昆明草坪草混播配方优化组合模式探讨

在昆明独特的气候条件下,通过对运动场草坪、观赏草坪和护坡草坪三类草坪混播配方的调查研究,探讨出了适应云南地区种植的9种优化组合。运动场草坪:草地早熟禾(Poa pratensis L.)+高羊茅(Festuca arundinacea Schreb.)+多年生黑麦草(Lolium perenne L.),草地早熟禾+高羊茅,草地早熟禾+狗牙根(Cynodon dactylon(L.)Pers.)+多年生黑麦草;观赏草坪:草地早熟禾+匍匐翦股颖(Agrostis stolonifera L.),草地早熟禾+紫羊茅(Festuca rubra L.),草地早熟禾(优异)+草地早熟禾(蓝月)+草地早熟禾(新哥来得)+草地早熟禾(肯塔基);护坡草坪:高羊茅+多年生黑麦草+狗牙根,高羊茅+多年生黑麦草+狗牙根+白三叶(Trifolium repens L.),高羊茅+多年生黑麦草+狗牙根+白三叶+紫花苜蓿(Medicago sativa L.)。     

伸缩片式番茄移栽机取苗器设计

穴苗移栽是农业种植的重要环节,移栽机的出现为移栽作业提供了方便。为了提升穴苗移栽机的取苗效率,适应移栽机整排取苗的要求,开发了一款伸缩片式取苗器,通过分析其工作原理并对取苗器关键部件进行计算,采用MatLab GUI仿真程序对取苗器的关键部件进行运动距离验证,形成满足取苗条件的取苗器末端运动轨迹。最后,通过三维打印完成样机试制,采用连续摄影完成对实物的轨迹验证,并进行不同含水率下的取苗试验。结果表明:当取苗器伸缩片长度为55mm、苗针安装角度为79°、基质含水率为56.5%时,取苗效率达到80.47%;基质含水率为68.8%时,基质破损率最小为1.25%。     

调味料生产线中粉碎系统改造设计

复合调味料在生产中,因粉碎车间布局不合理,常出现原料在粉碎过程中,产生粉料串味、吸潮结块、原料损失严重、卫生指标难以控制、车间内粉尘飞扬及工人操作劳动强度大等问题。针对这些问题,在原布局基础上,对生产车间和粉碎系统进行了改造设计,使之满足复合调味料粉碎加工工艺及产品质量要求,减轻劳动强度,提高经济效益。      

教学中的归纳与记忆

就《机械原理》与《材料力学》中的几个知识点，介绍教学体会。     

钙与红江橙裂果的关系研究

红江橙采前裂果严重，裂果率与果皮Ｃａ和盐酸溶性果胶含量负相关，与水溶性果胶正相关。分别用０．２％的ＣａＡｃ和ＣａＣｌ２两次叶面喷施于红江橙，可显著提高果皮Ｃａ的含量，减少水溶性果胶量，增加盐酸溶性果胶量，从而提高果皮破裂压力，使果皮变韧，减少裂果率。ＣａＡｃ比ＣａＣｌ２的使用效果更佳。     

黄瓜果皮光泽性状的遗传分析及基因定位研究

 以黄瓜（Cucumis sativus L.）果皮有光泽自交系‘1101’（P1）为母本,以3 个无光泽自交 系‘1116’（P2）、‘9930’（P3）、‘1107’（P4）为父本,分别构建6 世代遗传群体,对黄瓜果皮光泽性状 进行遗传规律分析和基因定位研究。结果表明,黄瓜果皮有光泽性状由显性单基因G 控制,有光泽对无 光泽为显性。利用‘1101’ב1116’的F2 群体,结合分离群体分组分析法（bulked segregate analysis, BSA）筛选得到了30 对与黄瓜果皮有光泽基因G 相关的SSR 标记,将该基因定位到黄瓜第5 染色体上, 侧翼标记为CS28 和SSR15818,遗传距离分别为2.0 cM 和6.4 cM。两侧翼标记之间的物理距离为454 kb, 在该区域中共预测了177 个候选基因。     

CYP450 epoxygenase/EET pathway attenuates adipose inflammation of obese mice through HIF-1α

AIM To investigate the effects of cytochrome P450 （CYP450） epoxygenase/epoxyeicosatrienoic acid （EET） pathway on insulin resistance in obese mice, and to explore the possible mechanisms. METHODS High-fat diet-induced obesity model was established in C57BL/6Cnc mice, and the obese mice were randomly divided into 3 groups, including obesity group （treated with saline; n=10）, EET group （treated with 11,12-EET; n=10） and EET inhibitor 14,15-epoxyeicosa-5（Z）-enoic acid （EEZE） group （n=10）. Normal C57BL/6Cnc mice （n=10） treated with saline served as control. Protein expression of CYP2J2 （one of CYP450 epoxygenases） and hypoxia-inducible factor-1α （HIF-1α） was measured by Western blot. Vessel-like structure was detected by immunofluorescence staining. The serum levels of insulin, tumor necrosis factor-α （TNF-α）, interleukin （IL）-1β, IL-6 and monocyte chemoattractant protein-1 （MCP-1） were measured by ELISA. RESULTS In obese mice, homeostasis model assessment of insulin resistance （HOMA-IR） values were increased, the protein level of CYP2J2 was reduced, and the protein level of HIF-1α was increased in adipose tissues as compared with the controls （P<0.05）. The serum levels of MCP-1, IL-1β, IL-6 and TNF-α were also significantly increased in obese mice （P<0.05）. After treatment with 11, 12-EET, the HOMA-IR values were decreased compared with vehicle-treated obese mice, HIF-1α expression levels were decreased in the adipose tissue, and the serum levels of MCP-1, IL-1β, IL-6 and TNF-α were reduced （P<0.05）. Immunohistochemical results of adipose tissue from vehicle-treated obese mice showed a marked decrease in vessel-like structures （CD31-positive） compared with normal control mice （P<0.05）. EET treatment significantly increased the newly formed vessel-like structures in the visceral adipose tissues of obese mice as compared with vehicle-treated obese mice （P<0.05）. CONCLUSION High-fat diet-induced obesity and insulin resistance are closely related to the CYP450 pathway. Exogenous EETs effectively decrease obesity-induced insulin resistance possibly through pro-angiogenesis and attenuation of hypoxia and inflammation.     

膨胀石墨的多孔结构及其应用

膨胀石墨作为一种多孔材料，有望在溢油吸收、脱除废气、催化剂载体等多方面得到广泛应用。综述了有关膨胀石墨孔结构的研究结果以及它在有关领域的应用。     

物流配送网络选址的模糊数学模型及其算法

本文从供应链上企业的生产和客户需求的不确定性出发,提出了物流配送网络选址优化问题的带模糊约束规划的数学模型,并结合算法的特点提出其对应的混合遗传求解算法,模拟结果表明此算法可得到质量更高的优化解.