油菜雌性不育突变体FS-M1花器官形态及其受精能力

对甘蓝型油菜(Brassica napus L.)雌性不育突变体FS-M1及其野生型宁油10号的花器官形态和柱头受精能力进行了观察比较研究,结果表明FS-M1雌蕊明显短于雄蕊,6个雄蕊几乎等长,无密腺,但在雄蕊基部有两个月牙形状物;子房扁平,明显短于野生型,且柱头顶端呈叉型;柱头乳突细胞较大但数量较少,粘附花粉能力弱,在开花2～3 d后逐渐干瘪.授粉后,在FS-M1柱头表面观察到萌发的花粉粒,但未观察到花粉粒芽管刺破乳突细胞,形成"膨突"现象,花柱中没有观察到花粉管.切除柱头及部分花柱后再授粉,在FS-M1花柱中观察到伸长的花粉管,授精结角也接近正常.FS-M1雌性不育现象可能与柱头乳突细胞发育畸变和功能缺失有关.     

Effects of different lighting on reproductive system in depressive female rats

AIM: To investigate the effects of different lighting on the reproductive system in depressive female rats. METHODS: Healthy adult female rats were randomly chosen as control group, and the depressive adult female rats in SPF grade were randomly divided into 5 groups(7 rats each):depressive model group, sulfur lamp group, heat radiation lamp group, fluorescent lamp group and LED lamp group. After 45 d of continuous illumination, the estrous cycle was observed by the vaginal exfoliated cells, and the organ indexes of ovary and uterus were calculated. The concentrations of estiadrol(E₂), prolactin(PRL), progesterone(PROG) and testosterone(T) in the serum were detected by ELISA, and the histopathological lesion of ovary was observed under microscope with HE staining. RESULTS: The estrous cycle exhibited serious disorder, the ovaries exhibited serious congestion, and the organ indexes of ovary and uterus and the concentrations of E₂, PRL, PROG and T decreased significantly in the rats in depressive model group compared with control group(P<0.05). The estrous cycle and histopathological damage of ovary were obviously improved, and the concentrations of E₂, PRL, PROG and T were significantly increased after the sulfur lamp lighting in the depressive female rats compared with depressive model group. No obvious change and improvement of the reproductive functions in the heat radiation lamp group, fluorescent lamp group and LED lamp group was observed. CONCLUSION: The reproductive functions of depressive female rats are improved by sulfur lamp lighting.     

浅析几部国产电影中女性角色

2000年后,中国的电影市场逐渐繁荣。在众多的中国电影中,女性角色呈现出两种截然不同的样式：一种是呈现女性的优秀品质,另一种则是女性主义一直所反对的,将女性塑造成社会畸变的产物以吸引男性的眼光。本文通过对《非诚勿扰》、《女人不坏》、《白银帝国》、《十分完美》、《花木兰》等五部电影里的女性角色进行分析,从女性主义电影的角度将中国电影对女性角色的两极分化呈现做一个说明。     

从嘉莉妹妹的三次选择看女性意识的觉醒

嘉莉妹妹是一个从农村出来、未谙世事的小姑娘,她到大都市芝加哥追求美好生活.她的人生先后经历了三次选择,从三次选择的内在联系可以看出嘉莉妹妹的女性意识逐步增强,人生从依附走向独立.     

不同公母配比对提高豪猪繁殖性能的影响

为探讨不同公母配比对提高豪猪产仔数、存活数等繁殖性能的影响。选取2岁左右、胎次及产仔数相近的成年豪猪92只(32公60母),随机分为5组,每组4个重复,分别按1公1母、1公2母、1公3母、2公5母、3公4母搭配分成5种试验方案,各组采用相同的日粮进行饲喂,经过1年的试验,期间记录各组豪猪的流产母豪猪数、产仔母豪猪数、产仔数、食仔数、成活仔豪猪数。结果表明:5种不同的公母搭配中,公母配比为1公2母的产仔率和仔豪猪的成活率分别达到了87.50%、94.12%,平均产仔数为2.13只,繁殖性能和经济效益最理想。     

Albendazole sulphoxide enantiomers in pregnant rats' embryo concentrations and developmental toxicity

Three single oral doses (8.5, 10, and 14 mg/kg) of a racemic formulation of albendazole sulphoxide (ABZSO) were administered to pregnant rats on day 10 of gestation. Mother plasma and embryo concentrations of ABZSO enantiomers and albendazole sulphone (ABZSO(2)) were determined 9 h after administration. The (-)-ABZSO enantiomer showed higher peak concentrations in both maternal plasma and embryo than the (+) enantiomer. An increase in embryo concentrations of ABZSO enantiomers and ABZSO(2) was only observed when dose rose to 14 mg/kg. There was an increase in resorption when the dose increased, but significant differences were only found in the higher dose group when compared with the other groups. The incidence of external and skeletal malformations (mostly of the tail, vertebrae and ribs) rose significantly in the 10 mg/kg group, producing almost 20% and 90% of malformed fetuses, respectively, and gross external and skeletal abnormalities in the thoracic region and limbs were also found.     

中华鼢鼠生物学特性的研究

通过研究中华鼢鼠生物学特性，其食性食量125g／d，每个洞内食物存放平均750g；解剖观察，怀孕胚胎2-4个，平均3．38个，雌雄比为53．16：46．84。     

试析体育流行和参与体育的关系——一个经验研究的视野

当今社会，流行（时尚）这一社会现象普遍存在于人们社会生活的各个领域，追求流行（时尚）已成为现代人特别是中产阶层女性的一个重要特征。以广州市企业女性白领阶层为研究对象，以文献、问卷、主成分分析和结构方程路径模型分析为主要研究方法，从流行和体育流行的概念入手，通过经验研究描述分析了被调查者接受体育流行的一般概况、接受体育流行的类型和途径、接受体育流行和参与体育的关系、影响被调查者参与体育的因素等，最后提出了本文的研究结论与思考。     

女大学生就业难现状及其影响

随着高校的扩招,毕业生大军逐年增加,在毕业生总体就业形势不容乐观的情况下,女大学生就业难问题被提上日程。因女大学生就业难而产生的一系列影响问题更加不容忽视。本文结合一次问卷调查,对女大学生就业难现状及其产生的影响做一些探讨。     

雌性鸭胚胎和雏鸭的抑制素和促性腺激素的分泌

测定了从孵化 ２１ ｄ 到出壳后 １ 日龄雌性鸭胚胎和初生雏 鸭外周及卵巢中具免疫活性的抑制素含量，同时也测定了促卵泡生成素（ Ｆ Ｓ Ｈ）和促黄体生成素（ Ｌ Ｈ）的含量⒚在判定有效后，用牛的抑制素放射免疫系统测定抑制素的含量⒚在第 ２１ 日至 ２５ 日时胚胎血浆中抑制素含量处于低水平， 到第 ２６ 日达到最大值，第 ２７ 日稍降后，抑制素含量在出生后快速下降⒚ Ｆ Ｓ Ｈ 含量在胚胎期无显著变化，其含量的变化与外周抑制素含量的变化相对独立⒚卵巢中抑制素含量在孵 化的第 ２５ 日有显著下降，并于第 ２６ 日时快速回升⒚卵巢和血浆中 抑制素的含量在整个研究阶段后者比前者高约 １０ 倍 ⒚血浆 Ｌ Ｈ 从第 ２１ 日开始下降，至第 ２５ 日 接着有所回升并于第 ２７ 日达第二峰值⒚总之，血浆抑制素和 Ｆ Ｓ Ｈ 在雌性鸭胚胎中不存在负反馈关系， 这预示着胚胎期抑 制素的主要作用 不是抑制垂体分 泌 Ｆ Ｓ Ｈ，同 样 Ｆ Ｓ Ｈ 也不影响抑 制素的分泌⒚