日照茶叶生产基地绿茶品质评价分析

研究了日照茶叶生产基地BDC,BBSZ和BYQ3个茶园的福鼎大白、黄山群体和鸠坑3个绿茶品种主要生化成分的含量,并将其与浙江龙井、福建乌龙茶名种等南方优质绿茶的各生化成分进行对比分析。结果表明,3个绿茶品种中,鸠坑的品质最好,福鼎大白次之,黄山群体最差,但日照绿茶总体品质要．优于各南方绿茶。     

山东夏甸金矿区道北庄子金矿床地球化学异常分带模型研究

道北庄子金矿床是一个构造破碎带蚀变岩型金矿床.文章通过对各类微量元素和烃类组分在该矿床不同中段的含量变化以及在纵向上的异常展布和富集规律进行分析和总结,建立了该矿床的地球化学叠加异常分带理想模型,为其深部以及周边地区的找矿预测提供了科学依据.     

瘤背石磺营养成分分析及品质评价

利用常规营养测定方法测定了10只瘤背石磺（Onchidium struma）的营养成分。结果表明,瘤背石磺活体（鲜样）的水分、粗灰分、粗蛋白、粗脂肪质量分数分别为88．78％、3．95％、6．30％和0．63％。其肌肉中含17种氨基酸,总质量分数为55．77％（脱脂干样）,其中,7种人体必需氨基酸总含量为15．63％,占氨基酸总量的27．80％。瘤背石磺必需氨基酸比例符合联合国棉农组织／世界卫生组织标准。瘤背石磺的限制性氨基酸是赖氨酸和色氨酸,4种鲜味氨基酸干样的总质量分数为25．33％。瘤背石磺不同部位的蛋白含量不同,表现为精卵巢蛋白〉腹足蛋白〉外套蛋白〉肝脏蛋白,且差异显著（P〈0．05）。矿物质元素含量丰富,钙、磷、铁、锌、铜含量较多,比例适宜,脂溶性维生素A、D、E含量丰富。营养成分分析结果表明,瘤背石磺具有较高的食用价值和保健作用。     

马氏珠母贝育珠术前处理和术后休养期软体部生化组成的变化

以2龄马氏珠母贝为材料,建立S1(对照组)、S2(术前处理后不插核)、S3(术前处理后插核)和S4(不做术前处理直接插核)四个试验组,每组500个个体。比较研究了术前处理和休养期间各组软体部干重和糖、脂肪、蛋白质含量的差异。试验结果如下:(1)术前处理后,S2和S3组软体部干重显著小于S1组(P<0.05);S2组短期休养后恢复到S1组水平;S3组在休养期结束后仍然显著小于S1组(P<0.05)。(2)插核后,S4组软体部干重显著小于S1组(P<0.05);休养20天后恢复到S1组水平;(3)术前处理后,S2和S3组的软体部糖、脂肪含量明显下降。(4)插核后,S4组的软体部糖、脂肪含量明显下降。(5)试验期间,各组蛋白质含量总体呈上升趋势。结果表明术前处理能够有效降低育珠贝的生理活性;术前处理的马氏珠母贝表现出补偿生长效应,并在营养限制或创伤后的恢复过程中,首先利用体内储存的糖原和脂肪。     

FACTOR ANALYSIS OF A SIMULATED DATA MATRIX INVOLVING AQUEOUS COMPLEX EQUILIBRIA

Abstract factor analyses were performed on databases consisting of simulated samples from aqueousequilbria.The program COMPLEX was used to generate equilibrium species in a system of three reactantmetals and five reactant bases.Reactant concentrations and pH were drawn from random-normaldistributions so that sample data vectors comprised a multivariate log-normal distribution of equilibriumconcentrations.In addition,sample groups were created containing different distributions for pH andreactant concentrations.Equilibrium species were shown to contain variance contributed by change in pH among samples aswell as change in reactant concentrations.Factor modelling revealed the qualitative relationships amongthe species and how the relationships change with pH.Factors also revealed those reactants containingvariance in the data matrix.In some cases,reactant variance obscured relationships between pH and theequilibrium species.Since factor modelling of a simulated data matrix revealed the expected chemical equilibriuminteractions,a potentially powerful tool exists for investigating the effects of outliers and error.     

Allometry in the pliocene bivalveAstarte omalii: A new look at an old data set

The relationships between ontogeny and phylogeny have been studied for the bivalve Astarte omaliifrom the Lower, Middle, and Upper Pliocene of Belgium using canonical variates analysis, principal components in the form of multivariate allometry, and bivariate power functions or allometric equations. The results indicate that the three samples represent segments of a single evolutionary lineage which is characterized mainly by paedomorphosis where adult descendants are similar to juvenile ancestors. Recapitulation or peramorphosis is only observed for a single parameter. The Lower and Middle Pliocene samples are considered as Astarte omalii omalii,whereas the Upper Pliocene specimens are placed in A. omalii basteroti.The evolutionary trends most likely reflect changes in the living positions of the bivalves.     

南极乔治王岛长城站地区火山岩中矿物包裹体的研究

本文主要讨论了长城站地区第三纪火山岩系的透辉石和斜长石中熔融包裹体的特征、均一温度、挥发组分、玻璃和子矿物的化学成分。透辉石中熔融包裹体均一温度为1070～1170℃,斜长石中熔融包裹体均一温度m≥1100℃。透辉石和斜长石熔融包裹体气泡中组分CO_2为45～93％,H_2S为微量～35％,CH_4为2～20％和CO为2～14％,少量为N_2,O_2,H_2O和H_2。这些组分从火山喷发早期至晚期呈规律性变化。对熔融包裹体的玻璃和子矿物进行成分测定,其子矿物为钙铁橄榄石。     

DISCRIMINANT PRINCIPAL COMPONENTS ANALYSIS

When the number of variables exceeds the number of samples, one method of multivariate discriminationis to use principal components analysis to reduce the dimensionality and then to perform canonicalvariates analysis (PC-CVA). This paper proposes an alternative approach in which discriminant analysisis carried out by a weighted principal component analysis of the group means (DPCA). This method doesnot require prior data reduction and produces discriminant factors that are orthogonal in the original dataspace. The theory and performance of the two methods are compared. Although the individual factors ofDPCA are found to be less discriminating than PC-CVA, the overall discrimination, calculated bymultivariate analysis of variance, and the predictive value, estimated by the leaving-one-out error rate,are broadly comparable.     

塔北天然气组分特征及同位素组成

通过对塔北天然气32个样品的化学组分特征,甲烷的碳、氢同位素组成及关系,以及单烃碳同位素系列特征,甲烷的碳同位素组成与烃类组分关系等方面的综合研究揭示了塔北不同油气区不同井位天然气的成因类型以及某些井位天然气的来源,为塔北油气勘探提供了有价值的信息。     

An empirical assessment and illustration of some multivariate morphometric techniques

An artificial data set is used to illustrate the morphologic properties of some common multivariate techniques and consideration of three common situations. The first concerns a sample showing no obvious groupings. In this situation principal components (or coordinates) and factor analyses give a logical ordination of form variation; cluster analysis produces sizedominated groups. The second situation considers an homogeneous sample where size and shape have important implications. Principal components are tested for association with size and shape, both of which can be isolated if isometry exists; if allometry is present, isolation of shape is possible only by size elimination, e.g., conversion to ratios. The third situation examines a sample of unknown groupings in which shape variation is the only interest. Aside from ratios, two other methods which produce shape-dominant clusters are assessed. Some of the options available in cluster analysis are also examined.