A potential giant gallium deposit hosted in the tailing dam of the Fankou Zn-Pb deposit in northern Guangdong Province, South China

1.Objective The Fankou giant zinc(Zn)-lead(Pb)deposit in Guangdong Province is well-known for its huge reserves of over 10 Mt(million ton)Zn+Pb metals and high ore-grade with Zn+Pb exceeding 15%(Guangdong Fankou Deposit Investigation Group,1980;Zhu XY et al.,2017).After 60 years of exploration and exploitation,the deposit has accumulated millions of tons of tailings.One interesting question is that what components are hosted in these tailings,and whether some key and critical metals such as gallium and germanium are extremely enriched and worth further comprehensive utilization.This motivated us to conduct an integrated set of field investigation,sampling,major-trace element analyses and reserve assessments about the Fankou tailings.In this contribution,we discover that the tailings contain a variety of metal elements such as zinc,lead and gallium with comprehensive utilization potential.These data can act as a scientific guidance for further exploration and utilization of the Fankou tailings,and aid to enhance the utilization efficiency of the key mineral resource in China.Our study also provide demonstration for future green mine construction in China.

Mechanism of Guangdong Shenqu in regulating intestinal flora in mice with food stagnation and internal heat based on 16S rDNA sequencing Author links open overlay panel

Objective To investigate the effect of Guangdong Shenqu(GSQ)on intestinal flora structure in mice with food stagnation through 16S rDNA sequencing.Methods Mice were randomly assigned to control,model,GSQ low-dose(GSQL),GSQ medium-dose(GSQM),GSQ high-dose(GSQH),and lacidophilin tablets(LAB)groups,with each group containing 10 mice.A food stagnation and internal heat mouse model was established through intragastric administration of a mixture of beeswax and olive oil(1:15).The control group was administered normal saline,and the model group was administered beeswax and olive oil to maintain a state.The GSQL(2 g/kg),GSQM(4 g/kg),GSQH(8 g/kg),and LAB groups(0.625 g/kg)were administered corresponding drugs for 5 d.After administration,16S rDNA sequencing was performed to assess gut microbiota in mouse fecal samples.Results The model group exhibited significant intestinal flora changes.Following GSQ administration,the abundance and diversity index of the intestinal flora increased significantly,the number of bacterial species was regulated,andαandβdiversity were improved.GSQ administration increased the abundance of probiotics,including Clostridia,Lachnospirales,and Lactobacillus,whereas the abundance of conditional pathogenic bacteria,such as Allobaculum,Erysipelotrichaceae,and Bacteroides decreased.Functional prediction analysis indicated that the pathogenesis of food stagnation and GSQ intervention were primarily associated with carbohydrate,lipid,and amino acid metabolism,among other metabolic pathways.Conclusion The digestive mechanism of GSQ may be attributed to its role in restoring diversity and abundance within the intestinal flora,thereby improving the composition and structure of the intestinal flora in mice and subsequently influencing the regulation of metabolic pathways.

Zhongshan:Rising Dragon of Guangdong

My journey to Zhongshan City in Guangdong Province alongside experts,foreign correspondents,and local Chinese journalists proved to be an enlightening exploration of the intricacies of China’s development,especially within its smaller cities.While a brief five-day sojourn wasn’t sufficient for intimacy with the city’s entirety,the immersion into Zhongshan’s cultural,historical,and modern facets,including Zhongshan Museum,urban planning zones,business hubs,an industrial park,ancient villages,Dr.Sun Yat-sen Museum,and a monumental bridge project,left me with the impression that the city is awakening like a dragon ascending from the heart of Guangdong.

Research on the Digital Transformation of the Whole Industry Chain of Guangdong Supply and Marketing Cooperative

Guangdong Supply and Marketing Cooperative serves as an important institution for the“Three Rural Areas”in the Guangdong-Hong Kong-Macao Greater Bay Area.Its digital transformation and optimization serve as powerful supports for rural revitalization.This paper systematically reviews the main practices and effectiveness of the digital transformation within the Guangdong Supply and Marketing Cooperative.It also analyzes the current development dilemmas faced in the construction of digital supply and marketing.Additionally,it proposes targeted solutions,including building a big data resource base,optimizing the digital supply and marketing cloud platform,developing digital publictype agricultural social service applications,establishing a new model of rural e-commerce,enhancing the traceability management system for agricultural products,and strengthening the construction of the digital human resources system.These proposals aim to further promote the strategy for revitalizing the countryside.

Suitability evaluation on marine ranching in Guangdong,South China

The ecological suitability of marine resources and environmental conditions for marine ranching in Guangdong,South China was evaluated.Niche theory was used to establish an ecological suitability evaluation model for marine ranching site selection,and suitability evaluation of marine ranching was conducted in.Results show that the ecological suitability index of marine ranching site selection was greater than 64.0 in 20 sites,including offshore Shantou Bay,offshore Zhanjiang Port,and Longdou Bay etc.,which are the priority areas for marine ranching.In other 13 sites,the ecological suitability index ranged between 8.0 and 32.0,including Houjiang Bay,Haimen Bay,and Jieshi Bay etc.,indicating the suitability for marine ranching.However,the ecological suitability index was 0 in Shantou Bay,Zhujiang(Pearl)River estuary,Huangmao Sea,Guanghai Bay,Zhanjiang Port,Qiongzhou Strait,and Anpu Port.These sites are thus unsuitable for marine ranching.This study provides a theoretical basis for site selection and planning of marine ranching in Guangdong Province.

Impacts of Sea Surface Temperature on the Interannual Variability of Winter Haze Days in Guangdong Province

The impact of sea surface temperature(SST)on winter haze in Guangdong province(WHDGD)was analyzed on the interannual scale.It was pointed out that the northern Indian Ocean and the northwest Pacific SST play a leading role in the variation of WHDGD.Cold(warm)SST anomalies over the northern Indian Ocean and the Northwest Pacific stimulate the eastward propagation of cold(warm)Kelvin waves through the Gill forced response,causing Ekman convergence(divergence)in the western Pacific,inducing abnormal cyclonic(anticyclonic)circulation.It excites the positive(negative)Western Pacific teleconnection pattern(WP),which results in the temperature and the precipitation decrease(increase)in Guangdong and forms the meteorological variables conditions that are conducive(not conducive)to the formation of haze.ENSO has an asymmetric influence on WHDGD.In El Niño(La Niña)winters,there are strong(weak)coordinated variations between the northern Indian Ocean,the northwest Pacific,and the eastern Pacific,which stimulate the negative(positive)phase of WP teleconnection.In El Niño winters,the enhanced moisture is attributed to the joint effects of the horizontal advection from the surrounding ocean,vertical advection from the moisture convergence,and the increased atmospheric apparent moisture sink(Q2)from soil evaporation.The weakening of the atmospheric apparent heat source(Q1)in the upper layer is not conducive to the formation of inversion stratification.In contrast,in La Niña winters,the reduced moisture is attributed to the reduced upward water vapor transport and Q2 loss.Due to the Q1 increase in the upper layer,the temperature inversion forms and suppresses the diffusion of haze.

Guangdong Tax Services Help Chinese Companies Go Global

“Over the years,China has explored smart taxation driven by data and technology,”said Chen Liexin from the International Taxation Management Division of Guangdong Provincial Tax Service,the State Taxation Administration(STA)of China,during an exchange activity for young tax officers from the BRICS countries of Brazil。

Coupling Analysis of Tourism Development and Rural Revitalization in Yannanfei Tea Field Resort of Guangdong Province

By deconstructing the dimensions of rural tourism and rural revitalization and constructing a coupled conceptual model,a coupled evaluation model is constructed.Yannanfei Tea Field Resort in Guangdong is taken as a research case for empirical analysis,to explore the coupled development trend of the two.The results show that①the tourism development of Guangdong Yannanfei Tea Field Resort has a good synergistic relationship with rural revitalization.The two complement and promote each other,and rural tourism has significantly promoted the development of rural revitalization.②The coupling development of tourism development and rural revitalization in Guangdong Yannanfei Tea Field Resort is divided into coupling imbalance period and coupling coordination period.The results indicate that the coordination between the two has not yet reached a level of good coordination and high-quality coordination.It is recommended that the resort should fully utilize the opportunity of rural revitalization strategy,increase investment in rural tourism,promote the transformation and upgrading of the resort,impel the integration of tea and tourism,and develop new business model of tea-tourism rural vacation.

家用洗涤对莨纱绸织物性能的影响

莨纱绸是利用全天然的原料在自然条件下加工而成,是中国独有的经典丝绸产品。文章研究了家用洗涤对莨纱绸织物性能的影响,以期对莨纱绸织物的服用性能有更深的了解。在洗涤过程中莨纱绸表面的黑胶层对织物的损伤具有保护作用。同等条件下莨纱绸洗后的强力损伤仅为普通丝绸的一半,具有极优异的耐洗涤性能。随着洗涤的进行,莨纱绸正面的黑胶层会逐渐剥落,织物反面的纤维逐渐起绒和原纤化,这有助于莨纱绸与皮肤触感的改善。反复洗涤后,莨纱绸的悬垂性明显提高,克罗值有所下降,紫外线防护性能提高,疏水性能没有明显改变。结果表明,家用洗涤可以改善莨纱绸的手感和服用性能,使其具有越洗越柔软和越洗越凉爽的织物特性。

广东省陶瓷行业碳排放配额分配方法初探

陶瓷行业是国民经济和社会发展的重要基础材料,也是我国实现双碳目标的重要工业行业。全国碳市场启动以来,电力行业由广东试点市场转入全国碳市场交易,陶瓷作为高碳排放行业,已经确定作为下一批纳入广东试点市场的行业之一。基于陶瓷企业工艺特点,结合各碳交易试点陶瓷行业配额分配方法,以及广东省陶瓷企业碳排放核算方法和现行其他行业碳排放配额分配方案,采用基准法结合历史强度法或全部采用历史强度法是广东省陶瓷企业碳排放配额的选择方向,同时在配额分配时可以考虑兼顾能源结构优化的鼓励政策。

广东烟粉虱传双生病毒的发生种类、分布及动态

为了监测烟粉虱传双生病毒在广东的发生与扩散动态,2003年-2021年,本课题组对全省烟粉虱传双生病毒进行了长期调查与监测。结果表明,在广东省广州、湛江、惠州等14市均有烟粉虱传双生病毒病的发生,危害的寄主植物有番茄、南瓜、甘薯等24种,其中番茄黄化曲叶病发生和危害尤为严重,广泛分布于全省各地;从14市采集的病样中共鉴定出烟粉虱传双生病毒21种,其中广东番茄黄化曲叶病毒(tomato yellow leaf curl Guangdong virus,TYLCGdV)、广东番茄曲叶病毒(tomato leaf curl Guangdong virus,ToLCGdV)、黄蝉曲叶病毒(Allamanda leaf curl virus,AllLCV)、广东雾水葛花叶病毒(Pouzolzia mosaic Guangdong virus,PouMGDV)、十萼茄黄花叶病毒(Lycianthes yellow mosaic virus,LyYMV)5种病毒为新种;同时,发现危害不同寄主的病毒种类存在差异,危害同一作物的病毒种类也存在动态变化。本文明确了广东烟粉虱传双生病毒分布广、种类多、危害重,为全省烟粉虱传双生病毒病的防控提供了科学依据。

粤东金坑锡铜多金属矿燕山期岩浆热液叠加成矿

金坑锡铜多金属矿位于广东莲花山断裂带北东段,是近些年来在粤东地区新发现的典型锡铜多金属矿,关于该矿床的成因类型和成矿机制一直存在较大争议。矿区勘查工作在马山矿段首次发现伴有明显铜矿化的热液隐爆角砾岩,对于揭示矿床成因具有重要意义。LA-ICP-MS锆石U-Pb年代分析结果显示,花岗质角砾成岩年龄约为150 Ma,ε_(Hf)(t)值为-8.20~-4.55,二阶段Hf模式年龄值为1.73~1.49 Ga,指示岩浆主要来自于中元古代地壳物质,并有地幔物质加入。硫化物原位硫同位素分析结果显示,不同阶段硫化物硫同位素组成具有明显差别。第一阶段(Py-Ⅰ)和第二阶段(Py-Ⅱ)黄铁矿存在显著的硫同位素变化,前者为-0.65‰~1.11‰(n=5),后者为1.30‰~1.93‰(n=5),与Py-Ⅱ共生黄铜矿同位素值为1.42‰~1.87‰(n=16)。第三阶段硫化物中黄铜矿δ^(34)S值为3.69‰~4.32‰(n=4),其中隐爆角砾岩胶结物中黄铜矿(Ccp-Ⅲa)δ^(34)S为3.69‰~3.74‰,略低于第三阶段石英-绿泥石脉中黄铜矿(Ccp-Ⅲb)δ^(34)S值(4.29‰~4.32‰)。第四阶段黄铁矿(Py-Ⅳ)δ^(34)S值为-4.87‰(n=1),黄铜矿(Ccp-Ⅳ)δ^(34)S值为-3.07‰(n=1)。基于成岩成矿年代及硫化物原位硫同位素分析,文章认为金坑锡铜多金属矿床可能存在两期岩浆热液活动的叠加,其中~150 Ma壳幔混合来源花岗质岩浆活动可能是触发矿区铜矿化的重要岩浆事件,早于后期锡矿的形成(~144 Ma),这一发现有望为莲花山断裂带锡铜多金属矿指引新的方向。

广东省公共图书馆阅读品牌建设情况调查与分析

文章调查梳理广东省珠三角、粤北、粤东、粤西四个地区150个公共图书馆阅读品牌的建设及发展情况,总结归纳出阅读活动体量大种类多、品牌分龄分众化、新型文化空间赋能阅读推广、红色主题文化受追捧等阅读品牌建设成效,并进一步分析其存在的问题,提出做好阅读品牌的顶层设计、运营维护、延伸扩展等优化对策,以期对后期实践提供参考。

广东省2024年4月气候概况及极端性分析

2024年4月,广东省平均气温创历史4月新高,4月降水为有气象记录以来最多,但空间分布不均,呈北多南少。月内出现2次冷空气过程,同时先后出现了1981年以来最强的3轮4月份强降水过程,具有强对流明显、暴雨区重叠、累积雨量大、极端性显著的特点。

粤港澳全运会提升大湾区体育国际影响力研究

采用文献资料法、实地调研法和逻辑分析法等研究方法,探究粤港澳全运会提升大湾区体育国际影响力。研究认为:粤港澳大湾区体育国际影响力的阻滞因素包括国际赛事供给不足,体育市场开发有待提升;体制机制差异显著,体育资源要素流动受阻;体育媒体供给失衡,国际媒体合作交流受限。通过粤港澳全运会发挥各地体育资源禀赋,打造大湾区体育赛事品牌;创新体制机制深度融合,畅通大湾区体育要素流动和培育多元体育媒体供给,建构大湾区体育国际传播体系等策略提升大湾区体育国际影响力。

广东省台风巨灾指数保险的研发与应用

文章结合广东省巨灾保险的具体实践,详细介绍了台风巨灾指数保险的研发流程、数据和关键方法,回顾了2016—2023年期间广东省台风巨灾指数保险的应用情况,系统分析了现有保险方案的优势和特点,以及存在的问题和不足,并探讨了未来可能的改进方向。主要结论为:1)基于圆形巨灾框、采用台风强度等级作为赔付结构分层标准的台风巨灾指数保险具有方法简单、易于回算、数据易获取、结果客观透明等优点;2)台风巨灾指数保险具有理赔速度快、运营成本低、可有效规避道德风险等优势;3)现有台风巨灾指数保险方案在特定情形下基差风险较为明显,对气候变化背景下台风灾害事件的极端性以及单次台风事件影响多个地市等复杂情形考虑存在不足;4)未来可从更加深入全面分析台风灾害事件规律和特征、增加更多的物理参数、获取更为准确的台风强度等级概率分布等方向加以改进。

城市群人口集聚对共同富裕的影响——基于粤港澳大湾区的分析

共同富裕是中国式现代化的重要特征和中国特色社会主义的本质要求,如何推进共同富裕目标的实现成为政府和学界亟待解决的难题。以粤港澳大湾区为样本探讨城市群人口集聚对城市群内部以及周边区域共同富裕的影响,在理论分析的基础上采用“全面FGLS”方法以及动态面板空间杜宾模型进行估计得到如下结论:粤港澳大湾区人口集聚无论是对于城市群内部共同富裕还是带动周边区域共同富裕均具有积极的促进作用,在短期内存在正向的空间溢出作用,但长期而言粤港澳大湾区人口不可能无限集聚,当发展到一定程度后拥挤效应将超过集聚效应对共同富裕产生负面影响。上述结论意味着当前粤港澳大湾区内部形成的多中心集聚的态势,空间协调发展程度较高,在推动城市群内部共同富裕的同时,短期内也带动了周边区域的发展,但长期持续的发展仍需人口在粤港澳全域更为均衡地分布,而非无限向粤港澳大湾区集聚。基于上述结论,提出应重视基础设施的互联互通、产业互联、城市互联等,促进粤港澳大湾区与粤东西两翼及山区人口等要素资源更为顺畅地流动,优化资源配置,促进粤港澳全域发展,实现真正意义上的先富带动后富,最终实现共同富裕。

《广东省实验动物管理条例》制度特点及近十年实施情况分析

《广东省实验动物管理条例》(以下简称《条例》)于2010年10月正式颁布实施,明确授权广东省实验动物监测机构开展实验动物质量监测工作并承担相应法律责任,明确了实验动物生产和使用规范,推动了实验动物福利伦理关注,标志着广东省实验动物管理工作进入了法制化管理的新阶段。通过制定《条例》配套文件,广东省积极推行行政执法工作规范化、标准化以及“放管服”措施,在促进广东省实验动物规范管理和支撑生物医药创新发展方面发挥了积极的作用,在实验动物科技平台建设、标准化工作、特色资源保存研制和人才队伍建设等方面取得了显著成绩。然而,随着科技进步、社会经济发展和立法工作的深入,《条例》在实施过程中也发现了一些需要完善的内容,如实验动物福利内容规定需进一步明确、基因工程动物管理需加强具体指引、从业人员安全福利保障相关规定需完善、“一票否决制”需进一步细化落实、实验动物标准化建设仍需进一步推动、实验资源共享需探索有效机制。本文对《条例》的制度特点、立法后的实施情况和成效,以及实施中存在的问题及对策等方面进行梳理归纳,总结了广东省近10年的实验动物管理实践经验,以期为实验动物立法提供参考。

脑血管疾病风险人群湿证相关特征的流行病学调查

【目的】探究广东地区脑血管疾病风险人群与中医湿证相关的流行病学特征。【方法】采用横断面研究的方法,调查330例广东常住居民脑血管疾病风险相关的临床资料,进行中医湿证诊断、量化评分及脑卒中风险评级,总结湿证分布规律并分析其影响因素。【结果】(1)诊断为湿证的研究对象共306例(占92.73%),风险组诊断为湿证人群的占比为93.82%(258/275),略高于健康组的87.27%(48/55),但差异无统计学意义(χ2=2.91,P=0.112),而风险组的湿证量化得分高于健康组,差异有统计学意义(Z=-2.24,P=0.025)。(2)在具有脑血管疾病危险因素的研究对象中,评价时间(χ2=26.11,P=0.001)、脑卒中风险等级(χ2=8.85,P=0.031)、脑卒中或短暂性脑缺血发作(TIA)病史(χ2=9.28,P=0.015)是脑血管病风险人群湿证等级的影响因素。【结论】湿证是广东地区人群常见的中医证候;具有脑血管疾病危险因素,尤其是脑卒中高风险人群、脑卒中或TIA病史患者,其湿证程度明显增高;未来在广东开展脑卒中预防工作应考虑湿证的评估与干预。

新气候态下广东省高温特征及影响

基于1951-2021年广东省86个国家站的逐日高温资料,采用常规时序、空间统计等方法对新气候态下广东省高温的时空特征进行分析,结果表明:广东省年高温日数1951-2021年呈显著增加趋势,尤其进入21世纪以来高温日数增加趋势明显;高温天气主要发生在6-9月,集中在7-8月,其中也包括各地极端最高气温。广东省年平均高温日数呈南低、北高的空间分布,并存在3个高值中心;极端最高气温从西北向沿海递减。高温天气对生产生活将产生诸多不利影响,如气象敏感性疾病高发,火灾风险加大,农作物产量、质量降低,能源供应压力和用电负荷增加,道路交通事故频发等。