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首页> 外文期刊>Bioprocess and Biosystems Engineering >Latex peptidases of Calotropis procera for dehairing of leather as an alternative to environmentally toxic sodium sulfide treatment
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Latex peptidases of Calotropis procera for dehairing of leather as an alternative to environmentally toxic sodium sulfide treatment

机译：Calotropis procera的乳胶肽酶用于皮革脱毛，以替代对环境有毒的硫化钠处理

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摘要

Dehairing of crude leather is a critical stage performed at the beginning of its processing to obtain industrially useful pieces. Tanneries traditionally apply a chemical process based on sodium sulfide. Since this chemical reactive is environmentally toxic and inefficiently recycled, innovative protocols for reducing or eliminating its use in leather depilation are welcomed. Therefore, latex peptidases from Calotropis procera (CpLP) and Cryptostegia grandiflora (CgLP) were assayed for this purpose. Enzyme activity on substrates representative of skin such as hide powder azure (U-HPA), elastin (U-E), azocollagen (U-AZOCOL), keratin (U-K), and epidermis (U-EP) was determined, while depilation activity was assayed on cow hide. Only CpLP was active against keratin (13.4 U-K) and only CgLP was active against elastin (0.12 U-E). CpLP (93.0 U-HPA, 403.6 U-AZOCOL, 36.3 U-EP) showed higher activity against the other substrates than CgLP (47.6 U-HPA, 261.5 U-AZOCOL, 8.5 U-EP). In pilot assays, CpLP (0.05% w/v with sodium sulfite 0.6% w/v as activator) released hairs from cow hide pieces. Macroscopic and microscopic analyses of the hide revealed that the dehairing process was complete and the leather structure was preserved. The proteolytic system of C. procera is a suitable bioresources to be exploited by tanneries.
机译：粗皮革的脱毛是在其加工开始以获得工业上有用的碎片的关键阶段。制革厂传统上采用基于硫化钠的化学工艺。由于这种化学反应物对环境有毒且回收利用效率低，因此欢迎采用减少或消除其在皮革脱毛中使用的创新方案。因此，为此目的测定了来自东方花菱草（Calptropis procera）（CpLP）和大隐隐球菌（Cryptostegia grandiflora）（CgLP）的乳胶肽酶。确定了代表皮肤的底物上的酶活性，例如生皮粉天青（U-HPA），弹性蛋白（UE），偶氮胶原（U-AZOCOL），角蛋白（UK）和表皮（U-EP），同时测定了脱毛活性在母牛皮上。只有CpLP对角蛋白有活性（13.4 U-K），只有CgLP对弹性蛋白有活性（0.12 U-E）。 CpLP（93.0 U-HPA，403.6 U-AZOCOL，36.3 U-EP）对其他底物的活性高于CgLP（47.6 U-HPA，261.5 U-AZOCOL，8.5 U-EP）。在初步试验中，CpLP（0.05％w / v，以0.6％w / v的亚硫酸钠为活化剂）从牛皮革碎片中释放出毛发。皮革的宏观和微观分析表明，脱毛过程已完成，皮革结构得以保留。 proc。procera的蛋白水解系统是制革厂可以利用的合适生物资源。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2017年第9期|1391-1398|共8页
  • 作者

    Lopez Laura M. I.; Viana Carolina A.; Errasti Maria E.; Garro Maria L.; Martegani Jose E.; Mazzilli German A.; Freitas Cleverson D. T.; Araujo Idila M. S.; da Silva Rafaela O.; Ramos Marcio V.;

  • 作者单位

    Comis Invest Cient Prov Buenos Aires, Ctr Invest & Tecnol Cuero, Buenos Aires, DF, Argentina|Comis Invest Cient Prov Buenos Aires, INTI Cueros, Buenos Aires, DF, Argentina;

    Univ Fed Ceara, Dept Bioquim & Biol Mol, Fortaleza, Ceara, Brazil;

    Comis Invest Cient Prov Buenos Aires, Ctr Invest & Tecnol Cuero, Buenos Aires, DF, Argentina|Comis Invest Cient Prov Buenos Aires, INTI Cueros, Buenos Aires, DF, Argentina;

    Comis Invest Cient Prov Buenos Aires, Ctr Invest & Tecnol Cuero, Buenos Aires, DF, Argentina|Comis Invest Cient Prov Buenos Aires, INTI Cueros, Buenos Aires, DF, Argentina;

    Comis Invest Cient Prov Buenos Aires, Ctr Invest & Tecnol Cuero, Buenos Aires, DF, Argentina|Comis Invest Cient Prov Buenos Aires, INTI Cueros, Buenos Aires, DF, Argentina;

    Comis Invest Cient Prov Buenos Aires, Ctr Invest & Tecnol Cuero, Buenos Aires, DF, Argentina|Comis Invest Cient Prov Buenos Aires, INTI Cueros, Buenos Aires, DF, Argentina;

    Univ Fed Ceara, Dept Bioquim & Biol Mol, Fortaleza, Ceara, Brazil;

    EMBRAPA Agrotrop, Fortaleza, Ceara, Brazil;

    Univ Fed Ceara, Dept Bioquim & Biol Mol, Fortaleza, Ceara, Brazil;

    Univ Fed Ceara, Dept Bioquim & Biol Mol, Fortaleza, Ceara, Brazil;

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  • 正文语种 eng
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  • 关键词

    Cysteine peptidases; Cleaner production; Latex peptidases; Plant enzymes;

    机译：半胱氨酸肽酶;清洁生产;乳胶肽酶;植物酶;

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