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Structural Style and Hydrocarbon Prospectivity of the Growth Faults Related Structures in the Bengal Basin
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作者 Md. Fazle Rabbi Joy Md. Mostafizur Rahman +2 位作者 S. M. Mainul Kabir Tamanna Binte Arfan Farhad Hsossain 《Journal of Geoscience and Environment Protection》 2024年第8期197-218,共22页
The structural and tectonic evolution of the Bengal Basin is characterized by a complex interplay of factors, including sedimentation, the rise of the Himalayan Mountains, and the movements of Jurassic syn-rift faults... The structural and tectonic evolution of the Bengal Basin is characterized by a complex interplay of factors, including sedimentation, the rise of the Himalayan Mountains, and the movements of Jurassic syn-rift faults. This study aims to comprehend the progression of growth faults inside the basin by examining fault geometry, basin development, and structural relief patterns. We used high-quality 2D seismic lines from the PK-MY-8403, classical seismic interpretation techniques and modeling were carried out to reveal the plate tectonic conditions, stratigraphy, and sedimentation history of the basin. The break-up unconformity, Paleocene and Eocene submerged conditions, and crucial geological formations including the Sylhet Limestone, Barail Group, and Surma Group were among the notable features recognized in seismic section. With an emphasis on growth strata and pre-growth strata, significant variations in layer thickness and relief were remarked in different stratigraphic levels. Basin development events like the evolution of the Miocene remnant ocean basin, sedimentation in Oligocene, Eocene Himalayan collision, and the Pliocene reverse fault development are analyzed. In the early the Pliocene compressional forces outpaced sedimentation rates and syn-depositional normal faults of Oligocene time began to move in opposite direction. Syn-depositional growth faults may have formed in the Bengal Basin as a result of this reversal. This research provides a detailed comprehensive knowledge of growth fault development in the Bengal Basin following the seismic interpretation, modelling, and thickness/relief analysis. The outcomes point to a substantial hydrocarbon potential, especially in regions like the Eocene Hinge Zone, where the prospectivity of the area is enhanced by carbonate reefs and Jalangi shale. However, the existence of petroleum four-way closure in the investigated region requires further investigation. 展开更多
关键词 Plate Tectonic Subsidence History Structural Relief Syn-depositional Model growth Fault Petroleum System
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GROWTH MECHANISM OF TiC WHISKERS PREMRED BY A MODIFIED CHEMICAL VAPOR DEPOSITION METHOD 被引量:7
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作者 J.S. Pan and Y. W. Yuan (Department of Materials Science and Engineering, Tsinghua Universityt Beijing 100084, China)(Department of Materials Science and Engineering, Tsinghua Universityt Beijing 100084, China) 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1999年第3期278-282,共5页
High quality TiC whiskers have been prepared by a modified chemical vapor deposition (CVD) method using TiCl4 and CH4 as reactant gases and Ni as substrate. The deposition temperature and gas flow mies have ampreciabl... High quality TiC whiskers have been prepared by a modified chemical vapor deposition (CVD) method using TiCl4 and CH4 as reactant gases and Ni as substrate. The deposition temperature and gas flow mies have ampreciable effect on the whisker growth.The whisker orientations and morphology are determined by X-my diffraction (XRD),scanning electron micmpmph (SEM) and transmission electron microgmph (TEM).In addition to the spherical tips, spiral growth microsteps and obvious terraces are observed at the tips and side faces of whiskers in the present eoperiment. The whiskers grow mostly along (100) direction. The whisker growth mechanism is discussed in detail. 展开更多
关键词 TIC WHISKER chemical vapor deposition (CVD) growth mechanism
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Effects of submicron diamonds on the growth of copper in Cu-diamond co-deposition 被引量:2
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作者 You-yang Wei Wei-ping Li +2 位作者 Hui-cong Liu Yong-zheng Liu Li-qun Zhu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2012年第1期72-76,共5页
Submicron diamonds were co-deposited on aluminum substrates with copper from the acid copper sulfate electrolyte by electro- lyte-suspension co-deposition. After submicron diamonds were added to the electrolyte, the s... Submicron diamonds were co-deposited on aluminum substrates with copper from the acid copper sulfate electrolyte by electro- lyte-suspension co-deposition. After submicron diamonds were added to the electrolyte, the shape of copper grains transformed from oval or round to polyhedron, the growth mode of copper grains transformed from columnar growth to gradual change in size, and the preferred ori- entation of copper grains transformed from (220) to (200). Analyzing the variation of cathodic overpotential, it was found that the cathodic overpotential tended to remain tmchanged when copper plane (220) grew in the process of electrodepositing pure copper, while it tended to decrease with time when copper plane (200) grew in the process of co-deposition. It was inferred that copper plane (200) was propitious to the deposition of submicron diamonds. 展开更多
关键词 composite coatings COPPER DIAMOND CO-depositION gradient materials grain growth
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A MODELING STUDY OF PARAMETERIZATION SCHEMES FOR DEPOSITIONAL GROWTH OF ICE CRYSTAL:FOUR RAINFALL CASES OVER TROPICS AND MIDLATITUDES
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作者 XIN Jin LI Xiao-fan 《Journal of Tropical Meteorology》 SCIE 2017年第3期259-268,共10页
Depositional growth of ice crystal is one of the major processes for development of precipitation systems and can be represented by depositional growth of cloud ice from cloud water(P_(IDW)) and depositional growth of... Depositional growth of ice crystal is one of the major processes for development of precipitation systems and can be represented by depositional growth of cloud ice from cloud water(P_(IDW)) and depositional growth of snow from cloud ice(P_(SFI)) in cloud-resolving model. Four parameterization schemes are analyzed in the cloud-resolving model simulations of four rainfall cases over the tropics and midlatitudes. The comparison of time and model domain mean data shows that Shen's scheme produces the closest rainfall simulation to the observation. Compared to Zeng's scheme,Shen's scheme improves the mean rain-rate simulation significantly through the dramatic decrease in depositional growth of cloud ice from cloud water. Compared to other schemes, Shen's scheme produces the better rainfall simulation via the reduction in the mean rain rate associated with the enhanced gain of cloud water and ice. 展开更多
关键词 depositional growth of ice crystal rainfall simulation rain rate cloud-resolving-model simulation
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Growth and characterization of AlN epilayers using pulsed metal organic chemical vapor deposition
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作者 吉泽生 汪连山 +5 位作者 赵桂娟 孟钰淋 李方政 李辉杰 杨少延 王占国 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第7期420-425,共6页
We report the growth of Al N epilayers on c-plane sapphire substrates by pulsed metal organic chemical vapor deposition(MOCVD). The sources of trimethylaluminium(TMAl) and ammonia were pulse introduced into the re... We report the growth of Al N epilayers on c-plane sapphire substrates by pulsed metal organic chemical vapor deposition(MOCVD). The sources of trimethylaluminium(TMAl) and ammonia were pulse introduced into the reactor to avoid the occurrence of the parasitic reaction. Through adjusting the duty cycle ratio of TMAl to ammonia from 0.8 to 3.0, the growth rate of Al N epilayers could be controlled in the range of 0.24 m/h to 0.93 m/h. The high-resolution x-ray diffraction(HRXRD) measurement showed that the full width at half maximum(FWHM) of the(0002) and(10-12) reflections for a sample would be 194 arcsec and 421 arcsec, respectively. The step-flow growth mode was observed in the sample with the atomic level flat surface steps, in which a root-mean-square(RMS) roughness was lower to 0.2 nm as tested by atomic force microscope(AFM). The growth process of Al N epilayers was discussed in terms of crystalline quality, surface morphology,and residual stress. 展开更多
关键词 pulsed metal organic chemical vapor deposition growth mode MORPHOLOGY crystalline quality
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The Effect of Pressure on the Dissociation of H_2/CH_4Gas Mixture during Diamond Films Growth via Chemical Vapor Deposition 被引量:1
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作者 赵庆勋 辛红丽 +2 位作者 韩佳宁 文钦若 杨景发 《Plasma Science and Technology》 SCIE EI CAS CSCD 2002年第1期1113-1118,共6页
Monte Carlo simulations are adopted to study the electron motion in the mixture of H2 and CH4 during diamond synthesis via Glow Plasma-assisted Chemical Vapor Deposition (GPCVD). The non-uniform electric field is used... Monte Carlo simulations are adopted to study the electron motion in the mixture of H2 and CH4 during diamond synthesis via Glow Plasma-assisted Chemical Vapor Deposition (GPCVD). The non-uniform electric field is used and the avalanche of electrons is taken into account in this simulation. The average energy distribution of electrons and the space distribution of effective species such as CH3, CH+3, CH+ and H at various gas pressures are given in this paper, and optimum experimental conditions are inferred from these results. 展开更多
关键词 The Effect of Pressure on the Dissociation of H2/CH4Gas Mixture during Diamond Films growth via Chemical Vapor deposition CH
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Effect of Deposition Time on Microstructures and Growth Behavior of ZrC Coatings Prepared by Low Pressure Chemical Vapor Deposition with the Br2-Zr-C3H6-H2-Ar System
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作者 马新 LI Yong +4 位作者 MEI Min 胡海峰 HE Xinbo QU Xuanhui CHEN Si'an 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第2期284-288,共5页
ZrC coatings were deposited on graphite substrates by low pressure chemical vapor deposition(LPCVD) with the Br2-Zr-C3H6-H2-Ar system. The effects of deposition time on the microstructures and growth behavior of ZrC... ZrC coatings were deposited on graphite substrates by low pressure chemical vapor deposition(LPCVD) with the Br2-Zr-C3H6-H2-Ar system. The effects of deposition time on the microstructures and growth behavior of ZrC coatings were investigated. ZrC coating grew in an island-layer mode. The formation of coating was dominated by the nucleation of ZrC in the initial 20 minutes, and the rapid nucleation generated a fine-grained structure of ZrC coating. When the deposition time was over 30 min, the growth of coating was dominated by that of crystals, giving a column-arranged structure. Energy dispersive X-ray spectroscopy showed that the molar ratio of carbon to zirconium was near 1:1 in ZrC coating, and X-ray photoelectron spectroscopy showed that ZrC was the main phase in coatings, accompanied by about 2.5mol% ZrO2 minor phase. 展开更多
关键词 ZrC ultra-high temperature ceramic microstructures growth behaviors chemical vapor deposition
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Selective Area Growth and Characterization of GaN Nanorods Fabricated by Adjusting the Hydrogen Flow Rate and Growth Temperature with Metal Organic Chemical Vapor Deposition 被引量:1
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作者 任鹏 韩刚 +6 位作者 付丙磊 薛斌 张宁 刘喆 赵丽霞 王军喜 李晋闽 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第6期145-149,共5页
CaN nanorods are successfully fabricated by adjusting the flow rate ratio of hydrogen (H2)/nitrogen (N2) and growth temperature of the selective area growth (SAG) method with metal organic chemical vapor deposit... CaN nanorods are successfully fabricated by adjusting the flow rate ratio of hydrogen (H2)/nitrogen (N2) and growth temperature of the selective area growth (SAG) method with metal organic chemical vapor deposition (MOCVD). The SAG template is obtained by nanospherical-lens photolithography. It is found that increasing the flow rate of 1-12 will change the CaN crystal shape from pyramid to vertical rod, while increasing the growth temperature will reduce the diameters of GaN rods to nanometer scale. Finally the CaN nanorods with smooth lateral surface and relatively good quality are obtained under the condition that the H2:N2 ratio is 1:1 and the growth temperature is 1030℃. The good crystal quality and orientation of GaN nanorods are confirmed by high resolution transmission electron microscopy. The cathodoluminescence spectrum suggests that the crystal and optical quality is also improved with increasing the temperature. 展开更多
关键词 of or IS as RATE GAN Selective Area growth and Characterization of GaN Nanorods Fabricated by Adjusting the Hydrogen Flow Rate and growth Temperature with Metal Organic Chemical Vapor deposition by with
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Poisoning of MoO_3 Precursor on Monolayer MoS_2 Nanosheets Growth by Tellurium-Assisted Chemical Vapor Deposition
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作者 王志刚 庞斐 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第8期137-140,共4页
We obtain molybdenum disulfide (MoS2) nanosheets (NSs) with edge sizes of 18μm by direct sulfuration of MoO3 powder spread on the SiO2/Si substrates. However, the undesirable MoO3 nanoparticles (NPs) left on th... We obtain molybdenum disulfide (MoS2) nanosheets (NSs) with edge sizes of 18μm by direct sulfuration of MoO3 powder spread on the SiO2/Si substrates. However, the undesirable MoO3 nanoparticles (NPs) left on the surface of MoS22 NSs poison the MoO3 precursor. Introducing Te vapors to react with MoS2 to form low melting point intermediate MoSxTe2-x, the evaporations of MoO3 precursor recover and MoO3 NPs disappear. Thus Te vapor is effective to suppress poisoning of the MoO3 precursor. Selecting the appropriate amount of Te vapor, we fabricate monolayer MoS22 NSs up to 70μm in edge length. This finding can be significant to understand the role of Te in the Te-assisted chemical vapor deposition growth process of layered chalcogenide materials. 展开更多
关键词 NS NP Te Poisoning of MoO3 Precursor on Monolayer MoS2 Nanosheets growth by Tellurium-Assisted Chemical Vapor deposition
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Growth Pattern and Its Indication of Spheroidal Nano-Micro Crystal Aggregates of Pyrite in the Baiyunpu Pb-Zn Polymetallic Deposit, Central Hunan 被引量:2
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作者 GAO Shang HUANG Fei +6 位作者 GU Xiangping LI Xiangyou MENG Lin LIU Rui SUN Li GAO Wenyuan YU Huantao 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2014年第6期1770-1783,共14页
The Baiyunpu deposit lies in the southwest plunging Dachengshan anticline in central Hunan, which is a large Pb-Zn polymetallic deposit. The orebodies were surrounded by the Qiziqiao Formation limestone in the Middle ... The Baiyunpu deposit lies in the southwest plunging Dachengshan anticline in central Hunan, which is a large Pb-Zn polymetallic deposit. The orebodies were surrounded by the Qiziqiao Formation limestone in the Middle Devonian, and its geological occurrence is consistent with the wall rocks. A large number of spheroidal pyrite aggregates are found unevenly distributed in the ores. The spheroidal aggregates are made up of kernels and concentric rings. The kernels are composed of approximately epigranular pyrite nanocrystals, while the rings are composed of accumulated pyrite microcrystals growing along the radial direction. The spheroidal pyrite aggregate and its outer zones can be divided into five areas(A–E). The results of electron probe micro analysis(EPMA) show that from the zone A1 to B, Co/Ni 〈1, the sum of Co and Ni is 0.08%–0.26%, S/Fe increases from 2.06 to 2.15. While from the zone C to E, Ni cannot be detected and S/Fe decreases from 2.22 to 2.08. Powder X-ray diffraction(XRD) analysis in the micro zone shows obvious crystalline characteristics in the aggregates. Moving from the inside outwards, the maximum diffraction peak intensity of the(111) and(220) crystal planes of pyrite increases, and the crystallinity improves. The degree of change in the(111) plane is the most prominent. Considering the theory of crystal growth along with the geologic features of the depositional environment where the spheroidal pyrite aggregates developed, we confirm that the spheroidal aggregates are the result of nano-micro crystalline gathering and growth occurring by the following sequence of processes:nano-crystalline nucleation and growth, gathering into a ball, oriented growth of microcrystals, continuous accumulation, and adjustment of grain boundaries. The formation of the spheroidal pyrite aggregates in the late Qiziqiao Formation of the Middle Devonian occurred in a neutral to weak alkaline and reductive sedimentary environment in the normal oxygen-rich shallowwater carbonate platform edge. The variations in the S/Fe ratio and crystallisation characteristics indicate that during pyrite crystal growth, the sulphur fugacity was high locally and rose constantly, the degree of supersaturation decreased locally and the growth environment was stable relatively. 展开更多
关键词 Baiyunpu Pb-Zn polymetallic deposit PYRITE nano-micro crystal spheroidal aggregates growth pattern indication significance
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能谱CT联合VEGF预测120例肝癌TACE术后碘油沉积
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作者 张永强 李展展 +7 位作者 段静 王常富 赵杰 阮成伟 杨爱玲 梁琰 王昀璐 段国斌 《安徽医药》 CAS 2024年第4期714-718,共5页
目的探究能谱CT定量分析联合血清血管内皮生长因子(VEGF)水平检测在肝癌经导管肝动脉化疗栓塞术(TACE)后碘油沉积中的预测价值。方法收集2020年1月至2022年3月三门峡市中心医院行TACE术的120例肝癌病人作为研究对象,并将其分为A组(TACE... 目的探究能谱CT定量分析联合血清血管内皮生长因子(VEGF)水平检测在肝癌经导管肝动脉化疗栓塞术(TACE)后碘油沉积中的预测价值。方法收集2020年1月至2022年3月三门峡市中心医院行TACE术的120例肝癌病人作为研究对象,并将其分为A组(TACE术后碘油沉积面积>50%)和B组(TACE术后碘油沉积面积≤50%);同时分为C组(TACE术后碘油沉积区)和D组(TACE术后无碘油沉积区)。采用能谱CT检测肝癌病人TACE术前碘浓度及术后碘油沉积情况,计算动脉期标准化碘浓度(ANIC)、静脉期标准化碘浓度(VNIC)、肝脏标准化碘浓度比率(ICratio,ICratio=ANIC/VNIC),采用酶联免疫吸附法检测血清VEGF水平;绘制ROC曲线分析术前碘浓度及血清VEGF水平预测肝癌TACE术后碘油沉积情况的价值;采用多因素logistic回归分析肝癌TACE术后碘油沉积情况的影响因素。结果B组与A组肿瘤分期Ⅲ+Ⅳ期(60.29%比19.23%)、组织低分化(47.06%比23.08%)、血管侵犯(63.24%比11.54%)比例及ANIC(0.18±0.06比0.26±0.08)、VNIC(0.40±0.10比0.54±0.12)、血清VEGF[(284.56±78.17)ng/L比(225.74±61.05)ng/L]水平差异有统计学意义(P<0.05)。VEGF、组织分化程度是肝癌TACE术后1个月碘油沉积面积≤50%的影响因素(P<0.05)。D组与C组ANIC(0.15±0.04比0.24±0.07)、VNIC(0.44±0.09比0.53±0.10)、ICratio(0.34±0.08比0.45±0.09)差异有统计学意义(P<0.05)。结论能谱CT定量分析联合血清VEGF水平检测可较好地预测肝癌TACE术后碘油沉积情况。 展开更多
关键词 肝肿瘤 经导管肝动脉化疗栓塞术 能谱CT 血管内皮生长因子 碘油沉积
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热液成矿系统构造控矿理论 被引量:8
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作者 杨立强 杨伟 +6 位作者 张良 高雪 申世龙 王偲瑞 徐瀚涛 贾晓晨 邓军 《地学前缘》 EI CAS CSCD 北大核心 2024年第1期239-266,共28页
构造对成矿的控制是热液成矿系统的典型特征之一,系统剖析多重尺度控矿构造的几何学、运动学、动力学、流变学和热力学对认识矿床成因和预测找矿至关重要;而如何实现控矿构造格架、渗透性结构、成矿流体通道和矿化变形网络由静态到多尺... 构造对成矿的控制是热液成矿系统的典型特征之一,系统剖析多重尺度控矿构造的几何学、运动学、动力学、流变学和热力学对认识矿床成因和预测找矿至关重要;而如何实现控矿构造格架、渗透性结构、成矿流体通道和矿化变形网络由静态到多尺度时-空四维动态的转变,查明流体通道和矿床增量生长过程与控制因素,揭示热液成矿系统的构造-流体耦合成矿机制和定位规律是亟待解决的关键科学难题。为此,我们在对已有相关成果系统梳理的基础上,提出了科学构建热液成矿系统构造控矿理论的基本要点与对应方法及应用范畴:(1)流体而非构造是构造控矿理论的中心,热液系统的流体流动与成矿作用受控于断裂带格架及其渗透性结构,其中渗透率是将流体流动与流体压力变化联系起来理解控矿构造的核心;(2)不同控矿构造组合的关键控制是构造差应力和流体压力的大小,而矿化类型的变化可能是由于构造应力场引起的容矿构造方位的不同和赋矿围岩之间的强度差异所致;(3)流体通道的生长始于超压流体储库上游围岩中孤立的微裂隙沿流体压力梯度最大的方向、随裂隙发育且相互连结而形成新的长裂隙,并最终连通形成断裂网络内的流体通道,矿床的增量生长发生在高流体通量的短爆发期,断层反复滑动驱动其内流体压力、流速和应力快速变化,当由此诱发的流体通道生长破坏了流体系统的动态平衡时,随之而来的流体快速降压就成为金属沉淀成矿的关键驱动因素;(4)以热液裂隙-脉系统野外地质观测和构造-蚀变-矿化网络三维填图为基础,通过宏观与微观各级控矿构造相结合、地质历史与构造应力分析相结合、局部与区域点-线-面相结合、浅部与深部相结合、时间与空间相结合、定性和定量相结合,对各种控矿因素开展多学科、多尺度、多层次、全方位综合研究,是应遵循的基本原则;(5)通过构造-蚀变-矿化网络填图,将蚀变-矿化体与控矿构造的类型、形态、规模、产状和间距等几何学特征联系起来,利用热液裂隙-脉系统和断裂网络拓扑学及矿体三维几何结构分析等定量方法查明控矿构造格架和渗透性结构并揭示矿化变形网络的连通性与成矿潜力;(6)合理构建地质模型,选取合适的热力学参数和动力学边界条件,利用HCh和COMSOL等方法,定量模拟成矿过程中的流体流动、热-质传递、应力变形和化学反应等的时-空变化,是揭示构造-流体耦合成矿机理和定位规律、预测矿化中心和确定找矿目标的有效途径。进而提出了构造控矿理论的研究流程:聚焦构造-流体耦合成矿机制和定位规律这一关键科学问题,选择热液裂隙-脉系统和构造-蚀变-矿化网络为重点研究对象;通过几何学描述、运动学判断、流变学分析、动力学解析和热力学综合,厘定控矿构造格架,定位矿化中心,示踪成矿流体通道和多种矿化样式的增量生长过程及其关键控制,揭示渗透性结构的时-空演变规律及构造再活化与成矿定位的成因关联,建立构造-流体耦合成矿模式,服务新一轮战略找矿突破。以胶东焦家金矿田为例,开展控矿构造理论研究和成矿预测应用实践,证实了其科学性和有效性。 展开更多
关键词 热液裂隙-脉系统 构造-蚀变-矿化网络 渗透性结构与成矿定位 流体通道和矿床增量生长 构造-流体耦合成矿模式
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亚硒酸钠、酵母硒和富硒螺旋藻对杂交鲟幼鱼生长、抗氧化能力及组织硒含量的影响 被引量:2
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作者 陈政 刘翠 +5 位作者 刘昊昆 朱晓鸣 韩冬 杨云霞 金俊琰 解绶启 《水生生物学报》 CAS CSCD 北大核心 2024年第1期44-52,共9页
实验旨在研究饲料中不同类型和水平的硒源对杂交鲟(Acipenser baerii♂×Acipenser schrenckii♀)幼鱼生长、抗氧化能力及组织硒含量的影响。不同类型的硒源为亚硒酸钠、酵母硒和富硒螺旋藻,添加水平为0、0.4和1.2 mg/kg,制作对照饲... 实验旨在研究饲料中不同类型和水平的硒源对杂交鲟(Acipenser baerii♂×Acipenser schrenckii♀)幼鱼生长、抗氧化能力及组织硒含量的影响。不同类型的硒源为亚硒酸钠、酵母硒和富硒螺旋藻,添加水平为0、0.4和1.2 mg/kg,制作对照饲料(C)、亚硒酸钠添加饲料(S1和S2)、酵母硒添加饲料(Y1和Y2)和富硒螺旋藻添加饲料(P1和P2)。使用实验饲料饲喂初始体重为(7.82±0.12)g的杂交鲟幼鱼,养殖62d。结果表明,不同硒源和硒水平对杂交鲟幼鱼的特定生长率和饲料效率无显著影响(P>0.05)。高水平亚硒酸钠显著提高了全鱼和肝脏硒含量(P<0.05),但对肌肉和脊椎骨硒含量无显著影响(P>0.05)。高水平酵母硒和富硒藻螺旋添加组杂交鲟幼鱼的全鱼、肝脏、肌肉及脊椎骨硒含量均显著高于对照组(P<0.05)。酵母硒添加组的血浆总蛋白(TP)和总胆固醇(TC)含量均显著高于对照组(P<0.05)。同时,高水平硒添加组杂交鲟幼鱼的血浆谷胱甘肽过氧化物酶(GSH-Px)活性显著高于对照组和低水平硒添加组(P<0.05)。亚硒酸钠组肌肉硒含量与全鱼硒含量显著正相关(P<0.05),与肝脏硒含量显著负相关(P<0.05)。血浆GSH-Px活性与肌肉、脊椎骨和肝脏硒含量正相关(P<0.05)。综上所述,高水平硒添加可以提高全鱼及肝脏硒含量,不同类型硒在鱼体的蓄积模式不一致,高水平的有机硒(酵母硒和富硒螺旋藻)添加比无机硒(亚硒酸钠)更易在肌肉和脊椎骨中蓄积;高水平硒添加可显著提高杂交鲟抗氧化能力,不同硒源对杂交鲟的抗氧化能力无显著影响。 展开更多
关键词 生长 抗氧化能力 硒蓄积 杂交鲟
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黄鳝幼鳝对饲料中锌需求量的研究 被引量:1
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作者 周磊涛 黄广华 +8 位作者 周秋白 梁立文 胡运松 陈恺文 陈希环 黄浩 王自蕊 霍欢欢 吴红翔 《水生生物学报》 CAS CSCD 北大核心 2024年第7期1233-1244,共12页
为探究黄鳝(Monopterus albus)对锌的适宜需求量,以鱼粉和豆粕为蛋白源,鱼油和豆油为脂肪源配制基础实验饲料,以甘氨酸锌(Zn^(2+)≥21%)为锌源在基础饲料中分别添加0、10、20、40、80、160和320 mg/kg的锌,制成7种不同锌水平的饲料(实... 为探究黄鳝(Monopterus albus)对锌的适宜需求量,以鱼粉和豆粕为蛋白源,鱼油和豆油为脂肪源配制基础实验饲料,以甘氨酸锌(Zn^(2+)≥21%)为锌源在基础饲料中分别添加0、10、20、40、80、160和320 mg/kg的锌,制成7种不同锌水平的饲料(实际锌含量分别为48.24、60.79、70.25、88.04、123.88、204.35和381.65 mg/kg干物质),饲喂初始体重为(23.17±0.04)g的黄鳝60d,以增重率、特定生长率、脊椎骨锌含量和血清碱性磷酸酶活性等指标综合评价黄鳝锌的需求量。结果表明:(1)各组的增重率、特定生长率随饲料锌水平呈先上升后下降趋势,存活率呈下降趋势,60.79组和70.25 mg/kg组黄鳝的增重率和特定生长率较高,381.65 mg/kg组增重率、特定生长率和存活率均最低且显著低于48.24—70.25 mg/kg组,以增重率和特定生长率为评价指标,黄鳝幼鳝对锌的需求量分别为56.85和56.79 mg/kg。(2)随着饲料锌水平的升高,全鱼粗蛋白含量呈先上升后下降趋势,70.25 mg/kg组最高,粗脂肪呈先下降后平缓的趋势,48.24 mg/kg组显著高于其他组,全鱼锌含量升高、锌沉积率呈先上升后下降的趋势,黄鳝脊椎骨、肝脏、皮肤和肾脏中锌含量显著增加,脊椎骨锌含量呈先显著上升后平缓的现象;肌肉中锌含量变化不明显;全鱼铁、锰、铜、骨铁和骨锰含量呈下降趋势,骨磷和骨钙含量呈先上升后下降趋势,以脊椎骨锌含量为评价指标,黄鳝对锌的需求量为81.01 mg/kg。(3)随着饲料锌水平的升高,黄鳝血清碱性磷酸酶活力和白蛋白含量呈先上升后下降的趋势,在88.04 mg/kg组最高且显著高于204.35—381.65 mg/kg组,以血清碱性磷酸酶活力为评价指标,黄鳝幼鳝对锌的需求量为76.73 mg/kg。溶菌酶活力呈先上升后下降的趋势,60.79 mg/kg组显著高于其他组,381.65 mg/kg组血清谷丙转氨酶活性最高且显著高于48.24—70.25 mg/kg组。综合饲料锌水平对黄鳝生长性能、体成分、组织锌沉积和血清生化指标的影响,黄鳝饲料中适宜的锌需求量为56.79—81.01 mg/kg。黄鳝皮肤、脊椎骨和肝脏较肌肉更易沉积锌。 展开更多
关键词 生长性能 组织锌沉积 生化指标 黄鳝
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基于分子束外延技术可控制备Bi原子团簇的研究
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作者 马玉麟 郭祥 丁召 《原子与分子物理学报》 CAS 北大核心 2025年第2期79-84,共6页
本研究基于分子束外延(MBE)技术在Si(111)衬底表面成功制备金属Bi原子团簇.首先,分别在100℃、125℃、150℃、175℃、200℃的生长温度下,制备了大小均一、密度不同的Bi原子团簇.实验结果表明,可以通过改变生长温度来精细控制Bi原子团簇... 本研究基于分子束外延(MBE)技术在Si(111)衬底表面成功制备金属Bi原子团簇.首先,分别在100℃、125℃、150℃、175℃、200℃的生长温度下,制备了大小均一、密度不同的Bi原子团簇.实验结果表明,可以通过改变生长温度来精细控制Bi原子团簇的密度,当温度升高100℃,密度从1.05×10^(11)cm^(-2)降低至2.5×10^(7)cm^(-2),实现对团簇密度4个数量级的可控调节,并且发现Bi原子团簇密度对生长温度的依赖性符合经典成核理论.其次,分别在10 s、15 s、20 s的沉积时长下,制备了密度相同、尺寸各异的Bi原子团簇.实验结果表明,可以通过改变沉积时长来精细控制Bi原子团簇的尺寸:当沉积时长增加10 s,高度和直径分别从8.5 nm和65 nm增大到13.7 nm和100 nm,实现对团簇尺寸在10 nm高度、80 nm直径范围的可控调节,并且发现Bi原子团簇尺寸对沉积时长的依赖性符合晶体生长动力学.与分子束外延制备传统的Ⅲ族(Al,Ga,In)原子团簇做对比,这些结果可以为制备Ⅴ族原子团簇提供实验参考和指导,从而促进纳米级含Bi材料的制备. 展开更多
关键词 分子束外延 Bi原子团簇 生长温度 沉积时长 经典成核理论 晶体生长动力学
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非层状二维γ-In_(2)Se_(3)的各向异性生长及其光学特性
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作者 雷子煊 张文婷 +1 位作者 夏晓凤 王红艳 《原子与分子物理学报》 CAS 北大核心 2025年第6期58-65,共8页
非层状二维(2D)γ-In_(2)Se_(3)具有优异的光学和电学性能,在超薄柔性器件和光电探测领域具有广泛的应用前景.然而,相较于层状的类石墨烯材料,非层状材料固有的各向同性化学键,使得其二维各向异性生长面临较大的挑战.本研究构建了一种... 非层状二维(2D)γ-In_(2)Se_(3)具有优异的光学和电学性能,在超薄柔性器件和光电探测领域具有广泛的应用前景.然而,相较于层状的类石墨烯材料,非层状材料固有的各向同性化学键,使得其二维各向异性生长面临较大的挑战.本研究构建了一种新的化学气相沉积(CVD)生长策略,成功制备了高质量的2Dγ-In_(2)Se_(3).首次选用低熔点的铟粉为前驱体,有效降低了生长温度.此外,生长过程去除了CVD法合成二维硒化物时不可避免的危险气体H_(2),这不仅能有效抑制InSe副产物的形成,还降低了实验危险性.通过探究原料用量、生长温度及时间等参数对样品形貌和厚度的影响,获得了最佳生长窗口.详细表征了2Dγ-In_(2)Se_(3)的微观形貌、化学组分、晶体结构和光学特性等.结果表明,样品具有强烈的光致发光(PL)效应,与γ-In_(2)Se_(3)的直接带隙属性相吻合.随着厚度的减小,PL峰会发生蓝移,说明光学带隙随之增大.Raman光谱显示,不同厚度的样品其特征峰也会发生移动,说明厚度会影响2Dγ-In_(2)Se_(3)的分子振动行为.由此可见,通过生长参数调控2Dγ-In_(2)Se_(3)的厚度,可实现对其光学带隙和分子振动行为的调控,这将为相关的理论研究和光电器件应用提供基本的材料平台. 展开更多
关键词 非层状材料 二维γ-In_(2)Se_(3) 化学气相沉积 各向异性生长 带隙
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冷季不同饲养管理模式对牦牛生长、脂肪沉积及养殖效益的影响
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作者 张振祥 曹铨 +10 位作者 丁路明 俞旸 刘文亭 杨晓霞 张春平 刘玉祯 冯斌 于泽航 吕卫东 周玉青 董全民 《草地学报》 CAS CSCD 北大核心 2024年第1期305-313,共9页
冷季不同饲养管理模式对牦牛生长性能、脂肪沉积及养殖经济效益等产生重要影响。本研究在冷季分别对公牦牛进行自然放牧(SEG1组)和投喂不同粗精比的饲粮,结果表明:与SEG1组相比,补饲组牦牛平均日增重(ADG)显著提高(P<0.05);补饲组碱... 冷季不同饲养管理模式对牦牛生长性能、脂肪沉积及养殖经济效益等产生重要影响。本研究在冷季分别对公牦牛进行自然放牧(SEG1组)和投喂不同粗精比的饲粮,结果表明:与SEG1组相比,补饲组牦牛平均日增重(ADG)显著提高(P<0.05);补饲组碱性磷酸酶(ALP)、总胆固醇(TC)、甘油三酯(TG)、葡萄糖(GLU)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、游离脂肪酸(NEFA)、脂肪酸合成酶(FAS)和脂蛋白脂酶(LPL)含量显著高于SEG1组(P<0.05);各补饲组牦牛肝脏组织内脂滴表达面积百分比显著高于SEG1组(P<0.05),各补饲组之间也存在显著差异(P<0.05);与SEG1组相比,SEC50组、SEC30组和SEC10组牦牛养殖利润分别提高228.77%,258.69%和115.52%。综上所述,冷季补饲管理可有效提高牦牛的生长性能,增强机体脂肪沉积和代谢功能,提高牦牛养殖经济效益,补饲饲粮粗精料比为70∶30效果最佳。 展开更多
关键词 牦牛 饲养管理模式 生长性能 脂肪沉积 经济效益
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饲粮中添加二氢杨梅素对湖羊羔羊生长性能、营养代谢和瘤胃微生物蛋白合成的影响 被引量:1
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作者 孙硕 郝小燕 +4 位作者 张暄梓 何甜 高秀杰 申玉萍 张建新 《动物营养学报》 CAS CSCD 北大核心 2024年第7期4521-4530,共10页
本试验旨在研究饲粮中添加二氢杨梅素(DMY)对湖羊羔羊生长性能、营养代谢和瘤胃微生物蛋白合成的影响。试验选取48只体态良好、体重[平均体重为(25.31±1.18)kg]相近的4月龄纯种湖羊公羔进行饲养试验,将所有试验羊随机分为4组,分别... 本试验旨在研究饲粮中添加二氢杨梅素(DMY)对湖羊羔羊生长性能、营养代谢和瘤胃微生物蛋白合成的影响。试验选取48只体态良好、体重[平均体重为(25.31±1.18)kg]相近的4月龄纯种湖羊公羔进行饲养试验,将所有试验羊随机分为4组,分别在基础饲粮中添加0(对照组)、400(400DMY组)、800(800DMY组)、1200 mg/kg(1200DMY组)DMY,每组12只,单栏饲养。饲养试验90 d,其中预试期15 d,正试期75 d;消化代谢试验10 d,预试期5 d,正试期5 d。结果表明:1)与对照组相比,800DMY组终末体重、平均日增重显著提高(P<0.05),且料重比显著降低(P<0.05)。2)800DMY组干物质表观消化率与对照组相比显著提高(P<0.05),3个试验组有机物表观消化率均显著高于对照组(P<0.05),800DMY组、1200DMY组中性洗涤纤维表观消化率显著高于对照组与400DMY组(P<0.05),800DMY组、1200DMY组酸性洗涤纤维表观消化率与对照组相比显著提高(P<0.05)。3)3个试验组粪能与对照组相比显著降低(P<0.05)。同时,400DMY组、800DMY组、1200DMY组总能表观消化率则显著高于对照组(P<0.05)。4)在800DMY组中,尿氮含量显著低于对照组、400DMY组和1200DMY组(P<0.05)。同时,800DMY组的沉积氮和氮沉积率显著高于对照组、400DMY组和1200DMY组(P<0.05)。800DMY组微生物蛋白合成量与对照组相比显著增加(P<0.05)。根据以上结果得出,将适当剂量DMY添加到湖羊羔羊的育肥饲粮中表现出提高平均日增重,并降低料重比的效果,同时提升粗饲料利用率,提高能量利用效率及机体氮沉积效率,对于湖羊育肥具有积极意义。在本试验条件下,饲粮中DMY的适宜添加量为800 mg/kg。 展开更多
关键词 二氢杨梅素 湖羊 生长性能 表观消化率 氮沉积 微生物蛋白
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乙二胺四乙酸铁钠对肉仔鸡生长性能和组织中铜、锌和锰元素沉积的影响
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作者 吴炳鑫 朱玲 +8 位作者 李鼎 高飞宇 吴伟 胡云 崔小燕 李婷婷 张丽阳 汪圣晨 罗绪刚 《中国家禽》 北大核心 2024年第3期30-36,共7页
试验旨在研究饲粮添加乙二胺四乙酸铁钠(NaFeEDTA)对肉仔鸡生长性能和不同组织中铜、锌和锰沉积的影响。试验按3(铁源)×3(添加铁水平)+1(不加铁对照组)双因子完全随机试验设计,将560只1日龄AA肉公鸡随机分成10组,每组7个重复,每个... 试验旨在研究饲粮添加乙二胺四乙酸铁钠(NaFeEDTA)对肉仔鸡生长性能和不同组织中铜、锌和锰沉积的影响。试验按3(铁源)×3(添加铁水平)+1(不加铁对照组)双因子完全随机试验设计,将560只1日龄AA肉公鸡随机分成10组,每组7个重复,每个重复8只鸡,分别饲喂未添加铁的玉米-豆粕型基础日粮(对照组)和在此基础日粮中分别添加20、40和60 mg/kg铁(分别源于硫酸亚铁(FeSO_(4)·7H_(2)O)、饲料级NaFeEDTA和食品级NaFeEDTA的饲粮21 d。结果显示:与FeSO_(4)·7H_(2)O组相比,饲粮添加不同来源的NaFeEDTA对肉仔鸡生长性能无显著影响(P>0.05);食品级和饲料级NaFeEDTA组心脏中铜、胫骨中锌以及肝脏和胫骨中锰元素的含量显著提高(P<0.05)。由此可见,添加NaFeEDTA从整体上促进了肉仔鸡心脏中铜、胫骨中锌以及肝脏和胫骨中锰元素的沉积。 展开更多
关键词 肉仔鸡 乙二胺四乙酸铁钠 铁水平 生长性能 矿物元素沉积
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基于图形衬底表面化学水浴法的硫化铅薄膜均匀性研究
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作者 马睿 杨冬 +1 位作者 冷重钱 申钧 《红外》 CAS 2024年第11期17-27,共11页
硫化铅(PbS)等铅盐材料因较低的俄歇复合系数,是非制冷红外探测领域中备受关注的材料。化学水浴法被广泛用于硫化铅等薄膜的制备。然而该方法在图形化衬底上存在薄膜生长不均匀的问题。基于多次曝光显影技术,比较了不同预处理工艺对图... 硫化铅(PbS)等铅盐材料因较低的俄歇复合系数,是非制冷红外探测领域中备受关注的材料。化学水浴法被广泛用于硫化铅等薄膜的制备。然而该方法在图形化衬底上存在薄膜生长不均匀的问题。基于多次曝光显影技术,比较了不同预处理工艺对图形化衬底上薄膜生长均匀性的影响,在金属和绝缘衬底表面上均实现了硫化铅薄膜的均匀生长。基于优选预处理方法制备的硫化铅探测器的结果表明,图形衬底预处理可明显改善探测器在光电流、响应度和噪声等方面的性能,其中响应度可提升1.2倍。本文提供的硫化铅薄膜制备方法,不仅可在图形化衬底上生长均匀性一致的硫化铅薄膜,还可以修复受损衬底,有利于在读出电路表面实现硫化铅基焦平面阵列探测器的一体化加工。 展开更多
关键词 化学水浴法 硫化铅 生长均匀性 光电探测器 红外探测器
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