桔皮油对家兔耳(足)螨病治疗试验

用桔皮油对505只耳(足)螨病兔进行治疗,其中耳螨兔432只,耳、足螨混合感染兔73只,用药后7d病免全部冶愈,60～180d复查,未发现复发病例。离体杀螨试验,桔皮油经过5～10min将螨虫全部杀死。由此证明,桔皮油具有药效快、杀虫率高、对兔体无毒副作用等特点。     

橙皮综合利用研究进展

介绍了橙皮中有价值成分香精油、橙皮色素、果胶、橙皮苷等的提取方法以及在食品、饮料、化妆品等方面的应用.     

建设绿色食品原料基地 助推宁都脐橙产业发展

宁都地处江西南部,气候温和,雨量充沛,是赣南脐橙的主产区,2008年经农业部绿色食品办公室、中国绿色食品发展中心批准为全国绿色食品原料(脐橙)标准化生产基地,通过3 a的创建与建设,全县脐橙基地按照绿色食品原料(脐橙)标准化进行生产,产量和效益大幅度增长,推动了宁都脐橙产业的发展,实现了农民增收、农业增效和农村经济发展。     

Collection and Characterization of Citrus indica Tanaka and C. macroptera Montr.: Wild Endangered Species of Northeastern India

Citrus indica and C. macroptera are the wild endangered species of Citrus occurring in northeastern India. Surveys were undertaken in this region for ascertaining distribution, studying variability and for collection of germplasm of these two species. C. indica, an endemic species of this region, was collected from the Citrus Gene Sanctuary located in buffer zone of Nokrek Biosphere Reserve in the Garo hills of Meghalaya. In addition, a putative natural hybrid of C. indica and C. limon was collected for the first time from the south Garo hills. C. macroptera had much wider distribution and was collected from Mizoram and Meghalaya states. In Jantia hills of Meghalaya, natural populations of this species are in a highly threatened state. The two species were unevenly distributed all over the explored territory. Morphological characterization of leaves, fruits and seeds indicated the presence of sizable variability within collected accessions of these two Citrus species. Indigenous technical knowledge gathered on the use and socio-economic importance indicated commercial potential for these two species in northeastern India. However, lack of cultivation of these species and clearing of forest cover at an alarming rate has led to an urgent need to adopt complementary conservation strategies to safeguard these species and to ensure their availability for future utilization. A major emphasis on developing methods for their propagation, multiplication and regeneration in in situ and ex situ conditions is required.     

水土保持行政处罚决定执行中存在的问题及对策

水土保持行政处罚决定执行中存在的问题及对策何建华（山西省水利厅水保监督处,太原市０３０００２）李茂华（山西省寿阳县水利水保局）水土保持监督管理部门是代表国家行使水土保持管理职权的行政机关,它对造成水土流失行为的个人或单位作出的行政处罚决定,采取的一定...     

生物化学复合防腐剂在橙汁防腐保鲜中的协同增效作用

该文以天然生物防腐剂乳酸链球菌素(Nisin)、化学防腐剂山梨酸钾、乙二胺四乙酸(EDTA)以及食品抗氧化剂异Vc钠为原料，对通过复配后得到的各组复合型防腐剂在橙汁保鲜中的协同增效作用进行研究，并且与单一的防腐剂保鲜效果进行比较，得出一组适合在橙汁中使用的高效复合型防腐剂。结果表明，上述各种抑菌剂单独使用时均不能完全抑制橙汁中微生物的生长；正交试验结果表明，当选择0.05 g/kg Nisin、0.1 g/kg山梨酸钾、0.01 g/kg异Vc钠、0.03 g/kg EDTA作为复配型抑菌剂的最佳添加配比时，能显著地抑制橙汁中微生物的生长，第14、17、21 d对菌落总数的抑制率分别达到99.9%、99.9%和99.6%，其抑菌效果显著优于单一防腐剂的抑菌效果。因此，Nisin与三者复合使用时具有协同增效性，该复合防腐剂添加至橙汁中可起到良好的防腐保鲜效果。     

芦柑皮果胶提取工艺的研究

以烘干芦柑皮的粉末作为原料,采用酸水解乙醇沉淀法提取粗果胶.在参考料液比、pH值、浸提温度、浸提时间4个单因素提取效果的基础上,进行了L9(34)正交试验.优化试验以及方差分析结果表明,芦柑皮果胶提取的最佳工艺条件为:料液比1:10,pH值2.0,浸提温度85℃,浸提时间60min.在上述条件下,制备的果胶样品颜色呈乳...     

RP-HPLC测定夏橙中Vc含量

建立了一种利用反相高效液相色谱测定橙橘中Vc含量的方法。采用Agilent1100高效液相色谱仪,Zorbaxeclipse XDB C18150.0 mm×4.6 mmi.d色谱柱,以0.05 mol/L磷酸二氢钾缓冲溶液-甲醇(95∶5)作为流动相,流速1.00 ml/min,于265 nm波长检测。在一定浓度范围内,Vc的峰面积与其浓度呈良好的线性关系(相关系数为0.999 8),相对标准偏差为0.22%;方法回收率为91.6%~104.1%。     

Application of Wavelet Transform in the Prediction of Navel Orange Vitamin C Content by Near-Infrared Spectroscopy

This study was to search for an approach for rapid measurement of orange vitamin C （Vc） content. By using different decomposing levels of Daubechies 3 wavelet transform, the near-infrared spectra signals obtained from intact fruits of 100 navel orange samples were denoised, and the results of the predicted Vc contents for the corresponding samples determined by the reconstructed spectra after denoising were validated by means of PLS-CV （partial least squared-cross validation）. It was shown that the prediction effects verified by PLS-CV analysis varied when different wavelet transform decomposing levels were employed. At the wavelet decomposing level 4, the best prediction effect was obtained, with the correlation coefficient R between the prediction and true values being 0.9574 and the expected variance RMSECV being as low as 3.9 mg 100 g^-1. Furthermore, the 11 different approaches for the pretreatment of the near-infrared spectrum were compared. It was found that the calibration model established by PLS using spectra pretreated by wavelet transform denoising provided the best prediction for Vc content, exhibiting the highest correlation between the prediction and true values by cross validation. In conclusion, the near infrared spectral model denoised by means of wavelet transform can be used for accurate, rapid, and nondestructive quantitative analysis on navel orange Vc content.     

广西贺州市脐橙种植气候区划

与国内外脐橙优产区相比,贺州市热量条件对脐橙生产更具优势。但复杂的地形地貌使市内各地在湿度、最高气温等气候要素差异较大,影响当地脐橙产量及品质。通过分析贺州市气候特点,结合脐橙生长发育对气候条件要求,确定了贺州市脐橙适宜种植气候指标,在GIS技术下绘制出贺州市脐橙适宜种植气候区划专题图。通过对专题图中的最适宜、适宜、次适宜、不适宜区气候区域气候论述,为贺州市脐橙生产的优化布局提供气候依据。