Download - Nutrisi Mikrobia
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Nutrisi & Tipe Nutrisis Mikrobia
Nutrien: sumber energi & komponen sel
Nutrisi Mikrobia: Tipe nutrisi mikrobiaTransportasi nutrient
Pertumbuhan populasi mikrobia:Batch culture: fase pertumbuhanContinuous culture: chemostatMetode pengukuran pertumbuhan
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Nutrisi Mikrobia: komponen nutrienMakroelemen: C, H, O, N, S, P: (gr/l) karbohidrat, lipid, protein asam nukleat
Kebutuhan N, S dan P N: sintesis asam amino S: asam amino sistein dan metionin, vitamin (biotin dan
tiamin) P: asam nukleat, fosfolipid dan nukleotida (ATP)
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Makroelemen
K, Ca, Mg dan Fe: (mg/l)K: aktivitas enzim dalam sintesis proteinCa: resistensi panas pada endosporaMg: ko-faktor berbagai enzimFe: penyusun sitokhrom dalam rantai
respirasi
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Nutrisi Mikrobia: komponen nutrien
Mikroelemen (Trace elements): (μg/l)Mn, Zn, Co, Mo, Ni dan CuMn: membantu enzim dalam transfer gugus PZn: berperan dalam sisi aktif enzim pada E.
coliMo: berperan dalam fiksasi NCo: komponen Vitamin B12
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Growth factor
Growth factor: Senyawa organik yang diperlukan karena tidak dapat disintesis oleh sel
Contoh:
• Asam amino
• Purin dan Pirimidin
• Vitamin: kofaktor bagi enzim
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Nutrisi Mikrobia: Tipe nutrisi mikrobia Berdasarkan sumber karbon: Heterotrof: organik, e.g. glukosa Autotrof: anorganik, e.g. CO2
Berdasarkan sumber Energi: Fototrof: cahaya, e.g. cahaya matahari Khemotrof: reaksi kimiawi,e.g. biooksidasi-reduksi (org &
anorg)
Berdasarkan sumber donor elektron: Litotrof: anorganik e.g. H2O, H2S Organotrof: organik, e.g. glukosa
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Nutrisi Mikrobia: Tipe nutrisi mikrobia
1. Foto-litotrofik autotrof : Sianobakteria: Oscilatoria, Nostoc,AnabaenaAlgae: Euglena, Chlamydomonas, VolvoxPurple sulphur bacteria: EctothiorhodospiraGreen sulphur bacteria: Chlorobium
Chloronema
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Tipe nutrisi mikrobia
2. Foto-organotrofik heterotrof: Purple non-sulphur bacteria:
Rhodospirilum, Rhodopseudomonas
Green non-sulphur bacteria:
Chloroflexus,Thermomicrobium
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Tipe nutrisi mikrobia
3. Khemo-litotrofik autotrof: Sulphur oxidizing bacteria: Thiobacillus,
Beggiatoa, ThiotrixHydrogen bacteria: Ralstonia,
AlcaligenesNitrifying bacteria: Nitrosomonas,
Nitrobacter, NitrococcusIron oxidizing bacteria: Thiobacilus,
Gallionella
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Tipe nutrisi mikrobia
4.Khemo-organotrofik heterotrof:
Non-fotosynthetic bacteria: Escherichia, Bacillus, Salmonella
Archaea: Methanococcus, Halococcus Protozoa: Amoeba, Trypanosoma, Plasmodium Fungi: Penicillium, Rhizopus, Mucor, Aspergillus,
Saccharomyces Slime molds: Physarum
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Transportasi Nutrien
1. Passive diffusion
2. Transport protein (uniport, simport, antiport)
3. Facilitated diffusion
4. Active transport
5. Group translocation
6. Chelating transport
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Transport via membran
Difusi pasifProtein transportDifusi terfasilitasiTransport aktifTranslokasi group
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Transport via membran
Proses pasif: difusiosmosisdifusi terfasilitasi
Proses aktif : menggunakan energi Transport aktif Protonmotive force Sodium-potassium pump Group translocation Binding protein transport Cytosis (Eukaryotic specific transport)
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Transport via membran
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Membran transport
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Difusi & osmosis
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Difusi terfasilitasi
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Transport aktif
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Proton Pump
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Translokasi group