海南岛香料植物名录

对海南岛香料植物进行了调查研究。采用哈钦松系统编制“海南岛香料植物名录”。该名录共包括香料植物329种,隶属64科,其中海南野生种191种,栽培种138种,基本囊括了分布于海南的香料植物。      

Knowledge Representation for Rotative Machine Fault Diagnosis Based on Semantic Net

Aiming at knowledge representation problem of expert system for rotary machinery fault diagnosis, semantic net knowledge representation is discussed. Semantic net to represent expert knowledge of rotary machinery fault diagnosis is explored. Its realizing method is afforded in computer language, in addition, demostrating model is also developed in Visual C++. The result shows good validity of the knowledge representation.     

木霉菌T38D对大豆根腐病菌的拮抗机制

利用从土壤中分离出的木霉(Trichoderma spp.)菌株T38D,通过对峙法、对扣培养和圆盘滤膜法对引起大豆根腐病的病菌进行了拮抗作用研究,结果表明:木霉菌T38D对根腐病菌有明显的空间竞争能力,对立枯丝核菌和终极腐霉菌的拮抗系数达到Ⅰ级,对4种镰孢菌的拮抗系数均达到Ⅱ级;木霉菌T38D可以寄生于4种根腐病菌菌丝上,最终导致病原菌解体死亡;T38D的难挥发性代谢产物对立枯丝核菌的抑制率可达100%,对终极腐霉菌的抑制率为87.6%,对燕麦镰孢菌的抑制率为75.2%,对其余3种镰孢菌的抑制率都在40%～50%;T38D的易挥发性代谢产物对立枯丝核菌和终极腐霉菌有一定的抑制效果,对镰孢菌的抑制效果不明显。     

发光杆菌NJ菌株的抑菌活性研究

测定了发光杆菌NJ菌株对16种植物病原真菌的抑菌活性,结果表明该细菌具有较广的抑菌谱,其中对甘蓝黑斑病菌、玉米大斑病菌、番茄猝倒病菌、玉米小斑病菌等植物病原真菌具有较强抑制作用。对该菌的发酵条件研究表明,该菌在种龄为24 h、接种量在4%～6%条件下,在TSY培养液中72 h即可获得较高的抑菌活性。而装瓶量为10～50 mL/100 mL锥形瓶,转速为120～200 r/min对菌的活性影响不大。不同温度处理发酵液,其抑菌活性发生变化,其中经60℃处理10 min后,抑菌活性降低约50%,说明发酵液中的抑菌活性成分可能有多种。     

胰岛素样生长因子-1的放射免疫测定方法的建立

胰岛素样生长因子－１（ＩＧＦ－１）分别与两种载体蛋白——牛血清白蛋白（ＢＳＡ）和卵清蛋白（ＯＡ）用戊二醛连接,经紫外分光光度仪扫描确定偶联成功。以ＩＧＦ－１－ＢＳＡ作为免疫原,皮内多点注射免疫青紫兰兔,制备ＩＧＦ－１抗体,经ＥＬＩＳＡ法测定,血清效价为１∶２０００,放免工作浓度为１∶１５０００。采用氯胺－Ｔ标记ＩＧＦ－１,用酸醇抽提法处理样品,去除ＩＧＦ－１结合蛋白。所建立的ＩＧＦ－１放免标准曲线,其最小检测量为０．０６ｎｇ／ｍＬ,批内误差为４．８％,批间误差为８．２％（ｎ＝１０）。     

玉米不同基因型种子发芽及幼苗性状分析

对Ｓ２２、４７８、４８９自交系及其单交、回交、自交后代共１６个基因型的种子发芽和幼苗特性研究表明：①Ｓ２２（深色）、Ｓ２２（中色）、及（Ｓ２２×４８９）自交和回交后代各项指标均较差,且物质运转率低;Ｓ２２（浅色）与４７８相比,发芽率较高,但发芽较慢。②单交种的种子发芽和幼苗特性均随着杂种优势的产生而显著提高,自交、回交后代又随杂种优势的衰退而明显降低。③种子发芽及幼苗特性与粒色有关,受母本胞质基因的影响。④Ｓ２２的种子发芽和出苗特性可以通过后代选择予以改良。     

播种时间对新疆阿拉尔垦区棉花生产的影响

在新疆生产建设兵团第一师农业科学研究所开展试验,对播期相差16 d的棉花生育进程及产量品质开展调查。结果表明,因温度优势,晚播棉花出苗快,出苗至现蕾生长进程加快,缩短了晚播造成的生育进程滞后时间;晚播棉花第一果枝节位比早播棉花低1,总果枝数与早播棉花的相同。晚播棉花现蕾至开花期的生育进程与早播棉花趋于一致,吐絮期比早播棉花晚7 d,播种至吐絮生育时间缩短9 d。晚播棉花在10月上旬收获的产量比早播棉花低9.8%,但差异不显著;10月下旬晚播棉花与早播棉花的产量基本相同。早播棉花纤维品质总体好于晚播棉花,其中长度整齐度指数和黄度差异显著。     

越野汽车机械自动变速器换挡规律的自适应控制

针对越野汽车载荷变化大、路况复杂而又要具有机动灵活的特点,利用自适应控制技术所建立的自适应控制器,对实际行车状况的油门、车速和冲击度进行在线估计。根据得到的实际的车辆负荷度,按照已经建立的最小和最大负荷度下的机械自动变速器换挡控制规律,通过线性插值法,建立适应实际行车状况的换挡规律,实现换挡规律的自适应控制。     

鄂东稻田油菜免耕飞播技术模式的产量及效益评价

为了探索稻田秸秆全量还田油菜免耕飞播生产模式（简称免耕飞播）在晚收水稻田中的生产适应性和实用性,于2018—2019年和2019—2020年在鄂东武穴市开展油菜田间试验,试验设有免耕飞播和习惯旋耕直播（简称旋耕直播）,评价2种模式下的油菜产量、肥料利用效率及经济效益的差异。结果表明,免耕飞播模式显著增加油菜产量、肥料偏生产力和经济效益。与旋耕直播模式相比,免耕飞播模式2年的油菜子平均增产216 kg/hm²,增幅为9.8%,N、P、K肥偏生产力分别平均提高8.1%、151.2%和147.6%,种植投入平均减少1 116元/hm²,净利润平均增加2 202元/hm²。说明油菜免耕飞播模式具有抢墒抢温播种、秸秆全面还田保墒保温和养分循环利用、油菜专用缓释肥一次性基施、机械开深沟防渍等优点,增产节本增收效果显著,是一种实用的轻简高效生产模式。     

Electroacupuncture-induced neural activation detected by use of manganese-enhanced functional magnetic resonance imaging in rabbits

OBJECTIVE: To investigate the effects of acupuncture on neural activity detected by use of manganese-enhanced functional magnetic resonance imaging (fMRI) and elucidate the relationship between somatic acupoint stimulation and brain activation. ANIMALS: 40 New Zealand White rabbits. PROCEDURE: Manganese-enhanced fMRI was performed in anesthetized rabbits manipulated with electroacupuncture (EA) on Zusanli (ST-36) and Yanglingquan (GB-34) acupoints. Image acquisition was performed on a 1.5T superconductive clinical scanner with a circular polarized extremity coil. T1-weighted images were acquired sequentially as follows: baseline, after mannitol injection, after manganese infusion, and 5 and 20 minutes after initiation of EA. RESULTS: Changes in focal neural activity were detected by use of manganese-enhanced fMRI. Stimulation on Zusanli (ST-36) for 5 minutes resulted in activation of the hippocampus, whereas stimulation on Yanglingquan (GB-34) resulted in activation of the hypothalamus, insula, and motor cortex. Activation became less specific after 20 minutes of EA. Furthermore, stimulation on ipsilateral acupoints led to bilateral brain activation. CONCLUSIONS AND CLINICAL RELEVANCE: Each acupoint has a corresponding cerebral linkage, and stimulation on these points resulted in time-dependent neural activation. Understanding the linkage between peripheral acupoint stimulation and central neural pathways may provide a useful guide for clinical applications of acupuncture.