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作为全国五大淡水湖之一的巢湖素为世人所关注,特别是其成因及名称来源,更是历代史地学者研究和争鸣的议题."陷巢州长庐州"的传说在江淮民间衍流千年,并进入多种文艺作品和史志典籍,近些年来又频传湖滨湖底发现商陶周皿秦砖汉瓦和古城遗址,"陷巢州"话题再度成为媒体"新闻热点".本文就巢湖名称及"陷巢州"传说作了系统而缜密的考证、疏误与辨正,对搞清巢湖来历,勘核地域文史,都具有较高的学术意义和资料价值. 相似文献
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清代民法为任何一个对法制史有所涉猎的人所熟悉,但人们大都是从清代官方的表达中对它加以了解的.美国学者黄宗智在<清代法律、社会与文化:民法的表达与实践>一书中,从几个方面论证了清代法律制度的实际运作与清代官方表达之间有很大的差异,即实践与表达的背离.这使读者们不得不努力追忆以往所读过的清代官方表达与前人著说,与黄先生的观点做一番对照,以探求历史的真迹. 相似文献
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电影<黄金时代>是美国历史上最优秀的影片之一.它曾荣获第十九届奥斯卡最佳影片、最佳改编剧本、最佳导演、最佳男主角、最佳男配角、最佳剪辑、最佳音乐、特别奖等八项大奖.该片由美国高德温影业公司于1946年发行,雷德.马奇、达纳.安德鲁斯和哈罗特.拉塞主演,威廉·惠勒执导.威廉·惠勒是美国早期大导演,曾三次荣获奥斯卡最佳导演奖,其作品有<忠勇之家>、<宾虚>、<罗马假日>、<咆哮山庄>等名片. 相似文献
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赵学勉 《中学语文园地(初中版)》2008,(4):7-8
<鸿门宴>在塑造人物形象方面所采用的一个相当高明的方法,那就是通过对比、映衬、烘托的手法来表现人物性格.除了人物之间,比如,主帅与主帅,谋士与谋士,大将与大将,内奸与内奸的对比、映衬外,在主帅与谋士的关系上也形成鲜明的对比.同是很重要的谋士,在足智多谋、睿智机敏方面,范增和张良难分伯仲,甚至范增更显得老奸巨猾.但为什么项羽与范增配合不好,而刘邦与张良却配合得天衣无缝?要回答这个问题,应从每组人各自的身份、地位、性格和谋划的方式几方面来考虑.…… 相似文献
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近现代群育观念的复兴及其启示 总被引：1，自引：0，他引：1
近代以降,严复、梁启超等人"群"观念的提出,旨在唤起国人的"合群"意识,以达到保国保种的目的.孙中山、蔡元培等人的教育主张奠定了民国时期群育列入教育方针的基础,梅贻琦、罗輈重、潘光旦等人的教育主张丰富了群育思想.当前,德育含义太泛,实际上是弱化了德育,如何在新的时代背景下,将中国传统观念中的"群"和中国近代提出的群育思想继承发扬,值得反思. 相似文献
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刘奕云 《咸阳师范学院学报》2008,23(1):43-45
春秋时期,宋、齐、楚鹿上会盟之地望,历有鹿城、鹿邑、阜南、太和四说.本文通过近年平舆县新发现汉汝南郡封泥"原蔍侯相"、"原蔍长印",及阜南县阮城出土的楚玺"专室之玺"等文物,结合历史文献,认为春秋"鹿上"本名为"蔍上",东汉置原蔍县、侯国,其地在今阜南县阮城. 相似文献
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新时期大学辅导员工作之我见 总被引：1，自引：0，他引：1
新的历史时期,高校学生辅导员工作面临的形势和任务发生了深刻变化.辅导员工作要顺应时代的发展、形势的变化,做到与时俱进,应着力解决四个方面的问题:更新观念,掌握本领,当好朋友,作好表率,只有这样才能切实担负起教书育人的伟大使命. 相似文献
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舒畅 《安阳师范学院学报》2005,(4):150-151
音乐作为人类文化的一个种类,必然与文化的各个方面紧密联系.各民族的音乐是在自然环境、社会环境、宗教、语言的关联中得以产生和发展的. 相似文献
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Zinc (Zn) deficiency in animals became of interest until the 1950s. In this paper, progresses in researches on physi-ology of Zn deficiency in animals, phytate effect on bioavailability of Zn, and role of phytase in healing Zn deficiency of animals were reviewed. Several studies demonstrated that Zn is recycled via the pancreas; the problem of Zn deficiency was controlled by Zn homeostasis. The endogenous secretion of Zn is considered as an important factor influencing Zn deficiency, and the critical molar ratio is 10. Phytate (inositol hexaphosphate) constituted up to 90% of the organically bound phosphorus in seeds. Great improvement has been made in recent years on isolating and measuring phytate, and its structure is clear. Phytate is considered to reduce Zn bioavailability in animal. Phytase is the enzyme that hydrolyzes phytate and is present in yeast, rye bran, wheat bran, barley, triticale, and many bacteria and fungi. Zinc nutrition and bioavailability can be enhanced by addition of phytase to animal feeds. Therefore, using phytase as supplements, the most prevalent Zn deficiency in animals may be effectively corrected without the mining and smelting of several tons of zinc daily needed to correct this deficiency by fortification worldwide. 相似文献
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本文以含 Ca~(2+)、Mg~(2+)的溶液为淋洗液,以 Fe(Ⅲ)—磺基水杨酸为柱后衍生体系,在国产分离柱上分离了磷酸与植酸。利用 Ca~(2+)、Mg~(2+)与植酸的络合作用缩短了植酸的保留时间,使植酸可在低酸度(PH=4)下被洗脱,实现了植酸的快速离子色谱分析。利用此法,测定大豆样品中植酸的含量,得到满意的结果,本法比文献已有的方法更简便. 相似文献
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为给冬小麦高产提供合理施用磷肥的科学依据,采用田间试验法,以容城轻壤质潮土为研究对象,对农田土壤速效磷的养分状况及冬小麦田间试验进行分析,探讨了土壤的供肥能力。结果表明,容城土壤含磷水平较高,高、中水平占60%之多,但差异性较大,冬小麦土壤磷素贡献率高、中、低产田分别达到82.37%9、0.36%和84.82%,土壤的供磷能力分别为67.646、3.75和57.11kg/hm2,推算出了高、中、低产田冬小麦经济最佳施肥量分别为1191、11和109kg/hm2。 相似文献
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用清水及种衣剂处理分别作对照 ,通过在小麦种衣剂中加入尿素、KH2 PO4和腐殖酸的试验 ,结果表明 :种衣剂中加入尿素和KH2 PO4增产效果显著 ,而种衣剂中加入腐殖酸却明显减产。 相似文献
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Zou LK Wang HN Pan X Tian GB Xie ZW Wu Q Chen H Xie T Yang ZR 《Journal of Zhejiang University. Science. B》2008,9(7):536-545
The phyAm gene encoding acid phytase and optimized neutral phytase phyCs gene were inserted into expression vector pPIC9K in correct orientation and transformed into Pichiapastoris in order to expand the pH profile of phytase and decrease the cost of production. The fusion phytase phyAm-phyCs gene was successfully overexpressed in P. pastoris as an active and ex-tracellular phytase. The yield of total extracellular fusion phytase activity is (25.4±0.53) U/ml at the flask scale and (159.1±2.92) U/ml for high cell-density fermentation, respectively. Purified fusion phytase exhibits an optimal temperature at 55 ℃ and an optimal pH at 5.5～6.0 and its relative activity remains at a relatively high level of above 70% in the range of pH 2.0 to 7.0. About 51% to 63% of its original activity remains after incubation at 75 ℃ to 95 ℃ for 10 min. Due to heavy glycosylation, the expressed fusion phytase shows a broad and diffuse band in SDS-PAGE (sodium dodecyl sulfate-polyacrylamide gel electrophoresis). After deglycosylation by endoglycosidase H (EndoHf), the enzyme has an apparent molecular size of 95 kDa. The characterization of the fusion phytase was compared with those of phyCs and phyAm. 相似文献
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消解条件对植酸钙中磷含量测定结果的影响 总被引：1，自引：0，他引：1
植酸钙有很广泛的用途,并具有很重要的生理功能.通过对植酸钙的消解剂、消解剂的用量及消解时间等因素进行优选,探索出植酸磷含量的测定过程消解的最佳条件,为植酸磷含量的准确测定提供更可靠的方法. 相似文献
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刘保河 《安徽科技学院学报》1990,(1)
本文分析了冬小麦精密播种在小麦高产栽培技术中的意义。使用小麦精密播种机进行播种,能够保证冬小麦精密播种的农艺要求而获得高产。并且论述了小麦精密播种机在农机和农艺结合方面的工作原理。 相似文献
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本文研究了盐胁迫下不同浓度水杨酸(SA)对小麦种子萌发及幼苗生长的影响。结果表明:5 mmol/LNaCl胁迫下,小麦种子发芽率降低,根伸长、芽伸长受到抑制;小麦幼苗叶绿素含量、超氧化物歧化酶(SOD)活性降低,膜脂过氧化作用产物丙二醛(MDA)积累;0.1-1mmol/LSA处理提高了盐胁迫下小麦种子发芽率,促进小麦幼苗生长,提高小麦幼苗叶绿素含量、超氧化物歧化酶的活性,抑制MDA积累,缓解盐胁迫对小麦幼苗的伤害,并表现出浓度效应。 相似文献
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Phosphate-accumulating aerobic granules cultivated in a sequencing batch reactor were composed of inner rod-shaped bacteria aggregates and outer twining filamentous bacteria. The influence of two-month storage under different conditions on the storage and subsequent reactivation performance of aerobic granules was investigated. After two-month storage the granules sealed at 4 ℃ in distilled water or normal saline (named granules A and granules B, respectively) could maintain their characteristics as before, while the granules idled in the reactor at room temperature (named granules C) exhibited decreased properties. During reactivation, granules A and granules B presented almost identical recovery performance, faster than granules C, in terms of phosphorus removal efficiency, mixed liquor suspended solids (MLSS), phosphate release and accumulating ability. The results suggest that hermetical storage at low temperature promoted the maintenance of the granular properties and the reviving behaviors of phosphateaccumulating aerobic granules, and storage medium had little influence on the storage and recovery performance. 相似文献
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Xin-zheng Nie Sha Chen Xiao-xu Zhang Bin-yang Dai Li-chun Qian 《Journal of Zhejiang University. Science. B》2017,18(10):886-896
A feeding trial was conducted for nine weeks to investigate the effects of partially replacing Ca(H2PO4)2 with neutral phytase on the growth performance, phosphorus utilization, nutrient digestibility, serum biochemical parameters, bone and carcass mineral composition, and digestive-enzyme-specific activity in crucian carp (Carassius auratus). The diets prepared with 0.8%, 0%, and 1.8% Ca(H2PO4)2 (1%=1 g/100 g) supplements were regarded as the P1E0, negative control (NC), and positive control (PC) groups, respectively; the other three experimental diets were prepared with the addition of 200, 300, and 500 U/kg of neutral phytase, respectively, based on the P1E0 group. Three hundred and eighty-four fish ((1.50±0.01) g) were randomly distributed in the six treatments with four replicates each. The fish were initially fed with 2%–3% diets of their body weight per day, with feeding twice daily (08:00 and 16:00), under a 12-h light/12-h dark cycle at the temperature of (27.56±0.89) °C. The results showed that supplemental phytase at different levels in the diet improved the final body weight, average daily gain, feed conversion ratio, phosphorus utilization, and protein efficiency ratio of crucian carp (P<0.05). Phytase supplementation increased the mineral content in serum (P), bone (P, Ca), and carcass (P, Ca, Zn, Na, and Mg) (P<0.05); the trypsin and chymotrypsin activity soared when fed with the phytase-supplemented diets (P<0.05). We may conclude that supplemental dietary neutral phytase improved the growth performance, phosphorus utilization as well as nutrient utilization in crucian carp, and it can be considered an important nutritional replacement for Ca(H2PO4)2. 相似文献