保留括约肌术治疗高位复杂性肛瘘的临床观察

目的观察保留括约肌术治疗高位肛瘘的临床效果。方法 60例高位肛瘘患者随机分为治疗组和对照组,治疗组采用保留括约肌术治疗,对照组采用挂线治疗,随访观察两组的治疗效果。结果治疗组患者疼痛时间、创面愈合时间及瘢痕面积明显少于对照组(P<0.05),而肛门功能正常和满意度明显高于对照组(P<0.05)。结论保留括约肌术治疗高位肛瘘的临床效果较好。     

超干处理对大叶白麻种子活力的影响研究

本实验采用硅胶干燥法对大叶白麻种子进行超干保存,将种子含水量降至5%以下,能显著提高抗老化能力。在同等老化处理条件下,对照种子发芽率和活力指数已大幅下降,而超干种子的发芽率和活力指数所受影响很小。对超干种子的电导率、脱氢酶活性的研究结果表明,含水量为3.37%的超干种子细胞膜系统的完整性良好。回湿处理是保证超干种子活力的关键因素,采用室内回湿24h+饱和水蒸气回湿24h可以显著提高大叶白麻超干种子的活力。研究结果表明,利用超干技术保存大叶白麻种子是可行的。     

中草药复配液在脐橙保鲜中的应用研究

以赣南脐橙为试材,研究了肉桂、丁香、丹皮、细辛、五倍子五种中草药提取液(浓度为1 g/mL)中的任意三种以1∶1∶1比例形成的10种复配液对意大利青霉和指状青霉的抑制效果以及效果最佳的复配液对脐橙的保鲜效果。结果表明,复配液CM-7(丁香、细辛、丹皮)对指状青霉和意大利青霉的抑菌圈直径分别为40.97 mm和39.03 mm,抑菌效果最好。对脐橙保鲜效果表明,与对照组相比,在贮藏中后期(40～90 d),CM-7处理降低了果实的腐烂率和失重率,延缓了VC和总糖含量的降解,保持了果实良好的营养品质。     

甜玉米保鲜与加工技术研究进展

甜玉米作为新型果蔬食品,近年来在我国得到迅速发展。本文对甜玉米的品质特性、适宜采收期、贮藏、加工技术及应用等方面的研究现状和发展趋势进行了综述,可为甜玉米的深入研究和进一步开发利用提供参考。     

植物精油在果蔬保鲜中的应用

植物精油多提取于香辛料及中草药植物的花、叶、茎、根或果实,具有显著的抑菌效果,且安全无毒,是一种理想的天然果蔬保鲜剂。通过对植物精油的抑菌活性、果蔬防腐保鲜的作用及其机理等方面进行综述及分析可知,植物精油的开发利用必将迎来更加广阔的前景。     

不同商品化处理及保鲜膜包装对芦蒿冷藏效果的研究

芦蒿是以嫩茎供食的蔬菜。本试验以青杆型芦蒿为材料,研究带叶、去叶、鲜切三种商品化处理方式及0.02、0.05 mm厚度的PE膜、微孔膜三种保鲜膜包装对其(2±0.5)℃冷藏保鲜效果的影响。结果表明,去叶处理在减少VC等营养物质损耗、延缓采后纤维化及维持感官品质等方面优于带叶和鲜切处理;同时芦蒿具有较好的CO2耐受性,用厚度0.05 mm PE膜包装的保鲜效果优于另外两种保鲜膜包装。     

Establishment of reliable methods of in vitro pollen germination and pollen preservation of Brassica rapa (syn. B. campestris)

A simple and reliable method for evaluating the viability of Brassica pollen was established in which the in vitro germination rate of pollen was adopted as the index of the viability of pollen grains. Pollen grains were preincubated in an atmosphere in which the relative humidity (RH) was fixed to 52% or 66% at 20 °C for 5 hours. They were cultured for 16 hours at 25 °C in a liquid Kwack's medium (1964) supplemented with 20% sucrose, and the pH was adjusted to 8.0. They were then observed under a microscope and the number of germinating and unchanged pollen grains were counted. The germination rate of pollen was improved and stabilized by preincubation and the use of a high pH medium. More than 90% of the freshly harvested pollen grains of Brassica rapa (syn. B. campestris) germinated constantly in these conditions Undehisced anthers were collected from flowers at anthesis and dehydrated by incubation at 20 °C for 16–24 hours in an atmosphere where the RH was fixed to 15% or 32%. They were put into a plastic vial and preserved in a freezer at -20 °C. The germination percentage of the preserved pollen was scored at intervals during preservation. The germination rate of the pollen grains preserved at -20°C for 1 year was higher than 50% and the pollen proved to be efficient for seed set. Most of the seeds germinated normally. This revised version was published online in August 2006 with corrections to the Cover Date.     

枇杷采后生理变化与贮藏保鲜技术

阐述枇杷采后主要生理变化,并对采后贮藏保鲜技术处理作逐一介绍.     

国内外果蔬生物保鲜方法的研究现状与展望

概述果蔬生物保鲜方法的种类、原理和技术,同时对现阶段生物保鲜技术在果蔬贮藏保鲜中的应用进行综述,最后对生物保鲜技术存在的问题和未来研究方向进行展望.     

国内外果蔬鲜切加工及保鲜技术研究现状

随着工作节奏的加快,方便快捷食品需求的增强,鲜切加工产品越来越受到关注。阐述了鲜切产品的加工过程、原料来源及选择,清洗、去皮、切分、护色、包装和贮藏等各项技术,论述和比较了鲜切产品的保鲜技术包括冷藏保鲜、保鲜剂保鲜、MAP保鲜及冷杀菌保鲜等,分析了加工过程中需要注意的问题,最后对鲜切加工技术的发展提出了展望。