排序方式： 共有24条查询结果，搜索用时 312 毫秒
1.
2020年10月,宁夏盐池县、利通区、平罗县发生输入性牛结节性皮肤病疫情。为查明疫情发生原因,分析疫情扩散风险,宁夏回族自治区农业农村厅畜牧兽医局组织成立督导组进行流行病学调查。通过现场调查、座谈及实验室检测,综合发病、溯源和追踪情况以及实验室检测结果,分析认为此次疫情是由调入纯种荷斯坦育成奶牛引起的。因及时采取了封锁疫点、控制移动、扑杀、无害化处理、清洗消毒、杀灭蚊蝇、免疫等综合处置措施,疫情扩散风险较低。此次疫情警示,要强化牛只及其产品的调运监管,加强疫情排查监测,及时发现和处置疫情。 相似文献
2.
3.
牛结节性皮肤病（LSD）是由牛结节性皮肤病病毒（LSDV）引起的一种牛急性、亚急性全身感染的病毒性传染病。在全球多数地区有流行发病史,并呈逐年扩增趋势。作为一种近几年新传入我国的病毒性传染病,受气候环境因素影响,有明显季节性,多发于高温潮湿季节。该病传播途径多元化,农产品往来、动物贸易流动、野生动物流窜迁徙、饲料调运、患病牛精液配种等均可导致病毒传播,引发牛出现以皮肤硬状结节为主要特征的临床症状,传染性强,易造成大面积传播,对养牛业产生极大的危害性,严重制约牛产业有序健康发展。为更好地认识和了解该病毒的特性,本文整理了牛结节性皮肤病的全球流行史,通过流行病学分析,综合阐述了发病临床特征,并根据不同的诊断方法,提出了有针对性的预防控制措施,以期为预防该病发生和建立综合性的生物安全防控体系提供帮助,从而确保牛群健康,提高养殖效益。 相似文献
4.
Wheat flour replacement from 0 to 40% by single tef flours from three Ethiopian varieties DZ-01-99 (brown grain tef), DZ-Cr-37 (white grain tef) and DZ-Cr-387 (Quncho, white grain tef) yielded a technologically viable ciabatta type composite bread with acceptable sensory properties and enhanced nutritional value, as compared to 100% refined wheat flour. Incorporation of tef flour from 30% to 40% imparted discreet negative effects in terms of decreased loaf volume and crumb resilience, and increase of crumb hardness in brown tef blended breads. Increment of crumb hardness on aging was in general much lower in tef blended breads compared to wheat bread counterparts, revealing slower firming kinetics, especially for brown tef blended breads. Blended breads with 40% white tef exhibited similar extent and variable rate of retrogradation kinetics along storage, while brown tef-blended breads retrograded slower but in higher extent than control wheat flour breads. Breads that contains 40% tef grain flour were found to contain five folds (DZ-01-99, DZ-Cr-387) to 10 folds (DZ-Cr-37) Fe, three folds Mn, twice Cu, Zn and Mg, and 1.5 times Ca, K, and P contents as compared to the contents found in 100% refined wheat grain flour breads. In addition, suitable dietary trends for lower rapidly digestible starch and starch digestion rate index were met from tef grain flour fortified breads. 相似文献
5.
This study aims to determine the authenticity of the geographical origin of rice using inductively coupled plasma atomic emission spectroscopy (ICP-AES) and chemometrics. The profiles of 25 elements in brown rice measured by ICP-AES were subjected to data-mining processes, including principal component analysis (PCA) and partial least-squares discriminant analysis (PLS-DA). PLS-DA clearly discriminated the geographical origin of rice samples grown in three countries. Eleven elements (Cu, Ag, Zn, Cr, Ca, Ba, Cd, Bi, K, Pb, and In) significantly contributed to the ability to discriminate the geographical origin of the rice. These results demonstrate the use of multielement profiling combined with chemometrics as a tool for discriminating food origins. This study extends our knowledge about the applications of both multielement profiling and chemometrics for the determination of food authenticity, and thus can be useful for controlling the geographical origin of rice by governmental administration and protecting consumers from improper domestic labeling. 相似文献
6.
Rheum palmatum Linn has been widely applied in the clinical treatment of diabetes mellitus. It has been found that emodin as the major bioactive component of R. palmatum L exhibits the competency to activate peroxisomal proliferator-activated receptor-γ (PPARγ) in vitro. So the aim of this study was to evaluate the anti-diabetic effects of emodin through the activation of PPARγ on high-fat diet-fed and low dose of streptozotocin (STZ)-induced diabetic mice. The diabetic mice were intraperitoneally injected with emodin for three weeks. No changes of food consumption and the body weight in emodin-treated mice were monitored daily during the entire experiment. At the end of experiment, the levels of blood glucose, triglyceride and total cholesterol in serum were significantly decreased after emodin treatment. However, serum high-density lipoprotein cholesterol (HDLc) concentration was significantly elevated. The glucose tolerance and insulin sensitivity in emodin-treated group were significantly improved. Furthermore, the results of quantitative RT-PCR analysis showed that emodin significantly elevated the mRNA expression level of PPARγ and regulated the mRNA expressions of LPL, FAT/CD36, resistin and FABPs (ap2) in liver and adipocyte tissues. No effects on the mRNA expressions of PPARα and PPARα-target genes were observed. Taken together, the results suggested that the activation of PPARγ and the modulation of metabolism-related genes were likely involved in the anti-diabetic effects of emodin. 相似文献
7.
对青橘味(A)、甜橙味(B)、西柚味(C)、柠檬味(D)4种柑橘类酸奶的整体喜好度、感官特性进行评价。其中整体喜好度采用非参数Friedman检验和多重比较中的最小显著差数法(LSD),感官特性选择10个描述风味酸奶的感官描述词进行定量描述分析法(QDA)评价,同时采用偏相关性分析整体喜好度与感官特性关系。结果显示4种产品的整体喜好度评分排序为:C>B>A>D,即评价员最喜欢的是西柚味酸奶,其次是甜橙味酸奶、青橘味酸奶,最不喜欢的是柠檬味酸奶。在5%显著性水平上,C样品明显比A、D样品更受喜欢,B样品明显比D样品更受喜欢。将4种样品分为4组,通过QDA法分析,4种风味酸奶的感官特性各有特色。整体喜好度及感官特性的相关性结果显示,评价员喜欢总香气、奶香气、发酵味、果香气稍强,甜味稍强,稠厚,无苦味的产品,对带有涩感和有颗粒感的样品的喜好度不一致,对香气太强或太弱、稠厚度太强、酸味太弱的产品的喜好度有所下降。 相似文献
8.
采用时间和空间序列相结合的方法,对延安研究区的植物群落动态变化及其演替规律观测研究的基础上,完善了前人对此区植物群落演替序列;遵循植物群落演替规律开展植被分步恢复试验,结果表明:在不破坏现有植被的条件下,分步恢复可使当年甘肃鼢鼠危害率减少30%~40%,油松造林保存率提高50%左右,方差分析显示油松和侧柏苗木的高生长和分枝数明显优于一步到位法在退耕地建造的针叶苗木;且在75%覆盖率的灌丛中,油松苗单株抽条长度和单株抽条个数分别是退耕地油松苗木的2.31和2.24倍,生长状况最好。 相似文献
9.
Johannes F.J. Max Walter J. Horst Urbanus N. Mutwiwa Hans-Jürgen Tantau 《Scientia Horticulturae》2009
A tomato (Solanum lycopersicum L.) crop was grown in four greenhouses during the dry season 2005/06 in Central Thailand. Sidewalls and roof vents of two greenhouses were covered with nets and these greenhouses were mechanically ventilated when air temperature exceeded 30 °C (NET). The other two greenhouses were covered with polyethylene film and equipped with a fan and pad cooling system (EVAP). Overall mean air temperature was significantly reduced by 2.6 and 3.2 °C (day) and 1.2 and 2.3 °C (night) in EVAP as compared to NET and outside air, respectively. Temperature maxima in EVAP averaged about 4 °C lower than in NET and outside. The relative humidity was around 20 and 30% (day) and 10 and 15% (night) higher in EVAP than in NET or outside, respectively. Vapour pressure deficit averaged 0.25 kPa in EVAP, 1.03 kPa in NET and 1.48 kPa outside. The crop water-consumption was significantly lower in EVAP (1.2) than in NET (1.8 L plant−1 day−1), which is ascribed to reduced transpiration in EVAP. Total fruit yield was similar in NET (6.4 kg plant−1) and EVAP (6.3 kg plant−1). The quantity of undersized (mostly parthenocarpic) and blossom-end rot (BER)-affected fruits was reduced in EVAP. However, the proportion of marketable yield was significantly higher in NET (4.5 kg plant−1) than in EVAP (3.8 kg plant−1), owing largely to an increased incidence of fruit cracking (FC) in EVAP. Higher FC but lower BER incidence coincided with higher fresh weight and Ca concentration in the fruits in EVAP. It is concluded that in regions with high atmospheric relative humidity evaporative cooling without technical modifications allowing dehumidification will not improve protected tomato production. 相似文献
10.
《Journal of Cereal Science》2014,59(3):424-430
The influence of high molecular weight glutenin subunits (HMW-GS) on wheat breadmaking quality has been extensively studied but the effect of different Glu-1 alleles on cookie quality is still poorly understood. This study was conducted to analyze the effect of HMW-GS composition and wheat-rye translocations on physicochemical flour properties and cookie quality of soft wheat flours. Alleles encoded at Glu-A1, Glu-B1 and Glu-D1 locus had a significant effect over physicochemical flour properties and solvent retention capacity (SRC) profile. The null allele for Glu-A1 locus presented the highest cookie factor observed (CF = 7.10), whereas 1BL/1RS and 1AL/1RS rye translocations had a negative influence on CF. The three cultivars that showed the highest CF (19, 44 and 47) had the following combination: Glu-A1 = null, Glu-B1 = 7 + 8, Glu-D1 = 2 + 12 and no secalins. Two prediction equations were developed to estimate soft wheat CF: one using the HMW-GS composition and the other using physicochemical flour parameters, where SRCsuc, SRC carb, water-soluble pentosans, damaged starch and protein turned out to be better CF predictors. This data suggests that grain protein allelic composition and physicochemical flour properties can be useful tools in breeding programs to select soft wheat of good cookie making quality. 相似文献