Quinoa has acquired a great interest due to its high content of nutrients and biomolecules that have nutritional and medicinal properties. The aim of this study was to compare the total phenolic content (TPC), total flavonoids (TF), and the antioxidant capacity of 20 varieties of seeds and sprouts of quinoa extract. Quinoa seeds were germinated for 72 h and dried in an oven at 45 °C. The extracts were obtained by dynamic extraction using methanol. Phytochemical analysis with liquid chromatography coupled with mass spectrometry (LC-ESI-MS/MS), TPC, TF, and the antioxidant capacity was carried out and compared between both extracts. The TPC was determined with Folin-Ciocalteu reagent, TF with AlCl₃, and the antioxidant capacity was determined according to the DPPH and ABTS assays. Sprout extracts showed high values of TPC (31.28 ± 0.42 mg GAE/g; Pasankalla variety), TF (14.31 ± 0.50 mg EQ/g; black Coito variety), and antioxidant capacity (IC_{50 (DPPH)}: 12.69 ± 0.29 µg/mL and IC_{50 (ABTS):} 3.51 ± 0.04 µg/mL; Pasankalla). The extracts of the Pasankalla variety revealed 93 and 90 phytochemical constituents in the seeds and sprouts, respectively, such as amino acids, phenolic acids, flavonoids, fatty acids, and triterpene saponins, among others. Quinoa sprouts showed a high content of TPC and TF, and high antioxidant capacity compared with seed extracts, especially the Pasankalla variety.

Jatropha macrantha Müll Arg. L is also known as “huanarpo macho” and used in the Peruvian traditional medicine as an aphrodisiac and erectile dysfunction (ED). The aim of this study was to determine the phytochemical constituents in leaves and stems ethyl acetate fraction (LEAF and SEAF) of J. macrantha and to compare the antioxidant activity and the ameliorative effect on ketamine-induced erectile dysfunction in rats. The phytochemical constituents were determined by LC-ESI-MS/MS, the total phenolic compounds and total flavonoids (TPC and TF) by Folin-Ciocalteu and aluminum chloride, respectively. The antioxidant activity was determined by DPPH, ABTS, and FRAP assays. Experimental groups were divided as follows: I: negative control; II: positive control (ketamine at 50 mg/ kg/d); III: sildenafil 5 mg/kg; IV, V, VI: LEAF at 25, 50 and 100 mg/kg, respectively, and VII, VIII, IX: SEAF at 25, 50, and 100 mg/kg, respectively. The phytochemical analysis revealed the presence mainly of coumarins, flavonoids, phenolic acids, and terpenes. TPC of LEAF and SEAF were 359 ± 5.21 mg GAE/g and 306 ± 1.93 mg GAE/g, respectively; TF in LEAF and SEAF were 23.7 ± 0.80 mg EQ/g, and 101 ± 1.42 mg EQ/g, respectively. The DPPH, ABTS, FRAP in SEAF were 647 ± 3.27; 668 ± 2.30; and 575 ± 2.86 μmol TE/g, respectively, whilst LEAF showed 796 ± 3.15; 679 ± 0.85; and 806 ± 3.42 μmol TE/g, respectively. Regarding sexual behavior, LEAF showed a better effect in mount frequency, intromission frequency, ejaculation frequency, mount latency, intromission latency, ejaculatory latency, and post ejaculatory latency than SEAF. As conclusion, LEAF of J. macrantha at 50 mg/kg showed a better effect on sexual behavior in male rats with erectile dysfunction than SEAF but not higher than sildenafil.

Chenopodium quinoa sprouts possess a superior nutritional profile relative to conventional quinoa seeds, which is mainly attributable to their germination process. Sprouting quinoa is able to preserve its substantial nutritional value while enhancing its bioavailability and digestibility. The aim of this study was to evaluate the gastroprotective effects of hydroalcoholic extracts of three varieties of quinoa sprouts (pasankalla, yellow maranganí, and black coito). The chemical compounds were determined using LC-MS (Liquid Chromatography–Mass Spectrometry). Antioxidant activity was determined using two analytical methods, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). To evaluate the gastroprotective effects of these hydroalcoholic extracts in Holtzman male rats, a gastric lesion was induced with 96% ethanol after the administration of the hydroalcoholic extract of the three varieties of C. quinoa sprouts. Our phytochemical analysis results reveal the presence of amino acids (valine, leucine, isoleucine, phenylalanine, tryptophane, proline, tyrosine, and arginine, among others) and their derivatives, organic acids, monosaccharides, lipids, nucleobases/nucleosides, steroids, triterpene saponins, and coumarins. The pasankalla, yellow maranganí, and black coito varieties exhibited antioxidant capacities of 36.70, 32.32, and 34.63 µmol Trolox equivalent (TE)/mg of extract for the DPPH radical and 56.61, 41.56, and 52.09 µmol TE/mg of extract for the ABTS radical, respectively. The percentage of antisecretory efficiency at a dose of 500 mg/kg for the pasankalla, yellow maranganí, and black coito varieties was 34.13%, 30.67%, and 26.67%, respectively, and the anti-ulcer effect, expressed as a percentage of inhibition of ulcer formation, was 74.7%, 67.4%, and 69.5%, respectively. In contrast, the groups treated with ranitidine and sucralfate exhibited percentages of 59.0% and 67.4%, respectively. The pasankalla quinoa exhibits more significant antioxidant activity and a stronger gastroprotective effect compared to the other varieties examined in this study. In conclusion, the hydroalcoholic extracts of the three varieties of C. quinoa sprouts exhibited a gastroprotective effect, and the pasankalla variety at a dose of 500 mg/kg exhibited a stronger protective effect on the gastric mucosa of the rats.

In this research, we aimed to determine the antioxidant activity of an atomized extract of Cnidoscolus diacanthus (Pax & K. Hoffm.) J.F. Macbr., known in Peru as “huanarpo hembra”, and its effect on sex hormone levels. Its phytochemical profile was determined using liquid chromatography–mass spectrometry (LC–MS), while its total phenol content (TPC) and total flavonoids (TFs) were determined using the Folin–Ciocalteu method and the aluminum chloride method. Its antioxidant activity was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH), the radical 2,2-azino-bis-3-ethylbenzthiazolin-6 sulfonic acid (ABTS), and ferric-reducing antioxidant power (FRAP). The biological activity of C. diacanthus and its effect on sexual hormones were determined in Holtzman rats of both sexes. Phytochemical analysis revealed the presence of flavonoids and phenolic compounds in its leaves and stems, mainly rutin, quercetin, chlorogenic acid, and genistein. However, the stem extract contained higher total phenol (464.38 ± 4.40 GAE/g) and flavonoid (369.17 ± 3.16 mg QE/g of extract) contents than the leaf extract (212.38 ± 3.19 mg GAE/g and 121.49 ± 2.69 mg QE/g). For DPPH, ABTS, and FRAP, the Trolox-equivalent antioxidant capacity (TEAC) was 597.20 ± 5.40 µmol/g, 452.67 ± 5.76 µmol/g, and 535.91 ± 1.56 µmol/g, respectively, for the stems, while for the leaves, it was 462.39 ± 3.99 µmol/g, 202.32 ± 5.20 µmol/g, and 198.13 ± 1.44 µmol/g, respectively. In terms of the values for hormonal levels, at a dose of 100 mg/kg of the extract, testosterone levels of 1.430 ng/mL (with the leaf extract) and 1.433 ng/mL (with the stem extract), respectively, were found in the male rats. Regarding estradiol levels, in the female rats, these were 10.425 ng/mL (leaf extract) and 8.775 ng/mL (stem extract), while their levels of luteinizing hormone were 0.320 mIU/mL (leaf extract) and 0.273 mIU/mL (stem extract). For the follicle-stimulating hormone, levels of 0.858 mIU/mL (leaf extract) and 0.840 mIU/mL (stem extract) were found in the female rats, and levels of 0.220 mIU/mL (leaf extract) and 0.200 mIU/mL (stem extract) were found in the male rats. It is concluded that the C. diacanthus stem extract had a greater antioxidant capacity than the leaf extract, while both extracts had a superior effect on the sex hormone levels in the female rats compared to the male rats.

Objectives. To determine the resistance and minimum inhibitory concentration (MIC) of erythromycin, azithromycin, ciprofloxacin, and tetracycline in Campylobacter coli strains isolated from chicken carcasses sold in Lima, Peru. Materials and methods. Cryopreserved strains of C. coli (n=106) were reactivated and the concordance (Kappa coefficient) of the resistance and MIC results between the disk diffusion (DD), E-test (ET), and microdilution plate (MDP) tests was evaluated. Results. Ninety-seven strains were reactivated, of which 94 to 100% were resistant to ciprofloxacin, erythromycin, and tetracycline, while only 58% were resistant to azithromycin in the DD test. The ET and MDP tests showed 78 to 100% of resistant strains, with azithromycin presenting the lowest percentage of resistance. More than 70% of strains were resistant to at least three antibiotics in all three tests. In addition, 50%, 69%, and 100% of strains had a MIC ≥ 32 μg/mL for ciprofloxacin, azithromycin, and tetracycline/erythromycin, respectively. Conclusions. C. coli strains from chicken carcasses had a high percentage of multidrug resistance. The concordance between the three tests was almost perfect, but the ET strips showed maximum concentrations that are insufficient for the MIC in these strains. It is recommended to perform resistance and MIC testingusing the MDP, as it allows for a wider range of antibiotic concentrations to be used.