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Search Results: 1 - 10 of 91311 matches for " 楚现周 "
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离核晚熟桃新品种‘双红艳’
爱香,杨英军,,张要战,李艳梅,郝水旺
园艺学报 , 2010,
Abstract: ‘双红艳’桃是2000年用‘河洛红蜜’作母本,‘玉西红蜜’、‘艳光’和‘地方桃’的混合花粉作父本杂交育成的晚熟离核新品种。果实圆球形,平均单果质量350g,阳面呈玫瑰红色,肉质细密,味甜。离核,硬度大,耐贮运,抗逆性强。果实于9月中下旬成熟,恰逢中秋节和国庆节,市场前景良好。
日本政策评价法的特征及启示
Characteristics and Enlightenment of Japanese Policy Evaluation Method
 [PDF]

,
Open Journal of Legal Science (OJLS) , 2015, DOI: 10.12677/OJLS.2015.31002
Abstract:
从美国、日本等发达国家政策评价制度的经验来看,为了避免政策评价制度的确立只是一句空话或是空中楼阁,必须要有一系列法律规范体系作为政策评价制度的保障和支撑。本文主要以日本为主,介绍其政策评价法的发展历程,分析其特征及启示,探讨我国政策评价制度存在的问题,提出构建我国政策评价法的具体建议。
From the experience of developed countries, such as Japan and American, there must be a series of legal system as safeguard and support for policy evaluation system, in order to avoid that the policy establishment of evaluation system is just empty talk or castles in the air. This paper introduces the development history of the policy evaluation method, mainly in Japan, analyzes its characteristics and enlightenment on China’s policy, discusses problems of existing evaluation system in our country, and puts forward specific suggestions for establishing policy evaluation method.
PGRP作为小细胞肺癌肿瘤标志物的临床价值与检测方法
The Clinical Application and Detection Methods of Small Cell Lung Cancer Tumor Marker: Pro-Gastrin Releasing Peptide
 [PDF]

振宇, 小林
World Journal of Cancer Research (WJCR) , 2014, DOI: 10.12677/WJCR.2014.42003
Abstract:

前胃泌素释放肽(pro-gastrin releasing peptide, PGRP)是一种新型小细胞肺癌(SCLC)肿瘤标志物。大量研究证明其在诊断与鉴别诊断SCLC方面较其他肿瘤标志物有更良好的表现,在早期筛查、治疗监测、预后评价、复发预测等方面也有一定价值,与其他标志物联合检测可以进一步提高诊断准确性。本文对PGRP作为SCLC肿瘤标志物的临床应用价值及检测方法做一综述,探讨进一步研究方向,以期对临床诊断和治疗提供技术支持。
Progastrin releasing peptide (PGRP) is a new type of small cell lung cancer (SCLC) tumor markers. Numerous studies have demonstrated its better performance compared with other tumor markers in the diagnosis of SCLC, and considerable value in early screening, treatment evaluating, prognosis prediction and progression monitoring. Moreover, combined use of PGRP with other tumor markers may possess higher diagnostic accuracy than any alone does. Here we review the new progresses in the clinical application of PGRP as the SCLC tumor marker, and discuss the future directions.

从社会经济角度分析气刺微割的可行性
魏小弟,
热带农业科学 , 2010,
Abstract: 气刺微割技术是近十几年来兴起的一种全新采胶技术。从社会经济发展、气刺微割在提高采胶劳动生产率上的优势、气刺微割需增加的费用三个方面,分析气刺微割技术在经济上的可行性。
平顶山矿区丘陵坡地土壤重金属分布及污染特征
纯洁,金风
地理研究 , 2014, DOI: 10.11821/dlyj201407017
Abstract: 对平顶山矿区周边丘陵坡地土壤进行采样,分析了Cu、Zn、Cr、Ni、Pb在不同海拔与矿区下风向不同距离处的分布特征及污染水平。结果表明①矿区丘陵坡地土壤存在不同程度的重金属累积,以Ni、Cr、Cu累积较重。②五种元素均在矿区、坡底附近及近坡顶含量较高,而在矿区下风向以50m内含量最高,之后呈递减趋势。③Cu、Cr、Pb随坡度减小而含量增大,Zn、Ni在坡度5°~15°时含量最大;土地利用对坡面土壤重金属的分布不产生明显影响,林地、草地、坡耕地之间重金属含量也无显著差别。④五种元素均在矿区附近产生污染,矿区以下存在Cu、Ni、Pb污染,而矿区以上只有Ni出现轻度污染;矿区下风向Cu、Ni污染且迁移距离较远,Cr、Pb仅在100m内出现轻度污染,Zn尚未达到污染水平。⑤Ni、Cu、Pb以人为活动源为主,Cr和Zn以自然源为主。
以疏水性Fe3O4纳米粒子为基的脂质体的制备及表
Preparation and Characterization of Liposomes Embedded with Hydrophobic Fe3O4 Nano-Particles
 [PDF]

韩利敏, 潘立志, 险峰, 兴平
Journal of Advances in Physical Chemistry (JAPC) , 2016, DOI: 10.12677/JAPC.2016.51001
Abstract:
磁性脂质体既有脂质体良好生物相容性的优势又具有磁性质而被广泛地用于肿瘤组织的MR增强造影,以实现对肿瘤的预防和早期诊断。本文运用经典的薄膜分散法制备出了一种结构较为新颖的磁性脂质体即负载疏水性Fe3O4纳米粒子的脂质体。研究了脂浓度、卵磷脂和胆固醇质量比等因素对磁性脂质体的性能影响,并通过TEM、DLS等手段进行形貌和粒径表征。另外,我们采用邻菲罗啉分光光度法测定Fe含量,以包封率为指标,对影响制备HMLs的因素进行正交实验。结果表明:当脂质体的浓度维持在0.5~2.0 mg/mL,卵磷脂和胆固醇的质量比在2:1~6:1之间时,所得脂质体复合体的稳定性良好,形貌及大小分布均匀,主要呈现夹心式形貌,粒径为125.3 ± 12.9 nm;当初始铁浓度为0.5~3.0 mg/mL时,HMLs的包封率为90%~71.0%。并且HMLs拥有很高的铁含量,这表明其作可潜在的用作肿瘤磁共振成像(MRI)造影剂以增强肿瘤造影的效果。
Magnetic liposomes not only have good biocompatibility but also have excellent magnetic proper-ties, so it is widely used in tumor tissue to enhance MR angiography in order to achieve prevention and early diagnosis of tumors. Here, we describe synthesis of magnetic nano-composite liposomes (HMLs) by a thin film dispersing method, based on hydrophobic magnetite (Fe3O4) nanoparticles. We studied the effect of lipid concentration, lecithin and cholesterol mass ratio for the properties of HMLs. The results showed that the size of the HMLs containing Fe3O4-OA NPs mainly in a sand-wich-structure is 125.3 ± 12.9 nm obtained by transmission electron microscopy (TEM) and dy-namic light scattering (DLS). The optimized prescription of HMLs has been obtained by orthogonal tests in which encapsulation efficiency of Fe is used as index and phenanthroline absorption spec-trophotometry is used to determine Fe content. The results showed that the best prescription pre- paration process of HMLs is: 0.5 - 2.0 mg/mL of lecithin, and [lecithin]:[cholesterol] = 2:1 - 6:1 (w/w). And while the initial Fe concentration in the solution varied from 0.25 to 3.0 mg/mL, an effective Fe3O4 NPs loading was achieved, with encapsulation efficiency (EE%) from 91.0% to 71.0%. In a word, the results affirm the HMLs possess high Fe concent and can be potentially used to enhance Magnetic Resonance Imaging (MRI) in tumor tissues.
生态文明语境下环境资源法学研究的创新与发展
,道文
法学家 , 2008,
Abstract:
au(111)表面磺酸甜菜碱自组装单层膜的分子模拟
,
南京工业大学学报(自然科学版) , 2010,
Abstract: 旨在探索磺酸甜菜碱型材料阻抗蛋白质吸附的微观机理,以更好地指导新型无生物污染材料的设计和开发.采用分子力学和分子动力学方法,对磺酸甜菜碱在au(111)表面的分子自组装结构和性能进行研究.研究结果表明,磺酸甜菜碱在au(111)表面可形成7?×7?的稳定结构,真空模拟中分子平均倾斜角为23°,水溶剂化模拟中则为25°,两性离子端基偶极方向趋于平行;水和磺酸甜菜碱的两性离子基团相互作用而吸附于表面上,形成一层牢固的水膜,从而有效地阻止蛋白质吸附到材料表面上.
新生大鼠神经干细胞的体外培养与冷冻复苏
Cryopreservation and Culture of Neural Stem Cells Isolated from Postnatal Rat
 [PDF]

张静,, , 张平, 穆淑梅, 张晗
Hans Journal of Biomedicine (HJBM) , 2011, DOI: 10.12677/hjbm.2011.12005
Abstract:
目的:分离培养新生SD大鼠神经干细胞(NSCs),观察应用不同浓度的二甲基亚砜(DMSO)作为冷冻保护剂冷冻保存不同时间的神经干细胞复苏后,其活力及生物学特性的鉴定。方法:在含细胞因子表皮生长因子及碱性成纤维细胞生长因子的无血清培养液中培养新生大鼠海马神经干细胞。经传代扩增后,培养于含有0、5%、10%、15%、20%不同浓度的二甲基亚砜和胎牛血清的神经干细胞冻存液中,在–80℃冰箱中分别冻存1周、2周及一个月后,复苏培养并鉴定,然后对其复苏率进行检测。结果:新生大鼠海马神经干细胞经冷冻复苏后,大多数细胞生长良好并形成新的克隆球。台盼蓝染色检测冻存1周、2周及一个月后的复苏率,含有10%二甲基亚砜的复苏率最高且具有显著性差异(P < 0.05),不同冻存时间的复苏率分别为54.00 ± 1.73,59.00 ± 1.16,58.00 ± 2.08。结论:神经干细胞能在体外适宜的条件下进行培养及冻存、复苏,并且复苏后不影响其原有的生物学特性。
Objective: to isolate and culture neural stem cells from postnatal rat and to observe the viability and biological property of these cells after cryopreservation. Methods: the neural stem cells isolated from hippocampus of the postnatal rat were cultured in culture solution without blood serum. After amplification, the cells were cultured in different concentration of freeze-stored liquid which contained 0、5%、10%、15%、20%DMSO and fetal calf serum, then stored in refrigerator of 80 centigrade below zero one week, two weeks and one month respectively. Through resuscitation training and testing, then we detected the recovery rate of the NSCs. Results: after cryopreservation and culture of neural stem cells isolated from postnatal rat, most of them were growth well and formed into the new cell clones, then the recovery rate of the cells were de-tected with Trypan Blue. There was significant difference in 10% DMSO and it has the highest recovery rate,which is 54.00 ± 1.73, 59.00 ± 1.16, 58.00 ± 2.08. Conclusion: the neural stem cells derived from postnatal rat were able to culture, cryopreservation and resuscitation, which did not change their biological properties.
基于图像分割的云量估计
Cloud Cover Estimation Based on Image Segmentation
 [PDF]

战勇强, 立佳, 徐冠雷,
Journal of Image and Signal Processing (JISP) , 2014, DOI: 10.12677/JISP.2014.33010
Abstract:
云是天空中人类可以直接通过肉眼感知到的主要气象要素之一,云的探测能够帮助人们识别阴晴风雨,预知天气变化。云量估计是云探测组成部分。本文主要采用数字图像处理技术中阈值分割方法估计云量,相比传统人工目测方法和一般器测方法具有便利性和实用性。本文利用地基的可见光范围的云图,在饱和度空间运用分割算法估计云量。对比分析了最大类间方差法、最大熵法、基于数学期望分割法的分割效果,并提出了改进算法。该方法在云底高度较高的云类获得的分割效果更符合云量估计标准。
Cloud is one of the important meterological elements that could be perceived by eyes. Cloud ob-servation could help us make weather forecast. Cloud cover estimation is part of cloud observation. The paper uses the method of threshold segmentation of digital image processing to estimate cloud amount. Compared with traditional artificial and ordinary instrument method, the measurement is more convenient and practical. The paper analyzes the result of three methods of image segmentation which are Otsu, max entropic thresholding and Mathematics expectation, and puts forward a modified method. The modified method works better on cloud image which shows higher cloud.
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