Home

Citation: LI Duan-Hua, ZHOU Xiao-Hua. Decolorization of Chitin from Silkworm Chrysalis[J]. Chinese Journal of Applied Chemistry, ;2004, 21(3): 309-312. shu

Decolorization of Chitin from Silkworm Chrysalis

LI Duan-Hua ^, ,
ZHOU Xiao-Hua

1.
College of Chemistry and Chemical Engineering Chongqing University, Chongqing 400044

Corresponding author: LI Duan-Hua,
Received Date: 30 April 2003
Available Online: 22 October 2003

The colored chitin has been isolated from silkworm chrysalis with protein being extracted off with NaOH solution. The decolorization of the colored silkworm chrysalis chitin was performed by aq. H₂O₂ solution treatment. The conditions for taking off protein are as follows:m(5%NaOH):m(silkworm chrysalis residue)=80:30, 70℃ and 2 h. The calcium containg salts can be taken off completely with 3%HCl in conditions of 2 h, 25℃ and m(3%HCl):m(silkworm chrysalis residue)=8:3. The colored crude chitin without protein and salts can be decolored by H₂O₂ treatment in conditions of 65~70℃, pH 8.5±0.5, 5 h and m(30%H₂O₂):m(silkworm chrysalis residue)=130:50. The yield of white chitin is 25% with whiteness above 30%. It suggested that H₂O₂ oxidizes the sulfur of cysteine present in the system of iron-sulfur center and and the cytochromes and changes it into sulfoxides, causing the chemical bond between the chromoprotein and the chitin to be broken and chromoprotein to be separated.
- chitin,
- silkworm chrysalis,
- H₂O₂,
- decolorization
1. [1]
  Dong-Bing Cheng , Junxin Duan , Haiyu Gao . Experimental Teaching Design on Chitosan Extraction and Preparation of Antibacterial Gel. University Chemistry, 2024, 39(2): 330-339. doi: 10.3866/PKU.DXHX202308053
2. [2]
  Yixuan Zhu , Qingtong Wang , Jin Li , Lin Chen , Junlong Zhao . Blog of Oxytocin. University Chemistry, 2024, 39(9): 134-140. doi: 10.12461/PKU.DXHX202310090
3. [3]
  Yukun Xing , Xiaoyu Xie , Fangfang Chen . A Sunlit Gift: Vitamin D. University Chemistry, 2024, 39(9): 28-34. doi: 10.12461/PKU.DXHX202402006
4. [4]
  Jijun Sun , Qianlang Wang , Qian Chen , Quanqin Zhao , Shumei Zhai . The Antibiotic Legion’s Manifesto to Human Allies. University Chemistry, 2025, 40(4): 307-321. doi: 10.12461/PKU.DXHX202405206
5. [5]
  Yaling Chen . Basic Theory and Competitive Exam Analysis of Dynamic Isotope Effect. University Chemistry, 2024, 39(8): 403-410. doi: 10.3866/PKU.DXHX202311093
6. [6]
  Xiaoning TANG , Junnan LIU , Xingfu YANG , Jie LEI , Qiuyang LUO , Shu XIA , An XUE . Effect of sodium alginate-sodium carboxymethylcellulose gel layer on the stability of Zn anodes. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1452-1460. doi: 10.11862/CJIC.20240191
7. [7]
  Zhenhua Wang , Haoyang Feng , Xiaoyang Shao , Wenru Fan . Vitamins in Solid Propellants: Controlled Synthesis of Neutral Macromolecular Bonding Agents. University Chemistry, 2025, 40(4): 1-9. doi: 10.3866/PKU.DXHX202401007
8. [8]
  Jianjun LI , Mingjie REN , Lili ZHANG , Lingling ZENG , Huiling WANG , Xiangwu MENG . UV-assisted degradation of tetracycline hydrochloride by MnFe₂O₄@activated carbon activated persulfate. Chinese Journal of Inorganic Chemistry, 2024, 40(10): 1869-1880. doi: 10.11862/CJIC.20240187
9. [9]
  Shijie Li , Ke Rong , Xiaoqin Wang , Chuqi Shen , Fang Yang , Qinghong Zhang . Design of Carbon Quantum Dots/CdS/Ta₃N₅ S-Scheme Heterojunction Nanofibers for Efficient Photocatalytic Antibiotic Removal. Acta Physico-Chimica Sinica, 2024, 40(12): 2403005-. doi: 10.3866/PKU.WHXB202403005
10. [10]
  Wanqun Hu , Pingping Zhu , Yuan Zheng , Wanqun Zhang , Wei Shao , Hong Wu , Qiang Zhou , Kaiping Yang , Xiang Sheng . Design and Practice of Ideological and Political Case Study in Instrumental Analysis Experiment Course: the Extraction and Structural Identification of Artemisinin. University Chemistry, 2024, 39(2): 203-207. doi: 10.3866/PKU.DXHX202310062
11. [11]
  Shui Hu , Houjin Li , Zhenming Zang , Lianyun Li , Rong Lai . Integration of Science and Education Promotes the Construction of Undergraduate-to-Master’s Integration Experimental Courses: A Case Study on the Extraction, Separation and Identification of Artemisinin from Artemisia annua. University Chemistry, 2024, 39(4): 314-321. doi: 10.3866/PKU.DXHX202310063
12. [12]
  Junjie Zhang , Yue Wang , Qiuhan Wu , Ruquan Shen , Han Liu , Xinhua Duan . Preparation and Selective Separation of Lightweight Magnetic Molecularly Imprinted Polymers for Trace Tetracycline Detection in Milk. University Chemistry, 2024, 39(5): 251-257. doi: 10.3866/PKU.DXHX202311084
13. [13]
  Liwei Wang , Guangran Ma , Li Wang , Fugang Xu . A Comprehensive Analytical Chemistry Experiment: Colorimetric Detection of Vitamin C Using Nanozyme and Smartphone. University Chemistry, 2024, 39(8): 255-262. doi: 10.3866/PKU.DXHX202312094
14. [14]
  Jinwang Wu , Qijing Xie , Chengliang Zhang , Haifeng Shi . 自旋极化增强ZnFe_1.2Co_0.8O₄/BiVO₄ S型异质结光催化性能降解四环素. Acta Physico-Chimica Sinica, 2025, 41(5): 100050-. doi: 10.1016/j.actphy.2025.100050
15. [15]
  Zongyuan Chen , ChunSheng Shi , Yiwen Li , Ganlin Zu , Qiang Jin , Haishan Wang , Fujun Wang , Dekun Yan , Zhijun Guo , Wangsuo Wu . Measurement of Uranium Isotopes in Environmental Water Samples by Alpha-Spectroscopy: Design of an Undergraduate Radiochemistry Experiment. University Chemistry, 2025, 40(4): 353-358. doi: 10.12461/PKU.DXHX202406103
16. [16]
  Kexin Dong , Chuqi Shen , Ruyu Yan , Yanping Liu , Chunqiang Zhuang , Shijie Li . Integration of Plasmonic Effect and S-Scheme Heterojunction into Ag/Ag₃PO₄/C₃N₅ Photocatalyst for Boosted Photocatalytic Levofloxacin Degradation. Acta Physico-Chimica Sinica, 2024, 40(10): 2310013-. doi: 10.3866/PKU.WHXB202310013
17. [17]
  Rong Tian , Yadi Yang , Naihao Lu . Comprehensive Experimental Design of Undergraduate Students Based on Interdisciplinarity: Study on the Effect of Quercetin on Chlorination Activity of Myeloperoxidase. University Chemistry, 2024, 39(8): 247-254. doi: 10.3866/PKU.DXHX202312064

Get Citation

PDF

XML

Metrics

PDF Downloads(1)
Abstract views(534)
HTML views(76)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return