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排序方式: 共有19条查询结果,搜索用时 531 毫秒
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This study was conducted to investigate the effects of different levels of black cumin seeds (Nigella sativa L.) on performance, intestinal Escherichia coli count and morphology of jejunal epithelial cells in laying hens. A total of 100 Leghorn laying hens (Hy‐Line W‐36) of 49 weeks old were randomly distributed among five cage replicates of five birds each. Experimental diets consisted of different levels (0%, 1%, 2% and 3% of diet) of dietary black cumin inclusion. The experimental period lasted for a total of 10 weeks, and egg quality indexes and laying hens' performance were measured as two 35‐day trial periods. At the final day, two hens per replicate were slaughtered to investigate the influence of dietary treatments on intestinal E. coli colonization and morphology of jejunal cells. Although dietary black cumin in all supplementation levels decreased (p < 0.05) the enumeration of ileal E. coli, the morphological and histological alterations in small intestine such as enhancement of villus height to crypt depth ratio, increased goblet cell numbers and proliferation of lamina propria lymphatic follicles were observed after dietary supplementation with at least 2% black cumin. Dietary treatments decreased (p < 0.05) the concentration of serum cholesterol and triglycerides and increased (p < 0.05) serum HDL concentration and relative weight of pancreas; however, the egg yolk cholesterol was not influenced by dietary treatments. In addition, dietary supplementation with black cumin improved (p < 0.05) eggshell quality and Haugh unit. The best feed conversion ratio was obtained when diets were supplemented with 2% black cumin. This improvement was due to the increase (p < 0.05) in egg mass and contemporaneous decrease (p < 0.01) in feed consumption. The present results indicated that regardless of supplementation level, dietary inclusion of black cumin decreased E. coli enumeration in ileal digesta and improved serum lipid profile and eggshell quality, whereas the best intestinal health indices and haying hens' performance were obtained by at least 2% black cumin seeds.  相似文献   
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The bioavailability of iron from local plants(black cumin seeds, milk thistle seeds, sesame seedsand thyme leaves) was investigated. Apparentabsorption of iron was calculated by subtracting fecal iron(using total collection of feces) from iron intake inSprague-Dawley rats. Two trials of animal feeding wereperformed. Liver and serum concentrations of iron, andserum hemoglobin concentration were taken as responseparameters for the bioavailability. Dry thyme wasparticularly rich in iron (117.2 mg/100 g dry matter)and milk thistle seeds in crude fiber (25 g/100 g drymatter). Rats fed the dry thyme diet or thatsupplemented with 5% egg white died but when the dietwas supplemented with 10% egg white, the animalssurvived. Iron intake and apparent and total ironabsorption were highest for the rats fed the drythyme-egg white diet. Liver weights for the groups fedblack cumin seeds and dry thyme were significantlyhigher (p < 0.05) than those for the groups fed milkthistle and sesame seeds. Liver content of ironwas highest for the animals fed black cumin seeds.Serum iron content increased significantly (p < 0.05)for the animals fed black cumin seeds, and serumhemoglobin concentration increased significantly (p < 0.05) in the groups fed milk thistle seed and blackcumin seed diets, but decreased for the group fed thethyme-egg white diet. It is concluded from this studythat iron was better utilized from black cumin seedsas indicated by liver storage of iron. On the otherhand, thyme had the highest iron absorption but lowestutilization.  相似文献   
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新疆孜然黄酮超声提取及抗氧化作用研究   总被引:1,自引:1,他引:0  
探讨新疆孜然黄酮的最佳提取工艺,并考察新疆孜然黄酮的抗氧化活性。采用超声波提取法,分别考察了溶剂浓度、料液比、超声时间、超声功率对结果的影响。选用L9(34)正交试验对黄酮的提取工艺进行研究。并采用总还原力法和DPPH法,测定了新疆孜然的抗氧化活性。孜然中黄酮的最佳提取工艺参数为:70%乙醇浓度,料液比1:35,超声提取时间80 min,超声提取功率125W。正交试验中影响黄酮得率的因素依次为:超声功率,料液比,溶剂浓度,提取时间。抗氧化活性试验结果显示,孜然总黄酮具有较好的总还原力,并对DPPH自由基的清除作用明显,IC50值为0.109 mg/mL。超声提取是一种理想的提取方法,新疆孜然黄酮作为抗氧化剂具有很大的开发应用价值。  相似文献   
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孜然鹅肉火腿肠的研制   总被引:1,自引:1,他引:0  
根据鹅肉的特点,加入环状糊精以除去鹅肉的腥味,用改性淀粉改善火腿肠的品质,在鹅肉中加入孜然,经斩拌、灌制、煮制,制成具有孜然风味的鹅肉火腿肠。  相似文献   
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The purposes of this study were evaluate the effects of biofertilizers inoculation on growth indices, yield and radiation use efficiency (RUE) in black cumin under Mashhad climatic conditions. This field experiment was carried out based on a randomized complete block design with three replications. This experiment was performed at Agricultural Research Station, Ferdowsi University of Mashhad, Iran, during two growing seasons 2007–2008 and 2008–2009. Treatments were (A) Azotobacter paspali, (B) Azospirillum brasilense, (C) Rhizophagus irregularis, A + C, B + C, A + B, A + B + C and control. In all treatments, except control, 100 g of seeds were inoculated with15 mg of each biofertilizer. Results indicated that leaf area index (LAI) and accumulative dry matter (DM) showed an increasing trend up to 1863°Cd and a short declining trend afterwards. The relation between accumulative DM and absorbed photosynthesis active radiation (PARa) was linear. Radiation use efficiency (RUE) fluctuated from 0.55 gMJ?1 (control) to 0.89 gMJ?1 (B+C). Inoculation with biofertilizers enhanced root development and hence availability of moisture and nutrients, particularly nitrogen and phosphorus. Since these ecological fertilizers produce many growth regulators for the plant which promote LAI and accumulative DM and therefore yield, PARa and RUE enhanced.  相似文献   
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孜然种质资源研究与利用进展   总被引:1,自引:0,他引:1  
孜然在我国已有千余年的栽培历史,是北方人喜爱的调料,适宜与多种作物间套种植,经济效益较好。与大宗作物相比,孜然的种质资源利用率较低,品种改良落后,仍以地方品种和农家品种为主。育种手段以常规为主,选育新品种进程缓慢。从孜然的种质资源收集与利用、生育特性、孜然应用前景进行综述,供中国孜然科研工作者参考,并期望对提高国内孜然遗传研究与育种利用水平有所裨益。  相似文献   
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 【目的】检测孜然是否经过辐照处理并估算孜然原初吸收剂量;【方法】以孜然为对象,采用电子自旋共振波谱(ESR)技术研究孜然在0~15.0 kGy剂量范围内ESR波谱特征变化,分析辐照剂量与信号强度的关系以及贮藏时间对自由基浓度的影响,并采用附加剂量法估测孜然样品的原初吸收剂量;【结果】辐照后孜然的ESR波谱信号强度随辐照剂量增加而增大,经过220 d贮藏期后仍能应用ESR波谱法检测孜然是否经过辐照处理。附加剂量法能够用于辐照孜然的剂量估算,其中利用3次多项式在不同贮藏时间里(10 d,20 d和30 d)拟合估算出的每个样品的剂量值与原初剂量的偏差均在1 kGy范围内,比用对数方程拟合估算出的剂量值更为准确;【结论】ESR波谱技术能够定性和定量鉴定辐照孜然。  相似文献   
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This study evaluates the effect of dietary cumin essential oil's (CEO) and cumin essential oil's loaded iron nanoparticles (CEO‐loaded NPs) on growth performance, haematological parameters and antioxidant status of white leg shrimp. Shrimps with the initial weight of 3.38 ± 0.014 g were allocated into 15 fibreglass tanks (300 L, 60 shrimps per tank) and were fed with five experimental diets containing 0 g/kg CEO (the control diet), 5 g/kg CEO, 10 g/kg CEO, 5 g/kg CEO‐NPs and 10 g/kg CEO‐NPs for 56 days. After 56 days of culture, the shrimps fed with CEO and CEO‐loaded NPs supplemented diets showed a more significant increase in growth performance (< .05) than in the control diet. Total haemocyte count (THC) value, large‐granule cells (LGC), hyaline cells (HC)%, superoxide dismutase (SOD) and Alkaline phosphatase (AKP) activity were significantly higher (< .05) in the shrimps fed with CEO and CEO‐loaded NPs supplemented diets than the shrimps fed with the control diet. Glutathione peroxidase (GPX) enzyme activities along with the glucose and cholesterol concentrations significantly decreased in the shrimps fed with the CEO and CEO‐loaded NPs supplemented diets more than those fed with the control diet. The results suggest that the dietary CEO‐loaded NPs can improve the growth performance, the health status and the antioxidant capacity of Lvannamei.  相似文献   
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