Compatibility of utilising nitrogen-rich oil palm trunk sap for succinic acid fermentation by Actinobacillus succinogenes 130Z

Bukhari, Nurul Adela; Loh, Soh Kheang; Nasrin, Abu Bakar; Luthfi, Abdullah Amru Indera; Harun, Shuhaida; Abdul, Peer Mohamed; Jahim, Jamaliah Md

doi:10.1016/j.biortech.2019.122085

Cited by 22 publications

(18 citation statements)

References 35 publications

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“…In literature, it is postulated that sugar content increases from the outside to the inside and from the bottom to the top of the trunk this was confirmed by many studies 22,51 . On the other hand, quite many studies could not confirm this statement 24,52 . This might explain the high variation in sugar between different oil palms.…”

Section: Ingredients and Characteristics Of The Pressed Sap From Oil Palm Trunksmentioning

confidence: 96%

“…Fig. 3 summarizes a detailed comparison of studies based on a similar subdivision of the trunks and gives detailed information about the height of sugar determination 22,24,52 . This shows that different parts of the oil palm vary in concentrations of sugar.…”

Section: Ingredients and Characteristics Of The Pressed Sap From Oil Palm Trunksmentioning

confidence: 99%

“…The pH‐value is also an important parameter for further fermentation processes. In different studies the following pH‐values were determined for the pressed sap: 4.5, 25 5, 53 5.16, 24 7.49 67 . Komonkiat and Cheirsilp 25 assumed that the pH‐value is more acidic when microbial growth was initiated, while fresh sap is supposed to possess a neutral pH‐value.…”

Section: Ingredients and Characteristics Of The Pressed Sap From Oil Palm Trunksmentioning

confidence: 99%

“…Several studies have investigated the sugar and nutrient content in oil palm sap. 22,24,25 In the following, the results of these studies are compared to give an overview of the ingredients and characteristics of sap pressed from oil palm trunks.…”

Section: Introductionmentioning

confidence: 99%

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Pressed sap from oil palm (Elaeis guineensis) trunks: a revolutionary growth medium for the biotechnological industry?

Dirkes

Neubauer

Rabenhorst

2021

Biofuels Bioprod Bioref

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In recent decades, the demand for palm oil has constantly increased and with it the cultivation of oil palms. After a period of 25 years, the oil yield of the palm trees decreases and they are felled. The trees are cut into pieces and remain on the plantations. However, due to their high moisture and sugar content, fungi and molds cause problems for replanting. The use of the wood for the timber industry is difficult due to its structural characteristics. Biotechnological processes use microorganisms to produce relevant industrial products. The basis for each process is a culture medium that contains all necessary nutrients, especially carbohydrates. The culture medium makes up a high percentage of the costs, so alternative, cheaper substrates are preferred. In this review, we show and compare different analyses of the sap mechanically pressed from the oil palm trunk regarding its sugar and nutrient content. The total sugar concentration in the palm sap varies between 16.97–140 g L−1 and it is mainly composed of glucose, fructose, and sucrose. The comparison with common nutrient media and the results of fermentation processes already carried out on a laboratory scale show that palm sap offers great potential as a fermentation medium for biotechnological conversion into industrially relevant products. © 2021 The Authors Biofuels, Bioproducts and Biorefining published by Society of Chemical Industry and John Wiley & Sons, Ltd

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Section: Ingredients and Characteristics Of The Pressed Sap From Oil Palm Trunksmentioning

confidence: 96%

Section: Ingredients and Characteristics Of The Pressed Sap From Oil Palm Trunksmentioning

confidence: 99%

Section: Ingredients and Characteristics Of The Pressed Sap From Oil Palm Trunksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pressed sap from oil palm (Elaeis guineensis) trunks: a revolutionary growth medium for the biotechnological industry?

Dirkes

Neubauer

Rabenhorst

2021

Biofuels Bioprod Bioref

View full text Add to dashboard Cite

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“…The nitrogen sources that can be absorbed and utilized by microorganisms in the fermentation industry are usually expensive yeast extract and peptone [31]. Therefore, finding an inexpensive alternative nitrogen source is the primary method to reduce the cost of the medium [32]. We have tried to use the hydrolysate of mycobacterial cells instead of yeast extract to reduce the cost of nitrogen source [21], but the relatively complex process limits its large-scale application in industrial production.…”

Section: Introductionmentioning

confidence: 99%

Improving phytosterol biotransformation at low nitrogen levels by enhancing the methylcitrate cycle with transcriptional regulators PrpR and GlnR of Mycobacterium neoaurum

et al. 2020

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Background: Androstenedione (AD) is an important steroid medicine intermediate that is obtained via the degradation of phytosterols by mycobacteria. The production process of AD is mainly the degradation of the phytosterol aliphatic side chain, which is accompanied by the production of propionyl CoA. Excessive accumulation of intracellular propionyl-CoA produces a toxic effect in mycobacteria, which restricts the improvement of production efficiency. The 2-methylcitrate cycle pathway (MCC) plays a significant role in the detoxification of propionyl-CoA in bacterial. The effect of the MCC on phytosterol biotransformation in mycobacteria has not been elucidated in detail. Meanwhile, reducing fermentation cost has always been an important issue to be solved in the optimizing of the bioprocess. Results: There is a complete MCC in Mycobacterium neoaurum (MNR), prpC, prpD and prpB in the prp operon encode methylcitrate synthase, methylcitrate dehydratase and methylisocitrate lyase involved in MCC, and PrpR is a specific transcriptional activator of prp operon. After the overexpression of prpDCB and prpR in MNR, the significantly improved transcription levels of prpC, prpD and prpB were observed. The highest conversion ratios of AD obtained by MNR-prpDBC and MNR-prpR increased from 72.3 ± 2.5% to 82.2 ± 2.2% and 90.6 ± 2.6%, respectively. Through enhanced the PrpR of MNR, the in intracellular propionyl-CoA levels decreased by 43 ± 3%, and the cell viability improved by 22 ± 1% compared to MNR at 96 h. The nitrogen transcription regulator GlnR repressed prp operon transcription in a nitrogen-limited medium. The glnR deletion enhanced the transcription level of prpDBC and the biotransformation ability of MNR. MNR-prpR/ΔglnR was constructed by the overexpression of prpR in the glnR-deleted strain showed adaptability to low nitrogen. The highest AD conversion ratio by MNR-prpR/ΔglnR was 92.8 ± 2.7% at low nitrogen level, which was 1.4 times higher than that of MNR.

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Potential of polyhydroxyalkanoate and nanocellulose from oil palm trunk as raw materials for additive manufacturing: A review

et al. 2022

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Additive manufacturing (AM) is beneficial due to its fast prototyping, non‐complexity process, flexibility, which allows for a wide range of innovations. The AM presented in this review concentrated solely on the fused deposition modeling method. The application of polyhydroxyalkanoate (PHA) biopolymer in conjunction with AM technology in accordance with the interest of researchers in practicing sustainable development. Most studies discovered that the features of PHA, such as its brittleness, slow crystallization, and small processing window, may be overcome by blending it with other polymers. In particular, the physical and chemical properties of PHA have a strong influence on its printability in three‐dimensional printing. Furthermore, this article discussed the use of nanocellulose as a reinforcing material in PHA blends due to its high‐surface area, lightweight, and excellent biocompatibility. The limitations in creating and applying PHA were also highlighted, as it was expensive and difficult to process at high temperatures. Overall, this article provided an overview of AM, including the potential of oil palm trunk as a source of PHA and nanocellulose for bio‐composite products.

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Compatibility of utilising nitrogen-rich oil palm trunk sap for succinic acid fermentation by Actinobacillus succinogenes 130Z

Cited by 22 publications

References 35 publications

Pressed sap from oil palm (Elaeis guineensis) trunks: a revolutionary growth medium for the biotechnological industry?

Pressed sap from oil palm (Elaeis guineensis) trunks: a revolutionary growth medium for the biotechnological industry?

Improving phytosterol biotransformation at low nitrogen levels by enhancing the methylcitrate cycle with transcriptional regulators PrpR and GlnR of Mycobacterium neoaurum

Potential of polyhydroxyalkanoate and nanocellulose from oil palm trunk as raw materials for additive manufacturing: A review

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