Results 21 to 30 of about 182,504 (107)
, 1997 介绍了基于细观非线性动力学模型的研究所取得的进展。发现系统显示一种共性特征，称为演化诱致突变，即演化模式从整体稳定向灾变性模式转变，宏观破坏的样本个性行为 ...
白以龙, 柯孚久, 夏蒙棼
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Functional Ecology, Volume 40, Issue 9, Page 2843-2860, September 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Drylands are mainly structured by both vascular plants and biological soil crusts (biocrusts), the latter often regarded as a self‐organizing component of these ecosystems.
Haoran Luo +13 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The electrocatalytic co‐reduction of CO2 and nitrate (NO3− ${\text{NO}}_{3}^{-}$) to synthesize urea presents a sustainable alternative to traditional industrial processes, yet its efficiency is fundamentally limited by the kinetically mismatched activation and coupling of CO2 and NO3− ${\text{NO}}_{3}^{-}$.
Jiayu Liu +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Na‐superionic‐conductor‐type (NASICON) Na4MnV(PO4)3 (NMVP) is an appealing cathode for sodium‐ion batteries (SIBs), but its application is hindered by Jahn–Teller distortions, sluggish Na+ kinetics and poor conductivity, leading to rapid capacity fade.
Huan Liu +8 more
wiley +1 more source
Hypertension at 5 months postpartum in women with gestational diabetes
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 2, Page 202-210, August 2026.ABSTRACT Objective Gestational diabetes mellitus (GDM) is associated with future maternal cardiovascular disease, independent of the development of Type‐2 diabetes mellitus. As a major cardiovascular risk factor, we examined the incidence and predictors of hypertension at 5 months postpartum in women with previous GDM.
C. Gómez Fernández +7 more
wiley +1 more source
, 2011 本发明属于微藻生物技术领域，具体涉及一种异养微藻的高脂突变株定向选育方法。将在Kuhl培养基中培养至对数生长期的具有暗异养生长特性的产脂微藻株系，采用EMS化学诱变处理；将诱变处理后藻体转接培养在高脂定向筛选平板上，筛选出体积增大的单细胞藻体进行扩种继代培养；将上述扩种继代培养至对数生长期的藻体进行诱导培养6-20天，取上述藻体利用气相色谱测定突变株与野生株的脂含量，突变株的脂含量与野生株的脂含量的比值大于110 ...
王艳, 秦松
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簇毛麦(Dasypyrumvillosum)矮秆突变体的鉴定
, 2008 为给簇毛麦杂交后代群体中自然突变产生的矮秆突变体在小麦遗传改良中合理有效的利用提供理论依据,对该矮秆突变体的生物学及遗传学特性进行了初步研究。该突变体在苗期与对照植株无明显差异,在成熟期突变体株高30 cm,约为对照株高的1/3。突变株茎的倒一、二节间(最上部的两个茎节)长度分别为对照植株长度的1/9和1/6。细胞学观察表明,突变体的茎节细胞纵向延长受到抑制。此外,该突变株还表现出部分雄性不育,自然结实率低。花粉活力检测发现,突变株可育花粉只有20%,在外施GA3后花粉育性可得到恢复 ...
刘英华 +5 more
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, 2009 利用玉米ae1和du1隐性纯和突变自交系与普通玉米自交系48-2的杂交F1、F2代子粒为研究材料,通过单粒法测定子粒的直链淀粉含量和重量,用于分析玉米胚乳突变基因ae1和du1的遗传效应。结果表明:F2代中具有ae1或者du1纯和突变的子粒表皮皱缩,重量明显下降,直链淀粉含量显著提高。在ae1与du1的杂交后代中,子粒的单粒重和直链淀粉含量没有显著变化,表明ae1与du1双突变并不能导致直链淀粉含量增加。单突变的ae1和du1群体内各子粒间的直链淀粉含量和重量差异较大 ...
任燕, 吴崇明, 王涛
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, 1999 目的: 寻找中国人肝豆状核变性病(WD)基因突变的形式及频率。方法: 应用 PCR-SSCP 法对 45名 WD 患者进行 基因 exon5、8、14、18筛选, 对确定异常者进行 DNA 序列分析。结果: 在 45 名患者 DNA 样本的 PCR 扩增产物中未发现 exon 18 泳动异常,而 3 名患者显示exon14 多态性泳动异常, 但这种泳动也可见于正常标本中。4例患者显示 exon 5 单链构象多态性, 序列分析表明为 T 插入突变,其突变频率为 8.
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, 1980 <正> 柱孢鱼腥藻(Anabaena cylindrica)和鱼腥藻7120(Anabaena 7120)(均为蓝藻植物)在空气中均能固定分子态氮.我们用紫外线和亚硝基胍分别对它们进行诱变、筛选,获得二株具异形胞而不能在空气中固定分子态氮的突变种.鱼腥藻-1(Anabaena-1)是鱼腥藻7120经紫外线诱变后得到的突变种,而鱼腥藻-2(Anabaena-2)是柱孢鱼腥藻经NTG诱变后获得的突变种.它们的异形胞频率(10～17.5%)高于野生种(5～9 ...
王业勤,何家菀,戴玲芬,黎尚豪
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