?url_ver=Z39.88-2004&rft_id=1657011006&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=OPTIMASI+PRODUKSI%2C+KARAKTERISASI%2C+DAN+UJI+INHIBISI+KOROSI%0D%0ABIOSURFAKTAN+DARI+BAKTERI+Bacillus+oceanisediminis+PKT+B3&rft.creator=PUTRI+%2C+KUSWEDARI&rft.subject=500+ilmu+pengetahuan+alam+dan+matematika&rft.subject=540+Kimia+dan+ilmu+yang+berhubungan&rft.description=Biosurfaktan+merupakan+senyawa+aktif+permukaan+yang+disintesis+oleh+mikroba%0D%0Adengan+menggunakan+berbagai+sumber+karbon+dan+sumber+nitrogen.+Biosurfaktan%0D%0Amenjadi+salah+satu+surfaktan+alam+yang+banyak+digunakan+dalam+berbagai%0D%0Aindustri.+Penelitian+ini+bertujuan+untuk+mendapatkan+kondisi+sumber+nitrogen%0D%0Aterbaik+dalam+memproduksi+biosurfaktan+dari+bakteri+Bacillus+oceanisediminis%0D%0APKT+B3+yang+berasal+dari+proses+pengomposan+limbah+domestik+serta+menguji%0D%0Apotensinya+sebagai+inhibitor+korosi.+Metode+yang+dilakukan+meliputi+optimasi%0D%0Asumber+nitrogen%2C+produksi+biosurkatan%2C+uji+biosurfaktan%2C+karakterisasi+biosurfaktan%0D%0Adengan+menggunakan+FT-IR%2C+serta+uji+potensi+biosurfaktan+sebagai+inhibitor%0D%0Akorosi.+Kondisi+optimum+sumber+nitrogen+untuk+produksi+biosurfaktan+diperoleh%0D%0Adengan+menggunakan+NH4Cl+0%2C5%25.+Biosurfaktan+dari+bakteri+Bacillus%0D%0Aoceanisediminis+PKT+B3+memiliki+ciri-ciri+fisik+biosurfaktan+berwarna+putih%0D%0Akekuningan+sebanyak+0%2C5990+g+dengan+nilai+indeks+emulsi+sebesar+70%25.+Hasil%0D%0Aanalisa+data+FT-IR+memperlihatkan+adanya+serapan+dari+gugus+fungsi+pada+daerah%0D%0A3273+cm-1+(N-H+stretching)%2C+1531+cm-1+(Deformasi+N-H+dan+C-N+stretching)%2C%0D%0A1629+cm-1+(CO-N+stretching)%2C+1629-1396+cm-1+(C-H+(rantai+alifatik))%2C+dan+1236-%0D%0A1055+cm-1+(C-N+stretching+(ikatan+peptida))+yang+merupakan+ciri-ciri+khas+serapan%0D%0Auntuk+jenis+lipopeptida.+Uji+inhibisi+korosi+menunjukkan+bahwa+penambahan%0D%0Ainhibitor+dapat+menurunkan+laju+korosi+dengan+nilai+persen+proteksi+sebesar%0D%0A92%2C24%25+dalam+NaCl+3%25+dan+53%2C57%25+dalam+NaCl+3%25+jenuh+CO2+pada+konsentrasi%0D%0Abiosurfaktan+150+ppm.+Berdasarkan+hasil+penelitian+ini%2C+dapat+disimpulkan+bahwa%0D%0Abiosurfaktan+jenis+lipopeptida+dari+bakteri+Bacillus+oceanisediminis+PKT+B3%0D%0Amampu+digunakan+dalam+menginhibisi+korosi+baja.%0D%0A%0D%0AKata+Kunci+%3A+Biosurfaktan%2C+lipopeptida%2C+FT-IR%2C+indeks+emulsi%2C+inhibisi+korosi.%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0AABSTRACT%0D%0A%0D%0ABiosurfactants+are+surface+active+compounds+synthesized+by+microbes+using%0D%0Avarious+carbon+and+nitrogen+sources.+Biosurfactant+is+one+of+the+natural%0D%0Asurfactants+that+is+widely+used+in+various+industries.+This+study+aims+to+obtain+the%0D%0Abest+nitrogen+source+conditions+in+producing+biosurfactant+from+the+bacterium%0D%0ABacillus+oceanisediminis+PKT+B3+originating+from+the+composting+process+of%0D%0Adomestic+waste+and+to+test+its+potential+as+a+corrosion+inhibitor.+The+methods+used%0D%0Aincluded+optimization+of+nitrogen+sources%2C+biosurfactant+production%2C+biosurfactant%0D%0Atesting%2C+biosurfactant+characterization+using+FT-IR%2C+and+biosurfactant+potential+as%0D%0Aa+corrosion+inhibitor+test.+The+optimum+conditions+for+the+nitrogen+source+for%0D%0Abiosurfactant+production+were+obtained+using+0%2C5%25+NH4Cl.+Biosurfactant+from%0D%0Athe+bacterium+Bacillus+oceanisediminis+PKT+B3+has+the+physical+characteristics+of%0D%0Aa+yellowish+white+biosurfactant+of+0.5990+g+with+an+emulsion+index+value+of+70%25.%0D%0AThe+results+of+the+FT-IR+data+analysis+showed+that+there+was+absorption+from%0D%0Afunctional+groups+in+the+region+3273+cm-1+(N-H+stretching)%2C+1531+cm-1+(N-H+and%0D%0AC-N+stretching+deformation)%2C+1629+cm-1+(CO-N+stretching)%2C+1629-1396+cm-1+(C-H%0D%0A(aliphatic+chain))%2C+and+1236-1055+cm-1+(C-N+stretching+(peptide+bond))+which+are%0D%0Acharacteristic+absorption+for+this+type+of+lipopeptide.+The+corrosion+inhibition+test%0D%0Ashows+that+the+addition+of+inhibitor+can+reduce+the+corrosion+rate+with+a+protection%0D%0Apercent+value+of+92.24%25+in+3%25+NaCl+and+53.57%25+in+3%25+NaCl+CO2-saturated+at+a%0D%0Abiosurfactant+concentration+of+150+ppm.+Based+on+the+results+of+this+study%2C+it+can%0D%0Abe+concluded+that+the+lipopeptide+type+biosurfactant+from+the+bacterium+Bacillus%0D%0Aoceanisediminis+PKT+B3+can+be+used+to+inhibit+steel+corrosion.%0D%0A%0D%0AKeywords+%3A+Biosurfactant%2C+lipopeptide%2C+FT-IR%2C+emulsification+indeks%2C+corrosion+inhibition&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM+&rft.date=2023-05-23&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F78006%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F78006%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F78006%2F3%2FSKRIPSI%2520TANPA%2520%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++PUTRI+%2C+KUSWEDARI++(2023)+OPTIMASI+PRODUKSI%2C+KARAKTERISASI%2C+DAN+UJI+INHIBISI+KOROSI+BIOSURFAKTAN+DARI+BAKTERI+Bacillus+oceanisediminis+PKT+B3.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM+%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F78006%2F