几种晚熟桃与大久保桃授粉受精所需时间的研究

本文通过对丹桂、晚红蜜、绿化９号、雪桃４种晚熟品种桃，及对照品种庆丰，给大久保桃授粉受精速度的研究，以及它们之间的杂交亲和力、花粉生活力等研究。试验表明：大久保接受４种晚熟桃及对照品种花粉后，受精时间集中在１４～３８ｈ内，而且，各供试父本品种与大久保杂交的受精时间，大都确定在６ｈ的范围内；在杂交亲和力方面发现：晚熟桃与中熟桃的杂交亲和力较低；各供试父本品种的花粉生活力与其和大久保的杂交亲和力，呈一定程度的正相关趋势。     

1-MCP对桃果实低温贮藏期间挥发性物质的影响 ——主成分分析法

以大久保桃果实(Prunus persica (L.) Batsch cv.Okubao)为试材,采用固相微萃取与气相色谱-质谱联用技术,对8℃贮藏期间对照组与1-MCP处理组的大久保桃果实挥发性物质进行测定,并使用主成分分析法确定大久保桃果实挥发物的指纹图谱及标志性挥发物.结果表明,大久保桃果实挥发性物质共检测到26种,主要包括酯类、芳香烃类、醛类、内酯类、缩醛类物质.8℃贮藏期间,1-MCP处理显著推迟了醛类和内酯类物质的释放高峰的出现,并且显著抑制了内酯类物质的释放量;在贮藏后期显著促进了乙醇的释放.主成分分析结果表明,2,2-二异丙基-1,3-二恶茂烷和1,1′-双(1,1,2,2-四甲基-1,2-亚乙基)苯是贮藏3 d时1-MCP处理组的标志性挥发物,而乙醇、丙酮、氰基乙酸是贮藏16 d和20 d时处理组的标志性挥发物.     

传奇“桃王”屈海全

熟悉屈海全的人，都说他是一位“奇人”。说他奇，不单单因为他侍弄的“绿化9号”大桃2006年拿了北京奥运推荐果品评比一等奖，为平谷区十几万桃农争了光；而是因为他不知使了什么招数，2006年让一株生长了23年的温室“大久保”桃收入了3．3万元。有专家说，这在全世界的果品生产史上都是一个奇迹.     

超声波破碎法提取辅酶Q10研究

利用超声波破碎法提取类球红细菌辅酶Q10,通过单因素实验及正交实验,获得最佳工作条件.实验结果表明:超声波器输出功率为195W,每次工作时间/间歇时间为4s/5s,工作总时间为4.5min,处理菌悬液OD600为0.640为最佳工作条件.采用优化后的超声波提取工艺,辅酶Q10提取量可达到1.524 mg/g.     

超声波+赤霉素对柴胡种子活力的促进作用

采用饱和D最优设计方法,研究了超声波＋赤霉素对柴胡种子活力的促进作用。结果表明：当超声波处理时间为12-33 min,赤霉素浓度19×10^-6-46×10^-6mL/L时,可明显促进种子的活力。     

酸铝对大麦不同耐性品种形态,生长及元素吸收的影响

通过对耐酸铝性不同的两个大麦品种进行耐酸铝性鉴定表明，两品种的苗高、根长及干重受到的影响均存在显著差异。经酸铝培养液处理后，敏感品种“嵊县无芒六棱”体内铝元素含量显著增加，而营养元素的含量却明显降低。     

脉冲超声波对黄粉虫幼虫水溶性蛋白结构的影响

采用功率1 000 W的脉冲超声波处理黄粉虫幼虫水溶性蛋白,并对蛋白的结构变化进行研究.结果表明:在脉冲超声波处理时间25 min内,蛋白的紫外吸收随着处理时间的延长而增强;蛋白的表面疏水性在处理10 min时达到最大,随后逐渐降低;游离巯基的含量在脉冲超声波处理5min时稍有降低,随后逐渐增加;蛋白粒径随着处理时间的延长而减小,当处理时间达到20 min时,粒径显著增大;蛋白二级结构中α-螺旋的含量降低,β-链及无规则卷曲的含量升高;脉冲超声波处理后蛋白的变性聚丙烯酰胺凝胶电泳图谱未发生改变,表明蛋白的一级结构未受到影响.     

超声波和赤霉素对两种藏茵陈种子萌发能力的促进作用

为促进藏茵陈种子萌发,采用超声波、赤霉素、超声波和赤霉素相结合处理种子,研究3种处理对两种藏茵陈种子萌发能力的影响。结果表明:赤霉素浓度在1 000～2 000 mg/kg时,对种子萌发具有一定的促进作用,其中以浓度1 500 mg/kg处理效果较好;超声波处理20～40min,对种子的萌发均有一定的促进作用,其中以超声波35 min效果较好,种子发芽提前1～2d;超声波和赤霉素共同处理对种子发芽具有协同效应,其中以超声35 min、赤霉素浓度1 200 mg/kg效果较为明显。超声波、赤霉素、超声波和赤霉素相结合处理能够明显促进藏茵陈种子萌发。     

低强度间歇超声处理对水稻秸秆厌氧发酵的影响

为了探索超声处理对水稻秸秆厌氧发酵的影响机理,通过研究超声处理强度和单次超声处理时间对厌氧微生物生长发育、可溶物溶出度的影响规律,初步确定了超声波声强、单次超声处理时间的有效范围。利用正交试验分析了超声处理强度、作用时间和时间间隔对秸秆厌氧发酵产气量及沼气中CH_4含量的影响规律。结果表明:在1.2 W/cm~2的声强以下,增加超声波声强可促进厌氧微生物的生长发育;0.8 W/cm~2声强处理15 min以内对提高生物量的效果较好,但长时间的超声处理会抑制细菌的生长;0.8 W/cm~2、30 min的超声处理,秸秆的溶出率可提高13.5%;超声处理强度1.0 W/cm~2、单次超声处理时间15 min、超声处理时间间隔50 min的超声处理使产气高峰提前4～5 d,同时总产气量可提高24.48%,CH_4产量提高25.92%。超声处理可促进厌氧菌的生长、加速秸秆养分的溶出以及改善发酵液的传质作用,从而提高产气效率。研究结果能为超声波在沼气厌氧发酵中的应用提供参考。     

超声波对番茄青枯雷尔氏菌致病性变化的影响

用频率为40kHz,功率为250W的超声波处理野生型番茄强致病力青枯雷尔氏菌F.1.3 010703 01,结果表明:在5、10和20min的处理出现3.24%～5.54%的抑制率,而在15和25min的处理出现-1.04%～-2.82%的抑制率;强致病力菌株的弱化指数在0.4461～0.5376之间,强致病力菌株所占的比例在95.83%～96.14%之间;超声波处理不同时间的菌株回接番茄组培苗,回接发病率皆为100%;处理组与对照之间无极显著性差异(P≥0.01).表明处理菌株保持着强致病力菌株的特性.作为一种机械能量形式,超声波对番茄青枯雷尔氏菌F.1.3 010703 01的生长和致病力都没有影响.作为一种物理致弱因子,超声波对青枯雷尔氏菌无致弱作用.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.