Camptotheca acuminata decne residue after camptothecin extract as a substrate to produce mushroom spawn     

Dunlian Qiu  Benhong Liu  Ya Tang  Zhirong Yang 《山地科学学报》2012,9(6):835-841

Currently in China,no technically and economically viable methods exist to handle large quantities of Camptotheca acuminata Decne residue(CA residue) after camptothecin extract while there is a great demand for low cost alternatives to replace the cottonseed hull-based materials used in commercial mushroom culture.Hence,it is of importance for camptothecin extract factories and mushroom producers to explore the utilization of CA residue in mushroom industry.We conducted a research to study how partially or completely substituting traditional mushroom substrate by CA residue would influence the mycelial growth in mushroom spawn production.5 mushroom strains from 4 species were used in the test,i.e.,oyster mushroom(Pleurotus ostreatu) strains,Zayou No.1 and Xide 33,needle mushroom(Flammulina velutipes) strain Chuanjin No.3,hairy wood ear(Auricularia polytricha) strain Huang Er No.10,and shiitake(Lentinula edodes) strain Wuxiang.The nutrient element composition and heavy metal contents of CA residue were determined to ensure its safety and to determine its appropriate component in the substrate formulation for mushroom spawn production.The four substrate formulations(one control-CK,and three treatments,named,T1,T2,T3,) contained 0%,40%,79%,and 100% CA residue,respectively,to allow comparison of the fungal mycelial growth.The control(CK) was the popularly used formulation in Chinese commercial mushroom production,comprising of 73% cottonseed hulls,10% sawdust,15% wheat bran,1% lime,1% white sugar(percentage by weight).All mushroom spawns of the five strains in the four treatments were incubated under the same conditions.The results showed that mycelia of the five mushroom strains grew significantly faster on the substrates containing CA residue than on the substrate with no CA residue(CK).There were no significant differences in the mycelial growth rate among treatments containing CA residue for the two oyster mushrooms and the needle mushroom,but mycelial growth rate in treatments T2 and T3 was significantly higher than in treatment T1 for hairy wood ear and shiitake.The results suggest that CA residue can be used to culture oyster mushroom,needle mushroom,hairy wood ear,and shiitake spawn,and the medium containing CA residue can stimulate their mycelial growth.The commercial production of mushroom spawn using CA residue not only brings better economical benefits including lower cost to mushroom producers,but also reduces environmental pollution by providing a means to reduce dumping and piling of CA residue.  相似文献   

基于X-CT 技术的韩城示范区煤储层精细描述     

陈同刚  汤达祯  许浩  吕玉民  孟艳军  陈云涛 《高校地质学报》2012,18(3):505-510

X射线层析扫描(X-CT)技术具有无损分析岩石内部结构特征的优点。应用该项技术,重构了韩城示范区煤样内部孔隙、裂隙和矿物的空间分布格架与形态。结果表明,煤样的CT像素频数存在两个峰值区间,分别表征孔隙-裂隙和矿物的发育特征。当孔隙、裂隙发育较好时,该峰左偏;矿物含量较高时,矿物峰右偏或峰值区间变宽。CT孔隙度、矿物含量与CT数有较好的相关性,CT孔隙度与氦气孔隙度显著正相关。通过煤样三维重构的三维表面蒙皮和三维立体模型,可以清楚地识别煤中孔隙、裂隙及矿物的空间形态特征和连通性。  相似文献   

准南独山子背斜构造几何学和运动学参数的确定及其意义     

王彦君  魏东涛  潘建国  刘震华  张健  李林峡 《高校地质学报》2012,18(4):711

独山子背斜位于准噶尔盆地南缘西部,早在上世纪30 年代就在背斜东部浅层新近系的沙湾组（N1s）发现了石油,是 我国新疆地区发现最早的油田。该区地震成像品质差,影响了人们对独山子背斜构造特征的明确认识,导致深层（古近系 及以下地层）油气勘探滞步不前。该文综合分析了地震、钻井及露头多方面资料,采用地震正演、运动学数值模拟多技术 配套、分步骤实现的定量化构造建模方法,以横跨独山子背斜主体的横剖面为蓝本,确定了独山子背斜的几何学和运动学 参数,最终建立了独山子构造的模型,并揭示其背斜为一三角剪切- 断层传播褶皱,位于主断裂--独山子断裂上盘并受 其控制;主断裂倾角为43°,断层错断白垩系吐谷鲁群（K1tg）至新近系沙湾组（N1s）地层,滑脱面为白垩系吐谷鲁群塑 性地层,前翼发育剪切三角变形区,顶角为25°。该模型有效降低了独山子背斜构造认识的多解性并表明：独山子背斜中- 上侏罗统油气储集层与下白垩统盖层组成的储盖组合成藏条件较好,是下一步油气勘探的现实领域。该方法对我国中西部 前陆冲断带广泛发育的断层相关褶皱的研究具有一定的借鉴意义。  相似文献   

福厦线粉喷桩复合地基有限元分析   总被引：6，自引：2，他引：4  

蒋鑫  邱延峻  周成 《工程地质学报》2005,13(1):124-128

结合福建省第一条省内高速铁路福厦线的设计,通过三维Biot固结有限元数值模拟,探讨了粉喷桩处治深厚层 软基的变形特性,并就施工参数、路基参数等对软基沉降的影响进行了参数敏感性分析。其研究成果对工程实践具有一定的 指导意义。  相似文献   

Does the Amati Relation depend on the Luminosity of the GRB＇s Host Galaxy？     

Jing Wang  Jing-Song Deng  Yu-Lei Qiu 《中国天文和天体物理学报》2008,8(3):255-261

In order to test the systematics of the Amati relation, 24 long-duration GRBs with available Eγ,iso, and Ep are separated into two subgroups according to the B-band luminosity of their host galaxies. The Amati relations in the two subgroups are found to be in agreement with each other within the uncertainties. Taking into account of the well established luminosity-metallicity relation of galaxies, no strong evolution of the Amati relation with the GRB's environmental metallicity is implied in this study.  相似文献   

Size-based analysis for the state and heterogeneity of pelagic ecosystems in the northern South China Sea     

Linbin Zhou  Yehui Tan  Liangmin Huang  Xiping Lian  Dajun Qiu  Zhixin Ke 《Journal of Oceanography》2013,69(4):379-393

Analyzing and evaluating the state and heterogeneity of ecosystems are required for ecosystem-based management. The abundance size spectrum is a promising approach for evaluating pelagic ecosystems. To analyze the heterogeneity of pelagic ecosystems in the northern South China Sea (NSCS) in summer, a simplified abundance size spectrum (SASS) was proposed. Picophytoplankton (0.2–2 μm), microphytoplankton (10–160 μm), mesozooplankton (160–2000 μm), and macrozooplankton (505–8,000 μm) were sampled in the NSCS in August 2007, and used to build the SASS. On the basis of the SASS parameters, spatial heterogeneity in pelagic ecosystems was detected, and the study waters were distinctly categorized into the river plume or upwelling-affected area and its adjacent coastal area, the deepwater area, area near the Luzon Strait, and the offshore shelf area. Contrasts of SASS parameters between the eastern and western pelagic ecosystems out of the Pear River estuary demonstrate the fast ecosystem response to the spreading of the Pearl River plume. These results indicate that the SASS could be a good indicator for the state of pelagic ecosystems in the NSCS. In addition, the SASS approach is easily available and labor- and time-saving, thus the SASS could be a useful tool for monitoring and evaluating the state of pelagic ecosystems and their responses to perturbations.  相似文献   

Seismic activity recorded by a single OBS/H near the active Longqi hydrothermal vent at the ultraslow spreading Southwest Indian Ridge (49°39′ E)     

Yunlong Liu  Cai Liu  Lei Qiu  Vera Schlindwein  Haijiang Zhang 《Marine Georesources & Geotechnology》2013,31(2):201-211

ABSTRACT

In this paper, we describe the results of a first pilot experiment of passive seismic monitoring near the active Longqi hydrothermal vent at the Southwest Indian Ridge during Chinese cruise DY115-30. During 102-day experiment, we recorded over 2,000 seismic events on a single ocean bottom seismometer with hydrophone close to the hydrothermal field. We classified these events into the following three classes based on their time–frequency characteristics: (1) volcano tectonic microearthquakes (VTMs); (2) regional earthquakes; (3) short-duration events (SDEs). We preliminarily located the 1,277 VTMs using a single-station location method. Our results revealed hypocenters primarily beneath the axial valley ridge which is about 10?km away from hydrothermal vent and extending to the upper mantle at a depth of 15?km. Two discrete swarms of VTMs occurred during our survey period. The SDEs show a complex frequency characteristics ascribed to clusters of monochromatic waves around different frequencies. This suggests that SDEs result from combination of harmonic waves resonating in fluid-filled pipes and cracks.  相似文献   

安塞坪桥区延长组长9致密油储层预测及有利区优选     

马浪  杜彦军  张治东  惠瑞瑞  王变阳  宋健  许璟  何斌 《西北地质》2022,(1):216-224

针对安塞坪桥区长9油层组致密油储层难以预测、勘探开发有利区不明确、严重制约勘探开发进程等问题,笔者通过对典型取心井岩相、测井相研究,在确定砂岩沉积微相类型及其空间演化的基础上,对砂岩进行横向追踪对比,准确获取单砂体厚度数据,刻画出单砂体展布特征,并结合生产动态情况,优选出致密油勘探开发有利目标区.研究结果表明,研究区致...  相似文献   

小城镇建筑抗震设防问题的探讨   总被引：1，自引：1，他引：0  

铁瑞  郭明珠  王俊  邱钦钦  姜纪果 《震灾防御技术》2009,4(2):215-222

我国小城镇抵御地震的能力非常脆弱,5级以上的地震就会造成很严重的破坏,原因是大多数小城镇的建筑都没有考虑抗震设防。汶川地震的深刻教训告诉我们,规范小城镇建筑、设计和施工,提高小城镇建筑抗震能力,已迫在眉睫。而现有的建筑结构抗震设计规范并不完全适用于小城镇,小城镇的建筑、设计和施工缺乏有效的约束。为此,本文针对我国小城镇建筑抗震设防目标的确定提出了一些意见,总结了小城镇抗震设防存在的问题,并提出了一些可行的提高小城镇建筑抗震能力的建议。  相似文献   

Primary Quantitative Study on Earthquake Damage Extracted from Remote Sensing Imagery——A Case Study of Seismic Damage in the Urban Area of Dujiangyan due to the M_S8.0 Wenchuan Earthquake     

Wang Xiaoqing  Wang Long  Zhang Xihai  Ding Xiang  Qiu Hu  Dong Yanfang  DouAixia  Zhang Feiyu  Liu Zaitao 《中国地震研究》2009,23(4):392-401

The fast developing remote sensing techniques play an increasingly important role in earthquake emergency response, disaster survey and loss estimation. As there is a lack of quantitative studies on seismic damage based on remote sensing, its practicality in seismic disaster management has usually been questioned. The paper introduces the essential quantitative study idea, the concept of the remote sensing seismic damage index (DRS_I RS) and analysis models, demonstrates the seismic damage indices (DG_IC) of buildings obtained from ground surveying and its quantitative relation to DRS_I RS in Dujiangyan city, Sichuan Province, which was destroyed by the 2008 Wenchuan earthquake with M_S8.0. The primary results show that an obvious relationship exists between the DRS_I RS of buildings obtained from the high resolution satellite or aerial remote sensing images and DG_I C or the building collapse ratio obtained through ground survey, which suggests that the quantitative study on seismic damage based on remote sensing will provide an effective method for seismic damage survey and loss estimation.  相似文献