前进中的山东凯斯达机械制造有限公司

<正>2007年,在美丽的"孔孟桑梓之邦,文化发祥之地"的山东省济宁市,一个以振兴中国粮油机械为己任的企业——山东凯斯达机械制造有限公司悄然诞生,她是由济宁市机械设计研究院控股与自然人共同出资组建的有限责任公司,拥有"黄淮"和"CHEMSTA"两个品牌。公司自成立以来,深入贯彻科学发展观,适应现代化企业制度和国有企业深化改革的要求,勇于创     

E66型精梳机的技术特点与应用效果

为了提高精梳纱产品质量并减少万锭用工,介绍E66型精梳机主要的技术规格、性能特点及使用注意事项,与国产精梳机生产对比试验结果表明,在同等落棉率的情况下,无论是产能还是精梳质量E66型精梳机都优于国产精梳机。认为:运用C·A·P·D·500计算机辅助设计技术,可实现精梳机最高速度达500钳次/min,在保证落棉率不变的情况下大大提高精梳机的产能、精梳质量及成纱质量,减少用工,E66型精梳机代表国际先进的精梳技术。     

菱形蜂窝纸板的成型工艺

介绍了一种在实验室条件下制备菱形蜂窝纸板的工艺方法。采用丝网印刷的原理可完成菱形蜂窝芯的实验室制作,并根据当量密度相当原则推导出了菱形蜂窝纸芯的结构参数。提出了2种实现菱形蜂窝纸板工业化生产的解决方案。     

The label-free unambiguous detection and symbolic display of single nucleotide polymorphisms on DNA origami

Single nucleotide polymorphisms (SNPs) are the most common genetic variation in the human genome. Kinetic methods based on branch migration have proved successful for detecting SNPs because a mispair inhibits the progress of branch migration in the direction of the mispair. We have combined the effectiveness of kinetic methods with atomic force microscopy of DNA origami patterns to produce a direct visual readout of the target nucleotide contained in the probe sequence. The origami contains graphical representations of the four nucleotide alphabetic characters, A, T, G and C, and the symbol containing the test nucleotide identity vanishes in the presence of the probe. The system also works with pairs of probes, corresponding to heterozygous diploid genomes.     

Radiation tolerance of Cu/W multilayered nanocomposites

Magnetron sputtered Cu/W multilayer samples with individual layer thicknesses from 2.5 to 50 nm were irradiated by 50 keV He⁺ ions at ion fluences from 7 × 10²⁰ to 6 × 10²¹ m⁻² at room temperature. Evolution of the interfacial structure during irradiation is monitored by X-ray diffraction and cross-sectional transmission electron microscopy. Moreover, radiation responses on the individual layer thickness and He⁺ ion irradiation fluence are revealed. The highly morphological stability of the multilayered structure suggests that the interfacial structure and grain boundary can serve as sinks for radiation-induced defects.     

Cloud Variations under Subtropical High Conditions

T The cloud variations under subtropical high (STH) conditions during summers over a ten-year period are studied using combined data from the International Satellite Cloud Climatology Project and the National Centers for Environmental Prediction. The results reveal that clouds mainly experience an isolated evolution in the STHs, which is designated in this study by the 1540 gpm geopotential lines at 850 hPa. In the STH domain throughout the Northern Hemisphere, the average amount of total clouds exceeds 30%. Low clouds dominate in the STH domain, contributing over 60% of total cloud amount within the Pacific subtropical high and over 40% within the Atlantic subtropical high. The prevalence of low clouds in above regions is determined by the circulation pattern around 150°-180°E and 850 hPa, which suppresses both the upward development of the cloud tops and the water vapor divergences near the surface. Furthermore, clouds present great geographical incoherence within the STH domain. In the eastern STHs, the amount of middle and low clouds increases to peak in the early morning and decreases to a trough in the afternoon, while the amount of high clouds remains stable throughout the day. Conversely, in the western STHs, the diurnal amplitude of low and middle clouds is less than three, while high clouds dramatically reach the maximum in the afternoon and drop to the minimum in the evening. Among the nine cloud categories, stratocumulus clouds with greater optical thickness account for the most under STH conditions, no matter their occurrence or amount, causing more shortwave cloud radiative forcing to cool the local atmosphere and surface as a consequence.     

鹰嘴山金矿地下破碎采场回采工艺改进实践

为了安全、高效的开采鹰嘴山金矿宝贵矿产资源,首先对地下采场上盘坍塌原因进行了详细分析,在此基础上有针对性地开展了采矿方法及回采工艺研究工作.采用倾斜工作面框架结构干式充填采矿法取代普通干式充填采矿法,保证了回采作业的安全,提高了生产效率,降低了采矿损失和贫化.     

核苷酸对斑点叉尾鮰幼鱼生长、 体成分和胃肠道形态的影响

研究外源核苷酸——5’-腺苷酸、5’-尿苷酸二钠、5’-胞苷酸二钠、5’-鸟苷酸二钠和5’-肌苷酸二钠对斑点叉尾鮰幼鱼生长性能、体成分和胃肠道形态的影响。结果表明:基础饲料中添加外源核苷酸没有显著提高斑点叉尾鮰幼鱼的增重率和特定生长率,但显著改善了鱼体的干物质和粗蛋白质含量,同时对胃肠道形态的发育具有显著地促进作用,其中以0.10%核苷酸混合物添加水平较佳。     

Determination of trace aluminum in foods by stripping voltammetry

The study of electrochemical behavior of aluminum–cupferron complex indicated that aluminum and cupferron formed complex in 0.4 mol/L (NH₄)₂SO₄ solution. Accumulation potential of −0.95 V (vs. SCE) was applied, while the solution was stirred for 60 s. The response curve was recorded by scanning the potential to the negative direction and the peak current of −1.18 V (vs. SCE) was recorded. This complex absorbed in hanging mercury drop electrode (HMDE) and create a sensitive peak current. The peak current and concentration of aluminum accorded with linear relationship in the range of 4.0 × 10⁻⁸–2.0 × 10⁻⁹ g/mL. The relative standard deviation (at 10 μg/L) is 3.0% and the detection limit is 8 × 10⁻¹⁰ g/mL. The interference of some common ions was studied. This method has been used to determine trace aluminum in foods and water.     

不同保鲜处理对鲜湿米线品质及腐败样品微生物多样性的影响

本文监测了不同保鲜处理的鲜湿米线在25 ℃条件下贮藏后品质劣变、微生物生长的情况,并对腐败样品基于Illumina Miseq高通量测序进行微生物多样性分析。结果表明:对照组（CK）样品保质期仅为1 d,腐败后表面变黏,食用品质明显下降。酸浸单处理组（CA）、酸浸结合ε-聚赖氨酸盐酸盐处理组（PL）和酸浸结合水浴处理组（SY）则可分别将鲜湿米线保质期延长为2、4 d和13 d,其主要腐败特征为霉斑。16S rDNA结果表明CK组的优势腐败菌为泛菌（Pantoea）、鞘氨醇单胞菌（Sphingomonas）和芽孢杆菌（Bacillus）;不同保鲜处理明显降低了细菌群落多样性,其中CA组明显降低了鞘氨醇单胞菌和芽孢杆菌属的相对丰度,而PL组对此三种优势菌属均有较好的抑制作用。ITS rDNA结果发现CK组的优势真菌门为毛霉门（Mucoromycota）,优势真菌属为根霉属（Rhizopus）;保鲜处理后具有较强抗逆能力的子囊菌门（Ascomycota）成为优势菌门,且根霉属的相对丰度降低至0.1%以下。本研究结果为鲜湿米线保鲜技术的探索提供了理论基础。