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Search Results: 1 - 10 of 127152 matches for " Jianzhang Li "
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Influence of uron resins on the performance of UF resins as adhesives for plywood
Gao,Wei; Li,Jianzhang;
Maderas. Ciencia y tecnología , 2012, DOI: 10.4067/S0718-221X2012000100001
Abstract: uron resin, a kind of urea-formaldehyde (uf) resin containing much more uron structure, were prepared. several modified uf resins were obtained from mixing uron resins with normal uf resins as well as synthesizing uf resin with uron resin as raw material. this work demonstrated that the introducing of the uron structure reduced free formaldehyde content of uf resin and formaldehyde emission levels in bonded plywood panels significantly, the former were reduced by 76% and 84% in the latter. the synthesis time of uron resin can be shortened to 8 hours. the test result of free formaldehyde content, formaldehyde emission levels and bond strength indicated that specimen of 20 parts uron resin synthesized in 8 hours mixed with 100 parts uf resins (f/u molar ratio of 1.3) had a potential advantage to industrial application. the beneficial effect of uron resin on the performance of uf resin can be attributed to the opening of uron cycle structure and the following reaction with free formaldehyde and its oligomeric glycol forms.
Influence of uron resins on the performance of UF resins as adhesives for plywood
Wei Gao,Jianzhang Li
MADERAS : Ciencia y Tecnología , 2012,
Abstract: Uron resin, a kind of urea-formaldehyde (UF) resin containing much more uron structure, were prepared. Several modified UF resins were obtained from mixing uron resins with normal UF resins as well as synthesizing UF resin with uron resin as raw material. This work demonstrated that the introducing of the uron structure reduced free formaldehyde content of UF resin and formaldehyde emission levels in bonded plywood panels significantly, the former were reduced by 76% and 84% in the latter. The synthesis time of uron resin can be shortened to 8 hours. The test result of free formaldehyde content, formaldehyde emission levels and bond strength indicated that specimen of 20 parts uron resin synthesized in 8 hours mixed with 100 parts UF resins (F/U molar ratio of 1.3) had a potential advantage to industrial application. The beneficial effect of uron resin on the performance of UF resin can be attributed to the opening of uron cycle structure and the following reaction with free formaldehyde and its oligomeric glycol forms.
1-Phenyl-3-(2,4,6-trimethoxyphenyl)prop-2-en-1-one
Jianzhang Wu,Li Zhang,Jing Wang,Shulin Yang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809041877
Abstract: In the title compound, C18H18O4, a derivative of biologically active chalcones, the dihedral angle between the two rings is 7.43 (7)°. The molecule adopts an E configuration about the central olefinic bonds. In the crystal, there are no strong interactions between the molecules.
Response of the Common Coots (Fulica atra) and other swimming birds to different human disturbances
骨顶鸡等游禽对不同人为干扰方式的响应

zhangweiwei,Ma jianzhang,li jin bo,
张微微
,马建章,李金波

生态学报 , 2011,
Abstract: The effects of human activities on the behavior of waterbird were conducted using the method of focal-animal sampling in wetlands of Anbanghe and Longfeng in Heilongjiang province from April to June in 2008 and 2009. Laser range finder was used to measure the responding distance and tolerance distance of the water birds. Three responding manners were mainly adopted by the coots when disturbance appeared: evade, run and flush. Our results showed that no significant difference was found between responding distances of the common coots to walking and motor vehicles(t=-0.818,df=51, P = 0.418). However, the tolerance distance of the coots to motor vehicles were significantly greater than that to the walking (t=4.236,df=198,P<0.001), indicated that the coots were more evasive to the noise caused by motor vehicles compared with the human activities. The percentage of coots' response to the disturbance was higher in Anbanghe wetland where the main disturbance type was the tourists' walking and the proportion of coots response to disturbances was less than 10%, indicating that the coots were more tolerant to motor vehicles than to human walking. In response to the boating disturbance, most of the coots flushed. However, when the disturbance source was human walking, 51.29% of the responding was evade, 38.46% was run on the water surface, and only 9.62% was flush. The degree of response manners was significantly correlated with the distance to disturbance. In Anbanghe wetland, the responding distance of the coots to boating disturbance was much greater than to walking; indicating that the coots were less tolerant to invading activities. Additionally, the tolerance distance, responding distance as well as the percentage of response to disturbance were also studied in other waterbirds of the Great Crested Grebe (Podiceps cristatus), Black Necked Grebe (Podiceps nigricollis), Little Grebe (Trachybaptus ruficollis), Common Moorhen (Gallinula chloropus), Common Pochard (Aythya ferina), Gadwall (Anas strepera), Mallard (Anas platyrhynchos), Spotbill Duck (Anas poecilorhyncha), Common Teal (Anas crecca), Garganey (Anas querquedula), Wigeon (Anas penelope) and Shoveler(Anas clypeata). The results showed that there was no significant difference in tolerance distances among three kinds of grebes. Compared to other birds, ducks seemed more sensitive to human disturbance, and there were significantly differences among eight kinds of ducks' tolerance distances (F7,319 = 7.516,P<0.001),. The Mallard and Spotbill Duck were more sensitive to human activities, and the flush response was about 60% when disturbance appeared. Compared to other ducks, the Common Pochards were more tolerant to the disturbance.It is concluded that buffer zones between water birds and human activities were needed to reduce the ocular and acoustical disturbances, and a set back distance of at least 100 m was advised in the tourist area.
Identifying the Genome-Wide Sequence Variations and Developing New Molecular Markers for Genetics Research by Re-Sequencing a Landrace Cultivar of Foxtail Millet
Hui Bai, Yinghao Cao, Jianzhang Quan, Li Dong, Zhiyong Li, Yanbin Zhu, Lihuang Zhu, Zhiping Dong, Dayong Li
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0073514
Abstract: Foxtail millet (Setaria italica) is a drought-resistant, barren-tolerant grain crop and forage. Currently, it has become a new model plant for cereal crops and biofuel grasses. Although two reference genome sequences were released recently, comparative genomics research on foxtail millet is still in its infancy. Using the Solexa sequencing technology, we performed genome re-sequencing on one important foxtail millet Landrace, Shi-Li-Xiang (SLX). Compared with the two reference genome sequences, the following genetic variation patterns were identified: 762,082 SNPs, 26,802 insertion/deletion polymorphisms of 1 to 5 bp in length (indels), and 10,109 structural variations (SVs) between SLX and Yugu1 genomes; 915,434 SNPs, 28,546 indels and 12,968 SVs between SLX and Zhang gu genomes. Furthermore, based on the Yugu1 genome annotation, we found out that ~ 40% SNPs resided in genes containing NB-ARC domain, protein kinase or leucine-rich repeats, which had higher non-synonymous to synonymous SNPs ratios than average, suggesting that the diversification of plant disease resistance proteins might be caused by pathogen pressure. In addition, out of the polymorphisms identified between SLX and Yugu1, 465 SNPs and 146 SVs were validated with more than 90% accuracy, which could be used as DNA markers for whole-genome genotyping and marker-assisted breeding. Here, we also represented an example of fine mapping and identifying a waxy locus in SLX using these newly developed DNA markers. This work provided important information that will allow a deeper understanding of the foxtail millet genome and will be helpful for dissecting the genetic basis of important traits in foxtail millet.
Construction of a Full-Length Enriched cDNA Library and Preliminary Analysis of Expressed Sequence Tags from Bengal Tiger Panthera tigris tigris
Changqing Liu,Dan Liu,Yu Guo,Taofeng Lu,Xiangchen Li,Minghai Zhang,Jianzhang Ma,Yuehui Ma,Weijun Guan
International Journal of Molecular Sciences , 2013, DOI: 10.3390/ijms140611072
Abstract: In this study, a full-length enriched cDNA library was successfully constructed from Bengal tiger, Panthera tigris tigris, the most well-known wild Animal. Total RNA was extracted from cultured Bengal tiger fibroblasts in vitro. The titers of primary and amplified libraries were 1.28 × 10 6 pfu/mL and 1.56 × 10 9 pfu/mL respectively. The percentage of recombinants from unamplified library was 90.2% and average length of exogenous inserts was 0.98 kb. A total of 212 individual ESTs with sizes ranging from 356 to 1108 bps were then analyzed. The BLASTX score revealed that 48.1% of the sequences were classified as a strong match, 45.3% as nominal and 6.6% as a weak match. Among the ESTs with known putative function, 26.4% ESTs were found to be related to all kinds of metabolisms, 19.3% ESTs to information storage and processing, 11.3% ESTs to posttranslational modification, protein turnover, chaperones, 11.3% ESTs to transport, 9.9% ESTs to signal transducer/cell communication, 9.0% ESTs to structure protein, 3.8% ESTs to cell cycle, and only 6.6% ESTs classified as novel genes. By EST sequencing, a full-length gene coding ferritin was identified and characterized. The recombinant plasmid pET32a-TAT-Ferritin was constructed, coded for the TAT-Ferritin fusion protein with two 6× His-tags in N and C-terminal. After BCA assay, the concentration of soluble Trx-TAT-Ferritin recombinant protein was 2.32 ± 0.12 mg/mL. These results demonstrated that the reliability and representativeness of the cDNA library attained to the requirements of a standard cDNA library. This library provided a useful platform for the functional genome and transcriptome research of Bengal tigers.
Interrelations among scientific fields and their relative influence revealed by input-output analysis
Zhesi Shen,Liying Yang,Jiansuo Pei,Menghui Li,Chensheng Wu,Jianzhang Bao,Tian Wei,Zengru Di,Ronald Rousseau,Jinshan Wu
Physics , 2015,
Abstract: In this paper, we try to answer two questions about any given scientific discipline: First, how important is each subfield and second, how does a specific subfield influence other subfields? We modify the well-known open-system Leontief Input-Output Analysis in economics into a closed-system analysis focusing on eigenvalues and eigenvectors and the effects of removing one subfield. We apply this method to the subfields of physics. This analysis has yielded some promising results for identifying important subfields (for example the field of statistical physics has large influence while it is not among the largest subfields) and describing their influences on each other (for example the subfield of mechanical control of atoms is not among the largest subfields cited by quantum mechanics, but our analysis suggests that these fields are strongly connected). This method is potentially applicable to more general systems that have input-output relations among their elements.
Study on effect of ions on photocatalytic degradation of methyl orange solution with phosphotungstic acid
几种阴阳离子对磷钨酸光催化降解甲基橙的影响

Li Minjiao,Zhong Junbo,Ma Di,Xie Bin,Li Jianzhang,
李敏娇
,钟俊波,马迪,谢斌,李建章

环境工程学报 , 2008,
Abstract: A great deal of saline wastewater is discharged during the regeneration process which used to renew the capability of ion exchange resin. Simulative experimental researches were carried out for the reuse treatment of this wastewater. Considering the different characters of the five regeneration phases, the wastewater can be separated into two parts: high concentration saline wastewater and lower concentration part. Two-step precipitation were applied to treat the high concentration saline wastewater, while the lower concentration part can be reused as clean water after small amount of flocculation medicament treatment or be directly recycled after small part is discharged. The experimental result shows that most amount of Ca2+ and Mg2+ in the high concentration wastewater can be removed, the clarifying saline water can be reused after adding salt and hydrochloric acid , and two kinds of sediments can also be recycled.
基于动态交通流的佛山市机动车网格化排放清单
Gridding emission inventory of vehicle exhaust in Foshan based on dynamic traffic flow information

李丽,刘永红,邓思欣,司徒淑聘,黄建彰
LI Li
, LIU Yonghong,DENG Sixin,SI TU Shupin,HUANG Jianzhang

- , 2017,
Abstract: 基于动态交通流信息和排放因子,以Arcgis为构建平台,运用自下而上的方法编制佛山市机动车网格化排放清单,分析污染物排放的时空分布特征。研究结果显示:2013年佛山市机动车尾气排放污染物CO、VOCs、NOx、PM总量分别为1.29×105、2.19 ×104 、3.61×104、1.15×103 t。机动车污染物高排放区域主要集中在城区中心以及城区中心向外辐射的路网上。机动车污染物日排放高峰期与车流量高峰期相对应,为每天的7:00-9:00和17:00-19:00。中心城区在进行排放控制时,应针对高峰时段进行改善,且主干路是排放控制的重点道路。要控制CO和VOCs排放,应该着重对国0标准轻型客车和国0、国Ⅰ标准摩托车进行交通管制,而控制NOx和PM的排放关键是国0标准货车、国Ⅲ标准大型客车和公交车
SEASONAL NUTRITIONAL QUALITY OF RED DEER AND ROE DEER FORAGES IN SOUTHERN XIAO XINGAN MOUNTAINS,CHINA
马鹿和狍饲料植物的营养质量

Ma Jianzhang,
马建章

生态学报 , 1996,
Abstract: In this study, the contents of 8 nutrients(CP,NDF,ADF,IVDDM,Ca,P,Na,K)were measured for the twigs and leaves of 14 browse species, sedges,forbs,ferns and the bark of Ulmus spp.,collected in the southern Xiao Xingan Mountains,northeastern China,from 1991 to 1992.The results show that there was a significant difference in the content of those 8 nutrients for each forage item(P<0.05).The seasonal content of crude protein was highest and lowest in the leaves and the twigs of browses,respectively.The seasonal content of neutral and acid detergent fiber(NDF and ADF)reached highest in the browse twigs, and decreased to the lowest level in forbs.The seasonal content of calcium was highest in the browse twigs and forbs,and lowest in the sedges.For the potassium,it was highest in the forbs and ferns,and lowest in the browse twigs.The seasonal content of phophorus and sodium changed greatly,and showed no consistant patterns in each forage item.The content of crude protein showed alittle seasonal variation in the browse twigs,but it decreased continuously in the browse leaves,sedges,forbs and ferns,from spring to autumn.Each forage item had lower content of NDF and ADF in spring than in other seasons.There was a decreasing trend in the content of potassium while different seasonal pattern of change existed in the content of calcium, potassium and sodium for each forage item from spring to winter.The in vitro digestible dry matter was positively and negatively related to the content of crude protein and ADF,respectively.
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