Five-Strokes Encoding Recognition of Unconstrained Handwritten Chinese Character     

HUANG Xiang nian  CHENG Ping  YANG Bo  HUANG Min  LONG Hui min 《保鲜与加工》2000,(3):87-90

Keyboard input techniques are introduced into on line recognition of Chinese character with the study of chinese character five strokes encoding keyboard input method,and a new approach for on line recognition of unconstrained handwritten Chinese character,Five Strokes Encoding Recognition,is proposed.Besides,the set of character roots of Five Strokes have to be altered slightly to meet the on line recognition technique's features.  相似文献   

Variation among Rice Cultivars in Root Acidification and Its Relation to Cadmium Uptake     

LIU Jian-guo XU Hai CAI Guo-liang QIAN Min WANG De-ke ZHU Qing-sen 《水稻科学》2006,13(4):278-282

Cadmium (Cd) is one of the most toxic pollutants, which can easily enter into food chain through cereal. Excessive intake of Cd by human body may damage kidney and has several other chronic effects [1]. Though plants do not require Cd for growth and development, but the bioaccumulation index of Cd in plants is high and may exceed many essential elements [2]. Moreover, Cd may pose a risk to human and animal health at plant tissue concentrations that are not generally phytotoxic [3]. Therefore…  相似文献   

Promotion and Inhibition of Ruminal Epithelium Growth by Butyric Acid and Insulin-Like Growth Factor-1（IGF-1） in Dairy Goats   总被引：1，自引：0，他引：1  

LIU Da-cheng  ;ZHOU Xiang-li  ;LIU Guo-juan  ;GAO Min  ;HU Hong-lian 《中国农业科学(英文版)》2014,(9):2005-2009

Isolated ruminal epithelia from caudal blind sacs of dairy goats were incubated with butyrate and insulin-like growth factor-1（IGF-1） at different concentrations. Proportions of ruminal epithelium in different phases of the cell division cycle were determined by flow cytometric analysis. The proportion of epithelial cells in S phase and G2-M phase（PS＆G2-M） increased significantly（P〈0.01） whereas the proportion of epithelial cells in G0-G1 phase（PG0-G1） decreased after incubation with IGF-1. PS＆G2-M decreased whereas PG0-G1 increased markedly（P〈0.01） after incubation with sodium butyrate. PS＆G2-M incubated with IGF-1 and butyrate sodium together increased more than that incubated with IGF-1 alone; PG0-G1, however, decreased significantly（P〈0.01）. Our results indicate that IGF-1 enhances whereas sodium butyrate inhibits the proliferation of rumen epithelial cells. Furthermore, butyrate and IGF-1, together, have a synergic effect on the proliferation of rumen epithelium.  相似文献   

我国过洋性渔业中底拖网渔具渔法的选择     

张敏 Min.  Z 《上海海洋大学学报》1996,(3):209-212

我国远洋渔业的发展起源于底拖网作业。目前，我国西非渔业项目中，底拖网作业占绝对重要的地位，它与延纪钓作业、围网作业相比较，无论是渔船的数量、从业人数、还是经济效益核算均处于首位。底拖网作业中，提高生产和经济效益的关键之一是合理地选择渔具渔法。因此，实际生产中，如何根据不同的捕捞对象、渔场条件对渔具渔法作相应的选择就显得相对重要。1渔具渔法的选择我国过洋性底拖网作业主要的捕捞对象为头足类、甲壳类和底层经济鱼类（头足类主要为章鱼、墨鱼和鳅鱼，甲壳类主要为对虾和大西洋仿对虾，底层鱼类主要为舌规、真明、…  相似文献   

营养和病虫害管理对双季杂交水稻种植系统的土壤生态质量的共同影响   总被引：4，自引：0，他引：4  

LIAO Min  XIE Xiao-Mei  A. SUBHANI 《土壤圈》2003,13(2):129-138

The mineral fertilizers(NPK) and pesticide,including herbicides,insecticides and fungicides,were applied alone or in combination and the soil sampling was done at different growth stages during the crop cycle to study the changes in soil organic matter,microbial biomass and their activity parameters in a paddy soil with different nutrient and pest management practices in a hybrid rice double-cropping system.A consistent increase in the electron transport system(ETS) activity was measured during the different crop growth stages of rice.The use of fertilizers(NPK) alone or with pesticides increased ETS activity,while a decline of ETS activity was noticed with pesticides alone as compared with the control.Nearly an increasing trend in soil phenol content was observed with the progression of crop growthstages,while the usage of pesticides alone caused maximum increments in the soil phenol content.The soil protein content was found nearly stable with fertilizers and/or pesticides application at various growth stages in both crops taken.But notable changes were noticed at different growth stages probable because of fluctuations in moisture and temperature at particular stages,which might have their effects on N mineralization.Marked depletions in the phospholipid content were found with the advancement of crop growth stages,while the incorporation of fertilizers and/or pesticides also produced slight changes,in which a higher decline was noticed with pesticide application alone compared with the control.  相似文献   

Flavor, color, and vitamin C retention of pulsed electric field processed orange juice in different packaging materials   总被引：14，自引：0，他引：14  

Ayhan Z  Yeom HW  Zhang QH  Min DB 《Journal of agricultural and food chemistry》2001,49(2):669-674

Effects of packaging materials, storage temperature, and time on the stability of pulsed electric field (PEF) processed orange juice were investigated. Single-strength orange juice was treated with PEF at an electric field strength of 35 kV/cm for 59 micros using an integrated pilot plant scale PEF processing and glovebox packaging system. The retention of eight orange juice aroma compounds, color, and vitamin C in glass, polyethylene terephthalate (PET), high-density polyethylene, and low-density polyethylene were evaluated at 4 and 22 degrees C for 112 days. Packaging material had a significant effect (p < or = 0.05) on the retention of orange juice aroma compounds, color, and vitamin C. PEF-treated orange juice had a shelf life of >16 weeks in glass and PET at 4 degrees C.  相似文献   

油中抗氧化剂的分析     

Min  Ticknor  Schweizer  胡祥龙 《粮食储藏》1983,(2)

前言食品中常常加入抗氧化剂,以减少油脂的氧化作用。据报导,1967年美国食品制造业使用了一千五百万磅以上的抗氧化剂。许多学者都曾经研究过BHA(叔丁基对羟基茴香醚)和BHT(2,6-二叔丁基对甲酚)的安全性。有人曾全面评述了BHA和BHT的毒理学和生物化学,涉及所观察到的病理效应、致癌潜力、BHA和BHT与酶和脂类的相互作用,BHA和BHT对再生的影响和它们的代谢。学者们对长期使用这些抗氧化剂的安全性是有争论的。法定抗氧化剂的最大使用量为食品中含油量的200ppm。据报导,此剂量乃是由各种动物进行急性和慢性临床毒性实验结果确定的。  相似文献   

Developing transgenic maize (Zea mays L.) with insect resistance and glyphosate tolerance by fusion gene transformation     

SUN He  LANG Zhi-hong  LU Wei  ZHANG Jie  HE Kang-lai  ZHU Li  LIN Min  HUANG Da-fang 《中国农业科学(英文版)》2015,(2):305-313

Using linker peptide LP4/2A for multiple gene transformation is considered to be an effective method to stack or pyramid several traits in plants. Bacillus thuringiensis(Bt) cry gene and epsps(5-enolpyruvylshikimate-3-phosphate synthase) gene are two important genes for culturing pest-resistant and glyphosate-tolerant crops. We used linker peptide LP4/2A to connect the Bt cry1 Ah gene with the 2m G2-epsps gene and combined the wide-used man A gene as a selective marker to construct one coordinated expression vector called p2 EPUHLAGN. The expression vector was transferred into maize by Agrobacterium tumefaciens-mediated transformation, and 60 plants were obtained, 40% of which were positive transformants. Molecular detection demonstrated that the two genes in the fusion vector were expressed simultaneously and spliced correctly in translation processing; meanwhile bioassay detection proved the transgenic maize had preferable pest resistance and glyphosate tolerance. Therefore, linker peptide LP4/2A provided a simple and reliable strategy for producing gene stacking in maize and the result showed that the fusion gene transformation system of LP4/2A was feasible in monocot plants.  相似文献   

Biotransformation and impact of ferulic acid on phenylpropanoid and capsaicin levels in Capsicum annuum L. cv. P1482 cell suspension cultures     

Kang SM  Jung HY  Kang YM  Min JY  Karigar CS  Yang JK  Kim SW  Ha YR  Lee SH  Choi MS 《Journal of agricultural and food chemistry》2005,53(9):3449-3453

Cell suspension cultures of Capsicum annuum L. cv. P1482 were fed with exogenous ferulic acid to monitor their biotransformation abilities. A portion of the ferulic acid was biotransformed into vanillin, a major natural flavor, and capsaicin, a principle secondary metabolite characteristic of Capsicum species. The cellular vanillin concentrations were relatively higher than capsaicin levels and were maximal (2 mg/g DW) 4 days after 0.6 mM ferulic acid feeding. Maximal vanillin levels in the culture medium were 10 mg/L at 4 and 3 days after feeding with 1.25 and 2.5 mM ferulic acid, respectively. With regard to capsaicin levels, the cellular levels were slightly decreased by ferulic acid feeding, whereas the levels in the culture medium were increased. Ferulic acid feeding not only enhanced vanillin and capsaicin production but also increased the concentrations of other phenylpropanoid metabolites.  相似文献   

中国乌鲁木齐土壤中有机氯的来源、组成与风险评价     

CHEN Min  CHEN Li  HUANG Ping 《土壤圈》2015,25(6):888-900

Twenty-eight surface soil samples from 5 functional zones (park, traffic roadside, business/residential area, rural area, and industrial area) of Ürümqi, China were collected and analyzed for the concentrations of 14 organochlorine pesticides (OCPs), such as 3 isomers of hexachlorocyclohexane (HCHs) (α-HCH, β-HCH, and γ-HCH), 4 dichlorodiphenyltrichloroethanes (DDTs) (p, p’-DDT and its metabolites p, p’-DDD (1,1-dichloro-2,2-bis(p-chlorophenyl)ethane) and p, p’-DDE (1,1-dichloro-2,2-bis(4-chorophenyl)ethylene), and o, p’-DDT), and methoxychlor, aiming to survey the residue levels and compositions of these 14 OCPs, to identify possible sources of the OCPs, and to assess their potential risks to human health and the environment in surface soils of Ürümqi. The concentrations ranged from non-detected to 30.86 μg kg^-1 for HCHs (sum of α-, β-, and γ-HCH), from non-detected to 40.03 μg kg^-1 for DDTs (sum of p, p’-DDT, p, p’-DDD, p, p’-DDE, and o, p’-DDT), and from non-detected to 11.95 μg kg^-1 for methoxychlor. The total concentrations of the OCPs ranged from 16.40 to 84.86 μg kg^-1, with a mean of 41.89 ± 16.25 μg kg^-1. According to the measured concentrations and occurrence rates of the 14 OCPs, DDTs, HCHs, and methoxychlor were the most dominant compounds. Among the 5 functional zones, the total concentration of OCPs was in the order of rural area > traffic roadside > park > business/residential area > industrial area. The different compositions of DDTs and HCHs indicated that the residues of these compounds in most soil samples originated from historical application, besides slight recent introduction at some sampling sites. The results of Pearson correlation analysis showed that soil total organic carbon played an important role in the residue levels of HCHs, but such relationships were not found with DDTs or other OCPs. The soil quality of Ürümqi was classified as Class I based on the guidelines of the Chinese Environmental Quality Standard for Soil (GB15618-1995), indicating that the residue levels of OCPs have little risks to the environment and human health in the study area.  相似文献