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91.
谷氨酰胺二肽对日本对虾血清生化指标、肝胰腺细胞凋亡及肠粘膜形态的影响 总被引:3,自引:0,他引:3
采用饲养对比试验方法,研究了谷氨酰胺二肽(Gin二肽)对日本对虾血清生化指标、肝胰腺细胞凋亡和肠绒毛的影响及对虾体健康的作用。结果表明,饲喂Gin二肽各组的PO、LSZ、ACP含量均显著(P〈0.05)高于对照组,添加0.5%和1.0%Gin二肽组的SOD和ALP含量也显著(P〈0.05)高于对照组:添加1.0%Gin二肽的TP含量显著(P〈0.05)高于其它各组。血清TP、PA、UN、CHO、PO、LSZ、SOD、ALP、ACP和LDH等各项指标均随Gin二肽添加量的提高而呈现增加趋势。试验建立了流式细胞术检测对虾肝胰腺细胞凋亡率的方法;肝胰腺细胞凋亡率随着日粮Gin二肽添加量的增加而显著降低(P〈0.05)。肠道切片显微观测结果表明,添加1.0%的Gin二肽能显著增加日本对虾肠绒毛高度(P〈0.05)。饲料中添加Gin二肽可显著提高日本对虾血清中的溶菌酶、抗氧化酶及磷酸酶活性,降低肝胰腺细胞凋亡率,增加肠绒毛高度,改善虾体健康状况。 相似文献
92.
It is a conventional method for petroleum prospecting to generally use paraffin hydrocarbon as basic indexes of oil and gas. This conventional geochemical technology, however, shows some limits in the prospecting as paraffin is vulnerable to influences from human and biologic activities. Consequently, BTEX (short for benzene, toluene, ethyl benzene and xylem, which are direct biomarkers) among aromatic hydrocarbon series has been taken into account for the oil and gas prediction. Domestic and foreign study results demonstrate that BTEX is hardly disturbed and can well indicate oil and gas reservoirs. Based on measured data from a South China Sea area, the present authors have used self-developed visual assessment software for petroleum prospecting has been used to process data, strip background anomalies, and outline significant BTEX anomalies. By comparison with stratigraphic profiles of the target area, it is confirmed that BTEX is a good indication of marine oil and gas during the petroleum prospecting. 相似文献
93.
F. Rodriguez Monreal H.J. Villar R. Baudino D. Delpino S. Zencich 《Marine and Petroleum Geology》2009
In the Altiplanicie del Payún area (Neuquen Basin, Argentina), immature source rock sections intruded by up to 600 m thick Tertiary laccoliths show full spectrum maturity aureoles over hundreds of meters from the contacts. Commercial oil accumulations (20–33°API) and oil shows are located along the entire column, both in sandstone/carbonate and fractured igneous reservoirs. A challenging numerical model that included the emplacement of the intrusive bodies, with extreme temperature ranges and unusually short calculation time steps, has been done with the aim to better understand hydrocarbon generation and migration processes related to these thermal anomalies. 相似文献
94.
十屋断陷是断坳叠置的复合盆地,充填了巨厚的断陷地层。其深部地层包括登娄库组、营城组、沙河子组以及火石岭组。在十屋断陷深部沉积了沙河子组-营城组和登娄库组两套烃源岩和良好的储盖层组合;由于断陷构造运动,形成大量的断裂构造和不整合面,构成了油气运移的有效通道,同时还形成有效断裂、断鼻构造圈闭以及不整合圈闭。综合分析认为,十屋断陷深部具有有利油气成藏生储盖组合。主要有下生上储式、自生自储式和上生下储式三种成藏模式。 相似文献
95.
Accumulation of petroleum hydrocarbons and heavy metals in clams (Ruditapes philippinarum) in Jiaozhou Bay, China 总被引:2,自引:0,他引:2
Accumulation and distributions of aliphatic and polyaromatic hydrocarbons (PAHs) and heavy metals were measured in tissues
of the clam Ruditapes philippinarum collected from 5 sites in Jiaozhou Bay, Qingdao, China. The concentrations of total aliphatic hydrocarbon and PAHs ranged
from 570 to 2 574 ng/gdw (gram dry weight) and from 276 to 939 ng/gdw, in the most and least polluted sites, respectively.
The bio-accumulation of hydrocarbons and PAHs in the clams appeared to be selective. Aliphatic hydrocarbons were predominantly
represented by short chain (<nC23) n-alkanes, suggesting that petroleum hydrocarbons were likely the major contamination source. The selective uptake of 3 and
4 ring PAHs, such as naphthalene, fluorene, phenanthrene, fluoranthene and pyrene, by the clams was probably related to the
physiological and bio-kinetic processes that were energetically favorable for uptake of compounds with fewer rings. Accumulation
of the metals Cd, Cu, Zn, Pb, Cr, Hg, and As in the clam tissues also showed high variability, ranging from 0.043 to 87 μg/gdw.
Among the 7 detected metals, Zn, Cd, Cu, and As had a particularly high potential of accumulation in R. philippinarum. In general, a positive correlation was found between the tissue concentrations and sediment concentrations of hydrocarbons
and of some metals. Our study suggests that moderate contamination with polyaromatic hydrocarbons, and low to moderate contamination
with metals, currently exists for clam R. philippinarum in Jiaozhou Bay, in comparison with other regional studies. A long-term monitoring program is certainly needed for assessment
of the potential ecological influence and toxicity of these contaminants of R. philippinarum in Jiaozhou Bay. 相似文献
96.
A field work has been carried out to identify the occurrence of oil and oil products pollution in mangrove sediment from Red Sea of Yemen. The concentration of total petroleum hydrocarbons is from 700ng/g at Kamaran Island station to 400 ng/g at Al-Hodiedah station, and the total organic carbon (TOC) in samples ranges from 0. 07% at Dhubab station to 0. 03% at Kamaran Island station. This pollution is as a result of localized oil pollution and/or heavy ship traffic in the Red Sea and Gulf of Aden. 相似文献
97.
石油污染土壤对向日葵生长的影响 总被引:7,自引:0,他引:7
以美国油料向日葵G101为材料,通过田间试验,研究了土壤石油污染质量浓度为10 000 mg/kg时,对向日葵生理性状、产量性状、农艺性状及籽仁质量的影响。结果表明:石油污染土壤对向日葵群体叶面指数从苗期至成熟期均有显著影响。葵盘直径、茎秆直径、株高、叶片数、百粒重和生物量分别缩小或降低10.7%、7.4%、7.2%、10.0%、16.7%和21%;空秕率提高2.4倍;对根系与地上部分的抑制作用无显著差异。该污染浓度下石油对向日葵发芽出苗率,籽仁中粗脂肪和粗蛋白质含量无显著影响;葵盘腐烂病发生率、分枝发生率有所提高。 相似文献
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