Electromagnetic Force on an Aluminum Honeycomb Sandwich Panel Moving in a Magnetic Field.

This paper reports a method for calculating the electromagnetic force acting on an aluminum honeycomb sandwich panel moving in a magnetic field. This research is motivated by the non-contact electromagnetic detumbling technology for space non-cooperative targets. Past modeling of the electromagnetic forces and torques generally assumes that the target is homogeneous.

A novel integrated time-resolved array avalanche photodiode detection system for nuclear resonant scattering measurements.

The nuclear resonant scattering (NRS) experiment requires photon-counting detectors with high time resolution, short dead time, large dynamic range, low noise, and large detection area. An 8-channel avalanche photodiode (APD) array detector system with high integrity, flexibility, and reliability has been developed to adapt to the demands of NRS experiments. The detector system mainly consists of four key parts: (i) an array-APD sensor, (ii) 8-channel integrated fast preamplifiers, (iii) the time-to-digital converter readout electronics, and (iv) a data acquisition system and EPICS support software.

Spatial Metallomics Reveals Preferable Accumulation of Methylated Selenium in a Single Seed of the Hyperaccumulator †.

is a Se hyperaccumulator found in Enshi, China. In this study, spatial metallomics was applied to visualize the distribution and speciation of Se in a single seed of . It was found that Se reached 1729.

Synthesis and Biological Evaluation of Novel Resveratrol-NSAID Derivatives as Anti-inflammatory Agents.

Long-term use of nonsteroidal antiinflammatory drugs (NSAIDs) may cause serious side effects such as gastric mucosal damage. Resveratrol, a naturally dietary polyphenol, exhibited anti-inflammatory activity and a protective effect against gastric mucosa damage induced by NSAIDs. In this regard, we synthesized a series of resveratrol-based NSAIDs derivatives and evaluated their anti-inflammatory activity against nitric oxide (NO) overproduction in lipopolysaccharide (LPS)-stimulated RAW264.

Total synthesis and cytotoxic activities of longamide B, longamide B methyl ester, hanishin, and their analogues.

The marine alkaloids, longamide B (1), longamide B methyl ester (2), hanishin (3), and a series of non-naturally occurring analogues were synthesized in an efficient manner from inexpensive commercially available dl-aspartic acid dimethyl ester. The cytotoxicities of these natural products (1-3) and their analogues (9-15) were evaluated against human lung adenocarcinoma (A549) and human prostate cancer (PC3) cells. This is the first evaluation of the cytotoxicities of these alkaloids in these cancer cell lines and it revealed that analogue 15 had comparable cytotoxic activity to its natural parent compound, (±)-hanishin (3).

Coumarins with α-glucosidase and α-amylase inhibitory activities from the flower of Edgeworthia gardneri.

The flower of Edgeworthia gardneri is consumed in beverages in Tibet and has potential health benefits for diabetes. As a part of our continuous studies on dietary supplements for diabetes, two monomers, five dimers and one trimer of coumarins were isolated from the flowers of E. gardneri.

α-Glucosidase Inhibition and Antihyperglycemic Activity of Phenolics from the Flowers of Edgeworthia gardneri.

The flowers of Edgeworthia gardneri are consumed as an herbal tea in Tibet with potential health benefits. To complement the current knowledge regarding the chemical composition and antihyperglycemic activity of the flower of E. gardneri, two new phenolics, gardnerol A and B (1 and 2), along with 19 known phenolics were isolated from the flower of E.

The measurement of differential EXAFS modulated by high pressure.

Differential EXAFS (DiffEXAFS) is able to detect subtle atomic perturbations in the local area of the absorbing atom. Here a new method of performing DiffEXAFS experiments under the modulation of high pressure has been developed. Periodic pressure was achieved in the gasket with the help of a dynamic diamond anvil cell, and the measurements were conducted in common energy-scanning mode.

Developing VUV spectroscopy for protein folding and material luminescence on beamline 4B8 at the Beijing Synchrotron Radiation Facility.

The new 4B8 beamline provides UV-VUV light in the wavelength range from 360 to 120 nm. It uniquely enables two kinds of spectroscopy measurements: synchrotron radiation circular dichroism spectroscopy and VUV excited fluorescence spectroscopy. The former is mainly used in protein secondary structure studies, and the latter in VUV excited luminescent materials research.