1. Zeolite, U.N., 2019. Heating value enhancement by biogas purification using natural zeolite and rice straw-based biochar. Int. J., 16: 80-85.
2. Wuri, M.A., A. Pertiwiningrum and R. Budiarto, 2019. Carbon dioxide adsorption on chicken manure or biogas sludge derived biochar and its modification to enrich methane composition in biogas. Res. J. Chem. Environ., 23: 91-98.
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3. Pertiwiningrum, A., A.W. Harto, M.A. Wuri and R. Budiarto, 2019. Assessment of calorific value of biogas on carbon dioxide adsorption process using natural zeolite and biochar. Int. J. Environ. Sci. Dev., 9: 327-330.
4. Wuri, M.A., A. Pertiwiningrum, R. Budiarto and C.D. Koranto, 2018. Characterization of natural zeolite and chicken manure derived biochar for carbon dioxide adsorption in biogas. E3S Web of Conf., Vol. 43 10.1051/e3sconf/20184301008.
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5. Winarti, A., N.A. Fitriyanto, A. Pertiwiningrum, Z. Bachruddin, Y. Pranoto and Y. Erwanto, 2018. Optimizing of protease purification from bacillus cereus td5b by ammonium sulfate precipitation. Chem. Eng. Transact., 63: 709-714.
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6. Wahyuningsih, R., R. Nurliyani, A. Pertiwiningrum, A. Rohman, N.A. Fitriyanto and Y. Erwanto, 2018. Optimization of acid soluble collagen extraction from indonesian local “kacang” goat skin and physico-chemical properties characterization. Chem. Eng. Transact., 63: 703-708.
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7. Wahyuningsih, R., Nurliyani, Rusman, A. Pertiwiningrum, A. Rohman, N.F. Agus and Y. Erwanto, 2018. Optimization of conditions for extraction of pepsin-soluble collagen from indonesian local “kacang” goatskin by response surface methodology. Am. J. Anim. Vet. Sci., 13: 70-75.
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8. Pertiwiningrum, A., D.J. Hapsari, P. Ratnaningrum, A. Kurniawati and R.N. Dwi, 2018. Effects of adding chicken blood meal and fishmeal to sludge biogas as white oyster mushroom media. Pak. J. Boil. Sci., 21: 29-37.
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9. Pertiwiningrum, A., C. Agus, Supriadi, A. Fahmi and Y. Soeherman, 2018. Development of food security through integrated bio-cycles farming system in manokwari, papua, Indonesia. Int. J. Environ. Agric. Res., 4: 28-35.
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10. Agustina, U.P., A. Prasetya and A. Pertiwiningrum, 2018. Optimization of the use of farm waste and water hyacinth for earthworm (Lumbricus rubellus) cultivation media. Bulet. Petern., Vol 42. 10.21059/buletinpeternak.v42i2.31581.
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11. Pertiwiningrum, A., J.S.P. Silaban, A. Prasetya and Rochijan, 2017. Implementation of upflow anaerobic sludge blanket digester to produce household-scale biogas. J. Appl. Sci., 17: 392-399.
12. Pertiwiningrum, A., F.D. Anggraini, N.A. Fitrianto and R. Rochijan, 2017. Isolation and identification of bacterial protease enzyme of leather waste. J. Indonesian Trop. Anim. Agric., 42: 33-41.
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13. Pertiwiningrum, A., E.C. Budyanto, M. Hidayat, Rochijan, Y. Soeherman and M.F. Habibi, 2017. Making organic fertilizer using sludge from biogas production as carrier agent of trichoderma harzianum. J. Biol. Sci., 17: 21-27.
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14. Pertiwiningrum, A., E. Susilowati, Rochijan, N.A. Fitriyanto, Y. Soeherman and M.F. Habibi, 2017. Potential test on utilization of cow's rumen fluid to increase biogas production rate and methane concentration in biogas. Asian J. Animal Sci., 11: 82-87.
15. Junaidi, Y., A. Pertiwiningrum, Y. Erwanto and N.A. Fitriyanto, 2017. Semi purification and identifications molecule protein weigh of alkaline protease enzyme from bacillus cereus LS2B. Int. J. Bio-Sci. Bio-Technol., 9: 89-100.
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16. Gumilar, J., L.M. Yusiati, A. Pertiwiningrum, T. Nakagawa and S. Triatmojo, 2017. A novel extracellular keratinase from exiguobacterium Sp. DG1: Enzyme production and dehairing application. Leather Footwear J., 17: 209-216.
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17. Pertiwiningrum, A., N. Hidayah and S. Syamsiah, 2016. The use of sludge from cow manure biodigester as fertilizer and carrier of cordyceps sp. for white grub pest control. J. Agric. Sci. Technol., 6: 149-153.
18. Guntoro, B., B.P. Widyobroto, N. Umami, Indratiningsih, S. Nurtini, A. Pertiwiningrum and Rochijan, 2016. Marketing and institusional characteristics of dairy industry in Indonesia. Int. J. Environ. Agric. Res., 2: 106-114.
19. Fitriyanto, N.A., F.I. Yani, Y. Erwanto, S. Triatmojo and A. Pertiwiningrum, 2016. Ability of nitrate removal and growth behaviors of isolated bacteria from dairy farm at tropical area. Asian J. Microbiol. Biotechnol. Environ. Sci., 18: 1-7.
20. Gumilar, J., S. Triatmojo, M. Lies and A. Pertiwiningrum, 2015. Isolation, Identification and Dehairing Activity of Indonesian Native Keratinolytic Bacteria Exiguobacterium SP. DG1. Pak. J. Biotechnol., 12: 41-48.
21. Yongabi, K., L. Avery and A. Pertiwiningrum, 2014. A commentary on occupational infectious diseases due to agricultural practices in Sub-Saharan Africa, Scie. Biomass Bioenergy, 70: 99-111.
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22. Pertiwiningrum, A., E. Susilowati, R. Rochijan and M.F. Habibi, 2014. Potential Test on Utilization of Cow`s Rumen Fluid to Increase Biogas Production Rate and Methane Concentration in Biogas. Asian J. Anim. Sci., 11: 82-87.
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23. Anchang, K.Y., L. Avery and A. Pertiwiningrum, 2014. A commentary on occupational infectious diseases due to agricultural practices in sub-Saharan Africa. Biomass Bioenergy, 70: 99-111.
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24. Wahyuni, E., A. Pertiwiningrum and S.A. Suwarti, 2013. Identification of aspergillus species using morphological characteristic and the effect of temperature on the protease activity. Int. J. Biochem. Biotechnol., 2: 298-301.
25. Syafei, Y., S. Triatmojo and A. Pertiwiningrum, 2013. The utilization of aspergillus sp. And rhizopus sp. Protease at different Concentration in unhairing phase of tanning on physical quality of sheep Leather and liquid waste. Bull. Anim. Sci., 37: 198-206.
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26. Sompie, M., S. Triatmojo and A. Pertiwiningrum, 2013. Pengaruh Umur Potong dan Konse ntrasi Larutan Asam Asetat terhadap Sifat Fisik dan Kimia Gelatin Kulit Babi. Sains Peternakan, 10: 15-22.
27. Indratiningsih, E. Wahyuni, A. Pertiwiningrum and S.A. Suwarti, 2013. Identification of aspergillus species using morphological characteristic and the effect of temperature on the protease activity. Int. J. Biochem. Biotechnol., 2: 293-301.
28. Sompie, M., S. Triatmojo, A. Pertiwiningrum and Y. Pranoto, 2012. The Effect of Animal Age and Acetic Acid Concentration on Pigskin Gelatin Characteristics. J. Indonesian Trop. Anim. Agric., 37: 176-182.
29. Gamayanti, K.N., A. Pertiwiningrum and L.M. Yusiati, 2012. Influence of the use rumen liquid waste and peat mud as starter on Methanogenic fermentation processes. Bull. Peternakan, 36: 32-39.
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30. Fitriyanto, N.A., M. Nakamura, S. Muto, K. Kato and T. Yabe et al., 2011. Ce³⁺ -induced exopolysaccharide production by Bradyrhizobium sp. MAFF211645. J. Biosci. Bioeng., Vol. 111. .
31. Fitriyanto, N.A., M. Fushimi, M. Matsunaga, A. Pertiwiningrum, T. Iwama and K. Kawai, 2011. Molecular structure and gene analysis of Ce₃₊-induced methanol dehydrogenase of Bradyrhizobium sp. MAFF211645. J. Biosci. Bioeng., Vol. 111. .
32. Agus, C., B.H. Sunarminto, B. Suhartanto, A. Pertiwiningrum, Wiratni, S. Iwan and P. Dibyo, 2011. Integrated bio-cycles farming system for production of bio-gas through gama digester, gama purification and gama compressing. J. Jpn. Inst. Energy, 90: 1085-1089.
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