祛风化痰针刺法改善假性球麻痹吞咽功能障碍的多中心临床观察

目的系统观察祛风化痰针刺法改善假性球麻痹患者吞咽功能障碍的作用。方法将240例确诊为风痰型假性球麻痹的患者随机分为治疗组和对照组,每组各120例,分别给予祛风化痰针刺法和模拟针刺法治疗,取穴风池(双)、完骨(双)、廉泉、丰隆(双)。每天上、下午各针刺1次,连续6 d为1疗程,疗程间休息1 d,治疗4个疗程。采用洼田饮水试验方法于治疗前、治疗2、4个疗程后进行吞咽功能级别评定,4个疗程后进行疗效评定和比较。结果第2个疗程结束后两组患者的吞咽功能评级与治疗前比较有较显著的提高,差异有统计学意义(P<0.01),治疗组优于对照组(P<0.05);与治疗前比较,第4疗程结束后吞咽功能评级进一步显著提高,差异有统计学意义(P<0.01),治疗组较对照组更优,差异有统计学意义(P<0.01);治疗组的治愈率、显效率和总有效率均显著高于对照组,差异有统计学意义(P<0.01)。结论祛风化痰针刺法改善假性球麻痹患者吞咽功能有肯定、持续且显著的作用,有较大的临床应用价值。     

膜荚黄芪子叶节植株再生体系的建立

以膜荚黄芪无菌苗子叶节为外植体,建立了简单、高效和稳定的膜荚黄芪再生体系。结果表明:不定芽诱导的最适培养基是MS+6-BA 1.0mg/L+NAA 0.10mg/L,每个子叶节外植体平均出芽数为3个以上,再生频率达75.5%;生根最适培养基为1/2MS+IBA 0.5mg/L;移栽后成活率达75%以上。     

留瓜节位对厚皮甜瓜植株生理特性、果重及可溶性固形物含量的影响

以塑料大棚栽培的厚皮甜瓜品种‘翠雪5号’为试验材料,探讨不同留瓜节位对不同节位叶片的生理生化指标、单果重以及可溶性固形物含量的影响。结果表明,‘翠雪5号’在第16节位留瓜时,可溶性蛋白（Pr）含量和叶绿素（Chl）高于第13节位留瓜,丙二醛含量（MDA）和愈创木酚过氧化物酶（POD）活性低于第13节位留瓜。然而,不同留瓜节位还会影响甜瓜植株衰老进程,对果实产量和品质有着重要的影响。一般来说,同一个品种春季栽培比秋季栽培的坐瓜节位要高2个节位左右,这样结出的瓜不仅果形好且大、产量高,糖度也高。     

COMPUTED TOMOGRAPHIC CHARACTERISTICS OF PRESUMED NORMAL CANINE ABDOMINAL LYMPH NODES

Though identification of lymph nodes is essential in staging cancer patients, little has been reported about the CT features of canine abdominal lymph nodes. The purpose of this retrospective study was to describe the visibility, location, and characteristics of abdominal lymph nodes in abdominal CT studies of dogs considered unlikely to have lymphadenopathy. The relationship between the number of identified lymph nodes and intraabdominal fat ranking, body weight, and slice thickness was also investigated. A total of 19 dogs were included. At least two jejunal lymph nodes and both left and right medial iliac lymph nodes were identified in all dogs. Colic lymph nodes were not identified in any of the dogs. Visualization of all other lymph nodes varied. There were significantly more lymph nodes visible in dogs with more intraabdominal fat (P < 0.0001). No correlation between the number of identified lymph nodes and body weight (P = 0.64) or slice thickness (P = 0.76) was found. Though most of all identified lymph nodes had an elongated shape, a rounded shape was most common in splenic, pancreaticoduodenal, renal, ileocolic and caudal mesenteric lymph nodes. Most lymph nodes had a homogeneous structure before and following the intravenous administration of contrast medium. Some lymph nodes had a slightly irregular structure or were relatively more hyper attenuating in the periphery than centrally before and/or after contrast administration. Mean attenuation before contrast was 37 Hounsfield Units (HU) (range 20–52 HU), and 109 HU after contrast (range 36–223 HU). Findings indicated that the CT visibility, characteristics of different abdominal lymph nodes may be variable in dogs.     

Clinical use of a ceramide-based moisturizer for treating dogs with atopic dermatitis

In humans, skin barrier dysfunction is thought to be responsible for enhanced penetration of allergens. Similar to conditions seen in humans, canine atopic dermatitis (CAD) is characterized by derangement of corneocytes and disorganization of intercellular lipids in the stratum corenum (SC) with decreased ceramide levels. This study was designed to evaluate the effects of a moisturizer containing ceramide on dogs with CAD. Dogs (n = 20, 3~8 years old) with mild to moderate clinical signs were recruited and applied a moisturizer containing ceramide for 4 weeks. Transepidermal water loss (TEWL), skin hydration, pruritus index for canine atopic dermatitis (PICAD) scores, and canine atopic dermatitis extent and severity index (CADESI) scores of all dogs were evaluated. Skin samples from five dogs were also examined with transmission electron microscopy (TEM) using ruthenium tetroxide. TEWL, PICAD, and CADESI values decreased (p < 0.05) and skin hydration increased dramatically over time (p < 0.05). Electron micrographs showed that the skin barrier of all five dogs was partially restored (p < 0.05). In conclusion, these results demonstrated that moisturizer containing ceramide was effective for treating skin barrier dysfunction and CAD symptoms.     

岭南庭园式植物专类园区研究——以华南植物园凤梨园为例

从总体分区和布局、历史变迁、景观格局以及重要的景观节点等方面对华南植物园凤梨园进行了全面的阐述,同时也展示了一种基于热带植物的岭南庭院式园林的造景方式。     

高地钩叶藤节间与节部导管及维管束形态特征径向变异规律

为了更好地了解棕榈藤材的性能、提高我国棕榈藤资源培育和高附加值加工利用水平,选用高地钩叶藤为研究对象,采用显微图像分析系统,对该藤2 m处的节间和节部的导管分子及维管束形态特征进行统计与分析。结果显示,节间与节部大导管分子长度、直径、密度的平均值分别为3 981.363和2 666.883 μm、198.235和202.402 μm、3.611和3.784个·mm^-2;维管束径向直径、弦向直径、密度的平均值分别为523.466和534.794 μm、373.624和379.823 μm、3.078和3.202个·mm^-2。经F检验,仅节间与节部的导管分子长度差异极显著(P＜0.05）。     

新疆早中熟棉花品种果枝数、果节数与成铃结构

【目的】分析182个南疆棉花品种(系)果枝数、果枝分布、果节数及果枝果节与成铃的关系,研究南疆早中熟棉花品种果枝数、果节数选择指数,为棉花高产育种提供理论依据。【方法】采用品种对比试验方法,收集比较新疆不同遗传背景的182个品种(系),测试不同品种(系)果枝数、果枝分布、果节数、成铃数等性状,分析南疆棉区气候条件下果枝、果节构成及果枝果节与成铃关系。【结果】182个南疆棉花品种的果枝数为4.6~10台, 果节数为7.6~21个,结铃数为5.4~12.2个,内围铃∶外围铃=3∶1;不同品种的果节数和单株结铃,随着果枝数的增加而增加,差异显著;果枝数与果节数、结铃数、内围铃数、上部铃数呈极显著正相关,果节数与结铃数、内围铃、外围铃、下部铃及中部铃具有极显著正相关性。【结论】在南疆气候条件下,应选择果枝数为8~10台果枝、果节量为18~20个的棉花品种,更有利于充分利用南疆有限的热量、积温条件,形成更高的产量。     

基于改进YOLOv5的甘蔗茎节识别方法

针对甘蔗智能切种机作业过程中背景杂乱导致茎节识别精度低等问题,提出了基于改进YOLOv5的一种甘蔗茎节识别方法。采用跨层级连接的方式优化颈部结构,增强不同层级间的信息融合能力;同时改进模型损失函数,一方面引入EIoU损失函数代替原始CIoU损失函数,提高边界框回归精度,另一方面利用Focal loss损失函数替换交叉熵损失函数,解决正负样本比例不均衡问题;最后引入Ghost模块轻量化网络模型。试验结果表明,本研究提出的模型相较于原模型,平均精度值提高了1.4个百分点,达97.80%,单张检测时间为16.9ms,模型大小仅11.40 Mb,实现了在不同杂乱程度场景下的甘蔗茎节识别,降低了切种时背景杂乱产生的影响。     

基于无线传感网络的农业无人机航线控制系统

无人机是一个由飞行器、控制站、通讯设备和其它部件形成的系统,在农业领域主要应用于农药喷洒、信息监测和农业保险勘察。农业无人机在飞行过程中的实际航线与规划航路之间会存在偏差,不仅降低了作业质量,还会影响作业效率。无线传感网络是一种与无人机紧密结合的技术,可以用于对无人机的航线进行控制。为此,基于无线传感网络,设计了无人机的航线控制系统。该系统由无人机平台、传感节点、汇聚节点和控制中心4部分组成,对航线的控制通过二维坐标系跟随算法完成。试验结果表明:无线传感网络对直线和曲线航线的跟踪更加稳定,具有较高的航线控制精确度。