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Microorganismal motility is often characterized by complex responses to environmental physico-chemical stimuli. Although the biological basis of these responses is often not well understood, their exploitation already promises novel avenues to directly control the motion of living active matter at both the individual and collective level. Here we leverage the phototactic ability of the model microalga Chlamydomonas reinhardtii to precisely control the timing and position of localized cell photoaccumulation, leading to the controlled development of isolated bioconvective plumes. This novel form of photobioconvection allows a precise, fast, and reconfigurable control of the spatiotemporal dynamics of the instability and the ensuing global recirculation, which can be activated and stopped in real time. A simple continuum model accounts for the phototactic response of the suspension and demonstrates how the spatiotemporal dynamics of the illumination field can be used as a simple external switch to produce efficient bio mixing.
This article was published in the following journal.
Name: Physical review letters
Hydatidiform moles are known to pose an extremely high risk of severe early-onset preeclampsia if left untreated. TNF superfamily cytokine, LIGHT has recently been reported to contribute to pathophysi...
We have constructed a new approach to realize the light extraction enhancement in organic light-emitting diodes (OLEDs) by using FeO@Au nanoparticles (FOA NPs). The current efficiency of 97.8 cd/A at...
A new nucleus-localized singlet oxygen generator was designed and synthesized. Its capability to label nucleus-localized biomolecules through spatially-restricted oxidation under visible light was val...
Formation of light bullets-tightly localized in space and time light packets, retaining their spatiotemporal shape during propagation-is, for the first time, experimentally observed and investigated i...
An engineering tool for controlling flux distribution on metabolic pathways to an appropriate state is highly desirable in bio-production. An optogenetic switch, which regulates gene expression by lig...
Surgical pain may require significant amount of opioids. This is a serious medical problem, especially in the elderly. New methods are needed to help control surgical pain. This study inve...
The purpose of this study is to determine whether red light therapy using LED 650nm red light for body contouring of the waist, hips and thighs is as effective as red light therapy using L...
To assess by MR Imaging the lesions induced by WST09-mediated photodynamic therapy (PDT) in patients with recurrent or persistent localized prostate cancer following definitive radiotherap...
This study is designed to investigate whether light therapy may be an effective treatment for some people with epilepsy. Light treatment is already an established treatment for depression....
Prospective and multicentric Phase III study, evaluation of the interest of the radiotherapy after 4 or 6 cycles of CHOP 14 R regimen of chemotherapy , patients with agressive and localiz...
Treatment using irradiation with light of low power intensity so that the effects are a response to the light and not due to heat. A variety of light sources, especially low-power lasers are used.
The adjustment of the eye to variations in the intensity of light. Light adaptation is the adjustment of the eye when the light threshold is increased; DARK ADAPTATION when the light is greatly reduced. (From Cline et al., Dictionary of Visual Science, 4th ed)
Excessive pigmentation of the skin, usually as a result of increased epidermal or dermal melanin pigmentation, hypermelanosis. Hyperpigmentation can be localized or generalized. The condition may arise from exposure to light, chemicals or other substances, or from a primary metabolic imbalance.
An enzyme that phosphorylates myosin light chains in the presence of ATP to yield myosin-light chain phosphate and ADP, and requires calcium and CALMODULIN. The 20-kDa light chain is phosphorylated more rapidly than any other acceptor, but light chains from other myosins and myosin itself can act as acceptors. The enzyme plays a central role in the regulation of smooth muscle contraction.
Agents that emit light after excitation by light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags.
Biological therapy involves the use of living organisms, substances derived from living organisms, or laboratory-produced versions of such substances to treat disease. Some biological therapies for cancer use vaccines or bacteria to stimulate the body&rs...