Run-and-tumble motility is widely used by swimming microorganisms including numerous prokaryotic and eukaryotic organisms. Here, we experimentally investigate the run-and-tumble dynamics of the bacterium E. coli in polymeric solutions. We find that even small amounts of polymer in solution can drastically change E. coli dynamics: cells tumble less and their velocity increases, leading to an enh...

The combined effect of tumbling marination methods (vacuum continuous tumbling marination, CT; vacuum intermittent tumbling marination, IT) and effective tumbling time (4, 6, 8, and 10 h) on the water status and protein properties of prepared pork chops was investigated. Results showed that regardless of tumbling time, CT method significantly decreased the muscle fiber diameter (MD) and signifi...

This study compared the effects of exposure duration on letter and grating targets in a visual acuity (VA) task and determined if the broadband nature of letters accounts for their temporal summation characteristics. Log MAR (minimum angle of resolution) VA of five individuals (ages 25-36) was measured with a set of tumbling E optotypes for durations of 24 ms to 1s. The Es were either unfiltere...

Background: Low vision and blindness have significant implications, resulting in a generally reduced quality of life amongst the sufferers. Aim: To determine prevalence causes low learners at Akropong School for Blind. Setting: The study was conducted Blind, Ghana. Methods: A cross-sectional design used. Eye examinations included measurements presenting distance visual acuity (PDVA) with Tumbli...

We predict that the average size of persistence-induced clusters formed by run-and-tumble bacteria in narrow channels increases when tumbling rates are more diverse. The effect may be strong for E. coli and present throughout active matter.

There are currently no studies on visual impairment and sarcopenia. We investigated the cross-sectional association between objectively measured far vision sarcopenia in a nationally representative sample of older adults aged 65 years over from six low- middle-income countries (LMICs). Cross-sectional, community-based data study global ageing adult health (SAGE) were analyzed. Far acuity was us...

To study the swimming of the multi-flagellated bacterium Escherichia coli, we deploy a bead-spring hydrodynamic model (Watari and Larson 2010), whose body and flagellar geometry, motor torques, and motor reversals are adjusted to match the experimental observations of the Berg group (Turner et al. 2000; Darnton et al. 2007) during both running and tumbling of the bacterium. In this model, hydro...

Purpose. To determine the prevalence, causes, and associations of visual impairment (VI) among participants aged 60 years or older in a rural community in China. Methods. A community-based survey was undertaken in a rural town located in Eastern China and 4579 people aged 60 years or older participated in the study. Presenting visual acuity was assessed using a Snellen chart with tumbling-E opt...