Mineral composition of pigeon milk

Summary Mineral analysis of pigeon milk indicates its major elements to be P>Ca>K>Na>Mg (in that order) and trace elements Fe>Zn>Mn>Cu. Whereas the levels of Ca, K, Mg, Na and Mn remain fairly constant in the first week, those of P, Fe, Zn and Cu fall significantly during this period. Compared to cow's and human milk, pigeon milk has definitely higher levels of trace elements. Similarly, the trace mineral content of pigeon milk exceeds that of pigeon egg albumen or yolk. Except for Fe, Mn and Cu, pigeon milk is richer than adult pigeon feed in its mineral content. The Ca:P ratio of pigeon milk increases from 0.3 to 1.1 in the first five days. It appears that the high trace mineral content of pigeon milk is one of the factors contributing to the phenomenal postnatal growth of squabs.     

水晶生长两级计算机控制系统：下位机控制软件的设计与应用

介绍了高压釜水晶生长的两级计算机测，控系统的构成，着重讨论了下位机在实时多任务操作系统ｉＤＣＸ５１的运行环境下，任务的设置方法及应考虑的因素，给出了所使用的控制策略，系统的控制精度在±１℃以内，很好的满足了现场工艺要求。     

Plasma enteroglucagon,peptide YY and gastrin in rats deprived of luminal nutrition,and after urogastrone-EGF administration. A proliferative role for PYY in the intestinal epithelium?

Intestinal tissue mass was significantly reduced throughout the gastrointestinal tract (p<0.001) of=" intravenously=" fed=" (tpn)=" rats.=" urogastrone-epidermal=" growth=" factor,=" (uro-egf),=" reversed=" these=" changes.=" although=" plasma=" enteroglucagon=" and=" gastrin=" levels=" showed=" a=" small=" increase=" with=" uro-egf,=" this=" was=" far=" less=" than=" the=" gut=" tissue=" weight=" change,=" suggesting=" that=" it=" was=" unlikely=" that=" they=" were=" involved=" in=" modulating=" the=" proliferative=" response=" of=" the=" intestine=" to=" uro-egf.=" peptide=" tyrosine=" tyrosine=" (pyy)=" levels=" were=" however=" significantly=" increased=" by=" uro-egf,=" indicating=" that=" pyy=" may=" possibly=" have=" a=" role=" in=" the=" modulation=" of=" intestinal=" cell=">We thank the Cancer Research Campaign for their financial assistance and acknowledge the technical assistance of Mr W. Lenton.     

资源、科学技术与经济增长的系统分析模型

本文提出将资源与科学技术作为生产要素的总量生产函数,从信息处理的角度衡量经济系统的效率,建立兼顾当前消费水平与长远发展实力为目标的最优化模型.给出实现最优经济增长的投资模式.     

Host defense against infections and inflammations: Role of the multifunctional IL-6/IFN-β2 cytokine

Summary IL-6/IFN-2 appears to be one of the important mediators of the response to viral and bacterial infections and to shock. The biological effects now associated with IL-6/IFN-2 include: stimulation of immunoglobulin secretion by mature B lymphocytes (BSF-2 activity), growth stimulation of plasmacytomas and hybridomas (HGF activity), activation of T cells, stimulation of hepatic acute phase protein synthesis (HSF activity), stimulation of hematopoiesis, cell differentiation (DIF activity), inhibition of tumor cell growth (AP activity) and other IFN-like effects. As a typical cytokine, IL-6/IFN-2 is secreted by many cell types and acts in various combinations with other interleukins and interferons.     

Wound-induced alterations in survival of60Co irradiated mice: importance of wound timing

Summary Wounding mice shortly before or shortly after lethal⁶⁰Co irradiation enhances survival. Survival of wounded-irradiated mice may be due to enhanced hematopoietic recovery as measured by endogenous spleen colony (E-CFU-s) formation.Supported by the Armed Forces Radiobiology Research Institute, Defense Nuclear Agency, under research Work Unit 00129. Views presented in this paper are those of the authors; no endorsement by the Defense Nuclear Agency has been given or should be inferred.Research was conducted according to the principles enunciated in the Guide for the Care and Use of Laboratory Animals' prepared by the Institute of Laboratory Research, National Research Council.     

四川麸醋曲药中酵母菌的分离鉴定及发酵特性

通过平皿生化反应从四川麸醋曲药中分离出产酯能力较强的酵母菌,利用18S rDNA同源序列分析对其进行鉴定,研究其最适生长pH值、酒精耐受性、碳源和氮源同化能力,并利用顶空固相微萃取-气质联用技术对其代谢产物进行研究。结果表明:产酯透明圈实验分离出的产酯能力较强的酵母菌为异常威克汉姆酵母菌亚种(Wicherhamomyces sp. Lzcq 2014)。该株酵母菌的最适合生长pH值为5.0~5.5,在酒精度为10%的情况下几乎不生长;对不同碳源同化能力强弱顺序依次是葡萄糖、蔗糖、麦芽糖、乳糖、淀粉;对不同氮源同化能力强弱顺序依次是酵母膏、蛋白胨、硫酸铵、尿素。该酵母菌代谢产物主要成分为乙酸乙酯,其质量浓度为0.64079mg/L,且乙酸乙酯浓度远高于其他代谢产物。其他代谢产物分别为甲酸异戊酯、丙酸苯乙酯、苯乙醇,质量浓度分别为0.04136、0.03943、0.02300mg/L。     

财政分权对地方公共福利的影响——基于非线性和异质性的考量

地方公共福利主要由政府提供.财政分权对地方公共福利影响的研究呈现差异化,本文致力于研究财政分权对地方公共福利的非线性影响.本文首先运用内生增长理论,探究了财政分权与地方公共福利水平的动态关系.结论表明:财政分权与地方公共福利呈倒U型关系.然后,以中国2004-2014年省际面板数据为例,进行实证检验.结论表明:支出分权与公共交通基础设施服务呈倒U型关系,与公共医疗卫生服务、公共基础教育服务均不呈倒U型关系;通过采用不同的分权指标,证明了结论是稳健的;支出分权效应具有明显的地区异质性.希望本文研究思路与结论对财政分权对地方公共福利非线性效应的学术研究有一定的启发性.     

骨质疏松患者FGF23与Crosslaps血清浓度检测与分析

目的:探讨骨质疏松症(Osteoporosis,OP)患者外周血成纤维生长因子23(Fibrobalst growth factor-23,FGF23)、Ⅰ互型胶原交联C末端肽(Crosslaps)与25-(OH)D代谢水平与骨质疏松症的关系.方法:选择骨质疏松女性患者32名,年龄48~90岁(OP组),与21名健康人年龄31~50岁(对照组).采用酶联免疫吸附法检测外周血FGF23,Crosslaps及25-(OH)D水平.采用全自动血液生化分析仪检测血钙、血清无机磷、碱性磷酸酶(Alkaline phosphates,ALP)水平,并对OP患者25-(OH)D与FGF23、Crosslaps、血钙、血磷的相关性进行分析.对53名受试者进行骨密度(Bone mineral density,BMD)测量及医学影像学检测.采集OP患者及健康人股骨骨样进行石蜡包埋、切片、HE染色并观察,采用病理学图像分析系统进行形态计量学分析.结果:与对照组比较,OP组患者血清中FGF23、Crosslaps水平显著升高(P0.05);OP患者血清中25-(OH)D水平与FGF23相关系数为-0.012 2,与Crosslaps相关系数为-0.231 7;通过骨组织形态计量学分析,OP患者骨小梁平均厚度、骨小梁面积百分率较对照组显著减少(P0.05),OP组骨小梁间距较对照组显著增大(P0.05).OP患者左侧股骨颈(Femeralneck,FN),Ward's三角(Ward's)骨密度值与对照组均有显著减少(P0.05).通过影像学检测发现OP组X光片透光度有所增加,骨小梁变细,骨皮质变薄.结论:骨质疏松症患者血清中FGF23,Crosslaps因子水平与25-(OH)D水平存在一定相关性.提示其在骨代谢所引起的血清水平变化,以及三者之间的关系可为骨质疏松症的诊断和治疗提供参考.