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Total carotenoid and chlorophyll amounts of caper seed oils extracted in cold press and Soxhlet extraction methods were determined as 18.21 (cold press) and 17.33 (Soxhlet) to 31.68 (cold press) and 30.06 mg/g (Soxhlet), respectively. The caper seed oils contained 54.125 (cold press) and 86.63 mg/100 g (Soxhlet) total flavonoid. Total carotenoid and chlorophyll contents of seed oils extracted by cold press were found high. In addition, total phenolic, total flavonoid, and antioxidant activity values of seed oils extracted by Soxhlet were detected as higher. Gallic acid amounts of caper seed oils were determined as 3.70 (cold press) and 5.48 mg/100 ml (Soxhlet). 1,2‐Dihydroxybenzene amounts of seed oil samples were identified as 5.15 (cold press) and 8.28 mg/100 ml (Soxhlet). The oleic and linoleic acid amounts of oils extracted by the cold press and Soxhlet were detected as 11.67% and 12.08% to 54.25% and 54.22%, respectively. Practical applications: Caper plant grows in many countries of Africa, Asia and South European. It is a source of natural components in the food industry. Cold pressing procedure involves no heat or chemical treatments. Cold press technique is simple and environment‐friendly method. Solvent extraction on the other hand is a cost‐effective and fast method of oil extraction. The current study provides comparison of these two methods to extract natural phytochemicals in caper seed oil. [ABSTRACT FROM AUTHOR]

Caper seed oil obtained by the soxhlet extraction had significantly (p <.05) higher acidity, peroxide content, viscosity, unsaponifiable matter, total phenolics, and antioxidant values than those of oils extracted by the cold‐press for all tested varieties. Cold‐pressed oil had significantly (p <.05) higher iodine and saponification values compared to oil extracted by the Soxhlet system. The oil obtained by cold‐press resulted in higher fatty acid levels for all samples as compared to Soxhlet extracts. The tocopherol contents of the oils extracted by cold pressing were higher than those of Soxhlet extracts, except γ‐tocopherol, which was significantly (p <.05) higher in the Soxhlet‐extracted oils for Capparisspinosa. For all varieties, the level of phenolic compounds was significantly (p <.05) reduced when the oil was extracted by the cold‐pressing system. In general and regardless of the extraction system, the type of variety was found to have a significant effect on all parameters measured. Practical applications: Caper plant grows at the most countries of Africa, Asia, and South European. Capers have very important roles for beneficial natural components in the food industry. Capers have very important roles for beneficial natural components in the food industry. There are a significant increase in the interest of bioactive compounds from plant products. Cold‐pressing procedure involves no heat or chemical treatments. Cold‐press technique is simple and environment‐friendly method. Solvent extraction, on the contrary, is a cost‐effective and fast method of oil extraction. [ABSTRACT FROM AUTHOR]

In this study, changes in bioactive properties and phenolic compounds of different caper parts were reported. Total phenolic contents of C. ovata and C. spinosa plants varied between 175.35 mgGAE/100 g (fruit) and 518.4 mgGAE/100 g (small bud) to 143.58 mgGAE/100 g (fruit and 597.57 mgGAE/100 g (small bud), respectively. While total flavonoid contents of C. ovata parts vary between 9.12 mg/g (fruit) and 37.22 mg/g (small bud), total flavonoid contents of C. spinosa parts changed between 7.43 mg/g (fruit) and 62.39 mg/g (small bud). Antioxidant activity values of C. ovata and C. spinosa parts varied between 53.43% (sprout) and 76.40% (medium bud) to 50.51% (fruit) and 76.65% (medium bud), respectively. While (+) catechin contents of C. ovata parts change between 22.16 mg/100 g (fruit) and 149.13 mg/100 g (small bud), (+)‐catechin contents of C. spinosa parts varied between 65.50 mg/100 g (fruit) and 99.29 mg/100 (small bud). 1,2‐Dihydroxybenzene contents of C. ovata ranged from 33.4 mg/100 g (fruit) to 142.41 mg/100 g (small bud) while 1,2‐dihydroxybenzene contents of C. spinosa parts are found between 75.17 mg/100 g (fruit) and 127.32 mg/100 g (medium bud). Practical applications: Caper plant grows at the most countries of Africa, Asia, and South European. Capers have very important roles for beneficial natural components in the food industry. Caper buds and fruits are used for human nutrition. It is utilized to prepare salada as a culinary herb. Caper has pungent and bitter flavor, and are used as an appetizer with olives, cheese, and nuts. There are a significant increase in the interest of bioactive compounds from plant products. Curative and medicinal properties of capers are linked to the presence of bioactive compounds. [ABSTRACT FROM AUTHOR]