Durian Research Articles

Durian Fruits Discovered as Superior Folate Sources.

Durian (Durio zibethinus) is a tropical fruit grown in Southeast Asia and highly appreciated by consumers throughout Asia. Folates are a group of vitamins and are essential nutrients for humans. Here we present the folate analysis of different durian cultivars as well as diverse durian products. An LC-MS/MS method and the application of a stable isotope dilution assay (SIDA) was used for quantitation of the folate vitamers 5-methyltetrahydrofolate, 5-formyltetrahydrofolate, 10-formylfolate, tetrahydrofolate, and pteroylmonoglutamic acid by using [13C5]-labeled internal standards. Total folates varied from 175 to 440 μg/100 g for durian arils and from 15.0 to 417 μg/100 g for durian products. These contents are extraordinarily high compared to other fruits and may be correlated to the upregulated methionine biosynthesis pathway reported recently. In summary, the tropical fruit durian can be considered as a very rich dietary source of natural folates.

New species of genus Mudaria Moore, 1893 and the first record of Mudaria cornifrons Moore, 1893 from Thailand (Lepidoptera, Noctuidae, Noctuinae).

The Noctuidae genus Mudaria Moore, 1893, as treated in this paper, comprises 20 species distributed in the Oriental region from India to Fiji, with its centre of diversity in the Sundaland. The biology of the genus is unusual, in that the larvae bore into the fruits or pods of plants in family Bombacaceae (Holloway 1989) and Sterculiaceae (Robinson et al. 2001). Larvae of M. cornifrons have been recorded in the pods of silk-cotton tree (Bombax), in pods of kapok (Ceiba pentandra), in durian fruits (Durio) (Roepke 1916, Holloway 1989, Tan Tan 1991 [1992], Kuroko Lewvanich 1993) and in Pterospermum fruit (Robinson et al. 2001). On Bombax mature larvae emerge from fallen pods and tunnel into the soil to pupate in an earthen cocoon lined with silk (Holloway, 1989). Adult emergence is timed to coincide with the flowering of the host.

Kinetics, mechanism, and thermodynamics of lanthanum adsorption on pectin extracted from durian rind

The rare-earth elements in aqueous waste streams have received great attention due to their potential to pollute the environment. Lanthanum is one of the most used rare-earth elements in industries and disposed as waste. Several efforts have been devoted to remove lanthanum from waste water systems. This study was focused on the adsorption of lanthanum from aqueous solutions by using pectin extracted from durian rind, which is home and industrial waste of durian fruit. Adsorption experiments were carried out in batch method, and the effects of contact time, initial concentration of lanthanum ion, pH of medium, pectin dosage, and temperature on the adsorption efficiency were investigated. The kinetics, mechanism, and thermodynamics of lanthanum adsorption on the pectin were also evaluated. The results demonstrated that the pectin as a cost-effective biosorbent could remove lanthanum with efficiency as high as 41.2 mg/g (at the optimum conditions: pH 4.0, 25 °C, 90 min). The adsorption process of lanthanum on the pectin is well described by either Freundlich or Temkin isotherm model, indicating that adsorption occurs mainly on multilayers and heterogeneous surfaces of pectin. Thermodynamic quantities suggested that the adsorption of lanthanum on the pectin was exothermic and spontaneous, and the reaction was feasible. We also showed that the spent adsorbent can be regenerated up to a limited number of times, upon strong base treatment.

Non-destructive measurement of dry matter in mature ‘Long-lab-lae’ durian fruits using portable NIR spectrometer

Non-destructive measurement of dry matter in mature ‘Long-lab-lae’ durian fruits using portable NIR spectrometer

Bioethanol Production from Cassava (Manihot esculenta) Peel Using Yeast Isolated from Durian (Durio zhibetinus)

The process of ethanol production generally involves pretreatment, hydrolysis of lignocellulosic biomass to fermentable sugars followed by fermentation of such sugars to ethanol. Waste of the cassava peel (Manihot esculenta) was hydrolysed by using sulphuric acidThis research aimed to produce of bioethanol as an alternative source of fuel using cassava peels as raw materials. Yeast isolated from Durian fruit (Durio zhibetinus) was used in the experiment for fermentation and the concentration of sulphuric acid of hydrolysis process was fermented by yeast for 1; 2; 3; 4; 5; 6; 7; and 8 days. 50 ml of Sodium Hydroxide NaOH was prepared to be added at this step to adjust the pH of the slurry until 5 and the temperature was kept at 25 °C. Nine samples were prepared at different three hydrolysis times at 121°C for 30 minutes, 45 minutes and 60 ninutes. For glucose consumption and ethanol product analysis, 2 ml of the sample were taken out at every 2 days interval until 8 days. During this fermentation process, sugar consumption was measured by DNS method, while quantification of ethanol was analyzed by Gas Chromatography. The result of this study obtained that the best time of hydrolysis process was 45 minute, where the result of concentration of glucose was 11.189 %. By virtue of that, fermentation process was influenced by shaking incubator at 6 days. the optimum concentration of sulphuric acid of the hydrolysis process was 30 minute, and duration time of fermentation process by shaking incubator was 8 days, while the concentration of bioethanol for the highest of hydrolysis and fermentation process was obtained 1.63 % ethanol.

Inovasi Olahan Durian

Kenagarian Barung Barung Belantai Selatan Kecamatan Koto XI Tarusan merupakan nagari pemekaran tahun 2009 dari kenagarian induk Barung Barung Belantai. Daerah ini memiliki potensi pertanian yang sangat besar seperti tanaman gambir, pala, cengkeh, karet terutama tanaman durian yang melimpah. Melimpahnya potensi ini bisa dilihat disepanjang jalan Padang-Painan, banyak pedagang durian berjejeran, dan ini menjadi daya tarik tersendiri bagi orang yang datang berkunjung ke Pesisir Selatan. Pengunjung pasti singgah untuk sekedar mencicipi rasa buah durian yang terkenal enak dan legit. Setiap panen durian buah melimpah sehingga harga jual durian terkadang menjadi murah. Belum lagi biaya transportasi membawa panen durian dari ladang/perkebunan warga membutuhkan biaya yang besar. Akibatnya warga terkadang membiarkan saja panen durian terbuang sia-sia. Universitas Negeri Padang melaksanakan pelatihan bagi ibu-ibu rumah tangga membuat aneka olahan durian menjadi cake durian dan wingko durian. Wali nagari setempat mengharapkan warga dapat mengolah durian menjadi makanan khas dan oleh-oleh dari daerah ini sehingga mampu meningkatkan ekonomi keluarga serta mendukung pengembangan pariwisata Pesisir Selatan.

Physicochemical factors related to ‘Monthong’ durian fruit maturity

Physicochemical factors related to ‘Monthong’ durian fruit maturity

Effects of Durian Fruit on Blood Pressure of Spontaneously Hypertensive Rats

Durian or scientifically known as Durio zibethinus is one of the most well-known seasonal fruits in the Southeast Asia region. However, its safe consumption in individuals with hypertension is still controversial. This study was conducted to investigate the effect of durian on blood pressure of spontaneously hypertensive rat model. Four groups of rats (n=5) were fed with either a low dose durian (26 g/kg), a high dose durian (52 g/kg), sugar solution (8 mL/kg) which has similar sugar composition in the durian as placebo control, and distilled water as vehicle control (8 mL/kg) for 14 days. The durian doses for rats were obtained by converting from human doses. Baseline reading of blood pressure and heart rate were recorded before the first oral administration of durian. The blood pressure and heart rate were also measured 1 h after the durian oral administration on day 1, 3, 7 and 14 of the experiment. In conclusion, durian fruit possessed an acute effect on the blood pressure of hypertensive rats but heart rate was unaffected. High dose administration of durian led to significant elevation of blood pressure after 1 h of consumption. Meanwhile, low dose of durian (26 g/kg) caused an insignificant reduction in systolic and diastolic blood pressure. Tolerance to the durian fruit was observed after three to seven days of the oral administration and low dose consumption of durian fruit was safe in the hypertensive rat.

A review on the nutritional, medicinal, molecular and genome attributes of Durian (Durio zibethinus L.), the King of fruits in Malaysia.

Durian (Durio zibethinus L.; Family Bombacaceae) is an iconic tropical fruit plant cultivated in Malaysia and the Southeast Asian countries. In Malaysia, durian is recognised as the King of fruits and well known as a rich source of volatile sulphur compounds that make it unique. Fruit pulp of this fruit is an excellent source of nutrients as it contains proteins, dietary fat, fibers, and carbohydrates. Durian leaf and root decoctions are known to have a febrifuge and anti-malarial properties. The understanding of this plant's molecular biology will help breeders to develop a strategy for its further improvements. Hence, there is a need to identify and understand the genes necessary for the quality improvement of the durian fruits. Its genome contains about 46,000 genes which is almost double that of humans (Homo sapiens). The understanding of durian genes will be useful not only in the molecular breeding but also in the microbial production of novel proteins and or enzymes. This review highlights nutritional and medicinal attributes of durian. The molecular studies including the importance of undertaking transcriptomics work and the insights from the most recently reported genome draft are also highlighted.

Metabolic variation in the pulps of two durian cultivars: Unraveling the metabolites that contribute to the flavor

Durian (Durio zibethinus M.) is a major economic fruit crop in Thailand. In this study, two popular cultivars, namely Chanee and Mon Thong, were collected from three orchards located in eastern Thailand. The pulp metabolome, including 157 annotated metabolites, was explored using capillary electrophoresis-time of flight/mass spectrometry (CE-TOF/MS). Cultivars and harvest years had more impact on metabolite profile separation than cultivation areas. We identified cultivar-dependent metabolite markers related to durian fruit quality traits, such as nutritional value (pyridoxamine), odor (cysteine, leucine), and ripening process (aminocyclopropane carboxylic acid). Interestingly, durian fruit were found to contain high amounts of γ-glutamylcysteine (810.3 ± 257.5 mg/100 g dry weight) and glutathione (158.1 ± 80.4 mg/100 g dry weight), which act as antioxidants and taste enhancers. This metabolite information could be related to consumer preferences and exploited for durian fruit quality improvement.

The Possible Reduction Mechanism of Volatile Sulfur Compounds during Durian Wine Fermentation Verified in Modified Buffers.

Durian fruit is rich in volatile sulfur compounds (VSCs), especially thiols and disulfides, which contribute to its onion-like odor. After fermentation, these VSCs were reduced to trace or undetectable levels in durian wine. The possible reduction mechanism of these VSCs (especially diethyl disulfide and ethanethiol) was investigated in a modified buffer in the presence of sulfite at different pH. An interconversion between diethyl disulfide and ethanethiol was found to be dependent on the pH: the higher the pH, the higher production of ethanethiol. It is suggested that, during durian wine fermentation, disulfides endogenous to durian pulp might be firstly converted into their corresponding thiols in the presence of reductant sulfite formed by yeast. The produced thiols as well as the thiols endogenous to the durian pulp were then removed by the mannoproteins of yeast lees.

An ironic twist of fate: replacement name for Stenogyra gracilenta Morelet, 1885, not Achatina gracilenta Morelet, 1867 (Mollusca, Gastropoda, Achatinidae).

During work on a monograph of Morelet's contributions to malacology (Breure, Audibert Ablett, forthcoming) we found that two of his newly introduced taxa currently have to be considered as homonyms belonging to the genus Subulina H. Beck, 1837 (classified within the family Achatinidae according to Fontanilla et al. (2017: 385)). The older taxon is Achatina gracilenta which was described by Morelet (1867: 79, pl. 7 fig. 2) from [Angola] "Golungo-Alto, au bord du Rio Quiapose, près de Sange; les environs de Lopollo (district de Huilla)". According to Naggs (1990a: 31; also pers. comm. 10 October 2017) this species has to be classified as Subulina gracilenta (Morelet, 1867). The type material of this species is present in the Natural History Museum, London (NHMUK 1893.2.4.263-265). The younger taxon was described by Morelet (1885: 25, pl. 2 fig. 8) as Stenogyra gracilenta from [Gabon] "environs de Mayumba". Pilsbry (1906: 82) already recognised this as Subulina gracilenta (Morelet, 1885); Naggs (pers. comm. 10 October 2017) confirmed this classification and concluded that this taxon is a junior secondary homonym of Achatina gracilenta Morelet, 1867. Type material for Stenogyra gracilenta Morelet, 1885 has not been located. We here propose Subulina bruggenorum nom. nov. as a replacement name for Stenogyra gracilenta Morelet, 1885 (not Achatina gracilenta Morelet, 1867).

Probiotic Properties of Exopolysaccharide-Producing Lactobacillus Strains Isolated from Tempoyak.

Tempoyak is a functional Malaysian food (an acid-fermented condiment) which is produced from the pulp of the durian (Durio zibethinus) fruit. The current study aimed to isolate and identify potential exopolysaccharide (EPS)-producing Lactobacillus strains from tempoyak for potential use as probiotics. Seven isolates (DUR2, DUR4, DUR5, DUR8, DUR12, DUR18, and DUR20) out of 44 were able to produce EPS, and exhibited resistance to acid and bile salt compared to the reference strains Lactobacillus rhmnosus (ATCC53103) and L. plantarum (ATCC8014). The seven isolated strains belonged to five different species—L. plantarum, L. fermentum, L. crispatus, L. reuteri, and L. pentosus—which were identified using API 50 CHL and 16S rRNA gene sequences (Polymerase chain reaction, PCR – based). The seven strains displayed different ability to produce EPS (100–850 mg/L). Isolates exhibited a high survivability to acid (pH 3.0), bile salts (0.3%), and gastrointestinal tract model (<70%). Results showed that the auto-aggregation and cell surface hydrophobicity ranged from 39.98% to 60.09% and 50.80% to 80.53%, respectively, whereas, the highest co-aggregation value (66.44%) was observed by L. fermentum (DUR8) with Pseudomonas aeruginosa. The isolates showed good inhibitory activity against tested pathogens, high antioxidant activity (32.29% to 73.36%), and good ability to reduce cholesterol (22.55% to 75.15%). Thus, the seven tested strains have value as probiotics.

Development of Tourism Industry and National Economic Security

Tourism is an economic or income generating engine for economic development in a country, without exception in Indonesia. However, in fact the development of tourism industry has not been optimally done. The tourism industry should be developed by every country for eight main reasons: (1) Tourism as a trigger factor for national and international economic development. (2) The trigger of prosperity through the development of communication, transportation, accommodation, other services. (3) Special attention to cultural preservation, social values for economic value. (4) Equity of welfare caused by the consumption of tourists in a destination. (5) Foreign exchange earner. (6) The trigger of international trade. (7) Triggers the growth and development of professional education institutions and special institutions that form the soul of hospitality that is reliable and polite, and (8) market share for local products so that the variety of products continues to grow, along with the socio-economic dynamics in the area of a destination. Kabupaten Ngawi has huge tourism potential, one of which is in Ngrambe Sub-district. Potential tours include: Waterfall Bride, Waterfall Suwono, Omah Watu, rambutan garden, durian garden, rambutan garden, guava garden, salak garden, owl breeding, pagupon-pagupon. Nevertheless the great tourism potential has not been developed and managed optimally. The problems related to the tourism industry in Ngawi Regency are as follows. (1) There are many potential natural tourism objects, but not yet managed properly. (2) No well developed tourism program (3) Productivity and community welfare is relatively low. The above problems can be solved by the following methods. (1) Revitalization Program of Nature Tourism Object. (2) Natural Tourism Development Program. (3) Community Empowerment Program Around Object Nature Tourism.

Forest gardens management under traditional ecological knowledge in West Kalimantan, Indonesia

Winarni B, Lahjie AM, Simarangkir B.D.A.S., Yusuf S, Ruslim Y. 2018. Forest gardens management under traditional ecological knowledge in West Kalimantan, Indonesia. Biodiversitas 19: 77-84. Local wisdom of Dayak Kodatn people in West Kalimantan in forest management shows that human and nature are in one beneficial ecological unity known as Traditional Ecological Knowledge (TEK). Former cultivation forest areas are managed in various ways, including planting forest trees, fruit-producing plants, and rubber trees until they transform into the forest garden. This research used three models, monoculture rubber cultivation (Model 1), combined rubber and camphor cultivation (Model 2), and combined rubber and durian cultivation (Model 3). This research intended to: (i) analyze the production of rubber latex and durian fruit; (ii) analyze the growth increment of camphor and durian trees; (iii) analyze the financial feasibility of rubber tree plantation, combined rubber and camphor tree plantation, and combined rubber and durian trees plantation; (iv) formulate the model of rubber cultivation. This research also used measurement methods other than field measurement, which were tree diameter and height, rubber latex and durian fruit weight, and questionnaire interviews. The maximum productions of rubber latex from three models were achieved at the age of 17 years, while maximum production of durian fruits was achieved at the age of 55 years. The maximum growth increment of camphor and durian trees were achieved at the age of 40 years. Based on NPV analysis and IRR, those three models were worthy of being cultivated. Financially, the combined rubber and durian cultivation (Model 3) was the most profitable, followed by monoculture rubber cultivation (Model 1), and lastly the combined rubber and camphor cultivation (Model 2).

Potential of Tropical Fruit Waste Biomass for Production of Bio-Briquette Fuel: Using Indonesia as an Example

Within developing countries, there is an appeal to use waste biomass for energy generation in the form of bio-briquettes. This study investigated the potential use of bio-briquettes that are produced from the waste biomass of the following tropical fruits: durian (Durio zibethinus), coconut (Cocos nucifera), coffee (Coffea arabica), cacao (Theobroma cacao), banana (Musa acuminata) and rambutan (Nephelium lappaceum). All fruit waste biomass samples exhibited an extremely high level of initial moisture content (78.22% in average). Fruit samples with the highest proportion of fruit waste biomass (of total unprocessed fruit mass) were represented by cacao (83.82%), durian (62.56%) and coconut (56.83%). Highest energy potentials (calorific value) of fruit waste biomass were observed in case of coconut (18.22 MJ∙kg−1), banana (17.79 MJ∙kg−1) and durian (17.60 MJ∙kg−1) fruit samples, whereas fruit waste biomass with the lowest level of ash content originated from the rambutan (3.67%), coconut (4.52%), and durian (5.05%) fruit samples. When investigating the energy demands to produce bio-briquettes from such feedstock materials, the best results (lowest amount of required deformation energy in combination with highest level of bio-briquette bulk density) were achieved by the rambutan, durian and banana fruit waste biomass samples. Finally, all investigated bio-briquette samples presented satisfactory levels of bulk density (&gt;1050 kg∙m−3). In conclusion, our results indicated the practicability and viability of such bio-briquette fuel production, as well as supporting the fact that bio-briquettes from tropical fruit waste biomass can offer a potentially attractive energy source with many benefits, especially in rural areas.

Nondestructive determination of total soluble solids in ‘Long-lab-lae’ durian fruits using near-infrared spectroscopy

Nondestructive determination of total soluble solids in ‘Long-lab-lae’ durian fruits using near-infrared spectroscopy

Codex standard for durians

Codex standard for durians

The draft genome of tropical fruit durian (Durio zibethinus)

The assembly of the durian genome provides insights into the unique flavor profile of this tropical fruit. Transcriptome and metabolome analyses show that methionine γ-lyase is upregulated and that volatile sulfur compounds are produced during ripening.

IDENTIFIKASI KANDUNGAN ZAT MAKANAN PADA BIJI BUAH DI PASAR BANDAR LAMPUNG

The purpose of this study was to determine the water content, protein, and fat in the avocado seed jackfruit and durian obtained from traditional markets in Bandar Lampung. Materials used in this research are the seeds of avocado, jackfruit seeds, and seeds of durian. The material obtained from the three traditional markets, namely Bandar Lampung Bambu Kuning, Markets Teluk, and Market Way Halim. This research was conducted using a survey method with the sampling design. Samples were taken three replications from each market using purposive random sampling. The results showed that: (1) the moisture content of 81.28% jackfruit seeds, avocado seed 60.16%, and 45.95% durian seeds (2) The lipid content of crude oil in the avocado seed 11: 40%, 10 durian seeds, 98%, and jackfruit seeds 10: 25% (3) the protein content in seeds 11.70% jackfruit, durian 6: 56% of fruit seeds, and avocado seed 6: 52%. Keywords: Avocado Seeds,Seeds of Jackfruit, Durian Fruit Seeds