Author Correction: Non-Invasive Imaging Through Scattering Medium by Using a Reverse Response Wavefront Shaping Technique.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Cusp-artifacts in high order superresolution optical fluctuation imaging.

Superresolution optical fluctuation imaging (SOFI) is a simple and affordable super-resolution imaging technique, and attracted a growing community over the past decade. However, the theoretical resolution enhancement of high order SOFI is still not fulfilled. In this study, we identify "cusp artifacts" in high order SOFI images, and show that the high-order cumulants, odd-order moments and balanced-cumulants (bSOFI) are highly vulnerable to cusp artifacts.

Generation and Manipulation of Superoscillatory Hotspots Using Virtual Fourier Filtering and CTF Shaping.

Superoscillation is a technique that is used to produce a spot of light (known as 'hotspot') which is smaller than the conventional diffraction limit of a lens and even smaller than the optical wavelength. Over the past few years, several techniques have been realized for the generation of the superoscillatory hotspot. In this article, for the first time to the best of our knowledge, we propose a novel and a more efficient technique for producing superoscillation in microscopic imaging by shaping the Coherent Transfer Function (CTF) of a lens via virtual Fourier filtering followed by a phase retrieval algorithm.

Investigation of heterogeneous sulfonated graphene oxide to hydrolyze cellulose and produce dark fermentative biohydrogen using Enterobacter aerogenes.

The main aim of this work was investigating the potential of sulfonated graphene oxide (sGO) for hydrolysis of cellulosic substrates and dark fermentative hydrogen production from obtained hydrolysates using E. aerogenes. Sulfonation of graphene oxide was performed using chlorosulfonic acid which showed a high acid density of 4.

Microcavity Enhanced Raman Spectroscopy of Fullerene C Bucky Balls.

Raman spectroscopy is a widely used characterization technique in material science. It is a non-destructive tool with relatively simple instrumentation, and provides intrinsic qualitative information of analytes by probing their vibrational modes. In many cases, Raman enhancement is essential for detecting low-intensity signals in high-noise environments, spectrally unresolved features, and hidden modes.

The Complexity of the Holobiont in the Red Sea Coral under Heat Stress.

The recognition of the microbiota complexity and their role in the evolution of their host is leading to the popularization of the holobiont concept. However, the coral holobiont (host and its microbiota) is still enigmatic and unclear. Here, we explore the complex relations between different holobiont members of a mesophotic coral .

Cooperative crystallization effect in the formation of sonochemically grafted active materials based on polysaccharides.

The current study explores the formation of active eco-friendly materials capable of preventing microbial contamination using in situ ultrasonic grafting of vanillin, curcumin and a curcumin-vanillin mixture on the surfaces of carboxymethylcellulose (CMC) and chitosan films. Spectroscopic, microscopic, physical and mechanical studies revealed that the films grafted with curcumin-vanillin mixture demonstrate improved mechanical properties and higher degree of order. The bioactivity of the prepared films was tested on food model, fresh-cut melons and films with a deposited curcumin-vanillin mixture showed superior antibacterial properties.

Microfluidic-based linear-optics label-free imager.

Linear optics based nanoscopy previously reached resolution beyond the diffraction limit, illuminating samples in the visible light regime while allowing light to interact with freely moving metallic nanoparticles. However, the hydrodynamics governing the nanoparticle motion used to scan the sample is very complex and has low probability of achieving appropriate and fast mapping in practice. Hence, an implementation of the technique on real biological samples has not been demonstrated so far.

Sensitive Readout for Microfluidic High-Throughput Applications using Scanning SQUID Microscopy.

Microfluidic chips provide a powerful platform for high-throughput screening of diverse biophysical systems. The most prevalent detection methods are fluorescence based. Developing new readout techniques for microfluidics focusing on quantitative information in the low signal regime is desirable.

A non-enzymatic sensor based on three-dimensional graphene foam decorated with Cu-xCuO nanoparticles for electrochemical detection of glucose and its application in human serum.

In the present study, a porous structure consisting of three-dimensional graphene (3DG) decorated with Cu-based nanoparticles (NPs) (Cu or Cu-CuO) was synthesized in order to develop an enzyme-free electrochemical glucose sensor. Moreover, the effects of Cu-based nanoparticle concentrations on electrochemical properties and glucose detection were evaluated by cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry. Cu-based NPs@3DG showed markedly better electrochemical performance in glucose oxidation in alkaline solution compared to 3DG foam.

Cortical Interactions between Prosthetic and Natural Vision.

Outer retinal degenerative diseases, such as retinitis pigmentosa (RP) and age-related macular degeneration (AMD), are among the leading causes of incurable blindness in the Western world [1]. Retinal prostheses have been shown to restore some useful vision by electrically stimulating the remaining retinal neurons [2]. In contrast to inherited retinal degenerative diseases (e.

SIRT6 Promotes Hepatic Beta-Oxidation via Activation of PPARα.

The pro-longevity enzyme SIRT6 regulates various metabolic pathways. Gene expression analyses in SIRT6 heterozygotic mice identify significant decreases in PPARα signaling, known to regulate multiple metabolic pathways. SIRT6 binds PPARα and its response element within promoter regions and activates gene transcription.

Nanocompartmentalization of the Nuclear Pore Lumen.

The nuclear pore complex (NPC) employs the intrinsically disordered regions (IDRs) from a family of phenylalanine-glycine-rich nucleoporins (FG-Nups) to control nucleocytoplasmic transport. It has been a long-standing mystery how the IDR-mediated mass exchange can be rapid yet selective. Here, we use a computational microscope to show that nanocompartmentalization of IDR subdomains leads to a remarkably elaborate gating structure as programmed by the amino acid sequences.

Antibacterial Activity Against Methicillin-Resistant of Colloidal Polydopamine Prepared by Carbon Dot Stimulated Polymerization of Dopamine.

A simple one-step process for the polymerization of dopamine has been developed using nitrogen-doped carbon dots (N@C-dots) as the sole initiator. The synthesized amorphous polydopamine (PDA)-doped N@C-dots (PDA-N@C-dots composite) exhibited a negative charge of -39 mV with particle sizes ranging from 200 to 1700 nm. The stable colloidal solution was active against methicillin-resistant (MRSA), a Gram-negative bacterium.

TiO nanotubes/reduced GO nanoparticles for sensitive detection of breast cancer cells and photothermal performance.

In this study, we developed a simple and cost effective aptasensor based on TiO nanotubes-reduced graphene oxide (TiO nanotube-rGO) linked to MUC1 aptamers for ultrasensitive electrochemical detection of breast cancer cell (MCF-7). Moreover, the photothermal performance of nanohybrid TiO-rGO was investigated for cancer treatment. In this regard, after synthesize of TiO nanotubes via anodization process, TiO nanotubes-rGO hybrid was synthesized by UV assisted reduction of GO and subsequent TiO nanotubes attachment to rGO sheets.

Sonochemical preparation of polyaniline@TiO and polyaniline@SiO for the removal of anionic and cationic dyes.

Polyaniline (PANI) synthesized by simple CDs (carbon dots) initiated polymerization has formed a composite with TiO and SiO, respectively via a sonochemical method. These PANI@TiO and PANI@SiO composites were proven as effective adsorbent materials to rapidly adsorb the anionic and cationic dyes from wastewater at neutral pH and ambient temperature. Selected popular cationic and anionic organic dyes consisted of methylene blue (MB), brilliant blue (BB), Evans blue (EB), crystal violet (CV), Congo red (CR), rhodamine B (RB), and rhodamine 6G (R6G).

Interfacing the Cell with "Biomimetic Membrane Proteins".

Integral membrane proteins mediate a myriad of cellular processes and are the target of many therapeutic drugs. Enhancement and extension of the functional scope of membrane proteins can be realized by membrane incorporation of engineered nanoparticles designed for specific diagnostic and therapeutic applications. In contrast to hydrophobic insertion of small amphiphilic molecules, delivery and membrane incorporation of particles on the nanometric scale poses a crucial barrier for technological development.

Preparation of cell culture scaffolds using polycaprolactone/quince seed mucilage.

In the present study, the polymer obtained from Cydonia oblonga Miller seeds (quince seed mucilage (QSM)) in combination with polycaprolactone (PCL) was used for producing hybrid electrospun scaffolds as three-dimensional (3D) cell culture platforms. Various PCL/QSM ratios were tested to obtain a uniform product with an appropriate mean fiber diameter for cell growth. The chemical structures of the scaffolds were studied by FT-IR spectroscopy and their crystallinity was investigated by XRD.

Ratiometric widefield imaging with spectrally balanced detection.

Ratiometric imaging is an invaluable tool for quantitative microscopy, allowing for robust detection of FRET, anisotropy, and spectral shifts of nano-scale optical probes in response to local physical and chemical variations such as local pH, ion composition, and electric potential. In this paper, we propose and demonstrate a scheme for widefield ratiometric imaging that allows for continuous tuning of the cutoff wavelength between its two spectral channels. This scheme is based on angle-tuning the image splitting dichroic beamsplitter, similar to previous works on tunable interference filters.

High-resolution VSDI retinotopic mapping via a DLP-based projection system.

High-resolution recording of visual cortex activity is an important tool for vision research. Using a customized digital mirror device (DMD) - based system equipped with retinal imaging, we projected visual stimuli directly on the rat retina and recorded cortical responses by voltage-sensitive dye imaging. We obtained robust cortical responses and generated high-resolution retinotopic maps at an unprecedented retinal resolution of 4.

Antibacterial magnetic nanoparticles for therapeutics: a review.

Along with the extensive range of exotic nanoparticle (NPs) applications, investigation of magnetic NPs (MNPs) has ushered modern antibacterial studies into an increasingly attractive research area. A great number of microorganisms exist in the size scales from nanometre to micrometre regions. The enormous potential of engineered MNPs in therapeutic procedures against various drug-resistant bacteria has declined the menace of fatal bacterial infections.

Simultaneous laser-induced synthesis and micro-patterning of a metal organic framework.

Micro-patterning of a metal organic framework (MOF) from a solution of precursors is achieved by local laser heating. Nano-sized MOFs are formed, followed by rapid assembly due to convective flows around a heat-induced micro-bubble. This laser-induced bottom-up technique is the first to suggest simultaneous synthesis and micro-patterning of MOFs, alleviating the need for pre-preparation and stabilization.

Sonication-Assisted Synthesis of Bimetallic Hg/Pd Alloy Nanoparticles for Catalytic Reduction of Nitrophenol and its Derivatives.

In this article, we report a facile approach for the synthesis of an inexpensive catalyst of bimetallic Hg/Pd alloys comprising nanoparticles with various structures using a unique ultrasonic reaction that is conducted without the use of any reducing agent. The nanoparticles of Hg/Pd alloys (HgPd and HgPd) were achieved for the first time by sonicating an aqueous solution of Palladium (II) nitrate with metallic liquid mercury, as evidenced by XRD. EDS further confirmed the presence of Pd and Hg elements in the alloy.

Quantification of porosity in extensively nanoporous thin films in contact with gases and liquids.

Nanoporous layers are widely spread in nature and among artificial devices. However, complex characterization of extensively nanoporous thin films showing porosity-dependent softening lacks consistency and reliability when using different analytical techniques. We introduce herein, a facile and precise method of such complex characterization by multi-harmonic QCM-D (Quartz Crystal Microbalance with Dissipation Monitoring) measurements performed both in the air and liquids (Au-Zn alloy was used as a typical example).

Drag controlled formation of polymeric colloids with optical traps.

Optical trapping is a powerful optical manipulation technique for controlling various mesoscopic systems that allows formation of tailor-made polymeric micro-sized colloids by directed coalescence of nucleation sites. However, control over the size of a single colloid requires constant monitoring of the growth process and deactivation of the optical trap once it reaches the required dimensions. Moreover, producing more than one colloid requires moving the sample to a pristine location where the process must be repeated.