高盒形藻的有性生殖发生

从厦门沿岸分离高盒形藻，培养观察其有性生殖发生．该藻在光诱导下每天发生一次性分化，每次持续４ｈ．从海区采样观察和实验室培养，性分化在６２μｍ以下宽度的细胞中发生．每个精原孢囊产生１２８个单鞭毛精子，精子生活１９ｈ之后存活率大大下降，每个卵囊形成成对的卵子，精子和卵子几乎同步发生．结果表明，该藻可能存在小型和中型细胞分段发生性化和两次细胞复大现象．生殖中呈现的相似和相异特征，显示种间的亲缘关系．     

中华盒形藻有性生殖的研究

中华盒形藻有性生殖中,雌雄性的分化分别在39—78μm宽度的细胞中产生.雌雄配子形成在早晨5-6时开始,14-20时进行减数分裂,22时形成精子,卵子同时成熟.受精多数在午夜之前进行.合子经过复大孢子萌发阶段发育成为新子代复大细胞,细胞宽度增大3.8—5.5倍.在温度20—24℃和光强度4500—5000lx条件下,雄配子发生全程一般需要15h,而合子萌发成为新子代复大细胞通常要经历12h以上时间.     

中华半管藻繁殖生物学研究：Ⅳ.有性生殖与生殖调控

中华半管藻有性生殖是一个卵配过程，在培养种群细胞宽４￣５０μｍ时，性细胞在４￣３０μｍ宽的细胞中产生。精子发生过程较为罕见，精原孢囊形成合胞体，每个孢囊产生３２或６４个精子，复大后藻细胞最大宽度可增至１２．５倍。整个生殖过程需经历一周左右，在弱光．短日照与正常盐度获得最高性分化率。     

流式细胞技术对莱哈衣藻(Chlamydomonas reinhardi)配子形成过程的观察

应用流式细胞仪观察了不同暗交替周期对莱哈衣藻的配子形成过程影响,并采用核酸抑制剂和蛋白合成抑制剂处理,观察其配子配对情况。结果表明在缺氮诱导条件下,前期的光照对配子分化形成十分重要,而先黑暗后光照或连续黑暗诱导时,细胞或配子的分裂缺乏规律性。     

合浦珠母贝精子发生过程的超微结构观察

报道了透射电镜下合浦珠母贝精子发生过程超微结构的观察结果。描述了精子发生过程中线粒体，中心体（鞭毛），顶体泡和细胞核的演变过程。精子细胞核内染色质以颗粒状形式凝集，精子核呈圆桶状，圆形的顶体泡迁移到顶体部位后变形成为圆锥形顶体。合浦珠母贝精子经过精度原细胞，精母细胞和精子细胞，最终发育成为成为成熟的精子，成熟的精子由头部（长约２μｍ），中段（长约０．６８μｍ，宽约１．６μｍ）和尾部（长约５０－６０     

高粱（Sorghum vulgare Pers.）根尖切除后再生的研究

将高粱幼苗初生根根尖分别在根冠与分生区原始细胞接触处为起点，距２５０，５００，１５００μｍ处切除。比较了不同品种根尖再生形态，并研究了要尖再生过程中切口端细胞组织的分化。结果是：（１）２５０，５００μｍ处切除后再生出新根尖，１５００μｍ处切除后不再生新根尖；（２）再生根尖有单轴，二叉，三叉，四叉类型不同品种间再生率没有明显差异；（３）中柱鞘细胞的分裂对根尖的再生有重要作用，从起源看，再生根属侧根范     

蕨游动精细胞的研究

电镜研究表明蕨精细胞在发育早期为多角形细胞，具有细胞壁，多层结构和微管，但不具鞭毛，核圆形或椭圆形，随着精细胞的发育，质膜退缩远离细胞壁，在细胞壁和质膜之间质下一个空间，细胞核螺旋化并有大量鞭毛形成，最后精细胞发育形成具有鞭毛的游动精子。     

琼氏圆筛藻细胞分裂的光温效应

在不同的光温条件下，研究琼氏圆筛藻细胞分裂的昼夜变化。实验表明，该藻培养种群每昼夜形成三次分裂相，其细胞分裂呈现在光期快在暗期慢的特点，而分裂相的大小和定时则随光温条件的变化而变化。在温度27℃，光强度8000Lx和光暗周期16：8h的条件下，该藻呈最大日增殖率（μ值为3．02次／d），显示琼氏圆筛藻为暖水性的生态特征。     

亚快速凝固结晶取向对结晶形态选择的影响

采用区域熔化定向凝固装置，对冷却速度在１３～１３０Ｋ／ｓ范围内Ｎｉ－５％Ｃｕ合金的结晶形貌研究表明：在温度梯度１３００Ｋ／ｃｍ条件下，晶体生长速度ｖ＝５００μｍ／ｓ时，不同结晶取向晶粒的结晶形貌不同；当晶体生长速度ｖ＝８００μｍ／ｓ时，不同结晶取向晶粒的细胞晶间距不同，亚快速凝固条件下，晶体生长方向对结晶形貌的影响非常显著．     

胶体氯化银抗菌膜的制备及其光催化抗菌特性

在AgNO3溶液中添加NaCl溶液，形成胶体悬浮液，利用化学沉积法制备胶体氯化银膜。在胶体氯化银膜表面分别添加大肠杆菌(E．coli)和青霉菌(penicillium)孢子悬浮液，在近紫外条件下，研究胶体氯化银膜的抗菌性能和光催化特性。结果表明，胶体氯化银膜在近紫外条件下，能够产生大量的羟基自由基，对大肠杆菌和青霉菌显示了强大的杀菌特性。经聚氯乙烯(PVC)固定的胶体氯化银膜，在低光强度下经连续30个批次的光照杀菌，对大肠杆菌和青霉菌杀菌效果几乎没有变化，证明胶体氯化银膜在近紫外条件下的杀菌稳定性和实用性。     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.