Premelting, Pressure Melting, and Regelation of Ice Revisited

In this article we review some of the most important and relevant literature on the properties of ice. We focus on three of its surface properties, namely, the slipperiness of ice, the phenomena of a string under load passing through a block of ice without cutting the block in half, and pressure melting and adhesion of blocks of ice. We then provide an argument for the most plausible factor responsible for each of these effects.

沙葱的生理特性、功能性成分及开发利用

沙葱(Allium mongolicum Regel)是内蒙古自治区一种重要的野菜资源,其营养丰富、适应能力强,具有极大的生物学研究价值和食品开发前景。就沙葱的生理特性、功能性成分及开发利用进行了综述,并对其开发前景与发展趋势进行了展望。

沙葱提取物抗菌效果的研究(英文)

[Objective] Study on antibacterial activity and stability of the ethanol extracts from Allium mongolicum Regel.[Method] Taking Allium mongolicum Regel.(AMR)as experimental material,the antibacterial and stability test,antibacterial capacity and antibacterial activity substance stability of extracts were studied.[Result] Size order of antibacterial effect of extracts on these 5 strains tended to be:Saccharomyces cerevisiae > Penicillium sp.> Aspergillusniger> Staphylococcusaureus> Escherichia coli;under neutral or slight alkaline conditions,optimum antibacterial effect presented best;and UV light irradiation basically had no influence on tested strains.[Conclusion] Antibacterial effect of ethanol extract shows great difference among these strains,and antibacterial activity substance is of good heat and UV light stability.

七里香蔷薇精油的化学成分分析

采用减压蒸馏法对七里香蔷薇(Rosa banksiae R.Br.var.noroalis Regel.)花瓣进行植物精油提取,并进行初步定性分析。结果表明,七里香蔷薇植物精油中含有21种化合物,其中苄醇、丁子香酚、苯丙醛为主要成分。

高山葱类蔬菜染色体制片方法改进

以山韭菜(Allium japonicurn Regel)和红皮洋葱(A.cepa L.)的根尖为材料,参考常规制片方法,对传统的植物染色体制片方法进行了改进。结果表明,改进后的制片方法不仅提高了植物染色体的制片质量,而且节约了时间和成本。

一种很有利用价值的野生果树——兰靛果忍冬

兰靛果忍冬(Lonicera caerulea L. var. edulis Regel.)为忍冬科,忍冬属的一个变种。是分布广、贮量大、营养丰富、有很大利用价值的野生小浆果类果树,是果品加工的新原料。一、形态特征兰靛果忍冬是落叶灌木,在野生状态下,最高可达5米,一般为0.5～2米。浅根,项根多分布在地表10～20厘米的腐殖质层内。多枝根出,呈丛状。老枝皮灰褐色。

天葱花序轴再生体系研究

以天葱(Allium chrysanthum Regel.)花序轴为外植体,研究不同激素组成及其浓度对天葱花序轴愈伤组织诱导、继代培养和芽分化的影响,以筛选适合天葱花序轴再生的最适培养基。结果表明,以花序轴为外植体的最适愈伤诱导培养基为MS+2.0 mg/L 2,4-D+0.1 mg/L 6-BA;最适愈伤继代培养基为MS+2.0 mg/L NAA+1.0 mg/L 6-BA;最适愈伤芽分化培养基为MS+2.0 mg/L 6-BA+0.1 mg/L NAA。

Simulations of an isotopic fractionation by freezing in an open system

This paper presents a model of isotopic fractionation by freezing under near equilibrium conditions in an open system and uses the model to predict the fractionation curve and slope gradient of δ 18 O versus δD. The simulation results show that 1) the fractionation curve and slope gradient are determined by the ratio of freezing rate to input rate, 2) the isotopic value in the initial stage of freezing is determined by the isotopic value of initial water; 3) in the latter half of freezing in an open system, the isotopic value converges to a certain value determined by that of input water. These results suggest that the shape of the fractionation curve is the method to distinguish whether freezing occurred in a closed or open system. This analysis is applied to an isotopic curve observed in basal ice of Hamna Glacier, Sya drainage, East Antarctica. The isotopic curve indicates formation by regelation in an open system with a ratio of freezing/input rates of about 10/4.

A Morphinane Alkaloid from Meconopsis quintuplinervia

A new morphinane alkaloid named as mecoquitupline was isolated from Meconopsis quintuplinervia Regel. Its structure was elucidated to be 6-methoxy-17-methyl-2,3-[methylene bis(oxy)]-morphinan-5-en-7-one by spectroscopic techniques.

太子参伪品淡竹叶根的鉴别

太子参又名孩儿参,为常用中药,是石竹科植物异叶假繁缕 Pseudostellariaheterophylla(Miq.)Pax ex Pax etHoffm.的块根。据报导,曾有以石竹科植物石生蝇子草 Silene tatarinowii Regel〔白花紫萼女娄菜 Melandrium tatarino-

狭叶红景天治疗高原低血压症38例疗效观察

狭叶红景天[Rhodiola kirilowii(Regel)Maxim]在藏医药书籍中已有记载。该药的毒性试验、药效学研究、Ⅰ期临床试验证明,具有抗缺氧、抗疲劳作用,毒性很小。据此,我们于1988年9～12月在青海省天峻县(海拔3414米)用狭叶红景天治疗了38例高原低血压症患者,取得了较满意的近期疗效。

Bioclimatic Modeling of the Potential Distribution of the Western Tien-Shan Endemic <i>Tulipa kaufmanniana</i>Regel (Uzbekistan, Kazakhstan)

The article analyzes the natural distribution area of the species Tulipa kaufmanniana Regel using the programs of type MaxEnt and ArcGis, the endemic of Central Asia (past, current, future). According to the results of the study, it is proved that the main distribution of the species coincides with the boundaries of the areali Tien-Shan mountain system (Uzbekistan, Kazakhstan). It is noted that the climatic factors that are optimal for the species are sufficient temperature and annual precipitation.

藏药狭叶红景天预防高原对人体心电图影响的效果分析

狭叶红景天[Rhodidla kirilowii(Regel)Maxim]在藏医药书籍中已有记载。该药的药效学研究、毒性试验、Ⅰ期临床试验证明,其有抗缺氧、抗疲劳、毒性很小等作用和特点,能安全用于临床。据此,我们于1988年6月以心电图为指标,分组对由青海省湟中县李家山乡(海拔2,500米)

君子兰开花特性研究

对三明地区盆栽君子兰开花特性进行研究,提出适合本地区君子兰花期控制方法。

A new superoxide-generation inhibitor from rhizome of Anemone raddeana Regel

A new triterpenoid saponins, raddeanoside R19 （1） was isolated from the rhizome of Anemone raddeana Regel. The effects of raddeanoside R119 on superoxide generation in human neutrophil were evaluated. The compound suppressed the superoxide generation induced by N-formyl-methionyl-leucyl-phenylalanine （fMLP）, phorbol 12-myristate 13-acetate （PMA） and arachidonic acid （AA） in a different concentration-dependent manner.

Bioecological Features and Anatomical Structure of <i>Crocus korolkovii</i>Regel &Maw in the Introduction of Uzbekistan

The results of the study Crocus korolkovii Regel & Maw, were introduced into the Tashkent Botanical Garden. Bioecological features, morphological and anatomical characteristics of Crocus korolkovii were studied. Phenology was studied by I.N. Beideman, biology bloom by A.P. Ponomarev, breeding and seed production of plants by T.T. Rakhimova. The study of the biology of flowering determined the optimal humidity, air temperature and soil surface. The anatomic study used fresh tissue samples which were fixed in 70% alcohol. A cross-section of the sheet and the structure of the flower in the introduction of conditions were studied.

The Impact of Ecologic Factors on Growth and Development of Two Polygonatum Species

The research results of environment impact on growth and development of Polygonatum odoratum (Mill.) Druce and Polygonatum severtzowii Regel species are given in the article. The effect of light intensity, temperature and humidity factors was noted in the studied species.

Protective effects of Pulsatilla chinensis Regel against isoproterenol-induced heart failure in mice

Objective:To study the cardioprotective effect of Baitouwen(Pulsatilla chinensis Regel,PR)in isoproterenol(ISO)induced heart failure in mice,and investigated the molecular targets using network pharmacological prediction and experimental validation.Methods:PR were orally administered to ISO induced HF mice for two weeks.The cardiac function was analyzed by echocardiography.Hematoxylin-eosinstaining(HE)was used to evaluate the pathological changes.The PR targets for HF were predicted by bioinformatics analysis tool(BATMAN-TCM).The expression of atrial natriuretic peptide(ANP),brain natriuretic peptide(BNP),and HF related genes Phosphodiesterase(PDEs),were detected by real-time fluorescence quantitative PCR or Immunohistochemical staining in heart tissues.Results:Cardiac hypertrophy was observed after ISO treatment,and hypertrophic cardiomyocytes were arranged in disorder.Moreover,the expression of ANP and BNP gene in myocardium were upregulated(P<0.05).Treatment of HF mice with PR aqueous extract improved cardiac function characterized by enhanced ejection fraction(EF)and fraction shortening(FS).Furthermore,PR extract also downregulated the expression of ANP and BNP in the heart tissues.Arrangement of cardiomyocytes was also improved.Furthermore,administration of PR group decreased target genes PDE5 and PDE1C expression in the hearts.In addition,PR treatment also improved myocardial fiber distribution and decreased myocardial thickness in the hearts of HF mice.Conclusion:PR treatment may suppress cardiac hypertrophy and improve myocardial function in HF mice via inhibiting the predicted targets PDE5 expression.These results suggest the potential of using PR in preventing the development of HF.

乌苏里瓦韦(Lepisorus ussuriensis(Regel et Maack)Ching)孢子诱导再生植株的研究

乌苏里瓦韦是一种民间常用的药用蕨类植物,本研究首次建立一种以乌苏里瓦韦孢子为外植体形成完整植株的体系,得到了乌苏里瓦韦体外扩增的方法。为了探究最佳的孢子萌发条件,设计使用6种NAA和6-BA激素组合探究孢子的最佳萌发条件,然后取孢子萌发得到的乌苏里瓦韦叶片,分别接种到不同浓度的NAA和活性炭的组合培养基中,探究乌苏里瓦韦生根的最佳条件。结果表明,乌苏里瓦韦孢子的最佳萌发条件是:1/2MS培养基为基本培养基,附加NAA 0.2 mg/L,6-BA 0.5 mg/L蔗糖30 g/L,琼脂7 g/L;生根的最佳条件为:1/2MS培养基为基本培养基,附加NAA 0.4 mg/L,蔗糖30 g/L,琼脂7 g/L,活性炭1.5 g/L。本研究首次报道了乌苏里瓦韦的体外繁殖形成完整再生植株的方法,为乌苏里瓦韦的人工繁殖,同时为乌苏里瓦韦的可持续开发利用打下坚实基础。