早期宫颈癌部分子宫照射的物理剂量学研究

目的探索宫颈癌根治性同期放化疗中部分子宫照射对减少盆腔正常脏器剂量的意义。方法选取2014年10月至2016年10月在汕头大学医学院附属肿瘤医院接受根治性放化疗的20例宫颈癌患者,为每个患者设计2套放疗计划:(1)全子宫照射:临床靶区(CTV)包括完整子宫;(2)部分子宫照射:CTV包括肿瘤靶区(GTV)以外10mm的子宫组织。比较每个患者2组放疗计划的参数和盆腔正常器官受照射剂量。结果部分子宫照射和全子宫照射适形度和均匀度差异无统计学意义;部分子宫照射的计划靶区(PTV)体积为(1 065±134)cm~3,小于全子宫照射的PTV体积(1 141±133)cm~3(P=0.00);部分子宫照射能减少部分盆腔脏器受照剂量:部分子宫照射膀胱V45=(27±9)%,全子宫照射V45=(32±11)%(P=0.01);部分子宫照射直肠V40=(84±9)%,全子宫照射直肠V40=(86±9)%(P=0.01);部分子宫照射小肠V45=(76±53)cm~3,全子宫照射小肠V45=(79±56)cm~3(P=0.03)。结论部分子宫照射能减少PTV体积,并减少部分盆腔正常器官受照射剂量,但所减少的绝对体积较小,临床意义不大。广东省科技厅科技计划项目(2016A020215188);;汕头市医疗科技计划项目(汕府科[2015]123号

The Effects of NS-lactobacillus Complex on Productivity Performance, Plasma Biochemical Indexes and Dilarrhea Rate in Weaned Piglets

选择二元杂交(杜/长)的(28)日龄断奶仔猪90头,平均断奶体重(8.99±1.60)kg,按体重和性别分成3个处理组,每处理3个重复。A组为对照组,饲喂玉米、豆粕基础日粮;B组为添加0.2%(m/m)NS复合乳酸菌制剂到基础日粮中;C组为添加0.2%(m/m)金霉素、0.025%(m/m)阿莫西林和0.012 5%(m/m)的支原净。试验分为3个阶段:试验共30 d,研究微生态制剂NS复合乳酸菌对断奶仔猪生产性能、血液生化指标和减少腹泻率的影响。结果表明,NS复合乳酸菌能显著提高断奶仔猪的生产性能,平均末重、平均增重、平均日增重分别比A组高9.12%,7.64%和7.67%,差异显著(P<0.05);料肉比降低9.70%,差异显著(P<0.05);有效降低断奶仔猪的腹泻率50%,差异极显著(P<0.01);B组的血糖(GLU)含量比A组高20%、超氧化物歧化酶(SOD)活性高10.9%,差异显著(P<0.05),对增强机体抗氧化功能,减少应激作用具有良好效果

Effect of salinity on microbial densities of soil in the dilution plate technique applied in mangrove areas

作者简介:张瑜斌(1970～) ,男,湖南郴州人,博士,副教授,主要从事海洋微生物学与海洋生态学研究. E2mail: zhangyb@gdou. edu. cn 通讯作者Corresponding author. E2mail: linpeng@jingxian. xmu. edu. cn[中文文摘]在使用稀释平板法分离潮间带红树林及其对照光滩土壤微生物以及计数时,多数情况下使用陈海水制作培养基和稀释水,很少考虑培养基和稀释水的盐度对最终计数结果的影响。使用稀释平板法研究了盐度对福建九龙江口红树林区与深圳福田红树林保护区土壤微生物平板计数的影响,结果表明培养基与稀释水盐度对微生物数量有明显的影响。统计分析显示细菌的海水稀释效果优于淡水,而放线菌与真菌则刚好相反(P<0.05,一个例外)。海水不适合配制红树林区土壤微生物平板计数的培养基,从0~35,高盐度的平板培养基会降低微生物的数量,尤其是放线菌的数量,尽管培养基的盐度对真菌影响无规律,但细菌数量在低盐度时比在高盐度和不加氯化钠时要多。根据盐度效应,提出了稀释平板技术应用于潮间带的红树林及其相应光滩时的优化方法,认为细菌应该用海水作无菌稀释水,而放线菌和真菌则应用淡水作稀释水;包括光滩在内的红树林区土壤微生物分离与计数的培养基宜控制较低盐度范围。[英文文摘]When the soilmicrobial densities are determined in mangroves and correspondingmudflat at the same tidal level by the dilution p late method, the agarmedia and dilution water are generallymade up of aged seawater in most cases, and effects of salinity in agar media and dilution water on the enumeration of microbes is seldom taken into consideration. The effects of salinity on soil microbial counting from the samples in mangrove areas in Jiulongjiang Estuary of Fujian, and Futian Mangrove Nature Reserve of Shenzhen, China, were tested by dilution p late technique. The results showed that the soil microbial densities in mangroves and mudflat were significantly influenced by the salinity of dilution water and agarmedia. For the bacteria, the seawater served as sterilized dilution water was significantly ( P < 0. 05) more benefic to the enumeration on the p lates than the freshwater, but in reverse for the actinomycetes and fungi. The increasing salinity of media within 35 significantly decreased microbial colonies on the p lates, especially for the actinomycetes, in sp ite of the fact that the effect of salinity ofmedia on fungal numberswas not indefinite. The bacterial colonieswere more abundant on the agar p lates with low salinity than with high salinity or without any NaCl. It was p roposed that some methodological imp rovements were needed when the dilution p late technique was app lied to microbial counting in the samp les of mangrove forest and mudflat at the same tidal level in inter2tidal zone. The sterilized dilution water should be p repared with seawater for the bacteria, but with freshwater or low saline water for the actinomycetes and fungi. The salinity of agarmedia should be low for the microbial isolation and enumeration of soil samples from the mangrove areas including mudflats.国家自然科学基金资助项目(30270272

Effects of NS-Lactobacillus Complex on Immunity Levels in Weaning Piglets

选择二元杂交（杜／长）20日龄断奶仔猪90头，平均断奶体重8．99kg±1．60kg，按体重和性别分成3个处理组，每处理3个重复。A组为对照组，饲喂玉米、豆粕基础日粮；B组为基础日粮添加NS复合乳酸茵组2g／kg；C组为基础日粮添加抗生素组（2g／kg金霉素、0．25g／kg阿莫西林和0．125g／kg的支原净）。试验共30d，研究微生态制剂NS复合乳酸茵对断奶仔猪体液免疫和细胞免疫水平的影响。结果表明，试验30d时，NS复合乳酸茵组与对照组相比，断奶仔猪血清中的IgM含量和干扰素INF-7的含量分别高出19．70／4和10．2％，猪瘟病毒抗体阳性率高出33．3％，差异显著（P〈0．05）；与NS复合乳酸茵组相比，抗生素组仔猪外周血T细胞CD8^＋亚群的比例要高出79．2％，差异显著（P〈0．05）。NS复合乳酸茵制荆对加强仔猪体液免疫，维持仔猪的猪瘟、伪狂犬病毒抗体水平和促进机体细胞免疫具有良好效果

The Effects of NS-lactobacillus Complex on Productivity Performance, Plasma Biochemical Indexes and Dilarrhea Rate in Weaned Piglets

选择二元杂交(杜/长)的(28)日龄断奶仔猪90头,平均断奶体重(8.99&plusmn;1.60)kg,按体重和性别分成3个处理组,每处理3个重复。A组为对照组,饲喂玉米、豆粕基础日粮;B组为添加0.2%(m/m)NS复合乳酸菌制剂到基础日粮中;C组为添加0.2%(m/m)金霉素、0.025%(m/m)阿莫西林和0.012 5%(m/m)的支原净。试验分为3个阶段:试验共30 d,研究微生态制剂NS复合乳酸菌对断奶仔猪生产性能、血液生化指标和减少腹泻率的影响。结果表明,NS复合乳酸菌能显著提高断奶仔猪的生产性能,平均末重、平均增重、平均日增重分别比A组高9.12%,7.64%和7.67%,差异显著(P〈0.05);料肉比降低9.70%,差异显著(P〈0.05);有效降低断奶仔猪的腹泻率50%,差异极显著(P〈0.01);B组的血糖(GLU)含量比A组高20%、超氧化物歧化酶(SOD)活性高10.9%,差异显著(P〈0.05),对增强机体抗氧化功能,减少应激作用具有良好效果。</p

Effects of NS-Lactobacillus Complex on Immunity Levels in Weaning Piglets

选择二元杂交(杜/长)20日龄断奶仔猪90头,平均断奶体重8.99kg±1.60kg,按体重和性别分成3个处理组,每处理3个重复。A组为对照组,饲喂玉米、豆粕基础日粮;B组为基础日粮添加NS复合乳酸菌组2g/kg;C组为基础日粮添加抗生素组(2g/kg金霉素、0.25g/kg阿莫西林和0.125g/kg的支原净)。试验共30d,研究微生态制剂NS复合乳酸菌对断奶仔猪体液免疫和细胞免疫水平的影响。结果表明,试验30d时,NS复合乳酸菌组与对照组相比,断奶仔猪血清中的IgM含量和干扰素INF-γ的含量分别高出19.7%和10.2%,猪瘟病毒抗体阳性率高出33.3%,差异显著(P<0.05)。NS复合乳酸菌制剂对加强仔猪体液免疫,维持仔猪的猪瘟、伪狂犬病毒抗体水平和促进机体细胞免疫具有良好效果

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel