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Industrial pure aluminum has been widely used in industry. However, it caused great difficulties in welding process due to its characteristics such as easy oxidation, high thermal conductivity and specific volume, low melting point. In order to overcome this problem, improving the welding quality of industrial pure and reducing the welding defects is of great significance. In this paper, the weldability of 1050A industrial pure aluminum plate (5 mm thick) with HS331, SAl-2, 1050A leftover materials and homemade welding wire with Ni-Cr alloy as four different filler materials was studied by using manual TIG welding. Metallographic test and mechanical performance test were used to assess microstructure and mechanical properties of the resulting welding joint. The results show that the microstructure and mechanical properties of the resulting welding joint with homemade welding wire with Ni-Cr alloy is relatively better than the others, which offers important implication for the improvement of the welding properties of industrial pure aluminum.

Compound pearl protein polypeptide (CPPP) was investigated by MTT method as well as detecting alkaline phosphatase (ALP) and mineralized nodes in osteoblasts from SD rats. In vivo the rat models of osteoporosis were induced by ovariectomy and treated with three doses of CPPP (5.0mg.kg-1.d-1, 20.0mg.kg-1.d-1, and 80.0mg.kg-1.d-1). The serum levels of estradiol (E2), osteocalcin (BGP), transforming growth factors (TGF-β1) and ALK, together with the bone mineral density (BMD) and the contents of calcium (Ca) and phosphorus (P) in 24h urine, were detected. The results show that CPPP can enhance cell proliferation, ALK activity and the number of mineralized nodes in rats osteoblasts. CPPP significantly increase the serum level of E2, TGF-β1, and BMD, and decrease the serum level of ALP, BGP and the contents of Ca, P in 24h urine. So, CPPP can increase bone density, and thus it is conductive to osteoporosis prevention and treatment of the elderly.

A new coordination polymer based on cobalt nitrate and 2-4-pyridyl-1H-benzimidazole- 5,6-dicarboxylate (H2pbd), namely [Co (pbd)2·(H2O)2]n·n (H2O)2, have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction. The crystal of the complex crystallizes in triclinic, space group P-1 with a=7.6708(6)Å, b=8.0009(8)Å, c=12.8348(12)Å, α=96.4040(10) o, β=102.9480(10) o, γ=112.142(2) o, V=694.11(11)Å3, Z=1, C28H22CoN6O12 and F(000)=376.0. The H2pbd ligand links the Co (II) atoms into a double stranded chain.

In the study, through the addition astaxanthin into the bait for the pearl oyster Pinctada martensii for 3 months, we studied the accumulation and existence form of astaxanthin in pearl oyster through qualitative and quantitative analysis which adopted High Performance Liquid Chromatography method; the transmission of astaxanthin in shells was detected by Micro-Raman spectrometry. The results showed: 6.870±1.356μg/g of astaxanthin existed in the control group of Pinctada martensii, and 74.799±5.907μg/g of astaxanthin existed in the experimental group, some of them were existent in the form of astaxanthin esters. Weak carotenoid characteristic peak occurred in the control group, while the carotenoid characteristic peaks intensity enhanced obviously in the experimental group, which illustrated remarkable increase of carotenoid content in the shell. These findings will not only provide the basis for colorful pearl cultivation via food-borne transmission but also lay a foundation for further artificial regulation and control of pearl color.

A new coordination polymer based on cadmium nitrate and 2-（4-pyridyl-1H-benzimidazole- 5,6-dicarboxylate (H2pbd) , namely [Cd( pbd)2•(H2O)2]n•n(H2O)2, have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, and single crystal X-ray diffraction. The crystal of the complex crystallizes in triclinic, space group P-1 with a = 7.7200 Å, b = 8.1029Å, c = 13.0801Å, α= 96.1270(10) º, β = 102.1280(10)º, γ= 112.479(2) º, V = 723.15(12) Å3, Z =1, C28 H22 Cd N6 O12 and F(000) = 376.0. The H2pbd ligands links the Cd(II) atoms into a double stranded chain.