Fate and Transport of Steroid Hormones and Veterinary Antibiotics Derived from Cattle Farms

Concentrated animal feeding operations (CAFOs) have been identified as one of the most important sources for the release of animal hormones and veterinary antibiotics into the aquatic environment. Funded by a USDA research grant, Dr. Wei Zheng set out to identify and quantify the environmental fate and transport of several commonly-occurring steroid hormones, veterinary antibiotics, and their metabolites. Findings were published in the following papers: Xiaolin Li, Wei Zheng, Michael L. Machesky, Scott R. Yates, and Michael Katterhenry (2011). Journal of Agricultural and Food Chemistry 2011 59 (18), 10176-10181 DOI: 10.1021/jf202325c Wei Zheng, Xiaolin Li, Scott R. Yates, and Scott A. Bradford (2012). Environmental Science & Technology 46 (10), 5471-5478. DOI: 10.1021/es301551h Xiaolin Li, Wei Zheng, Walton R. Kelly (2013). Science of the Total Environment 445-446, 22-28. DOI: 10.1016/j.scitotenv.2012.12.035 Wei Zheng, Yonghong Zou, Xiaolin Li, Michael L. Machesky (2013). Journal of Hazardous Materials 258-259, 109-115. DOI: 10.1016/j.jhazmat.2013.04.038 Yonghong Zou and Wei Zheng Environmental Science & Technology 2013 47 (10), 5185-5192 DOI: 10.1021/es400624w.U.S. Department of AgricultureOpe

Degradation Kinetics and Mechanism of Antibiotic Ceftiofur in Recycled Water Derived from a Beef Farm

ISTC’s senior research scientist Wei Zheng collaborated with researchers from the Illinois State Water Survey, the U.S. Department of Agriculture, and the University of Illinois to determine the degradation kinetics of ceftiofur in liquid manure. Results were published in Xiaolin Li, Wei Zheng, Michael L. Machesky, Scott R. Yates, and Michael Katterhenry (2011). Journal of Agricultural and Food Chemistry 59(18), 10176-10181. DOI: 10.1021/jf202325c.Ope

Equilibrium problems for Raney densities

The Raney numbers are a class of combinatorial numbers generalising the Fuss--Catalan numbers. They are indexed by a pair of positive real numbers $(p,r)$ with $p>1$ and $0 < r \le p$, and form the moments of a probability density function. For certain $(p,r)$ the latter has the interpretation as the density of squared singular values for certain random matrix ensembles, and in this context equilibrium problems characterising the Raney densities for $(p,r) = (\theta +1,1)$ and $(\theta/2+1,1/2)$ have recently been proposed. Using two different techniques --- one based on the Wiener--Hopf method for the solution of integral equations and the other on an analysis of the algebraic equation satisfied by the Green's function --- we establish the validity of the equilibrium problems for general $\theta > 0$ and similarly use both methods to identify the equilibrium problem for $(p,r) = (\theta/q+1,1/q)$, $\theta > 0$ and $q \in \mathbb Z^+$. The Wiener--Hopf method is used to extend the latter to parameters $(p,r) = (\theta/q + 1, m+ 1/q)$ for $m$ a non-negative integer, and also to identify the equilibrium problem for a family of densities with moments given by certain binomial coefficients.Comment: 13 page

Chinese Cultural Music "Gu Zheng" in Thailand

The research entitled “Chinese Cultural Music “Gu Zheng” in Thailand” is a qualitative researchwhich aims are 1) to study the history and features of Gu Zheng, 2) to study the role of Gu Zheng in Thaisociety, 3) to study institutes that offer “Gu Zheng” lessons, and 4) to improve the educational process ofthe subjects, coded MUE 311 and FA 523 using the results of the research. The results found are asfollows:Gu Zheng is a Chinese musical instrument with a long history and various beliefs as to its origin.According to Chinese history, it is believed that Gu Zheng was created during the era of Emperor Qin ShiHuang by developing an ancient local musical instrument of the Qin region known as “Gu Qin”. However,Gu Zheng went missing due to several wars during the Emperor Qin Shi Huang era. Later whenpeace was restored, a number of arts reformations were initiated. Gu Zheng once again became a part ofChinese society. Gu Zheng has been constantly developed and spread, and now it is widely known inChina and abroad.Gu Zheng is a 21-string plucked zither. Each string is tied to a post at the head, and stretched acrossthe body to the other end where it is tied to another post. These posts are also used to tune the strings.Each string of Gu Zheng is supported by a bridge on the body. The length of a Gu Zheng is around 160cm, the width of the head and the end is around 33 and 29 cm respectively, and the height of the body ofGu Zheng is around 7 cm. The body of Gu Zheng is made of wood covered on both sides and the bottomby wooden slabs keeping the centre of the body hollow as a resonating box. A set of 3 holes are piercedon the bottom slab in the centre and either side to propagate the sound made. The head and the end of GuZheng is often crafted and decorated with pearls or jade stones.Gu Zheng has a role in Thai society, even though learning Gu Zheng is still not among the list ofmusic learners’ preferences. It is restricted to those who are really interested because of the limitedavailability of the instruments, few teachers and steep price of the instrument. Gu Zheng is not includedin the Thai education curriculum, so students only learn from private schools or private teachers. From areligious perspective, Gu Zheng is played in some rituals but it is not essential because it is difficult tofind the players and the instrument is hard to move. Therefore, çKhimé, is played instead. Gu Zheng hasbeen used as a bond in international relations between Thailand and China, especially since ProfessorDr. HRH Princess Chulabhorn Mahidol became interested in Gu Zheng. This has made the relationshipbetween Thailand and China more profound. On the economic front, a rise in people playing Gu Zhenghas seen Gu Zheng classes being taught in several musical institutes in response to society’s needs.There is also an increase in the Chinese musical instrument business, Chinese language and Chinesecalligraphy which has boosted the economy. Thailand and China has had a great relationship for a longtime. It is not difficult to see the harmony between the musical culture of Thailand and China. Gu ZhengmuofChina can play many Thai pieces, highlighting the cultural blend in Thailand. Institutes that offer “GuZheng” lessons from the research:Luang Pradit Pairoh Foundation 47, Setthasiri Road, Samsennai, Phayathai, Bangkok, Thailand 10400Tel: (662) -279-1509Oriental Culture Academy 87, Charatmueang Road, Rongmueang, Pathunmwan, Bangkok, Thailand10330 Tel: (662)-216-2826-8 Fax: (662)-216-2829Silapabunlaeng School Sena Nikhom 1, Phahonyothin 32, Phahonyothin Road, Chankasem,Chatuchak, Bangkok, Thailand 10900 Tel: (662)-9419914-6Fax: (662)-941-9918Suteerattanachaisangkeetsil School 12/33, Moo.11, Latphrao-Wanghin Road, Latphrao, Bangkok,Thailand 10230Nonthasin Ngamwongwan School 619/4142, Ngamwongwan Road, Bangkarso, Mueang districtNonthaburi, Thailand 11000Nonthasin Tiwanon School 37/3, Prinyaluck, Samakkhi Road, ThaSai, Mueang district Nonthaburi,Thailand 11000Gu Zheng is a part of the teaching and learning, MUE 311 (bachelor’s degree) and FA 523 (Master’sdegree), of the Music Education Department, Faculty of Fine &amp; Applied Arts. The students are competent,more practical and their experience of music has increased both in theory and practice. Today, Thaipeople are more interested in Gu Zheng. Private schools have started Gu Zheng courses and have hiredChinese teachers to teach the instrument. At the same time, Thai teachers are gaining knowledge of GuZheng and can compose music for the instrument. This shows the interweaving cultures of Thailand andChina. As a result of this cultural spread, the people are free to apply it to benefit their own culture andsociety.Keywords: Chinese traditional music, Gu Zheng, string instrumen