The aim of the present study was to investigate the function of the DNA topoisomerase IIα ( gene and its associated genes in the progression of papillary renal cell carcinoma (PRCC). Online cancer databases, including cBioportal, Oncomine, OncoLnc and Search Tool for the Retrieval of Interacting Genes/Proteins were used to analyze the gene expression profile, function and regulation network in PRCC. The genes that were significantly co-expressed or mutually exclusively expressed with were identified. The genes co-expressed with were defined as a '-cancer panel', which cooperatively promotes PRCC progression. This gene panel performed well in predicting the prognosis of PRCC. In addition, the -cancer panel significantly affected the outcome of PRCC compared with clear cell renal cell carcinoma (CCRCC). The protein-protein interaction network of all genes associated with was also generated. This interaction network may provide foundation for the additional investigation of . Integrative understating of the-cancer panel may result in a novel avenue for treatment intervention in PRCC.

Polygoni Vivipari Rhizoma (PVR), the dried root of Polygonum viviparum, has been used as herbal medicine in China for a long time. In the present study, a new method based on multi-step matrix solid-phase dispersion (MSPD), ultrafiltration and high performance liquid chromatography (HPLC) for screening alpha-glucosidase inhibitors (AGIs) from PVR was proposed. First, three different PVR extractions were prepared by multi−step MSPD with 15% methanol, 60% methanol and 100% methanol. Second, the alpha-glucosidase inhibition tests for the three extracts were carried out, and the 60% methanol extraction showed the best activity. Then, the AGIs screening experiment was performed with ultrafiltration and HPLC analysis using the 60% methanol extraction. Seven binding components (quercetin−3−O−vicianoside, quercetin 3−O−neohesperidoside, rutin, hyperoside, quercetin 3−O−glucuronide, luteolin−7−O−neohesperidoside, kaempferol 3−glucuronide) were found. These seven components were further validated as the AGIs by molecular docking analysis. The developed method was a rapid and efficient tool for screening AGIs from PVR, which provided scientific data for the bioactive components study of PVR.

Consumers' environmental protection awareness promotes the quality of green products produced by remanufacturers, which requires higher input cost and more efforts but wins environmental reputation in return. In order to encourage remanufacturers to produce products with less pollution, government enacts environmental policy to subsidy the production of remanufacturing. This paper aims to analyze the impact of subsidy on remanufacturing decision and identify the optimal decisions under the effect of green network using a differential game model. First, both government and remanufacturer's cost functions are established with their own environmental effort, respectively. Then, their benefit functions are built to represent their own reward, in which multiple factors are taken into account including but not limited to the environmental reputation of remanufacturer and consumers' demand for remanufactured products. Using the models of Nash-non cooperative game, Stackelberg master-slave game and cooperative game, their benefits are calculated and compared. The equilibrium results show that the improvement level of products' environmental quality is equal to the level of subsidies, and subsidies will increase with the improvement of products' environmental quality. In addition, with the support of the government, remanufactures are able to produce the most environmentally friendly products with the most benefit. Finally, a case study is given to prove the theorems obtained in this paper.

Polygoni Cuspidati Rhizoma et Radix (PCR), the rhizome and root of Polygonum cuspidatum Sieb. et Zucc., has been used as an herbal medicine for a long time. In this study, the ultrafiltration combined with high performance liquid chromatography (UF-HPLC) method was developed to screen tyrosinase (TYR), α-glucosidase (α-GLU), and xanthine oxidase (XOD) inhibitors from PCR. Firstly, the inhibitory activity of 50% methanol PCR extract on TYR, α-GLU, XOD, and acetylcholinesterase (ACHE) was tested. The extract showed a good inhibition on the enzymes, except for ACHE. Therefore, UF-HPLC experiments were carried out to screen TYR, α-GLU, and XOD inhibitors from PCR extract. Seven potential bioactive components were discovered, including methylgallate (1), 1,6-di-O-galloyl-D-glucose (2), polydatin-4′-O-D-glucoside (3), resveratrol-4′-O-D-glucoside (4), polydatin (5), malonyl glucoside resveratrol (6), and resveratrol-5-O-D-glucoside (7). Most of them were found as enzyme inhibitors from PCR for the first time, except polydatin (5), which had been reported as an α-GLUI in PCR in the literature. Finally, molecular docking analysis was applied to validate the interactions of these seven potential active components with the enzymes. Compounds 1–7 were proven as TYR inhibitors, compounds 2, 4–7 were identified as XOD inhibitors, and compounds 4–6 were confirmed as α-GLU inhibitors. In short, the current study provides a good reference for the screening of enzyme inhibitors through UF-HPLC, and provides scientific data for future studies of PCR.

A rapid HPLC-UV method for the determination of three organic acids (neochlorogenic acid, chlorogenic acid, and cryptochlorogenic acid) in Polygoni Vivipari Rhizoma (PVR) by one marker was developed. The sample was prepared by effervescence-assisted matrix solid-phase dispersion (EA-MSPD). The separation of compounds was performed on a Poroshell column. The equal absorption wavelength was set as follows: 292 nm (0∼7 min) and 324 nm (7∼10 min). The analytical time including sample extraction and HPLC separation time was 12 min. The analytical method validation such as accuracy (recoveries 99.85%–106.29% and RSD < 2.9%), precision (RSD < 1.3%), reproducibility (RSD < 1.7%), and stability tests (RSD < 0.7% in 24 h) proved that the established HPLC method was suitable for determination of three organic acids in PVR. The contents of three analytes obtained by the external standard method with three markers and the equal absorption wavelength method with one marker were similar (RSD ≤ 2.0%). The developed method, which is rapid and reference compound saving, is an improved quality evaluation method of PVR.

A correct judgment of the market consists of comprehensive analysis in different aspects. The market timing is one of those important aspects, so this paper focuses on the market timing and proposes three factors which will play the key roles. This study aims to examine the influence of market conditions, culture and politics on the market timing, thus finding out the relationship between these three factors and the market, and giving some advice to the entrepreneurs on how to assess the suitable market timing. The analysis results of this research are as follows. First of all, the increasing income of the customers makes the market capacity increase, or the market will decrease. For example, China has become the second largest economy in the world. The consumption desires of Chinese people is growing as fast as their incomes. Alibaba filled people's demand for fast consumption desires, so it becomes one of the best online e-commerce companies in the world. Besides, because of the background and cultural environment, the customers from different countries have different consumption behaviors. From the case study of pick-up truck, it can be concluded that the negligence of cultural factors can lead to the failure of marketing. Furthermore, the policies of the government play the role as guidance in the market. Taking ceramic industry as an example, the environmental protection policy eliminates the high-pollution enterprises and promotes structure optimization of the ceramic industry in Guangdong, China. Therefore, entrepreneurs should pay more attention to the influences of these three factors, in order to make the best decision for their enterprises.