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Recovery efficiency and loss of 15N-labelled urea in a rice–soil system in the upper reaches of the Yellow River basin
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 lostExpand
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Effects of Bt transgenic cotton lines on the cotton bollworm parasitoid Microplitis mediator in the laboratory
Abstract Microplitis mediator (Haliday) is an important endoparasitoid of the cotton bollworm, Helicoverpa armigera (Hubner) in northern China. Interactions among H. armigera, its larval parasitoidExpand
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Isolation and structure of gustastatin from the Brazilian nut tree Gustavia hexapetala.
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 inhibitorsExpand
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New lupane glycosides from Pulsatilla chinensis.
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 beExpand
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Antineoplastic agents. 534. isolation and structure of sansevistatins 1 and 2 from the African Sansevieria ehrenbergii.
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 theExpand
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Effects of six sugars on the longevity, fecundity and nutrient reserves of Microplitis mediator
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 inExpand
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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 toxinExpand
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Four new C21 steroidal glycosides from Cynanchum otophyllum Schneid
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 wallicosideExpand
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Five new C21 steroidal glycosides from Periploca sepium
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 basisExpand
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A New Pregnane and a New Diphenylmethane from the Root Barks of Periploca sepium
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 compoundsExpand
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