rapid emergence and worldwide dissemination of virulent clonal lineages. Moreover, genome analysis of large clinically relevant data sets has improved our understanding of CDI outbreaks, transmission, and recurrence. The epidemiology of CDI has changed dramatically over the last 15 years, and CDI may have a foodborne or zoonotic etiology. The WGS era promises to continue to redefine our view of this significant pathogen.
Publisher: Springer Science and Business Media LLC
Date: 24-05-2014
Publisher: MDPI AG
Date: 22-12-2021
DOI: 10.3390/SU14010076
Abstract: Industrial design is intrinsically linked to manufacturing however, what is required of industrial design to adapt to new changes brought on by Industry 4.0 in manufacturing is unknown. Current literature gives little insight into how industrial designers need to evolve to the current developments in manufacturing to remain value drivers in an Industry 4.0 paradigm. There is minimal research describing the link between industrial design, Industry 4.0 and the effect this will have on sustainability. We conducted an extensive survey of 190 respondents from 53 countries to establish the present state of industrial design practice globally and to better understand the priority sustainability is given by practicing industrial designers. Qualitative data showed a desire for improved sustainable processes however, quantitative data contradicted this, showing “sustainability” as one of the lowest ranked areas of importance in design practice for industrial designers. While sustainability—especially in manufacturing—demands more prominent change as industrial design adapts to an Industry 4.0 manufacturing paradigm, it seems that junior industrial designers do not currently see this as a priority.
No related grants have been discovered for Christoph Koch.