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

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dietary free fatty acids complex with amylose creating another form of resistant starch: Gastrointestinal formation with fowl and swine

引用

Animal Nutrition 2021年第4期7卷 1124-1132页

作者： Edwin T.Moran Jr. Poultry Science Department Auburn UniversityAL36849-5416USA

Fat added to poultry and swine feeds often contains abundant free fatty acids(FFA)that can impair digestible energy(DE).Placement of the fatty acid(FA)hydrocarbon chain in the helix core reformed from amylose creates a complex of both *** modifications create a new structure termed the V-helix that becomes resistant toα-*** in grain naturally contain minimal amounts of these complexes with more being generated during food manufacturing when moisture and heat release amylose in the presence of FFA.A paucity of FFA usually exists in complete feeds without sources of poorquality *** fats and by-product meals from rendering are prominent in their saturated FFA content which favorably complex within the helix.V-helix-FA complexes may arise during their concurrent encounter of FFA together with amylose during feed manufacture,particularly *** in the gastrointestinal tract(GIT)are speculated to further form complexes when present together with *** amylose may be dissolved in the gastric and small intestinal milieu,FFA separately coalesce into hydrophobic fat droplets along with other dietary *** of complexes is likely restricted until FFA are released into the aqueous phase during fat ***α-amylase may be prominent,V-helix-FA complexes being resistant to enzymic attack pass into the large *** microbial catabolism of V-helices may generate volatile fatty acids that are absorbed by the mucosa;however,an inability to use FFA once released leads to their excretion and basis for decreased *** microbial populations with young animals usually lack the capacity to fully catabolize the V-helix,further extending the loss in DE.

关键词： amylose Digestible energy Free fatty acid Feed manufacture

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

‘Hierarchical self-assembly’ of helical amylose/SWNTs complex

引用

Science China Chemistry 2008年第3期51卷 269-274页

作者： FU ChuanLong MENG LingJie LU QingHua School of Chemistry and Chemical Technology Shanghai Jiaotong UniversityShanghai 200240China

Helical amylose/SWNTs complexes (A/S-C) of various sizes, a single nanotube wrapped by amylose in particular, were demonstrated. The formation process of the helical A/S-C was further explained by a novel hierarchical self-assembly model, including the wrapping of amylose chains around SWNT and the hierarchical self-assembly of wrapped-SWNTs into the superstructural A/S-C. Besides the hydrophobic interaction, the hydrogen bonding also plays a certain role in the self-assembly process.

关键词： self-assembly SWNT amylose helical hydrogen bonding

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Expression Profiles and Protein Complexes of Starch Biosynthetic Enzymes from White-Core and Waxy Mutants Induced from High amylose Indica Rice

引用

Rice science 2020年第2期27卷 152-161页

作者： CHEN Yaling PANG Yuehan BAO Jinsong Institute of Nuclear Agricultural Sciences College of Agriculture and BiotechnologyHuajiachi CampusZhejiang UniversityHangzhou 310029China College of Life Sciences Jiangxi Normal UniversityNanchang 330022China

Physicochemical properties of endosperm starches in milled rice determine its cooking and eating *** is synthesized by granule-bound starch synthase I(GBSSI),whilst amylopectin is synthesized by the synergistic activities of starch synthases(SSs),branching enzymes(BEs)and debranching enzymes(DBEs).However,the complexes formed by starch biosynthetic enzymes are not well *** expression profiles and protein complexes were determined in white-core(GM645)and waxy(GM077)mutants derived from a high amylose indica rice Guangluai 4(GLA4).In GM645,genes including AGPS1,GBSSI,SSIIa,BEI,BEIIa,BEIIb,PUL,ISA1 and SP were significantly downregulated during seed *** GM077,the expression levels of AGPL2,AGPS1,AGPS2b,SSIIIa,BEI,PUL and ISA1 were significantly ***-immunoprecipitation assays revealed interactions of SSs-BEs,SSs-PUL and BEs-PUL in developing ***,weak SSI-SSIIa interaction was detected in GM077,whilst SSI-PUL interaction was *** interaction signals for SSI-SSIIa,SSIIa-BEI,SSIIa-BEIIb,BEI-BEIIb and SSI-BEI were also observed in *** results suggest that the protein-protein interactions for starch biosynthesis are modified in mutants,which provides insight into the mechanisms of starch biosynthesis,particularly in indica rice.

关键词： amylose endosperm mutant indica rice protein-protein interaction starch biosynthetic enzyme waxy rice

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High amylose to amylopectin ratios in nitrogen-free diets decrease the ileal endogenous amino acid losses of broiler chickens

引用

Animal Nutrition 2023年第3期14卷 111-120页

作者： Huajin Zhou Tahir Mahmood Wei Wu Yanhong Chen Yao Yu Jianmin Yuan State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Adisseo Animal Nutrition DMCCDubai 00000United Arab Emirates

This study explored the variation of ileal endogenous amino acid(IEAA)losses and its influencing factors in chickens offered nitrogen-free diets(NFD)containing different ratios of amylose to amylopectin(AM/AP).A total of 252 broiler chickens at 28 d old were randomly allocated into 7 treatment groups for a 3-d *** dietary treatments included a basal diet(control),a NFD containing corn starch(CS),and 5NFD with AM/AP ratios of 0.20,0.40,0.60,0.80,and 1.00,*** the AM/AP ratio increased,the IEAA losses of all AAs,starch digestibility and maltase activity linearly decreased(P<0.05),but the DM digestibility linearly and quadratically decreased(P<0.05).Compared with the control,the NFD increased the number of goblet cells and its regulatory genes mucin-2 and krüppel-like factor 4(KLF-4)while decreasing serum glucagon and thyroxine concentrations,ileal villus height,and crypt depth(P<0.05).Additionally,NFD with lower AM/AP ratios(0.20 and 0.40)decreased the ileal microbiota species richness(P<0.05).In all NFD groups,the number of Proteobacteria increased whereas the abundance of Firmicutes dropped(P<0.05).However,the broilers in the AM/AP 0.60 group were closer to the digestive physiological state of chickens fed the control diet,with no significant change in maltase activity and mucin-2 expression(P<0.05).In conclusion,increasing AM/AP ratio in a NFD decreased the IEAA losses and the apparent ileal digestibility of starch but inevitably resulted in malnutrition and disruption of gut microbiota *** study recommends AM/AP in NFD at 0.60 to measure IEAA of broiler chickens.

关键词： Broiler chicken Endogenous amino acid losses Nitrogen-free diet amylose Amylopectin Goblet cells

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

amylose contents of cereals; influence of household processing on the amylose contents of these foods

引用

Journal of Agricultural Science and Technology 2009年第6期3卷 1-5,12页

作者： Nizakat Bibi Zahid Mehmood Aurang Zeb Nuclear Institute for Food and Agriculture Tarnab Peshawar 25000 Pakistan

amylose is a food starch found in cereals, legumes and root vegetables. Keeping in view the importance of amylose for various food industries as well as its importance on domestic level, the current study was conducted to analyze the amylose content of common cereals e. g rice （sela, coarse and basmati）, maize yellow, Kisan and Azam varieties and wheat （Tatara, Fakhr-e-sarhad and Bakhtawar-92） varieties as well as quantifying the influence of cooking/boiling procedures on the amylose contents of cereals. The maximum amylose content were observed for wheat variety Tatara （24.28%） followed by Bakhtawar-92 （22.74%） and Fakhr-e-sarhad （19.77%）. Among maize and rice varieties studied, Kisan and course rice were rich in amylose content with values of 27.19 and 30.48% respectively. The chapti of Tatra wheat were scored highest for appearance （7.6）, flavor （7.5）, texture （7.6） and overall acceptability （7.55）. The roti of Kisan and Azam varieties got maximum appearance score of 7.6 as compared to 7.4 for maize yellow variety. Basmati rice was scored highest regarding appearance （8.4）, flavor （8.6）, texture （8.6） and overall acceptability （8.53. The moisture content ranged from 10.61 （Azam） to 8.01% （wheat variety Fakhr-e-sarhad）. Cooking reduced the amylose content of wheat bread from （19.77%-24.28%） to （15.47%-15.94%） with cooking time of 5 min, maize bread from （21.48%-27.19%） to （19.53 %-25.85%） with maximum cooking time of 10 min and boiled rice from （24.90%-30.48%） to （24.18%-30.19%） with cooking time ranging from 12 to 20 min. It can be inferred from these studies that the reduction in amylose content were more in chapti/roti preparation of wheat and maize varieties as compared to boiling of rice varieties and that significant varietals differences exist in amylose content of the uncooked samples.

关键词： wheat maize rice amylose cooking sensory evaluation

来源：

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

Hydrogen Bonds Sites of amylose or Amylopectin from Starch at the ONION Level (B3LYP/6-311++G [d, p]: AM1)

引用

Computational Chemistry 2021年第1期9卷 85-96页

作者： Ablé Anoh Valentin N’Guessan Boka Robert Bamba El Hadji Sawaliho Laboratoire de Constitution et de Réaction de la Matière UFR SSMT Université Félix Houphou&#235t-Boigny Abidjan C&#244te d’Ivoire

The research aims to help reduce the enormous post-harvest losses of rice or bananas in Cote d’Ivoire. It focuses on the breakdown mechanism of their starch. This process contributes to their decay. This study wants to elucidate it;to do this, it analyzes the tetra or penta saccharide reactions with the water or dioxide carbon. It calculates the geometric, energetic and spectroscopic parameters at the ONIOM level (B3LYP/6-311++G [d, p]: AM1). These quantities allow establishing that oxygen represents the privileged hydrogen bond (HB) site for amylose with four or five D-glucose building blocks. They suggest and are respectively those of amylopectin when the latter consists of four and five D-glucose synthons. They prove that amylose deteriorates before it;the degradation of starch begins with its alteration into disaccharides. It continues with that of amylopectin into tri or tetra-saccharides with four or five building blocks.

关键词： Hydrogen Bonds Glucose amylose Amylopectin

来源：

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

Targeted and Controlled Release of Indomethacin from a Prodrug of amylose

Targeted and Controlled Release of Indomethacin from a Prodr...

引用

第七届亚太地区医学与生物学工程学术年会

作者： Xiang Cai1 Liqun Yang1 Yifu Huang1 Ningfu Peng2 Li-Ming Zhang1 Qing Wu1 Rufu Chen2 1Institute of Polymer Science School of Chemistry and Chemical Engineering Sun Yat-Sen University Guangzhou P. R. China 2 Department of Hepatobiliary Surgery Second Affiliated Hospital of Sun Yat-sen University Guangzhou P. R. China

A series of prodrugs of amylose grafted with in-domethacin （IND） were mildly synthesized at room tempera-ture and their chemical structures were characterized by FTIR and 1H NMR spectroscopy. The results showed that IND was conjugated with amylose through the ester bond. The loaded IND content in each prodrug was determined to be 1.8, 2.7, 4.8, 12.0, 15.6 and 21.6 mg/g from UV spectroscopy. For in vitro experiment, the simulated medium for stomach and small intestine was a chloric acid solution （pH 1.2）, and a sodium phosphate buffer solution （pH 6.8） containing porcine pan-creatin. A culture fermentation system was used to simulate the colonic condition. The results indicated that IND was hardly released in the simulated stomach medium, but could be controlled released by hydrolysis of the prodrug through α-amylase and lipase in the simulated small intestine and colonic conditions. The pharmacokinetic analysis indicated that Tmax, the time at which a maximum concentration of drug in the plasma, was 2.1 h for free IND. But it was prolonged to 5.2 - 8.8 h for the prodrugs. Meanwhile, the maximum drug concentration in the plasma （Cmax） decreased from 25.8 μg/mL for free IND to 0.5 - 7.0 μg/mL for the prodrugs. It further proved that the prodrug could realize controlled release IND.

关键词： Prodrug amylose Indomethacin Release

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Inhibition of osteosarcoma growth and metastasis using a polysaccharide derivative of Amy-g-PLLD for the delivery of AEG-1 siRNA

引用

Nano Research 2018年第7期11卷 3886-3898页

作者： Fen Wang Jiadong Pang Leilei Huang Ran Wang Qing Jiang Liming Zhang Kang Sun Department of Pathology The First Affiliated Hospital of Sun Yat-sen University Guangzhou 510080 China PCFM Lab and GDHPPC Lab School of Materials Science and Engineering Sun Yot-sen University Guongzhou 510275 Chino School of Engineering Sun Yat-sen University Guangzhou 510006 China School Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments Sun Yat-sen University Guangzhou S 10006 China

Osteosarcoma is the most common primary malignant neoplasm of the bone in children and adolescents and has a high risk of relapse and metastasis. Of the various methods to treat osteosarcoma, the use of genetic approaches to inhibit the rapid growth of osteosarcoma while limiting tumor metastasis has presented a challenge in its implementation. Here, we successfully synthesized a polysaccharide derivative （Amy-g-PLLD） for delivery of astrocyte elevated gene-1 （AEG-1） small-interfering RNA （siRNA）（siAEG-1）, and used it for the first time to suppress osteosarcoma tumors in vitro and in vivo. Amy-g-PLLD/ siAEG-1 complexes were delivered into 143B human osteosarcoma cells with low resultant cytotoxicity. Osteosarcoma tumor proliferation and invasion were inhibited in vitro. Intratumoral injection of Amy-g-PLLD/siAEG-1 complexes markedly inhibited tumor growth and lung metastasis in 143B tumor-bearing mice. This biocompatible and effective approach employing a natural material- siRNA complex should pave the way for more genetic research in treating osteosarcoma.

关键词： osteosarcoma amylose gene delivery astrocyte elevated gene-1(AEG-1) small-interfering RNA (siRNA)

来源：

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

Effects of Polishing on Proximate Composition,Physico-Chemical Characteristics,Mineral Composition and Antioxidant Properties of Pigmented Rice

引用

Rice science 2017年第5期24卷 241-252页

作者： Chagam Koteswara REDDY Lalmuan KIMI Sundaramoorthy HARIPRIYA Nayoung KANG Department of Food Science and Technology Pondicherry University School of Life Sciences and Biotechnology Korea University

The effects of polishing on proximate compositions,physico-chemical characteristics,mineral compositions and antioxidant properties of the rice flours obtained from three different pigmented rice varieties(Chak-hao Angangba,Chak-hao Amubi and Chak-hao Poireiton) were *** rice varieties were significantly(P amylose content and lightness were increased.X-ray diffraction pattern of rice flours exhibited A-type crystalline pattern with reflections at 15.1o,17.1o,18.2o and *** properties and transition temperatures were decreased after polishing *** resulted in changes in the crystallinity,enthalpy and morphology of rice flours.

关键词： amylose antioxidant property crystallinity gelatinization mineral pigmented rice polishing pasting property bran

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：