Not Available

Not AvailablePaphia malabarica Chemnitz, 1782 is an economically important species of Venerid clam in Indian waters. The fishery of P. malabarica from Ashtamudi estuary, Kollam, Kerala has been certified by marine stewardship council as sustainable and the fishery is now managed by a set of fishery management plans. The name P. malabarica is invalid now as it has been synonymized as Paphia (Protapes) gallus (Gmelin, 1791) in subsequent taxonomic investigations. We examined the taxonomic status of P. malabarica using morphological and molecular methods. Morphological characteristics of the shell mainly, shell structure, size and internal features were compared between P. gallus and P. malabarica indicating significant differences in morphology. Molecular investigations were carried out by amplifying and sequencing mitochondrial Cytochrome C Oxidase 1 (COI) and 16SrRNA sequences of P. malabarica collected from Ashtamudi (Kollam), Dharmadam, Kannur (3 locations in Kerala), Goa, Maharashtra, Gujarat and Tuticorin in order to clear the taxonomic ambiguity and validate the synonymy. Sequences of P. malabarica were compared with sequences of P. gallus and other Paphia species. Substantial genetic divergence was detected between P. malabarica and P. gallus with a K2P genetic distance value of 28.9% and distinct clustering in phylogenetic tree demonstrating that P. malabarica is well diverged from P. gallus. We suggest retaining the name P. malabarica considering that the synonymy with P. gallus is invalid.Not Availabl

Morphological and molecular investigations reveal that Paphia malabarica from Indian waters is not synonymous with Paphia (Protapes) gallus

Paphia malabarica Chemnitz, 1782 is an economically important species of Venerid clam in Indian waters. The fishery of P. malabarica from Ashtamudi estuary, Kollam, Kerala has been certified by marine stewardship council as sustainable and the fishery is now managed by a set of fishery management plans. The name P. malabarica is invalid now as it has been synonymized as Paphia (Protapes) gallus (Gmelin, 1791) in subsequent taxonomic investigations. We examined the taxonomic status of P. malabarica using morphological and molecular methods. Morphological characteristics of the shell mainly, shell structure, size and internal features were compared between P. gallus and P. malabarica indicating significant differences in morphology. Molecular investigations were carried out by amplifying and sequencing mitochondrial Cytochrome C Oxidase 1 (COI) and 16SrRNA sequences of P. malabarica collected from Ashtamudi (Kollam), Dharmadam, Kannur (3 locations in Kerala), Goa, Maharashtra, Gujarat and Tuticorin in order to clear the taxonomic ambiguity and validate the synonymy. Sequences of P. malabarica were compared with sequences of P. gallus and other Paphia species. Substantial genetic divergence was detected between P. malabarica and P. gallus with a K2P genetic distance value of 28.9% and distinct clustering in phylogenetic tree demonstrating that P. malabarica is well diverged from P. gallus. We suggest retaining the name P. malabarica considering that the synonymy with P. gallus is invalid

Direct Bandgap-like Strong Photoluminescence from Twisted Multilayer MoS2 Grown on SrTiO3

10.1021/acsnano.0c04801ACS Nano141216761 - 1676

High-temporal-Resolution X-ray Spectroscopy with Free-Electron and Optical Lasers

Ultrafast X-ray spectroscopies require flexible X-ray properties together with high temporal and spectral resolution. Here, we demonstrate simultaneous sub-20 fs and sub-eV resolutions for pump/probe experiments, without the need for additional photon arrival-time monitors

Pump–probe capabilities at the SPB/SFX instrument of the European XFEL

Pump–probe experiments at X-ray free-electron laser (XFEL) facilities are a powerful tool for studying dynamics at ultrafast and longer timescales. Observing the dynamics in diverse scientific cases requires optical laser systems with a wide range of wavelength, flexible pulse sequences and different pulse durations, especially in the pump source. Here, the pump–probe instrumentation available for measurements at the Single Particles, Clusters, and Biomolecules and Serial Femtosecond Crystallography (SPB/SFX) instrument of the European XFEL is reported. The temporal and spatial stability of this instrumentation is also presented.Keywords: pump–probe experiments; European XFEL; megahertz pump and probe sources; time-resolved experiments