Distribution of essential oils in leaf tissue of an F2 population of Citrus
SummaryThe identification and distribution of 17 mono- and sesquiterpenes in an F2 population produced from selfing of an interspecific F1 hybrid is presented. A mode of inheritance for most of these components is attempted, percentages of leaf oil components and a correlation matrix are given.
The Effect of Rootstocks on Peel Components and Juice Quality of Clementine Mandarin (Citrus clementina)
Studies have shown that oxygenated compounds and TSS/TA are important for beverage and food industries. It seems that Citrus rootstocks have a profound influence on oxygenated compounds and TSS/TA. The aim of this research is to identify rootstock that can synthesize the maximum level of oxygenated compounds and TSS/TA. Peel oil was extracted using mechanical presses and eluted using n-hexane. Finally compounds were analyzed using GC-FID and GC-MS. Total soluble solids were determined using a refractometer. Twenty-seven, twenty-five and twenty-three compounds were identified in Sour orange, Swingle citromelo and Troyer citrang rootstocks, respectively. Limonene (92.87% to 93.16) and myrcene (1.57% to 1.79%) were the main compounds. Among the three rootstocks studied, Swingle citromelo demonstrated the maximum level of oxygenated compounds and TSS/TA. As a result of our research, we can express that the rootstocks can affect the amount of oxygenated compounds and TSS/TA.
Comparison between Two Chemicals for Reducing Scale Formation in Reverse Osmosis Systems
In this present research was transacted with the calcium carbonate scale inhibition on the membrane surface of the reverse osmosis desalination system. Influence of changing feed solution flow rate (10-25)l/h, pH of the feed solution (6-10) on the recovery ,penetrate flow rate and total dissolved solid in (RO) system by using solution of calcium carbonate as feed solution was investigated, furthermore the effect of adding two types of scale inhibitor ,zinc chloride and polyamino polyether methylene phosphonate with difference concentration (2-8)mg/l for zinc chloride and (8-15) mg/l for polyamino polyether methylene phosphonate was calculated. The results showed that the permeate rate increases as the feed flow rate augmentation ,while it reducing with time, the total dissolved solids decreases as the feed flow rate increases while it increases with time and recovery rate decreases as the feed flow rate increases and it also decreases with time. It was concluded that the permeate rate decreases as the feed solution pH value increases and it cause high scale forming thus decrease the permeate TDS.By adding the scale inhibitor, it was found that the permeate rate and recovery rates increases as the concentration of inhibitor increases while the total dissolved solids decreases in the permeate with increasing the concentration of both inhibitors .It was discovered that Polyamino polyether methylene phosphonate more sturdy than zinc chloride as scale inhibitor for reverse osmosis desalination system in all concentrations was studied in this article.