施用微肥对苏丹草新品系农艺性状和种子产量的影响

为了了解不同微肥对苏丹草新品系营养生长和种子产量的影响,采用随机田间小区试验的研究方法,比较处理和对照间差异显著性。结果表明:钼具有促使苏丹草提前出苗的作用,与对照比,其全生育期相应缩短了10 d。镁、锌、钼均具有一定使叶宽度增加的作用,3个处理间的差异显著(P0.05),锌和钼的作用相当,它们比镁的作用强。镁和锌均能促使茎粗有所增加,且处理与对照间差异显著(P0.05)。施镁、锌、钼均使种子产量有所增加,处理间与对照比均为差异显著(P0.05),锌和钼的作用均比镁明显。本研究表明在播种时施入适量含锌和钼元素的微肥对苏丹草茎粗、叶宽及种子产量的增加均具有一定的促进作用。     

苏丹草和草木樨混贮发酵品质研究

本文进行了苏丹草和草木樨混贮对发酵品质、营养成分及消化性的影响的试验研究.研究结果表明,苏丹草与草木樨混贮的pH值略高于苏丹草单贮,且其pH值达到了优质青贮标准.混贮的乳酸含量比苏丹草单贮明显下降(P＜0.01).混贮的粗蛋白含量较苏丹草单贮显著增加(P＜0.05),而中性洗涤纤维和酸性洗涤纤维含量均显著减少(P＜0.05),混贮干物质消化率显著高于苏丹草单贮的消化率,达到79.7％.混贮的综合试验结果表明,混贮可以得到优良的青贮饲料,且可以解决豆科牧草青贮发酵难处.     

冬小麦与苏丹草不同种植方式下产量效益比较研究

通过在新疆奇台县和吉木莎尔县进行冬小麦单播、苏丹草单播、冬小麦与苏丹草套种、冬小麦复播玉米、复播豌豆以及大麦与苏丹草混播试验示范,冬小麦（Triticum aestivum）、大麦（Hordeum vulgare）与苏丹草（Sorghum sudanense）套种、混播,不影响冬小麦、大麦的产量,苏丹草干草产量可达到15000kg／ha。冬小麦套种苏丹草效益明显优于其它播种方式。在昌吉州乃至新疆大部分地区都可推广种植。冬小麦套种苏丹草比冬小麦复播玉米、复播豌豆效益明显。套播苏丹草较复播豌豆效益增加31．3％．套播苏丹草较复播玉米效益增加16．1％,大麦、苏丹草混播较单播大麦效益增加61．2％。冬小麦套种苏丹草技术解决了种粮与种草之间争地的矛盾。为促进畜牧业快速健康发展探索出了新的途径。     

磁化水灌溉对紫花苜蓿生长及产量的影响

【目的】为了研究灌溉磁化水对豆科牧草的影响。【方法】在地下滴灌设施上增设强磁处理装置,并控制灌水次数和灌水量进行试验,研究磁化水灌溉处理对紫花苜蓿(Medicago sativa L.)生长及产量的影响。【结果】取样结果表明前中期及全程灌溉磁化水,紫花苜蓿株高、叶面积及根系生物量较对照CK显著增加,全年收获三茬草产量较对照CK亦有显著差异,其中前期、中期、后期及全程磁化水灌溉处理年产草量较对照分别增加9.58%,5.35%,1.13%,10.39%。灌溉磁化水的不同处理紫花苜蓿根系结瘤数较对照组CK降低,【结论】说明磁化水灌溉对紫花苜蓿有增产作用,但对紫花苜蓿根系固氮有不利影响。     

“新引1号东方山羊豆”新品系种植效果观察

以主推品种"新引1号东方山羊豆"新品系为例,介绍了新疆博乐市引进种植"新引1号东方山羊豆"新品系的优良特性。从整地、播种、施肥、灌溉、中耕除草、病虫害防治和茎叶刈割等方面总结了"新引1号东方山羊豆"新品系在博乐市高产栽培技术,并分析种植效益,为促进"新引1号东方山羊豆"新品系在当地的推广栽培提供了参考。     

液相色谱-串联质谱法测定红花中非法染色物新品红、金胺O和苏丹红Ⅳ含量的研究

目的 建立液相色谱-串联质谱(LC-MS/MS)法同时测定红花中非法染色物新品红、金胺0和苏丹红Ⅳ的含量.方法 采用安捷伦EC-C18(2.1 mm ×50mm,1.8 μm)色谱柱,流动相为20 mmol/L甲酸铵+0.1％甲酸(A)和乙腈(B),梯度洗脱,流速为0.2 ml/min,柱温为40℃,离子化方式为ESI,检测模式为MRM,选择离子对:(1)新品红m/z 330.3→223.2,m/z330.3→300.2;(2)金胺O m/z 268.2→147.2,m/z 268.2→252.2;(3)苏丹红Ⅳm/z 381.2→224.1,m/z 381.2→91.1.结果 该方法新品红、金胺O和苏丹红Ⅳ的线性范围分别为0.1086 ～ 271.50 ng/ml、0.1392 ～ 348.00 ng/ml和0.1352 ～338.00 ng/ml,回收率(n=6)分别为97.45％、96.44％和97.58％,RSD分别为0.70％、1.12％和0.89％,精密度、稳定性和重复性的RSD均小于3％.结论 该方法提取简单,测定方法定量准确,灵敏度高,适用于红花中非法染色物新品红、金胺O和苏丹红Ⅳ的含量测定.     

苏丹草种植及种子生产技术研究

在准噶尔盆地西北缘古玛纳斯湖湖积平原区新拓恳荒地中，对苏丹草种植及种子生产技术进行了初步研究，结果表明，最佳播种时间为5月10前后，在一定的播种范围内，播种量对苏丹草干草及种子产量影响不大，种植行距对干草产量、质量及种子产量有显著影响，最佳种植行距为30cm，对于收获季节多风的荒漠平原区，在保护措施不利的情况下，不宜大规模进行苏丹草种子生产。     

优良豆科牧草引种对比试验研究

本文通过在新疆塔城市灌溉条件下,2007-2009连续三年对阿尔冈金苜蓿、和田苜蓿、红豆草、小冠花和百脉根5种豆科牧草的生产性能进行了观测研究。结果表明,各牧草一般于4月份返青,7月中旬至8月初种子成熟,生育天数110～150d。最后一次刈割后再生草大部分于10月枯黄,生长天数150～180d。干草产量排序为：阿尔冈金...     

红豆草生产试验总结报告

2005-2007年在奇台草原站基地进行了几种红豆草的试验研究,其中包括奇台红豆草、昭苏红豆草、ck-甘肃红豆草生产试验研究.结果表明:奇台红豆草产草量和产籽量均居首位,属抗旱丰产型品种.本文总结了栽培管理技术要点.     

含有人工放射性核素的水灌溉栽培蔬菜和马铃薯的放射卫生学评价

核能事业的迅速发展,导致核燃料水(浓集人工及天燃放射性核素)量的增加,在利用核电站冷却水灌溉时,可能有放射性核素转移入农作物内.因此,评价居住在原子能发电站邻近区居民总吸收剂量时,必须考虑居民对蔬菜和马铃薯的消费.灌溉试验表明,不同的灌溉方式,放射性核素转移系数不同.人工降雨方式灌溉时,水中放射性核素经蔬菜和马铃薯向居民体内转移比犁沟方式灌溉更为强烈,经蔬菜前者高于后者2～15倍,经马     

不同类型青贮玉米品种产量与农艺性状的相关性分析

对16个不同类型青贮玉米品种(组合)生物产量与农艺性状进行相关性分析,结果表明:不同类型青贮玉米品种生物产量与主要农艺性状存在着不同程度的相关性.生物产量与株高(r=.5534*)、茎粗(r=0.6662*)和株数(r=0.5789*)的相关性达到显著水平,与分蘖高(r=-0.8137**)、分蘖穗位高(-0.7293...     

皖系长毛兔微卫星标记多态性及其与产毛量相关的研究

本研究利用微卫星标记技术,分析了4个微卫星座位多态性与皖系长毛兔1岁时的产毛量之间关系。结果表明:皖系长毛兔4个微卫星座位上平均检测到4.5(3~6)个等位基因,平均杂合度为0.680(0.630~0.721),平均多态信息含量为0.642(0.559~0.705)。Sol33微卫星座位与1岁时产毛量呈显著相关(P<0.05),其中基因型为AD和BD个体1岁时产毛量与其他3种基因型个体间均存在显著差异(P<0.05)。其他座位Sat4、Sat13和Sol44与皖系长毛兔1岁时产毛量相关不显著(P>0.05)。     

Yield of head CT for acute findings in patients presenting to the emergency department

ObjectivesThe aim of our study was to evaluate the yield of head CT in the ED in different age groups and different referral indications.Patients and methodsRecords of one large academic tertiary care ED were retrospectively reviewed for consecutive adult patients who underwent a head CT between January 1st 2017 and February 10th 2017. CT referral forms and interpretations were obtained and evaluated for demographics, referral indications, and findings.Scans were divided into three groups: acute findings, chronic findings, and normal. The cohort was divided into three age groups. Associations between referral indications and acute findings were calculated.ResultsOverall, 1536 of adult patients with ED head CT were included. Acute findings were found in 239/1536 (15.5%) of the CTs. The frequency of acute findings increased with age (p = 0.027). The most common acute findings were brain hemorrhage (32.6%), infarct (27.6%), and mass (23%). The top three referral indications were focal neurologic deficit (28%), trauma (24.7%), and headache (17.5%).The rates of positive acute findings for different referral indications were seizure 27%, confusion 20%, syncope 19%, focal neurologic deficit 16%, head injury 15%, headache 12%, and dizziness 8%.ConclusionThis study shows the yield of ED head CT for acute findings for different age groups and for different referral indications. The frequency of acute findings increased with age. Suspected seizure had the highest association with an acute finding, whereas dizziness had the lowest association.     

CT引导下经皮骨肿瘤穿刺活检术诊断率的相关因素分析

目的：探讨CT引导下经皮穿刺活检在骨肿瘤诊断中的价值,分析病变及技术因素对穿刺活检诊断率的影响。方法：2005年9月-2009年3月在CT引导下经皮活检的82例骨肿瘤。分析病变类型（硬化性、溶骨性）,病变大小（〈2 cm,2-4 cm,〉4 cm）,活检针的类型（14G、18G、20G）及标本组织长度（〈1.0 cm、1.0-1.5 cm,〉1.5 cm）对穿刺活检诊断率的影响。结果：68例经穿刺得到确切病理结果,诊断率为82.93%（68/82）,硬化性和溶骨型病变的诊断率分别是60.00%和88.06%。病灶大小〈2 cm、2-4 cm和〉4 cm的诊断率分别是58.33%、79.31%和92.68%。活检针类型14、18和20G的诊断率分别是72.73%、83.33%和85.11%。标本组织长度〈1 cm、1-2 cm、〉2 cm的诊断率分别是46.15%、64.58%和85.71%。所有病例均未发生严重并发症。结论：CT引导下经皮穿刺活检是诊断骨肿瘤的一种安全、准确、快捷、可靠的重要检查方法,在溶骨性病变、较大病变及较长标本组织中的诊断率高。     

Higher Imaging Yield When Clinical Decision Support Is Used

ObjectiveIncreased utilization of CT pulmonary angiography (CTPA) for the evaluation of pulmonary embolism has been associated with decreasing diagnostic yields and rising concerns about the harms of unnecessary testing. The objective of this study was to determine whether clinical decision support (CDS) use would be associated with increased imaging yields after controlling for selection bias.MethodsWe performed a retrospective cohort study in the emergency departments of two tertiary care hospitals of all CTPAs performed between August 2015 and September 2018. Providers ordering a CTPA are routed to an optional CDS tool, which allows them to use Wells’ Criteria for pulmonary embolism. After propensity score matching, CTPA yield was calculated for the CDS-use and CDS-dismissal groups and stratified by provider type.ResultsA total of 7,367 CTPAs were ordered during the study period. Of those, providers used the CDS tool in 2,568 (35%) cases and did not use the tool in 4,799 (65%) of cases. After propensity score matching, CTPA yield was 11.99% in the CDS-use group and 8.70% in the CDS-dismissal group (P < .001). Attending physicians, residents, and physician assistant CDS users demonstrated a 56.5% (P = .006), 38.7% (P = .01), and 16.7% (P = .03) increased yield compared with those who dismissed the tool, respectively.DiscussionDiagnostic yield was 38% higher for CTPAs when the provider used the CDS tool, after controlling for selection bias. Yields were higher for every provider type. Further research is needed to discover successful strategies to increase provider use of these important tools.     

Comparison of three irrigation methods: SWEEPS,ultrasonic, and traditional irrigation,in smear layer and debris removal abilities in the root canal,beyond the fractured instrument.

Background. :This study compared the effectiveness of three irrigation methods in removing smear layer and debris in the presence of the fractured instrument. The three compared irrigation methods were conventional syringe irrigation, passive ultrasonic irrigation, and SWEEPS (Shock wave enhanced emission photoacoustic streaming) irrigation.Methods and materials: Sixty-three permanent mandibular molars with moderate curvature were included in this experimental study. Mesiobuccal root canals were prepared with Race files (FKG Dentaire. Switzerland) up to #25, 4%. A #30, 6% Race file was used to simulate file fracture 3 mm short of working length. The prepared samples, randomly divided into three groups, and final irrigation was separately done in each group. Group 1 conventional syringe irrigation (CSI) as the control group, Group 2 passive ultrasonic irrigation (PUI), and Group 3 Shock wave enhanced emission photoacoustic streaming or SWEEPS Irrigation (SI). Smear layer and debris removal beyond separated file scored with scanning electron microscope(SEM) images. Data were analyzed using the nonparametric tests to compare the smear layer and debris scores.Result: SWEEPS and passive ultrasonic irrigation significantly removed smear layer and debris, better than conventional syringe irrigation (p<0.001). The smear layer and debris removal efficiency between passive ultrasonic Irrigation and SWEEPS were not significantly different (p = 0.629).Conclusion: In the face of the irretrievably broken instrument in the root canal, passive ultrasonic irrigation and the SWEEPS method can enhance smear layer and debris removal compared to conventional syringe irrigation.     

Study of Dose-rate and Split-dose Effects on the in Vitro Micronucleus Yield in Human Lymphocytes Exposed to X-rays

This paper reports the effects of changes in dose-rate and dose-fractionation on the micronucleus (MN) yield in human lymphocytes exposed to 250 kV X-rays. For the investigation of dose-rate effects whole blood samples of four healthy donors were irradiated with doses ranging from 1 to 4 Gy given at various dose-rates between 0·2 and 40 Gy/h. For the higher doses (3 and 4 Gy) a decline in the MN yield became apparent when the dose-rate was reduced below 1·6 Gy/h. This effect was enhanced systematically by a further lowering of the dose-rate. For lower doses (1 and 2 Gy) the reduction in the MN yield was less pronounced: only a small effect was observed for two donors when a dose of 2 Gy was administered at a dose-rate of 0·2 Gy/h. In the split-dose experiment a dose of 4 Gy was delivered either as a single exposure or in two fractions of 2 Gy, separated by time intervals ranging from 30 min to 10 h. A continuous decrease of the MN yield with increasing interfraction time is observed: after an initial fast decline a further slight reduction in the MN yield occurs. The observed dose-rate and split-dose effects on the MN yield can be attributed to repair of sublethal damage.     

Diagnostic Yield of Diffusion-Weighted Brain Magnetic Resonance Imaging in Patients with Transient Global Amnesia: A Systematic Review and Meta-Analysis

ObjectiveTo investigate the diagnostic yield of diffusion-weighted imaging (DWI) in patients with transient global amnesia (TGA) and identify significant parameters affecting diagnostic yield.Materials and MethodsA systematic literature search of the MEDLINE and EMBASE databases was conducted to identify studies that assessed the diagnostic yield of DWI in patients with TGA. The pooled diagnostic yield of DWI in patients with TGA was calculated using the DerSimonian-Laird random-effects model. Subgroup analyses were also performed of slice thickness, magnetic field strength, and interval between symptom onset and DWI.ResultsTwenty-two original articles (1732 patients) were included. The pooled incidence of right, left, and bilateral hippocampal lesions was 37% (95% confidence interval [CI], 30–44%), 42% (95% CI, 39–46%), and 25% (95% CI, 20–30%) of all lesions, respectively. The pooled diagnostic yield of DWI in patients with TGA was 39% (95% CI, 27–52%). The Higgins I² statistic showed significant heterogeneity (I² = 95%). DWI with a slice thickness ≤ 3 mm showed a higher diagnostic yield than DWI with a slice thickness > 3 mm (pooled diagnostic yield: 63% [95% CI, 53–72%] vs. 26% [95% CI, 16–40%], p < 0.01). DWI performed at an interval between 24 and 96 hours after symptom onset showed a higher diagnostic yield (68% [95% CI, 57–78%], p < 0.01) than DWI performed within 24 hours (16% [95% CI, 7–34%]) or later than 96 hours (15% [95% CI, 8–26%]). There was no difference in the diagnostic yield between DWI performed using 3T vs. 1.5T (pooled diagnostic yield, 31% [95% CI, 25–38%] vs. 24% [95% CI, 14–37%], p = 0.31).ConclusionThe pooled diagnostic yield of DWI in TGA patients was 39%. DWI obtained with a slice thickness ≤ 3 mm or an interval between symptom onset and DWI of > 24 to 96 hours could increase the diagnostic yield.     

Laser activated irrigation with SWEEPS modality reduces concentration of sodium hypochlorite in root canal irrigation

IntroductionShockwave enhanced emission photoacoustic streaming (SWEEPS) of Er: YAG laser has been proposed to improve the disinfecting efficacy of endodontic treatments. The purpose of this in vitro study was to compare the effects of different concentrations of sodium hypochlorite (NaOCl) combined with SWEEPS root canal irrigation on the removal of Enterococcus faecalis (E.faecalis) in infected bovine root canals.Materials and methodsForty-eight bovine root canals infected with E.faecalis were randomly divided into six groups. The root canals were irrigated by normal saline (NS) in combination with conventional needle irrigation (CI) , NS and different concentrations of NaOCl (0.5%, 1.0%, 2.0%, and 5.25%) in combination with SWEEPS. Then, the remaining live microbes from all specimens before and after root canal irrigation were collected and recovered via plate counting of the colony-forming unit (CFU). The CFU data were statistically analyzed by the Kruskal-Wallis H test.ResultsAfter root canal irrigation, the viable count in each group was significantly reduced (P < 0.05). The bacterial reduction in NS+CI and NS+SWEEPS groups was significantly lower than that in other groups (P < 0.05), and there was no significant difference among the other groups, or between these two groups (P > 0.05).ConclusionsThis study showed that SWEEPS used for root canal irrigation can enhance the effect of low-concentration NaOCl while ensuring the antimicrobial effect.     

荷斯坦牛乳房诸性状与305d产奶量的相关

对淮南地区荷斯坦牛体型线性性状与产奶量进行了相关分析,结果显示:荷斯坦牛后乳房高度与乳牛产奶量成强正相关(P<0.01)后乳房宽度与产奶量呈中等强度正相关(P<0.05),乳房深度与产奶量则呈显著负相关(P<0.05),乳静脉长度与产奶量呈显著正相关(P<0.05),而乳头长度与乳头直径在4胎前均与产奶量呈显著负相关(P<0.05),4胎后则呈弱负相关(P<0.05);后乳房高度、后乳房宽度及乳静脉长度是直接影响产奶量的重要性状。