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Unruh Metric Tensor HUP via Planckian Space-Time Compared to HUP Based Complexity of Measured System Results to Obtain Inflaton Potential Magnitude
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作者 Andrew Walcott Beckwith 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第4期1628-1642,共15页
First of all, we restate a proof of a highly localized special case of a metric tensor uncertainty principle first written up by Unruh. Unruh did not use the Roberson-Walker geometry which we do, and it so happens tha... First of all, we restate a proof of a highly localized special case of a metric tensor uncertainty principle first written up by Unruh. Unruh did not use the Roberson-Walker geometry which we do, and it so happens that the dominant metric tensor we will be examining, is variation in δgtt. The metric tensor variations given by δgrr, δgθθand δgϕϕare negligible, as compared to the variation δgtt. Afterwards, what is referred to by Barbour as emergent duration of time δtis from the Heisenberg Uncertainty principle (HUP) applied to δgttin such a way as to be compared with ΔxΔp≥ℏ2+γ˜∂C∂Vwith V here a volume spatial term and γ˜a complexification strength term and ∂C∂Vinfluence of complexity of physical system being measured in order to obtain a parameterized value for the initial value of an inflaton which we call V0. 展开更多
关键词 Massive Gravitons Heisenberg Uncertainty Principle (hup)
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How 5 Dimensions May Fix a Deterministic Background Spatially as to Be Inserted for HUP in 3 + 1 Dimensions, and Its Relevance to the Early Universe 被引量:1
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作者 Andrew Walcott Beckwith 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2023年第1期1-6,共6页
We will first of all reference a value of momentum, in the early universe. This is for 3 + 1 dimensions and is important since Wesson has an integration of this momentum with regards to a 5 dimensional parameter inclu... We will first of all reference a value of momentum, in the early universe. This is for 3 + 1 dimensions and is important since Wesson has an integration of this momentum with regards to a 5 dimensional parameter included in an integration of momentum over space which equals a ration of L divided by small l (length) and all these times a constant. The ratio of L over small l is a way of making deterministic inputs from 5 dimensions into the 3 + 1 dimensional HUP. In doing so, we come up with a very small radial component for reasons which due to an argument from Wesson is a way to deterministically fix one of the variables placed into the 3 + 1 HUP. This is a deterministic input into a derivation which is then First of all, we restate a proof of a highly localized special case of a metric tensor uncertainty principle first written up by Unruh. Unruh did not use the Roberson-Walker geometry which we do, and it so happens that the dominant metric tensor we will be examining, is variation in δg<sub>tt</sub>. The metric tensor variations are given by δg<sub>rr</sub>, δg<sub>θθ</sub> and δg<sub>φφ</sub> are negligible, as compared to the variation δg<sub>tt</sub>. From there the expression for the HUP and its applications into certain cases in the early universe are strictly affected after we take into consideration a vanishingly small r spatial value in how we define δg<sub>tt</sub>. 展开更多
关键词 Massive Gravitons Heisenberg Uncertainty Principle (hup) Riemannian-Penrose Inequality
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How 5 Dimensions May Fix a Deterministic Background Spatially as to Be Inserted for HUP in 3 + 1 Dimensions, and Its Relevance to the Early Universe? Criteria for Massive Graviton Detection from Relic Conditions Mentioned
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作者 Andrew Walcott Beckwith 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2023年第1期108-115,共8页
We will first of all reference a value of momentum, in the early universe. This is for 3 + 1 dimensions and is important since Wesson has an integration of this momentum with regards to a 5 dimensional parameter inclu... We will first of all reference a value of momentum, in the early universe. This is for 3 + 1 dimensions and is important since Wesson has an integration of this momentum with regards to a 5 dimensional parameter included in an integration of momentum over space which equals a ration of L divided by small l (length) and all these times a constant. The ratio of L over small l is a way of making deterministic inputs from 5 dimensions into the 3 + 1 dimensional HUP. In doing so, we come up with a very small radial component for reasons which due to an argument from Wesson is a way to deterministically fix one of the variables placed into the 3 + 1 HUP. This is a deterministic input into a derivation which is then, first of all, we restate a proof of a highly localized special case of a metric tensor uncertainty principle first written up by Unruh. Unruh did not use the Roberson-Walker geometry which we do, and it so happens that the dominant metric tensor we will be examining is variation in δg<sub>tt</sub>. We state that the metric tensor variations are given by δg<sub>rr</sub>, δg<sub>θθ</sub> and δg<sub>φφ</sub> are negligible contributions, as compared to the variation δg<sub>tt</sub>. From there the expression for the HUP and its applications into certain cases in the early universe are strictly affected after we take into consideration a vanishingly small r spatial value in how we define δg<sub>tt</sub>. 展开更多
关键词 Massive Gravitons Heisenberg Uncertainty Principle (hup) Riemannian-Penrose Inequality
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BFS-HUP模型在潼关站洪水概率预报中的应用 被引量:8
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作者 蒋晓蕾 梁忠民 +2 位作者 王春青 刘晓伟 刘龙庆 《人民黄河》 CAS 北大核心 2015年第7期13-15,21,共4页
采用马斯京根演算法作为确定性预报模型,并选用贝叶斯预报系统(BFS)的水文不确定性处理器(HUP)作为概率预报模型,获得预报变量的概率分布,实现黄河潼关站洪水的概率预报。将预报变量概率分布的中位数作为定值预报与确定性预报进行对比,... 采用马斯京根演算法作为确定性预报模型,并选用贝叶斯预报系统(BFS)的水文不确定性处理器(HUP)作为概率预报模型,获得预报变量的概率分布,实现黄河潼关站洪水的概率预报。将预报变量概率分布的中位数作为定值预报与确定性预报进行对比,发现预报精度有所提高,表明贝叶斯模型的预报校正能力较强。通过设定不同确定性预报精度的情景方案,探讨了确定性预报精度对概率预报可靠度的影响。结果表明,随着确定性预报精度的提高,概率预报区间宽度和离散度均有所减小;HUP洪水概率预报的可靠度对确定性预报的偶然性误差比较敏感,对系统偏差相对不敏感。 展开更多
关键词 贝叶斯预报系统(BFS) 水文不确定性处理器(hup) 洪水概率预报 潼关
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含吸氢酶基因(hup)嵌合质粒的构建和吸氢酶活性在阴沟肠杆菌中的表达 被引量:6
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作者 吴永强 朱美珍 +2 位作者 梁建光 华征 宋鸿遇 《植物生理学报(0257-4829)》 CSCD 1996年第3期209-217,共9页
以质粒pRK404为载体亚克隆含大豆根瘤菌吸氢酶结构基因(hup)的片段,构建成嵌合质粒pHR11、pHR4和pHR10。通过三亲本杂交将这些嵌合质粒导入无吸氢活性的Rhodobactersphaeroides241... 以质粒pRK404为载体亚克隆含大豆根瘤菌吸氢酶结构基因(hup)的片段,构建成嵌合质粒pHR11、pHR4和pHR10。通过三亲本杂交将这些嵌合质粒导入无吸氢活性的Rhodobactersphaeroides241菌株(Hup-),均获得Hup+的接合子。利用启动子检测质粒pMP220证明,在hup对结构基因上游1.2kb内存在hup启动基因片段。以pRK2013为助质粒可将pHR11导入Enterobactercloacae和Klebsiellaoxytoca等土壤固氮菌株。本文以接合子E.cloacaeEH1113为例,通过对基因组DNASouthern杂交分析证明,嵌合质粒pHR11在EH1113中稳定贮存和复制。H2诱导接合子EH1113吸氢酶活性高表达,吸氢活性与放氢活性比值约为对照的两倍。当以延胡索酸为电子受体时,吸氢酶的吸氢作用支持菌株固氮酶活性的提高。 展开更多
关键词 固氮细菌 吸氢酶基因 南粒 吸氢酶 阴沟肠杆菌
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交通地下空间体系建设发展对策研究
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作者 肖旦强 詹伟 +3 位作者 胡智 严鑫 余以强 吴剑军 《岩土工程学报》 EI CAS CSCD 北大核心 2024年第S02期130-134,共5页
工业化、城市化的快速推进导致城市用地紧缺、交通拥堵等问题日益突出,交通地下空间开发通过统筹考虑地下、地面和地上的开发和利用,打造综合枢纽,形成立体交通,已经成为提升交通系统整体运行效率的重要解决方案。各地的城市交通地下空... 工业化、城市化的快速推进导致城市用地紧缺、交通拥堵等问题日益突出,交通地下空间开发通过统筹考虑地下、地面和地上的开发和利用,打造综合枢纽,形成立体交通,已经成为提升交通系统整体运行效率的重要解决方案。各地的城市交通地下空间正进入快速建设时期,其深度和广度显著提升,引起了一系列全新的难题和挑战。结合国内交通地下空间开发及政策现状,从时间、空间和类型等多个层面总结先进经验,并从中梳理制约交通地下空间发展的问题与难点,针对提出的重难点问题,提出交通地下空间发展总体思路与对策,对未来交通地下空间的建设开发给予建议和参考。 展开更多
关键词 交通地下空间 地下枢纽 开发政策 发展对策
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浑球红细菌Rhodobacter sphaeroides吸氨酶(hup)基因簇的分离与鉴定
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作者 梁建光 吴永强 +2 位作者 宋鸿遇 AnnetteColbeau PauletteM.Vignais 《植物生理学报(0257-4829)》 CSCD 1998年第3期233-239,共7页
以Rhodobactercapsulatus的hopS’L基因DNA片段为探针,通过Southem杂交,从构建的Rhodobactersphaeroides601基因库中调取hup基因。阳性克隆Cosmid1可与Hup突变株JP91(HupS-)、RCC8(HupR-)以及BSE8(HupT-)互补,而Cosmid3和Cosm... 以Rhodobactercapsulatus的hopS’L基因DNA片段为探针,通过Southem杂交,从构建的Rhodobactersphaeroides601基因库中调取hup基因。阳性克隆Cosmid1可与Hup突变株JP91(HupS-)、RCC8(HupR-)以及BSE8(HupT-)互补,而Cosmid3和Cosmid9只能与BSE8互补;试验所产生的接合转移子均恢复了吸氢酶的活性和自养生长能力、将Cosmidl的3.5kbPstⅠ和4.5kbBamHⅠ片段分别亚克隆到pWY11和pWY10中。pWY11和pWY10的部分DNA序列与R.capsulatus中的相关基因具有很高的同源性,从而证明了所得到的Cosmid1确实含有R.sphaeroides的基因簇。 展开更多
关键词 浑球红细菌 吸氢酶 基因簇 hup基因
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含hup基因的质粒在催娩克氏杆菌中的稳定性及吸氢酶的表达
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作者 黄黎 梁建光 吴永强 《植物生理学报(0257-4829)》 CSCD 2001年第1期15-20,共6页
以质粒 pKT2 30为载体 ,亚克隆大豆根瘤菌吸氢酶结构基因 (hupSL )片段 ,构建成嵌合质粒pKH1。将质粒分配系统基因 ( parDE)片段和吸氢酶结构基因 (hup )片段插入载体质粒pRK415 ,构建成质粒 pRKBH。质粒 pKH1、pRKBH和载体 pRK415经转... 以质粒 pKT2 30为载体 ,亚克隆大豆根瘤菌吸氢酶结构基因 (hupSL )片段 ,构建成嵌合质粒pKH1。将质粒分配系统基因 ( parDE)片段和吸氢酶结构基因 (hup )片段插入载体质粒pRK415 ,构建成质粒 pRKBH。质粒 pKH1、pRKBH和载体 pRK415经转化和三亲本杂交 ,得到DH5α/pHR11、DH5α/pRKBH、E12 0 1/pKH1、NG13/pKH1(NGH999)、NG1390 /pRK415、NG1390 /pHR11、NG1390 /pRKBH和NG1390 /pKH1(NGH982 )等接合子。稳定性分析发现 ,质粒 pKH1在催娩克氏杆菌中传 80代后仍有92 %以上的菌株含此质粒 ,说明质粒 pKH1有较高的稳定性。吸氢酶活性分析表明 ,H2 诱导接合子NGH999和NGH982吸氢酶活性高表达 ,同时固氮效率和固氮酶活性也高。低碳源浓度更有利于接合子吸氢酶活性的表达和固氮效率的提高。接合子NGH982具有耐铵的基因 。 展开更多
关键词 催娩克氏杆菌 质粒稳定性 吸氢酶活性 吸氢酶基因 水稻 固氮菌
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紫云英根瘤菌Hup°菌株吸氢与固氮
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作者 孙金华 陈秉俭 +2 位作者 郁宝麟 杨玉锁 宋鸿遇 《植物生理学报(0257-4829)》 CSCD 1991年第3期290-294,共5页
紫云英根瘤菌109菌株经NTG诱变后,选出1027,1247,1439,1675 4株菌株,其生长比野生型109菌株快,而其吸氢活性对碳底物不敏感或部分敏感,称为Hup°菌株。菌株1675和1439形成的根瘤其吸氢前的滞后时间缩短,表明内源抑制吸氢的效应缓解... 紫云英根瘤菌109菌株经NTG诱变后,选出1027,1247,1439,1675 4株菌株,其生长比野生型109菌株快,而其吸氢活性对碳底物不敏感或部分敏感,称为Hup°菌株。菌株1675和1439形成的根瘤其吸氢前的滞后时间缩短,表明内源抑制吸氢的效应缓解。经回接,1675菌株的Hup°性状较1439菌株稳定。由根瘤内分离回收的1675-1和1675-32两菌株,其共生体的吸氢与固氮活性均比菌株109高,其根瘤的耗氧量比109根瘤低,说明1675菌株有利于根瘤累积碳底物。 展开更多
关键词 紫云英 根瘤菌 hup^c菌株 吸氢
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几种水稻联合固氮菌吸氢酶(hup)基因的鉴定及分析
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作者 苑红丽 王惠贤 尤崇杓 《核农学报》 CAS CSCD 1990年第1期19-24,共6页
供试菌株Alcaligenes faecalis A15,Enterobacter cloacae EnSs.E·cl-oacae E26,Klebsiella planticola DWUL2.K·oxytoca NG13和Pseudomonassacharophila均能还原2,3,5-氯化三苯基四氮唑(TTC),说明它们含有吸氢酶。以Rhizobiu... 供试菌株Alcaligenes faecalis A15,Enterobacter cloacae EnSs.E·cl-oacae E26,Klebsiella planticola DWUL2.K·oxytoca NG13和Pseudomonassacharophila均能还原2,3,5-氯化三苯基四氮唑(TTC),说明它们含有吸氢酶。以Rhizobium japonicum的hup基因为探针进行杂交的结果表明。除E·oloacae E26和K·oxytoca NG13外,其它菌株的DNA与hup探针具有同源性。A·faecalis A15 hup基因位于染色体上‘E·cloacae EnSs则位于较大的一个质粒上。A·faecalis A15和E·Cloacae EnSs的nif基因与hup基因位于同一复制子上。hup基因不具必然的保守性,因此异源hup基因探针不一定都适宜于探测hup基因。 展开更多
关键词 水稻 联合固氮菌 吸氢酶 基因 固氮
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The Transition from Pre-Octonionic to Octonionic Gravity and How It May Be Pertinent to a Re-Do of the HUP for Metric Tensors 被引量:1
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作者 Andrew Walcott Beckwith 《Journal of High Energy Physics, Gravitation and Cosmology》 2017年第4期727-753,共27页
The quantum gravity problem that the notion of a quantum state, representing the structure of space-time at some instant, and the notion of the evolution of the state, does not get traction, since there are no real “... The quantum gravity problem that the notion of a quantum state, representing the structure of space-time at some instant, and the notion of the evolution of the state, does not get traction, since there are no real “instants”, is avoided by having initial Octonionic geometry embedded in a larger, nonlinear “pilot model” (semi classical) embedding structure. The Penrose suggestion of recycled space time avoiding a “big crunch” is picked as the embedding structure, so as to avoid the “instants” of time issue. Getting Octionic gravity as embedded in a larger, Pilot theory embedding structure may restore Quantum Gravity to its rightful place in early cosmology without the complication of then afterwards “Schrodinger equation” states of the universe, and the transformation of Octonionic gravity to existing space-time is explored via its possible linkage to a new version of the HUP involving metric tensors. We conclude with how specific properties of Octonion numbers algebra influence the structure and behavior of the early-cosmology model. This last point is raised in Section 14, and is akin to a phase transition from Pre-Octonionic geometry, in pre-Planckian space-time, to Octonionic geometry in Planckian space-time. A simple phase transition is alluded to;making this clear is as simple as realizing that Pre-Octonionic is for Pre-Planckian Space-time and Octonionic is for Planckian Space-time. We state that the Standard Model of physics occurs during Planckian Space-time. We also argue that the Standard Model does not apply to Pre Planckian Space-time. This is commensurate with the Octonion number system NOT applying in pre-Planckian space-time, but applying in Plankian space-time. And the last line of Equation (54) gives a minimum time step in pre-Planckian space-time when we do NOT have the Standard Model of physics, or Octonionic Geometry. 展开更多
关键词 Octonionic Geometry CYCLIC CONFORMAL COSMOLOGY (Penrose) Modified hup
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Reconsidering “Does the Sum Rule Hold at the Big Bang?” with Pre Planckian HUP, and Division Algebras 被引量:1
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作者 Andrew W. Beckwith 《Journal of High Energy Physics, Gravitation and Cosmology》 2017年第4期539-557,共19页
In 2012, the author submitted an article to the Prespacetime Journal based upon the premise of inquiry as to the alleged vanishing of disjoint open sets contributing to quantum vector measures no longer working, i.e. ... In 2012, the author submitted an article to the Prespacetime Journal based upon the premise of inquiry as to the alleged vanishing of disjoint open sets contributing to quantum vector measures no longer working, i.e. the solution in 2012 was that the author stated that quantum measures in 4 dimensions would not work, mandating, if measure theory were used, imbedding in higher dimensions was necessary for a singularity. The idea was to use the methodology of String Theory as to come up with a way out of the impasse if higher dimensions do not exist. We revisit this question, taking into account a derived HUP, for metric tensors if we look at Pre-Planckian space-time introducing a pre-quantum mechanical HUP which may be a way to ascertain a solution not mandating higher dimensions, as well as introducing cautions as to what will disrupt the offered solution. Note that first, measurable spaces allow disjoint sets. Also, that smooth relations alone do not define separability or admit sets Planck’s length, if it exists, is a natural way to get about the “bad effects” of a cosmic singularity at the beginning of space-time evolution, but if a development is to be believed, namely by Stoica in the article, about removing the cosmic singularity as a breakdown point in relativity, there is nothing which forbids space-time from collapsing to a point. Without the use of a Pre Planckian HUP, for metric tensors, the quantum measures in four dimensions break down. We try to ascertain if a Pre Planckian HUP is sufficient to avoid this pathology and also look at if division algebras which can link Octonionic geometry and E8, to Quark spinors, in the standard model and add sufficient definition to the standard model are necessary and sufficient conditions for a metric tensor HUP which may remove this breakdown of the sum rule in the onset of the “Big Bang”. 展开更多
关键词 Quantum Measures Spatial DIFFEOMORPHISM Cylinder SETS Caratheodary-Hahn-Huvanek Theorem Big Bang Singularity Causal SETS Modified PRE Planckian HEISENBERG Uncertainty Principle hup Division ALGEBRAS
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Gedanken Experiment for Looking at δgtt for Initial Expansion of the Universe and Influence on HUP via Dynamical Systems, with Positive Pre-Planckian Acceleration 被引量:1
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作者 Andrew Walcott Beckwith 《Journal of High Energy Physics, Gravitation and Cosmology》 2016年第4期531-545,共15页
We examine through the lens of dynamical systems a “one dimensional” time mapping of emergent VEV from Pre-Planckian space time conditions. As it is, we will from first principles examine what adding acceleration do... We examine through the lens of dynamical systems a “one dimensional” time mapping of emergent VEV from Pre-Planckian space time conditions. As it is, we will from first principles examine what adding acceleration does as to the HUP previously derived. In doing so, we will be trying it in our discussion with the earlier work done on the HUP. not equal to zero, constant, but large would frequently imply which would have three dissimilar real valued roots. And the situation with not equal to zero yields more tractable result for which will have implications for the HUP inequality in Pre-Planckian space-time, and buttresses an analysis of a 1 dimensional “time” mapping for emergent VEV (vacuum expectation values). 展开更多
关键词 hup Dynamical Systems
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基于PCA-HUP模型的洪水预报不确定性分析——以信江流域梅港站为例
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作者 冻芳芳 刘沁薇 +1 位作者 王淑梅 刘建伟 《人民长江》 北大核心 2021年第4期22-26,共5页
针对梅港站洪水预报过程中存在的不确定性,采用主成分分析技术(PCA)与水文不确定性处理器(HUP)耦合的PCA-HUP模型,对梅港站洪水预报不确定性进行了分析,并提供了中位数(Q50)定值预报和90%置信度下的预报区间成果。结果表明:就确定性系... 针对梅港站洪水预报过程中存在的不确定性,采用主成分分析技术(PCA)与水文不确定性处理器(HUP)耦合的PCA-HUP模型,对梅港站洪水预报不确定性进行了分析,并提供了中位数(Q50)定值预报和90%置信度下的预报区间成果。结果表明:就确定性系数和洪峰相对误差指标而言,PCA-HUP模型的Q50定值预报成果优于原模型的定值预报成果;就离散度和覆盖率指标而言,PCA-HUP模型90%置信度下的预报区间具有较小的离散度且保证了较高的覆盖率。总体而言,PCA-HUP模型具有较高的精度及可靠性。 展开更多
关键词 洪水预报 不确定性分析 PCA-hup模型 梅港站 信江流域
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大渡河猴子岩水库入库洪水过程预报-实时校正-概率预报集成
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作者 李彬权 朱畅畅 +3 位作者 梁忠民 陈云瑶 蒋晓蕾 张涛涛 《湖泊科学》 EI CAS CSCD 北大核心 2023年第4期1481-1490,共10页
与传统确定性预报相比,洪水概率预报能够为防洪调度决策提供更为丰富的信息。以大渡河猴子岩水库以上流域为研究区,建立新安江次洪模型,并采用动态系统响应曲线进行实时洪水预报校正。在确定性预报校正基础上,建立基于水文不确定性处理... 与传统确定性预报相比,洪水概率预报能够为防洪调度决策提供更为丰富的信息。以大渡河猴子岩水库以上流域为研究区,建立新安江次洪模型,并采用动态系统响应曲线进行实时洪水预报校正。在确定性预报校正基础上,建立基于水文不确定性处理器(HUP)的次洪概率预报模型,定量分析预报不确定性,实现入库洪水概率预报。结果表明:①利用猴子岩流域20092019年水文气象资料,建立的新安江次洪模型整体精度较高,率定期和验证期的洪量和洪峰相对误差均在±20%以内,平均确定性系数分别为0.69和0.72;经动态系统响应曲线校正后,洪峰和洪量误差均有降低,率定期和验证期的确定性系数分别提高0.13和0.09。②以2020年3场洪水未来48 h预报降雨为输入,新安江模型预报精度不高,且随着预见期增长而降低,但经动态系统响应曲线校正后,整体预报精度有所提高,洪量相对误差减小幅度超50%,确定性系数提高幅度超60%。③HUP次洪概率预报模型提供的分布函数中位数Q50的预报精度在一定程度上优于校正后的确定性预报;提供的90%置信区间覆盖率均在90%左右,离散度均在0.40以下,能以相对较窄的区间覆盖大部分实测值,具有较高的可靠度。 展开更多
关键词 新安江模型 动态系统响应曲线 水文不确定性处理器 概率预报 大渡河流域 猴子岩水库
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Using “Particle Density” of “Graviton Gas”, to Obtain Value of Cosmological Constant
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作者 Andrew Beckwith 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2023年第1期168-173,共6页
We use the work of de Vega, Sanchez, and Comes (1997), to approximate the “particle density” of a “graviton gas”. This “particle density” derivation is compared with Dolgov’s (1997) expression of the Vacuum ene... We use the work of de Vega, Sanchez, and Comes (1997), to approximate the “particle density” of a “graviton gas”. This “particle density” derivation is compared with Dolgov’s (1997) expression of the Vacuum energy in terms of a phase transition. The idea is to have a quartic potential, and then to utilize the Bogomol’nyi inequality to refine what the phase transition states. We utilize Ng, Infinite quantum information procedures to link our work with initial entropy and other issues and close with a variation in the HUP: at the start of the expansion of the universe. 展开更多
关键词 Graviton Gas Partition Function Modified hup Symmetry Breaking Potential
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HPLC法测定蛇足石杉中石杉碱甲含量 被引量:32
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作者 孙远明 余红英 +2 位作者 杨跃生 杨金易 张明 《中草药》 CAS CSCD 北大核心 2002年第12期1078-1080,共3页
目的 考察蛇足石杉不同产地、不同部位中石杉碱甲 (Hup A)和总碱含量 ;比较不同提取方法对石杉碱甲含量的影响。方法 采用 RP- HPL C法测定 Hup A的含量。结果  Hup A在根、茎、叶中的含量为茎、叶 >根 ;贵州、广东和安徽产地的 H... 目的 考察蛇足石杉不同产地、不同部位中石杉碱甲 (Hup A)和总碱含量 ;比较不同提取方法对石杉碱甲含量的影响。方法 采用 RP- HPL C法测定 Hup A的含量。结果  Hup A在根、茎、叶中的含量为茎、叶 >根 ;贵州、广东和安徽产地的 Hup A含量分别为 0 .0 18% ,0 .0 2 1% ,0 .0 2 0 % ,提取方法之间差异不显著。结论  Hup A含量在蛇足石杉中的分布为地上部分大于地下部分。不同产地 Hup A含量有一定差异。 展开更多
关键词 HPLC法 蛇足石杉 石杉碱甲 石杉总碱 含量测定
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立位负荷量增加时压力感受器反射功能的变化 被引量:4
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作者 沈羡云 谢宝生 +3 位作者 孟京瑞 程方 薛月英 路盛强 《航天医学与医学工程》 CAS CSCD 1992年第1期55-60,共6页
为了了解立位负荷量增加和中枢对压力感受器反射功能的影响,本实验观察了8名被试者在两种不同方式(加心算和无心算)的递增性负压—立位负荷时(下身负压值为0、2.67、5.33、8.00kPa)BRF的变化。结果表明压力感受器反射增益随着立位负荷... 为了了解立位负荷量增加和中枢对压力感受器反射功能的影响,本实验观察了8名被试者在两种不同方式(加心算和无心算)的递增性负压—立位负荷时(下身负压值为0、2.67、5.33、8.00kPa)BRF的变化。结果表明压力感受器反射增益随着立位负荷量的增加而增加,但在极限负荷时增益下降,反射功能的降低是造成立位晕厥的主要原因。立位中加心算后,反射增益和负荷量的关系不密切,说明中枢兴奋对立位时压力感受器的反射功能有抑制作用。 展开更多
关键词 负压 立位 压力感受器 反射功能
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石杉碱甲的含量测定方法及在蛇足石杉不同产地居群中的含量比较 被引量:9
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作者 郭水良 李沛玲 +2 位作者 李似姣 方芳 吴廷华 《浙江师范大学学报(自然科学版)》 CAS 2006年第2期177-180,共4页
采用Waters 1525-2487高效液相色谱仪,测定了产自浙江遂昌大西坑、遂昌九龙山、磐安大盘山、庆元百山祖、临安西天目山、金华南山、金华北山和福建武夷山等8个产地居群蛇足石杉(茎叶)中石杉碱甲的含量.结果发现,磐安大盘山居群蛇足石杉... 采用Waters 1525-2487高效液相色谱仪,测定了产自浙江遂昌大西坑、遂昌九龙山、磐安大盘山、庆元百山祖、临安西天目山、金华南山、金华北山和福建武夷山等8个产地居群蛇足石杉(茎叶)中石杉碱甲的含量.结果发现,磐安大盘山居群蛇足石杉的石杉碱甲含量最高,百山祖和天目山居群的含量最低.因此,人工栽培时可以考虑以磐安大盘山产的蛇足石杉作为种源,并注意以该居群生长环境条件作为栽培的参数. 展开更多
关键词 蛇足石杉 石杉碱甲 高效液相色谱 产地居群
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石杉碱甲透皮控释制剂督脉经穴给药改善东莨菪碱小鼠记忆障碍作用及机理初探 被引量:11
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作者 史红 叶金翠 +2 位作者 钱伯初 张望刚 陈国神 《中国临床药理学与治疗学》 CAS CSCD 2002年第6期489-492,共4页
目的 :观察石杉碱甲透皮控释贴片 (Hup ATDDS)督脉穴位给药对东莨菪碱 (Scop)致小鼠学习记忆障碍的影响 ,比较穴位给药与一般部位给药的作用差异 ,探讨督脉穴位给药机理 ,为穴位透皮控释给药新途径提供初步实验依据。方法 :采用跳台、“... 目的 :观察石杉碱甲透皮控释贴片 (Hup ATDDS)督脉穴位给药对东莨菪碱 (Scop)致小鼠学习记忆障碍的影响 ,比较穴位给药与一般部位给药的作用差异 ,探讨督脉穴位给药机理 ,为穴位透皮控释给药新途径提供初步实验依据。方法 :采用跳台、“Y”迷宫等行为药理学实验方法 ,观察Hup ATDDS穴位给药与一般部位给药对Scop小鼠记忆障碍的改善作用 ,并以小鼠脑胆碱酯酶活性等指标初步探讨穴位给药的作用机理。结果 :跳台试验和电迷宫试验表明 ,Hup ATDDS督脉百会穴用药后 3~ 6h间有明显的改善学习记忆作用 :13.4 μg/ 0 .2 5cm2 组用药后 4h为佳 ,5~ 6h时作用减弱 ;2 6 .7μg/ 0 .2 5cm2 组自药后 3h起作用明显 ,药后 4h作用最为显著 ,维持至 6h仍有良好作用 ;Hup ATDDS 2 6 .7μg/0 .2 5cm2 经百会、哑门、大椎、至阳和命门五个穴位给药均有明显的改善学习记忆作用 ,其中以百会穴组的作用最为显著 ;Hup ATDDS经百会穴或一般部位 (选臀位 )给药均有改善学习记忆作用 ,但以百会穴给药较臀位用药作用更为显著 ,且Hup ATDDS2 6 .7μg/ 0 .2 5cm2 组对小鼠脑胆碱酯酶活性有明显抑制作用。结论 :Hup ATDDS督脉穴位给药的改善记忆作用优于一般部位给药 ;其改善学习记忆作用可能是由于抑制脑CHE活性 。 展开更多
关键词 石杉碱甲透皮控释制剂(贴片) 督脉 穴位 一般部位 记忆障碍 胆碱酯酶
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