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Face Detection and Extraction Based on Ellipse Clustering Method in YCbCr Space
Jia, Shi,Woo, Chong-Ho Korea Multimedia Society 2010 멀티미디어학회논문지 Vol.13 No.6
In this paper a method for detecting and extracting the face from the image in YCbCr spaceis proposed. The face region is obtained from the complex original image by using the difference method and the face color information is taken from the reduced face region throughthe Ellipse clustering method. The experimental results showed that the proposed method can efficiently detect and extract the face from the original image under the general light intensity except for low luminance.
Jia-Huan Shang,Wen-Jie Sun,Hong-Tao Zhu,Dong Wang,Chong-Ren Yang,Ying-Jun Zhang 고려인삼학회 2020 Journal of Ginseng Research Vol.44 No.3
Background: Root rot is a serious destructive disease of Panax notoginseng, a famous cultivated araliaceousherb called Sanqi or Tianqi in Southwest China. Methods: The chemical substances of Sanqi rot roots were explored by chromatographic techniques. MS,1D/2D-NMR, and single crystal X-ray diffraction were applied to determine the structures. Murinemacrophage RAW264.7 and five human cancer cell lines were used separately for evaluating the antiinflammatoryand cytotoxic activities. Results and Conclusion: Thirty dammarane-type triterpenes and saponins were isolated from the rot rootsof P. notoginseng. Among them, seven triterpenes, namely, 20(S)-dammar-25-ene-24(S)-hydroperoxyl-3b,6a,12b,20-tetrol (1), 20(S)-dammar-3-oxo-23-ene-25-hydroperoxyl-6a,12b,20-triol (2), 20(S)-dammar-12-oxo-23-ene-25-hydroperoxyl-3b,6a,20-triol (3), 20(S)-dammar-3-oxo-23-ene-25-hydroperoxyl-12b,20-diol (4), 20(S),24(R)-epoxy-3,4-seco-dammar-25-hydroxy-12-one-3-oic acid (5), 20(S),24(R)-epoxy-3,4-seco-dammar-25-hydroxy-12-one-3-oic acid methyl ester (6), and 6a-hydroxy-22,23,24,25,26,27-hexanordammar-3,12,20-trione (7), are new compounds. In addition, 12 known ones (12e16 and 19e25)were reported in Sanqi for the first time. The new Compound 1 showed comparable antiinflammatoryactivity on inhibition of NO production to the positive control, whereas the known compounds 9, 12, 13,and 16 displayed moderate cytotoxicities against five human cancer cell lines. The results will providescientific basis for understanding the chemical constituents of Sanqi rot roots and new candidates forsearching antiinflammatory and antitumor agents.
Jia Zheng,Chong-De Wu,Jun Huang,Rong-Qing Zhou,Xue Pin Liao 한국식품과학회 2013 Food Science and Biotechnology Vol.22 No.3
The volatile compounds in Chinese soy sauce moromi cultured by different fermentation processes [lowsalt solid-state fermentation (LSSF), high-salt dilute-state fermentation (HSDF), and high-salt constant temperature fermentation (HSCT)] were determined by GC-MS. The LSSF moromi had the highest total concentration of volatile compounds, followed by HSCT and HSDF moromi. Volatiles such as ethyl linoleate and ethyl oleate dominated in HSCT moromi. 2,3-Butanediol and 2,6-dimethylpyrazine were present at high content in LSSF moromi. The hierarchal cluster analysis (HCA) and principal component analysis (PCA) were employed to investigate the fermentation process effect on the category of samples. Based on HCA,HSCT (a1 and a2) and HSDF (b1 and b2) clustered in 1group, and LSSF (c1 and c2) located in another group. PCA illustrated that each kind of samples correlating with specific volatile compound groups were clearly differentiated according to their fermentation processes. The results suggest that GC-MS together with multivariate analyses could provide practical reference to recognize different Chinese soy sauces moromi.
Stabilization of Polymer-Hydrogel Capsules via Thiol–Disulfide Exchange
Chong, Siow-Feng,Chandrawati, Rona,Stä,dler, Brigitte,Park, Jeongju,Cho, Jinhan,Wang, Yajun,Jia, Zhongfan,Bulmus, Volga,Davis, Thomas P.,Zelikin, Alexander N.,Caruso, Frank WILEY-VCH Verlag 2009 Small Vol.5 No.22
<P>Polymer hydrogels are used in diverse biomedical applications including drug delivery and tissue engineering. Among different chemical linkages, the natural and reversible thiol–disulfide interconversion is extensively explored to stabilize hydrogels. The creation of macro-, micro-, and nanoscale disulfide-stabilized hydrogels commonly relies on the use of oxidizing agents that may have a detrimental effect on encapsulated cargo. Herein an oxidization-free approach to create disulfide-stabilized polymer hydrogels via a thiol–disulfide exchange reaction is reported. In particular, thiolated poly(methacrylic acid) is used and the conditions of polymer crosslinking in solution and on colloidal porous and solid microparticles are established. In the latter case, removal of the core particles yields stable, hollow, disulfide-crosslinked hydrogel capsules. Further, a procedure is developed to achieve efficient disulfide crosslinking of multilayered polymer films to obtain stable, liposome-loaded polymer-hydrogel capsules that contain functional enzymatic cargo within the liposomal subcompartments. This approach is envisaged to facilitate the development of biomedical applications of hydrogels, specifically those including fragile cargo.</P> <B>Graphic Abstract</B> <P>Polymer-hydrogel capsules are stabilized via disulfide linkages whereby crosslinking relies on the thiol–disulfide exchange without the use of oxidizing agents (see image). The method permits the formation of hollow capsules as well as functional capsosomes, hydrogel capsules subcompartmentalized with enzyme-loaded liposomes, without the loss of activity of liposome-encapsulated enzymes. <img src='wiley_img/16136810-2009-5-22-SMLL200900906-content.gif' alt='wiley_img/16136810-2009-5-22-SMLL200900906-content'> </P>
Chaojie Chong,Yaqi Wu,Zhewen Dong,Zixian Wang,Shumei Zhong,Haokun Chen,Qi Qi Pang,Jia-Le Song,Yanyuan Zhou 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
This study was to investigate the ameliorative effect of GFPS on clinical symptoms in letrozole(1 mg/kg)-induced PCOS rats. The female SD rats were classified into 4 groups as follows: the normal group (gavaged with saline), the PCOS group(ingested letrozole daily for 21 days). Normal group and metformin group gavaged with letrozole followed by metformin (265 mg/kg) and GFPS(600 mg/kg), respectively. All rats were weighed every 3 days until the end of the experiment. The ovaries, perirenal, abdomen and periuterine fat were removed and the relative weights (g/bw×100) were calculated. Serum levels of FSH, LH, E2, T, TG, TC, LDL-C were measured by ELISA and calculated the LH/FSH ratio. GFPS reduced follicle number and increases granulosa cell layer thickness and luteal number. GFPS also reduced the increase of body weight, ovarian and visceral fat weight in PCOS rats (P<0.01). In addition, GFPS reduced the serum levels of T, LH/FSH, TC, TG, LDL-C and LH, and elevated the serum levels of E2 and FSH in PCOS rats. In conclusion, GFPS can improve follicular development and restore body weight, ovarian weight, serum hormone levels and lipid profile in PCOS rats.
Face Detection and Extraction Based on Combined Difference and Ellipse Clustering Method
시가(Jia Shi),우종호(Chong Ho Woo) 한국정보과학회 2009 한국정보과학회 학술발표논문집 Vol.36 No.2C
본 논문에서는 차분 방법과 타원 군집 방법의 결합한 방법을 통해서 얼굴을 검출하고 추출하는 방법을 제안하였다. YCbCr공간에서 차분방법을 이용해서 얼굴 구역을 검출한 후에 타원군집방법을 사용하여 얼굴의 피부색정보를 추출한다. 실행결과 실제 복잡한 배경에서 얼굴을 검출할 뿐만 아니라 얼굴의 피부색정보를 구한다. 이 방법을 사용하면 광도의 영향을 적게 받고, 데이트의 저장공간을 절약할 수 있다. 이 방법은 실시간 얼굴검출시스템과 피부색 기반의 얼굴인식시스템에 활용할 수 있다. In this paper a method combined the difference method and ellipse clustering method is proposed for efficient face detection and complete extraction. This gets a general facial region by processing the image of face in YCbCr space using the difference method and obtains the whole face color information through the Ellipse clustering method. The experimental results show that we can get the location of the face and the face color information, and extract the face from a complex original image in reality. It is less sensitive to lighting and requires less storage space for the data. This method is applicable to real-time face detection system and face recognition system based on skin color.
Shang, Jia-Huan,Sun, Wen-Jie,Zhu, Hong-Tao,Wang, Dong,Yang, Chong-Ren,Zhang, Ying-Jun The Korean Society of Ginseng 2020 Journal of Ginseng Research Vol.44 No.3
Background: Root rot is a serious destructive disease of Panax notoginseng, a famous cultivated araliaceous herb called Sanqi or Tianqi in Southwest China. Methods: The chemical substances of Sanqi rot roots were explored by chromatographic techniques. MS, 1D/2D-NMR, and single crystal X-ray diffraction were applied to determine the structures. Murine macrophage RAW264.7 and five human cancer cell lines were used separately for evaluating the antiinflammatory and cytotoxic activities. Results and Conclusion: Thirty dammarane-type triterpenes and saponins were isolated from the rot roots of P. notoginseng. Among them, seven triterpenes, namely, 20(S)-dammar-25-ene-24(S)-hydroperoxyl-3β,6α,12β,20-tetrol (1), 20(S)-dammar-3-oxo-23-ene-25-hydroperoxyl-6α,12β,20-triol (2), 20(S)-dammar-12-oxo-23-ene-25-hydroperoxyl-3β,6α,20-triol (3), 20(S)-dammar-3-oxo-23-ene-25-hydroperoxyl-12β,20-diol (4), 20(S),24(R)-epoxy-3,4-seco-dammar-25-hydroxy-12-one-3-oic acid (5), 20(S),24(R)-epoxy-3,4-seco-dammar-25-hydroxy-12-one-3-oic acid methyl ester (6), and 6α-hydroxy-22,23,24,25,26,27-hexanordammar-3,12,20-trione (7), are new compounds. In addition, 12 known ones (12-16 and 19-25) were reported in Sanqi for the first time. The new Compound 1 showed comparable antiinflammatory activity on inhibition of NO production to the positive control, whereas the known compounds 9, 12, 13, and 16 displayed moderate cytotoxicities against five human cancer cell lines. The results will provide scientific basis for understanding the chemical constituents of Sanqi rot roots and new candidates for searching antiinflammatory and antitumor agents.