1,721,705 research outputs found
New species and records of the Neoserica (sensu stricto) group (Coleoptera: Scarabaeidae: Sericini)
No full textLiu, Wan-Gang, Bai, Ming, Yang, Xing-Ke, Ahrens, Dirk (2015): New species and records of the Neoserica (sensu stricto) group (Coleoptera: Scarabaeidae: Sericini). Journal of Natural History 49 (39): 2379-2395, DOI: 10.1080/00222933.2015.103420
Financial Development and Innovation in China: Evidence from the Provincial Data. WP Series Kiel Institute for the World Economy (ISSN 1862-1155), kwp_1673
No full textDevelopment and validation of an improved method for determination of chloropropanols in paperboard food packaging by GC-MS
No full textPaper used for food packaging is often manufactured with wet strength resin additives to impart moisture resistance. Wet strength resins formulated with epichlorohydrin form undesirable chloropropanol type by-products including 3-chloro-1,2-propanediol (3-MCPD) and 1,3-dichloro-2-propanol(1,3-DCP). Chloropropanols are suspect carcinogens. These compounds were recently added to the California Proposition 65 list (known or suspect human carcinogens) which mandates labeling of products sold in the state of California, creating a dilemma for food packaging processors. Food packaging manufacturers are concerned with migration of chloropropanols from packaging into foods or beverages. Therefore, analytical methods for determination of chloropropanols in paperboard food packaging are of great importance. However, previously described methods are not developed for paperboard food packaging samples, or not for EU standard aqueous extraction study of paperboard samples. The objective of this research is to develop an improved analytical method for determination of 3-MCPD and 1,3-DCP in paper type food packaging. The refined method uses aqueous extraction, matrix-spiking of a deuterated surrogate internal standard (3-MCPD-d5), cleanup using Extrelut solid phase extraction, derivatization using silylation reagent, and GC-MS analyses of the chloropropanols as their corresponding trimethyl silyl ethers. The new method is applicable to paper type food packaging sample for EU standard aqueous extraction study and aqueous food stimulant migration test. Also, the method uses 10 times less sample size, solvents and reagents than previously described methods, reducing the cost and time for analysis. The derivatization procedure was also improved. The overall validation data suggest the method is precise and rugged. The limit of detection of aqueous extract is 0.010 ppm (w/w) for both 3-MCPD and 1,3-DCP. Analytical system precision is 3.36%RSD for 3-MCPD and 7.65%RSD for 1,3-DCP. The new method has been applied to the analysis of over 100 commercial paperboard packaging samples. The data is being used to guide development of next generation wet strength resins with reduced chloropropanols content, and also used for risk assessments to calculate VSD (virtual safe dose).M.S.Includes bibliographical referencesby Wan-yun Li
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Neoserica grossepunctata Ahrens 2003
No full textNeoserica (s. str.) grossepunctata Ahrens, 2003 Material examined 2 ex. ‘ Laos (west): Oudomxao province, Beng, 20.20° N, 101.80° E May 1–14.2010 local collectors of Li Jingke’ (ZFMK).Published as part of Liu, Wan-Gang, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2015, New species and records of the Neoserica (sensu stricto) group (Coleoptera: Scarabaeidae: Sericini), pp. 2379-2395 in Journal of Natural History 49 (39) on page 2392, DOI: 10.1080/00222933.2015.1034208, http://zenodo.org/record/400014
Figure 4 in New species and records of the Neoserica (sensu stricto) group (Coleoptera: Scarabaeidae: Sericini)
No full textFigure 4. Distribution of Neoserica (s. str.) fanjingshanica, N. (s. str.) grossepunctata, N. (s. str.) lucidifrons, N. (s. str.) phuphanensis, N. (s. str.) shibingensis and N. (s. str.) unicolor.Published as part of Liu, Wan-Gang, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2015, New species and records of the Neoserica (sensu stricto) group (Coleoptera: Scarabaeidae: Sericini), pp. 2379-2395 in Journal of Natural History 49 (39) on page 2392, DOI: 10.1080/00222933.2015.1034208, http://zenodo.org/record/400014
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Maladera nigrobrunnea Fabrizi & Liu & Bai & Yang & Ahrens 2021, comb. n.
No full textMaladera nigrobrunnea (Moser, 1926) comb. n. Figures 75 E–H, 128Published as part of Fabrizi, Silvia, Liu, Wan-Gang, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2021, A monograph of the genus Maladera Mulsant & Rey, 1871 of China (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), pp. 1-400 in Zootaxa 4922 (1) on page 318, DOI: 10.11646/zootaxa.4922.1.1, http://zenodo.org/record/449631
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