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1. On graphs having minimal fourth adjacency coefficient

Author

Gong, Shi Cai and Sun, Shi Wei

Subjects
Mathematics - Combinatorics
Abstract

Let $G$ be a graph with order $n$ and adjacency matrix $\mathbf{A}(G)$. The adjacency polynomial of $G$ is defined as $\phi(G;\lambda) =det(\lambda\mathbf{I}-\mathbf{A}(G))=\sum_{i=0}^n\mathbf{a_i}(G)\lambda^{n-i}$. Hereafter, $\mathbf{a}_i(G)$ is called the $i$-th adjacency coefficient of $G$. Denote by $\mathfrak{G}_{n,m}$ the set of all connected graphs having $n$ vertices and $m$ edges. A graph $G$ is said $4$-Sachs minimal if $$\mathbf{a}_4(G)=min\{\mathbf{a}_4(H)|H\in \mathfrak{G}_{n,m}\}.$$ The value $min\{\mathbf{a}_4(H)|H\in \mathfrak{G}_{n,m}\}$ is called the minimal $4$-Sachs number in $\mathfrak{G}_{n,m}$, denoted by $\bar{\mathbf{a}}_4(\mathfrak{G}_{n,m})$. In this paper, we study the relationship between the value $\mathbf{a}_4(G)$ and its structural properties. Especially, we give a structural characterization on $4$-Sachs minimal graphs, showing that each $4$-Sachs minimal graph contains a difference graph as its spanning subgraph (see Theorem 8). Then, for $n\ge 4$ and $n-1\le m\le 2n-4$, we determine all $4$-Sachs minimal graphs together with the corresponding minimal $4$-Sachs number $\bar{\mathbf{a}}_4(\mathfrak{G}_{n,m})$., Comment: 17 pages

Published
2020

5. The LAMOST Survey of Background Quasars in the Vicinity of the Andromeda and Triangulum Galaxies -- II. Results from the Commissioning Observations and the Pilot Surveys

Author

Huo, Zhi-Ying, Liu, Xiao-Wei, Xiang, Mao-Sheng, Yuan, Hai-Bo, Huang, Yang, Zhang, Hui-Hua, Yan, Lin, Bai, Zhong-Rui, Chen, Jian-Jun, Chen, Xiao-Yan, Chu, Jia-Ru, Chu, Yao-Quan, Cui, Xiang-Qun, Du, Bing, Hou, Yong-Hui, Hu, Hong-Zhuan, Hu, Zhong-Wen, Jia, Lei, Jiang, Fang-Hua, Lei, Ya-Juan, Li, Ai-Hua, Li, Guang-Wei, Li, Guo-Ping, Li, Jian, Li, Xin-Nan, Li, Yan, Li, Ye-Ping, Liu, Gen-Rong, Liu, Zhi-Gang, Lu, Qi-Shuai, Luo, A-Li, Luo, Yu, Men, Li, Ni, Ji-Jun, Qi, Yong-Jun, Qi, Zhao-Xiang, Shi, Jian-Rong, Shi, Huo-Ming, Sun, Shi-Wei, Tang, Zheng-Hong, Tian, Yuan, Tu, Liang-Ping, Wang, Dan, Wang, Feng-Fei, Wang, Gang, Wang, Jia-Ning, Wang, Lei, Wang, Shu-Qing, Wang, You, Wang, Yue-Fei, Wei, Ming-Zhi, Wu, Yue, Xue, Xiang-Xiang, Yao, Zheng-Qiu, Yu, Yong, Yuan, Hui, Zhai, Chao, Zhang, En-Peng, Zhang, Hao-Tong, Zhang, Jian-Nan, Zhang, Wei, Zhang, Yan-Xia, Zhang, Yong, Zhang, Zhen-Chao, Zhao, Gang, Zhao, Ming, Zhao, Yong-Heng, Zhou, Fang, Zhou, Xin-Lin, Zhu, Yong-Tian, and Zou, Si-Cheng

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present new quasars discovered in the vicinity of the Andromeda and Triangulum galaxies with the LAMOST during the 2010 and 2011 observational seasons. Quasar candidates are selected based on the available SDSS, KPNO 4 m telescope, XSTPS optical, and WISE near infrared photometric data. We present 509 new quasars discovered in a stripe of ~135 sq. deg from M31 to M33 along the Giant Stellar Stream in the 2011 pilot survey datasets, and also 17 new quasars discovered in an area of ~100 sq. deg that covers the central region and the southeastern halo of M31 in the 2010 commissioning datasets. These 526 new quasars have i magnitudes ranging from 15.5 to 20.0, redshifts from 0.1 to 3.2. They represent a significant increase of the number of identified quasars in the vicinity of M31 and M33. There are now 26, 62 and 139 known quasars in this region of the sky with i magnitudes brighter than 17.0, 17.5 and 18.0 respectively, of which 5, 20 and 75 are newly-discovered. These bright quasars provide an invaluable collection with which to probe the kinematics and chemistry of the ISM/IGM in the Local Group of galaxies. A total of 93 quasars are now known with locations within 2.5 deg of M31, of which 73 are newly discovered. Tens of quasars are now known to be located behind the Giant Stellar Stream, and hundreds behind the extended halo and its associated substructures of M31. The much enlarged sample of known quasars in the vicinity of M31 and M33 can potentially be utilized to construct a perfect astrometric reference frame to measure the minute PMs of M31 and M33, along with the PMs of substructures associated with the Local Group of galaxies. Those PMs are some of the most fundamental properties of the Local Group., Comment: 26 pages, 6 figures, AJ accepted

Published
2013
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22. Formation of hydroperoxo (–OOH) species on the surface of self-doped Bi2.15WO6: reactivity towards As(III) oxidation.

Author

Wang, Xiang-Ming, Wu, Song-Hai, Ren, Hai-Tao, Zhu, Peng-Yue, Wang, Cong, Liu, Yong, Sun, Shi-Wei, Zhang, Xiao-Cong, Lin, Yi-Ying, Meng, Zi-He, Jia, Shao-Yi, and Han, Xu

Abstract

Bi2+xWO6 is a cost-effective and environmentally friendly photocatalyst that shows high reactivity in the oxidation of various contaminants under visible light. However, under alkaline conditions, the reactive oxidative species in the Bi2+xWO6 system are still not clear yet. In this study, it is observed that the oxidation rates of As(III) increase with increasing pH values in the Bi2.15WO6 system. Photoluminescence and the Mott–Schottky analyses confirm that OH− promotes the separation and transfer of photogenerated electron–hole pairs over Bi2.15WO6, thus facilitating the oxidation of As(III). Electron spin resonance spectra analysis and quenching experiments rule out contributions of •OH, O2˙−, 1O2 and superoxo species to As(III) oxidation and indicate that surface –OOH and/or H2O2 are indeed the predominant species under alkaline conditions. The improved production of H2O2 by H-donors such as glucose and phenol, as well as the UV-vis diffuse reflectance and Raman analyses, further confirms the formation of surface –OOH on Bi2.15WO6 under alkaline conditions. In the dark, the significant higher oxidation rate of As(III) by H2O2–Bi2.15WO6 than that by H2O2 alone reveals that surface −OOH, instead of H2O2, plays an important role in As(III) oxidation. This study enriches our understanding of the diversity of reactive oxygen species (ROS) in the Bi2.15WO6 system and gives new insight into the mechanism involved in the oxidation of As(III) under alkaline conditions. [ABSTRACT FROM AUTHOR]

Published
2020
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26. Formation and Oxidation Reactivity of MnO2+(HCO3–)nin the MnII(HCO3–)–H2O2System

Author

Meng, Zi-He, Wu, Song-Hai, Sun, Shi-Wei, Xu, Zhi, Zhang, Xiao-Cong, Wang, Xiang-Ming, Liu, Yong, Ren, Hai-Tao, Jia, Shao-Yi, Bai, He, and Han, Xu

Abstract

The MnII(HCO3–)–H2O2(MnII-BAP) system shows high reactivity toward oxidation of electron-rich organic substrates; however, the predominant oxidizing species and its formation pathways involved in the MnII-BAP system are still under debate. In this study, we used the MnII-BAP system to oxidize As(III) in that As(III), Mn2+, and HCO3–are common components in As(III)-contaminated groundwater. Kinetic results show that MnII(HCO3–)n[including MnII(HCO3)+and MnII(HCO3)2] is a key factor in the MnII-BAP system to oxidize As(III). Quenching experiments rule out contributions of OH•and 1O2to As(III) oxidation and reveal that O2•–and the oxidizing species generated from O2•–play predominant roles in the oxidation of As(III). We further reveal that the MnO2+(HCO3–)nintermediate generated in the reaction between MnII(HCO3–)nand O2•–, instead of O2•–, is the predominant oxidizing species. Although CO3•–also contributes to As(III) oxidation, the high reaction rate constant between CO3•–and O2•–indicates that CO3•–is not the predominant oxidizing species in the As(III)-MnII-BAP system. In addition, the presence of Mn(III) further indicates the important Mn(II)–Mn(III) cycling in the MnII-BAP system. We therefore suggest two important roles of MnII(HCO3–)nin the MnII-BAP system: (i) MnII(HCO3–)nreacts with H2O2to form the MnIII(HCO3)3intermediate, followed by a subsequent reaction between MnIII(HCO3)3and H2O2to produce O2•–; (ii) MnII(HCO3–)ncan also stabilize O2•–with the formation of MnO2+(HCO3–)n. MnO2+(HCO3–)nis an electrophilic reagent and plays the predominant role in the oxidation of As(III) to As(V).

Published
2020
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27. Degradation of polyvinyl alcohol by a novel bacterial strain Stenotrophomonas sp. SA21.

Author

Ullah, Munzer, Weng, Cai-hong, Li, Hui, Sun, Shi-wei, Zhang, Hong, Song, Ai-huan, and Zhu, Hu

Subjects
POLYVINYL alcohol, CHEMICAL decomposition, WASTEWATER treatment
Abstract

In this study, polyvinyl alcohol (PVA)-degrading bacteria were screened from oil sludge using PVA as a sole source of carbon in the culture medium. A novel strain, SA21, was obtained and identified as a member of the Stenotrophomonas genus based on the analysis of a partial 16S rDNA nucleotide sequence, morphological and biochemical characteristics, and phylogenetic analysis. This Stenotrophomonas isolate had not previously been reported as a PVA-degrading bacterium. Stenotrophomonas sp. strain SA21 degraded 90% of the PVA present in the culture medium after 4 days. The effect of nitrogen sources on the production of PVA-degrading enzyme involved in the biodegradation process was significant, and the enzymatic activity reached 82 U/ml when ammonium nitrate or urea was used in the optimized medium. The information obtained in this study will provide a foundation for improving industrial wastewater treatment. Abbreviations: DCW: dry cell weight; FTIR: Fourier Transform Infrared Spectroscopy; NCBI: National Center for Biotechnology Information; PCR: polymerase chain reaction; PVA: polyvinyl alcohol; SEM: scanning electron microscope [ABSTRACT FROM AUTHOR]

Published
2018
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28. Hemoclip-reinforced and EUS-assisted band ligation as an effective and safe technique to treat small GISTs in the gastric fundus

Author

Wang Sheng, Ge Nan, Sun Shi-wei, Sun Siyu, and Liu Xiang

Subjects
Male, medicine.medical_specialty, Gastrointestinal Stromal Tumors, Perforation (oil well), Blood Loss, Surgical, Endoscopic ultrasonography, Endosonography, Stomach Neoplasms, Gastroscopy, medicine, Biomarkers, Tumor, Humans, Gastric Fundus, Ligation, Aged, Retrospective Studies, Hepatology, Gastric fundus, business.industry, Gastroenterology, Middle Aged, Surgical Instruments, Immunohistochemistry, digestive system diseases, Surgery, Treatment Outcome, Female, business, Follow-Up Studies
Abstract

To the Editor: Endoscopic ultrasonography (EUS)-assisted band ligation has been proven to be a safe and effective procedure to treat small gastrointestinal stromal tumors (GISTs) (1,2,3) except for the relatively high risk of post-ligation perforation of the gastric fundus (4). The purpose of this study was to evaluate an improved ligation technique by placing 4–5 hemoclips around the ligation band to prevent peroration.

Published
2011

34. THE LAMOST SURVEY OF BACKGROUND QUASARS IN THE VICINITY OF THE ANDROMEDA AND TRIANGULUM GALAXIES. II. RESULTS FROM THE COMMISSIONING OBSERVATIONS AND THE PILOT SURVEYS

Author

Huo, Zhi-Ying, primary, Liu, Xiao-Wei, additional, Xiang, Mao-Sheng, additional, Yuan, Hai-Bo, additional, Huang, Yang, additional, Zhang, Hui-Hua, additional, Yan, Lin, additional, Bai, Zhong-Rui, additional, Chen, Jian-Jun, additional, Chen, Xiao-Yan, additional, Chu, Jia-Ru, additional, Chu, Yao-Quan, additional, Cui, Xiang-Qun, additional, Du, Bing, additional, Hou, Yong-Hui, additional, Hu, Hong-Zhuan, additional, Hu, Zhong-Wen, additional, Jia, Lei, additional, Jiang, Fang-Hua, additional, Lei, Ya-Juan, additional, Li, Ai-Hua, additional, Li, Guang-Wei, additional, Li, Guo-Ping, additional, Li, Jian, additional, Li, Xin-Nan, additional, Li, Yan, additional, Li, Ye-Ping, additional, Liu, Gen-Rong, additional, Liu, Zhi-Gang, additional, Lu, Qi-Shuai, additional, Luo, A-Li, additional, Luo, Yu, additional, Men, Li, additional, Ni, Ji-Jun, additional, Qi, Yong-Jun, additional, Qi, Zhao-Xiang, additional, Shi, Jian-Rong, additional, Shi, Huo-Ming, additional, Sun, Shi-Wei, additional, Tang, Zheng-Hong, additional, Tian, Yuan, additional, Tu, Liang-Ping, additional, Wang, Dan, additional, Wang, Feng-Fei, additional, Wang, Gang, additional, Wang, Jia-Ning, additional, Wang, Lei, additional, Wang, Shu-Qing, additional, Wang, You, additional, Wang, Yue-Fei, additional, Wei, Ming-Zhi, additional, Wu, Yue, additional, Xue, Xiang-Xiang, additional, Yao, Zheng-Qiu, additional, Yu, Yong, additional, Yuan, Hui, additional, Zhai, Chao, additional, Zhang, En-Peng, additional, Zhang, Hao-Tong, additional, Zhang, Jian-Nan, additional, Zhang, Wei, additional, Zhang, Yan-Xia, additional, Zhang, Yong, additional, Zhang, Zhen-Chao, additional, Zhao, Gang, additional, Zhao, Ming, additional, Zhao, Yong-Heng, additional, Zhou, Fang, additional, Zhou, Xin-Lin, additional, Zhu, Yong-Tian, additional, and Zou, Si-Cheng, additional

Published
2013
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36. Data release of the LAMOST pilot survey

Author

Luo, A-Li, primary, Zhang, Hao-Tong, additional, Zhao, Yong-Heng, additional, Zhao, Gang, additional, Cui, Xiang-Qun, additional, Li, Guo-Ping, additional, Chu, Yao-Quan, additional, Shi, Jian-Rong, additional, Wang, Gang, additional, Zhang, Jian-Nan, additional, Bai, Zhong-Rui, additional, Chen, Xiao-Yan, additional, Wang, Feng-Fei, additional, Guo, Yan-Xin, additional, Chen, Jian-Jun, additional, Du, Bing, additional, Kong, Xiao, additional, Lei, Ya-Juan, additional, Li, Yin-Bi, additional, Song, Yi-Han, additional, Wu, Yue, additional, Zhang, Yan-Xia, additional, Zhou, Xin-Lin, additional, Zuo, Fang, additional, Du, Peng, additional, He, Lin, additional, Hou, Wen, additional, Dong, Yi-Qiao, additional, Li, Jian, additional, Li, Guang-Wei, additional, Li, Shuang, additional, Song, Jing, additional, Tian, Yuan, additional, Wang, Meng-Xin, additional, Wu, Ke-Fei, additional, Yang, Hui-Qin, additional, Yuan, Hai-Long, additional, Cao, Shu-Yun, additional, Chen, Hai-Yuan, additional, Chen, Kun-Xin, additional, Chen, Ying, additional, Chu, Jia-Ru, additional, Feng, Lei, additional, Gong, Xue-Fei, additional, Gu, Bo-Zhong, additional, Hou, Yong-Hui, additional, Huo, Zhi-Ying, additional, Hu, Hong-Zhuan, additional, Hu, Ning-Sheng, additional, Hu, Zhong-Wen, additional, Jia, Lei, additional, Jiang, Fang-Hua, additional, Jiang, Xiang, additional, Jiang, Zi-Bo, additional, Jin, Ge, additional, Li, Ai-Hua, additional, Li, Qi, additional, Li, Xin-Nan, additional, Li, Yan, additional, Li, Ye-Ping, additional, Liu, Gen-Rong, additional, Liu, Guan-Qun, additional, Liu, Zhi-Gang, additional, Lu, Qi-Shuai, additional, Lu, Wen-Zhi, additional, Luo, Yu, additional, Mao, Yin-Dun, additional, Men, Li, additional, Ni, Ji-Jun, additional, Qi, Yong-Jun, additional, Qi, Zhao-Xiang, additional, Shi, Huo-Ming, additional, Su, Ding-Qiang, additional, Sun, Shi-Wei, additional, Su, Hong-Jun, additional, Tang, Zheng-Hong, additional, Tao, Qing-Sheng, additional, Tu, Liang-Ping, additional, Wang, Da-Qing, additional, Wang, Dan, additional, Wang, Guo-Min, additional, Wang, Hai, additional, Wang, Jia-Ning, additional, Wang, Jian, additional, Wang, Jian-Ling, additional, Wang, Jian-Ping, additional, Wang, Lei, additional, Wang, Shou-Guan, additional, Wang, Shu-Qing, additional, Wang, Ya-Nan, additional, Wang, You, additional, Wang, Yue-Fei, additional, Wei, Ming-Zhi, additional, Xue, Xiang-Xiang, additional, Xing, Xiao-Zheng, additional, Xu, Ling-Zhe, additional, Xu, Xin-Qi, additional, Xu, Yan, additional, Yang, De-Hua, additional, Yang, Shi-Hai, additional, Yao, Zheng-Qiu, additional, Yu, Yong, additional, Yuan, Hui, additional, Zhai, Chao, additional, Zhang, En-Peng, additional, Zhang, Jing, additional, Zhang, Li-Ping, additional, Zhang, Wei, additional, Zhang, Yong, additional, Zhang, Zhen-Chao, additional, Zhao, Ming, additional, Zhou, Fang, additional, Zhu, Yong-Tian, additional, Zhu, Jie, additional, and Zou, Si-Cheng, additional

Published
2012
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39. Eight new quasars discovered by the Guoshoujing Telescope (LAMOST) in one extragalactic field

Author

Wu, Xue-Bing, primary, Jia, Zhen-Dong, additional, Chen, Zhao-Yu, additional, Zuo, Wen-Wen, additional, Zhao, Yong-Heng, additional, Luo, A-li, additional, Bai, Zhong-Rui, additional, Chen, Jian-Jun, additional, Zhang, Hao-Tong, additional, Yan, Hong-Liang, additional, Ren, Juan-Juan, additional, Sun, Shi-Wei, additional, Wu, Hong, additional, Zhang, Yong, additional, Li, Ye-Ping, additional, Lu, Qi-Shuai, additional, Wang, You, additional, Ni, Ji-Jun, additional, Wang, Hai, additional, Kong, Xu, additional, and Shen, Shi-Yin, additional

Published
2010
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40. A very bright (i= 16.44) quasar in the ‘redshift desert’ discovered by the Guoshoujing Telescope (LAMOST)

Author

Wu, Xue-Bing, primary, Chen, Zhao-Yu, additional, Jia, Zhen-Dong, additional, Zuo, Wen-Wen, additional, Zhao, Yong-Heng, additional, Luo, A-Li, additional, Bai, Zhong-Rui, additional, Chen, Jian-Jun, additional, Zhang, Hao-Tong, additional, Yan, Hong-Liang, additional, Ren, Juan-Juan, additional, Sun, Shi-Wei, additional, Wu, Hong, additional, Zhang, Yong, additional, Li, Ye-Ping, additional, Lu, Qi-Shuai, additional, Wang, You, additional, Ni, Ji-Jun, additional, Wang, Hai, additional, Kong, Xu, additional, and Shen, Shi-Yin, additional

Published
2010
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42. New background quasars in the vicinity of the Andromeda Galaxy discovered with the Guoshoujing Telescope (LAMOST)

Author

Huo, Zhi-Ying, primary, Liu, Xiao-Wei, additional, Yuan, Hai-Bo, additional, Zhang, Hui-Hua, additional, Zhao, Yong-Heng, additional, Chen, Jian-Jun, additional, Bai, Zhong-Rui, additional, Zhang, Hao-Tong, additional, Zhang, Hua-Wei, additional, García-Benito, Ruben, additional, Xiang, Mao-Sheng, additional, Yan, Hong-Liang, additional, Ren, Juan-Juan, additional, Sun, Shi-Wei, additional, Zhang, Yong, additional, Li, Ye-Ping, additional, Lu, Qi-Shuai, additional, Wang, You, additional, Ni, Ji-Jun, additional, and Wang, Hai, additional

Published
2010
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43. New planetary nebulae in the outskirts of the Andromeda Galaxy discovered with the Guoshoujing Telescope (LAMOST)

Author

Yuan, Hai-Bo, primary, Liu, Xiao-Wei, additional, Huo, Zhi-Ying, additional, Zhang, Hui-Hua, additional, Zhao, Yong-Heng, additional, Chen, Jian-Jun, additional, Bai, Zhong-Rui, additional, Zhang, Hao-Tong, additional, Zhang, Hua-Wei, additional, García-Benito, Ruben, additional, Xiang, Mao-Sheng, additional, Yan, Hong-Liang, additional, Ren, Juan-Juan, additional, Sun, Shi-Wei, additional, Zhang, Yong, additional, Li, Ye-Ping, additional, Lu, Qi-Shuai, additional, Wang, You, additional, Ni, Ji-Jun, additional, and Wang, Hai, additional

Published
2010
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45. Identification and expression analysis of novel LAGE-1 alleles with single nucleotide polymorphisms in cancer patients

Author

Shao, Yi, primary, Sun, Zhen-yuan, additional, Sun, Shi-wei, additional, Zhao, Yi, additional, Sin, Wan Yee, additional, Yuan, Yan-hua, additional, Simpson, Andrew J., additional, Old, Lloyd J., additional, Sang, Xin-ting, additional, Mao, Yi-lei, additional, Xie, Yong, additional, Huang, Jie-fu, additional, and Zhao, Hai-tao, additional

Published
2007
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47. Three new polyketides from marine-derived fungus Aspergillus glaucus HB1-19.

Author

Sun, Shi-Wei, Ji, Chang-Zhu, Gu, Qian-Qun, Li, De-Hai, and Zhu, Tian-Jiao

Subjects
*ASPERGILLUS, *EXPERIMENTAL design, *MACROLIDE antibiotics, *RESEARCH funding, *PLANT extracts, *FREE radical scavengers
Abstract

Two new benzyl derivatives, aspergentisyl A (1) and aspergentisyl B (2), as well as one new naphthoquinone derivative, aspergiodiquinone (3), together with seven known prenylated benzaldehyde derivatives (4–10) were isolated from the marine-derived fungus Aspergillus glaucus HB1-19. The structures of these compounds were characterized based on 1D and 2D NMR spectra analyses and comparison with those reported in the literature. In addition, each isolate was tested for its 1,1-diphenyl-2-picrylhydrazyl radical-scavenging property and all these compounds except compound 3 exhibited strong radical-scavenging activity. [ABSTRACT FROM AUTHOR]

Published
2013
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49. Polyvinyl alcohol degradation by Bacillus cereusRA23 from oil sludge sample

Author

Ullah, Munzer, Li, Hui, Sun, Shi-Wei, Weng, Cai-Hong, Zhang, Hong, and Zhu, Hu

Abstract

A novel polyvinyl alcohol (PVA)-degrading strain Bacillus cereusRA23 was isolated from an oil sludge sample and environmental factors affecting its PVA degradation efficiency were optimized in detail. Inorganic nitrogen source, ammonium chloride (NH4Cl), was found to be the best nitrogen source and enhanced the PVA degradation rate greatly. The optimal medium for PVA biodegradation consisted of (g/L) PVA 1, NH4Cl 1, K2HPO41.6, MgSO4·7H2O 0.05, FeSO4·6H2O 0.02, CaCl20.05, NaCl 0.02. The optimal temperature and pH for PVA biodegradation by strain RA23 was 28 °C and 7.0, respectively, and 85% of 0.1% PVA was degraded after 5 days under these conditions. FTIR studies showed that the carboxylic acids (possibly including aldehyde or ketone) could be the intermediate product of PVA biodegradation. The investigation of strain RA23 for PVA degradation will provide important information to facilitate the removal of wastewater pollution in industrial zones.

Published
2019
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