Publications by authors named "Chun-Yu Sun"

A sputtered FePt(BN, Re, C) film, here boron nitride (BN), was compared to a reference sample FePt(BN, Ag, C). Intrinsically, these films illustrate a high anisotropy field (H) and perpendicular magnetocrystalline anisotropy (K),although the reference sample shows a higher value (H = 69.5 kOe, K = 1.

View Article and Find Full Text PDF

Oral squamous cell carcinoma (OSCC) is the most common cancer of oral and maxillofacial region. A recent clinical research has shown that tumor immune microenvironment (TIME)cells are closely related to immunotherapy sensitivity and OSCC prognosis. Nonetheless, a comprehensive analysis of TIME in OSCC has not been reported.

View Article and Find Full Text PDF

BN is the currently required segregant for perpendicular FePt media. We found that BN can be diffused from the MgTiOBN intermediate layer during a high temperature process. The FePtCAg film sputtered on MgTiOBN layers illustrates higher perpendicular magnetocrystalline anisotropy (K) (1.

View Article and Find Full Text PDF

The relationship between saponin content of in different parts of the organization and expression of ginsenoside biosynthesis related gene was obtained by the correlation analysis between saponin content and gene expression. The 14 tissue parts of were studied, six saponins in Samples (ginsenoside Rg₁, Re, Rb₁, Rc, Rb₂ and Rd), group saponins and total saponins were determined by high performance liquid chromatography and vanillin-sulfuric acid colorimetric method. Simultaneously, the expression levels of 7 ginsenoside biosynthesis related genes ( and ) in different tissues of were determined by Real-time fluorescence quantitative PCR.

View Article and Find Full Text PDF

Panax ginseng is one of the famous rare medicinal herbs, and ginsenosides are the main active ingredient of ginseng is ginsenoside.They can be divided into three chemotypes: oleanane type, protopanaxadiol (PPD) type and the protopanaxatriol (PPT)type. Ginsenosides possess anti-thrombotic, anti-fatigue, anti-aging, cancer control, strengthening the immune system and many other effects.

View Article and Find Full Text PDF
Article Synopsis
  • - The study investigates how the addition of methyl jasmonate (MeJA) affects enzyme gene expression in ginseng hairy roots, focusing on the ginsenoside biosynthetic pathway.
  • - It was found that the optimal MeJA concentration is 6×10⁻⁴ μmol•L⁻¹, applied for 22 days with a peak effect seen at 5 days, which boosts the activity of several key enzymes.
  • - After MeJA treatment, significant increases in the expression of important biosynthetic pathway genes (SQS, SQE, OSC, DS, β-AS) were observed, correlating with enhanced enzymatic activity in the roots.
View Article and Find Full Text PDF

Fifteen tissues of 4-year-old fruit repining stage Jilin ginseng were chosen as materials, six kinds of monomer saponins (ginsenosides Rg1, Re, Rb1, Rc, Rb2 and Rd) content in 15 tissues was measured by HPLC and vanillin-sulfuric acid method. The relative expression of FPS, SQS, SQE, OSC, β-AS and P450 genes in 15 tissues was analyzed by real-time PCR. The correlations between ginseng saponin content in 15 tissues of Jilin ginseng and biosynthetic pathway -related genes were obtained.

View Article and Find Full Text PDF

Objective: To explore ginseng fermentation process by Lactobacillus plantarum, and to make part of total saponins transformed into more reactive ginsenoside Rd.

Method: Microbial fermentation was carried out by still dark culture. Total saponins were extracted by Soxhlet extraction, and determined by UV visible spectrophotometry with colours reaction by vanillin-sulfuric acid.

View Article and Find Full Text PDF