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- Publications
- Influence
Recovery efficiency and loss of 15N-labelled urea in a rice–soil system in the upper reaches of the Yellow River basin
- Qingwen Zhang, Z. Yang, H. Zhang, J. Yi
- Environmental Science
- 1 September 2012
Abstract Chemical N input is essential for high rice yields. However, low recovery efficiency of chemical fertilizer N with flooding irrigation in the anthropogenic-alluvial soil resulted in N lost… Expand
Effects of Bt transgenic cotton lines on the cotton bollworm parasitoid Microplitis mediator in the laboratory
- X. Liu, Qingwen Zhang, J. Zhao, J. Li, Baoliang Xu, Xiao-Mu Ma
- Biology
- 1 November 2005
Abstract Microplitis mediator (Haliday) is an important endoparasitoid of the cotton bollworm, Helicoverpa armigera (Hubner) in northern China. Interactions among H. armigera, its larval parasitoid… Expand
Isolation and structure of gustastatin from the Brazilian nut tree Gustavia hexapetala.
- G. Pettit, Qingwen Zhang, V. Pinilla, D. Herald, D. Doubek, J. Duke
- Biology, Medicine
- Journal of natural products
- 20 May 2004
A bioassay-guided investigation of Gustavia hexapetala led to the isolation of a new cancer cell growth inhibitor designated gustastatin (1) and four previously known cancer cell growth inhibitors… Expand
New lupane glycosides from Pulsatilla chinensis.
- W. Ye, Qingwen Zhang, W. W. Hsiao, Shouxun Zhao, C. Che
- Biology, Medicine
- Planta medica
- 1 February 2002
Two new lupane glycosides along with five known triterpenoids were isolated from the roots of Pulsatilla chinensis (Ranunculaceae). The structures of the new glycosides were determined to be… Expand
Antineoplastic agents. 534. isolation and structure of sansevistatins 1 and 2 from the African Sansevieria ehrenbergii.
- G. Pettit, Qingwen Zhang, +6 authors J. Schmidt
- Biology, Medicine
- Journal of natural products
- 7 May 2005
Using bioactivity-directed isolation procedures, three new spirostanol saponins designated sansevierin A (1), sansevistatin 1 (2), and sansevistatin 2 (3) were isolated (10(-5) % yield) from the… Expand
Effects of six sugars on the longevity, fecundity and nutrient reserves of Microplitis mediator
- Shu-Ping Luo, J. Li, +4 authors Zhangwu Zhao
- Biology
- 2010
Abstract Parasitoid adults can directly feed on floral nectar and honeydew containing monosaccharides and disaccharides. Oligosaccharides such as maltose, melezitose and raffinose are also found in… Expand
Effects of the Cry1Ac toxin of Bacillus thuringiensis on Microplitis mediator, a parasitoid of the cotton bollworm, Helicoverpa armigera
Interactions between the cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), its larval parasitoid Microplitis mediator (Haliday) (Hymenoptera: Braconidae), and the Cry1Ac toxin… Expand
Four new C21 steroidal glycosides from Cynanchum otophyllum Schneid
- D. Shen, Jin-chao Wei, +7 authors P. Li
- Chemistry
- 1 September 2014
Four new C21 steroidal glycosides, named otophylloside T (2), U (3), V (4) and W (10), together with six known compounds including beishouwubenzophenone (1), the enzymatic hydrolysate of wallicoside… Expand
Five new C21 steroidal glycosides from Periploca sepium
- L. Wang, Z. Yin, Qingwen Zhang, X. Zhang, Wen-Cai Ye
- Chemistry, Medicine
- Steroids
- 1 February 2011
Five new C(21) steroidal glycosides, named periseosides A-E (1-5), along with six known analogues, were isolated from the root barks of Periploca sepium. Their structures were elucidated on the basis… Expand
A New Pregnane and a New Diphenylmethane from the Root Barks of Periploca sepium
- Lei Wang, Zhi-qi Yin, Wen-bin Shen, Qingwen Zhang, Wen-Cai Ye, Wen-Cai Ye
- Chemistry
- 1 August 2007
A new polyoxygenated pregnane genin and a new diphenylmethane, along with five known pregnane derivatives, were isolated from the root barks of Periploca sepium. The structures of the new compounds… Expand