About the Journal
Optimizing catalyst selectivity and activity in electrochemical CO2 reduction with an innovative approach as presented by Jana Roithová et al. Watch our video abstract and read the full article.
The arthropod cuticle is not only one of the most remarkable and versatile biological material but also a wonderful source of inspiration for developing new man-made composites. In this cover article ntls.20220060, Yann Delaunois and colleagues, investigate the spikes of the mantis shrimp with a multimodal approach and uncover several features allowing the spike to be a high-performance biological harpoon combing lightweight with high stiff and toughness.
What is chirality and how did Tomoyuki Ikai & Yashima Lab synthesize helicenes with this property? Watch our video abstract and read the full article.
Call for Papers
Special Collection on “Extracellular Vesicles During Development and Disease”
- EVs produced by healthy cells versus transformed, diseased, or damaged cells
- EVs from pathogen modulating host interaction and communication
- Proteins, RNAs, and other cargos
- Diagnostic and therapeutic potential
View full announcement here.
Automated segmentation of insect anatomy from micro‐CT images using deep learning
-  19 September 2023
Micro-CT imaging has become readily accessible for morphological biology studies, generating data at overwhelming rates. To facilitate ecological discovery, micro-CT-produced 3D images of animals need efficient processing and analysis. However, segmentation of inner parts of scanned specimens can be very time-consuming. Hence, we developed a deep learning-based pipeline for accurate, fully automated segmentation of micro-CT images of insects, designed for ant brains but extendable to other insects. Further, our annotated dataset is among the first for micro-CT images of insects.
The propagation of Hermite–Gauss wave packets in optics and quantum mechanics
-  22 August 2023
The propagation of Hermite Gauss (HG) wave packets in both optics and quantum mechanics is analysed. The identity of the paraxial approximation of optics and the time-dependent Schrödinger equation of quantum mechanics is demonstrated. The definition of Bohmian trajectories as the loci of normals to the wave fronts is applied to both equations. Further, it is demonstrated that these trajectories are the same for all HG functions. The Gouy phase is shown to arise from the adiabatic energy or frequency integral. In a frame co-moving along the trajectory, the space wave function is constant and is equal to its Fourier-transformed function.The Gouy phase appears as the natural time in this moving frame.
Comparative proteomic analysis of tail regeneration in the green anole lizard, Anolis carolinensis
-  17 August 2023
Lizards are capable of multi-tissue appendage regeneration, and anole lizards have been examined by transcriptomic and microRNA sequencing during tail regrowth. The first proteome for the green anole identified a total of 2,646 proteins in the regenerating tail, permitting integration of proteomic and transcriptomic data in this model. This proteomic analysis confirm pathways and gene families transcriptionally activated in tail regeneration in the green anole as well as identify uncharacterized proteins whose role in regrowth remains to be revealed.
Foray into the topology of poly‐bi‐‐annulenylene
-  15 August 2023
Exhaled aerosols and saliva droplets measured in time and 3D space: Quantification of pathogens flow rate applied to SARS‐CoV‐2
-  8 July 2023
Knowing the number of virions which are exhaled by a person requires precise measurements of the size, count, velocity and trajectory of the virus-laden particles that are ejected directly from the mouth. This is achieved in 3D, at 15,000 images/s and applied when speaking, yelling and coughing. From the measured data, the flow rate of SARS-CoV-2 emitted through ejected saliva droplets and aerosols has been deduced. Note that the flow rate of other diseases, such as influenza, tuberculosis or measles, can also be estimated based on these measurements.
The following is a list of the most cited articles based on citations published in the last three years, according to CrossRef.
Direct measurement of key exciton properties: Energy, dynamics, and spatial distribution of the wave function
-  7 June 2021
Chemical dynamics from the gas‐phase to surfaces
-  19 May 2021
The Dynamical Approach to surface chemistry relies on the fruitful interplay between experiment and theory. By developing first principles models that successfully explain dynamics experiment, we can examine the detailed atomic motion involved in chemical processes. Here is an image representing a trajectory of H atoms colliding with a graphene surface forming a transient C-H bond. The dynamical approach allows us to understand the sticking of H atoms to graphene surfaces and more generally the nature of the interactions during the collisions. Here, the H atom approach triggers an electronic change to the system within about 10 femtoseconds, where the attacked C-atom in the graphene experiences partial electronic re-hybridization from sp2 to sp3. Of course, this also affects the electronic bonding to its neighbors. The fastest response to this electronic change is to excite in-plane C-C stretching. In fact, it is the next nearest neighbor C-atoms (and not the C-atom being attacked by the H atom) that begin moving first. Only later does the H-attacked C-atom begin to pucker out of plane, exerting a drag on the departing H atom.The transfer of energy to these four atoms accounts for most of the large energy loss observed in experiment.
Asymmetric hydrogenation of γ-branched allylamines for the efficient synthesis of γ-chirogenic amines
-  5 August 2021
The challenging asymmetric hydrogenation of γ-branched allylamines has been realized by using a bisphosphine-Rh catalyst bearing a large bite angle to generate applicable γ-chirogenic amines with excellent enantioselectivity (up to >99% ee) and high efficiency (up to 50000 S/C). A nearly linear P-Rh-P coordination pattern and a weak interaction-promoted substrate activation mode, both of which have never been reported in metal-catalyzed hydrogenations, have been demonstrated according to the mechanistic calculations.
Consecutively fused single‐, double‐, and triple‐expanded helicenes
-  3 March 2022
Defect-free single-, double-, and triple-expanded helicenes with C-, S-, and M-shaped fully conjugated helical ladder structures, respectively, are quantitatively and chemoselectively synthesized through acid-promoted intramolecular multistep cascade alkyne benzannulations of anthracene-based cyclization precursors composed of a large number of chiral (racemo) and achiral (meso) dynamic stereoisomers arising from axial chirality. The configurationally stable and optically pure triple-expanded helicene emits intense circularly polarized light with the highest circularly polarized luminescence brightness among all the reported CPL-active helicenes and helicenoids.
Parallel and antiparallel peptide double β‐helices controlled by metal‐induced folding and assembly
-  9 April 2021