Inspired by the swarming behavior of various bacteria in nature, light-driven micromotor with collective behavior has attracted a great deal of attention, which will be a valuable tool to understand ...the cooperation and communication between bacterial populations and will contribute to the creation of reconfigurable microrobots and the cooperative transportation of large cargoes. However, it is still challenging to modulate the micromotors' collective behavior based on local interaction and communication. Herein, we develop a light-powered BiVO.sub.4-based micromotor with self-propulsion and dynamic 'predator-bait' collective behavior, which is based on the photocatalytic reaction of BiVO.sub.4. The BiVO.sub.4-based micromotor has great potential in the field of organic pollutant degradation with enhanced apparent rate constant (0.076 min.sup.-1) which originates from the dynamic 'predator-bait' behavior.
Ronald Breslow (1931–2017) Schepartz, Alanna; Bergman, Robert; Grubbs, Robert H.
Angewandte Chemie International Edition,
January 2, 2018, 2018-Jan-02, 2018-01-02, 20180102, Letnik:
57, Številka:
1
Journal Article
Recenzirano
Ronald Breslow, Samuel Latham Mitchill Professor of Chemistry at Columbia University, passed away on October 25, 2017, at the age of 86. Breslow made remarkable contributions to the fields of ...physical‐organic and bioorganic chemistry, including biological and biomimetic transformations, and the use of molecular recognition to control reaction selectivity.
Correction for 'Assessing dimerisation degree and cooperativity in a biomimetic small-molecule model by pulsed EPR' by K. Ackermann
et al.
,
Chem. Commun.
, 2015,
51
, 5257-5260.
Bions sub-cultures were incubated in cell culture conditions for 2 weeks and the amount of bions was monitored by light absorbance. Bions were retrieved by centrifugation, followed by washing steps ...and preparation for EDX analysis.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Fe sub(2)(CO) sub(4)( mu -dppf)( mu -pdt) catalyses the conversion of protons and electrons into hydrogen and also the reverse reaction thus mimicing both types of binuclear hydrogenase enzymes.
Inspired from nature, such as lotus leaf, showing excellent superhydrophobicity, a lot of biomimetic superhydrophobic surfaces were recently fabricated by means of various smart and easy routes, such ...as wet chemical reaction, self-assembly, electrospinning. At the same time, many examples, such as lotus effect, clearly tell us that biomimicry is dissimilar to a simple copying or duplicating of biological structures. This review highlighted some of the recent advances in recent years, especially in last four years, on superhydrophobic surfaces, from natural to biomimetic surfaces and their functions. We also proposed the promising routes from biomimetic superhydrophobic surfaces in the further.
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► The state of the art on superhydrophobic surfaces. ► Lessons from nature to biomimetic surfaces. ► From multiple functions to applications. ► Future direction on biomimetic superhydrophobic surfaces. ► Work as nature, do as nature and produce as nature.
Nature is the creation of aesthetic functional systems, in which many natural materials have vagarious structures. Inspired from nature, such as lotus leaf, butterfly’ wings, showing excellent superhydrophobicity, scientists have recently fabricated a lot of biomimetic superhydrophobic surfaces by virtue of various smart and easy routes. Whilst, many examples, such as lotus effect, clearly tell us that biomimicry is dissimilar to a simple copying or duplicating of biological structures. In this feature article, we review the recent studies in both natural superhydrophobic surfaces and biomimetic superhydrophobic surfaces, and highlight some of the recent advances in the last four years, including the various smart routes to construct rough surfaces, and a lot of chemical modifications which lead to superhydrophobicity. We also review their functions and applications to date. Finally, the promising routes from biomimetic superhydrophobic surfaces in the next are proposed.
Although biomimetic designs are expected to play a key role in exploring future structural materials, facile fabrication of bulk biomimetic materials under ambient conditions remains a major ...challenge. Here, we describe a mesoscale "assembly-and-mineralization" approach inspired by the natural process in mollusks to fabricate bulk synthetic nacre that highly resembles both the chemical composition and the hierarchical structure of natural nacre. The millimeter-thick synthetic nacre consists of alternating organic layers and aragonite platelet layers (91 weight percent) and exhibits good ultimate strength and fracture toughness. This predesigned matrix-directed mineralization method represents a rational strategy for the preparation of robust composite materials with hierarchically ordered structures, where various constituents are adaptable, including brittle and heat-labile materials.
Immunotherapy has shown encouraging results in various cancers, but the response rates are relatively low due to the complex tumor immunosuppressive microenvironment (TIME). The presence of ...tumor‐associated macrophages (TAMs) and tumor hypoxia correlates significantly with potent immunosuppressive activity. Here, a hemoglobin–poly(ε‐caprolactone) (Hb–PCL) conjugate self‐assembled biomimetic nano red blood cell (nano‐RBC) system (V(Hb)) is engineered to deliver chemotherapeutic doxorubicin (DOX) and oxygen for reprogramming TIME. The Hb moiety of V(Hb)@DOX can bind to endogenous plasma haptoglobin (Hp) and specifically target the M2‐type TAMs via the CD163 surface receptor, and effectively kill the cells. In addition, the O2 released by the Hb alleviates tumor hypoxia, which further augments the antitumor immune response by recruiting fewer M2‐type macrophages. TAM‐targeting depletion and hypoxia alleviation synergistically reprogram the TIME, which concurrently downregulate PD‐L1 expression of tumor cells, decrease the levels of immunosuppressive cytokines such as IL‐10 and TGF‐β, elevate the immunostimulatory IFN‐γ, enhance cytotoxic T lymphocyte (CTL) response, and boost a strong memory response. The ensuing TAM‐targeted chemo‐immunotherapeutic effects markedly inhibit tumor metastasis and recurrence. Taken together, the engineered endogenous TAM‐targeted biomimetic nano‐RBC system is a highly promising tool to reprogram TIME for cancer chemo‐immunotherapy.
An endogenous tumor‐associated macrophage (TAM)‐targeted biomimetic nano red blood cell (nano‐RBC) system is engineered via self‐assembly of a hemoglobin–poly(ε‐caprolactone) (Hb–PCL) conjugate for enhanced cancer chemo‐immunotherapy. The doxorubicin (DOX)‐loaded nano‐RBC (V(Hb)@DOX) can innately target to decrease the number of immunosuppressive TAMs. Moreover, the O2 released from nano‐RBC relieves tumor hypoxia, which further reprograms the immunosuppressive state to stimulate antitumor responses. The synergistic chemo‐immunotherapy effectively suppresses tumor growth, inhibits metastasis, and prevents autologous tumor recurrence.
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