中国淡水蛏人工催产研究

介绍了中国淡水蛏(Novaculinachinensis)人工催产的方法和结果.采用氨水浸泡、流水刺激、阴干和低温处理等方法,进行单、双因子比较实验.结果表明:不同的催产方法,其效果有显著的不同,不论采用何种方法催产,对雄体的催产速度多是快于雌体.阴干、阴干+流水的方法催产不能成功;流水刺激和低温处理的方法虽然能催产,但催产率非常低;氨水浸泡或阴干+氨水浸泡的方法均能成功催产.亲贝采用体积分数为5×10-5和1×10-5的氨水浸泡1h催产效果最好,潜伏期不到40min,催产率高达60%以上.     

微波辅助提取紫甘蓝天然色素工艺优化

采用微波法辅助提取紫甘蓝菜色素,改进了传统的浸提工艺,通过单因素和正交实验确定微波辅助提取的最佳工艺条件。结果表明:原料为1g粉粹的干紫甘蓝,采用水作为提取剂、微波功率为450W、提取时间为3min、液固比为10:1(mL:g)。与传统的浸提法和超声波辅助提取相比,时间由4h和50min缩短为3min,微波辅助提取色素具有时间短、耗能低等优点。     

黄粉虫幼虫粉对高血脂大鼠血脂水平的影响

为了探讨黄粉虫幼虫粉是否有降血脂的作用 ,将 32只高血脂大鼠随机分成 4组 :分别饲喂占大鼠体重 3%、10 %剂量的黄粉虫幼虫粉饲料组 ,饲喂降血脂药物血脂康0 .0 2g/(kg·d- 1)的药物对照组 ,对照组 .对这 4组同时饲喂高脂饲料 ,另外选择正常血脂大鼠 8只饲喂占大鼠体重 10 %剂量的黄粉虫幼虫粉饲料作为正常血脂对照组 .于给样后第 14d和第 2 8d分别取血 ,测定血清中总胆固醇 (TC)、甘油三酯 (TG)和高密度脂蛋白(HDL C)等指标 .研究结果表明 ,不同剂量的黄粉虫幼虫粉均可显著抑制高血脂大鼠血清中TC、TG的升高 (P <0 .0 1) ,说明黄粉虫幼虫粉有较明显的调节血脂作用 .     

三峡库区消落带巴东组软岩裂纹扩展规律

在库水位升降作用下,三峡库区消落带软岩力学性质逐渐劣化,直接影响了库岸的稳定性。裂纹扩展是岩石劣化的直接原因之一,因此选取三峡库区巴东组第四段泥质粉砂岩为研究对象,采用自制的裂纹测定装置,研究泥质粉砂岩在"浸泡—风干"循环条件下的裂纹扩展规律。研究结果表明:1随着泥质粉砂岩"浸泡—风干"循环次数的增加,试件裂隙率明显增大,初期阶段裂纹的扩展速率较快,后期逐渐减缓;2泥质粉砂岩的裂隙率与"浸泡—风干"循环次数可以用指数函数较好的拟合,拟合相关性系数为0.996,拟合度高,可以为后续发展趋势进行预测。     

煅烧牡蛎壳粉对土壤酸化及琯溪蜜柚果实的改善效果

以煅烧牡蛎壳粉为试验材料,对种植琯溪蜜柚的酸性土壤进行为期1年的田间跟踪试验,并对果实品质的改善效果进行研究。采用4个施用量组:0 (对照组CK),1.25 (T1组),2.50 (T2组),3.75 kg/棵(T3组),1次施用后每隔3个月对土壤样本进行pH值、容重、有机质含量的检测。蜜柚成熟后进行糖酸比、固酸比、维生素C含量、汁胞硬度和感官评价试验。扫描电子显微镜观测发现,牡蛎壳煅烧后微孔结构明显增多,且孔径大小介于2～10μm。施用煅烧牡蛎壳粉后,土壤pH值和有机质整体呈现先增加后降低的趋势,容重值呈现逐渐降低的趋势。随着煅烧牡蛎壳粉施用量的增多,果实的糖酸比、固酸比、汁胞硬度值逐渐增大(T3T2 T1 CK),维生素C含量先升高后稳定。T3组的土壤pH值增加效果最显著(P 0.01),从(3.23±0.13)提高到(4.62±0.46),提高1.39个单位;T2组的土壤容重值降低最显著(P 0.01),从1.34 g/cm~3降低到1.11 g/cm~3,降低17.16%。施用6个月后,T1组的土壤有机质含量显著增加(P 0.05),从初始值14.42 g/kg提高至27.21g/kg,增加了168.24%。对果实的分析发现,T3组糖酸比和固酸比的改善效果最明显,但差异不显著,与对照组相比分别提高26.14%和18.04%;该组果实的汁胞硬度最低,比对照组降低了37.36%,存在极显著差异(P 0.01);T2组果实的维生素C含量最高,较对照组增加2.21%,存在显著性差异(P 0.05)。以上结果表明,煅烧牡蛎壳粉能够显著改良土壤酸性,改善土壤板结现象,增加土壤有机质含量,同时提高了琯溪蜜柚果实品质和口感。     

煅烧牡蛎壳粉对荔枝园土壤酸化及果实品质的改良效果

为了探究煅烧牡蛎壳粉对‘南岛无核’荔枝园土壤酸化和果实品质的影响,设置CK组和T1~T3处理组,分别施加牡蛎壳粉0,1,2,3 kg/棵进行田间试验,并对土壤的pH值、容重和有机质含量等指标进行10个月的跟踪测定,在荔枝果实成熟后进行单果重、糖酸比、维生素C含量等品质指标的测定。结果表明,与对照组相比,T1组的土壤pH值由5.09提升至6.13,上升1.04,果实单果重提升20.79%,果实硬度升高52.14%,糖酸比、固酸比均有显著提升;T2组的土壤pH值由5.01提升至6.33,上升1.32,容重由（1.46±0.04）g/cm3下降至（1.28±0.02）g/cm3,果实硬度、糖酸比较对照组分别增加58.92%和42.32%;T3组的土壤pH值由5.08提升至6.27,上升1.19,土壤容重由（1.46±0.03）g/cm3降至（1.26±0.03）g/cm3,果实单果重和维生素C含量比对照组分别增加了28.35%和31.86%。可见,煅烧牡蛎壳粉能显著改善‘南岛无核’荔枝土壤酸化现象,降低土壤容重,促进植株对土壤养分的吸收利用,进而显著提升果实品质。     

多功能粉碎机

专利申请号 :992 0 130 4该粉碎机能粉碎秸秆用于喂牲畜和制酒的原料 ,并能粉碎玉米棒、骨头、豆角、豆饼、豆秆成粉 ,又能粉碎粮食、稻壳成面。既能粉碎干料 ,也能粉碎湿料 ,如青草打浆。该机有 3个进料口 ,分别进秸秆 ,骨头、玉米棒和粮食等颗粒。秸秆粉粹后可直喷入仓 ,粮食颗粒可直接装袋 ,粉面可直接入地仓。它可由 12马力柴油机、7.5ｋＷ～ 10ｋＷ三相电机拖动 ,还可用三四轮拖拉机拖动。其成本 10 0 0元左右 ,售价 2 0 0 0元 ,投产只需简单的机械加工设备。除黑龙江省以外地域进行技术转让 ,一县独家 1万元 ,一市独家 2万元 ,一省独…     

丁香柿蒂代赭石联合治疗中风后顽固性呃逆临床观察

目的探讨联合应用丁香、柿蒂、代赭石治疗中风后顽固性呃逆的临床效果,并对其不良反应进行研究.方法3组患者均以对症治疗为基础,后续按方案实施.治疗1组:丁香10 g,柿蒂10 g,代赭石10 g.治疗2组:丁香15 g,柿蒂15 g,代赭石15 g.治疗3组(对照组):甲氧氯普胺(胃复安) 10 mg口服,3次/d,或甲氧氯普胺(胃复安) 10 mg肌肉注射,1次/d.结果治疗7 d后,1组总有效率为85.37%,2组为93.22%,对照组为78.91%,治疗1组、治疗2组与对照组比较差异具有统计学意义(P0.05).治疗12 d后,与对照组比较,呃逆症状治疗2组改善更为明显,差异具有统计学意义(P0.05).3组患者药物不良反应发生率差异无统计学意义(P0.05).结论联合应用丁香、柿蒂、代赭石治疗中风后顽固性呃逆为一种安全且有效的方法.     

提高九叶青花椒发芽率和成苗率的试验研究

运用正交设计及统计分析方法研究了脱粒方式(A)、采种时间(B)、脱脂程度(C)和播种后覆盖处理(D)对九叶青花椒发芽率和成苗率的影响.结果表明:①影响九叶青花椒发芽率和成苗率的主导因子是脱粒方式(A)和采种时间(B);②脱脂程度(C)和播种后覆盖处理(D)会影响苗木出苗整齐度.③提高九叶青花椒发芽率和成苗率的最佳处理组合为A1B2C1D1,即种子采收后放在阴凉通风处阴干脱粒,过白露节10d后采收,脱粒后的种子用水浸泡2d后用碱水浸泡半天,播种后先覆盖一层稻草再覆盖地膜.     

碱性成纤维细胞生长因子胶原罩对兔角膜穿透伤的影响

目的 :尝试一种新的用药方式———应用浸泡有碱性成纤维细胞生长因子 (bFGF)的胶原罩治疗兔角膜穿透伤。方法 :实验兔 30只 ,随机分为 3组 ,每组 10只 ,在角膜中心各作一穿透性长 4mm切口。第 1组 :对照组 ;第 2组 :2 μg/mL的bFGF溶液滴眼组 ;第 3组 :bFGF胶原罩治疗组。结果 :测得各组角膜伤口承受压力的极限值有明显差异 (P <0 0 0 0 5 ) ,对照组为 (62 0 0± 8 2 5 )kPa ;bFGF滴眼组为 (10 2 0 0± 13 4 3)kPa ;bFGF胶原罩组为 (135 83± 9 85 )kPa。 3组外伤的修复 :bFGF胶原罩组效果最好 ,bFGF滴眼组次之 ,对照组最差。结论 :3组角膜伤口均为疤痕修复 ,以bFGF胶原罩组最好。     

雪莲果果干加工工艺的研究

本试验以雪莲果为原料,经清洗、切分、漂烫护色、干燥、回软等工艺,对其果果干制品的生产工艺进行了初步探索。试验表明,最佳复合护色剂选用0.15%的亚硫酸钠、0.20%柠檬酸和0.15%的抗坏血酸配制;热风变温干燥制成的产品品质较好,色泽呈亮黄色,口感细腻,组织致密。     

氧化活性炭前处理——海米中亚硝酸盐的光度法测定

利用氨基苯磺酸-N-(1-萘)乙二胺光度法,按一般前处理法测定海米中微量亚硝酸盐,标准偏差大,回收率低。本文将试样沉淀蛋白质后用过氧化氢氧化的活性炭处理,并控制试液pH值大于12.5,既能脱色和排除干扰NO_2~-测定的物质以及Cu~(2+)、Pb~(2+)、Ag~+、Hg~(2+)、Bi~(3+)、Fe(3+)等的影响,又能使活性炭不吸附NO_2~-,且使回收率提高到95％以上。8次试样测定结果的相时标准偏差为3.9％。     

离子色谱法测定鲜果和干果中的三种糖

建立离子色谱法分离检测两种鲜果和干果中葡萄糖、果糖和蔗糖的分析方法.采用METROSEP CARB 1(150mm×4.0mm)阴离子交换分离柱和脉冲安培检测器,对淋洗分离条件进行优化.确定柱温为32℃、淋洗液为180.0mmol/L NaOH溶液,淋洗液流速为1.0mL/min,总分析时间8min.在1.0-40.0mg/L范围内葡萄糖、果糖和蔗糖分别呈良好线性.相关系数分别0.99996、0.99992、0.99991,检出限分别为0.126mg/L、1.072mg/L、0.085mg/L,精密度为0.31%~3.50%,回收率为92.23%~102.37%.该方法具有预处理简单,结果准确和快速有效等优点,可为鲜果和干果的检测提供一个简单有效的方法.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.