اختراع: روش هایی برای تولید قارچ های دکمه ای بدون اسپور
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روش هایی برای تولید قارچ های دکمه ای بدون اسپور
مقاله ۲۰۱۲: ویژگی های آنتی اکسیدانی گونه های قارچ های خوراکی مختلف و افزایش ضریب تبدیل شاه صدف با استفاده از مواد محلی در دست رس برای خاک پوششی
Antioxidant properties of different edible mushroom species and increased bioconversion efficiency of Pleurotus eryngii using locally available casing materials
Total phenolics, radical scavenging activity (RSA) on DPPH, ascorbic acid content and chelating activity on Fe2+ of Pleurotus citrinopileatus, P. djamor, P. eryngii, P. flabellatus, P. florida, P. ostreatus, P. sajor-caju and Hypsizygus ulmarius have been evaluated. The assayed mushrooms contained 3.94-21.67 mg TAE of phenolics, 13.63-69.67% DPPH scavenging activity, 3.76-6.76 mg ascorbic acid and 60.25-82.7% chelating activity. Principal Component Analysis (PCA) revealed that significantly higher total phenolics, RSA on DPPH and growth/day was present in P. eryngii whereas P. citrinopileatus showed higher ascorbic acid and chelating activity. Agglomerative hierarchical clustering analysis revealed that studied mushroom species fall into two clusters; Cluster I included P. djamor, P. eryngii and P. flabellatus, while Cluster II included H. ulmarius, P. sajor-caju, P. citrinopileatus, P. ostreatus and P. florida. Enhanced yield of P. eryngii was achieved on spent compost casing material. Use of casing materials enhanced yield by 21-107% over non-cased substrate.
Highlights
► Pleurotus eryngii possessed higher total phenolics, RSA on DPPH and growth/day. ► Higher ascorbic acid and chelating activity was found in P. citrinopileatus. ► Based on AHC, studied edible mushroom species were fall into two clusters. ► Enhanced BE of P. eryngii was achieved using spent compost casing overlay.
Keywords
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ویژگی های آنتی اکسیدانی گونه های قارچ های خوراکی م
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مقاله ۲۰۱۲: تاثیر باقیمانده ساقه قارچ شاه صدف روی کیفیت گوشت جوجه های گوشتی
The effect of Pleurotus eryngii stalk residue on the oxidative status and meat quality of broiler chickens.
Abstract
Pleurotus eryngii stalk residue (PESR) is a by-product of the edible portion of the fruiting body. The present study was conducted to evaluate the effects of PESR on oxidative status and meat quality of broilers. Two hundred fifty 1-d-old male broilers (Arbor Acre) were evenly divided by gender and randomly allocated into control (corn-soybean meal diet) or 1.0, 5.0, 10.0 or 20.0 g/kg dried PESR groups. The results revealed that at 35 d, the dried PESR groups displayed a significantly increased water-holding capacity and decreased storage loss of breast and thigh fillets when compared to the control group. Regarding fillets color, the L* (lightness) values were lower and the a* (redness) and b* (yellowness) values were higher following dried PESR supplementation. In 5.0 to 20.0 g/kg PESR supplementation groups, the activities of antioxidative enzymes were significantly elevated in serum, liver, spleen and fillet tissues when compared to control group. Additionally, malondialdehyde production was slightly decreased in PESR supplementation group. Lower crude fat contents were observed in fillet tissues of 5.0 to 20.0 g/kg PESR groups when compared with control group. In conclusion, PESR may potentially be used as an antioxidant to decrease lipid peroxidation and improve meat quality in broilers.
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تاثیر باقیمانده ساقه قارچ شاه صدف روی کیفیت گوشت ج
مقاله قارچ: میزان عملکرد بیولوژیکی قارچ دکمه ای گونه برازیلینسیس یا همان بلزیی یا سوبرافیشنس کشت شده با کمپوست قارچ با غلظت های نیتروژن
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میزان عملکرد بیولوژیکی قارچ دکمه ای گونه برازیلینس
مقاله ۲۰۱۲: لاکیز خارچ سلولی از قارچ صدفی: مقاومت به دما و واکنش نسبت به یون های فلزی
Adamafio, N.A.; Sarpong, N.S.; Mensah, C.A.; Obodai, M.
Date: 2012
Abstract:
The metal ion response profile and thermal stability of extracellular laccase from Pleurotus ostreatus strain EM-1, which is widely cultivated in Ghana, were investigated to provide information essential for the establishment of laccase-based applications in the country. P. ostreatus (Jacq. ex. fr) Kummer strain EM-1 was cultivated on a mixture of Triplochiton scleroxylon (wawa) sawdust, rice bran and lime. Extracellular laccase was isolated from spent sawdust four to six days after the appearance of mushroom pinheads and subjected to ammonium sulphate precipitation and gel filtration using Sephadex G-75. Laccase activity was assayed spectrophotometrically at 468 nm using 2, 6-dimethoxyphenol in Mcilvaine’s citrate-phosphate buffer, pH 5.0. Two metal ions, Cu2+ and Mn2+, stimulated P. ostreatus strain EM-1 laccase activity. Cu2+ caused a maximal stimulatory effect of 324.4%, while Mn2+ exerted a more moderate stimulatory effect of 180.5%. Magnesium ions had no effect on the activity of the enzyme. Activity decreased by 77.4% after 20 min of incubation at 50°C. During seven days of storage at either 4 or -20°C, laccase activity decreased by 87.7-88.8%. This rate of deactivation was reduced to 28.1-32.8% over the same period when 20 mM CuSO4 was added to the enzyme prior to storage. The findings suggest that P. ostreatus strain EM-1 laccase would not be a suitable biocatalyst for high temperature processes. Furthermore, copper and to a lesser extent, manganese can be used as stimulatory additives during P. ostreatus strain EM-1 laccase-catalyzed processes at ambient temperature and for short-term storage of the enzyme.
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مقاله ۲۰۱۲,
لاکیز خارچ سلولی از قارچ صدفی,
مقاومت به دما و واکنش نسبت به یون های فلزی
