CNTs that consist of Co nanoparticles and atomically-dispersed Co atoms efficiently generate hydrogen from AB at a rate of 7833 mL H ₂ g _Co ⁻¹ min ⁻¹ .

The suppression of ASR expansion hazards of glass concrete has always been a key and hot issue in the research of glass concrete. According to the ASTM C1260-14 fast mortar rod method, glass sand and glass powder act as fine aggregate and auxiliary cementing material, respectively. The changes in expansion rate with different amounts of glass sand content and different particle sizes of glass powder in mortar rods were compared, and the effects of glass sand content and the glass powder particle size on the expansion of ASR were analyzed. SEM was used to compare and analyze the microstructure of mortar rods to explore the mechanism of ASR expansion of glass concrete, and the results showed that the addition of glass powder had a certain inhibitory effect on ASR expansion. The larger the particle size of glass powder was, the better the inhibition effect on ASR expansion and the longer its duration. Compared with the three groups of experiments of 0–13 μm, 13–38 μm, and 38–75 μm, it was found that the influence of the glass powder particle size on the expansion of ASR was weaker than that of dosage. The inhibitory effect of glass powder on ASR expansion is related to the fact that glass powder is more involved in pozzolanic reaction in the early hydration process.

The application progress of oil shale retorting process at home and abroad is mainly introduced, and the advantages and disadvantages of dry distillation furnaces in different countries are compared. The development trend of oil shale retorting process is prospected. At present, several oil shale retorting technologies have been applied and newly appeared in Fushun furnace retorting, fluidized bed retorting and decarbonization processes, convection heating oil shale mining processes, ATP dry distillation furnaces, ICP retorting furnaces, etc. Very mature, but the oil recovery rate using these technologies is relatively low. The industrialized dry distillation technology currently being put into production at home and abroad has been discussed, and the problems in the dry distillation technology have been studied.

In order to increase use ratio of steel slag solid waste, the concrete containing steel slag powder and zeolite powder as admixtures was prepared by using the orthogonal test method. The effects of water-binder ratio, sand ratio, steel slag powder content and zeolite powder on working properties, mechanical strength and chloride ion permeability of the concrete was studied. It was found that the early strength of the concrete had a decrease with the mixing of steel slag and zeolite powders, but its later strength approached to pure concrete. Moreover, the physical filling and pozzolanic activity of the admixtures increased the density of the concrete, resulting in the improvement of the durability of the concrete by the migration speed of Cl− reducing. The optimum mix ratio of C40 steel slag powder-zeolite powder concrete is obtained, and which had the slump of 220 mm, the 3 d, 7 d and 28 d compressive strengths of 27.8 MPa, 37.5 MPa and 48.4 MPa, the 6 h electric flux of 950 C and the diffusion coefficient of 1.65 × 10−12 m2 /s.

A new highly oxygenated ent-atisane diterpenoid, namely excagallonoid A (1), together with five known analogues (2 − 6) were isolated from the leaves and twigs of Excoecaria agallocha. Their structures were elucidated on the basis of extensive spectroscopic analyses (HRESIMS, UV, IR, 1 D and 2 D NMR), and the absolute configurations of 1 and 5 were determined by single-crystal X-ray diffraction. Compound 1 represents the first example of an ent-atisane diterpenoid featuring a vicinal 2,3-diol moiety. Compounds 1 and 4 exhibited weak cytotoxicities in vitro against RKO colon cancer cells with IC₅₀ values of 28.7 ± 1.98 and 32.6 ± 2.81 µM, respectively. Graphical Abstract