Ya Yi Hou

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Male Sprague-Dawley (SD) rats were exposed to 4-t-nonylphenol (NP) by gavage at dosages of 0, 125 and 250 mg/kg/day for 50 days. Organ weights of liver, kidney, testis and epididymis were measured. Sperm number in the head of epididymis was counted. Several hormones including testosterone, luteinizing hormone and follicle stimulating hormone were measured.(More)
AIM To evaluate the potential therapeutic effect of liposomal gene delivery, genes encoding for human thymosin alpha1 (Talpha1) and interferon omega1 were injected via the tail vein into mice bearing a Hep-A-22 liver tumor. METHODS The cDNA of human Talpha1 and interferon omega1 were obtained by synthesis or reverse transcription-polymerase chain reaction(More)
BACKGROUND Human migration from the karst area to the non-karst area is an important approach for the restoration of degraded karst ecosystems. However, the effects of human-induced land-use change on soil properties are still unclear. The objective of this study was to investigate the effects of land use and parent material on soil organic carbon (SOC) and(More)
The sensitivity of the bleomycin assay for loosely-bound iron depends on the concentration of bleomycin and ascorbic acid and the pH of the reaction. The non-haem-iron proteins transferrin, conalbumin and ferritin release iron at an acid pH value, whereas the haem-iron proteins release iron more readily at an alkaline pH. In addition, haem proteins are(More)
This paper studied the effects of planting pattern and bare rock ratio on the spatial distribution of soil nutrients in Karst depression area of northwest Guangxi. The results showed that planting pattern had significant effects on soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP), total potassium (TK), available nitrogen (AN), available(More)
OBJECTIVE To analyze nucleosides and nucleobases of Pseudostellariae Radix cultivated in different idibplasni resources and to compare the differences. METHODS QTRAP LC-MS/MS method was applied for the analysis of 13 kinds of nucleosides and nucleobases in Pseudostellariae Radix and the data obtained was analyzed by SPSS 16. 0 software. RESULTS There(More)
Selecting the main land use types (shrub land, secondary forest land, orchard, pasture land, and upland) at the peak-cluster depression in karst region of Northwest Guangxi as test objects, this paper studied the effects of different land use types on soil nutrients. The results showed that, the contents of soil organic matter (SOM), total N, and available(More)
The conversion from triene- to diene-typed ansamycins is clarified step by step in Streptomyces seoulensis IFB-A01. Such an intertype convertibility is adopted to establish for the first time the simultaneous mutasynthesis of both types of C17-benzene ansamycins (C17BAs). Three of the newly generated unnatural compounds showed potent cytotoxicity.
AIMS Toll-like receptor (TLR)-7 agonists have been used in cancer immunotherapy, but tumour heterogeneity means that TLR-7 activity is variable in different components of the tumour microenvironment and the characteristics of TLR-7 in oral squamous cell carcinoma (OSCC) are unclear. METHODS AND RESULTS Twenty healthy oral tissues, 50 oral leukoplakia(More)
The endophytic fungus Guignardia mangiferae isolated from Ilex cornuta leaves was shown to produce a family of meroterpenes with toll-like receptor 3 regulating activity (1-9), of which 1-3 possessed new structures. The absolute stereochemistry of 1-3 was assigned through a combination of nuclear magnetic resonance experiments, chemical derivation, CD(More)