江西上栗楚山水泥用灰岩矿矿床地质特征及找矿前景

楚山水泥用灰岩矿位于钦杭结合带萍乡—乐平坳陷带的北西端,是赣西地区新发现的一处大型水泥用灰岩矿。该矿床规模大、质量好。含矿岩石主要为白云质灰岩、含燧石结核灰岩、生物屑泥晶灰岩、微晶灰岩,其成因属海相化学—生物沉积型矿床。在系统分析该矿床成矿地质背景、矿床地质特征及矿床成因的基础,对矿区外围进行了找矿前景评价,圈定了2个成矿远景区。

江西宁都官齐坑地区瓷土、瓷石矿地质特征与矿床成因

本文研究了官齐坑瓷土和瓷石矿在矿体形态、矿石质量等方面的异同,指出官齐坑地区瓷土、瓷石矿原岩为正长花岗岩脉,瓷土矿的厚度相比瓷石矿变化更大;具有更低的Na2O含量、更高的K2O/Na2O比值;瓷土矿的稀土配分模式为平直型,具有明显的Eu正异常特征。烧制试验表明,瓷土、瓷石矿可以作为制作日用陶瓷的配料和建筑陶瓷原料。矿床的成因与岩浆作用、表生作用及地貌作用等有关,涉及成岩过程、风化过程、元素富集过程等。

《大学生创新实践》课程内容和组织的教学改革实践

在大众创业、万众创新的现时代,高校的创新创业教育对其所输出的专业人才的创新实践能力培养尤为迫切。《大学生创新实践》课程是激发大学生创新意识和创造力,训练创新实践能力的重要培养环节。论文主要介绍扬州大学动物科学与技术学院《大学生创新实践》必修课程的教学内容设置、小班教学组织、教学效果考核等的探索,以期为高校创新创业教育的发展提供一些参考。

香蕉副产物的饲用价值及其在反刍动物生产中的应用前景

香蕉副产物是收获新鲜果实后残留的茎叶和果皮等,其营养价值丰富。由于缺乏深入的研究,每年产生的近百万吨的香蕉副产物一直没有被很好地开发与利用,造成极大的资源浪费。将香蕉副产物饲料化,不仅可以解决资源浪费,减少环境污染,同时还能缓解人畜争粮的矛盾。本文主要对香蕉副产物的生产现状、营养价值以及香蕉资源在反刍动物生产中的利用前景进行论述,旨在为今后香蕉茎叶及其果皮在反刍动物生产中的合理应用提供参考。

多囊卵巢综合征患者阴道微生态临床分析

目的对比初诊多囊卵巢综合征(PCOS)患者与健康妇女阴道微生态结果,探讨其PCOS患者发病病因及诊疗思路。方法选择80例初诊PCOS患者作为研究组,同期选取体检健康组80例对照组。取两组研究对象阴道分泌物检测滴虫、真菌、菌群密集度、白细胞、优势菌、Nugent评分及AV评分情况。比较两组上述阴道微生态指标,分析两组阴道微生态是否失调。结果两组受试者滴虫检出率均为零,两组受试者优势菌、真菌检出率、AV评分、Nugent评分及阴道感染情况比较,差异有统计学意义(P<0.05)。两组受试者白细胞、菌群密集度比较,差异均无统计学意义(P>0.05)。结论PCOS患者阴道菌群构成与正常阴道微生态环境有明显差异,为治疗PCOS的一种新方案以及动态观察PCOS患者微生态状况可作为评估POCS患者治疗后的一个重要指标。

Effects of formic acid and corn flour supplementation of banana pseudostem silages on nutritional quality of silage,growth,digestion,rumen fermentation and cellulolytic bacterial community of Nubian black goats

The objective of this study was to evaluate the effects of adding formic acid and corn flour supplementation to banana pseudostem silages on the nutritional quality of these silages,growth,digestion,rumen fermentation and cellulolytic bacterial community of Nubian black goats fed these silages.Banana pseudostem silage was prepared either conventionally without any additives(CON)or mixed with 0.6% formic acid(F),10% corn flour(C),or both(F+C).Four experimental diets containing 40% of the corresponding silages were designed with roughage to concentrate ratio of 50:50(dry matter(DM)basis).A total of 48 Nubian black castrated goats(body weight(BW),(22.64±1.82)kg;4-mon-old)were randomized into one of the four treatment groups with 12 replicates of one castrated goat per replicate for each treatment in a completely randomized design.Each group was fed on one of the four experimental diets for 40 days.A factorial arrangement of treatments of 2(formic acid levels:0 and 0.6%)×2(corn flour:0 and 10%)was adopted.Formic acid supplementation increased(P<0.05)average daily gain,as well as lactic acid,propionate and butyric acid and water-soluble carbohydrate concentrations,but decreased(P<0.05)the feed conversion rate,pH value,acetate/propionate ratio,and butyric acid concentration relative to the CON group.Corn flour supplementation increased(P<0.05)the apparent digestibility of crude protein,neutral detergent fiber,and non-fibrous carbohydrate and Fibrobacter succinogenes,Ruminococcus albus,and Butyrivibrio fibrisolvens populations,but decreased(P<0.05)the Ruminococcus flavefaciens population relative to the CON group.There were no F×C treatment interactions(P>0.05)for any of the other indices except for the apparent digestibility of non-fibrous carbohydrate(NFC)(P<0.05).The results demonstrated that adding 0.6% formic acid and 10% corn flour supplementation to banana pseudostem silages improved the nutritional quality of these silages and enhanced the growth performance of Nubian black castrated goats by improving apparent nutrient digestibility,and regulating ruminal fermentation and bacteria populations.

The Preliminary Report on Rumen Protozoa Grazing Rate on Bacteria with a Fluorescence-Labeled Technique

Studies on the bacterial predation rate by rumen protozoa were carried out under laboratory conditions using a technique of fluorescence-labeled bacteria （FLB）. Four Xuhuai goats were used in this experiment to obtain rumen protozoa and bacteria. Two groups were designed as follows： One group was the whole bacteria which were labeled using fluorescence through removing free bacteria from rumen fluid （WFLB）; the other group was the bacteria which were labeled using fluorescence without removing free bacteria from rumen fluid （FLB）. The result indicated that the bacterial predation rates of rumen protozoa was 398.4 cells/（cell h） for the group WFLB, 230.4 cells/（cell h） for the group FLB, when the corresponding values expressed as bacteria-N, they were 2.15 pg N/（cell h） for the group WFLB, and 1.24 pg N/（cell h） for the group FLB, respectively. Extrapolating the assimilation quantity of nitrogen by ciliates on bacteria of Xuhuai goat, there were 103.2 mg N/（d capita） for the group WFLB, and 59.5 mg N/（d capita） for the group FLB, respectively. It was estimated that protein losses due to microbial recycling were 0.645 g pro/（d capita） for the group WFLB and 0.372 g pro/（d capita） for the group FLB, respectively. In addition, the fluorescence-labeled technique would be a potential assay for the determination of bacterial predation rate by rumen protozoa.

浅析集水托盘和持水改良剂在黄南州工程造林上的应用研究

本文主要通过对比常规造林、使用集水托盘和土壤高效持水改良剂造林在黄南州干旱区造林绿化上的应用效果,来阐述集水托盘和土壤高效持水改良剂的优势。研究显示:应用集水托盘和土壤高效持水改良剂在干旱地区造林可以显著提高苗木成活率,有效提高土壤温度和水分含量,明显增强土壤保墒效果,同时还可以降低营林成本。因此,应用集水托盘和使用土壤高效持水改良剂比常规造林效果明显,具有良好的示范作用。

赣东北地区山门冲金矿区地质特征及找矿前景

山门冲金矿区位于赣东北乐平市境内,是钦杭成矿带赣东北断裂带的一部分。该区成矿地质背景良好,金成矿类型多样。该区成矿物质来源主要为双桥山群地层,赋存在北东向、北北东向韧性剪切带中。破碎带主要有糜棱岩、碎裂岩组成,主要矿化蚀变为黄铁矿化、硅化、绢云母化。本文通过对山门冲金矿的矿化特征及区域围岩金含量丰度的讨论,预测该区有较大的成矿潜力和找矿前景,为下一步地质工作提供基础和参考。