转角法施工镀锌高强螺栓关键技术

常州现代传媒中心主塔楼屋顶高88 m的钢塔(塔桅钢结构)设计工艺复杂,施工难度极大,所有钢构件均进行热浸锌防腐处理,采用8.8级热浸锌高强螺栓连接。考虑到钢结构拼接节点热浸锌高强螺栓的安装质量直接影响塔桅钢结构的安全和稳定,通过对热浸锌高强螺栓施工工艺进行反复论证、试验,最终确定采用转角法施工热浸锌高强螺栓,取得了理想的施工效果,确保了工程施工质量。     

上海动物园非洲企鹅种群线粒体DNA序列分析及遗传管理建议

非洲企鹅(Spheniscus demersus)是一种濒危海鸟,也是动物园展出的重要物种。上海动物园从日本和荷兰引进非洲企鹅,种群不断扩大,并成为国内种群发展的基础。但对其遗传多样性和结构了解很少,无法开展有效的遗传管理。本研究分析了上海动物园39只非洲企鹅的mtDNA D-loop区430 bp序列,并与已发表的日本种群的数据进行比较。结果表明,该片段存在15个变异位点,占分析位点的3.5%;共定义了10个单倍型,其遗传距离为0.002~0.019。日本种群包含A、B两个mtDNA D-loop单倍型世系,上海种群的10个单倍型均属于A世系,且与日本种群有5个共享单倍型,其遗传多样性水平略低于日本种群。上海种群可以进一步分为3个小的世系,但置信度偏低(54%~87%)。上述结果提示,上海种群相对于日本种群的A世系而言有较好涵盖度,但仍有必要进一步引进建群个体,尤其是含有B世系单倍型的个体。     

Functional porous carbons from waste cotton fabrics for dyeing wastewater purification

A new functional porous carbons (PC-WF) is prepared by activation-pyrolysis method use waste cotton fabrics (WF) as an abundant, cheap and available precursor for removal of Brilliant Crocein (BC-GR) and Cationic Red 2GL (CR-GL) from aqueous phase. The PC-WF was characterized by BET, FTIR, SEM, and XRD techniques, the surface area, total pore volume, average pore diameter was found as 1463.5 m² g^-1, 0.783 cm³ g^-1 and 2.14 nm, respectively. The influences on BC-GR and CR-GL adsorption of various experimental factors such as initial concentration and temperature were investigated. Adsorption kinetics was found to be best represented by the pseudo-second order model. The adsorption capacity was 319.8 mg g^-1 for BC-GR and 842.5 mg g^-1 for CR-GL at 30 °C, respectively. The results indicate that for waste cotton fabrics in particular, the practical application of this process to the production of porous carbon would be possible.     

安·兰德：客观主义还是存在主义——安·兰德与萨特哲学思想比较研究

同为20世纪著名的哲学家、小说家和公共知识分子，安·兰德与萨特的哲学思想之间存在不可忽略的可比性。如两者都强调个人意志、生命意志以及自由意志等。但是从本质上而言，兰德强调“客观”的客观主义哲学与萨特强调“主观”的存在主义哲学在具体哲学观念上有很大的分歧。具体表现为，在本体论与认识论上，前者强调存在的实体性，意识（理性）反映存在的被动性，后者强调存在的自在性和自为性，以及意识作为自为存在的主动性；前者强调自由的理性本质、绝对性以及目的性，后者强调自由的非本质性、处境以及非目的性；前者强调自我与他人的无冲突论、人只对自己负责，后者强调人总是处于与他人的关系中，人不光要为自己的选择负责，还要对他人的选择负责。     

添加复合酶对临武鸭瓜尔豆胚芽养分、氨基酸和能量利用率的影响

本试验旨在研究添加复合酶对临武鸭瓜尔豆胚芽养分、氨基酸和能量利用率的影响。试验选用24只体重2.0 kg左右的健康成年临武鸭公鸭,随机分为3组,每组8个重复,每个重复1只鸭。采用绝食强饲-全收粪法进行代谢试验。1、2组试验鸭每只强饲60 g/d饲粮,2组饲粮中添加250 mg/kg的复合酶,3组强饲60 g/d无氮饲粮。测定添加复合酶对临武鸭瓜尔豆胚芽中干物质(DM)、粗蛋白质(CP)、粗脂肪(EE)、粗纤维(CF)和17种氨基酸的表观利用率、真可利用率、表观代谢能(AME)和真代谢能(TME)。结果表明,临武鸭对瓜尔豆胚芽DM、CP、EE、CF和能量的真可利用率分别为67.07%、67.57%、65.52%、82.88%和77.39%,AME和TME分别为11.34和13.31 MJ/kg,17种氨基酸的真可利用率为67.72%~93.70%;添加复合酶使临武鸭的DM、CP、EE、CF和能量的真可利用率分别提高了5.23%、8.02%、5.80%、3.66%和3.31%(P0.05),AME和TME分别提高了3.97%和3.27%(P0.05),17种氨基酸的真可利用率提高了1.73%~11.62%,其中丝氨酸、甘氨酸、亮氨酸、酪氨酸和苯丙氨酸的真可利用率显著提高(P0.05)。由此可知,添加含有蛋白酶和非淀粉多糖酶的复合酶能够提高临武鸭对瓜尔豆胚芽中养分、氨基酸和能量的利用率。     

Effects of Lactic Acid Bacteria and Fructooligosaccharides on Growth Performance,Nutrient Digestibility and Serum Biochemical Indices of Arctic Foxes (Alopex lagopus) during Early Growth Period北大核心CSCD

This experiment was conducted to study the effects of dietary lactic acid bacteria (LAB) and fructooligosaccharides (FOS) on growth performance, nutrient digestibility and serum biochemical indices of Arctic foxes (Alopex lagopus) during early growth period. Sixty male post-litter Arctic foxes with the average body weight of (1.16±0.15) kg and at the age of (45±3) days were randomly assigned to 4 groups with 3 replicates per group and 5 foxes per replicate. The foxes were fed the following diets, respectively: basal diet (control group), basal diet+3×109 CFU / kg LAB (LAB group), basal diet+5 g / kg FOS (FOS group) and basal diet+3×109 CFU / kg LAB+5 g / kg FOS (LAB+FOS group). The experiment lasted for 30 days. The results showed as follows: 1) on the days 1 to 15, the diarrhea rate of foxes in the LAB group and LAB+FOS group was significantly lower than that in the control group and FOS group (P<0.05). On the days 16 to 30, the average daily gain of foxes in the LAB+FOS group was significantly higher than that in the control group and FOS group (P<0.05), but had no significant difference with LAB group (P>0.05); the diarrhea rate of foxes in the LAB+FOS group was significantly lower than that in the control group and FOS group (P<0.05), but had no significant difference with LAB group (P>0.05); compared with the FOS group, the feed to gain ratio of foxes in the LAB+FOS group was significantly decreased (P<0.05). 2) The dry matter digestibility of foxes in the LAB + FOS group was significantly higher than that in the control group and FOS group (P < 0.05), but had no significant difference with LAB group (P>0.05). There were no significant differences in nitrogen intake, fecal nitrogen, urine nitrogen, nitrogen deposition, net protein utilization and protein biological value among all groups (P>0.05). 3) Serum total protein (TP) content of foxes in the LAB+FOS group was significantly higher than that in the FOS group (P<0.05), but had no significant difference with control group and LAB group (P>0.05). Serum albumin (ALB) content of foxes in the LAB group was significantly higher than that in the control group and FOS group (P<0.05), but had no significant difference with LAB+ FOS group (P>0.05). Serum urea nitrogen (UN) content of foxes in the LAB+FOS group was significantly decreased compared with the control group (P < 0. 05). In conclusion, the combined supplementation of 3 × 109 CFU / kg LAB and 5 g / kg FOS in the diet is beneficial to reduce diarrhea rate, improve dry matter digestibility, improve body immune level, and promote the growth of Arctic foxes during early growth period. © 2023 Chinese Journal of Urology. All rights reserved.     

简述湿地公园总体布局及其保护对策

从3个方面分别介绍了吉林扶余大金碑湿地公园的概况、总体规划布局及保护利用对策。     

面向猕猴桃产业链的联盟链隐私交易方案

针对猕猴桃产业联盟链交易中金额与身份的双重隐私保护问题，提出一种基于⁺HomElG零知识证明(⁺HomElG zero knowledge proof,⁺HomElG-ZKProof)和SM2的猕猴桃产业联盟链隐私交易方案。首先，转账方利用⁺HomElG加密交易金额后将其发送给接收方，接收方基于SM2签名确认交易后发送给转账方；其次，转账方基于⁺HomElG-ZKProof对交易金额相关密文生成零知识证明证据，基于SM2可链接环签名对交易金额相关密文和交易双方身份分别生成环签名，与接收方SM2签名一起经系统层Raft共识打包上链；然后，由监管节点验证SM2签名、两次环签名及链接性后确认交易双方身份，用户节点间在应用层使用PBFT共识验证交易金额相关密文、环签名及交易金额相关零知识证明证据后确认交易的有效性；最后，由监管节点将有效交易区块编号经系统层Raft共识上链并更新账户余额。分析表明，该文方案具有抗篡改攻击、抗公钥替换攻击、抗假冒攻击以及匿名性，安全性较高；测试结果表明，该...     

Evolution Analysis About Soybean MIR166 Family

MicroRNA(miRNA) is a class of important regulating non-coding small molecular RNA. The gma-MIR166 gene family consists of 21 members and their expression patterns diversify widely. It is important to analyze the evolution of gma-MIR166 gene family in order to understand the evolutionary mechanisms of miRNAs in soybean. In this study, we implemented soybean wide genome block analysis, the molecular phylogeny of gma-MIR166 and block analysis of gma-MIR166 family. The results showed that both chromosome big segmental duplications and tandem duplications were main reasons contributed to the expanding of gmaMIR166 gene family. These findings suggested that gma-MIR166 gene family might originate from one or two ancient miRNA genes. The results of research provided a support for evolutionary study of miRNAs in soybean and related species in Fabaceae.     

油用亚麻可溶性糖、脂肪含量与硬脂酰-酰基载体蛋白脱氢酶基因表达相关性分析

为研究油用亚麻叶片、果球4个发育阶段硬脂酰-酰基载体蛋白脱氢酶基因(sad)表达水平与可溶性糖含量、脂肪含量之间的关系,以3个已知亚麻酸含量相对不同的油用亚麻品种为试验对象,应用q RTPCR技术对不同发育时期组织中sad基因的相对表达量与可溶性糖含量以及脂肪含量之间的关系进行分析。结果表明,在油用亚麻叶片和果球的不同发育阶段sad基因的表达模式符合正态分布,在品种和时期之间表达量差异明显。可溶性糖的含量在果球和叶片中差异明显,相关性分析结果显示,在sad基因表达量增加时,可溶性糖含量相对减少;脂肪含量与sad基因的表达量呈极显著正相关。油用亚麻中sad基因表达直接影响油用亚麻可溶性糖和脂肪含量,进而影响亚麻油的品质。