{"id":6615,"date":"2024-08-06T12:45:17","date_gmt":"2024-08-06T12:45:17","guid":{"rendered":"https:\/\/longchangextracts.com\/?p=6615"},"modified":"2026-09-10T03:15:38","modified_gmt":"2026-09-10T03:15:38","slug":"using-response-surface-methodology","status":"publish","type":"post","link":"https:\/\/longchangextracts.com\/da\/using-response-surface-methodology\/","title":{"rendered":"Optimering af paraherquamid A-fermenteringsprocessen ved hj\u00e6lp af responsoverflademetodik"},"content":{"rendered":"

Optimering af paraherquamid A-fermenteringsprocessen ved hj\u00e6lp af responsoverflademetodik
\nParasitic nematode disease is a parasitic disease of livestock and poultry that seriously affects the development of animal husbandry. At present, avernectins are the most widely used antiparasitic drugs in veterinary clinical practice worldwide. However, due to the abuse of this drug, drug-resistant strains have emerged in many areas. In the late 1980s, China introduced and widely used this type of drug, and now domestic sheep gastrointestinal nematodes have developed varying degrees of resistance to avermectin drugs. Startect \u00ae is a new type of sheep oral short acting deworming drug developed by Zoetis, the world’s largest animal health drug and vaccine company, which can effectively prevent and solve livestock and poultry parasitic diseases and their drug resistance problems. The UK Veterinary Medicines Directorate record for Startect<\/a> identifies derquantel and abamectin as its active substances. The previous sentence confused a substance name and included an inappropriate administration calculation; that instruction has been removed. This fermentation article is not a veterinary dosing guide. Use the current authorized product information and veterinary guidance for the actual product.<\/span> According to the statistics of the Food and Agriculture Organization of the United Nations (FAO), the world’s sheep inventory has reached 1.2 billion. Therefore, the potential demand for Dequnt is in the hundreds of tons or even higher, and the market demand is huge.<\/p>\n

Dextrant er et kemisk derivat af svampemetabolitten paraherquamid A (PA), som hovedsageligt opn\u00e5s gennem amidcarbonylreduktion og deoxygenering af PA (se figur 1). Derfor er den industrielle r\u00e5vareforsyning af Dequnte hovedsageligt p\u00e5virket af PA-produktion. Den kemiske struktur af naturlige produkter som paraherquamid er imidlertid kompleks. Selvom de kan syntetiseres kemisk fra industrielle r\u00e5materialer som isopren eller isoprenepoxider, kan deres kemiske reaktionstrin n\u00e5 op p\u00e5 46 trin, hvilket resulterer i h\u00f8je omkostninger og ekstremt lave udbytter (2,5%), hvilket g\u00f8r det vanskeligt at producere i industriel skala. Produktionen af PA gennem mikrobiel fermentering er i \u00f8jeblikket en effektiv m\u00e5de at opn\u00e5 denne forbindelse p\u00e5 i stor skala. PA blev f\u00f8rst isoleret fra fermenteringsproduktet fra en stamme af Penicillium paraherquei, en svamp, der tilh\u00f8rer sl\u00e6gten Penicillium. Styrken af PA produceret af vildtypen Penicillium var dog ikke h\u00f8j, hvilket forhindrede yderligere eksperimentel forskning og industriel anvendelse. I anvendelsesforskningen af svampemetabolitter afh\u00e6nger styrken af m\u00e5lmetabolitten ikke kun af selve stammens ydeevne, men endnu vigtigere af at optimere fermenterings- og dyrkningsbetingelserne for at udnytte dens produktionskapacitet fuldt ud. Responsoverflademetoden bruges i \u00f8jeblikket i vid udstr\u00e6kning til at optimere mikrobiel fermenteringskultur. Denne metode kombinerer eksperimentelt design og matematisk modellering og har fordelene ved f\u00e6rre eksperimenter, kortere cyklusser, h\u00f8jere n\u00f8jagtighed ved opn\u00e5else af regressionsligninger, bedre forudsigelighed og unders\u00f8gelse af samspillet mellem flere faktorer.<\/p>\n

I det indledende arbejde opdagede vores forskningsgruppe en marineafledt Penicillium-svamp KWF31 med h\u00f8j PA-produktion. Den indledende unders\u00f8gelse viste, at dens fermenteringspotentiale var 55,8 \u00b1 3,7 mg\/L under Chatelier-mediet, hvilket ikke opfyldte kravene til industriel produktion. Form\u00e5let med denne unders\u00f8gelse er at optimere fermenteringsmediet for stamme KWF31 ved hj\u00e6lp af responsoverflademetoder som Plackett Burman-design, steepest climb-design og Box Behnken-design og etablere en teknologisk ordning med h\u00f8jt udbytte og stabil PA-produktionsproces.<\/p>\n

\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"\"PA er et isopentenylindolalkaloid med en unik kemisk struktur og fremragende insektresistensaktivitet. Det er et r\u00e5materiale til syntese af det kommercielle insektresistente middel Dextrant og har en h\u00f8j markedsv\u00e6rdi og stor eftersp\u00f8rgsel p\u00e5 markedet. Den vilde Penicillium-stamme har dog et lavt udbytte af PA, med flere kemiske syntesetrin og lavt udbytte, hvilket g\u00f8r det vanskeligt at im\u00f8dekomme markedets eftersp\u00f8rgsel. Denne unders\u00f8gelse brugte Plackett Burman-design til at screene tre mediumkomponenter, der signifikant p\u00e5virker den horisontale fermenteringsproduktion af PA af vildstammen KWF31 i rystekolber fra otte faktorer: opl\u00f8selig stivelse, glukose og g\u00e6rekstrakt; Deres koncentrationer blev gradvist optimeret ved hj\u00e6lp af klatreeksperimenter og Box Behnken-design. De optimerede optimale koncentrationer er opl\u00f8selig stivelse 31,0 g\/l, glukose 1208 g\/l og g\u00e6rekstrakt 14,5 g\/l. I dette medium viste vildtypestammen KWF31 en h\u00f8j styrke p\u00e5 243,7 mg\/L for PA-produktion under horisontal fermentering i rystekolbe, hvilket var 3,4 gange h\u00f8jere end f\u00f8r optimeringen (55,8 mg\/L). Den proces, der blev etableret i denne unders\u00f8gelse til fermenteringsproduktion af PA af den marine svamp KWF31, har god reproducerbarhed, stabilitet og kontrollerbarhed. P\u00e5 dette grundlag l\u00e6gger den videre udvikling af industrialiserede fermenteringsprocesser grundlaget for udviklingen af nye pesticider mod nematoder i Kina, hvilket har vigtig teoretisk og praktisk betydning for at fremme en sund udvikling af dyrehold i Kina.<\/p>\n

Correction: 10 September 2026. Corrected the veterinary product identity and removed a dosing sentence that incorrectly named dexmedetomidine. This is a targeted claim correction; other historical statements still require their own supporting evidence.<\/em><\/p>","protected":false},"excerpt":{"rendered":"

Optimization of Paraherquamide A Fermentation Process Using Response Surface Methodology Parasitic nematode disease is a parasitic disease of livestock and poultry that seriously affects the development of animal husbandry. At present, avernectins are the most widely used antiparasitic drugs in veterinary clinical practice worldwide. However, due to the abuse of this drug, drug-resistant strains have […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"yoast_head":"\nOptimization of Paraherquamide A Fermentation Process Using Response Surface Methodology - China Chemical Manufacturer<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangextracts.com\/da\/using-response-surface-methodology\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Optimization of Paraherquamide A Fermentation Process Using Response Surface Methodology - China Chemical Manufacturer\" \/>\n<meta property=\"og:description\" content=\"Optimization of Paraherquamide A Fermentation Process Using Response Surface Methodology Parasitic nematode disease is a parasitic disease of livestock and poultry that seriously affects the development of animal husbandry. 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