Results 41 to 50 of about 12,994 (161)
在塔克拉玛干沙漠腹地特殊的生态条件下,通过植物固沙试验,对植物固沙中重要环节的植物种选择、配置、造林密度和造林季节以及合理灌溉问题进行了研究,并对不同灌溉条件下沙地盐分积累状况,以及对植物生长发育的影响进行了比较深入的研究。指出用矿化度>7.41g/L的咸水灌溉,对耐盐性较弱的固沙灌木的生长发育有限制作用 ...
赵存玉 陈广庭 王涛
doaj +2 more sources
Molecular mechanisms of cell death induced by matrine in human cholangiocarcinoma Cells [PDF]
胆管癌是起源于胆管上皮的一种恶性肿瘤,在我国发病率和死亡率逐年上升。而胆管癌细胞抵抗凋亡是导致胆管癌化疗失败的重要原因,所以研发能够诱导胆管癌细胞以不发生凋亡的死亡新途径的化疗药显得十分重要。苦参碱具有多途径、多种机制的抗肿瘤活性,已经证实能够诱导多种肿瘤细胞死亡,但是在胆管癌中的生物学作用和潜在机制却鲜有报道。程序性坏死(necroptosis)是可被调控的程序性细胞死亡,在形态学上具有典型的坏死样形态改变,依赖于受体相互作用蛋白1和3,此外,可被程序性坏死的特异性抑制剂Nec-1所阻断 ...
徐贝贝
core
This study investigates the diversity, conservation status, distribution, and discovery rate of 84 Cyrtodactylus species in Indochina. Despite rising discovery rates, many species are unassessed, with over half unprotected and 90.5% endemic. This study suggests expanding protected areas and implementing an integrated approach to conservation with IUCN ...
Matilda Julia Lasota +6 more
wiley +1 more source
有关毛丝鼠能否在我国正常发育和健康成长方面的研究材料,报导甚少。我们从1981年元月起对参加繁殖的母鼠、公鼠、及本场自己繁殖的仔鼠进行了全面的生长发育测定,借以研究毛丝鼠各个时期生长发育规律,以便为正确饲养和管理提供科学依据。选用本场1981年自繁的100头仔鼠作为对幼鼠个体发育的研究材料。在40日龄之内,每隔5天测量一次,测量的项目有:体重、休长、尾长、耳长、后足长 ...
阚兴国, 梁杰荣, 何祥俊
doaj
[目的]研究十字花科与豆科作物对微囊藻毒素(MC)耐受性的差异。[方法]以十字花科作物典型作物油菜、小白菜、甘蓝与豆科典型作物黄豆、豌豆、蚕豆为材料,检测它们在不同浓度MC暴露条件下的生长发育情况,检测指标包括发芽率、株高、叶绿素等。[结果]十字花科作物中油菜与小白菜受MC影响较大,甘蓝受影响较小,而豆科作物普遍受影不大。[结论]豆科作物比十字花科作物对MC耐受性更强 ...
刘剑彤, 刘碧波, 吴烨
core
Staghorn ferns are among the most highly valued ornamental plants but several species experience major extinction threats. Here we establish a DNA barcoding reference dataset to support reliable identification of cultivated staghorn ferns to secure species identity of individuals at all life stages that are used in ex situ and in situ conservation of ...
Kaikai Wang +6 more
wiley +1 more source
Study on Alleviation Mechanism of Hydrogen Sulfide on Copper Stress in Rice Seedlings [PDF]
硫化氢(hydrogensulfide,H2S)是继一氧化氮(nitricoxide,NO)、一氧化碳和(carbonmonooxide,CO)之后被广泛关注的气体信号分子,低浓度的H2S在动物、植物和微生物中被证实参与了众多生理生化过程,调节了有机体的生长发育。H2S在植物应对盐害、干旱、重金属胁迫、冷热胁迫中发挥重要作用,增强植物对逆境的抵抗力。 铜污染是环境污染中不容忽视的一类重金属污染。本文中,我们以水稻(Oryzasativa)为材料,研究了H2S对铜胁迫的影响。结果显示低浓度的H2S ...
尹珊珊
core
Trends of Nature Education Research in China: A Scholarly Review 中国自然教育研究趋势:学术综述
This study reviews 87 articles on nature education in China (2014–2024), identifying three research types: philosophical, empirical, and practical. Findings show limited use of Chinese philosophies and a need for innovative interventions. Future research should strengthen local grounding and link research with practice.
Yue Li, Yun‐Wen Chan, Yu‐Chi Tseng
wiley +1 more source
一、雏鸟的生长发育灰头鹀雏鸟的生长发育、与一般雀形目鸟类很相类似。刚出壳时全身仅前额、眼泡之问,头顶、枕部、两翅、肩部、背中线和股沟处有成丛生长的灰色绒羽、其余均裸出无羽。皮肤嫩黄色。嘴角膜白色 ...
赵正阶
doaj
A content analysis of 154 nature education lesson plans from China showed that educators designed diverse programs tailored to age‐specific developmental and social needs. Most focused on personal growth, such as cognitive development, mental well‐being, and family bonding, but few explicitly addressed environmental conservation goals.
Yue Li, Danning Lu, Xin Yu, Chuan Liao
wiley +1 more source

