PLANTA
·
2017
·Vol. 246
·期 2
·277-280
·
IF 3.361
Bashandy Hany,Teeri Teemu H.
Main conclusion
Unauthorized genetically engineered orange petunias were found on the market.
Genetic engineering of petunia was shown to lead to novel flower color some 20 years ago. Here we show that petunia lines with orange flowers, generated for scientific purposes, apparently found their way to petunia breeding programmes, intentionally or unintentionally. Today they are widely available, but have not been registered for commerce.
研究领域:
植物学
·
遗传学
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DOI
PubMed
高影响因子
Frontiers in Pharmacology
·
2021
·
IF 5.811
Chen Yuan,Lei Lujing,Bi Yaqiong,Jiang Linlin,Guo Wenfang,Wang Jianhua,Li Minhui
Glehniae Radix (GR) is one of the major medicinal materials in China. The global demand for GR, especially in Asian countries, is constantly increasing, and the supply of wild medicinal materials falls short of the demand. Previous studies have shown that the production and processing modes of different value chains (VCs) impact the quality of medicinal materials. After 4 years of field and market research, this study includes interviews with stakeholders in the VCs, integrates different types of VCs, and further analyzes the VCs. GR characteristics were also assessed; the length and upper-middle diameter of the collected samples were measured, and the effective components of the samples were determined to rank the GR samples according to their quality. The effective components were further analyzed by the K-means clustering method. Concomitantly, the local price (the sales price of the place where the medicinal materials are produced) and market price (the sale price of medicinal materials in the market) of GR in Chifeng, Inner Mongolia, and Anguo, Hebei, were documented, and the ARIMA (Autoregressive Integrated Moving Average) method was used to predict the GR price. Ten VCs are summarized in this article. The results showed that the income of the staff at the beginning of the VC is inadequate. Regarding GR origin, Inner Mongolia GR showed higher quality than that of other areas. As a result, the price of medicinal materials is relatively high, which corresponds to the market price of the survey. The forecast results showed that the market price of GR would increase slightly in the future, which could provide reference for the selection of medicinal materials cultivation in the future. Through the study, it was found that the vertical integration in the VCs of GR could guarantee not only the benefit of the growers but also the traceability of the medicinal materials, which further guarantees the quality of the medicinal materials. However, the complex relationship between the cultivation area and the quality of the medicinal materials is not clear, which should be addressed in future research.
研究领域:
中药学
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植物学
·
药用植物研究
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产品关联
DOI
PubMed
高影响因子
International Journal of Financial Studies
·
2022
·Vol. 11
·期 1
·7
·
IF 0
Mosab I. Tabash,Umaid A. Sheikh,Ali Matar,Adel Ahmed,Dang Khoa Tran
The existing literature has explained the causality flow from the exchange rates toward the stock market without explaining the role of the economic crisis in effecting this nexus. This study examines the role of the financial crisis in affecting the nonlinear causality flowing from the exchange rates toward the stock market indexes of the ASEAN-5 region. The precrisis, postcrisis, and overall sample duration comprised 365, 650, and 1085 observations over the periods from January 2002 to January 2008, January 2010 to January 2020, and January 2002 to January 2020, respectively. The results showed that the conventional symmetrical panel ARDL (PARDL) model was not able to formulate long-run cointegration between currency value fluctuations and stock market indexes for both regimes, i.e., the post recessionary and pre recessionary periods. However, asymmetrical cointegration was established between the currency values and stock market indexes for the pre recessionary period and the overall sampling time frame by utilizing the panel-based NARDL framework (PNARDL). The study suggests practical implications for the exporters and importers to consider the regime as well as both the negative and positive shocks in the international dollar values while making forward contractual agreements.
研究领域:
计量经济学
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金融学
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应用经济学
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DOI
SCIENTIA HORTICULTURAE
·
2022
·
IF 4.342
MeiLing Han,YuHeng Zhao,JiaXin Meng,Jiao Yin,HouHua Li
Flower color is the most important ornamental character trait of Malus species. The study aimed to clarify the roles of phenolic compounds and compositions in the petal color change of Malus spp. cultivars at various flowering stages. Meanwhile, the antioxidant activity in the petals of Malus spp. was detected to estimate the potential of market application. Eight Malus spp. cultivars were divided into four systems according to the flower color, namely dark-red (‘Royalty’ and ‘Perfect Purple’), rose-red (‘Kelsey’ and ‘Sparkler’), pink-red (‘Strawberry Parfait’ and ‘Pink Spires’), and white (‘Jewelberry’ and ‘Snow Drift’). Total phenolic content (TPC), total flavonoid content (TFC), total anthocyanin content (TAC), and antioxidant activity of the petals were measured. The results revealed that high levels of TPC, TFC, TAC, and antioxidant activity in petals significantly decreased during flower development. These indicators were significantly and positively related to each other. Abundant phenolic metabolites in petals were determined by HPLC-DAD, and these compounds included anthocyanins, flavonols, flavanols, flavonones, phenolic acids, and dihydrochalcones. Anthocyanin concentrations and ratios in petals were notably different among the four color systems, with the highest levels noted in dark-red colored flowers, followed by rose-red, pink-red, and white flowers. Cyanidin-3- O -galactoside was the major anthocyanin noted. Its concentration reduced significantly with flower development, which is described as the primary cause of petal color fading. In addition, the petals contained abundance quercetin-3- O -glucuronide, hyperoside, taxifolin, chlorogenic acid, ferulic acid, phloridzin and other substances known for their antioxidant activities. Given these findings, we propose that the flowers of Malus spp. hold good utilization value as new sources of bioaccessible polyphenols and strong potential for development. Especially, the flowers at early stages will be supplements to the natural colorant market.
研究领域:
植物学
·
植物化学
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农学
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产品关联
DOI
高影响因子
Buildings
·
2021
·Vol. 11
·期 8
·363
·
IF 2.648
Liang Xiao,Kunhui Ye,Junhong Zhou,Xiaoting Ye,Ramadhani Said Tekka
Collusive bidding has been an insidious issue in the construction industry. Bidders initiate collusive networks of various sizes to win market shares. The popularity of collusive bidding networks affects market fairness and erodes the interests of market players. Although considerable research efforts were made to diagnose collusive bidding networks, there remains a gap in knowledge regarding the relationships bid riggers use to engage in the networks. Therefore, this study used the social network method, where two hundred sixteen collusion cases were collected from China to test these relationships. The results show that collusive bidding networks were characterized by sparseness, a small scale, a high concentration, and strong randomness. Three types of collusive bidding networks were also detected: contractual, spontaneous, and shadow. Furthermore, these collusive bidding networks had discrepancies regarding participants’ identities, forms of collusive bids, and the determination of bid winners. It was found that the proposed social network model of deliberating bid riggers’ relationships lays a solid foundation for the detection of collusive bidding in the construction sector.
研究领域:
管理科学
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建筑工程
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产业经济学
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反垄断监管
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社会治理
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DOI
高影响因子
BUSINESS HISTORY REVIEW
·
2011
·Vol. 74
·期 4
·611-656
·
IF 0.684
Barry E.C. Boothman
The development of the pulp and paper sector has been a highly controversial subject in Canadian business history. During the 1920s, there was a rapid growth of capacity (which reached twice the level of market demand) and a series of mergers as different firms sought to attain giant size. By 1928 several leading companies were experiencing difficulties, and by 1932 half of the producers were bankrupt while the remainder hovered on the brink of insolvency. These developments had their own logic and were driven by strategic issues and the formation of an institutional market for industrial securities. As corporate executives propelled their firms into dubious strategies characterized by excess production and unrealistic dividend policies, the status of the newsprint producers was obscured from investors by financial and accounting practices, thereby contributing to a flood of investment, which was followed by corporate collapse. The attempts to reorganize the companies began a complex process that lasted anywhere from several years to more than a decade.
研究领域:
商业历史
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公司金融
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产业经济学
·
会计学
·
投资管理
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DOI
高影响因子
VETERINARY MICROBIOLOGY
·
2018
·
IF 2.525
Wenyuan Zhou,Xinhui Li,Lei Shi,Hua H. Wang,He Yan
Methicillin-resistant Staphylococcus aureus (MRSA) has been a major public health concern. In this study, a total of 1485 samples from three swine farms, one slaughterhouse and one indoor market in Xiamen, China were collected in 2015, and the prevalence and profiles of MRSA were assessed. All the MRSA isolates were characterized by molecular typing, antibiotic susceptibility, coagulation activity, as well as PCR screening for 38 antibiotic resistance genes, two mobile genetic elements ( lsa (E)-containing multiresistance gene cluster and Tn 558 ), and 36 virulence genes. During the study, 54 of 1485 (3.6%) samples from the swine production, processing and retail chain were found positive for MRSA. A relatively rare SCC mec XII genotype was prevalent in swine farm (84.6%, 11/13) and slaughterhouse isolates (80.6%, 25/31), but absent in the market isolates (0%, 0/10). Notably, all staphylococcal cassette chromosome mec (SCC mec ) type XII MRSA isolates were resistant to at least 6 classes of antibiotics, carried two mobile genetic elements ( lsa (E)-containing multiresistance gene cluster and Tn 558 ) and harbored multiple virulence genes. These multidrug resistant MRSA isolates could also coagulate both bovine and caprine plasma. Our results on the SCC mec XII MRSA isolates, particularly their profiles of related genotypes, antibiotic resistance and virulence determinants, illustrated the evolvement of livestock-associated (LA)-MRSA in the swine production environment and spread along the processing chain. The dominance of the SCC mec XII in MRSA isolates found in this study, differed from previous reports from China, indicated potential contribution associated with the production process.
研究领域:
微生物学
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公共卫生
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兽医学
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分子生物学
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食品安全
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产品关联
DOI
PubMed
高影响因子
Drug Testing and Analysis
·
2022
·
IF 3.234
Te Xu,Zhen-Yu Niu,Jing Xu,Xin-Duo Li,Quan Luo,An Luo,Yi-Lan Huang,Xing-Tao Jiang,Ze-Hong Wu
Use of electronic cigarettes (e-cigarettes) has increased significantly over the past decade due to consumer perception that these products represent a less risky alternative to combustible cigarettes. E-liquids generally contain a simple mix of vegetable glycerin, propylene glycerol, nicotine, organic acids, and flavourings. Regulators require that harmful and potentially harmful constituents (HPHCs) that might cause harm to the consumer must be monitored in the aerosol generated by e-cigarettes and in cigarette smoke (CS). To quantify HPHCs in aerosols from commercial flavoured e-cigarettes in Chinese market, this study has systematically compared levels of HPHCs, including eight carbonyls, five volatile organic compounds, four tobacco-specific nitrosamines, 16 polycyclic aromatic hydrocarbons, and seven heavy metals, in the aerosols of four market-leading flavoured e-cigarettes and mainstream CS, alongside in vitro cytotoxicity and mutagenicity assays. The vast majority of HPHCs were either undetected or significantly lower in the e-cigarette aerosols than in commercial CS or reference CS (3R4F). Where HPHCs were detected, there were small variations among the different flavoured e-cigarettes. In the neutral red uptake and Ames assays, aqueous extracts of the e-cigarette aerosols did not induce obvious cytotoxicity or mutagenicity, whereas CS aqueous extract showed dose-related cytotoxicity and mutagenicity. Collectively, these results indicate that use of e-cigarettes might potentially lead to a significant reduction in exposure to harmful substances, with fewer cytotoxic and mutagenic effects, as compared with conventional smoking. Further studies based on human puffing conditions and longer evaluation periods will be needed to substantiate this potential.
研究领域:
毒理学
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公共卫生
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烟草控制
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化学分析
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD BIOCHEMISTRY
·
2019
·Vol. 43
·期 11
·e13028
·
IF 1.358
Meiling Han,Ai Li,Ting Shen,Jiaxin Meng,Yongqin Lei,Xian Zhang,Pengyuan Liu,Linxin Gan,Lei Ao,Houhua Li
The study aims to analyze the phenolic compounds in Malus spp. and evaluate their antioxidant and pro-apoptotic effects in BGC-803 gastric cancer cells. The results showed that cyanidin-3-galactoside was the main polyphenol in Malus “Royalty” (MR), while catechin, epicatechin, and proanthocyanidin B1 and B2 contents were higher in Malus “Cinnabar” (MC) and Malus micromalus (MM) than in MR fruits. The total polyphenol content, total flavonoid content, and antioxidative properties of Malus spp. fruits followed an order of MR > MC > MM. Fruit extracts could inhibit BGC-803 cells growth and induce apoptosis, with IC 50 values of 0.47, 0.36, and 0.31 mg/ml for MR, MC, and MM, respectively. Furthermore, fruit extracts induced cell apoptosis through increasing Bcl-2 and Bcl-xl (pro-apoptosis) expression and inhibiting Bax and Bak (anti-apoptosis) expression, thereby accelerating cell apoptosis. Taken together, these results demonstrate that red fruits (i.e., MR and MC) were more effective against cancer cells than green fruits (i.e., MM). Practical applications Fruits of Malus spp. are ≤5 cm in size, considerably smaller than apples. They are rich in various natural bioactive compounds that are often consumed as a dietary supplement or used as natural raw materials for function food. In the current study, it is comprehensively characterized profile and bioactivity of phenolic metabolites in Malus spp. fruits of different colors, and found that red fruits are more effective in reducing the free radicals and inducing cancer cells apoptosis than green fruits. These findings are valuable for food technologists and food manufacturers, especially those who produce crabapple supplement. The study investigated the molecular mechanism of how Malus spp. fruits exert anti-cancer functions. This lays a theoretical foundation for future research on developing anti-cancer function food and provides helpful guidance for fruit market management and fruit processing industry.
研究领域:
药理学
·
肿瘤学
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食品科学
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植物科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）