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枯草芽胞杆菌和三肽囊素对肉鸡生长性能、血液生化和抗氧化指标的影响 被引量:6
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作者 易丹 沈雪娇 +3 位作者 曾东 倪学勤 卞正容 雷明霞 《华中农业大学学报》 CAS CSCD 北大核心 2014年第2期78-82,共5页
选取144只1日龄科宝-500肉鸡,随机分为4组,每组3个重复,每个重复12只。对照组(Ⅰ)和三肽囊素组(Ⅱ)饲喂基础饲料,枯草芽胞杆菌组(Ⅲ)和枯草芽胞杆菌加三肽囊素复合组(Ⅳ)在基础饲料中添加枯草芽胞杆菌1.0×106cfu/g,Ⅱ、Ⅳ组在4日龄... 选取144只1日龄科宝-500肉鸡,随机分为4组,每组3个重复,每个重复12只。对照组(Ⅰ)和三肽囊素组(Ⅱ)饲喂基础饲料,枯草芽胞杆菌组(Ⅲ)和枯草芽胞杆菌加三肽囊素复合组(Ⅳ)在基础饲料中添加枯草芽胞杆菌1.0×106cfu/g,Ⅱ、Ⅳ组在4日龄和7日龄注射0.01 mg/kg的三肽囊素,试验期为42 d,探讨枯草芽胞杆菌与三肽囊素对肉鸡生长性能、血液生化和抗氧化指标的影响。结果表明:与对照组相比,Ⅱ、Ⅲ和Ⅳ组试验前期和全期日增质量显著提高(P<0.05),Ⅳ组料重比最低,较对照组降低4.37%(P>0.05);21日龄时,Ⅲ、Ⅳ组血清总蛋白含量分别比对照组提高19.60%、27.68%(P<0.05),白蛋白含量分别比对照组提高16.72%、18.03%(P<0.05);21日龄的Ⅲ组和42日龄的Ⅳ组的CAT、GSH-Px酶活力显著高于对照组(P<0.05),42日龄时试验组血清MDA显著低于对照组。由此可见,添加枯草芽胞杆菌及其与三肽囊素联合应用能改善肉鸡生长性能,提高血清总蛋白和白蛋白含量,增加CAT和GSH-Px的酶活力。 展开更多
关键词 枯草芽胞杆菌 三肽囊素 生长 陆能 血液生化指标 抗氧化指标 肉鸡
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闽台地球动力学及其能态结构研究 被引量:2
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作者 王洪涛 陈箴 《福建地震》 2005年第1期15-26,29,共13页
台湾地处中国大陆东南边缘是菲律宾海板块凸向亚欧大陆俯冲-碰撞异常岛弧带。福建位于台湾岛弧西侧活动地块。闽台独特的构造格架、地球动力学状态和构造应力场与地震活动之间的内在关联性,使之成为研究海陆板块俯冲-碰撞效应及其对板... 台湾地处中国大陆东南边缘是菲律宾海板块凸向亚欧大陆俯冲-碰撞异常岛弧带。福建位于台湾岛弧西侧活动地块。闽台独特的构造格架、地球动力学状态和构造应力场与地震活动之间的内在关联性,使之成为研究海陆板块俯冲-碰撞效应及其对板内地震活动影响天然地区。本文主要依据近30多年以来对福建地块的地震地质背景、地壳变形观测、构造应力场、地震活动性以及地壳-上地幔结构探测、地热场等资料,结合台湾学者详细对台湾岛弧地球动力学与强震构造等研究成果,探索海陆板块俯冲-碰撞地球动力学特征及其对板内活动地块影响,进而揭示板间-板缘-板内强震活动关联性和动力学性状的异同性。试图为本区强震预测和防震减灾对策提供新思路。 展开更多
关键词 活动构造格架 地壳变形与应力轨迹 强震动力学特征 陆能态结构
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外保温材料防火性能在防火应用技术上的改进措施
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作者 詹霭峰 《科技与企业》 2013年第2期300-300,302,共2页
我国现在处于建设的高速发展时期,建筑物外保温隔热性能的改善会对建筑使用和运行中的节能减排起到巨大作用,文中主要对有机外墙外保温材料模塑聚苯板(EPS)和聚氨酯泡沫板在不同薄抹灰厚度的情况下进行试验,研究防火性能及技术改进措施... 我国现在处于建设的高速发展时期,建筑物外保温隔热性能的改善会对建筑使用和运行中的节能减排起到巨大作用,文中主要对有机外墙外保温材料模塑聚苯板(EPS)和聚氨酯泡沫板在不同薄抹灰厚度的情况下进行试验,研究防火性能及技术改进措施的探讨。 展开更多
关键词 建筑外保温 保温材料 防足陆能
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Observed near-inertial waves in the wake of Typhoon Hagupit in the northern South China Sea 被引量:3
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作者 杨兵 侯一筠 胡珀 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2015年第5期1265-1278,共14页
Energetic near-inertial internal waves (NlWs) were observed on the continental slope of the northern South China Sea in September 2008. Characteristics of the observed near-inertial waves were examined based on curr... Energetic near-inertial internal waves (NlWs) were observed on the continental slope of the northern South China Sea in September 2008. Characteristics of the observed near-inertial waves were examined based on current data recorded by a moored acoustic Doppler current profiler. Results of a simple slab model indicated that the NIWs were generated by the surface winds of Typhoon Hagupit. Following Hagupit's passage, the wave field was dominated by baroclinic NIWs. The near-inertial currents were surface-intensified with a maximum of 0.52 m/s but still reached 0.1 m/s at the depth of 210 m. Moreover, the near-inertial currents were clockwise-polarized and slightly elliptical. A depth-leading phase of the near- inertial currents was evident, which indicated downward energy propagation. However, the rotary vertical wavenumber spectra suggested that upward energy propagation also existed, which was consistent previous theoretical study. The frequency of the NIWs, modified by the positive background vorticity, was 0.714 2 cycles per day, which was 0.02f0 higher than the local inertial frequency (f0). The near-inertial kinetic energy evolved exponentially and had an e-folding timescale of about 3 days. The vertical phase and group velocity were estimated to be 10 and 2.1 m/h, respectively, corresponding to a vertical wavelength of 340 m. The NlWs were dominated by the second mode with a variance contribution of 〉50%, followed by the third mode, while the first mode was insignificant. 展开更多
关键词 near-inertial internal waves South China Sea Typhoon Hagupit
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A Cross-Cultural Study on the Reciprocal Relationships Between Individual Values and Communicative Competence
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作者 ZHOU Gang 《Sino-US English Teaching》 2013年第6期424-438,共15页
This research compares a sample of the mainland Chinese university students (N = 325) and a sample of the British university students (N = 51) from a cross-cultural perspective by examining the relationships betwe... This research compares a sample of the mainland Chinese university students (N = 325) and a sample of the British university students (N = 51) from a cross-cultural perspective by examining the relationships between individual values and communicative competence. Specifically, it aims to gain an insight into cultural impact both on the Chinese university students' self-perceptions of communication competence in the Chinese cultural context and on the British university students' self-perceptions of communication competence in a Western cultural context. The findings suggest that the mainland Chinese university students' interdependent/independent self-construals best predict their self-perceptions of communication competence. Results indicate that both Western and Chinese social values influence the two samples' interdependent and independent self-construals, and the two samples' self-perceptions of communication competence and interdependent self-construals differ significantly 展开更多
关键词 CROSS-CULTURAL cultural variability communication competence
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Comparative Analysis of Energy Efficiency in Wheat Production in Different Climate Conditions of Europe
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作者 Janusz Gotaszewski Marcel van der Voort +3 位作者 Andreas Meyer-Aurich Fatima Baptista Athanasios Balafoutis Hannu Juhani Mikkola 《Journal of Agricultural Science and Technology(B)》 2014年第8期632-640,共9页
This paper presents results concerning energy efficiency of wheat production considered in the context of specific energy input variation in different climatic conditions of Europe as well as case studies on implement... This paper presents results concerning energy efficiency of wheat production considered in the context of specific energy input variation in different climatic conditions of Europe as well as case studies on implementation of selected energy saving measures in practice. The source data collected from the six european union (EU) countries represent five agricultural regions of continental Europe and three climates: continental, temperate and Mediterranean. The life cycle assessment (LCA) methodology was applied to analyze the data excluding of pre-farm gate activities. The total primary energy consumption was decomposed into main energy input streams and it was regressed to yield. In order to compare energy efficiency of wheat production across the geographical areas, the data envelopment analysis (DEA) was applied. It was shown that the highest wheat yield (6.7 t/ha to 8.7 t/ha) at the lowest specific energy input (2.08 GJ/t to 2.56 G J/t) is unique for temperate climate conditions. The yield in continental and Mediterranean climatic conditions is on average lower by 1.3 t/ha and 2.7 t/ha and energy efficiency lower by 14% and 38%, respectively. The case studies have shown that the energy saving activities in wheat production may be universal for the climatic zones or specific for a given geographical location. It was stated that trade-offs between energy, economic, and environmental effects, which are associated with implementation of a given energy saving measure or a set of measures to a great extent depend on the current energy efficiency status of the farm and opportunity for investment, which varies substantially across Europe. 展开更多
关键词 WHEAT energy efficiency trade-off analysis
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微生态制剂、多酚和酵母硒对仔猪生产性能和肠道菌群的影响 被引量:5
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作者 范彧 解林奇 +4 位作者 郝薇 白秀梅 闫雪 王安如 霍刚 《饲料与畜牧(新饲料)》 2017年第8期27-32,共6页
试验旨在研究微生态制剂、植物提取物多酚和酵母硒对仔猪生产性能和肠道菌群多样性的影响。试验选用270头21日龄健康断奶仔猪,随机分为5组:在玉米-豆粕型基础日粮中分别添加50g/t乳球菌微生态制剂、250g/t乳酸菌复合微生态制剂、334g/t... 试验旨在研究微生态制剂、植物提取物多酚和酵母硒对仔猪生产性能和肠道菌群多样性的影响。试验选用270头21日龄健康断奶仔猪,随机分为5组:在玉米-豆粕型基础日粮中分别添加50g/t乳球菌微生态制剂、250g/t乳酸菌复合微生态制剂、334g/t多酚复合添加剂和150g/t酵母硒;正对照组饲喂基础日粮+抗生素,试验期138d。试验结果表明,与正对照抗生素组相比,各处理组的生产性能无显著差异,从数值上看,乳球菌组和乳酸菌组的料重比均低于正对照组。试验第1d,乳酸菌组粪便中卷曲乳酸杆菌、解纤维梭菌和瘤胃球菌增多,乳球菌组柔嫩梭菌增多,多酚组和酵母硒组Papillibacter cinnamivorans增多。由此可见,以上几种添加剂对仔猪和生长育肥猪的生长性能均有改善作用,且对仔猪肠道内微生物菌群有一定影响。 展开更多
关键词 微生态制剂 多酚 酵母硒 生产陆能 肠道微生物
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Soil pH impact on microbial tetraether lipids and terrestrial input index (BIT) in China 被引量:19
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作者 YANG Huan DING WeiHua +4 位作者 WANG JinXiang JIN ChengSheng HE GangQiang QIN YangMin XIE ShuCheng 《Science China Earth Sciences》 SCIE EI CAS 2012年第2期236-245,共10页
The distributions of microbial tetraether lipids i.e. glycerol dialkyl glycerol tetraethers (GDGTs) were investigated in a variety of Chinese soils featured by a wide range of pH values in different climate zones. The... The distributions of microbial tetraether lipids i.e. glycerol dialkyl glycerol tetraethers (GDGTs) were investigated in a variety of Chinese soils featured by a wide range of pH values in different climate zones. The bacterial branched GDGTs and archaeal isoprenoid GDGTs were found to be widely distributed in Chinese soils and their relative abundance was controlled primarily by soil pH. The bacterial bGDGTs usually dominate over archaeal iGDGTs in abundance when the soil pH is below 8.0. However archaeal iGDGTs become dominant and the abundance of halophilic archaea characterized by GDGT V without cyclopentyl ring increases dramatically in the alkaline soil with pH greater than 8.0. The relative abundance of archaeal iGDGTs to bacterial bGDGTs was defined here as RAI index. The RAI index decreases with elevated soil pH and a linear correlation is found between them indicating that the relative abundance of archaeal iGDGTs to bacterial bGDGTs increases with increased pH. The RAI index thus could be a novel proxy of the pH values of paleosol. The terrestrial input index BIT (Branched and Isoprenoid Tetraethers Index) decreases with increased soil pH suggesting that soil pH should be taken into consideration when the terrestrial contribution to marine sediments is estimated by BIT index. Moreover the TEX86 index cannot be used to reconstruct sea surface temperature in the sediments featured by a large terrestrial input. 展开更多
关键词 GDGTs ARCHAEA BIT index soil pH
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Preface 被引量:2
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作者 DAI YiTang XU Kun +3 位作者 XIE XiaoJun YAN Li WANG RuiXin LIN JinTong 《Science China Chemistry》 SCIE EI CAS 2013年第11期1493-1494,共2页
Owing to the fast economic growing and the concern over greenhouse gases and air pollution, the development of nuclear energy is one important option to meet the expanded energy consumption in our future. To achieve t... Owing to the fast economic growing and the concern over greenhouse gases and air pollution, the development of nuclear energy is one important option to meet the expanded energy consumption in our future. To achieve that goal, continuing and reliable supplies of uranium are critical to future nuclear power projects. As is well known, global terrestrial reserves of uranium are limited and the deposits in China are relatively small. 展开更多
关键词 FE3O4 FE2O3 Ag/Fe3O4 Ag/Fe2O3 ELECTROCATALYSIS
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Eco-environmental Impact of Bioenergy Production 被引量:2
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作者 John W.Bickham Mark A.Thomas 《Journal of Resources and Ecology》 CSCD 2010年第2期110-116,共7页
生物质能源生产是能源发展领域的重大挑战,在解决新的替代能源中扮演着重要角色。本文着重论述了美国生物能源生产的生态环境问题。从经济、环境和战略方面考虑,生物能源有望提高国家安全,因而受政策驱动的美国生物能源生产技术备受注... 生物质能源生产是能源发展领域的重大挑战,在解决新的替代能源中扮演着重要角色。本文着重论述了美国生物能源生产的生态环境问题。从经济、环境和战略方面考虑,生物能源有望提高国家安全,因而受政策驱动的美国生物能源生产技术备受注目。尽管生物能源具有诸多潜在效益,但是在北美,生物原料供应、高强度经营的土地上农药使用及其对陆地野生动物的潜在影响等令人担忧,我们分析了其中的原因。通常认为,未来生物能源的环境、经济效应是正面的;然而,谨慎地审视和发展生物能源经济以保护生态系统的可持续性显得至关重要。 展开更多
关键词 BIODIVERSITY biofuels WILDLIFE terrestrial habitats CONSERVATION agricultural ecosystems
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Development of medical treatment for eye injuries in the mainland of China over the past decade 被引量:5
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作者 Chang-GuanWang Zhi-Zhong Ma 《Chinese Journal of Traumatology》 CAS CSCD 2016年第6期311-316,共6页
In the article, the development of medical treatment for eye injuries in the mainland of China was reviewed. According to the data provided in Eye Injury Vitrectomy Study (EIVS), 27% of 72 eyes with no light percept... In the article, the development of medical treatment for eye injuries in the mainland of China was reviewed. According to the data provided in Eye Injury Vitrectomy Study (EIVS), 27% of 72 eyes with no light perception (NLP) gained recovery in term of antomy and visual function. Vitrectomy initiated at more than 4 weeks after open eye injury is an independent risk factor for developing PVR. Prognosis of anatomy and visual function of the injured eye with PVR is markedly worse than that without PVR. Serious injuries of ciliary body, choroid and retina are three key parts of the eye with NLP. The concept that the treatment of the eye injury gradually focus on the whole globe is embodied. The data from 13575 in patients with traumatic eyes in 14 hospitals revealed that the rate of immediate enucleation was remarkable reduced with comparison of 20 years ago. 展开更多
关键词 Eye injuryTraumatic proliferative vitreo-retinopathyNo light perceptionHospital-bassed dataEnucleationEndophthalmitis
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Carbon carry capacity and carbon sequestration potential in China based on an integrated analysis of mature forest biomass 被引量:16
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作者 LIU Ying Chun YU Gui Rui +2 位作者 WANG Qiu Feng ZHANG Yang Jian XU Ze Hong 《Science China(Life Sciences)》 SCIE CAS 2014年第12期1218-1229,共12页
Forests play an important role in acting as a carbon sink of terrestrial ecosystem.Although global forests have huge carbon carrying capacity(CCC)and carbon sequestration potential(CSP),there were few quantification r... Forests play an important role in acting as a carbon sink of terrestrial ecosystem.Although global forests have huge carbon carrying capacity(CCC)and carbon sequestration potential(CSP),there were few quantification reports on Chinese forests.We collected and compiled a forest biomass dataset of China,a total of 5841 sites,based on forest inventory and literature search results.From the dataset we extracted 338 sites with forests aged over 80 years,a threshold for defining mature forest,to establish the mature forest biomass dataset.After analyzing the spatial pattern of the carbon density of Chinese mature forests and its controlling factors,we used carbon density of mature forests as the reference level,and conservatively estimated the CCC of the forests in China by interpolation methods of Regression Kriging,Inverse Distance Weighted and Partial Thin Plate Smoothing Spline.Combining with the sixth National Forest Resources Inventory,we also estimated the forest CSP.The results revealed positive relationships between carbon density of mature forests and temperature,precipitation and stand age,and the horizontal and elevational patterns of carbon density of mature forests can be well predicted by temperature and precipitation.The total CCC and CSP of the existing forests are 19.87 and 13.86 Pg C,respectively.Subtropical forests would have more CCC and CSP than other biomes.Consequently,relying on forests to uptake carbon by decreasing disturbance on forests would be an alternative approach for mitigating greenhouse gas concentration effects besides afforestation and reforestation. 展开更多
关键词 carbon carrying capacity carbon sequestration potential China CLIMATE mature forest PATTERN reference level stand age
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