Constructing porous ZnO/SnO2 nanocomposites for the detection of methane at low operating temperature

Journal of Porous Materials - Aimed at detecting methane (CH4) gas at low operating temperature, porous ZnO/SnO2 nanocomposites were constructed through a simple two-step method. Pure SnO2 with a...     

Identification and Allele Combination Analysis of Rice Grain Shape-Related Genes by Genome-Wide Association Study

Grain shape is an important agronomic character of rice, which affects the appearance, processing, and the edible quality. Screening and identifying more new genes associated with grain shape is beneficial to further understanding the genetic basis of grain shape and provides more gene resources for genetic breeding. This study has a natural population containing 623 indica rice cultivars. Genome-wide association studies/GWAS of several traits related to grain shape (grain length/GL, grain width/GW, grain length to width ratio/GLWR, grain circumferences/GC, and grain size/grain area/GS) were conducted by combining phenotypic data from four environments and the second-generation resequencing data, which have identified 39 important Quantitative trait locus/QTLs. We analyzed the 39 QTLs using three methods: gene-based association analysis, haplotype analysis, and functional annotation and identified three cloned genes (GS3, GW5, OsDER1) and seven new candidate genes in the candidate interval. At the same time, to effectively utilize the genes in the grain shape-related gene bank, we have also analyzed the allelic combinations of the three cloned genes. Finally, the extreme allele combination corresponding to each trait was found through statistical analysis. This study’s novel candidate genes and allele combinations will provide a valuable reference for future breeding work.     

CFOSAT散射计几何定位验证与精度初步评估

采用STK软件对中法海洋卫星（CFOSAT）散射计几何定位算法进行了验证。针对CFOSAT散射计扇形波束扫描观测体制,分别就扇形波束扫描散射计几何定位原型算法、包含天线安装误差的完整几何定位算法利用STK进行了详细验证。结果表明了CFOSAT扇形波束散射计几何定位算法的准确性,与STK几何定位结果偏差在100 m以内。在此基础上,结合有源定标器实验数据,对CFOSAT实际观测数据几何定位参数进行了校正,给出了CFOSAT散射计几何定位精度的初步评估。     

Transdermal Delivery of Indirubin-Loaded Microemulsion Gel: Preparation,Characterization and Anti-Psoriatic Activity

Psoriasis is an immune disease caused by rapid and incomplete differentiation of skin basal cells. Natural products such as indirubin have historically served as excellent sources for the treatments of psoriasis. However, the poor solubility and bioavailability due to its plane and rigid crystal structure, which limits its efficacy. Herein, to improve the efficacy of indirubin, a hydrogel-based microemulsion drug delivery system was developed for transdermal delivery. The mean droplet size of the optimized microemulsion was 84.37 nm, with a polydispersity index (PDI) less than 0.2 and zeta potential value of 0~−20 mV. The transdermal flux and skin retention of indirubin at 24 h were 47.34 ± 3.59 μg/cm² and 8.77 ± 1.26 μg/cm², respectively. The optimized microemulsion was dispersed in carbomer 934 hydrogel to increase the consistency. The indirubin-loaded microemulsion gel was tested on an imiquimod-induced psoriasis mouse model. Results showed that this preparation can improve psoriasis symptoms by down-regulating the expression of IL-17A, Ki67, and CD4⁺T. This experiment provides great scalability for researchers to treat psoriasis, avoid first-pass effects, and increase the concentration of targeted drugs.     

麦草浆黑液中LCC组分及黑液热解处理研究

从麦草浆黑液中分离并鉴别LCC组分,指出麦草浆黑液LCC含量要比马尾松浆黑液高5.35倍,证实LCC是麦草浆黑液高粘度和低燃烧膨胀性的主要原因之一。采用原料高温蒸煮和黑液高温裂解的热处理工艺,可以使麦草浆黑液LCC含量降到拉近马尾松浆黑液的含量,粘度降低40%左右,VIE值提高3倍左右,但仍明显差于马尾松浆黑液。本文还比较了两种处理工艺的优劣。     

复方沙棘保健茶饮料的研制

以沙棘原汁、绿茶、山楂、枸杞及决明子为原料,研究了一种具有降血压、降血脂等保健功效的复合高级饮料的加工工艺,经正交试验,结合理化分析、微生物检测和感官评价,得出该复合保健饮料的最佳配方。     

COMBINED TECHNOLOGY OF SMELTING REDUCTION IRON-MAKING AND CLEAN FUEL MANUFACTURE

Smelting reduction is a front iron making technology for the 21st century. It can produce liquid iron by direct using common coal but not charred coal. The process has many attractive advantages such as concise flow, low investment and production cost, low environmental pollution and high quality molten iron. Combined with a reciprocal chemical technology, energy efficiency can be further improved by transforming mass coal gas, by-produced in smelting reduction,into dimethyl ether, a clean fuel. Method and characteristics of the combined technology are discussed in this paper.     

兰尖铁矿矿石运输平硐局部失稳机理分析

通过现场地质调查,结合现场实际情况进行针对性的地下运矿平硐爆破震动测试以及平硐断面收敛测量,借助非线性弹塑性有限元数值分析手段,揭示了该运矿平硐发生局部失稳的破坏机理,为该段后续加固工程设计提供了有利依据。