湘东北虎形山钨铍矿区隐伏花岗岩体地球化学特征及成因研究

湘东北虎形山钨铍多金属矿床为一大型的石英、云英岩细脉带型白钨矿床和绿柱石铍矿床。本文通过对矿区内新发现的隐伏花岗岩体详细的岩石地球化学分析,探讨了该岩体的成因、物质来源和构造环境,以期为区域岩浆作用与成矿关系研究提供理论支撑。结果表明,虎形山花岗岩为富SiO_(2)(71.86%~73.22%)和Al_(2)O_(3)(13.99%~14.55%),贫TFe_(2)O_(3)(1.17%~1.63%)和MgO(0.28%~0.36%),且相对贫钠富钾(K_(2)O/Na_(2)O介于1.11~1.78之间)的高钾钙碱性、过铝质花岗岩,并具有强烈富集轻稀土元素(La_(N)/Yb_(N)=9.29~21.9)和大离子亲石元素(Rb、Ba、U、K)而相对亏损重稀土元素和高场强元素(Nb、Ti、P)的特征;虎形山花岗岩是在较低压力(<5 kbar)和初始温度为707~746℃环境中经高程度分离结晶作用(斜长石、钾长石、磷灰石等)形成的S型花岗岩,其地壳源区为泥质岩和砂屑岩组成的冷家溪群;结合区域构造演化,本文认为燕山期古太平洋板块的低角度俯冲造成湘东北地区地壳发生强烈的变形,随后区域应力的减弱使得增厚的岩石圈发生拆沉,在此情况下,地壳减薄或幔源物质底侵引起了该地区强烈的岩浆活动,进而形成了虎形山花岗岩。

安徽铜陵地区虎山岩体矿物成分特征及其锆石U-Pb年代学

铜陵地区虎山岩体主要由石英二长闪长岩和花岗闪长斑岩组成,属高钾钙碱性系列中酸性侵入岩。本文对虎山岩体进行了LA-ICP-MS锆石U-Pb定年,结果表明,虎山石英二长闪长岩和花岗闪长斑岩侵入时代分别为（143.2±1.2）Ma和（145.3±1.2）Ma,属晚侏罗—早白垩世,与中国东部J-K岩浆事件相呼应,并且,虎山岩体存在两次岩浆侵入活动,早期形成的花岗闪长斑岩的年龄为（145.3±1.2）Ma,与铜陵矿集区瑶山花岗闪长斑岩的年龄（146.0±0.9）Ma在误差范围内一致,晚期形成的石英二长闪长岩为（143.2±1.2）Ma,与区内的铜官山和天鹅抱蛋山岩体的年龄（142±1）Ma和（141.7±1）Ma一致。岩石地球化学及矿物温压计计算结果表明,岩浆结晶的温度为768~838°C、压力为3.44×108~5.42×108Pa,虎山岩体属幔源岩浆和壳源岩浆混合成因,且混合作用发生在11~18 km的浅位岩浆房。

Complete Sequence and Gene Organization of the Mitochondrial Genome of Tokay (Gekko gecko)

Long-PCR amplification, clone and primer-walking sequencing methods were employed in determine the complete sequence of mitochondrial genome of tokay (Gekko gecko). The genome is 16 435 bp in size, contains 13 protein-coding, 2 ribosomal and 22 transfer RNA genes. The mt genome of Gekko is similar to most of the vertebrates in gene components, order, orientation, tRNA structures, low percentage of guanine and high percentage of thymine, and skews of base GC and AT. Base A was preferred at third codon positions for protein genes is similar to amphibians and fishes rather than amnion vertebrates. The standard stop codes (TAA) present only in three protein genes, less than those of most vertebrates. Transfer RNA genes range in length from 63 to 76 nt, their planar structure present characteristic clover leaf, except for tRNA-Cys and tRNA-Ser (AGY) because of lacking the D arm.

EFFECTS OF DOPAMINE,ESTRADIOL AND TESTOSTERONE ON GONADOTROPIN RELEASE FROM THE PITUITARY FRAGMENTS OF Rana rugulosa

To understand the regulatory mechanisms of gonadotropin secretion in Rana rugulosa ,this study investigated the effects of dopamine (DA),estradiol (E 2) and testosterone (T) on the in vitro release of luteinizing hormone (LH) and follicle stimulating hormone (FSH) from the pituitary fragments of female Rana rugulosa using a static incubation system and radio immunoassay (RIA). The results indicated that DA at the concentration from 0 1?μmol/L to 10?μmol/L inhibited the release of LH and FSH from the pituitary fragments of sexually pre mature or hibernating individuals,and the inhibitory effects enhanced with increasing concentrations of DA. E 2 at 1?μmol/L and 10?μmol/L significantly stimulated the release of LH of sexually pre mature individuals,but inhibited their FSH release at 0 1?μmol/L to 10?μmol/L;T had no obvious effects on their FSH release,but significantly inhibited their LH release at 10?μmol/L. Neither E 2 nor T,at the concentration from 0 1?μmol/L to 100?μmol/L,had obvious effects on the release of LH and FSH of hibernating individuals. The data suggest that DA and sexual steroids may have direct regulatory actions on LH and FSH release at the pituitary level in Rana rugulosa ,and the action of sexual steroids may relate to the gonadal development stages (seasons).

Spatial variation of stable isotopes in different waters during melt season in the Laohugou Glacial Catchment, Shule River basin

To evaluate isotopic tracers at natural abundances by providing basic isotope data of the hydrological investigations and assessing the impacts of different factors on the water cycle, a total of 197 water samples were collected from the Laohugou Glacial catchment in the Shule River basin northwestern China during the 2013 ablation seasons and analyzed their H- and O-isotope composition. The results showed that the isotopic composition of precipitation in the Qilianshan Station in the Laohugou Glacial catchment was remarkable variability. Correspondingly, a higher slope of δ180-δD diagram, with an average of 8.74, is obtained based on the precipitation samples collected on the Glacier No.la, mainly attributed to the lower temperature on the glacier surface. Because of percolation and elution, the bottom of the firn the isotopic composition at is nearly steady. The 6180 /altitude gradients for precipitation and melt water were -o.37%o/100 m and -o.34%o/100 m, respectively Exposed to the air and influenced by strong ablation and evaporation, the isotopic values and the 6180 vs 6D diagram of the glacial surface ice show no altitudinal effect, indicating that glacier ice has the similar origins with the firn. The variation of isotopic composition in the melt water, varying from -l0.7‰ to -16.9‰ （8180） and from -61.1%o to -122.1%o （6D） indicates the recharging of snowmelt and glacial ice melt water produced at different altitudes. With a mean value of -13.3‰ for 8180 and -89.7‰ for 8D, the isotopic composition of the stream water is much closer to the melt water, indicating that stream water is mainly recharged by the ablation water. Our results of the stable isotopic compositions in natural water in the Laohugou Glacial catchment indicate the fractionations and the smoothing fluctuations of the stable isotopes during evaporation, infiltration and mixture.

Educational Press for Remote Experimentation Applied in the Spring to Study Hooke＇s Law

The aim of this study is to report the use of RE （remote experimentation） in an educational press. The authors developed this remote experiment with the objective to study the Hooke＇s law through the analysis of the coil spring. The remote experiment is available in a website, where the students can manipulate and observe the educational press and confirm Hooke＇s statements with the output information. In addition, the students will have the opportunity to read in the website about the educational press, the physical law, and the use of the press in industrial processes. This remote experimentation exerts a force in the mechanical spring creating a deformation. In the defined point, the microcomputer will collect the data from the sensors, and it will save this data in the database. After the process execution, a graph with the data will be plotted in the website. The tests confirm that the educational press has informational potential because it returned values consistent with Hooke＇s law and the experiment presented repetition in all tests realized.

In Vitro Propagation of Ardisia mamillata Hance

Ardisia mamillata Hance is a rare plant with highly ornamental and medicinal value. The traditional propagation methods for A. mamillata by seeds or cutting provided low proliferation rate. This study is to optimize the propagation technique of A. mamillata by tissue culture and set up an industrial production system to provide plenty of A. mamillata seedlings for the human demand. The optimal initiation medium for A. mamillata is MS +2.0 mg/L BA +0.1 mg/L NAA +30 g/L sugar, providing76.4% initiation rate. The optimal shoot proliferation medium for A. mamillata is MS+1.0 mg/L BA+0.1 mg/L NAA+30 g/L sugar, providing 4.56 fold proliferation rate and3.10 cm shoot in height. The optimal shoot elongation medium for A. mamillata is MS+0.5 mg/L BA+0.1 mg/L NAA+30 g/L sugar, providing 2.77 fold proliferation rate and 4.27 cm shoot in height. The optimal rooting medium for A. mamillata is 1/2MS+0.1 mg/L IBA +15 g/L sugar, providing 99.7% rooting rate, 4.0 roots per individual,7.53 cm root in length and 3.94 cm shoot in height. This provides a reliable mass propagation method for A. mamillata.

Study of Caspian Goby Neogobius sp. Karyotype Flexibility from Several Biotops

The karyotype of Caspian goby was studied, which has been identified as Caspian bighead goby-Neogobius gorlap before. The results of cytogenetic analyses have shown that the diploid set of goby varies from 38 to 40 chromosomes, which is different from bighead goby （2n = 43-46）. We assumed that Caspian goby has independence as a species.

Otolith chemical signatures of spottedtail goby Synechogobius ommaturus in coastal waters of China

This study explores the potential existence of local stocks of Synechogobius ommaturus using otolith chemical signatures. The concentrations of 10 elements （K, Ca, Na, Mg, St, Pb, Ba, Mn, Co, Zn） in the otoliths from eight stocks （Dandong, Dalian, Tianjin, Dongying, Weihai, Qingdao, Ganyu and Xiamen） ofS. ommaturus were measured by Inductively Coupled Plasma Mass Spectrometry and regressed against otolith weight. No significant correlation between otolith weight and concentrations of Na, Mg, Ca, Sr, Co, Ba, Zn and Pb were observed. Concentrations of K and Mn were correlated with otolith weight. Consequently, the residuals of the regressions were used instead of the original concentrations in subsequent analyses. Analysis of variance （ANOVA） showed no significant difference between males and females in otolith chemical signatures. Differences were found among the locations for K, Sr, Mn, Co, Ba, Pb, but not for Ca, Na, Mg and Zn. Residuals of the regressions of elemental concentrations against otolith weight that fitted the normal distribution and homogeneity were studied by discriminant analysis. The success of the discriminant function to predict the location of S. ommaturus capture ranged from 100% for Weihai and Xiamen stocks, to only 44.4% and 62.5% for Qingdao and Dandong stocks, respectively. The average prediction success was 80.3%.

湘西吉首出土东汉窖藏铜器

1983年3月1日,湘西土家苗族自治州吉首县河溪公社岩排大队后头溪生产队农民章翠玉在挖包谷地时,发现窖藏一个,出土东汉顺帝时期铜器八件。有錞于二件、壶一件、洗二件、釜三件,重量共六十四斤。錞于二件:为合范铸造,造型大体一致,錞于盘上嵌铸虎纽,其虎体瘦长.

Long-term optical and radio variability analysis of BL Lacertae 2200+420

Based on the radio light curves in 22 GHz and 37 GHz from the Metsahovi monitoring program and the optical light curves in BVRI bands from previously published results and the"Whole Earth Blazar Telescope"(WEBT)archives,we analyze the time delay among 22 GHz,37 GHz and optical bands(B,V,R,I)of BL Lacertae by means of discrete correlation method.The results suggest there exist strong correlation among 22 GHz,37 GHz and optical bands(B,V,R,I)with zero-lag.The 37 GHz lags behind R band by 11 months.The correlation of brightness and color index among BVRI bands,brightness and spectral index between 37GHz and 22 GHz are also investigated.The results show a clear trend of bluer-when-brighter.

Expression, subcellular localization and protein-protein interaction of four isoforms of EcR/USP in the common cutworm

Ecdysone receptor （EcR） and ultraspiracle （USP） form heterodimers to mediate ecdysteroid signaling during molting and metamorphosis. Various EcR/USP heterodimers have been reported. However, it is unclear what kind of EcR/USP combination is adopted by lepidopteran insects during the larval-pupal metamorphosis and whether the EcR/USP heterodimer varies among different tissues. To address these questions, two isoforms of each EcR and USP were cloned from the common cutworm, their messenger RNA expression patterns were examined by real-time quantitative polymerase chain reaction in different tissues during the larval-pupal metamorphosis and in the midgut in response to hormonal induction. Furthermore, their subcellular localization and protein-protein interaction were explored by transient expression and far-western blotting, respectively. All the four genes were significantly up-regulated in prepuae and/or pupae. The expression profiles of EcRB1 and USP1 were nearly identical to each other in the epidermis, fat body and midgut, and a similar situation also applied to EcRA and USP2. The three genes responded to 20-hydroxyecdysone （20E） induction except for USP2, and USP1 could be up-regulated by both 20E and juvenile hormone. The four proteins mainly localized in the nucleus and the nuclear localization was promoted by 20E. The protein-protein interaction between each EcR and USP was found in vitro. These results suggest that two types of EcR/USP heterodimer （EeRA/USP2 and EcRB 1/USP1） may exist simultaneously in the common cutworm, and the latter should play more important roles during the larval-pupal metamorphosis. In addition, the types of EcR/USP heterodimer do not vary in the tissues which undergo histolysis and regeneration during metamorphosis.

Field observations of putative bone-based fluorescence in a gecko

A diversity of animals are biofluorescent, absorbing shortwavelength electromagnetic radiation, and re-emitting it at longer wavelengths, giving a distinctive pattern （Lagorio et al. 2015）. Among terrestrial organisms, biofluorescence has been commonly recorded in arthropods, but rarely from vertebrates （Lagorio et al. 2015）. It has long been known from parrots （Hausmann et al. 2003） and has recently been recorded from a frog （Taboada et al. 2017） and from chameleons （Chamaeleonidae： Protzel et al. 2018）.