Geochemistry, mineral paragenesis and geothermal conditions of oreforming fluids from the Ain El Bey Cu–Fe deposit: potential occurrence of native gold and precious metal traces (North African orogenic belt, Northern Tunisia)

The Ain El Bey abandoned mine, in North-West Tunisia, fits into the geodynamic context of the European and African plate boundary. Ore deposit corresponds to veins and breccia of multiphase Cu–Fe-rich mineralization related to various hydrothermal fluid circulations. Petromineralogical studies indicate a rich mineral paragenesis with a minimum of seven mineralization phases and, at least, six pyrite generations. As is also the case for galena and native silver, native gold is observed for the first time as inclusion in quartz which opens up, thus, new perspectives for prospecting and evaluating the potential for noble metals associated with the mineralization. Scanning Electron Microscope--Energy Dispersive Spectroscopy and Transmission electron microscopy analyses show, in addition, a large incorporation of trace elements, including Ag and Au, in mineral structures such as fahlores(tetrahedrite-tennantite) and chalcopyrite ones. The mineral/mineral associations, used as geothermometers, gave estimated temperatures for the mineralizing fluids varying from 254 to 330 ℃ for phase Ⅲ, from 254 to 350 ℃ for phase Ⅳ, and from 200 to 300 ℃ for phases Ⅴ and Ⅵ. The seventh and last identified mineralization phase, marked by a deposit of native gold, reflects a drop in the mineralizing fluid’s temperature(< 200 ℃) compatible with boiling conditions. Such results open up perspectives for the development of precious metal research and the revaluation of the Cu–Fe ore deposit at the Ain El Bey abandoned mine, as well as at the surrounding areas fitting in the geodynamic framework of the Africa-Europe plate boundary.

Native and prosthetic septic arthritis in a university hospital in Saudi Arabia:A retrospective study

BACKGROUND Septic arthritis,whether native or prosthetic,poses a significant challenge in clinical practice due to its potentially devastating consequences.Despite its clinical importance,there remains a dearth of comprehensive studies and standardized diagnostic criteria,particularly in the Kingdom of Saudi Arabia.AIM To investigate the epidemiology,microbiological profiles,and clinical characteristics of native and prosthetic septic joints in the Saudi Arabian population.METHODS Medical records of patients diagnosed with septic arthritis between January 1,2015,and December 31,2022,were retrospectively reviewed.Data regarding patient demographics,clinical presentation,microbiological cultures,treatment modalities,and outcomes were analyzed.RESULTS In a retrospective review of 52 cases of septic arthritis,a balanced gender distribution was observed(1:1 ratio),with the knee being the most commonly affected joint(80.8%).Methicillin-resistant Staphylococcus aureus predominated in native joints(24.2%),while Brucella spp.was more prevalent in prosthetic joints(21.1%).Joint preservation was achieved in most cases(84.6%),with no significant difference in clinical features between native and prosthetic joints.However,certain comorbidities were more common in native joint cases,including renal impairment(P=0.002),hemodialysis(P=0.004),heart disease(P=0.013),and chronic liver disease(P=0.048).At the same time,osteoarthritis was more prevalent in prosthetic joint cases(P=0.013).Vancomycin was the most frequently used antibiotic(26.9%),and most patients received antibiotics before joint aspiration(57.7%).Surgical intervention,predominantly arthrotomy,was required in most cases(32.7%).Notably,a significant association was found between joint type and mortality(odds ratio=0.587,P=0.048),as well as the Charlson comorbidity index and mortality(P=0.001).CONCLUSION This study highlighted distinctive microbiological profiles and etiological factors in septic arthritis cases in the Saudi Arabian population.

Application of Artificial Insemination in Selective Breeding of Native Beef Cattle in Wenzhou

[Objective]The paper was to improve the quality and growth rate of native yellow cattle in Wenzhou.[Method]Three groups of cattle were subjected to artificial insemination using frozen semen from Wagyu bull.The groups consisted of 20 native yellow cattle,20 Angus catle,and 20 Luxi yellow cattle.The heifers were subsequently evaluated for body size and body weight,and underwent treatment with estrus synchronization,artificial insemination,and early pregnancy diagnosis.[Result]The mean body size and body weight of native yellow cattle were found to be significantly lower than those of Angus cattle and Luxi yellow cattle(P<0.05).The estrus synchronization rate and mating rate of native yellow cattle were both 100%,while the corresponding rates for Angus cattle and Luxi yellow cattle were 90%and 95%,respectively.The ultrasound examination conducted on the 32m day following the mating revealed a distinct image of gestation sac,which,when considered alongside the findings of the rectal examination,may be indicative of pregnancy.The conception rates were 75%,72%,and 74%for native yllow cattle,Angus cattle,and Luxi yellow cattle,respectively.[Conclusion]The reproductive performance of native beef cattle is relatively superior.

React Native的跨平台移动应用开发实践

随着智能手机的普及,移动应用成了连接用户与服务的重要渠道。然而,面对iOS和Android等多个平台,开发者不得不重复开发同一应用以适配不同系统,这不仅消耗了大量的资源,也延长了产品的上市时间。React Native作为一种跨平台移动应用开发框架,允许开发者使用Java Script编写应用,一次编码便可在多个平台上运行。本文通过实践案例分析了使用React Native进行跨平台移动应用开发的效率和成本效益,探讨了其在解决平台异质性问题上的有效性,并对比了React Native与其他跨平台框架的优势。结果表明,基于React Native的跨平台开发不仅能够显著提高开发效率,降低开发成本,而且还能提供与原生应用接近的用户体验,为移动应用开发提供了一种高效的解决方案。

基于React Native的用户交互设计

研究旨在探讨如何在基于React Native的跨平台应用开发中进行有效的人机交互设计。随着移动应用市场的持续扩大,跨平台开发框架(例如,React Native)提供了一种高效的方式来构建应用,但其成功与否往往取决于用户体验的质量。研究重点讨论了利用React Native的特性和工具来设计具有优秀人机交互的跨平台应用,通过实际案例和技术细节进行了深入探讨。

Native-speakerism in China:An Investigation of Foreign Language Education Policy and Learners’Attitudes

With the development of globalization,the use of English is no longer restricted to native speaker(NS)but also widely spread to non-native speaker(NNS).The importance of English learning is also acknowledged by Expanding and Outer Circle,and English as a foreign language(EFL)education plays a significant role in China’s education.Admitting the fact that non-native English teachers(NNESTs)take up a large proportion of English teachers,English language teaching(ELT)is still greatly influenced by native-speakerism.This research aims to investigate language ideologies reflected in Chinese foreign language education policy(FLEP)at higher education level,and Chinese English learners’attitudes towards native-speakerism and English teachers.A mixed method of policy analysis and survey is adopted in this research.After conducting analysing two FLEPs in higher education level,it is found that linguistic instrumentalism is the prominent language ideology,although native-speakerism and standard English ideology is implicitly demonstrated.Questionnaire is used to investigate 58 Chinese English learners’attitudes,revealing that most participants do not demonstrate bias towards either NESTs or NNESTs.Instead,the strengths and weaknesses of both NEST and NNEST are identified,though participants adhere to native-speakerism in terms of English variety.Overall,English learner’s attitudes are consistent with language ideologies in FLEPs.This research may provide implications for future studies on addressing native-speakerism in Chinese FLEPs,as well as relationship of students’attitudes and language policies.

Exploring Native-speakerism in EFL Textbooks in China

At present,in China,most EFL textbooks are dominated by inner circle norms.This dominance may fail to address the increasing need of developing students’multilingual negotiating abilities outside the inner-circle countries(Canagarajah,2006a),which makes students unprepared for the globalized context and postmodern discourses.Facing the tendency,how hegemony position of inner circle norms dominate English textbooks in the Chinese EFL classroom is analyzed here and some pedagogical implications to cultivate students’multilingual awareness are drawn so as to develop their multilingual competence in face of nativespeakerism surrounding the teaching materials and ELT pedagogy.

心脏磁共振节段性Native T1和组织追踪技术在肥厚型心肌病和高血压性心脏病中的鉴别价值

目的:探讨心脏磁共振节段性Native T1和组织追踪技术在肥厚型心肌病(HCM)和高血压性心脏病(HHD)中的鉴别诊断效能。方法:回顾性纳入2018年10月至2022年7月温州医科大学附属第五医院收治确诊的HCM患者80例,HHD患者25例。所有受检者的电影和T1 mapping图像经CVI42软件后处理,获得常规左心室功能参数、左心室心肌应变参数、整体及各节段Native T1值。对HCM、HHD患者的各心脏磁共振参数进行组间比较,采用单因素和多因素Logistic回归分析筛选预测因子并进行建模分析,采用受试者工作特征(ROC)曲线及曲线下面积(AUC)评估参数鉴别效能。结果:与HCM患者相比,HHD患者男性更多(P=0.048),吸烟者更多(P=0.032);在心脏磁共振常规左心室参数中,与HHD患者相比,HCM患者的左心室射血分数(LVEF)、左心室舒张末期最大室壁厚度(LVMWT)增大更明显,钆对比剂延迟强化(LGE)阳性率更高(P<0.001),而舒张末期容积指数(LVEDVI)和收缩末期容积指数(LVESVI)较低(P<0.01);HCM患者的左心室整体Native T1、节段1、7、8、9、12、16 Native T1、3D径向应变(GRS)和3D周向应变(GCS)均高于HHD患者(P<0.05)。单因素及多因素Logistic回归分析显示3D GCS(OR=0.68,95%CI=0.48~0.95,P=0.025)和节段8 Native T1(OR=1.04,95%CI=1.00~1.07,P=0.029)是HCM鉴别HHD的预测因子,ROC曲线结果显示3D GCS、节段8 Native T1及二者联合模型的AUC值分别为0.751、0.779、0.925,灵敏度分别为86.67%、71.62%、84.06%,特异度分别为63.16%、82.61%、88.89%,其中联合参数模型的鉴别效能最高(P<0.05)。结论:节段性Native T1和组织追踪技术在HCM和HHD的鉴别诊断中有重要价值,其中节段8 Native T1和3D GCS是HCM鉴别HHD的预测因子,且二者联合模型的鉴别诊断价值最高。

New native tissue repair for pelvic organ prolapse:Medium-term outcomes of laparoscopic vaginal stump-round ligament fixation

BACKGROUND Laparoscopic sacrocolpopexy for pelvic organ prolapse(POP)is a new and widely used approach;however,ever since the United States Food and Drug Administration warned against the use of surgical mesh,repairs performed using patients’tissues[i.e.native tissue repair(NTR)]instead of mesh have attracted much attention.At our hospital,laparoscopic sacrocolpopexy(the Shull method)was introduced in 2017.However,patients with more severe POP who have a long vaginal canal and overextended uterosacral ligaments may not be candidates for this procedure.AIM To validate a new NTR treatment for POP,we examined patients undergoing laparoscopic vaginal stump–round ligament fixation(the Kakinuma method).METHODS The study patients were 30 individuals with POP who underwent surgery using the Kakinuma method between January 2020 and December 2021 and who were followed up for>12 mo after surgery.We retrospectively examined surgical outcomes for surgery duration,blood loss,intraoperative complications,and incidence of recurrence.The Kakinuma method involves round ligament suturing and fixation on both sides,effectively lifting the vaginal stump after laparoscopic hysterectomy.RESULTS The patients’mean age was 66.5±9.1(45-82)years,gravidity was 3.1±1.4(2-7),parity was 2.5±0.6(2-4)times,and body mass index was 24.5±3.3(20.9-32.8)kg/m2.According to the POP quantification stage classification,there were 8 patients with stage Ⅱ,11 with stage Ⅲ,and 11 with stage Ⅳ.The mean surgery duration was 113.4±22.6(88-148)min,and the mean blood loss was 26.5±39.7(10-150)mL.There were no perioperative complications.None of the patients exhibited reduced activities of daily living or cognitive impairment after hospital discharge.No cases of POP recurrence were observed 12 mo after the operation.CONCLUSION The Kakinuma method,similar to conventional NTR,may be an effective treatment for POP.

Genetic Screening of Halothane Gene on Selected Philippine Native Pig Herds

The establishment of nucleus herds (NHs) of Native Pigs (NPs) at various R&D stations in the Philippines is currently being undertaken for food security and genetic conservation advocacy. Marker-assisted selection (MAS) is being utilized to identify individuals carrying favorable alleles of genes associated with production traits and screen out genetic defects (GD) for breeding purposes. Porcine Stress Syndrome (PSS) caused by a mutation in Halothane (HAL) gene is a GD frequently found in commercial breeds that when expressed, causes pale, soft, exudative (PSE) meat. PSE is inferior quality meat undesirable in the market causing economic losses to the swine industry. Thus, this study was conducted to screen the HAL gene through mutagenically separated-polymerase chain reaction (MSPCR) in selected NP herds and assessed its repeatability in local breeds. Results showed that out of 577 screened individuals, 543 (94.11%) were normal (NN), 0 (0%) were homozygous mutant (nn) and 34 (5.89%) were heterozygous carriers (Nn). Therefore, the optimized PSS screening protocol using MSPCR is also applicable to local breeds. As such, the availability of genetic tests for PSS could be useful in improving the Philippine NPs breeding selection and inhibiting or eliminating PSS mutant incidence within its nucleus herd.

Assessment of the Quality of Frozen-Thawed Semen or Epididymal Sperm in Three Native Vietnamese Pig Breeds

Our aim was to evaluate the quality of ejaculated and epididymal frozen-thawed pig sperm of endangered Vietnam native pig breeds. Ejaculated sperm was collected from live boars and epididymal sperm was collected from slaughtered boars of the MuongTe, Kieng Sat and Co BinhThuan breeds and frozen in 0.25 ml straws using a protocol established earlier for modern pig breeds. We evaluated the sperm quality after thawing in terms of motility and rates of viable and abnormal spermatozoa. Our results revealed that the sperm motility and rates of viable and abnormal frozen-thawed sperm were >30%, >44%, and <14%, respectively. The origin of sperm had an effect on the production of pig embryos in vitro. In the Co BinhThuan breed, ejaculated sperm generated higher cleavage, blastocyst and hatching rates than did the epididymal sperm (60.11% vs 56.02%, 17.23% vs 14.31%, 3.78% vs 2.34%, respectively, P < 0.05). Although no difference in cleavage rate, blastocyst formation rate and the average number of cells/blastocysts, the hatching blastocyst rate was different between the breeds (P > 0.05). In the Co BinhThuan breed, the rate of pregnancy of ejaculated groups was similar to that of the epididymal group. In conclusion, the ejaculated and epididymal sperm of native Vietnamese pigs were successfully frozen. We succeeded in creating embryos in vitro and pregnant pigs after artificial insemination from frozen-thawed semen in three native Vietnamese pig breeds for the first time. The use of the ejaculated sperm improved the production of native pig embryos in vitro efficiency.

Study of Native Culture Aphasia and Compensation Strategies in English Education

English teaching in China has attached too much importance to the input of the target language culture,while neglecting our native culture.As a result,students cannot express Chinese culture in English,completely separating Chinese culture from English learning,leading to the serious native culture aphasia.This paper not only analyzes the reasons for this phenomenon from the aspects of curriculum setting,learning motivation,and teachers’quality,but also explains the necessity of integrating Chinese native culture in English teaching.On this basis,effective solutions are put forward from the perspective of classroom teaching,textbook compilation,curriculum arrangement,and so on.

Native Species Composition and Diversity of Valuable Woody Plants Regeneration during Fallow Period in Kamwatta, Moruca, Guyana

An intelligent method of shifting cultivation to regenerate vegetation after a long fallow period is critical information for restoration strategies. The literature review identified that the assessment of woody plant species on abandoned farmland has never been done before in Kamwatta, Moruca Region 1. In addition, more information should be available in indigenous communities and at the national level, including more documentation of the utilization of natural resources by the Warrau community. This study assessed the valuable woody plant species that grew during the fallow periods. Nine farmlands were randomly selected along a 100 m transect, each with varying fallow periods. In order to collect information on the age of farm abandonment, the researcher employed a mixed-methods approach. First, we found how long each farm had been fallow by administering a semi-structured questionnaire. Then, we conducted a flora survey to gain information on the variety and abundance of valuable plants using the age of farm abandonment as a dependent variable. The data analysis included the number of valuable woody trees with a diameter of >10 cm, seedlings and saplings with a diameter of <10 cm, the location of identified trees, and the uses of identified tree species. Microsoft Excel was used to code and analyze the questionnaire, while QGIS, Shannon’s Index of Diversity, and Simple Linear Regression were used to analyze the inventory data. The results showed that the respondents listed 38 valuable woody species, and 79% occurred in the studied area. The field verification revealed that the dominant family in the area was Mimosaceae. Species abundance increased with fallow up to 10 years before declining in the latter years. Plant diversity and abundance had a weak relationship with the age of abandoned farmlands for woody trees, while the seedlings and saplings showed no relationship.

The Potential Cultural Differences in Native-speaker Teacher's Language Classroom

While the majority of nonnative speaker English teachers teach alongside NS teachers,research on the role of native speaker English teachers in China's teaching context and the attitudes of university students towards them have been rarely conducted.This essay discusses the implications of cultural differences for the language classroom,and the different cultures of learning with regard to language teaching and learning in China and the Wes.The conclusion suggests that it is of great importance to have a good sense of cultural awareness and an open mind for cultural interactions,in order to benefit both language learners and native speaker teachers in the cross-cultural classroom.

Invasive Species Found More Resilient to Extreme Weather Events Than Their Native Counterparts

A new study appeared in Nature Ecology and Evolution on November 6 finds that extreme weather events like heatwaves,floods,and storms may favor invasive species over their native counterparts(doi:10.1038/s41559-023-02235).Analyzing responses of over 2,000 species,researchers found non-native animals were less negatively impacted by extreme events compared to natives.

Survival of Seedlings of Native Woody Species in the Rehabilitation of Gold Mined-Site within a Three Years Old Acacia mangium Willd Plantation of St. Elizabeth-Mahdia, Guyana

Active restoration is a critical component of biodiversity conservation for degraded tropical forest ecosystems caused by artisanal gold mining, and the success of restoration is dependent on native species selection. However, significant knowledge gaps exist regarding when and where to plant trees. This article reports on a revegetation trial undertaken in St Elizabeth, Mahdia, Guyana, to assess the survival and RGR (Relative Growth Rate) of three native woody trees and shrubs planted within three years old Acacia mangium Willd trees pruned and unpruned blocks. ANOVA (Analysis of Variance) for a completely randomized block design with four blocks, two pruned and two unpruned, within A. mangium plots. Biochar treatment was added to the plants during transplanting. Thirty-six (36) wildlings of Humiria balsamifera (Aublet.) (Tauroniro), Goupia glabra Aublet (Kabukalli), and Vismia guianensis (Aublet.) Choisy (Bloodwood) were collected and raised in a tree nursery for two weeks. The native plants were transplanted 3 m apart, survival observations and each seedling’s initial height and diameter were measured and recorded. After the experiment, 13% of seedlings from a population of 720 had died, with the highest mortality being experienced at the 92 days of the experiment (t ≤ 122 days). While the overall survival rates were high, emphasizing the importance of field trials on native and exotic species in different environments is essential to fill the knowledge gaps on suitable species for restoration in degraded areas with other land use histories.

Overview of Native-speaker English Teacher Versus Non-native-speaker English Teacher

As much more non-native-speaker English teachers teach alongside native-speaker English teachers, either in China or any other non-English-speaking country, research on the differences between native-speaker English teacher and non-native-speaker English teacher is necessary. This paper offers an overview of such difference between the two groups of English teachers in terms of their strengths and weaknesses, teaching styles and approaches. The conclusion suggests that cooperation and communication be emphsised and that the two groups of teachers communicate more and exchange their ideas on how to teach the same group of students more effectively.

syngo NATIVE无对比剂MR血管成像技术

syngo NATIVE是西门子磁共振事业部独家推出的无对比剂MR血管成像软件包,经过严格的内部和外部测试,以及全球数十名临床专家的反复应用,获得大量的建议和好评,目前已经成为一种成熟和完善的技术。syngo NATIVE包括两种不同的技术:syngo NATIVE True FISP和syngo NATIVE SPACE,分别用于腹部动脉(特别是肾动脉)和外周动脉的成像。本文分别对这两种技术的原理以及临床检查的要点进行了介绍。

Native XML数据库技术综述

XML成为数据统一描述和表示的标准。如何管理已经出现的大量的XML数据成为重要的问题。NativeXML数据库(NXD)是解决XML数据管理的重要手段。分析和综述了NXD研究现状,以及几个主要研究方向:数据模型、查询语言、存储技术等。分析了NXD的基本特性和具有代表性的NXD系统,最后指出了目前研究存在的不足以及该学科的发展趋势。

心脏磁共振成像Native T1 mapping序列对急性心肌炎的诊断价值

目的 探讨心脏磁共振成像（CMR） Native T1mapping序列对急性心肌炎的诊断价值.方法 选择2014年2月至2015年10月于首都医科大学附属北京安贞医院确诊为急性心肌炎患者25例（急性心肌炎组）和25名健康志愿者（对照组）,分别行CMR黑血T2、Native T1 mapping及钆对比剂延迟强化（LGE）序列扫描,分析对比左心功能、黑血T2信号强度比、T1弛豫时间、LGE出现部位以及黑血T2、Native T1 mapping、LGE三种序列的诊断效能.结果 急性心肌炎组左心室射血分数、左心室每搏输出量、心排血量明显低于对照组[（55±8）％比（59±7）％、（49±16） ml比（54±12） ml、（3.6±1.0） L/min比（3.9±1.2） L/min],T1弛豫时间、T2信号强度比明显高于对照组[（1 308±56）ms比（1 241 ±20） ms、（1.75±0.23）比（1.57 ±0.14）],差异均有统计学意义（均P＜0.05）.对照组没有出现LGE,急性心肌炎组47个心肌节段出现LGE,其中位于心外膜下21处（44.7％）和心肌中层22处（46.8％）,而侧壁22处（46.8％）和下壁23处（48.9％）,25例患者没有出现单独的心内膜下LGE类型.T1mapping序列诊断急性心肌炎的敏感度（91.5％）和准确率（90.4％）要明显高于黑血T2序列（50.3％、64.2％）和LGE序列（73.1％、83.0％）,特异度（89.2％）低于LGE序列（96.3％）而高于黑血T2序列（88.5％）.结论 CMR T1mapping对于急性心肌炎有很好的诊断价值,其相对于黑血T2和LGE有更高的敏感度和准确率,尤其是对于弥漫性病变及微小的局灶性病变,其量化分析的优势更加明显.