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Volatile compounds and lactic acid bacteria in spontaneous fermented sourdough

Kam W, Wan Aida W, Sahilah A, Maskat M

Sains Malaysiana, 2011;40.

The aim of this study is to identify the predominating lactic acid bacteria (LAB) in a spontaneous fermented wheat sourdough. At the same time, an investigation towards volatile compounds that were produced was also carried out. Lactobacillus plantarum has been identified as the dominant species of lactobacilli with characters of a facultative heterofermentative strain. The generated volatile compounds that were produced during spontaneous fermentation were isolated by solvent extraction method, analysed by gas chromatography (GC), and identified by mass spectrophotometer (MS). Butyric acid has been found to be the main volatile compound with relative abundance of 6.75% and acetic acid at relative abundance of 3.60%. Esters that were formed at relatively low amount were butyl formate (1.23%) and cis 3 hexenyl propionate (0.05%). Butanol was also found at low amount with relative abundance of 0.60%. The carbohydrate metabolism of Lactobacillus plantarum may contributed to the production of acetic acid in this study via further catabolism activity on lactic acid that was produced. However, butyric acid was not the major product via fermentation by LAB but mostly carried out by the genus Clostridium via carbohydrate metabolism which needs further investigation

Matched MeSH terms: 1-Butanol
Vasorelaxant effect of water fraction of Labisia Pumila and its mechanisms in spontaneously hypertensive rats aortic ring preparation

Manshor NM, Razali N, Jusoh RR, Asmawi MZ, Mohamed N, Zainol S, et al.

Int J Cardiol Hypertens, 2020 Mar;4:100024.
PMID: 33447753 DOI: 10.1016/j.ijchy.2020.100024

Introduction: Labisia pumila has been reported to possess activities including antioxidant, anti-aging and anti-cancer but there is no report on its vasorelaxant effects.
Objective: This study aims to fractionate water extract of Labisia pumila, identify the compound(s) involved and elucidate the possible mechanism(s) of its vasorelaxant effects.
Methods: Water extract of Labisia pumila was subjected to liquid-liquid extraction to obtain ethyl acetate, n-butanol and water fractions. In SHR aortic ring preparations, water fraction (WF-LPWE) was established as the most potent fraction for vasorelaxation. The pharmacological mechanisms of the vasorelaxant effect of WF-LPWE were investigated with and without the presence of various inhibitors. The cumulative dose-response curves of potassium chloride (KCl)-induced contractions were conducted to study the possible mechanisms of WF-LPWE in reducing vasoconstriction.
Results: WF-LPWE produced dose-dependent vasorelaxant effect in endothelium-denuded aortic ring and showed non-competitive inhibition of dose-response curves of PE-induced contraction, and at its higher concentrations reduced KCl-induced contraction. 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ) significantly inhibited vasorelaxant effect of WF-LPWE. WF-LPWE significantly reduced the release of intracellular calcium ion (Ca2+) from the intracellular stores and suppressed the calcium chloride (CaCal2)-induced contraction. Nω-nitro-L-arginine methyl ester (L-NAME), methylene blue, indomethacin and atropine did not influence the vasorelaxant effects of WF-LPWE.
Conclusion: WF-LPWE exerts its vasorelaxant effect independently of endothelium and possibly by inhibiting the release of calcium from intracellular calcium stores, receptor-operated calcium channels and formation of inositol 1,4,5- triphosphate. WF-LPWE vasorelaxant effect may also mediated via nitric oxide-independent direct involvement of soluble guanylate cyclase (sGC)/ cyclic guanosine monophosphate (cGMP) pathways.

Matched MeSH terms: 1-Butanol
Utilization of red mud waste into mesoporous ZSM-5 for methylene blue adsorption-desorption studies

Tehubijuluw H, Subagyo R, Yulita MF, Nugraha RE, Kusumawati Y, Bahruji H, et al.

Environ Sci Pollut Res Int, 2021 Mar 13.
PMID: 33712959 DOI: 10.1007/s11356-021-13285-y

Red mud as industrial waste from bauxite was utilized as a precursor for the synthesis of mesoporous ZSM-5. A high concentration of iron oxide in red mud was successfully removed using alkali fusion treatment. Mesoporous ZSM-5 was synthesized using cetyltrimethylammonium bromide (CTABr) as a template via dual-hydrothermal method, and the effect of crystallization time was investigated towards the formation of mesopores. Characterization using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), N2 adsorption-desorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) indicated the formation of cubic crystallite ZSM-5 with high surface area and mesopore volume within 6 h of crystallization. Increasing the crystallization time revealed the evolution of highly crystalline ZSM-5; however, the surface area and mesoporosity were significantly reduced. The effect of mesoporosity was investigated on the adsorption of methylene blue (MB). Kinetic and thermodynamic analysis of MB adsorption on mesoporous ZSM-5 was carried out at a variation of adsorption parameters such as the concentration of MB solution, the temperatures of solution, and the amount of adsorbent. Finally, methanol, 1-butanol, acetone, hydrochloric acid (HCl), and acetonitrile were used as desorbing agents to investigate the reusability and stability of mesoporous ZSM-5 as an adsorbent for MB removal.

Matched MeSH terms: 1-Butanol
Solvent fermentation from Palm Oil Mill Effluent using Clostridium acetobutylicum in oscillatory flow bioreactor

Takriff M, Masngut N, Kadhum A, Kalil M, Mohammad A

Sains Malaysiana, 2009;38.

Acetone-butanol-ethanol (ABE) fermentation from Palm Oil Mill Effluent (POME) by C. acetobutylicum NCIMB 13357 in an oscillatory flow bioreactor was investigated. Experimental works were conducted in a U-shaped stainless steel oscillatory flow bioreactor at oscillation frequency between 0.45-0.78 Hz and a constant amplitude of 12.5 mm. Fermentations were carried out for 72 hr at 35oC using palm oil mill effluent and reinforced clostridia medium as a growth medium in batch culture. Result of this investigation showed that POME is a viable media for ABE fermentation and oscillatory flow bioreactor has an excellent potential as an alternative fermentation device.

Matched MeSH terms: 1-Butanol
Saccharification of polysaccharide content of palm kernel cake using enzymatic catalysis for production of biobutanol in acetone-butanol-ethanol fermentation

Shukor H, Abdeshahian P, Al-Shorgani NK, Hamid AA, Rahman NA, Kalil MS

Bioresour Technol, 2016 Feb;202:206-13.
PMID: 26710346 DOI: 10.1016/j.biortech.2015.11.078

In this work, hydrolysis of cellulose and hemicellulose content of palm kernel cake (PKC) by different types of hydrolytic enzymes was studied to evaluate monomeric sugars released for production of biobutanol by Clostridium saccharoperbutylacetonicum N1-4 (ATCC 13564) in acetone-butanol-ethanol (ABE) fermentation. Experimental results revealed that when PKC was hydrolyzed by mixed β-glucosidase, cellulase and mannanase, a total simple sugars of 87.81±4.78 g/L were produced, which resulted in 3.75±0.18 g/L butanol and 6.44±0.43 g/L ABE at 168 h fermentation. In order to increase saccharolytic efficiency of enzymatic treatment, PKC was pretreated by liquid hot water before performing enzymatic hydrolysis. Test results showed that total reducing sugars were enhanced to 97.81±1.29 g/L with elevated production of butanol and ABE up to 4.15±1.18 and 7.12±2.06 g/L, respectively which represented an A:B:E ratio of 7:11:1.

Matched MeSH terms: 1-Butanol
Production of Acetone-Butanol-Ethanol and Hydrogen of Palm Oil Mill Effluent Anaerobic Fermentation with Clostridium Acetobutylicum NCIMB 13357

Pang WK, Wan Mohtar Wan Yusoff, Mohd Sahaid Kalil, Osman Hassan

Sains Malaysiana, 2004;33.

Palm oil mill effluent (POME) can be utilised directly as the sole substrate in the anaerobic fermentation of acetone-butanol-ethanol (ABE) and hydrogen by Clostridium acetobutylicum NClMB13357 in a submerged batch system. Effects of sedimented POME concentration and the initial culture pH on the production of ABE/H were studied. Sedimented POME with 90% v/v (POME90) at pH 5.8 is capable of producing 4.01 g/L ABE with acetone concentration at 1.97 g/L; butanol 1.74 g/L and ethanol 0.3 g/L. The highest concentration of butanol (1.86 g/L) was produced from a culture with initial pH 6.0. The production of hydrogen gas was proportioned to the concentration of POME. The highest hydrogen gas production was at pH 5.5 (31 mL). More than 50% (v/v) of hydrogen gas was produced at different pH except pH 4.5, when only 16% (v/v) or 5 mL of hydrogen was produced.

Matched MeSH terms: 1-Butanol
Fulltext Perilla frutescens Leaf Extract and Fractions: Polyphenol Composition, Antioxidant, Enzymes (α-Glucosidase, Acetylcholinesterase, and Tyrosinase) Inhibitory, Anticancer, and Antidiabetic Activities

Wang Z, Tu Z, Xie X, Cui H, Kong KW, Zhang L

Foods, 2021 Feb 03;10(2).
PMID: 33546380 DOI: 10.3390/foods10020315

This study aims to evaluate the bioactive components, in vitro bioactivities, and in vivo hypoglycemic effect of P. frutescens leaf, which is a traditional medicine-food homology plant. P. frutescens methanol crude extract and its fractions (petroleum ether, chloroform, ethyl acetate, n-butanol fractions, and aqueous phase residue) were prepared by ultrasound-enzyme assisted extraction and liquid-liquid extraction. Among the samples, the ethyl acetate fraction possessed the high total phenolic (440.48 μg GAE/mg DE) and flavonoid content (455.22 μg RE/mg DE), the best antioxidant activity (the DPPH radical, ABTS radical, and superoxide anion scavenging activity, and ferric reducing antioxidant power were 1.71, 1.14, 2.40, 1.29, and 2.4 times higher than that of control Vc, respectively), the most powerful α-glucosidase inhibitory ability with the IC50 value of 190.03 μg/mL which was 2.2-folds higher than control acarbose, the strongest proliferative inhibitory ability against MCF-7 and HepG2 cell with the IC50 values of 37.92 and 13.43 μg/mL, which were considerable with control cisplatin, as well as certain inhibition abilities on acetylcholinesterase and tyrosinase. HPLC analysis showed that the luteolin, rosmarinic acid, rutin, and catechin were the dominant components of the ethyl acetate fraction. Animal experiments further demonstrated that the ethyl acetate fraction could significantly decrease the serum glucose level, food, and water intake of streptozotocin-induced diabetic SD rats, increase the body weight, modulate their serum levels of TC, TG, HDL-C, and LDL-C, improve the histopathology and glycogen accumulation in liver and intestinal tissue. Taken together, P. frutescens leaf exhibits excellent hypoglycemic activity in vitro and in vivo, and could be exploited as a source of natural antidiabetic agent.

Matched MeSH terms: 1-Butanol
Mechanisms underlying the antihypertensive effect of Alstonia scholaris

Bello I, Usman NS, Mahmud R, Asmawi MZ

J Ethnopharmacol, 2015 Dec 4;175:422-31.
PMID: 26429073 DOI: 10.1016/j.jep.2015.09.031

Alstonia scholaris has a long history of use in the Ayurveda traditional treatment of various ailments including hypertension. We have reported the blood pressure lowering activity of the extract of A. scholaris. The following research aim to delineate the pharmacological mechanism involve in the antihypertensive action.

Matched MeSH terms: 1-Butanol/chemistry
Fulltext Isolation of Antidiabetic Withanolides from Withania coagulans Dunal and Their In Vitro and In Silico Validation

Maher S, Choudhary MI, Saleem F, Rasheed S, Waheed I, Halim SA, et al.

Biology (Basel), 2020 Jul 30;9(8).
PMID: 32751610 DOI: 10.3390/biology9080197

Withania coagulans (W. coagulans) is well-known in herbal medicinal systems for its high biological potential. Different parts of the plant are used against insomnia, liver complications, asthma, and biliousness, as well as it is reported to be sedative, emetic, diuretic, antidiabetic antimicrobial, anti-inflammatory, antitumor, hepatoprotective, antihyperglycemic, cardiovascular, immuno-suppressive and central nervous system depressant. Withanolides present in W. coagulans have attracted an immense interest in the scientific field due to their diverse therapeutic applications. The current study deals with chemical and biological evaluation of chloroform, and n-butanol fractions of W. coagulans. The activity-guided fractionation of both extracts via multiple chromatographic steps and structure elucidation of pure isolates using spectroscopies (NMR, mass spectrometry, FTIR and UV-Vis) led to the identification of a new withanolide glycoside, withacogulanoside-B (1) from n-butanol extract and five known withanolides from chloroform extract [withanolid J (2), coagulin E (3), withaperuvin C (4), 27-hydroxywithanolide I (5), and ajugin E (6)]. Among the tested compounds, compound 5 was the most potent α-glucosidase inhibitor with IC50 = 66.7 ± 3.6 µM, followed by compound 4 (IC50: 407 ± 4.5 µM) and compound 2 (IC50: 683 ± 0.94 µM), while no antiglycation activity was observed with the six isolated compounds. Molecular docking was used to predict the binding potential and binding site interactions of these compounds as α-glucosidase inhibitors. Consequently, this study provides basis to discover specific antidiabetic compounds from W. coagulans.

Matched MeSH terms: 1-Butanol
Isolation and structure elucidation of triterpenes from inflorescence of banana (Musa balbisiana cv. Saba)

Tin, H.S., Padam, B.S., Abdullah, M.I., Chye, F.Y.

International Food Research Journal, 2016;23(2):866-872.
MyJurnal

The study aimed to isolate and elucidate the chemical compounds that are found in banana
(Musa balbisiana cv. Saba) inflorescences. Banana inflorescence buds were extracted using
methanol and the resulted methanolic extract was partitioned using chloroform, ethyl acetate
and butanol against deionized water. The chloroform partition was further separated into
fractions using column chromatography assisted by thin layer chromatography. The structure
elucidation was performed using nuclear magnetic resonance spectrometry (NMR). Three
triterpenes were isolated namely 31-norcyclolaudenone (1), cycloartenol (2) and (24R)-4a,24-
trimethyl-5a-cholesta-8,25(27)-dien-3b-ol (3). This is the first report on the isolation of these
triterpenes from Musa balbisiana inflorescence. The discovery of new triterpenes from banana
inflorescence should be further explored to open a new perspective that banana by-products
might serve as new source of natural products for food and pharmaceutical applications.

Matched MeSH terms: 1-Butanol
Improvement of the butanol production selectivity and butanol to acetone ratio (B:A) by addition of electron carriers in the batch culture of a new local isolate of Clostridium acetobutylicum YM1

Nasser Al-Shorgani NK, Kalil MS, Wan Yusoff WM, Shukor H, Hamid AA

Anaerobe, 2015 Dec;36:65-72.
PMID: 26439644 DOI: 10.1016/j.anaerobe.2015.09.008

Improvement in the butanol production selectivity or enhanced butanol:acetone ratio (B:A) is desirable in acetone-butanol-ethanol (ABE) fermentation by Clostridium strains. In this study, artificial electron carriers were added to the fermentation medium of a new isolate of Clostridium acetobutylicum YM1 in order to improve the butanol yield and B:A ratio. The results revealed that medium supplementation with electron carriers changed the metabolism flux of electron and carbon in ABE fermentation by YM1. A decrease in acetone production, which subsequently improved the B:A ratio, was observed. Further improvement in the butanol production and B:A ratios were obtained when the fermentation medium was supplemented with butyric acid. The maximum butanol production (18.20 ± 1.38 g/L) was gained when a combination of methyl red and butyric acid was added. Although the addition of benzyl viologen (0.1 mM) and butyric acid resulted in high a B:A ratio of 16:1 (800% increment compared with the conventional 2:1 ratio), the addition of benzyl viologen to the culture after 4 h resulted in the production of 18.05 g/L butanol. Manipulating the metabolic flux to butanol through the addition of electron carriers could become an alternative strategy to achieve higher butanol productivity and improve the B:A ratio.

Matched MeSH terms: 1-Butanol
Fulltext Impact of pH and butyric acid on butanol production during batch fermentation using a new local isolate of Clostridium acetobutylicum YM1

Al-Shorgani NKN, Kalil MS, Yusoff WMW, Hamid AA

Saudi J Biol Sci, 2018 Feb;25(2):339-348.
PMID: 29472788 DOI: 10.1016/j.sjbs.2017.03.020

The effect of pH and butyric acid supplementation on the production of butanol by a new local isolate of Clostridium acetobutylicum YM1 during batch culture fermentation was investigated. The results showed that pH had a significant effect on bacterial growth and butanol yield and productivity. The optimal initial pH that maximized butanol production was pH 6.0 ± 0.2. Controlled pH was found to be unsuitable for butanol production in strain YM1, while the uncontrolled pH condition with an initial pH of 6.0 ± 0.2 was suitable for bacterial growth, butanol yield and productivity. The maximum butanol concentration of 13.5 ± 1.42 g/L was obtained from cultures grown under the uncontrolled pH condition, resulting in a butanol yield (YP/
S
) and productivity of 0.27 g/g and 0.188 g/L h, respectively. Supplementation of the pH-controlled cultures with 4.0 g/L butyric acid did not improve butanol production; however, supplementation of the uncontrolled pH cultures resulted in high butanol concentrations, yield and productivity (16.50 ± 0.8 g/L, 0.345 g/g and 0.163 g/L h, respectively). pH influenced the activity of NADH-dependent butanol dehydrogenase, with the highest activity obtained under the uncontrolled pH condition. This study revealed that pH is a very important factor in butanol fermentation by C. acetobutylicum YM1.

Matched MeSH terms: 1-Butanol
Impact of Eucalyptus maculata Hook resin exudate constituents on reducing COX-2 gene expression: In-vivo anti-inflammatory, molecular docking and dynamics studies

Sabry MM, Abdel-Rahman RF, Fayed HM, Taher AT, Ogaly HA, Albohy A, et al.

J Ethnopharmacol, 2023 Oct 05;314:116631.
PMID: 37172920 DOI: 10.1016/j.jep.2023.116631

ETHNOPHARMACOLOGICAL RELEVANCE: Eucalyptus maculata Hook from the Myrtaceae family is a native Australian plant that is frequently cultivated in Egypt. Many Eucalyptus species, including E. maculata, were widely used by the Dharawal, the indigenous Australian people, for their anti-inflammatory properties.
AIM OF THE STUDY: The purpose of this study was to determine the anti-inflammatory activity of the ethanol extract of E. maculata resin exudate, its methylene chloride and n-butanol fractions, as well as the isolated compounds.
MATERIALS AND METHODS: the ethanol extract was partitioned by methylene chloride, and n-butanol saturated with water. The fractions were chromatographed to isolate pure compounds. In-vivo anti-inflammatory activity of the ethanol extract, the fractions at a dose of 200 mg/kg, and the isolated compounds (20 mg/kg) was estimated using carrageenan-induced rat paws edema method against indomethacin (20 mg/kg). The activity was supported by histopathological and biochemical parameters.
RESULTS: Three isolated compounds were identified as aromadendrin (C1), 7-O-methyl aromadendrin (C2), and naringenin (C3). Our findings demonstrated that the tested fractions significantly reduced the paw edema starting from the 3rd to the 5th hour as compared to the positive control, compounds C2 and C3 showed the greatest significant reduction in paw edema. The ethanol extract, fractions, C2, and C3 demonstrated an anti-inflammatory potential through reducing the levels of TNF-α, IL-6, and PGE2, as well as COX-2 protein expression compared to the negative control. These results were supported by molecular docking, which revealed that the isolated compounds had high affinity to target COX-1 and COX-2 active sites with docking scores ranging from -7.3 to -9.6 kcal mol-1 when compared to ibubrofen (-7.8 and -7.4 kcal mol-1, respectively). Molecular dynamics simulations were also performed and confirmed the docking results.
CONCLUSION: The results supported the traditional anti-inflammatory potency of E. maculata Hook, and the biochemical mechanisms underlying this activity were highlighted, opening up new paths for the development of potent herbal anti-inflammatory medicine. Finally, our findings revealed that E. maculata resin constituents could be considered as promising anti-inflammatory drug candidates.

Matched MeSH terms: 1-Butanol
Esterification of levulinic acid to levulinate esters in the presence of sulfated silica catalyst

Nur Aainaa Syahirah Ramli, Nur Irsalina Hisham, Nor Aishah Saidina Amin

Sains Malaysiana, 2018;47:1131-1138.

Levulinic acid (LA) is one of biomass derived building block chemicals with various applications. Catalytic esterification
of LA with alkyl alcohol produces levulinate ester which can be applied as fragrance, flavouring agents, as well as fuel
additives. In this study, a series of sulfated silica (SiO2
) catalyst was prepared by modification of SiO2
with sulfuric acid
(H2
SO4
) at different concentrations; 0.5 M to 5 M H2
SO4
. The catalysts were characterized, and tested for esterification
of LA with ethanol to ethyl levulinate (EL). The effect of various reaction parameters including reaction time, catalyst
loading and molar ratio of LA to ethanol on esterification of LA to EL were inspected. The catalyst with high concentration
of acid sites seemed suitable for LA esterification to EL. Among the sulfated SiO2
catalysts tested (0.5 M-SiO2
, 1 M-SiO2
,
3 M-SiO2
and 5 M-SiO2
), 3 M-SiO2
exhibited the highest performance with the optimum EL yield of 54% for reaction
conducted at reflux temperature for 4 h, 30% 3 M-SiO2
loading and LA to ethanol molar ratio of 1:20. Besides, the
reusability of 3 M-SiO2
catalyst for LA esterification with ethanol was examined for five cycles. Esterification of LA with
methanol and 1-butanol were also carried out for methyl levulinate (ML) and butyl levulinate (BL) productions with 69%
and 40% of ML and BL yields, respectively. This study demonstrates the potential of sulfated SiO2
catalyst for levulinate
ester production from LA at mild process condition.

Matched MeSH terms: 1-Butanol
Enantioseparation of (R,S)-ketoprofen using Candida antarctica lipase B in an enzymatic membrane reactor

Ong AL, Kamaruddin AH, Bhatia S, Aboul-Enein HY

J Sep Sci, 2008 Jul;31(13):2476-85.
PMID: 18646277 DOI: 10.1002/jssc.200800086

An enzymatic membrane reactor (EMR) for enantioseparation of (R,S)-ketoprofen via Candida antarctica lipase B (CALB) as biocatalyst was investigated. A comparative study of free and immobilized CALB was further conducted. The catalytic behaviour of CALB in an EMR was affected by the process parameters of enzyme load, substrate concentration, substrate molar ratio, lipase solution pH, reaction temperature, and substrate flow rate. Immobilization of CALB in the EMR was able to reduce the amount of enzyme required for the enantioseparation of (R,S)-ketoprofen. Immobilized CALB in the EMR assured higher reaction capacity, better thermal stability, and reusability. It was also found to be more cost effective and practical than free CALB in a batch reactor.

Matched MeSH terms: 1-Butanol
Fulltext Efficacy of selected purification techniques for bromelain

Nadzirah, K.Z., Zainal, S., Noriham, A., Normah, I.

International Food Research Journal, 2013;20(1):43-46.
MyJurnal

Bromelain is one of the vegetal proteases found in pineapple plant. It has numerous applications in food and pharmaceuticals. This review discussed different bromelain purification techniques which will assist in determining the effect of processing conditions on the purification efficacy. There are four purification techniques to be discussed, namely; reverse micellar system, aqueous two phase extraction, cation exchange chromatography and ammonium sulphate precipitation. Of the four techniques, cation exchange chromatography had shown the best bromelain purification technique with purification fold of 10.0 followed by reverse micellar system containing CTAB/ isooctane/ hexanol/ butanol, ATPE containing PEG polymer, ammonium sulphate precipitation and ATPE containing PEO-PPO-PEO with purification fold of 5.2, 4.0, 2.81 and 1.25, respectively.

Matched MeSH terms: 1-Butanol
Fulltext Effect of nutritional factors on the growth and production of biosurfactant by Pseudomonas aeruginosa strain 181

Al-Araji, L., Rahman, R.N.Z.A., Basri, M., Salleh, A.B.

ASM Science Journal, 2008;2(1):45-56.
MyJurnal

The growth and production of biosurfactant by P. seudomonas aeruginosa (181) was dependant on nutritional factors. Among the eleven carbon sources tested, glucose supported the maximum growth (0.25 g/L) with the highest biosurfactant yield and this was followed by glycerol. Glucose reduced the surface tension to 35.3 dyne/cm and gave an E24 reading of 62.7%. Butanol gave the lowest growth and had no biosurfactant production. For the nitrogen sources tested, casamino acid supported a growth of 0.21 g/L which reduced the surface tension to 41.1 dyne/cm and gave an E24 reading of 56%. Soytone was assimilated similarly, with good growth and high biosurfactant production. Corn steep liquor gave the lowest growth and did not show any biosurfactant activity.

Matched MeSH terms: 1-Butanol
Fulltext Determination of the Major Component of Water Fraction of Katuk (Sauropus androgynous (L.) Merr.) Leaves by Liquid Chromatography-Mass Spectrometry

Mustarichie R, Salsabila T, Iskandar Y

J Pharm Bioallied Sci, 2019 Dec;11(Suppl 4):S611-S618.
PMID: 32148372 DOI: 10.4103/jpbs.JPBS_205_19

Background: The katuk leaf (Sauropus androgynous (L.) Merr.) is one of the plants that are used to overcome baldness by the people of Kampung Mak Kemas, Malaysia. It is suspected that secondary metabolites contained in katuk leaves play a key role in stimulating hair growth.
Aims and Objectives: The aim of this study was to identify the optimum method to obtain one of the chemical compounds in the water fraction and to identify the hypothesized chemical isolates in the water fraction katuk leave's ethanol extract.
Materials and Methods: The methods used in this study included the collection and determination of the katuk plant, the processing of the katuk, phytochemical filtrating, extracting with ethanol 96%, and fractionation using the liquid-liquid extraction method with n-hexane, ethyl acetate, and water solvents The water fraction of katuk leaves was analyzed by its components by thin-layer chromatography using the stationary phase of silica gel 60 F254, developer of n-butanol:acetic acid:water (4:1:5), and detection under ultraviolet (UV) light at a wavelength of 366 and 254nm, as well as with vanillin-sulfuric acid reagent. To isolate the compounds from water fraction of katuk leaves, it was then eluted with a vacuum column chromatography by eluent with a level polarity that would get 11 subfractions. Each subfraction was checked by two-dimensional thin-layer chromatography to see subfraction purity characterized by the appearance of a spot on the chromatogram plate. The isolate was analyzed using spot test, ultraviolet-visible spectrophotometer, infrared spectrophotometer, and liquid chromatography-mass spectrometry.
Results: The isolate was an alkaloid compound with a molecular mass of 406.3131 m/z with the molecular formula C21H39N6O2 as S, S-5, 5'-amino-4,4'-dihexyl-propyldihydropyrazol-3, 3-one.
Conclusion: One of the chemical compounds contained in the water fraction of the ethanol extract of the katuk leaf was an alkaloid group.

Matched MeSH terms: 1-Butanol
Determination of diffusion coefficients and activation energy of selected organic liquids using reversed-flow gas chromatographic technique

Khalisanni Khalid, Rashid Atta Khan, Sharifuddin Mohd. Zain

Sains Malaysiana, 2012;41:1109-1116.

Evaporation of vaporize organic liquid has ecological consequences when the compounds are introduced into both freshwater and marine environments through industrial effluents, or introduced directly into the air from industrial unit processes such as bioreactors and cooling towers. In such cases, a rapid and simple method are needed to measure physicochemical properties of the organic liquids. The Reversed-Flow Gas Chromatography (RF-GC) sampling technique is an easy, fast and accurate procedure. It was used to measure the diffusion coefficients of vapors from liquid into a carrier gas and at the same time to determine the rate coefficients for the evaporation of the respective liquid. The mathematical expression describing the elution curves of the samples peaks was derived and used to calculate the respective parameters for the selected liquid pollutants selected such as methanol, ethanol, 1-propanol, 1-butanol, n-pentane, n-hexane, n-heptane and n-hexadecane, evaporating into the carrier gas of nitrogen. The values of diffusion coefficients found were compared
with those calculated theoretically or reported in the literature. The values of evaporation rate were used to determine the activation energy of respective samples using Arrhenius equation. An interesting finding of this work is by using an alternative mathematical analysis based on equilibrium at the liquid-gas interphase, the comparison leads to profound
agreement between theoretical values of diffusion coefficients and experimental evidence.

Matched MeSH terms: 1-Butanol
Fulltext Continuous Butanol Fermentation of Dilute Acid-Pretreated De-oiled Rice Bran by Clostridium acetobutylicum YM1

Al-Shorgani NKN, Al-Tabib AI, Kadier A, Zanil MF, Lee KM, Kalil MS

Sci Rep, 2019 03 15;9(1):4622.
PMID: 30874578 DOI: 10.1038/s41598-019-40840-y

Continuous fermentation of dilute acid-pretreated de-oiled rice bran (DRB) to butanol by the Clostridium acetobutylicum YM1 strain was investigated. Pretreatment of DRB with dilute sulfuric acid (1%) resulted in the production of 42.12 g/L total sugars, including 25.57 g/L glucose, 15.1 g/L xylose and 1.46 g/L cellobiose. Pretreated-DRB (SADRB) was used as a fermentation medium at various dilution rates, and a dilution rate of 0.02 h-1 was optimal for solvent production, in which 11.18 g/L of total solvent was produced (acetone 4.37 g/L, butanol 5.89 g/L and ethanol 0.92 g/L). Detoxification of SADRB with activated charcoal resulted in the high removal of fermentation inhibitory compounds. Fermentation of detoxified-SADRB in continuous fermentation with a dilution rate of 0.02 h-1 achieved higher concentrations of solvent (12.42 g/L) and butanol (6.87 g/L), respectively, with a solvent productivity of 0.248 g/L.h. This study showed that the solvent concentration and productivity in continuous fermentation from SADRB was higher than that obtained from batch culture fermentation. This study also provides an economic assessment for butanol production in continuous fermentation process from DRB to validate the commercial viability of this process.

Matched MeSH terms: 1-Butanol

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