BSG怠速起停系统车辆控制策略研究

对怠速起停系统节油原理及影响因素进行分析。根据驾驶员安全性、驾驶习惯和舒适性及油耗排放性能,制定BSG起停系统发动机自动停机控制策略、发动机自动起动控制策略、关闭起停系统控制策略及起停协调控制策略,并设定各控制参数阈值。应用该策略搭载实车进行试验,结果表明起停控制策略可按驾驶员要求控制车辆起停。BSG系统NEDC综合工况节油4%~5%,城市工况节油12%,实际城市使用工况节油8.1%。BSG起停系统车辆排放满足国V要求,CO和THC污染物排放量明显降低,但NOx排放量略有升高。     

籼型水稻不育系Ⅱ－32A和优ⅠA花培提纯研究

籼型水稻不育系Ⅱ－３２Ａ和优ⅠＡ同为印尼水田谷６号胞质。利用花培纯合效应，于１９８９年对这２个不育系及其相应保持系同步进行了花药培养，诱导出了一批正常二倍体花粉植株，并通过逐代测配筛选、行性鉴定和配组，杂交优势比较，获得了基因纯合、遗传稳定的Ⅱ－３２Ａ和优ⅠＡ的优良花培提纯株系。     

酸奶发酵剂生产技术及其质量控制

本文着重从酸奶发酵剂培养基的加热强度、菌种选择及接种周期等方面进行质量控制.结果表明,高质量的菌种培养基热处理强度以1kg/cm~2保持15min为宜,接种周期不得超过7-10天.     

Quantitative bacterial cultures and cytological examination of bronchoalveolar lavage specimens in dogs

Cytology and quantitative bacterial cultures of lower respiratory tract secretions are widely used in human medicine to differentiate airway infection from simple bacterial colonization. A retrospective study was conducted to determine the usefulness of quantitative aerobic cultures and Gram stain intracellular bacteria counts from bronchoalveolar lavage (BAL) specimens in dogs in diagnosing lower respiratory tract infection (LRTI) and to determine whether chronic bronchitis is associated with marked bacterial growth in dogs. The threshold determined to define clinically relevant bacterial growth was 1.7 x 10(3) colony-forming units per milliliter of BAL fluid. We used this threshold and found that diagnostic sensitivity and specificity were 86% and 100%, respectively. With a threshold for infection of >2 intracellular bacteria observed in any of 50 fields, microscopic examination of Gram stain BAL preparations had a sensitivity of 71% and a specificity of 97% in establishing LRTI. There was a high correlation between bacterial morphology on BAL Gram stain and bacterial cultures. Combining the results of intracellular bacteria counts from the BAL Gram stain with those from the quantitative cultures, the sensitivity in diagnosing LRTI was 87% and the specificity was 97%. BAL quantitative cultures as well as quantitating intracellular bacteria on Gram stain BAL cytology were revealed to be useful in identifying LRTI in dogs. Chronic bronchitis does not appear to be associated with marked bacterial growth in dogs.     

Inhibition of in vitro lymphocyte blastogenesis by chicken alpha-fetoprotein

Chicken alpha-fetoprotein (ch-AFP), purified from fetal chicken serum and embryo extracts, respectively, was examined for its immunomodulatory effect in vitro. Significant (P less than 0.05) suppression of the allogeneic mixed lymphocyte reaction (MLR) was observed, when these preparations were added to one-way mixed lymphocyte cultures (MLC) in quantities of 62.5-1000 micrograms/ml. Suppression of the MLR was depending on the presence of ch-AFP for at least 16 h after initiation of the MLC, suggesting that this fetal protein was acting mainly in the early phase of lymphoblastogenesis. Serum of chicken embryos (12th and 15th day of incubation), day-old chickens, and of 10-week-old chickens of four different inbred lines were also found to exert suppression of the MLR. From these data, it is hypothesized that ch-AFP plays an immunoregulatory role by maintaining a certain stage of self tolerance during differentiation of the avian immune system.     

大花君子兰幼胚培养研究

用授粉后１０８天的大花君子兰幼胚离休培养表明，幼胚发芽力与胚大小有关。ＭＳ＋ＫＴ１．０ｍｇ／ｌ＋ＮＡＡ０．５ｍｇ／ｌ的培养基有利幼胚发芽。１／２ＭＳ培养基中添加ＩＢＡ０．１ｍｇ／ｌ、ＩＢＡ０．５ｍｇ／ｌ＋活性炭３ｇ／ｌ或ＩＢＡ１．０ｍｇ／ｌ＋活性炭３ｇ／ｌ都能使幼苗生根。试管培养具有促进幼胚发芽、缩短育苗时间的显著效果。     

开食料对犊牛生长发育的影响

利用20头8日龄黑白花公犊研究开食料中添加乙酸钠和瘤胃酶制剂对其生长发育的影响,持续60天。结果表明:开食料及添加剂对公犊生长有明显的促进作用。试验组总增重、胴体、腓肠肌重以及瘤网胃重量均显著高于对照组,分别为:31.3±1.33kg,37.2±1.16kg,0.624±0.02kg,1.30±0.07kg。而对照组相应为:26.70±0.95kg,33.3±1.16kg,0.555±0.01kg,1.06±0.04kg。肌肉组织代谢分析表明:开食料及添加剂具有加强组织代谢,促进肌肉蛋白合成之功效。试验组腓肠肌总RNA 和 RNA/干重比对照组分别提高20.89%(P<0.01)和10.83%(P<0.01),GPT/DNA 增加46.32%(P<0.05)。血清三碘甲腺原氨酸(T_3)浓度提高14.28%(P<0.05)。提示:开食料中添加乙酸钠和瘤胃酶制剂能促进瘤胃发育,改善代谢过程,提高生长速度。     

Long-term callus cultures of diploid Barley (Hordeum vulgare). I. Auxin effects on culture initiation and maintenance

Summary Use of 2,4-D was superior to NAA or IAA for embryogenic callus initiation or maintenance in barley cultivar Bruce. A concentration of at least 2.0 mg/l 2,4-D was desirable for culture initiation. The developmental size of the embryo was more important than embryo age for obtaining embryogenic calli. Even brief exposures (20–40 days) of calli to concentrations of higher than 5.0 mg/l 2,4-D or 10.0 mg/l NAA resulted in inhibition of subsequent plant regeneration and therefore, concentrations above these could not be used for maintenance cultures. In the long-term maintenance cultures, the best production of embryogenic calli was with 0.1 mg/l and 1.0 mg/l 2,4-D.     

不同应激处理方式对乳酸菌喷雾干燥过程中存活率的影响及内在机制

采用喷雾干燥技术制备乳酸菌发酵剂虽然能极大地提高生产效率,但制备的发酵剂活菌数低是目前面临的瓶颈问题.为了提高乳酸菌在喷雾干燥过程中的存活率,本文综述不同应激方式对乳酸菌喷雾干燥过程中存活率的影响,通过应激处理可使乳酸菌产生相应的应激蛋白来修复或降解受损蛋白,或调整细胞膜中脂肪酸的组成成分,维持细胞膜的稳定性以及调节细...     

中西方文化融合视角下欧式木制家具的设计创新

随着经济全球化的快速发展,不同文化之间的交流日益频繁,全球各地乃至各行各业之间的文化交流已成必然。家具制造业中不同文化的融合与创新,促进相关家具产品的设计创新。基于当前家具行业发展现状和生产实践,探讨激烈的中西方文化融合对欧式木制家具设计的影响,阐述其进一步的发展理念与方向。