基于LabVIEW的增压器生产线数据采集和监控系统设计

课题组在LabVIEW软件开发平台下,结合RFID技术和PLC控制,开发出了一套针对增压器生产的数据采集和监控系统.研究结果:1)该系统通过深入对LabVIEW和三菱PLC的通信交互,基于以太网MXComponent控件,实现了对PLC寄存器的批量读写功能,可以高效地打通上位机和下位机间的数据交互,提升了设备运行效率;...     

厚朴播种育苗密度

本文分析了厚朴苗木留苗密度与地径、苗高、根系和叶面积等苗木主要生长因子的相关关系,认为厚朴播种育苗的最佳留苗密度为25.7万株/hm-2。     

葡萄果实生长发育中形态组织结构及生理变化

综述了葡萄果实生长发育过程中,果实的生长周期,果实各部分组织细胞的分裂、伸长等组织结构的变化,以及伴随这些过程果实内干物质含量、激素活性等的变化,揭示了葡萄果实生长发育中的组织形态学特点及生理学特点。     

黄花美冠兰的核型分析

采用压片法研究黄花美冠兰[Eulophia flava(Lindley)Hpoker f.]的染色体数目和核型。结果表明:黄花美冠兰的染色体数目2 n=54,染色体基数为X=27,核型公式为2 n=2 x=54=28 m+18 sm+8 st。主要由中部和近中部着丝点染色体组成。核型分类为2B型。     

Molecular mapping of QTLs for gluten strength as measured by sedimentation volume and mixograph in durum wheat (Triticum turgidum L. ssp durum)

Quantitative trait loci (QTLs) responsible for gluten strength measured by SDS-sedimentation volume (SV), mixograph and grain protein content (GPC) were located on the molecular linkage map of a durum wheat recombinant inbred line population. QSv.macs-1B.1 flanked by Xgwm550–Glu-B3 was the most consistent QTL for SV identified in all the environments. The same QTL was also associated with mixograph peak energy, peak time and total energy. The Glu-B1 locus was at the center of another QTL responsible for SV, while, Glu-B2 influenced SV as well as mixograph peak energy and peak time. Apart from glutenin coding loci, QTLs influencing mixing parameters and GPC were located in three other marker intervals Xwmc48.2–Xpsp3030 (4B), Xgwm573–Xbarc231.1 (7A) and Xgwm46–Xgwm540.1 (7B). A total of 26 main effect QTLs and 10 digenic epistatic interactions (QQ) for quality traits were distributed over 11 chromosomes. Out of these, seven main effect QTLs and three QQ interactions were involved in interactions with environments (QE, QQE). The results indicated that along with chromosome 1B, chromosomes 4B, 7A and 7B are also important for improvement of gluten strength and GPC in durum wheat.     

优质、高产杂交稻新组合泸优5648特征特性及栽培技术

泸优5648系福建省南平市农科所用泸香90A与自选恢复系南恢5648配组选育而成的优质、高产的杂交稻新组合,具有广泛的推广潜力和应用价值.该组合2003年参加品比试验和多点试种,同年在福建省第二届优质稻品种(组合)招标评选中中标;2004年参加福建省中稻优质组区试,表现突出,2005年续试与生产试验同步进行,2006年通过福建省农作物品种审定委员会审定(闽审稻2006015).     

Lipids in Wheat Flour Streams

Lipids play an important role in determining the quality of wheat flour and its suitability for different bakery products. The lipid content and fatty acid composition in various flour streams showed a wide variation. The free lipid content varied from 0·1 to 1·9% (db) and bound lipid content from 0·2 to 2·1% (db) in different flour streams. The amount of bound lipid was more in reduction streams. The palmitic and linoleic acids were the predominant fatty acids present in free and bound lipids. These fatty acids were found to be higher in the «III» «Break coarse», «IV» «Break filter», «III» «Break fine», «1st» and «4th» «middling». The studies showed that the reduction passage flours had more of bound lipids indicating the presence of polar lipids.     

Diurnal, daily, seasonal and annual patterns of sap-flux-scaled transpiration from an Acacia mangium plantation in South China

? In this study of a 19-year-old Acacia mangium plantation with a basal area of 26.6 m² ha^?1 in subtropical South China, whole tree sap flow was measured continuously over a two-year period and the dependence of stand sap flow (Et) on environmental factors was investigated at diurnal (hourly), daily, seasonal and annual scales.

? Daytime hourly mean Et was linearly correlated to photosynthetically active radiation (Q) and vapor pressure deficit (D) in each season during the whole study period (R ² > 0.57, P < 0.001), whereas daily daytime mean Et was less tightly coupled to Q and D (R ² < 0.50).

? Pronounced hysteresis was observed between Et and Q as well as D and the extent of the hysteresis varied seasonally.

? Total annual stand transpiration was higher in the first year (244.5 mm) than in the second year (185.8 mm) although rainfall was lower in the first year (1 122.4 mm) than in the second year (1 342.5 mm), from which it can be concluded that annual stand transpiration did not simply increase with increased annual rainfall.

     

Nocturnal sap flow characteristics and stem water recharge of Acacia mangium

In this paper, we studied the nocturnal stem water recharge of Acacia mangium. It is helpful to improve the precision of canopy transpiration estimation and canopy stomatal conductance, and to further understand the lag time of canopy transpiration to stem sap flow. In this study, the whole-tree sap flow in an A. mangium forest was measured by using Granier’s thermal dissipation probe for over two years in the hilly land of South China. The environmental factors, including relative humidity (RH), precipitation, vapor pressure deficit (VPD), photosynthetically active radiation (PAR), and air temperature (T _a) were recorded simultaneously. The stem water recharge of A. mangium was analyzed on both daily and monthly scales. Sap flux density was lower at night than during the day. The time range of nighttime sap flux density was longer in the dry season than in the wet season. The water recharging mainly occurred from sunset to midnight. No significant differences were observed among inter-annual nighttime water recharges. Nighttime water recharge had no significant correlation with environmental factors, but was well correlated with the diameter at breast height, tree height, and crown size. In the dry season the contribution of nighttime water recharge to total transpiration had significant correlations with daytime transpiration, total transpiration, VPD, PAR and T _a, while in the wet season it was significantly correlated with daily transpiration and total transpiration. __________ Translated from Chinese Journal of Ecology, 2007, 26(4): 476–482 [译自: 生态学杂志]     

Antibacterial activity of turmeric oil: a byproduct from curcumin manufacture.

Curcumin, the yellow color pigment of turmeric, is produced industrially from turmeric oleoresin. The mother liquor after isolation of curcumin from oleoresin contains approximately 40% oil. The oil was extracted from the mother liquor using hexane at 60 degrees C, and the hexane extract was separated into three fractions using silica gel column chromatography. These fractions were tested for antibacterial activity by pour plate method against Bacillus cereus, Bacillus coagulans, Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. Fraction II eluted with 5% ethyl acetate in hexane was found to be most active fraction. The turmeric oil, fraction I, and fraction II were analyzed by GC and GC-MS. ar-Turmerone, turmerone, and curlone were found to be the major compounds present in these fractions along with other oxygenated compounds.