简介:摘要:经田间种植试验结果表明,在种植的 15个展示品种当中,亩产理论上最高的是垦丰 17,公顷产量 1580.8kg,其次是垦豆 66,公顷产量 1452.5kg,第三是龙垦 334,公顷产量 1282.6kg,垦丰 16、绥农 42、黑农 84、垦豆 58、垦农 41的产量超过 1000kg,其余品种的产量均低于 1000kg,产量最低的是绥农 53,公顷产量 584.9kg。由于今年特殊的气候条件,总体上各大豆品种的产量均较低。
简介:AbstractObjective:To investigate the relationship between the concentration of L-carnitine in semen and sperm parameters and investigate the epigenetic profile in sperm cell after L-carnitine usage.Methods:From February 2017 to February 2018, 46 semen samples from asthenospermic males and 41 semen samples from healthy donors were acquired. Motility parameters were assessed using computer-assisted sperm analysis (CASA, n = 78) and the DNA fragmentation index (DFI) was evaluated through flow cytometry (n = 86), %DFI = % cells outside main population. Other oxidative stress markers, such as reactive oxygen species (ROS) levels (n = 86) and the mitochondria DNA copy numbers, were detected (n = 78). The concentration of L-carnitine and acetyl-L-carnitine was detected (n = 82), and methylation was analyzed (n = 30). After that, we collected 13 fresh semen samples from asthenospermic males and 23 fresh semen samples from healthy donors. These samples were used in a freeze-thaw model that was used to determine whether adding L-carnitine could change sperm progressive motility (n = 23), apoptosis index (n = 9), and methylation analysis (n = 7). In total, we have done 13 asthenospermia samples for Western blot, and except for the poor Western result, we analyzed 6 samples for H3K9ac detection, 7 samples for H3K9m3 and H3K27m3 detection, and immunofluorescence (n = 3). Finally, we had recruited 30 volunteers, and they were given oral administration of L-carnitine for 3 months and then collected semen samples at different time points for methylation analysis.Results:The concentration of acetyl-L-carnitine is negatively correlated with the %DFI value (r2 = 0.1090; P = 0.0026), and the concentration of acetyl-L-carnitine is positively correlated with sperm forward motility (r2 = 0.0543; P = 0.0458) and ROS (r2 = 0.1854; P < 0.0001), and the acetyl-L-carnitine level is negatively correlated with %DFI in asthenospermia (r2 = 0.1701; P = 0.0066), and the level of acetyl-L-carnitine in asthenospermic semen is significantly lower than the normal group (P = 0.0419). In addition, this study indicates that adding L-carnitine significantly improved sperm motility (P = 0.0325) and reduced sperm apoptosis (P = 0.0032). Importantly, Western blotting (P = 0.0429) and immunofluorescence staining results showed that the addition of L-carnitine reduced H3K9Me3 methylation level in sperm, respectively. Furthermore, semen samples from asthenospermic patients had reduced methylation levels in a specific region (16thP= 0.0003; 17thP= 0.0016) of the brain-derived neurotrophic factor (BDNF) promoter. The 16th methylation decreased with age (r2 = 0.1564; P = 0.0306), and the 17th methylation was decreased after treatment with L-carnitine for 28 days (P = 0.0341).Conclusion:L-carnitine can reduce the %DFI and also affect the methylation of the histone modification marker in sperm as a possible epigenetic regulator.
简介:【摘要】 梅钢 1780 热轧 L2 过程控制计算机系统是由上海宝信软件股份有限公司自主集成开发的, L2 过程控制计算机系统中的加热炉燃烧控制模型在计算板坯温度时需要使用到加热炉 DCS 系统中的一些数据,同时需要将模型计算的相关结果下发到 L1 加热炉 DCS 系统,这就需在 L2 过程控制计算机系统与 L1 加热炉 DCS 系统之间进行数据通讯。 本文 主要 介绍了 在上海宝信软件的 iPlature 平台下,利用其 iMultiLink 技术实现 L2 过程控制 计算机系统与 L1 加热炉 DCS 系统通讯的方法。
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简介:摘要:通过开展16个鲜食玉米品种示范对比试验,结果表明:综合性状和产量表现较好的品种有暄糯255、晶彩甜糯3号、亚航糯2号、蜜香甜糯265、晶甜糯323等。
简介:摘要地黄是一味常用的大宗药材,历代经典名方中常收录生地黄、干地黄、熟地黄、干熟地黄、生干地黄等多个品种。为理清经典名方中不同地黄炮制品的来源及品种演变关系,本文对历代本草著作进行了梳理。古今地黄均来源于玄参科植物地黄Rehmannia glutinosa Libosch.;天目地黄R. chingii Li曾作为地方品种。南北朝时期地黄已有栽培,唐宋时期栽培技术成熟;河南怀庆府自明代被认为是地黄的道地产区。《神农本草经》所载"干地黄"包括了今天的生地黄和熟地黄;《名医别录》将"生地黄"和"干地黄"相应分条描述,此时所载的生地黄为今之鲜地黄;宋代《本草图经》将"生地黄"与"熟地黄"相应描述,所载生地黄与今之生地黄相近,生地黄在宋代发生了含义的转变;"熟地黄"在秦汉时期的药方中已有记载,宋代单列并独立描述,明代熟地黄的加工方法多样,近代熟地黄加工方式趋于简化。"生干地黄"与"干熟地黄"在本草中独立成条见于明代本草,分别为今之生地黄和熟地黄,两者名称现今基本不用。通过梳理,为经典名方中地黄类药材的基原及加工提供本草学依据。