Oxidative stress has been postulated to play a role in several diseases, including cardiovascular diseases, diabetes, and stress-related disorders (anxiety/depression). Presently, natural plant-derived phytochemicals are an important tool in reducing metabolomic disorders or for avoiding the side effects of current medicinal therapies. Brown Rice (Oryza sativa L.) is an important part of Asian diets reported as a rich source of bioactive phytonutrients.
1. Introduction
Oxidative stress is a condition that is caused by an imbalance between antioxidants and free radicals of living organisms. This imbalance occurs due to the excessive production of reactive oxygen species (ROS) or antioxidant deficiency that leads to the damage of aerobic organisms as well as chronic inflammation; referred to as oxidative stress
[1]. Lower ROS concentration is important for normal cellular signalling, while excess ROS can cause oxidative damage to DNA, lipids, proteins, and is associated with several chronic diseases
[2][3][2,3]. The current definition of oxidative stress includes metabolic stress-related pathways that participate in both cellular and extracellular metabolic events. The biology of oxidative stress is extremely complex, with multiple mechanisms at work
[4]. Regardless of the mechanism, oxidative stress causes the onset of many diseases including cardiovascular diseases, diabetes, and anxiety or depression which are considered a major public health issue worldwide. As a result, consuming antioxidants to prevent oxidative stress is becoming important for health. Moreover, an increase in the health-consciousness of consumers has increased the demand for nutritional and disease-preventing functional foods, probiotics, prebiotics, and postbiotics. Numerous studies have focused on probiotics, specifically
lactobacilli strains, that have the potential to act as antioxidants to protect the host from oxidative stress
[5]. Some
lactobacilli strains have been found to quench oxygen free radicals using a chemical antioxidant method.
Many studies have been reported that phytochemicals (e.g., polyphenols and phenolic acids) derived from natural plants have the potential to target oxidative stress and inflammatory pathways
[6][7][6,7]. Rice is a staple food (in many countries) that belongs to the grass family (
Oryza sativa). The total worldwide production of rice was about 769,657,791 tonnes in an area of 167,249,103 ha. Epidemiological studies have shown that the low incidence of chronic diseases in rice-consuming regions can be correlated with rice antioxidants
[8][9][8,9]. The antioxidant activity and phytochemical content of brown rice (BR) have been recorded in several studies. Components such as γ-oryzanol, phenolic acids, gamma-aminobutyric acid (GABA), flavonoids, and γ-tocotrienol contribute to the health-promoting properties of brown rice
[10].
Evidence supports the effect of solid-state fermentation (SSF) techniques using lactic acid bacteria (LABs) and fungal strains on antioxidant levels and bioactive properties in a variety of substrates, including barley
[11], pearl millet
[12], and rice
[2]. Many researchers, food scientists, and industrialists use the SSF process to enhance the nutritional quality of food and food products. Biological methods are environmentally friendly, relatively safe, and rely on the use of appropriate and specific microorganisms
[13]. Our study aimed to provide knowledge to quantify the quality of these phytochemical antioxidants in whole brown rice to meet the needs of food producers and consumers of rice: (1) to analyze the antioxidant properties of differently fermented brown (FBR) rice over raw brown rice (BR); (2) detection of bioactive compounds in raw BR and different LABs fermented brown rice using ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UHPLC-QTOF/MS), and (3) detection of cellular antioxidant activity of the best LAB fermenting bacterial strain (
L. reuteri FBR).
2. Untargeted Metabolomics Using UHPLC Q-TOF-MS/MS in Brown Rice Samples
UHPLC Q-TOF-MS/MS detection is considered a gold standard technique for the precise detection and quantification of a wide variety of components. Therefore, in this study, we have used this detection technique for the identification of phenolic compounds in brown rice.
2.1. Phenolic Compounds
In the present research, the phenolic compositions of BR treated with different fermentation bacteria were selected and positively or tentatively identified by UHPLCQ-TOF-MS/MS. Phenolic identification and characterization were achieved by comparing our results with mass spectral literature evidence and cross-referencing it with other available spectral databases, such as Metlin and Metabolomics Workbench. A total of 15 phenolic compounds were tentatively found from our soluble extracts of raw BR,
L. reuteri FBR,
L. fermentum FBR, and
L. plantarum FBR respectively, as shown in
Table 12. In the ethanol extract, we identified compounds 1 to 14 at different adduct charges [M − H]
− and [M − H]
+ which are identified by comparing with mass spectral libraries, XCMS online (Metlin), and Metabolomics Workbench. Heat map analysis was used for clustering phenolic compounds based on their concentrations (
Figure 1) where the colour scheme from blue to red shows concentration in decreasing order.
Figure 1. Heat map showing levels of phenolic compounds in raw and LABs fermented BR samples.
Table 12. Phenolic compounds detected in raw and LABs fermented BR.
S. No |
Sample Name |
Retention Time (min) |
Peak Area |
Adduct/Charge |
Precursor Mass |
Found at Mass |
Molecular Formula |
Tentative Phenolic Compound |
1 |
Raw BR |
Nd |
Nd |
[18][32], and vanillic acid
[19][33] are already reported in the literature for their strong antioxidant capacities.
2.2. Levels of Amino Acid in Brown Rice
In the growth and development of organisms, amino acids play an important role and can also improve the taste of food. In our present study, a total of 18 amino acids were detected in raw and differently fermented BR samples (
Figure 2 and
Table 23) which shows statistically significant differences from each other after comparing their levels. Raw BR contained the least number of amino acids, which may be due to more bound molecules with the parent, whereas fermentation leads to an increase in amino acid content. The levels of amino acids were detected highest in the
L. reuteri FBR sample which might be strain-specific as fermentation microorganisms produce enzymes that lead to the formation of several metabolites and bioactive compounds from the food matrix
[20][34]. In the ethanol extract, we found levels of some essential amino acids (tryptophan, lysine, methionine, and histidine), as well as certain conditionally essential amino acids (arginine, ornithine, serine, and glutamine), increased drastically after fermentation (
Figure 2 and
Table 23). The identification was done by comparing with mass spectral libraries, XCMS online (Metlin) and Metabolomics Workbench. In amino acids,
L. reuteri FBR also shows the highest number of amino acids content as observed in phenolic compounds.
Figure 2. Heat map showing levels of amino acids in raw and different fermented BR samples.
Table 23. Amino acids detected in raw and LABs fermented brown rice.
S. No |
Sample Name |
Retention Time (Min) |
Peak Area |
Adduct/ Charge |
Precursor Mass |
Found at Mass |
Formula Finder Result |
Amino Acid |
Figure 3. Heat map showing levels of fatty acids in raw and different LABs fermented BR samples.
Table 34. Fatty acids detected in raw and LABs fermented brown rice.
S. No |
Sample Name |
Retention Time |
Peak Area |
Adduct/Charge |
Precursor Mass |
Found at Mass |
Formula Finder Result |
Fatty Acid |
[M − H]− |
Nd |
Nd |
1 |
Raw BR | C |
1.00 | 25 | H | 36 | O |
Beta-carotenol |
1.52 × 10 | 3 |
[M + H]+ |
156.077 |
156.077 |
C | 6 | H |
1 |
Raw BR | 9 | N | 3 | O | 2 |
Histidine |
39.97 |
1.91 × 102 |
[M − H]− |
L. plantarum FBR |
45.56 |
4.53 × 105 |
[M − H]− |
353.268 |
L. plantarum FBR |
1.00 |
7.31 × 10 | 353.187 |
255.234 |
255.2331 |
C | 5 |
[M + H]+ |
156.077 |
156.077 |
L. fermentum FBR |
Nd |
Nd |
[M − H]− |
Nd |
Nd |
16 | H | 32 | O | 2 |
Palmitic Acid |
L. fermentum FBR |
1.02 |
6.33 × 105 |
[M + H]+ |
156.077 |
156.0771 |
L. reuteri FBR |
45.45 |
5.19 × 10 |
L. plantarum FBR |
1.94 |
5.15 × 103 |
[M − H]− |
255.234 |
255.2331 |
5 |
[M − H]− |
353.268 |
353.284 |
2 |
Raw BR |
Nd |
Nd |
[M + H]+ |
Nd |
Nd |
C10H12O2 |
Eugenol |
L. plantarum FBR |
Nd |
Nd |
L. reuteri |
L. fermentum FBR |
28.03 |
4.28 × 103 |
[M − H]− |
255.234 |
255.2332 |
FBR |
1.02 |
7.45 × 105 |
[M + H]+ |
156.077 |
156.0771 |
L. reuteri FBR |
23.73 |
1.53 × 104 |
[M − H]− |
255.234 |
255.2332 |
2 |
2 | Raw BR |
Raw BR | ND |
NDND |
[M − H]− |
ND |
ND |
C6H14N2O2 |
ND |
[M + H]+ |
ND |
ND |
C5H10O2Lysine |
Valeric acid |
[M + H]+ |
Nd |
Nd |
L. plantarum FBR |
1.02 |
9.16 × 105 |
[M − H]− |
L. plantarum | 145.099 |
FBR |
ND |
ND |
[M + H]+ |
ND |
L. fermentum FBR |
Nd |
Nd |
[M + H]+ |
Nd |
Nd |
145.0982 |
L. fermentum FBR |
1.02 |
2.17 × 105 |
[M − H]− |
145.099 |
145.0984 |
ND |
ND |
L. reuteri FBR |
20.81 |
2.24 × 105 |
L. reuteri | [M + H]+ |
FBR | 179.107 |
179.1067 |
1.02 |
1.40 × 10 | 6 |
[M − H]− |
145.099 |
145.0983 |
L. reuteri FBR |
22.88 |
1.02 × 103 |
ND |
C |
11 |
H |
12 |
N |
2 |
O |
2 |
Tryptophan |
ND |
L. fermentum FBR |
ND |
ND |
[M + H]+ |
[M + H]+ |
185.066 |
185.0663 |
3 |
Raw BR |
33.80 |
2.20 × 105 |
[M − H]− |
293.177 |
293.1761 |
C |
3 |
Raw BR |
ND |
ND |
[M + H]+ |
ND | 17 | H26O4 |
6-Gingerol |
ND |
C | 5 | H | 11 | NO | 3 | S |
Methionine |
3 |
Raw BR |
46.24 |
5.29 × 103 |
[M − H]− |
279.234 |
279.2332 |
L. plantarum FBR |
33.80 |
2.08 × 106 |
[M − H]− |
293.177 |
293.176 |
C | 18 | H | 32 | O | 2 |
Linoleic Acid |
L. plantarum FBR |
1.17 |
L. plantarum FBR |
46.26 | 5.66 × 105 |
[M + H]+ |
166.053 |
6.56 × 10166.0536 |
5 |
[M − H]− |
279.234 |
279.2332 |
L. fermentum FBR |
33.81 |
2.03 × 106 |
[M − H]− |
293.177 |
293.1761 |
L. fermentum FBR |
1.17 |
5.33 × 105 |
[M + H]+ |
166.053 |
166.0537 |
L. reuteri FBR |
33.80 |
2.13 × 106 |
[M − H]− |
293.177 |
293.1762 |
L. reuteri FBR |
1.18 |
8.41 × 105 |
[M + H]+ |
166.053 |
166.0536 |
4 |
Raw BR |
Nd |
4 |
Raw BR | Nd |
[M + H]+ |
Nd |
1.17 |
2.56 × 10Nd |
2 | C15H10O4 |
Chrysin |
[M − H]− |
146.047 |
146.0457 |
C | 5 | H | 9 | NO |
L. fermentum FBR |
46.24 |
6.16 × 105 |
[M − H]− |
279.234 |
279.2334 |
L. reuteri FBR |
46.25 |
6.64 × 105 |
[M − H]− |
279.234 |
279.2334 |
4 |
4 | Glutamic acid |
Raw BR |
47.28 |
1.45 × 105 |
[M + H]+ |
271.264 |
271.2637 |
C17H34O2 |
L. plantarum FBR |
Nd |
Nd |
[M + H]+ |
Nd |
Nd |
Heptadecanoic acid |
L. plantarum FBR |
1.47 |
3.18 × 105 |
[M − H]− |
146.047 |
146.046 |
L. plantarum FBR |
47.28 |
1.44 × 106 |
L. fermentum FBR |
14.78 |
4.09 × 105 |
[M + H]+ |
253.052 |
253.0524 |
[M + H]+ |
271.264 |
L. fermentum FBR |
1.47 |
4.58 × 104 |
[M − H]− |
146.047 |
146.046 |
L. reuteri FBR |
14.81 |
1.01 × 105 |
[M + H]+ |
253.052 |
253.0527 |
L. reuteri FBR |
1.47 |
2.65 × 106 |
[M − H]− |
146.047 |
146.0458 |
5 |
Raw BR |
Nd |
Nd |
5 |
Raw BR |
ND | [M + H]+ |
Nd |
Nd |
C | 16H8N2O5 |
Apigenin |
ND |
[M + H]− |
ND |
ND |
C | 4 | H | 9NO2 |
Gamma-aminobutyric acid |
L. plantarum FBR |
14.79 |
4.68 × 105 |
[M + H]+ |
269.047 |
269.0457 |
L. plantarum FBR |
1.16 |
1.38 × 105 |
[M − H]− |
102.057 |
102.056 |
L. fermentum FBR |
14.78 |
3.38 × 105 |
[M + H]+ |
269.047 |
269.0457 |
L. fermentum FBR |
1.16 |
2.76 × 104 |
[M − H]− |
102.057 |
102.0563 |
L. reuteri FBR |
14.78 |
5.15 × 105 |
[M + H]+ |
269.047 |
269.0458 |
6 |
Raw BR |
L. reuteri FBR |
1.16 |
1.28 × 106 |
[M − H]− |
102.057 |
102.0561 |
Nd |
Nd |
[M + H]+ |
Nd |
Nd |
C9H6O2 |
Coumarin |
6 |
Raw BR |
ND |
ND |
[M + H]+ |
ND |
ND |
C6H14N4O2 |
Arginine |
L. plantarum FBR |
1.92 |
1.24 × 105 |
[M + H]+ |
147.044 |
L. plantarum | 147.0444 |
FBR |
1.11 |
2.81 × 106 |
[M + H]+ |
175.118 |
175.1183 |
L. fermentum FBR |
1.87 |
2.94 × 105 |
[M + H]+ |
147.044 |
147.0447 |
L. reuteri FBR |
1.90 |
1.55 × 105 |
L. fermentum FBR |
1.14 |
9.09 × 105 |
[M + H]+ |
175.118 |
175.1194 |
[M + H]+ |
147.044 |
147.0445 |
L. reuteri FBR |
1.11 |
4.99 × 106 |
[M + H]+ |
175.118 |
175.1184 |
7 |
Raw BR |
Nd |
Nd |
[M + H]+ |
Nd |
271.2636 |
L. fermentum FBR |
47.26 |
1.44 × 106 |
[M + H]+ |
271.264 |
271.2637 |
L. reuteri FBR |
47.27 |
1.45 × 106 |
[M + H]+ |
271.264 |
271.2638 |
7 |
Raw BR |
ND | Nd |
ND | C15H |
[M − H]− | 14 |
ND | O |
ND |
C5H117 |
Epigallocatechin |
NO | 2 |
Valine |
L. plantarum FBR |
12.26 |
7.44 × 105 |
[M + H]+ |
305.071 |
305.067 |
L. plantarum FBR |
1.49 |
6.15 × 105 |
[M − H]− |
116.073 |
116.0717 |
L. fermentum FBR |
12.28 |
1.20 × 106 |
[M + H]+ |
305.071 |
305.067 |
L. fermentum FBR |
1.50 |
1.37 × 105 |
[M − H]− |
116.073 |
116.0718 |
L. reuteri FBR |
12.28 |
1.38 × 106 |
[M + H]+ |
305.071 |
305.067 |
L. reuteri FBR |
1.45 |
7.61 × 105 |
[M − H]− |
116.073 |
116.0719 |
8 |
Raw BR |
Nd |
Nd |
[M + H]+ |
Nd |
Nd |
C |
8 |
Raw BR | 7 |
1.14 | H | 19 | N | 3 |
Spermidine |
1.19 × 10 | 3 |
[M − H]− |
132.031 |
132.0307 |
C | 4 | H7NO4 |
Aspartic acid |
L. plantarum FBR |
Nd |
Nd |
[M + H]+ |
Nd |
Nd |
L. plantarum FBR |
1.15 |
5 |
Raw BR |
27.69 |
5.28 × 103 |
[M − H]− |
283.265 |
283.2644 |
C | 7.26 × 104 |
[M − H]− |
132.031 |
L. fermentum FBR |
Nd |
Nd |
[M + H]+ |
Nd |
Nd |
132.0303 |
L. reuteri FBR |
0.96 |
8.75 × 105 |
[M + H]+ |
188.176 |
188.1761 |
9 |
Raw BR |
38.06 |
3.21 × 104 |
[M − H]− |
277.182 |
277.1812 |
C17H26O3 |
6-Paradol |
L. plantarum FBR |
38.06 |
4.38 × 105 |
[M − H]− |
277.182 |
277.1812 |
L. fermentum FBR |
38.08 |
4.33 × 105 |
[M − H]− |
277.182 |
277.1813 |
L. reuteri FBR |
18 | H | 36 | O | 2 |
Stearic acid |
L. plantarum FBR |
49.10 |
L. fermentum FBR |
1.15 |
8.76 × 103 |
[M − H]− |
132.031 |
132.0305 |
1.23 × 10 | 6 |
[M − H]− |
L. reuteri FBR |
1.12 |
4.89 × 105 |
[M − H]− |
132.031 |
132.0302 |
9 |
Raw BR |
ND |
ND |
[M − H]− |
ND |
ND |
C9H11NO2 |
Phenylalanine |
L. plantarum FBR |
4.01 |
2.26 × 106 |
[M − H]− |
164.072 |
164.0718 |
L. fermentum FBR |
4.03 |
3.50 × 105 |
[M − H]− |
164.072 |
164.072 |
38.06 |
4.42 × 105 |
[M − H]− |
277.182 |
277.1812 |
283.265 |
283.2645 |
L. fermentum FBR |
49.09 |
1.20 × 106 |
[M − H]− |
283.265 |
283.2644 |
L. reuteri FBR |
49.10 |
1.24 × 106 |
[M − H]− |
283.265 |
283.2645 |
6 |
Raw BR |
34.57 |
3.18 × 104 |
[M − H]− |
243.161 |
243.1605 |
C13H24O4 |
Tridecanedioic acid |
L. plantarum FBR |
34.58 |
2.98 × 105 |
[M − H]− |
243.161 |
243.1606 |
L. fermentum FBR |
34.58 |
2.90 × 105 |
[M − H]− |
243.161 |
243.1604 |
L. reuteri FBR |
34.57 |
3.01 × 105 |
[M − H]− |
243.161 |
Raw BR |
ND |
ND |
[M + H]+ |
ND |
ND |
C12H20O3 |
Traumatin |
L. plantarum FBR |
32.80 |
2.64 × 105 |
[M + H]+ |
213.149 |
213.1491 |
L. fermentum FBR |
32.82 |
4.26 × 105 |
[M + H]+ |
213.149 |
213.1492 |
L. reuteri FBR |
32.82 |
5.20 × 105 |
[M + H]+ |
213.149 |
213.1492 |
L. reuteri |
8 |
Raw BR |
ND |
ND |
[M − H]− |
ND |
ND |
C18H32O5 |
Octadecadienoic acid/Corchorifatty acid F |
L. plantarum FBR |
ND |
ND |
[M − H]− |
ND |
ND |
FBR |
3.98 |
7.21 × 106 |
[M − H]− |
164.072 |
164.0718 |
10 |
Raw BR |
Nd |
Nd |
L. plantarum FBR |
7.64 |
6.19 × 105 |
[M − H]− |
203.084 |
203.0829 |
L. fermentum FBR |
7.66 |
7.77 × 104 |
[M − H]− |
203.084 |
203.0832 |
243.1605 |
L. reuteri FBR |
7.61 |
2.78 × 106 |
L. fermentum FBR |
ND |
ND |
[M − H]− |
ND |
ND |
L. reuteri FBR |
30.87 |
4.08 × 105 |
[M − H]− |
327.219 |
327.2181 |
9 |
Raw BR |
ND |
ND |
[M − H]− |
ND |
ND |
C6H12O4 |
Mevalonic Acid |
L. plantarum FBR |
3.49 |
7.39 × 104 |
[M − H]− |
147.067 |
147.0667 |
10 |
L. fermentum FBR |
ND |
ND |
[M − H]− |
ND |
ND |
L. reuteri FBR |
3.47 |
3.13 × 105 |
[M − H]− |
147.067 |
147.0667 |
[M − H]− |
Raw BR |
ND |
ND |
[M − H]−Nd |
Nd |
C9 |
10 |
Raw BR |
22.59 |
3.99 × 104 | H |
[M − H]− | 8 | O2 |
Cinnamic acid |
ND |
ND |
C | 5 | H |
187.099 | 12 | N2 |
187.0979 | O |
C9H16O42 |
Ornithine |
Azelaic Acid |
L. plantarum FBR |
4.01 |
3.26 × 105 |
[M − H]− |
147.046 |
147.0455 |
L. plantarum FBR |
1.01 |
L. plantarum FBR |
22.50 | 1.53 × 105 |
[M − H]− |
131.084 |
2.77 × 10131.0827 |
5 |
[M − H]− |
187.099 |
187.0979 |
L. fermentum FBR |
4.03 |
4.46 × 104 |
[M − H]− |
147.046 |
147.0456 |
L. fermentum FBR |
1.01 |
6.67 × 104 |
[M − H]− |
131.084 |
131.0828 |
L. fermentum FBR |
22.61 |
6.12 × 104 |
[M − H]− |
187.099 |
187.0978 |
L. reuteri FBR |
3.98 |
1.09 × 106 |
[M − H]− |
147.046 |
147.0454 |
L. reuteri FBR |
L. reuteri | 1.01 |
FBR5.35 × 105 |
22.50[M − H]− |
131.084 |
131.0827 |
6.25 × 105 |
[M − H]− |
187.099 |
187.0979 |
11 |
Raw BR |
Nd |
11 |
Raw BR |
1.12 | Nd |
[M + NH4]+ |
Nd |
Nd |
3.31 × 102 | C |
[M − H]− | 9H8 |
104.036 | O3 |
p-Coumaric acid |
104.0353 |
C | 3 |
11 |
Raw BR |
ND |
ND |
[M − H]− |
ND |
ND | H7NO3 |
CSerine |
9H18O3 |
9-Hydroxynonanoic acid |
L. plantarum FBR |
1.86 |
1.06 × 10 |
L. plantarum FBR |
1.12 | 6 |
[M + NH4]+ |
182.081 |
182.0813 |
3.06 × 10 | 5 |
[M − H]− |
104.036 |
104.0353 |
L. plantarum FBR |
23.49 |
3.10 × 104 |
[M − H]− |
173.119 |
173.1187 |
L. fermentum FBR |
1.92 |
L. fermentum FBR |
L. fermentum FBR |
23.50 | 6.90 × 105 |
[M + NH4]+ |
182.081 |
3.49 × 10182.0813 |
1.13 |
4.70 × 10 | 4 |
[M − H]− |
104.036 |
104.0356 |
3 |
[M − H]− |
173.119 |
173.1188 |
L. reuteri |
L. reuteri FBR |
23.48 |
1.39 × 105 |
[M − H]− |
173.119 |
173.1186 |
12 |
Raw BR |
39.06 |
2.45 × 103 |
[M − H]− |
313.24 |
313.2389 |
C18H34O4 |
Octadecanedioic acid |
L. plantarum FBR |
39.07 |
[M − H]− |
203.084 |
203.0829 |
3.52 × 10 | 5 |
[M − H]− |
18 |
Raw BR |
ND |
ND |
[M + H]+ |
ND |
ND |
C5H9NO2 |
Proline |
313.24 |
313.2388 |
L. fermentum FBR |
39.06 |
3.22 × 105 |
[M − H]− |
313.24 |
313.2389 |
L. reuteri FBR |
39.06 |
3.83 × 105 |
[M − H]− |
313.24 |
313.2386 |
13 |
Raw BR |
ND |
ND |
[M − H]− |
ND |
ND |
C18H34O5 |
Pinellic acid |
L. plantarum FBR |
33.48 |
3.12 × 105 |
[M − H]− |
329.234 |
329.2337 |
L. plantarum FBR |
L. fermentum FBR |
ND |
ND |
[M + H]+ |
ND |
ND |
7 |
FBR |
1.87 |
2.13 × 106 |
[M + NH4]+ |
182.081 |
182.0812 |
12 |
L. reuteri FBR |
1.12 |
5.73 × 105 |
[M − H]− |
104.036 |
104.0353 |
Raw BR |
Nd |
Nd |
[M − H]− |
Nd |
Nd |
C |
12 |
Raw BR |
ND |
ND |
[M − H]− | 9 | H | 10O3 |
Methoxyphenylacetic acid |
ND |
ND |
C | 6 | H | 13 | NO | 2 |
Leucine |
L. plantarum FBR |
L. plantarum | 15.28 |
FBR |
2.46 | 5.20 × 106 |
1.95 × 10[M − H]− |
6165.057 |
165.0558 |
[M − H]− |
130.088 |
130.0874 |
L. fermentum FBR |
15.29 |
4.09 × 105 |
[M − H]− |
165.057 |
165.056 |
L. fermentum FBR |
2.48 |
3.24 × 105 |
[M − H]− |
130.088 |
130.0875 |
L. reuteri FBR |
15.27 |
1.92 × 107 |
[M − H]− |
165.057 |
165.0557 |
L. reuteri FBR |
2.41 |
6.63 × 106 |
[M − H]− |
130.088 |
130.0875 |
13 |
Raw BR |
Nd |
Nd |
[M − H]− |
Nd |
Nd |
C7H6O3 |
Sesamol/2-Hydroxybenzoic acid |
13 |
Raw BR |
ND |
ND |
[M − H]− |
ND |
ND |
C5H10N2O3 |
Glutamine |
L. plantarum FBR |
Nd |
Nd |
[M − H]− |
Nd |
Nd |
L. plantarum FBR |
ND |
ND |
[M − H]− |
ND |
ND |
L. fermentum FBR |
Nd |
Nd |
[M − H]− |
Nd |
Nd |
L. fermentum FBR |
ND |
ND |
[M − H]− |
ND |
ND |
33.48 |
L. reuteri FBR |
19.63 |
3.24 × 105 |
[M − H]− |
137.025 |
137.0249 |
L. reuteri FBR |
1.10 |
1.62 × 104 |
[M − H]− |
145.063 |
145.0619 |
14 |
Raw BR |
Nd |
Nd |
[M − H]− |
Nd |
Nd |
C8H8O |
Vanillic acid |
14 |
Raw BR |
ND |
ND |
[M − H]− |
ND |
ND |
C9H11NO3 |
Tyrosine |
L. plantarum FBR |
15.28 |
3.18 × 105 |
[M − H]− |
119.051 |
119.0504 |
L. plantarum FBR |
1.98 |
3.38 × 105 |
[M − H]− |
180.068 |
180.0667 |
L. fermentum FBR |
Nd |
Nd |
L. fermentum | [M − H]− |
FBR |
ND | Nd |
Nd |
ND |
[M − H]− |
ND |
ND |
L. reuteri FBR |
15.27 |
1.27 × 106 |
[M − H]− |
119.051 |
L. reuteri FBR |
1.89 |
4.08 × 105 |
[M − H]− |
180.068 | 119.0504 |
180.0667 |
15 |
Raw BR |
Nd |
Nd |
Nd |
Nd |
Nd |
C6H8O6 |
Ascorbic acid (Vitamin C) |
L. plantarum FBR |
Nd |
Nd |
Nd |
Nd |
Nd |
L. fermentum FBR |
Nd |
Nd |
Nd |
Nd |
Nd |
L. reuteri FBR |
1.02 |
3.05 × 103 |
[M + H]+ |
209.009 |
209.0107 |