Jamhari Jamhari

Dr. Jamhari Jamhari


Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2022 in Food Science and Technology
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TLTiara Uji Lishianawati
Tiara Uji Lishianawati
LYLies Mira Yusiati
Lies Mira Yusiati
JJJamhari Jamhari
Jamhari Jamhari
The effect of black garlic powder on the quality of spent duck meat nuggets during storage was investigated. This study used a completely randomized design with 4×4 factorial. The first factor was black garlic powder (0%, 1%, 2%) and 200 ppm Butylated hydroxytoluene then the second factor was the storage period (0, 10, 20, and 30 days) in refrigerator temperature. Physical quality, chemical quality, antioxidant activity, and total plate count (TPC) data were collected and analyzed using analysis of variance. Sensory quality data were collected and analyzed using the Kruskal–Wallis test. The results showed that the addition of 2% black garlic powder significantly increased (P<0.01) the color redness (a*), total phenol, and 2,2-diphenyl-1-picrylhydrazyl (DPPH) inhibition. However, it decreased (P<0.05) the pH, lightness (L*), peroxide value, TPC, color, aroma, and acceptability. Storage time increased (P<0.05) was decreased the pH, L*, a*, tenderness, protein, total phenol, and DPPH inhibition but increased (P<0.01) the yellowness (b*), peroxide value, and TPC. The addition of 1% black garlic powder was recommended to increase the spent duck meat nugget quality during storage without decreased the sensory quality of nuggets.

1 May 2024 in Journal of Agricultural Sciences
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ASAbi Pratiwa Siregar
Abi Pratiwa Siregar
DDDwidjono Hadi Darwanto
Dwidjono Hadi Darwanto
IIIrham Irham
Irham Irham
JMJangkung Handoyo Mulyo
Jangkung Handoyo Mulyo
JJJamhari Jamhari
Jamhari Jamhari
NWNadila Puspa Arum Widjanarko
Nadila Puspa Arum Widjanarko
Purpose: The agricultural sector has an essential role in developing the economy of Indonesia (food, feed, raw materials for industry, contributor to gross domestic product, and labor absorption). For decades, this business field has survived (positive economic growth, while most of the business field faces contraction) during the country’s economic shock (financial crisis, economic setback, and pandemic situation). Thus, this study aims to measure Indonesia’s agricultural sector’s resilience and trends.Research Method: Secondary data have been collected from various sources: The UN Comtrade, World Bank, Central Bureau of Statistics, Ministry of Agriculture, Bank Indonesia, and Investing Coordinating Board of Indonesia. Moreover, principal component analysis is used to determine the index of agricultural sector resilience in Indonesia, while trend analysis is employed to investigate the development of the resilience index from time to time.Findings: The resilience of the agricultural sector varies from time to time. However, it is statistically proven (a = 1%) that resilience tends to increase over the last twelve years.Research Limitations: The variables to determine the agricultural sector resilience in Indonesia consist of trade balance, agricultural terms of trade, total investment, government spending in the agricultural sector, total credit, agricultural workers’ income, and percentage of agricultural workers to total workers. It is suggested that the future study, employed non-agricultural parameters such as environmental conditions and research and development budget to capture a more comprehensive situation on agricultural sector resilience.Originality/ Value: This study contributes to the renewal of the literature on the resilience of the agricultural sector. Moreover, the variables used to represent the parameters of agricultural development in Indonesia may be applied in other countries.

20 August 2021 in Foods
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RSRio Olympias Sujarwanta
Rio Olympias Sujarwanta
Michel BeyaMichel Beya
Michel Beya
DUDesi Utami
Desi Utami
JJJamhari Jamhari
Jamhari Jamhari
ESEdi Suryanto
Edi Suryanto
LHLouwrens Hoffman
Louwrens Hoffman
Meatballs are popular in Asia and traditionally made from beef or chicken with tapioca (≈8% wt/wt) as filler. Tapioca has a high glycaemic index (GI); therefore, rice bran was evaluated as a substitute to create a healthier meatball of acceptable quality. Substitution of tapioca with rice bran (100:0; 75:25, 50:50; 25:75; 0:100% tapioca: % rice bran) decreased the starch content (7.8 to 3.3%) and GI (56.08 to 43.85) whilst increasing the protein (10.9 to 12.8%) and fibre (8.1 to 10.3%) contents. Although consistency (995 to 776 N/mm) was affected, firmness (90.6 to 90.5 N) and shear force (300 to 312 N) were only slightly affected by the ratio of tapioca to rice bran. Sensory analysis revealed that the goat meatball with the substitution of tapioca with up to 25% rice bran was deemed acceptable by 40 Indonesian consumers.

5 January 2021 in Veterinary World
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Journal Article
Open access
APArby'IN Pratiwi
Arby'IN Pratiwi
THThoyib R. Hakim
Thoyib R. Hakim
MAMohammad Z. Abidin
Mohammad Z. Abidin
NFNanung Agus Fitriyanto
Nanung Agus Fitriyanto
JJJamhari Jamhari
Jamhari Jamhari
YEYuny Erwanto
Yuny Erwanto
Background and Aim: Angiotensin-converting enzyme (ACE) is one of the inhibitory enzymes isolated from animals for the treatment of hypertension. ACE inhibitor (ACE-I) peptides can be obtained by hydrolyzing proteins from various animal tissues, including muscle and connective tissues. However, the study on ACE-I activity from collagen of Kacang goat skin has not been conducted. This study explores the potency of collagen from Kacang goat skin as a source of an antihypertensive agent through ACE inhibition. Thermolysin will hydrolyze collagen and produce the peptide classified antihypertensive bioactive peptides. This study aimed to determine the potential of thermolysin to hydrolyze collagen of Kacang goat skin for ACE-I peptide production and to identify the production of ACE-I peptides. Materials and Methods: Collagen from Kacang goat skin was hydrolyzed with thermolysin and incubated at 37°C for 1 h. Molecular weight (MW) evaluation was performed by SDS PAGE; fractionation peptides at <5 kDa, 3-5 kDa, and 5 kDa was 3.93±0.72 mg/mL, content of 3-5 kDa was 3.81±0.68 mg/mL, and that of <3 kDa was 2.33±0.38 mg/mL. Fractionation was performed 3 times and one of the results was selected for the ACE-I test. The selected fraction was tested by IC50 measurement with three repetitions and it showed an average enzyme activity at 0.83 μg/mL or 82.94 mg/mL. Conclusion: Thermolysin hydrolysis of collagen from Kacang goat skin showed the potential to produce bioactive peptides, such as ACE-I.

7 August 2018 in Jurnal Ketahanan Nasional
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UYUmi Yuminarti
Umi Yuminarti
DDDwidjono Hadi Darwanto
Dwidjono Hadi Darwanto
JJJamhari Jamhari
Jamhari Jamhari
SSSubejo Subejo
Subejo Subejo
This study examines the shifting cultivation farming and settled farming by Arfak farmers, and their implications on the community food security. The research is conducted in Minyememut and Arion Villages at Hink District, and Suteibey and Igymbai Villages at Anggi District of Arfak Mountains Regency of West Papua Province. The objective of the study is to compare potato farming, productivity and farmer income from potato farming. The research uses analytical descriptive method, and in-depth interviews techniques for data collection, by using questionnaires, field observation and documentation. Data analysis is done by tabulation analysis, data interpretation and conclusion withdrawal. The results show that potato farming is still done by using shifting cultivation system. However, there has been a settled farming practice in Arfak Mountains Regency. Although the system used is different, but the two of the agricultural practices are still using the same technology. Potato farms’ area of shifting cultivation is larger than the settled farming, so the production is greater. On the other hand, the productivity of settled farming is higher than the shifting cultivation system. This condition shows that the shifting cultivation farming and settled farming have implications for supporting community food security in Arfak Regency.ABSTRAKPenelitian ini mengkaji usahatani kentang perladangan berpindah dan usahatani menetap yang dilakukan petani Arfak dan implikasinya pada ketahanan pangan masyarakat. Penelitian ini dilakukan di kampung Minyememut dan Arion Distrik Hink, dan kampung Suteibey dan Igymbai Distrik Anggi Kabupaten Pegunungan Arfak Provinsi Papua Barat. Tujuan penelitian adalah melakukan komparasi usahatani kentang, produktivitas dan pendapatan petani dari usahatani kentang. Metode dalam penelitian ini adalah diskriptif analitis, dan teknik pengumpulan data dengan wawancara mendalam menggunakan kuisioner, observasi lapang dan dokumentasi. Analisis data dilakukan dengan analisis tabulasi, interpretasi data serta penarikan kesimpulan. Hasil penelitian menunjukkan bahwa usahatani kentang masih dilakukan dengan cara perladangan berpindah, namun telah ada yang mempraktekkan secara menetap di Kabupaten Pegunungan Arfak. Meskipun sistem yang digunakan berbeda, tetapi kedua praktek pertanian tersebut masih menggunakan teknologi sama. Lahan tanaman kentang pada perladangan berpindah lebih luas, sehingga produksi lebih banyak. Namun produktivitas lahan usahatani menetap lebih tinggi dibanding perladangan berpindah dan secara statistik terdapat perbedaan. Sedangkan pendapatan yang diperoleh petani tidak terdapat perbedaan. Keadaan ini menunjukkan usahatani kentang perladangan berpindah dan usahatani menetap berimplikasi mendukung ketahanan pangan masyarakat di Kabupaten Pegunungan Arfak.

1 June 2012 in Jurnal Ekonomi Pembangunan: Kajian Masalah Ekonomi dan Pembangunan
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JJJamhari Jamhari
Jamhari Jamhari
This research aims to investigate effectiveness of rice for the poor program (Raskin) in rural and urban Indonesia based on the National Socio Economic Survey data (Susenas) collected by Central Bureau of Statistic (BPS) in 2007. Number of sample was 52,370 households. Effectiveness of Raskin Program was measured by target, quantity and price accuracy indexes. Logistic regression model was used to identify factors affecting probability of a household to receive raskin or not. The results of analysis show that raskin distribution was not yet accurately reach the target beneficiaries. Raskin distribution was also not accurate in quantity and price. Quantity accuracy index was 58 percent in rural, 53 percent in urban and 57 percent in Indonesia. Price quantity index was 68 percent in rural, 63 percent in urban and 67 percent in Indonesia. Probability of a household to receive raskin was affected by education, gender, age, household member, income, employment, floor condition and location.