?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=IMOBILISASI+ENZIM+%CE%B1-AMILASE+DARI+Aspergillus+sp.%0D%0A%0D%0AMENGGUNAKAN+KITOSAN&rft.creator=AVI+%2C+ERIYANI&rft.subject=500+ilmu+pengetahuan+alam+dan+matematika&rft.subject=540+Kimia+dan+ilmu+yang+berhubungan&rft.description=Kestabilan+enzim+terhadap+pH+dan+suhu+adalah+faktor+yang+sangat+penting%0D%0Adalam+dunia+industri.+Enzim+tidak+dapat+berkerja+secara+optimum+pada+suhu+tinggi%0D%0Adan+pH+ekstrem+sehingga+perlu+dilakukan+peningkatan+kestabilan+enzim+untuk%0D%0Amengatasi+masalah+tersebut.%0D%0APenelitian+ini+bertujuan+untuk+mendapatkan+enzim+%CE%B1-amilase+dari+Aspergillus%0D%0Asp.+dengan+aktivitas+dan+tingkat+kemurnian+yang+tinggi+dibandingkan+dengan%0D%0Aekstrak+kasar+enzim.+Mendapatkan+enzim+%CE%B1-amilase+hasil+imobilisasi+dengan%0D%0Amatriks+kitosan+dari+Aspergillus+sp.+yang+meningkat+kestabilannya+dibandingkan%0D%0Adengan+enzim+hasil+pemurnian.+Prosedur+penelitian+ini+dilakukan+melalui+tahap%0D%0Aberikut%3A+produksi%2C+isolasi%2C+pemurnian%2C+dan+imobilisasi.+Karakterisasi+enzim+hasil%0D%0Apemurnian+dan+enzim+hasil+imobilisasi.%0D%0AHasil+penelitian+ini+menunjukkan+bahwa+enzim+%CE%B1-amilase+hasil+pemurnian%0D%0Amemiliki+tingkat+kemurnian+sebesar+11%2C39+kali+lebih+tinggi+dibandingkan+dengan%0D%0Aekstrak+kasar+enzim.+Uji+stabilitas+termal+pada+suhu+60oC+selama+80+menit+enzim%0D%0Ahasil+pemurnian+menunjukkan+aktivitas+sisa+sebesar+3%2C67%25+dan+waktu+paruh+17%2C54%0D%0Amenit.+Sementara+itu%2C+enzim+hasil+imobilisasi+dengan+matriks+kitosan+menunjukkan%0D%0Aaktivitas+sisa+sebesar+18%2C93%25+dengan+waktu+paruh+33%2C16+menit%2C+dalam+kondisi+yang%0D%0Asama.+Kestabilan+enzim+hasil+imobilisasi+mengalami+peningkatan+sebesar+1%2C88+kali%0D%0Adibandingkan+dengan+enzim+hasil+pemurnian.+Aktivitas+sisa+enzim+hasil+imobilisasi%0D%0Adengan+matriks+kitosan+setelah+pemakaian+berulang+sebanyak+enam+kali%0D%0Amenunjukkan+nilai+sebesar+19%2C85%25.%0D%0A%0D%0AKata+kunci%3A+imobilisasi%2C+%CE%B1-amilase%2C+Aspergillus+sp.%2C+kitosan%0D%0A%0D%0A%0D%0AThe+stability+of+enzymes+against+pH+and+temperature+is+a+very+important%0D%0Afactor+in+the+industrial+world.+Enzymes+cannot+function+optimally+at+high%0D%0Atemperatures+and+extreme+pH+levels%2C+so+it+is+necessary+to+enhance+enzyme+stability%0D%0Ato+address+this+issue.%0D%0AThis+research+aims+to+obtain+the+%CE%B1-amylase+enzyme+from+Aspergillus+sp.%0D%0Awith+higher+activity+and+purity+levels+compared+to+crude+enzyme+extracts.+It+also%0D%0Aseeks+to+obtain+the+immobilized+%CE%B1-amylase+enzyme+using+a+chitosan+matrix+from%0D%0AAspergillus+sp.%2C+which+has+enhanced+stability+compared+to+the+purified+enzyme.+The%0D%0Aresearch+procedure+was+conducted+through+the+following+stages%3A+production%2C%0D%0Aisolation%2C+purification%2C+and+immobilization.+The+enzymes+were+then+characterized%0D%0Aafter+purification+and+immobilization.%0D%0AThe+results+of+this+study+indicate+that+the+purified+%CE%B1-amylase+enzyme+has+a%0D%0Apurity+level+11.39+times+higher+than+the+crude+enzyme+extract.+The+thermal+stability%0D%0Atest+at+60%C2%B0C+for+80+minutes+showed+that+the+purified+enzyme+had+a+residual+activity%0D%0Aof+3.67%25+and+a+half-life+of+17.54+minutes.+Meanwhile%2C+the+immobilized+enzyme%0D%0Awith+chitosan+matrices+showed+a+residual+activity+of+18.93%25+and+a+half-life+of+33.16%0D%0Aminutes+under+the+same+conditions.+The+stability+of+the+immobilized+enzyme%0D%0Aincreased+by+1.88+times+compared+to+the+purified+enzyme.+The+residual+activity+of%0D%0Athe+immobilized+enzyme+with+chitosan+matrices+after+six+repeated+uses+was+19.85%25%0D%0A%0D%0AKeywords%3A+immobilization%2C+%CE%B1-amylase%2C+Aspergillus+sp.%2C+chitosan%0D%0A&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2024-08-20&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82460%2F1%2FAVI%2520ERIYANI%2520-%2520Abstrak%2520-%2520Avi%2520Eriyani.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82460%2F2%2FAVI%2520ERIYANI%2520-%2520SKRIPSI%2520-%2520Avi%2520Eriyani.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F82460%2F3%2FAVI%2520ERIYANI%2520-%2520SKRIPSI%2520TANPA%2520PEMBAHASAN%2520-%2520Avi%2520Eriyani.pdf&rft.identifier=++AVI+%2C+ERIYANI++(2024)+IMOBILISASI+ENZIM+%CE%B1-AMILASE+DARI+Aspergillus+sp.+MENGGUNAKAN+KITOSAN.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F82460%2F