Bis[4-chloro-2-(imino­meth­yl)phenolato]copper(II) methanol disolvate

The title compound, [Cu(C7H5ClNO)2]·2CH3OH, possesses crystallographic twofold symmetry, with the twofold axis passing through the central CuII ion. The metal centre is coordinated by two O atoms and two N atoms from two symmetry-related Schiff base ligands, forming a slightly distorted cis-CuN2O2 square-planar geometry. The complex mol­ecules are linked via the solvent methanol mol­ecules by O—H⋯O and N—H⋯O hydrogen bonds, leading to the formation of chains along the b axis

Macrophage migration inhibitory factor (MIF) family in arthropods : Cloning and expression analysis of two MIF and one D-dopachrome tautomerase (DDT) homologues in Mud crabs, Scylla paramamosain

Acknowledgements This research was supported by grants from the National Natural Science Foundation of China (Nos. 31172438 and U1205123), the Natural Science Foundation of Fujian Province (No. 2012J06008 and 201311180002) and the projects-sponsored by SRF. TW received funding from the MASTS pooling initiative (The Marine Alliance for Science and Technology for Scotland) funded by the Scottish Funding Council (grant reference HR09011) and contributing institutions.Peer reviewedPostprin

Cadherin2 (N-cadherin) plays an essential role in zebrafish cardiovascular development

BACKGROUND: Cadherins are cell surface adhesion molecules that play important roles in development of vertebrate tissues and organs. We studied cadherin2 expression in developing zebrafish heart using in situ hybridization and immunocytochemical methods, and we found that cadherin2 was strongly expressed by the myocardium of the embryonic zebrafish. To gain insight into cadherin2 role in the formation and function of the heart, we analyzed cardiac differentiation and performance in a cadherin2 mutant, glass onion (glo). RESULTS: We found that the cadherin2 mutant had enlarged pericardial cavity, disorganized atrium and ventricle, and reduced expression of a ventricular specific marker vmhc. Individual myocardiocytes in the glo mutant embryos became round shaped and loosely aggregated. In vivo measurements of cardiac performance revealed that the mutant heart had significantly reduced heart rate, stroke volume and cardiac output compared to control embryos. Formation of the embryonic vascular system in the glo mutants was also affected. CONCLUSION: Our results suggest that cadherin2 plays an essential role in zebrafish cardiovascular development. Although the exact mechanisms remain unknown as to the formation of the enlarged pericardium and reduced peripheral blood flow, it is clear that myocardiocyte differentiation and physiological cardiovascular performance is impaired when cadherin2 function is disrupted

TaintTrace: Efficient Flow Tracing with Dynamic Binary Rewriting

TaintTrace is a high performance flow tracing tool that protects systems against security exploits. It is based on dynamic execution binary rewriting empowering our tool with fine-grained monitoring of system activities such as the tracking of the usage and propagation of data origi-nated from the network. The challenge lies in minimizing the run-time overhead of the tool. TaintTrace uses a number of techniques such as direct memory mapping to optimize performance. In this paper, we demonstrate that TaintTrace is effective in protecting against various attacks while main-taining a modest slowdown of 5.5 times, offering significant improvements over similar tools.

A secure cross-domain authentication scheme based on threshold signature for MEC

The widespread adoption of fifth-generation mobile networks has spurred the rapid advancement of mobile edge computing (MEC). By decentralizing computing and storage resources to the network edge, MEC significantly enhances real-time data access services and enables efficient processing of large-scale dynamic data on resource-limited devices. However, MEC faces considerable security challenges, particularly in cross-domain service environments, where every device poses a potential security threat. To address this issue, this paper proposes a secure cross-domain authentication scheme based on a threshold signature tailored to MEC’s multi-subdomain nature. The proposed scheme employs a (t,n) threshold mechanism to bolster system resilience and security, catering to large-scale, dynamic, and decentralized MEC scenarios. Additionally, the proposed scheme features an efficient authorization update function that facilitates the revocation of malicious nodes. Security analysis confirmed that the proposed scheme satisfies unforgeability, collusion resistance, non-repudiation and forward security. Theoretical evaluation and experimental simulation verify the effectiveness and feasibility of the proposed scheme. Compared with existing schemes, the proposed scheme has higher computational performance while implementing secure authorization updates

Analysis of contrast sensitivity on examination for pilots

AIM: To study the influential factors of the contrast sensitivity function(CSF), we tested and investigated the CSF of navy pilots. METHODS: Totally 58 pilots(116 eyes)were examined by CSF under the nighttime, nighttime & periglare, daytime, daytime & periglare conditions for 5 spacial frequencies with OPTEC6 500 Vision Tester. RESULTS: From mean diagram of curves, the peak of CSF under the nighttime, nighttime & periglare conditions was at 3-6c/d, daytime, daytime & periglare conditions was at 6c/d. CONCLUSION: The distant CSF is better than the near CSF in navy pilots,the binoculus CSF is better than that of the single eye. The spatial characteristics of CSF in navy pilots were reflected by present study

Preparation and Properties of Oligo-chitosan Cross-linked Gelatin Biodegradable Films

Objective: The aim was to evaluate the effect of oligo-chitosan modification on the properties of gelatin-based films. Methods: The gelatin-based films were prepared by using gelatin extracted from scrap pig skin as a cheap raw material and chitosan and polyvinyl alcohol as cross-linking agents. The structural and mechanical properties were characterized by Fourier infrared spectroscopy, X-ray power diffractometry, scanning electron microscopy, spectroscopy, and tensile test. Meanwhile, the ability of gelatin-based films in antioxidant, antibacterial, water stability and biodegradation were evaluated. Results: The multi-cross-linked gelatin-based films showed excellent mechanical properties, with a highest fracture stress of 37.09 MPa, a maximum tearing energy of 56.71 kJ/m2, and a good physical form maintained after 48 h of immersion in water. In addition, the films possessed excellent light transmission (up to 92.32%), good oxidation resistance (radical scavenging capacity up to 75.12%), excellent antimicrobial and biodegradability (complete degradation time <45 h). Conclusions: The addition of oligo-chitosan has changed the properties of gelatin-based films in mechanics and biodegradation, and endowed the films with good antibacterial and antioxidant capacity, indicating that it had great potential application value in food packaging