Different Cultures and Different Fates—On Cultural Meanings of “Bluest Eye” in Morrison'sThe Bluest Eye

The Bluest Eye is Toni Morrison’s first novel.After its publication,it receives many criticisms.This article aims to ana lyze Pecola and Claudia’s understandings about black culture,then to clarify that different interpretations of the very name"the bluest eye"lead to different fates.With different visions of the black heritage,Pecola and Claudia have different perception of the world and thus have widely divergent outcomes in the painful circumstances.

SYNTHESES AND SPECTRA OF HETEROPOLY BLUES OF DOUBLE 2:17 MOLYBDOPHOSPHATES LANTHANIDE COMPLEXES

The present paper reports eight heteropoty blues of double 2:17 motybdophosphates tanthanide comptexes with tacunary Dawson structure, i.e., K_(17)H_2[Ln(P_2Mo_2~ⅤMo_(15)~ⅥO_(16))_2], nH_2O and K_(17)H_4 [Ln(P_2Mo~Ⅴ_4Mo_(13)~ⅥO_(61))_2], nH_2O(Ln=La, Pr, Sm, Yb). They were characterized by etementat anatyses, potentiometric titration, IR, UV, potarography, cyclic vottammetry, X-ray photoelectron spectra, X-ray powder diffraction, thermat analyses and ESR. The results show that the properties of these heteropoty btues are different from those of heteropoty blues with saturated Dawson structure and other tacunary series. They are more stabte than their parent heteropoty acids in aqueous sotution and have the abitity of anti-base decomposition.

沉稳绅士,传说中的BLUES魔术师!

提起BLUES,很多人会自然而然地想到一头长发、极具绅士风度的他,其经典作品不胜枚举.在他的演绎下,传统的BLUES越发灵动,既可唯美动人、也可激情四射,为我们带来非同一般的音乐享受,这便是中国著名贝司演奏家--张岭. 张岭,中国著名的贝司演奏家,从最早的崔健乐队、节奏之犬至今,他的每一段旋律都在影响着一代又一代的年轻乐手,在我们为他的精湛技艺所惊叹的同时,出色的演唱也无时无刻不在打动着聆听到他那魔术般BLUES音乐的人.1989年张岭只身一人来到澳大利亚进行音乐学习与深造,可以说这几年中所经历的一切,对他的音乐与演奏有着深远的影响.……

千万像素的BLUES风情 三星蓝调NV10

想追求个性,想让自己变得时尚,想拥有优雅的风范,想……除了自身形象之外,搭配一个漂亮的数码相机也同样重要。但是想满足这样的要求谈何容易?要知道它们绝大部分都具有较大的相似性,一般都只是在像素、价格上进行比拼,少有让人眼前一亮、个性十足的产品出现。三星的蓝调系列DC恰好就是为满足消费者的这类需求而着力打造的产品,将拍摄性能、视觉体验和娱乐功能完美地结合在一起,魅力十足,并一波一波地向市场逐渐推广。其中,NV10是第二款推向市场的蓝调DC,除了在外形设计和功能操作上让我们享受到完全不同于其他DC的别样体验之外,更搭载千万像素CCD带来视觉盛宴。

Cost of Living Blues

Chinese from all walks of life face the bite of inflation as the country’s consumer price index(CPI) soars DATA of the National Bureau of Statistics (NBS) show the country’s consumer price index(CPI),a broad measure of inflation, grew 5.3 percent in April,after recording a 32-month-high growth of 5.4 percent in

Festival Blues

LIKE Christmas in the West, Chinese New Year, or Spring Festival, remains the most important social and economic holiday in China. But a survey conducted by Horizon Key Research at the end of 2012. two months before Chinese New Year, which fell on Febru- ary 10 this year. indicated that over 70 percent of young people in China feel stressed about the celebration. Due to a clash between centuries-old traditions and modern life. China＇s young people have increas- ingly complex feelings about Spring Festival, and now observe and spend the holiday in a very different man- her than previous generations.

Isomerization and Antiacidolysis Properties of Molybdic Heteropoly Blues with Keggin Structure

For eight kinds of acidic potassium salts of hetcropoly blues which have not been reported in literature,the isomeri/.ation reaction in solution for these two-and four-electron hcteropoly blue solids were investigated by means of polarograms,cyclic voltammetry,31P NMR and X-ray diffraction methods.The heteropolynier of PMo12 and AsMo12 converte to their β-isomers during isomerization reaction which were found to have antiacidolysis property.

改良BLUE方案肺超声评分在机械通气患者中的应用价值

目的比较改良BLUE方案肺超声评分与传统区域评分法在机械通气患者中的应用优劣,探讨改良BLUE方案与序贯器官衰竭评估(SOFA)评分、氧合指数(OI)的相关性及其对机械通气患者预后评估的价值。方法选择南通大学第二附属医院急诊医学科行机械通气的危重症患者66例,其中男性45例,女性21例;年龄35~95岁,平均年龄72.11岁;病程2~37 d,平均病程12.03 d;疾病类型:肺炎、感染性休克等感染相关19例,心力衰竭16例,慢性阻塞性肺疾病急性发作呼吸衰竭15例,心肺复苏后11例,间质性肺炎2例,中毒2例,外伤1例。根据患者的转归情况(28 d生存或死亡)分为好转组28例与死亡组38例。分别使用改良BLUE方案、4分区、6分区、8分区及12分区评分方法对患者进行肺部超声检查,以12分区评分为对照,分别比较改良BLUE方案、4分区、6分区、8分区超声评分与12分区评分结果的相关性。记录各检查方案检查时间,比较各评分法耗时差异。分析改良BLUE方案与SOFA评分和OI的相关性。比较两组改良BLUE方案肺超声评分差异。结果在机械通气患者中,改良BLUE方案、4分区、6分区、8分区超声评分结果,均与12分区法评分结果呈正相关(r=0.98、0.94、0.96、0.95,P均<0.05),其中改良BLUE方案肺超声评分与12分区评分相关性最高。改良BLUE方案、4分区、6分区、8分区及12分区肺超声检查操作时间分别为(5.86±0.76)min、(4.86±0.71)min、(6.79±0.88)min、(8.18±1.02)min、(11.79±1.45)min,改良BLUE方案较6分区、8分区及12分区操作时间短(P均<0.05)。改良BLUE方案肺超声评分与OI呈负相关,与SOFA评分呈正相关(r=-0.42、0.25)。好转组与死亡组改良BLUE方案肺超声评分平均值分别为(12.04±5.87)分、(15.79±5.94)分。好转组改良BLUE方案肺超声评分明显低于死亡组,差异有统计学意义(P<0.05)。结论在机械通气危重症患者中,使用改良BLUE方案肺超声评分具有准确度高、耗时短的优势,更适宜在急诊环境中对机械通气危重症患者进行快速病情评估。改良BLUE方案肺超声评分对机械通气患者病情严重程度及预后有一定指导价值。

Advances in Triboelectric Nanogenerators for Blue Energy Harvesting and Marine Environmental Monitoring

Blue energy,which includes rainfall,tidal current,wave,and water-flow energy,is a promising renewable resource,although its exploitation is limited by current technologies and thus remains low.This form of energy is mainly harvested by electromagnetic generators(EMGs),which generate electricity via Lorenz force-driven electron flows.Triboelectric nano genera tors(TENGs)and TENG networks exhibit superiority over EMGs in low-frequency and high-entropy energy harvesting as a new approach for blue energy harvesting.A TENG produces electrical outputs by adopting the mechanism of Maxwell’s displacement current.To date,a series of research efforts have been made to optimize the structure and performance of TENGs for effective blue energy harvesting and marine environmental applications.Despite the great progress that has been achieved in the use of TENGs in this context so far,continuous exploration is required in energy conversion,device durability,power management,and environmental applications.This review reports on advances in TENGs for blue energy harvesting and marine environmental monitoring.It introduces the theoretical foundations of TENGs and discusses advanced TENG prototypes for blue energy harvesting,including TENG structures that function in freestanding and contact-separation modes.Performance enhancement strategies for TENGs intended for blue energy harvesting are also summarized.Finally,marine environmental applications of TENGs based on blue energy harvesting are discussed.

Flavonoid extracts from chrysanthemum with appropriate anthocyanins turn blue when exposed to iron ions

Although some species that accumulate only cyanidin(Cy)in nature can produce blue flowers through iron ions,there has been no evidence of blue chrysanthemums being generated in this manner.This study revealed that flavonoid extracts from the ray florets of the chrysanthemum cultivar‘Wandai Fengguang’turned blue when exposed to Fe^(3+).Samples that could turn blue were labeled as CB(Cy-determined blue flowers),while samples that did not turn blue were labeled as CN(Cy-determined non-blue flowers).After a series of experiments,a stable screening system was established using flavonoid extracts containing NaAc buffer at pH 5.5 and a total anthocyanin concentration(TAC)of 30 μmol·L^(-1),and the addition of Fe^(3+)from 0 to 0.25 μmol·L^(-1)allowed for the selection of five CB samples from 39 chrysanthemum cultivars.All five CB samples exhibited flower color phenotypes that belonged to Cluster-I with redness(a*)values ranging from 29.03 to 45.99,yellowness(b*)values from-11.31 to 3.77,and brightness(L*)values from 29.07 to 45.99.Additionally,the ratio of TAC to total luteolin concentration(TLC)was found to be a critical factor for distinguishing between CB and CN samples.To realize the desired blue hue in the flavonoid extracts with the participation of Fe^(3+),a TAC to TLC ratio of 2.25 and above is required.Moreover,the protoplasts and ray florets of CB samples that turned blue with the involvement of Fe^(2+)showed great potential for cultivating blue chrysanthemums through ferric-anthocyanin chelate.Overall,this study reveals that blue flowers can be cultivated through the increase in the iron ion concentration,combined with the accumulation of Cy.

Achieving a superior Na storage performance of Fe-based Prussian blue cathode by coating perylene tetracarboxylic dianhydride amine

Fe-based Prussian blue(Fe-PB)cathode material shows great application potential in sodium(Na)-ion batteries due to its high theoretical capacity,long cycle life,low cost,and simple preparation process.However,the crystalline water and vacancies of Fe-PB lattice,the low electrical conductivity,and the dissolution of metal ions lead to limited capacity and poor cycling stability.In this work,a perylene tetracarboxylic dianhydride amine(PTCDA)coating layer is successfully fabricated on the surface of Fe-PB by a liquid-phase method.The aminated PTCDA(PTCA)coating not only increases the specific surface area and electronic conductivity but also effectively reduces the crystalline water and vacancies,which avoids the erosion of Fe-PB by electrolyte.Consequently,the PTCA layer reduces the charge transfer resistance,enhances the Na-ion diffusion coefficient,and improves the structure stability.The PTCA-coated Fe-PB exhibits superior Na storage performance with a first discharge capacity of 145.2 mAh g^(−1) at 100 mA g^(−1).Long cycling tests exhibit minimal capacity decay of 0.027%per cycle over 1000 cycles at 1 A g^(−1).Therefore,this PTCA coating strategy has shown promising competence in enhancing the electrochemical performance of Fe-PB,which can potentially serve as a universal electrode coating strategy for Na-ion batteries.

Multifunctional catalytic sites regulation of atomic-scale iridium on orthorhombic-CoSe_(2)for high efficiency dual-functional alkaline hydrogen evolution and organic degradation

The earth-abundant and high-performance catalysts are crucial for commercial implementation of hydrogen evolution reaction(HER).Herein,a multifunctional site strategy to construct excellent HER catalysts by incorporating iridium(Ir)ions on the atomic scale into orthorhombic-CoSe2(Ir-CoSe_(2))was reported.Outstanding hydrogen evolution activity in alkaline media such as a low overpotential of 48.7 mV at a current density of 10 mA cm^(-2)and better performance than commercial Pt/C catalysts at high current densities were found in the Ir-CoSe_(2) samples.In the experiments and theoretical calculations,it was revealed that Ir enabled CoSe_(2)to form multifunctional sites to synergistically catalyze alkaline HER by promoting the adsorption and dissociation of H_(2)O(Ir sites)and optimizing the binding energy for H^(*)on Co sites.It was noticeable that the electrolytic system comprising the Ir-CoSe_(2)electrode not only produced hydrogen efficiently via HER,but also degraded organic pollutants(Methylene blue).The cell voltage of the dual-function electrolytic system was 1.58 V at the benchmark current density of 50 mA cm^(-2),which was significantly lower than the conventional water splitting voltage.It was indicated that this method was a novel strategy for designing advanced HER electrocatalysts by constructing multifunctional catalytic sites for hydrogen production and organic degradation.

Progress on Transition Metal Ions Dissolution Suppression Strategies in Prussian Blue Analogs for Aqueous Sodium-/Potassium-Ion Batteries

Aqueous sodium-ion batteries(ASIBs)and aqueous potassium-ion batteries(APIBs)present significant potential for large-scale energy storage due to their cost-effectiveness,safety,and environmental compatibility.Nonetheless,the intricate energy storage mechanisms in aqueous electrolytes place stringent require-ments on the host materials.Prussian blue analogs(PBAs),with their open three-dimensional framework and facile synthesis,stand out as leading candidates for aqueous energy storage.However,PBAs possess a swift capacity fade and limited cycle longevity,for their structural integrity is compromised by the pronounced dis-solution of transition metal(TM)ions in the aqueous milieu.This manuscript provides an exhaustive review of the recent advancements concerning PBAs in ASIBs and APIBs.The dissolution mechanisms of TM ions in PBAs,informed by their structural attributes and redox processes,are thoroughly examined.Moreover,this study delves into innovative design tactics to alleviate the dissolution issue of TM ions.In conclusion,the paper consolidates various strategies for suppressing the dissolution of TM ions in PBAs and posits avenues for prospective exploration of high-safety aqueous sodium-/potassium-ion batteries.

Experimental and computational optimization of Prussian blue analogues as high-performance cathodes for sodium-ion batteries:A review

In this review,we discuss the electrochemical properties of Prussian blue(PB)for Na^(+)storage by combining structural engineering and electrolyte modifications.We integrated experimental data and density functional theory(DFT)in sodium-ion battery(SIB)research to refine the atomic arrangements and crystal lattices and introduce substitutions and dopants.These changes affect the lattice stability,intercalation,electronic and ionic conductivities,and electrochemical performance.We unraveled the intricate structure-electrochemical behavior relationship by combining experimental data with computational models,including first-principles calculations.This holistic approach identified techniques for optimizing PB and Prussian blue analog(PBA)structu ral properties for SIBs.We also discuss the tuning of electrolytes by systematically adjusting their composition,concentration,and additives using a combination of molecular dynamics(MD)simulations and DFT computations.Our review offers a comprehensive assessment of strategies for enhancing the electrochemical properties of PB and PBAs through structural engineering and electrolyte modifications,combining experimental insights with advanced computational simulations,and paving the way for next-generation energy storage systems.

Impact of Alcian blue and periodic acid Schiff expression on the prognosis of gastric signet ring cell carcinoma

BACKGROUND The Alcian blue(AB)and periodic acid Schiff(PAS)stains are representative mucus markers in gastric signet ring cell carcinoma(SRCC).They are low-cost special staining methods used to detect acidic mucus and neutral mucus,respectively.However,the clinical importance of the special combined AB and PAS stain is unclear.AIM To investigate AB expression,PAS expression and the AB-to-PAS(A/P)ratio in gastric SRCC patients and to assess patient prognosis.METHODS Paraffin-embedded sections from 83 patients with gastric SRCC were stained with AB and PAS,and signet ring cell positivity was assessed quantitatively.Immuno-histochemical staining for Ki67,protein 53(P53)and human epidermal growth factor receptor 2(HER2)was performed simultaneously.The cancer-specific survival(CSS)rate was estimated via Kaplan-Meier analysis.Cox proportional hazards models were used for univariate and multivariate survival analyses.RESULTS Kaplan-Meier survival analysis revealed that the 3-year CSS rate was significantly greater in the high-PAS-expression subgroup than in the low-PAS-expression subgroup(P<0.001).The 3-year CSS rate in the A/P≤0.5 group was significantly greater than that in the A/P>0.5 group(P=0.042).Univariate Cox regression analysis revealed that the factors affecting prognosis included tumor diameter,lymph node metastasis,vessel carcinoma embolus,tumor stage,the A/P ratio and the expression of Ki67,P53 and the PAS.Cox multivariate regression analysis confirmed that low PAS expression[hazard ratio(HR)=3.809,95%confidence interval(CI):1.563-9.283,P=0.003]and large tumor diameter(HR=2.761,95%CI:1.086-7.020,P=0.033)were independent risk factors for poor prognosis.CONCLUSION A/P>0.5 is potentially a risk factor for prognosis,and low PAS expression is an independent risk factor in the prognosis of gastric SRCC.PAS expression and the A/P ratio could help in predicting the clinical prognosis of patients with SRCC.

基于红(R)绿(G)蓝(B)三波段的典型港湾透明度反演研究

基于卫星遥感的透明度(Secchi depth,SD)反演方法已经在大洋、近海、湖泊等不同水体开展了广泛应用。富营养化河口港湾等水体具有水域面积小且受陆地影响大等特点,并且在此类水体开展环境监测具有时效性要求。受时间空间分辨率以及云层覆盖、大气校正等影响,基于卫星遥感方法在河口港湾等小水域进行透明度反演会受到一定的应用限制,因此在此类特征水体建立一种高效便捷的透明度反演方法作为卫星遥感方法的有益补充就十分迫切。本研究尝试通过无人机和智能手机应用程序HydroColor APP搭载的普通光学相机构建基于红(red,R)绿(green,G)蓝(blue,B)三波段的象山港透明度反演方法。结果表明,无人机和HydroColor的红蓝波段比值(R/B)和红绿波段比值(R/G)与透明度具有显著负相关,相关系数R为–0.88~–0.93(n=16,P<0.001)。根据相关性分析结果构建透明度反演模型并基于独立数据库对模型进行精度评估。结果显示,(1)指数反演模型要优于线性经验模型,(2)基于R/G反演模型要优于R/B模型,(3)HydroColor反演模型要优于无人机反演模型。通过以上结果分别构建基于无人机DJI-R/G和HydroColor-R/G最优透明度指数反演模型。DJI-R/G模型平均相对误差和均方根误差为29%和0.3 m,HydroColor-R/G模型为21.9%和0.27 m。以上结果表明,通过无人机和手机获取RGB信息均可用于对象山港透明度进行反演。该方法的建立为快速便捷开展河流港湾等水体的水质监测和赤潮防控提供了新的技术支持。

Acquired methemoglobinemia in a third trimester puerpera and her premature infant with sodium nitrite poisoning:A case report

BACKGROUND The common cause of sodium nitrite poisoning has shifted from previous accidental intoxication by exposure or ingestion of contaminated water and food to recent alarming intentional intoxication as an employed method of suicide/exit.The subsequent formation of methemoglobin(MetHb)restricts oxygen transport and utilization in the body,resulting in functional hypoxia at the tissue level.In clinical practice,a mismatch of cyanotic appearance and oxygen partial pressure usually contributes to the identification of methemoglobinemia.Prompt recognition of characteristic mismatch and accurate diagnosis of sodium nitrite poisoning are prerequisites for the implementation of standardized systemic interventions.CASE SUMMARY A pregnant woman was admitted to the Department of Critical Care Medicine at the First Affiliated Hospital of Harbin Medical University due to consciousness disorders and drowsiness 2 h before admission.Subsequently,she developed vomiting and cyanotic skin.The woman underwent orotracheal intubation,invasive mechanical ventilation(IMV),and correction of internal environment disturbance in the ICU.Her premature infant was born with a higher-than-normal MetHb level of 3.3%,and received detoxification with methylene blue and vitamin C,supplemental vitamin K1,an infusion of fresh frozen plasma,as well as respiratory support via orotracheal intubation and IMV.On day 3 after admission,the puerpera regained consciousness,evacuated the IMV,and resumed enteral nutrition.She was then transferred to the maternity ward 24 h later.On day 7 after admission,the woman recovered and was discharged without any sequelae.CONCLUSION MetHb can cross through the placental barrier.Level of MetHb both reflects severity of the sodium nitrite poisoning and serves as feedback on therapeutic effectiveness.

In vivo pilot study into superficial microcirculatory characteristics of colorectal adenomas using novel high-resolution magnifying endoscopy with blue laser imaging

BACKGROUND No studies have yet been conducted on changes in microcirculatory hemody-namics of colorectal adenomas in vivo under endoscopy.The microcirculation of the colorectal adenoma could be observed in vivo by a novel high-resolution magnification endoscopy with blue laser imaging(BLI),thus providing a new insight into the microcirculation of early colon tumors.AIM To observe the superficial microcirculation of colorectal adenomas using the novel magnifying colonoscope with BLI and quantitatively analyzed the changes in hemodynamic parameters.METHODS From October 2019 to January 2020,11 patients were screened for colon adenomas with the novel high-resolution magnification endoscope with BLI.Video images were recorded and processed with Adobe Premiere,Adobe Photoshop and Image-pro Plus software.Four microcirculation parameters:Microcirculation vessel density(MVD),mean vessel width(MVW)with width standard deviation(WSD),and blood flow velocity(BFV),were calculated for adenomas and the surrounding normal mucosa.RESULTS A total of 16 adenomas were identified.Compared with the normal surrounding mucosa,the superficial vessel density in the adenomas was decreased(MVD:0.95±0.18 vs 1.17±0.28μm/μm2,P<0.05).MVW(5.11±1.19 vs 4.16±0.76μm,P<0.05)and WSD(11.94±3.44 vs 9.04±3.74,P<0.05)were both increased.BFV slowed in the adenomas(709.74±213.28 vs 1256.51±383.31μm/s,P<0.05).CONCLUSION The novel high-resolution magnification endoscope with BLI can be used for in vivo study of adenoma superficial microcirculation.Superficial vessel density was decreased,more irregular,with slower blood flow.