磷化工"双废"联用工艺研究

以磷化工"双废"——磷石膏、磷尾矿为原料,通过硫酸循环酸浸磷尾矿,经盐酸分解磷尾矿、碳化磷石膏、转晶、酸化、析钙、析磷、浓缩、析镁等过程,得到了转化率为96.94％ 的CaCO 3,CaO质量分数为23.38％ 的二水石膏,MgO质量分数为8.27％、P2O5质量分数为23.89％、氮质量分数为6.83％ 的氮镁磷肥,氮质量分数为23.76％ 的氯化铵以及M g O质量分数为30.04％ 的碳酸镁等,所得产品均符合工业应用要求.讨论了循环酸浸过程中离子浓度的变化情况,为联合处理磷石膏、磷尾矿提供了新思路.     

Ru/SiO2 Catalyst for Highly Selective Hydrogenation of Dimethyl Malate to 1,2,4-Butanetriol at Low Temperatures in Aqueous Solvent

Catalysis Letters - Catalytic selective hydrogenation of esterified malic acid to produce 1,2,4-butanetriol (1,2,4-BT) using H2 as the reducing reagent suffers from the low 1,2,4-BT selectivity....     

Enhanced mechanical,thermal and dielectric properties of polyimide nanocomposites containing SiCp (SiCw) nanofillers for high energy-storage applications

Journal of Polymer Research - In this paper, we aimed to develop the nanocarrier based on poly (N-isopropyl acrylamide)—allyl acetoacetate grafted MoS2 nanosheets. The obtained polymer...     

Preparation of antimicrobial activated carbon fiber for adsorption

Journal of Porous Materials - Activated carbon fiber (ACF) is often used as efficient adsorption material for removal of contaminants from water. However, the propagation of microorganism on ACF...     

Design and Numerical Optimization of Gas Guidance System in Casting Silicon Furnace by the Orthogonal Experiment

Silicon - 3D global simulations were performed to investigate the gas flow and impurities transport in casting silicon furnace under the influence of a unique designed spray-type gas guidance...     

“Pile - Steel Support - Anchor” System for Foundation in Rock-Soil Layer

Soil Mechanics and Foundation Engineering - The synergetic effect of the combined supporting system (pile + steel support + anchor) was studied through field tests and finite-element numerical...     

Analysis of stress evolution characteristics during TBM excavation in deep buried tunnels

Bulletin of Engineering Geology and the Environment - Full-face tunnel boring machines (TBMs) are widely used in tunnel engineering projects as an efficient, safe and economical tunneling method....     

Fabrication of shish-kebab-structured carbon nanotube/poly(ε-caprolactone) composite nanofibers for potential tissue engineering applications

The electrospinning process was applied to fabricate the nanofibers of biodegradable poly(ε-caprolactone)(PCL) in which different contents of multiwalled carbon nanotubes(MWCNTs) were embedded. Afterward,the electrospun nanofibers were successfully decorated with shish-kebab structure via a self-induced crystallization technique. The topographical features and the mechanical properties of the composite scaffolds were characterized,and the biocompatibility of the material was assessed by using human osteogenic sarcoma osteoblasts(MG-63 cells). The carbon nanotube(CNT) concentration is found to affect the fiber diameter and mechanical properties of electrospun nanofibers and the periodic distance of the shish-kebab architecture. Cellular attachment and proliferation assays reveal that 0.5 wt% CNT-embedded PCL scaffold shows enhanced biocompatibility with MG-63 cells than their counterparts made of neat PCL, and the collagen-like nanotopology provided by the shish-kebab structure further facilitates the cell adhesion and proliferation. The superior interactions between cells and scaffolds demonstrate that the shish-kebab-structured CNTs/PCL nanofibers may be promising candidate for tissue engineering scaffold application.     

A CCD-based reader combined with CdS quantum dot-labeled lateral flow strips for ultrasensitive quantitative detection of CagA

Immunochromatographic assays are widely used to detect many analytes. CagA is proved to be associated closely with initiation of gastric carcinoma. Here, we reported that a charge-coupled device (CCD)-based test strip reader combined with CdS quantum dot-labeled lateral flow strips for quantitative detection of CagA was developed, which used 365-nm ultraviolet LED as the excitation light source, and captured the test strip images through an acquisition module. Then, the captured image was transferred to the computer and was processed by a software system. A revised weighted threshold histogram equalization (WTHE) image processing algorithm was applied to analyze the result. CdS quantum dot-labeled lateral flow strips for detection of CagA were prepared. One hundred sera samples from clinical patients with gastric cancer and healthy people were prepared for detection, which demonstrated that the device could realize rapid, stable, and point-of-care detection, with a sensitivity of 20 pg/mL.     

建筑工程施工管理控制研究

面对不断激烈化的市场竞争,建筑工程行业要想得到平稳快速的发展,就要将更多的精力投入于工程施工管理及其控制工作之中。笔者从不同的角度,从工程施工管理及其控制的存在问题出发,提出了具有针对性的解决对策。