检索结果-南通市图书馆

The effect of amylose on kernel phenotypic characteristics,starch-related gene expression and amylose inheritance in naturally mutated high-amylose maize

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2020年第6期19卷 1554-1564页

作者： ZHANG Xu-dong GAO xue-chun LI Zhi-wei XU Lu-chun LI Yi-bo ZHANG Ren-he xue Jiquan GUO Dong-wei Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region Ministry of Agriculture and Rural Affairs/College of AgronomyNorthwest A&F UniversityYa ng ling 712100P.R.China Institute of Crop Science Quality of Plant ProductsUniversity of HohenheimStuttgart 70599Germany

High-amylose maize starch has great pote ntial for widespread in dustrial use due to its ability to form strong gels and film and in the food processi ng field,thus servi ng as a resista nt starch ***,there is still a substa ntial shortage of high-amylose maize due to the limitation of natural germplasm resources,although the well-known amylose extender(ae)gene mutants have bee n found to produce high-amylose maize lines since *** this con text,high-amylose maize lines(13 inbreds and 18 hybrids)originating from a natural amylose mutant in our testing field were utilized to study the correlation between amylose content(AC)and phenotypic traits(kernel morphology and endosperm glossiness),grain filling characteristics,gene expression,and amylose *** results showed that AC was negatively correlated with total starch con tent but was not correlated with grain phe no types,such as kernel full ness,kernel morphology and endosperm *** lines with higher amylose had a greater grain filling rate than that of the controI(B73)during the first 20 days after pollination(DAP).Both starch debranching enzyme(DBE)groups and starch branching enzyme lib(SBEIIb)groups showed a greater abundance in the control(B73)than in the high-amylose maize *** parents directly predicted AC of Fv which was moderately positively correlated with the F2 generation.

关键词： starch biosynthesis amylose inheritance high-amylose maize grain filling rate

High-density lipoprotein as a potential carrier for delivery of a lipophilic antitumoral drug into hepatoma cells

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2005年第7期11卷 954-959页

作者： BinLou xue-LingLiao Man-PingWu Pei-FangCheng chun-YanYin ZhengFei DepartmentofBiochemistry SchoolofPharmacyFudanUniversityShanghai200032China

AIM: To investigate the possibility of recombinant highdensity lipoprotein (rHDL) being a carrier for delivering antitumoral drug to hepatoma cells. METHODS: Recombinant complex of HDL and aclacinomycin (rHDL-ACM) was prepared by cosonication of apoproteins from HDL (Apo HDL) and ACM as well as phosphatidylcholine. Characteristics of the rHDL-ACM were elucidated by electrophoretic mobility, including the size of particles, morphology and entrapment efficiency. Binding activity of rHDL-ACM to human hepatoma cells was determined by competition assay in the presence of excess native HDL. The cytotoxicity of rHDL-ACM was assessed by MTT method. RESULTS: The density range of rHDL-ACM was 1.063-1.210 g/mL, and the same as that of native HDL. The purity of all rHDL-ACM preparations was more than 92%. Encapsulated efficiencies of rHDL-ACM were more than 90%. rHDL-ACM particles were typical sphere model of lipoproteins and heterogeneous in particle size. The average diameter was 31.26±5.62 nm by measure of 110 rHDL-ACM particles in the range of diameter of lipoproteins. rHDL-ACM could bind on SMMC-7721 cells, and such binding could be competed against in the presence of excess native HDL. rHDL-ACM had same binding capacity as native HDL. The cellular uptake of rHDL-ACM by SMMC-7721 hepatoma cells was significantly higher than that of free ACM at the concentration range of 0.5-10 μg/mL (P<0.01). Cytotoxicity of rHDL-ACM to SMMC-7721 cells was significantly higher than that of free ACM at concentration range of less than 5 ug/mL (P<0.01) and IC50 of rHDL-ACM was lower than IC50 of free ACM (1.68 nmol/L vs3 nmol/L). Compared to L02 hepatocytes, a normal liver cell line, the cellular uptake of rHDL-ACM by SMMC-7721 cells was significantly higher (P<0.01) and in a dose-dependent manner at the concentration range of 0.5-10 μg/*** of the rHDL-ACM to SMMC- 7721 cells was significantly higher than that to L02 cells at concentration range of 1-7.5μg/mL (P<0.01). IC50 for S

关键词： High-density lipoprotein Carrier Antitumoral drug: SMMC-7721 hepatoma cell

An analog of Friedel oscillations in nanoconfined water

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2022年第9期9卷 204-211页

作者： Minmin xue Zhili Hu Hu Qiu chun Shen Wanlin Guo Zhuhua Zhang Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education State Key Laboratory of Mechanics and Control of Mechanical Structures and Institute for Frontier Science Nanjing University of Aeronautics and Astronautics

Water confined in nanometer-scale crevices and cavities underpins a wide range of fundamental processes,such as capillary flow,ion transport and protein ***,how water responds within these confined spaces,with prevalent inhomogeneity built in or caused by impurities,is not well ***,we show theoretically that water confined in one-dimensional nano channels with localized perturbation exhibits pronounced density *** oscillations occur vividly like the Friedel oscillations in electron density resulting from defects in metals.A model analysis reveals that the density oscillations result from the perturbation-induced molecular scattering that is augmented by the confinement-enhanced correlation of water *** renders the oscillations a general behavior independent of the channel geometries and specific forms of the *** confinements comparable to biological ion channels,such oscillations can strikingly extend over 10 nm,resulting in non-trivial effects at large distances that,for example,repel all ions from the channels with their long-range *** results deepen the understanding of biological functions and inspire new applications in a variety of domains,such as ionic sensing and seawater desalination.

关键词： ion sieving Friedel oscillations confined water water transport

Adaptation of Drosophila species to climate change——A literature review since 2003

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2019年第4期18卷 805-814页

作者： xue Qi Muhammad Zeeshan Majeed ZHANG Wei MA chun-sen State Key Laboratory for Biology of Plant Disease and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Department of Entomology College of Agriculture University of Sargodha

Global climate warming has been exerting impacts on agricultural pests. Pests also take some strategies to adapt to climate change. Understanding such adaptation could benefit more accurate predictions and integrated management of pest. However, adaptation to climate change has not been widely investigated in agricultural pests but has been well documented in model species, Drosophila, and reviewed by Hoffmann before 2003. To provide recent progress and references for agricultural entomologists who interested in thermal biology, here we have reviewed literatures since 2003 about adaptation to temperature changes under climate change. We mainly summarized thermal adaptation of Drosophila(especially to high temperatures) from three aspects, behaviors, plastic responses and micro-evolution and discussed how Drosophila increases their heat tolerance through these three mechanisms. Finally, we summarized the measures of thermotolerance and concluded the main progress in recent decade about the behavioral thermoregulation, mortality risks driven by limited evolutionary and plastic response under climate change, geographic distribution based on basal rather than plastic thermotolerance. We propose future work focus on better understanding adaptation of organisms including agricultural pests to climate change.

关键词： global warming phenotypic plasticity acclimation parental effect thermal tolerance

Morphological changes of gonadotropin-releasing hormone neurons in the rat preoptic area across puberty

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2014年第13期9卷 1303-1312页

作者： Haogang xue Xiaodong Gai Weiqi Sun chun Li Quan Liu Department of Orthopedic Surgery Affiliated Hospital of Beihua University Department of Pathology Beihua University College of Public Health Beihua University Department of Cardiovascular Disease the First Hospital of Jilin University

Gonadotropin-releasing hormone （GnRH） neurons in the preoptic area may undergo morphological changes during the pubertal period when their activities are upregulated. To clarify the regulatory mechanism of puberty onset, this study aimed to investigate the morphological changes of GnRH neurons in the preoptic area of GnRH-enhanced green fluorescent protein transgenic rats. Under confocal laser microscopy, pubertal GnRH neurons exhibited an inverted Y distribution pattern. Prepubertal GnRH neurons were generally unipolar and bipolar, and were distinguished as smooth type cells with few small processes or irregular type cells with many spine-like processes in the proximal dendrites. The number of GnRH neurons in the preoptic area and spine-like processes were increased during the course of reproductive maturation. There was no significant difference between male and female rats. Immunofluorescence staining revealed synaptophysin punctae close to the distal end of GnRH neurons, indicating that some presynaptic terminals may form a synaptic linkage with these neurons.

关键词： nerve regeneration preoptic area gonadotropin-releasing hormone neurons pubertalperiod luteinizing hormone transgenesis bipolar neurons neural regeneration

Scapular metastasis from acinic cell carcinoma of parotid gland:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第9期13卷 41-46页

作者： Deng-Qun Sun Chang-chun Chen Duo-An Zheng Hai-Yan Xing xue Peng Department of General Surgery The Chinese People’s Armed Police Forces Anhui Provincial Corps HospitalHefei 230001Anhui ProvinceChina Department of Radiology The Chinese People’s Armed Police Forces Anhui Provincial Corps HospitalHefei 230001Anhui ProvinceChina Department of Pathology The Chinese People’s Armed Police Forces Anhui Provincial Corps HospitalHefei 230001Anhui ProvinceChina

BACKGROUND Acinic cell carcinoma(ACC)is a malignant epithelial neoplasm that commonly occurs in the parotid *** is known to have a high recurrence rate and the potential to metastasize to the lung or cervical lymph ***,few cases of ACC with bone metastasis have been reported in the medical *** SUMMARY The clinical significance of this case report lies in the unique site of occurrence of the metastasis:To the best of our knowledge,this report is the only literature documenting ACC arising in a shoulder *** Unusual presentations of uncommon malignancies can present diagnostic challenges for both surgeons and *** is important to be aware of these rare occurrences in order to provide the best possible treatment for patients.

关键词： Acinic cell carcinoma Shoulder mass Scapular Metastasis Case report

Study on the interaction between clarithromycin and bovine serum albumin in the imitated physiology solution

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第6期18卷 726-729页

作者： She Ying Dong chun Xia xue Ting Lin Huang College of Sciences Xi’an University of Architecture and Technology Xi’an 710055 Shaanxi China School of Environment and Municipal Engineering Xi’an University of Architecture and Technology Xi’an 710055 Shaanxi China

The interaction between clarithromycin (CAM) and bovine serum albumin (BSA) was investigated using linear-sweep voltammetry in pH 7.4 phosphate buffer solution where CAM caused two irreversible reduction waves P2 and P3 on mercury electrode. The study showed that the formation constant and formation ratio for the interaction between CAM and BSA were 1.51 × 10(12) and 3:1 for P2, 4.53 × 10(5) and 1:1 for P3, respectively. The ion strength enhanced the hydrophobic interaction between CAM and BSA.

关键词： Clarithromycin Bovine serum albumin Interaction Linear-sweep voltammetry

Synthesis and Primary Research on Antitumor Activity of Three New Panaxadiol Fatty Acid Esters

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2007年第2期23卷 176-182页

作者： ZHANG chun-hong LI Xiang-gao GAO Yu-gang ZHANG Lian-xue FU xue-qi Academy of Chinese Traditiorial Medicine Jilin Agricultural University Changchun 130118 P. R. China Edmond H. Fischer Signal Transduction Laboratory College of Life Sciences Jilin University Changchun 130021 P. R. China

For making use of Ginseng resources that exhibit an antitumor activity and for finding new anticancer drugs, three new fatty acid ester compounds： 3/β-acetoxy panaxadiol （ Ⅰ ）, 3β-palmitic acid aceloxy panaxadiol （ Ⅱ ） , and 3β-octadecanoic acid aceloxy panaxadiol（ Ⅰ , Ⅱ, and m） were synthesized with panaxadiol, diacetyl oxide, palmityl chloride and stearyl chloride, and their structures were determined via MS, ^13C NMR, IR, TLC, and so on. The molar yields of the three compounds are 75.14%, 79. 08%, and 72. 57%, respectively. Meanwhile, the antitumor activity of the three new panaxadiol fatty acid ester derivatives and panaxadiol was compared by using the method of MTT. Tumor cell used was Vero cell line. Positive control was 5-FU, blank was an RPMI1640 culture medium, negative control was an RPMI1640 culture medium and the solvent for drugs to be tested. Compound Ⅰ has the strongest antitumor activity followed by panaxadiol; compounds Ⅱ and Ⅲ have similar and weakest antitumor activities. Furthermore, the antitumor activities of the panaxadiol fatty acid ester derivatives show positive correlation with the concentration of the test group, but show no relationship with the molecular weight of fatty acid. The methods that are used to synthesize the three compounds with high yields and strong antitumor activities are simple and show a great potential for meeting the needs of industrial manufacture of these drugs.

关键词： Synthesis Panaxadiol fatty acid esters Anti-tumor activity

Improved Stability Criteria on Discrete-time Systems with Time-varying and Distributed Delays

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2013年第3期10卷 260-266页

作者： Ting Wang Ming-Xiang xue chun Zhang Shu-Min Fei Key Laboratory of Measurement and Control of Complex Systems of Engineering School of Automation Southeast University

This work was supported by National Natural Science Foun- dation of China （Nos. 60905009, 61004032, 61104119, 61174076, and 61172135）, and Jiangsu Province Natural Science Foundation （Nos. SBK201240801 and BK20123... 详细信息

关键词： Discrete-time system global stability interval time-varying delay distributed delay reciprocal convex technique.