Physicochemical properties of products and waste of black seed produced by cold press method

Abstract

Black seed or black cumin has the scientific name Nigella sativa (NS) is an herbal plant that is widely used to treat various diseases. The extraction of oil from NS seeds produces a byproduct called NS waste. This study aims to evaluate the physicochemical properties of products and NS waste produced by the cold press method. Analysis of physical properties was carried out using a completely randomized design (CRD) with 3 treatments and 5 replications. The thymoquinone test was carried out using high-performance liquid chromatography (HPLC). The moisture content of seed and NS waste were 6.21 and 7.91%, respectively. The crude protein content in NS seeds and waste reached 19.34 and 27.78% and crude fat contents were 23.99 and 16.93%. The TQ content in NS seeds, oil, and waste were 1680, 2701, and 350 ppm, respectively. Other active compounds in NS seeds are saponins, tannins, flavonoids, triterpenoids, and glycosides. Extraction rate of NS using cold press method is 34.46% and produces NS oil products and waste with the desired physicochemical properties, so the product can be used as material for the pharmaceutical purposes.

Biological Properties, Phenolic Profile, and Botanical Aspect of Nigella sativa L. and Nigella damascena L. Seeds: A Comparative Study

“…According to the literature, the nutritional value of NS is relatively good [ 26 ], but differences were observed in the measured contents. The estimated fats content was inferior to that presented by Kabir et al [ 24 ], whereas carbohydrates were higher than the values presented by Kabir et al, and protein content was also relatively superior to that reported by Al-Jassir [ 12 ], Kabir et al [ 24 ], and Barkah et al [ 40 ]. It should be noted that no data are found about the proximal composition of ND seeds, and only a few existing studies have given crude fat and protein concentrations.…”

A phase I clinical trial to evaluate the safety of thymoquinone-rich black cumin oil (BlaQmax®) on healthy subjects: Randomized, double-blinded, placebo-controlled prospective study

“…Though cold pressing was one of the oldest methods for the commercial scale production, supercritical extraction is now gaining importance as the green technology of preference [12] . Cold-pressed oil is widely available as black cumin oil and was found to contain only less than 0.5% TQ, when a validated high performance liquid chromatography (HPLC) method was used for quantification [13] . As per the current understanding, TQ has been identified as the major bioactive molecule responsible for the wide range of therapeutic effects and safety [1] , [14] , [15] , [16] , [17] , [18] .…”

The Influence of Micronization on the Properties of Black Cumin Pressing Waste Material

“…Recent research indicates that black cumin cakes have a high nutritional value because they contain proteins, phenolics, essential amino acids, and bioactive compounds. Meanwhile, significant quantities of these by-products are not utilized effectively, which may potentially result in economic loss and environmental pollution [ 8 , 9 ]. Due to its beneficial properties, cumin cake is used as a valuable addition to various functional bakery products [ 7 ] or fermented non-dairy beverages [ 10 ].…”