scholarly journals Physicochemical properties and microbial group behavior of postharvest peruvian cocoa bean (Theobroma cacao L.)

Enfoque UTE ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 48-56
Author(s):  
Eduardo Salazar ◽  
Roxana Valenzuela ◽  
Margarita Aguilar ◽  
Natali Aranda ◽  
Alejandrina Sotelo ◽  
...  

Cocoa is used in the manufacturing of different products. Fermenting microorganisms such as yeast and bacteria use the high nutrient content of cocoa. This research evaluated physicochemical properties and microbial group behavior of fresh cocoa bean and four treatments to compare among them (A, A-farmer, B, and B-farmer). Moisture content, mold and yeast count, and Salmonella were determined in fresh cocoa beans and treatments. The results of fresh cocoa beans were moisture content of 56.30 ± 0.02 % and microbiological count below control. Treatments results were moisture content of 3.10 ± 0.02 %, 10.30 ± 0.20 %, 4.80 ± 0.00 %, and 11.40 ± 0.20 % (p ≤ 0.05), mold and yeast count were statistically similar (p > 0.05). Salmonella was not detected in any of the treatments. These findings indicate that regardless of post-harvest process, there is no fungal contamination in cocoa when carrying out good manufacturing practices.

Author(s):  
Jumriah Langkong ◽  
Meta Mahendradatta ◽  
Mulyati M Tahir ◽  
Nurlaila Abdullah ◽  
Marina Reski

Cocoa bean husk is one of the product of cocoa which is only utilized as animal feed and has low economic value. Economic value of cocoa bean husks can be enhanced by extracting the husk using methanol into powder and applied to a process product namely cookies. Cookies are types of biscuit which are made from soft dough, high in fat and relatively crisp. The purpose of this study was to determine the amount of powder that was added and its impact to the cookies product. The analysis was done for sensory test, moisture content, fat content and protein content. The result showed that water content ranged from 2.39% - 4.85%. Fat content ranged from 7.57% - 8.64%, and ash content ranged from 0.73% - 2.02%. In the organoleptic test, the color and odor which were preferred by the panelists was treatment A0 (control) whereas the taste and texture was treatment A1 (addition of 5% powder).


2010 ◽  
Vol 8 (3) ◽  
pp. 448-453
Author(s):  
Ratna Agung Samsumaharto

A study was carried out to characterize the cocoa lipase from cocoa beans (Theobroma cacao, L.) of clone PBC 159. The optimum temperature of cocoa lipase was 30-40 °C and the pH optimum was 7.0-8.0. The moleculer weight of the lipase enzyme was in between 45-66 kDa. The results indicate that Km value for cocoa bean lipase was 2.63 mM, when trimyristin was used as a substrate. The incubation of cocoa bean lipase with triolein and tributyrin (as substrate) yielded Km of 11.24 and 35.71 mM, respectively. The Vmax value obtained from the incubation of the lipase with a wide range of substrates, including tributyrin, trimyristin and triolein, are expressed as µmole acid/min/mg protein for cocoa lipase. Vmax values decreased with the increase in the triacylglycerol chain-length, with Vmax values of 27.78, 13.16 and 11.63 µmole acid/min/mg protein when incubated with tributyrin, trimyristin and triolein, respectively. Inhibition of lipase occurred in the presence of diisopropyl flourophosphate, N-bromosuccinimide and 5,5-dithiobis-(-2-nitrobenzoic acid).   Keywords: characterization, lipase, cocoa beans


Author(s):  
Muhammad Isa Dwijatmoko ◽  
Budi Nurtama ◽  
Nancy Dewi Yuliana ◽  
Misnawi Misnawi

Cocoa bean is a rich source of polyphenols, which are the largest group secondary metabolite with natural antioxidant property. Polyphenols from cocoabeans was reported to possess health benefits. Fermentation, one step in cocoa processing is needed to improve the quality of cocoa in which the concentration of cocoa bean polyphenols might decrease significantly through oxidation and exudation. Cocoa polyphenols content among different cocoa clones mightalso vary. The aims of this study were to determine total polyphenols, total flavanoid, epicatechin, and catechin content in several cocoa clones, those wereSulawesi 1, Sulawesi 2, ICCRI 03, and KW 617. Until now, characterization of polyphenols from those clones has not been reported. The effect of five daysfermentation to those parameters was also studied. The results of the study showed that fermentation and type of clones significantly affected total of polyphenols, total of flavanoids, epicatechin, and catechin content of the cocoa, there is also an interaction between fermentation and type of clones. Unfermented of Sulawesi 1 had the highest total polyphenols of 96.94±5.83 mg/g, total flavanoids of 90.92±1.89 mg/g, epicatechin of 52.50±0.46 mg/g, and catechin of 1.99±0.02 mg/g content compared to other clones. Among five days fermented cocoa beans, Sulawesi 2 showed the highest total polyphenols and total flavanoids content, while ICCRI 03 had the highest epicatechin and catechin content than other clones. Thus, in can be concluded that although fermentation is required to improve the flavor quality of cocoa, it significantly reduced the content of bioactive compounds. This effect varied amongdifferent cocoa clones.


Author(s):  
Mulono Apriyanto ◽  
Sutardi ◽  
Supriyanto ◽  
Eni Harmayani

Most cocoa beans in Indonesia are traditionally produced by farmers using non fermented and sun drying method. The quality of cocoa beans produced by farmer in yogyakarta may be improved by the fermentation method. However, it needs optimization for best fermentation process. The aims of the study was to improve quality of cocoa bans by fermentation of sun dried cocoa beans. The characteric fermented cocoa beans was determined by maesuring changes pH, acidity and fermentation indexs of cocoa beans during fermentation. This study used preconditioned cocoa beans to resamble obtain from the farmer. Preconditioning was done in order to get 15% mouisture content of pulp at same level as moisture content of pulp from traditional process. Before fermentation, therefor sun dried cocoa beans was rehydrated to obtain a moisture content of pulp similiar to fresh beans pulp, and then fermentation was conducted for 120 hours. Changes in acidity and fermentation indexs of cocoa beans during fermentation were measured. The fermentation process used 3 level treatment i.e. control (without inoculum), mixed culture of microbies added at the begining fermentation. The result show all cocoa beans acidity increase during fermentation from 4,48% to 6,45% for control, 4,64% to 6,39% for addition of inoculum at begining of fermentation and from 4,45% to 6,59% for addition of inoculum at the begining and midle of fermentation and fermentation indexs of cocoa beans increase for all level of inoculum addition i.e. 0,31 to 0,88 for control, 0,32 to 0,99 for addition of inoculum at the beginning fermentation and 0,33 to 1,03 for addition of inoculum at the beginning and midle of fermentation. The study indicated that addition of mix culture microbies in fermetation improved the quality of cocoa beans that characterized by pH, acidity and fermentation indexs of cocoa beans.


2017 ◽  
Vol 12 (1) ◽  
pp. 34-42
Author(s):  
Melia Ariyanti

The aim of this research was to determine the quality of 5 and 6 days fermented cocoa beans in Belopa, LuwuDistrict, South Sulawesi by ISO 2323-2008. Raw materials used in the study was the cocoa beans from farmers in Batu Titik Village Batu Lappa subdistrict,Belopa, Luwu Districts. Cocoa beans fermented for 5 and 6 days dried in the sun, then analyzed in the laboratory testing BBIHP Makassar. Test parameters based on the quality requirements of ISO 2323-2008 cocoa beans include general conditions and special requirements. The results showedthat the cocoa bean fermentation for 5 and 6 days measuring 94 and 95 seeds per 100 grams, including class A. Based on the general requirements ISO 2323-2008, fermented cocoa beans 5 and 6 days not yet meet the quality requirements for water content, while the special requirements seeds not meet the quality requirements for the levels of impurities. Based on the special requirements, fermented cocoa beans 5 and 6 days of research result fromLuwu Districts including quality III. Keywords: cacao beans, fermentation, quality, ISO 2323-2008.ABSTRAK. Penelitian ini bertujuan untuk mengetahui mutu biji kakao yang difermentasi 5 dan 6 hari di Belopa, Kab. Luwu Sulawesi Selatan berdasarkan SNI 2323-2008. Bahan baku yang digunakan dalam penelitian adalah biji kakao dari petani di Dusun Batu Titik Desa Batu Lappa, Belopa Kab. Luwu. Biji kakao yang telah difermentasi selama 5 dan 6 hari kemudian dikeringkan dengan dijemur di bawah sinar matahari, selanjutnya dianalisa di Laboratorium Pengujian BBIHP Makassar. Parameter uji berdasarkan syarat mutu biji kakao SNI 2323-2008 meliputi syarat umum dan syarat khusus. Hasil penelitian menunjukkan bahwa biji kakao fermentasi 5 dan 6 hari berukuran 94 dan 95 biji per 100 gram, termasuk golongan A. Berdasarkan syarat umum SNI 2323-2008, biji kakao fermentasi 5 dan 6 hari belum memenuhi syarat mutu untuk kadar air, sedangkan syarat khusus biji belum memenuhi syarat mutu untuk kadar kotoran. Berdasar syarat khusus, biji kakao fermentasi 5 dan 6 hari hasil penelitian dari Kab. Luwu termasuk mutu III. Kata kunci: biji kakao,fermentasi, mutu, SNI 2323-2008.


Author(s):  
Indah Anita-Sari ◽  
Agung Wahyu Susilo

Cocoa plant generally is classified as cross pollinated plant and self-incompatible plant, then there is indication the presence of pollen influence on cocoa bean quality. This study was aimed to determine the effect of pollen sources (xenia) on the colour and size characters of fresh cocoa beans (Theobroma cacao L.). This study was done on two stages. The first stage, a treatment of hand pollination of cocoa clones of DR 1, DR 2, DRC 16, KW 264 and ICCRI 03 was applied in this study. There were five treatments of hand pollination: DR 2 x DR 1, DRC 16 x DR 1, DRC 16 X KW 264, DR 1 x DR 2 and ICCRI 03 x DRC 16. Each treatment was repeated four times. Colour parameters of fresh cocoa beans were observed. The second stage consisted of nine hand pollination combinations: TSH 858 x Sulawesi 1, TSH 858 x ICCRI 03, TSH 858 x KW 264, TSH 858 x KW 570, TSH 858 x Sca 6, Sulawesi 1 x TSH 858, Sulawesi 1 x Sca 6, Sulawesi 1 x KW 570 and KW 516 x Sca 6. Each treatment was repeated three times. Size parameters of fresh cocoa pod and beans were observed. The result showed that hybridization using pollen source from bulk cocoa and DR 1 contributed dark colour to fineflavored cocoa. This colour contribution was showed by the increase in the dark fresh percentage of cocoa beans. On the other hand, hybridization using pollen source from fine-flavored cocoa contributed white and pale colour to bulk cocoa. This light colour contribution was showed by the decrease in the percentage of the dark fresh beans. Xenia effect occured on pod weight, pod length, pod girth, bean weight with pulp per pod and bean weight without pulp per pod which was shown by the hybridization with TSH 858 as female parent and weight bean without pulp per pod shown by the hybridization with THS 858 and Sulawesi 1 as female parent. Key word: Xenia, fresh beans colour, fresh beans size, Theobroma cacao L.


2015 ◽  
Vol 34 (04) ◽  
pp. 439
Author(s):  
Yulius Gae Lada ◽  
Supriyanto Supriyanto ◽  
Purnama Darmadji

This research aimed at evaluating the effect of dry cocoa bean soaking and roasting using various type of materials  roaster instrument on the physical properties and profile of volatile compounds of roasted beans as well as sensorial attributes of chocolate bar resulted. Dry beans were soaked into water for 2 h to reduce acidity. Roasting was carried outusing several instruments that were made from aluminum, iron and clay to obtain bean moisture content of 2 – 3.5%. Texture, color, and volatile compounds profile of roasted beans as well as sensorial attributes of chocolate bar were studied. Results showed that roasting cooking period (50 minutes) using clay roasting instrument was faster and hadhighest rate of temperature increase, followed by iron (70 minutes) and aluminum (90 minutes). Dry beans soaking significantly affected beans color (L* and λE value), chocolate bar attributes particularly aroma, acid taste and bitterness, however the instrument material differences had no significant effect on those parameters. The texture of cocoa beansroasted using a roaster of aluminum was the hardest, but it was not affected by the soaking treatment. Roasting of the cocoa beans using a roaster of aluminum, iron and clay produced different profiles on volatile compounds. A roaster of clay produced groups of compounds with the total area of SPME-GC-MS chromatogram was smaller than the roasterof aluminum and iron. The produced chocolate bars through the soaking treatment and roasting using a roaster of clay was preferred by the panelists.Keywords:  Soaking, materials of roaster instrument, roasted cocoa beans, volatile compounds profile, chocolate bar ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh perendaman biji kakao kering dan penyangraian menggunakan berbagai jenis bahan alat sangrai terhadap sifat fisik dan profil senyawa volatil kakao sangrai serta sifat sensoris cokelat batang yang dihasilkan. Biji kakao kering direndam menggunakan air selama 2 jam untuk mengurangi keasaman,kemudian disangrai menggunakan berbagai jenis bahan alat sangrai (alumunium, besi dan tanah liat) hingga kadar air biji kakao sangrai mencapai 2 – 3,5%. Biji kakao kering diamati dan dianalisis sifat fisik dan profil senyawa volatil biji kakao sangrai serta sifat sensoris cokelat batang. Hasil penelitian menunjukkan bahwa penggunaan alat sangrai dari tanah liat lebih cepat dalam mematangkan biji kakao kering menjadi biji sangrai (50 menit) dengan laju peningkatan suhu yang cepat dan tinggi, selanjutnya diikuti dengan alat sangrai yang terbuat dari besi (70 menit) dan alumunium (90 menit). Perlakuan perendaman biji kakao kering berpengaruh nyata terhadap warna biji sangrai (nilai L* dan λE)dan sifat sensoris cokelat batang yang dihasilkan terutama aroma cokelat, rasa asam dan pahit, sedangkan perlakuan bahan alat sangrai tidak berpengaruh nyata. Tekstur biji kakao dari hasil penyangraian menggunakan alat sangrai dari alumunium adalah paling keras, tetapi tidak dipengaruhi oleh perlakuan perendaman. Penyangraian biji kakaomenggunakan alat sangrai dari alumunium, besi dan tanah liat menghasilkan profil senyawa volatil yang berbeda. Dari kromatogram SPME-GC-MS diketahui bahwa alat sangrai dari tanah liat menghasilkan kelompok senyawa dan total luas area yang lebih kecil dibandingkan dengan alat sangrai dari alumunium dan besi. Cokelat batang yang dihasilkan melalui perendaman dan disangrai menggunakan alat sangrai dari tanah liat adalah yang paling disukai oleh panelis.Kata kunci: Perendaman, bahan alat sangrai, biji kakao sangrai, profil senyawa volatil, cokelat batang


2016 ◽  
Vol 10 (1) ◽  
pp. 46-55
Author(s):  
Sari Farah Dina ◽  
Harry P. Limbong

This study aims to determine the performance of a continuous and intermittent sun drying of fermented-cocoa bean by using thin-layer drying method. Continuous drying using a solar dryer finned-flat plate collector type which is operated in two modes drying time, daytime and night time. During the day, the cocoa beans are dried in the drying chamber using hot air generated by the solar collectors. In the nighttime, desiccant (CaCl2) was added to the drying chamber that had been isolated. Open sun drying as intermittent drying of cocoa beans is done only on daytime. The drying process is terminated when equilibrium moisture content has been achieved. The results showed that the continuous drying rate higher than the intermittent drying. Dried-cocoa beans produced from continuous drying showed a lower moisture content (7.34% vs 7.50%), a better physical appearance, but the higher the degree of acidity (pH = 5.93 vs. 6.13). Total fat content and free fatty acids slightly lower than the intermittent sun-drying.ABSTRAKPenelitian ini bertujuan untuk mengetahui performa pengeringan kontinyu dan terputus pada biji kakao fermentasi menggunakan metode pengeringan lapis tipis. Pengeringan kontinyu menggunakan alat pengering surya tipe kolektor pelat datar bersirip yang dioperasikan dalam dua mode pengeringan, waktu siang dan waktu malam. Pada siang hari, biji kakao dikeringkan didalam ruang pengering menggunakan udara panas yang dihasilkan oleh kolektor surya. Pada malam hari desikan (CaCl2) dimasukkan kedalam ruang pengering yang telah diisolasi. Penjemuran langsung biji kakao di matahari sebagai pengeringan terputus dilakukan hanya pada sinag hari. Proses pengeringan dihentikan ketika kondisi keseimbangan kadar air dicapai. Hasil penelitian menunjukkan bahwa pengeringan kontinyu menghasilkan laju pengeringan yang lebih tinggi dibandingkan dengan pengeringan terputus. Biji kakao yang dihasilkan dari pengeringan kontinyu juga menunjukkan kadar air yang lebih rendah (7.34% vs 7.50%), penampilan fisik yang lebih baik, tetapi derajat keasaman lebih tinggi (pH=5,93 vs 6,13). Kadar lemak total dan asam lemak bebas sedikit lebih rendah dibanding penjemuran langsung. Kata kunci : biji kakao fermentasi, pengeringan kontinyu, pengeringan terputus, performa.


Foods ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 2049
Author(s):  
Elodie Jean-Marie ◽  
Didier Bereau ◽  
Jean-Charles Robinson

Theobroma cacao L. is an ancestral cultivated plant which has been consumed by various populations throughout history. Cocoa beans are the basic material occurring in the most consumed product in the world, namely chocolate. Their composition includes polyphenols, methylxanthines, lipids and other compounds that may vary qualitatively and quantitatively according to criteria such as variety or culture area. Polyphenols and methylxanthines are known as being responsible for many health benefits, particularly by preventing cardiovascular and neurodegenerative diseases. Recent studies emphasized their positive role in dietary metabolic disorders, such as diabetes and weight gain. After a brief presentation of cocoa bean, this review provides an overview of recent research activities highlighting promising strategies which modulated and prevented gastro-intestinal metabolism dysfunctions.


2017 ◽  
Vol 12 (2) ◽  
pp. 7-20
Author(s):  
Medan Yumas

Epidermis of cocoa beans contain active compounds that are similar to the active compound in the cocoa pod husk. Epidermis of cocoa beans are suspected to contain active compounds such as  polyphenols, flavonoids, terpenoids/steroids, condensed or polymerized tannins such as catechins and anthocyanins. The bioactive compounds were known to have antibacterial properties on Streptococcus mutans types. The aim of this research were to produce natural active compounds from cocoa bean husk, which have antibacterial activity against Streptococcus mutans. Stages of the study consisted of powdering process of epidermis cocoa beans, extracting fat from epidermis cocoa beans powder, extracting of the antibacterial active compound, solvent evaporation of active compounds extracts from powdered cocoa beans husk, and testing of active compounds produced by Streptococcus mutans. Results showed that the minimum inhibitory concentration (MIC) of the cocoa bean husk extract againsts Streptococcus mutans on a half-day incubation period was 0.25% with an inhibitory diameter of 7.550 mm. While, a two- days incubation period was 0.25% with an inhibitory diameter of 9,900 mm and was bacteriostatic.Keywords: cocoa beans husk, maceration extraction, methanol, antibacterial, active components, Streptococcus mutans ABSTRAK. Kulit ari biji kakao mengandung senyawa aktif yang tidak berbeda jauh dengan kandungan senyawa aktif yang terdapat pada kulit buah kakao dan biji kakao itu sendiri. Kulit ari biji kakao diduga mengandung senyawa aktif polifenol, flavonoid, terpenoid/steroid, tanin terkondensasi atau terpolimerisasi seperti katekin dan antosianin. Senyawa-senyawa bioaktif tersebut diketahui memiliki sifat antibakteri jenis Streptococcus mutans.Tujuan penelitian ini adalah pemanfaatan kulit ari biji kakao sebagai sumber senyawa aktif yang memiliki aktivitas antibakteri terhadap bakteri Streptococcus mutans. Tahapan penelitian terdiri dari proses pembuatan bubuk kulit ari biji kakao, proses ekstraksi lemak dari bubuk kulit ari biji kakao, proses ekstraksi senyawa aktif antibakteri dari bubuk kulit ari biji kakao, proses penguapan pelarut ekstrak senyawa aktif dari bubuk kulit ari biji kakao, dan proses pengujian senyawa aktif yang dihasilkan terhadap Streptococcus mutans. Hasil penelitian menunjukkan bahwa ekstrak limbah kulit ari biji kakao berpotensi sebagai senyawa aktif antibakteri terhadap Streptococcus mutans. Konsentrasi hambat minimum (KHM) ekstrak kulit ari biji kakao terhadap bakteri Streptococcus mutans pada masa inkubasi satu setengah hari adalah 0,25% dengan diameter hambatan sebesar 7,550 mm dan masa inkubasi dua hari adalah 0,25% dengan diameter hambatan sebesar  9,900 mm dan bersifat bakteriostatik.  Kata kunci : kulit ari biji kakao, ekstraksi maserasi, metanol, antibakteri, komponen aktif, Streptococcus mutans


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