The consolidation results of fine tungsten powders, W-Cu composite and W/Cu FGM by using a novel method combining resistance sintering with ultra high pressure have been reviewed. The densification effects of the consolidation parameters, including pressure, input power and sintering time, have been investigated. The sintering mechanism of this method was quite different from other sintering methods. Particle rearrangement, sliding, distortion and crushing due to the ultra high pressure are the dominant mehanisms at the initial stage, then the dominant sintering mechanisms are transient arc-fused processes controlled by the input power.

Phellinus sp. are assigned to the Basidiomycotina, Hymenomycetes, Aphyllophorales and Hymenochaetaceae, and have been shown containing various bioactive substances including triterpenoids, polysaccharides and flavones[1]. Traditional Chinese herbalists believe that Phellinus species are effective in treating many gynecopathic ailments[2] and are also reported to exhibit other pharmacological functions including tumor cell inhibition, antioxidant activity and anti-hepatic fibrosis effects[3]. Polysaccharides of Phellinus sp. has been reported to possess antitumor activities and inhibit tumor recrudescence and metastasis. There are little studies comparing the chemical composition and biological activities difference among polysaccharides from different Phellinus sp and little report about the pure polysaccharide structure analysis. In this study, eight kinds of crude polysaccharides were extracted from Phellinus fruit bodies and their chemical composition and bioactivities were researched. The polysaccharide and protein contents of eight crude polysaccharides had a certain extent differences. Monosaccharide composition and content of amino acids also existed some differences in eight crude polysaccharides. Eight different polysaccharides all showed enhancing splenocyte proliferation effect in vitro. PB-10P and JSHP had high cell proliferation rates with 50㎍/ml concentrations. The results indicated in some extent the immune activity of crude polysaccharides were correlation with the polysaccharide and protein content and composition of each sample. The crude polysaccharides of P. igniarius were further isolated and purified using DEAE Sepharose F. F. and gel-filtration chromatography (Sephacryl S-100-500 ）repeatedly. Five water-soluble homogeneous polysaccharides (P60w1、P60s1、P1SP1、P10SP1and P100SP1) were obtained. Lack of absorption at 280 nm and 260 nm by UV scanning indicated that contained no protein and nucleic acid. HPLC produced a single symmetrical peak, indicated homogeneity and their molecular weigh were 1.71×104 Da、2.07×104 Da、1.48×104 Da、2.20×104 Da and 2.56×104 Da respectively. Structural of P60w-1 were determined using sugar and methylation analysis combined with 1H and 13C NMR spectroscopy, including COSY, TOCSY, NOESY, HSQC and HMBC experiments. The effect of P60w-1 on tumor growth was examined using subcutaneously transplanted H22 and Lewis Lung Carcinoma (LLC) tumor mouse models. Cyclophosphamide or Coriolus versicolor polysaccharopeptide served as positive controls in evaluating tumor response. Results showed that P60w-1 at the most effective dose of 100 mg/kg inhibited the growth of H22 and LLC by 48% and 37%, respectively.

Refractory materials, such as W and Mo, are very useful elements for use in high-temperature applications. But it is not easy to fabricat pure W and Mo with very high density and retaining very fine grain size because of their high melting point. In this paper, a newly developed method named as resistance sintering under ultra high pressure was use to fabricate pure fine-grained W and Mo. The microstructure was analysis by SEM. The sintering mechanism is primary analyzed. Basic physical property of these sintered pure W and Mo, such as hardness, bend strength, are tested.

Through the review of developing course of China cemented carbide industry, the writer of this paper at the first time generalizes it into five stages. The writer analyses China cemented carbide industry present status in aspects of produce technology, product structure, operation and management etc. Mean while by analysis of existed shortages in cemented carbide industry, the write considers that it also has three advantages in resource and scale, industry foundation and categories, market and price, and brought out some suggestion and imagination for the future develpment of China cemented carbide industry.

In the viewpoint of engineering, materials problem is a key problem, which determines whether the exploitation of fusion energy will be success. The most important class of fusion materials is plasma-facing materials (PFM). W, as high Z high melting-point metal is one of the most important candidate materials due to its high plasma erosion resistance. Improving the ductility of W and W based alloy, lowering its ductile-brittleness transition temperature for meeting the requirements of fusion application is an important task. In this paper, severalpowder meatllurgy methods of fabricating W and W based materials are being investigated.

This paper introduces a special spheroidizing technology at ultra-high temperature. The conventional cast tungsten carbide (YZ) is melted at high temperature, rapidly cooled and spheroidized on a new ultra-high temperature spheroidizing equipment to prepare various grades WSC powders.

This paper described the state of art of porous metal materials, the typical manufacturing technologies and performances of sintered metal porous materials, with emphasis on the recent research achievements of CISRI in development of porous metal materials. High performance porous metal materials, such as metallic membrane, sub-micron asymmetric composite porous metal, large dimensional and structure complicated porous metal aeration cones and tube, metallic catalytic filter elements, lotus-type porous materials, etc, have been developed. Their applications in energy industry, petrochemical industry, clean coal process and other industrial fields were introduced and discussed.

Tungsten coatings with different interlayers onto the oxygen-free copper substrates were fabricated by atmosphere plasma spraying. The effects of different interlayers of NiCrAl, NiAl and W/Cu on bonding strength were studied. SEM, EDS and XRD were used to investigate the photographs and compositions of these coatings. The tungsten coatings with different initial particle sizes resulted in different microstructures. Oxidation was not detected in the tungsten coating, but in the interlayer, it was found by both XRD and EDS. The tungsten coating deposited directly onto the copper substrate presented higher bonding strength than those with different interlayers.

The nanoparticles were synthesized by photochemical deposition in a suspension system. The prepared products were characterized by means of XRD, Uv-vis and photoluminescence spectra (PL). Its photocatalytic activity was investigated by the decomposition of methylene blue (MB) solution under illumination of visible and ultraviolet light, respectively. Compared to , the photocatalytic activity of the as-prepared is obviously enhanced due to the decreasing recombination of a photoexcitated electron-hole pairs. The Mechanism in which photocatalytic activity is enhanced has been discussed in detail.

The 6th East Asian Meeting of Astronomy was held just at the time of 400 years after the discovery of SN (supernova) 1604 and its pre-maximum observation by the astronomers both from the East and the West in the 17th century. It has a special meaning and is interesting to look back on the historical observation of SN 1604. In this paper, we only limit to concern the Chinese observation on SN 1604.

The large field multi-color CCD sky survey program based on the 60/90 Schmidt telescope of NAOC has been processed in cooperation among many observatories and universities of Asian countries. The observation and scientific results are reviewed.

Aquatic products have been exported and exported in large quantities as they provide high-quality protein, promote brain development and maintain cardiovascular health. China’s exports of aquatic products will reach 21. 926billion U. S. dollars in 2021, up 15. 31 percent year-on-year and 23. 03 billion U. S. dollars in 2022, an increase of 5. 04 percent year-on year. Based on this background, this paper will analyze the export structure of Chinese fisheries products based on HS code and analyze the competitiveness of Chinese fisheries products through trade competition index (TC). The paper points out the existing problems in China’s export of fishery products to Korea and puts forward a targeted and effective development strategy.

It has been 30 years since the establishment of diplomatic relations between China and South Korea, and South Korea is one of China’s most important trade partners in Northeast Asia. However, with the change in manufacturing competitiveness, the global value chain position of China and South Korea, and the rise of anti-globalization and trade protectionism, the trade between China and South Korea has also suffered a significant impact. This paper first used the international market share and trade specialization coefficient to make a quantitative comparison of the competitiveness of the primary industries of China and South Korea. Then it measured the trade integration index and export product similarity index of China and South Korea. It is found that: although China and South Korea have a particular competitive relationship in the main industrial fields, the differences in their respective areas of strength are significant, and the two countries show a good complementarity of resources. Therefore, China and South Korea should abandon suspicion, strengthen mutual trust, further optimize the trade structure between the two countries, make use of the framework of the regional agreement of RCEP, support China and South Korean enterprises to jointly develop the third-party market, and maintain and consolidate China-South Korea relations to promote the long-term development of economic and trade cooperation between the two countries.