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Background The number of elderly comorbidity patients in our country is continuously increasing. With the accumulation of chronic diseases, older adults experience varying degrees of health loss. Currently, there is a lack of research analyzing the multi-level factors influencing the number of chronic conditions in elderly comorbidity patients. Objective To explore the factors influencing the number of chronic conditions in elderly patients from different levels combining with the etiology and characteristics of chronic diseases based on the health ecology model, so as to provide evidence for the management and prevention of chronic diseases in community-dwelling elderly comorbidity patients in our country. Methods In February 2023, a multi-stage stratified cluster random sampling method was used to select community-dwelling elderly (≥60 years old) comorbidity patients in Guangdong province as the survey subjects. A face-to-face interview was conducted using the "Survey Questionnaire on the Status and Influencing Factors of Elderly Patients with Multiple Chronic Conditions", which was based on the health ecology model and included five levels of individual trait, behavioral characteristic, interpersonal relationship, living and working conditions, and policy environment. The number of chronic conditions in elderly comorbidity patients was considered as the dependent variable, and an unordered multivariate Logistic regression analysis was conducted by incorporating independent variables according to the five levels. Results A total of 1 000 questionnaires were distributed, and 987 valid questionnaires were collected, with a recovery rate of 98.7%. Among the 987 elderly comorbidity patients, 346 (35.1%) had two concurrent chronic diseases, 456 (46.2%) had three concurrent chronic diseases, and 185 (18.7%) had more than three concurrent chronic diseases. The results of unordered multivariate logistic regression analysis showed that, compared to elderly patients with two concurrent chronic diseases, disease duration less than 6 years and 6-10 years, local urban household were risk factors for elderly patients with three concurrent chronic diseases (P30 000-50 000 yuan, and having urban employee medical insurance/rural resident medical insurance were protective factors for elderly patients with more than three concurrent chronic diseases (P

As a high-quality fish with high protein and unsaturated fatty acids, Siniperca chuatsi is an important aquaculture species in Guangdong, with a stable aquaculture production that ranks first in the whole country, and the production in 2022 was 148 700 t, accounting for 37.05% of the total output of S. chuatsi in the country. With the increasing demand for high-quality aquatic products in domestic market, S. chuatsi is increasingly favored by domestic consumers. China's S. chuatsi production has grew steadily from 2018 to 2022, with Guangdong, Hubei and Anhui ranking the top three in terms of S. chuatsi production, and the degree of industry aggregation will further increase. With the overall production of S. chuatsi in Guangdong rising on a steady trend, the domestic market share of S. chuatsi has been gradually occupied by Guangdong. Compared with China's major freshwater aquaculture fish, the market wholesale price of S. chuatsi has a greater advantage. As a key breeding area of S. chuatsi industry in China, and the largest production area of S. chuatsi seedlings in the country, the major breeding species of S. chuatsi in Guangdong is S. chuatsi (Basilewsky), and the main production areas of the breeding are located in Foshan, Zhaoqing, Guangzhou, Qingyuan, and Jiangmen, etc. The major breeding modes are pond breeding, cage breeding, water tank breeding and factory feed breeding, with the mainly breeding way of feeding on live bait fish. There is gradual expansion of S. chuatsi aquaculture and market scale in Guangdong Province with future development trend of large-scale breeding. Taking the market price of S. chuatsi in 2022 as a reference, a cost-benefit analysis was conducted for the S. chuatsi cultured with live bait and feed.The results showed that the average total cost of feed S. chuatsi was much lower than that of live bait S. chuatsi, with a large profit margin. In regard to the deficiencies of seedling, breeding environment and feed-based mode of S. chuatsi breeding industry in Guangdong, countermeasures such as strengthening the S. chuatsi seed system, promoting the development of feed S. chuatsi stably, further building a quality and safety system for S. chuatsi, and actively pushing the transformation of S. chuatsi breeding mode were proposed to provide references for the development of S. chuatsi industry in Guangdong.

Copyright of Journal of South China Agricultural University is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

As a high-quality fish with high protein and unsaturated fatty acids, Siniperca chuatsi is an important aquaculture species in Guangdong, with a stable aquaculture production that ranks first in the whole country, and the production in 2022 was 148 700 t, accounting for 37.05% of the total output of S. chuatsi in the country. With the increasing demand for high-quality aquatic products in domestic market, S. chuatsi is increasingly favored by domestic consumers. China’s S. chuatsi production has grew steadily from 2018 to 2022, with Guangdong, Hubei and Anhui ranking the top three in terms of S. chuatsi production, and the degree of industry aggregation will further increase. With the overall production of S. chuatsi in Guangdong rising on a steady trend, the domestic market share of S. chuatsi has been gradually occupied by Guangdong. Compared with China’s major freshwater aquaculture fish, the market wholesale price of S. chuatsi has a greater advantage. As a key breeding area of S. chuatsi industry in China, and the largest production area of S. chuatsi seedlings in the country, the major breeding species of S. chuatsi in Guangdong is S. chuatsi (Basilewsky), and the main production areas of the breeding are located in Foshan, Zhaoqing, Guangzhou, Qingyuan, and Jiangmen, etc. The major breeding modes are pond breeding, cage breeding, water tank breeding and factory feed breeding, with the mainly breeding way of feeding on live bait fish. There is gradual expansion of S. chuatsi aquaculture and market scale in Guangdong Province with future development trend of large-scale breeding. Taking the market price of S. chuatsi in 2022 as a reference, a cost-benefit analysis was conducted for the S. chuatsi cultured with live bait and feed. The results showed that the average total cost of feed S. chuatsi was much lower than that of live bait S. chuatsi, with a large profit margin. In regard to the deficiencies of seedling, breeding environment and feed-based mode of S. chuatsi breeding industry in Guangdong, countermeasures such as strengthening the S. chuatsi seed system, promoting the development of feed S. chuatsi stably, further building a quality and safety system for S. chuatsi, and actively pushing the transformation of S. chuatsi breeding mode were proposed to provide references for the development of S. chuatsi industry in Guangdong. [ABSTRACT FROM AUTHOR]

Copyright of China Tropical Medicine is the property of China Tropical Medicine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

利用南方适宜地区的丘陵山地资源发展油茶产业是未来解决我国油脂行业自给率不足的一个重要途径。河源市是广东省特色油茶产业发展重点区域，有多年种植油茶的传统。在国家政策的激励下，河源市特色油茶产业虽得到一定发展，但也面临机遇和挑战。通过文献调研和实地考察综述了河源市油茶产业的发展历程和发展现状，并针对当地油茶产业存在的良种资源缺乏、缺乏对油茶品种的科学性认识、配套资金补贴不充足、品牌知名度低、产业化程度不高等问题，结合当地实际情况，提出了推进油茶良种繁育基地建设、增加油茶产业资金扶持力度、加强科技创新推广成果转化、加强推广宣传并打造全国知名品牌、有效整合资源优化加工生产布局等相应对策，促进油茶产业高质量发展。It is an important way to solve the shortage of self-sufficiency rate of oil industry by using the hilly resources to develop the Camellia oleifera industry in suitable areas in southern China.Heyuan City is a key area for the development of special Camellia oleifera industry in Guangdong province, which has a tradition of growing Camellia oleifera for many years. Encouraged by national policies, the Camellia oleifera industry in Heyuan has developed vigorously but it still faces with opportunities and challenges. Through literature research and field investigation, the development history and development status of Heyuan Camellia oleifera industry were investigated, where some problems were emerged, including lack of improved variety resources, lack of scientific understanding of Camellia oleifera variety, insufficient capital investment, low brand recognition, and low level of industrialization to Camellia oleifera, etc. In view of the aforementioned existing problems based on the local situation, the corresponding strategies for high-quality industrial development were proposed, such as promoting the construction of improved variety breeding base, increasing capital investment,strengthening the transformation of scientific and technological innovation, enhancing the publicity for making renowned national brand, effectively integrating resource and optimizing production layout.

Background Currently, there are many studies on family doctor contracting services from the perspective of residents, but few scholars have conducted studies on the current situation of family doctor team contracting based on the perspective of general practitioners (GPs) . Objective To understand the current situation of family doctor contracting services in primary health care institutions in Guangdong Province, and explore the factors affecting the contracted number from the perspective of the supplier. Methods From July 5—31, 2021, GPs in primary health care institutions in Guangdong Province were selected as the study subjects by using a multi-stage stratified cluster sampling method to conduct the survey with a self-designed questionnaire. The contracted number was compared by different GPs and their family doctor team characteristics. A two-level Logistic regression developed by R 4.2.2 software was used to identify influencing factors of contracted number above 2 000. Results A valid sample of 3 252 cases in family doctor team with contracted number more than 100 was screened, and the median contracted number was 1 400 (2 499) in 2020. The differences were statistically significant when comparing the contracted number by gender, age, education level, position, employment form, working years, working unit, working area, training acceptance, and annual income, number of team members, population size under jurisdiction, willingness of specialists from medical community to join the team, inpatient bed resources and guidance from superior departments (P

Background Stroke high-risk population screening project is a national health project being vigorously promoted in China, but it is found that the participation rate of residents in it is low, which seriously affects the screening efficiency. Screening intention is an important predictor of screening behavior, however, there are few studies on the current status and influencing factors of the intention to screen for high-risk stroke among community residents. Objective To understand the current status of the intention to screen for high-risk stroke among community residents and explore the influencing factors. Methods A total of 648 residents of Guangdong Province were selected as survey respondents by using convenient sampling method from March to May 2022. Self-designed questionnaires (including General Data Questionnaire, Stroke High-Risk Screening Intention Scale, Stroke Health Knowledge Scale, Community Medical Service Trust Scale, Perceived Social Support Scale) were used to investigate the respondents. The scores of Stroke High-Risk Screening Intention Scale among residents with different characteristics were compared, and the factors affecting intention to screen for high-risk stroke among community residents were analyzed by multiple linear regression. Results A total of 600 valid questionnaires were collected with the recovery rate of 92.6%. The average total score of the Stroke High-Risk Screening Intention Scale among residents was (101.30±14.98), of which 352 (58.7%) residents had a high level of intention for screening, 248 (41.3%) residents had a middle or low level of intention for screening. There were significant differences in the scores of Stroke High-Risk Screening Intention Scale among residents by gender, residential status, hypertension, hyperlipidemia, smoking status, awareness of high-risk stroke screening, implementation of previous high-risk stroke screening in the community, acceptance of previous high-risk stroke screening, self-perceived lifetime risk of stroke and self-perceived risk of stroke within 1 year (P

This article succinctly outlines the requirements for rice quality in Guangdong Province and the role of government regulatory policies in advancing high-quality rice breeding. By collecting the regional trial data of 1 101 rice varieties approved by Guangdong Province from 2004 to 2022, the number of varieties meeting the national or ministerial standards approved in each year were counted, and the progress of high-quality rice breeding in Guangdong was evaluated from the perspectives of quality index, resistance and yield. From 2004 to 2022, 106 varieties (combinations) meeting the quality of national standard (ministerial standard) (9.63% of all approved varieties) level Ⅰ and 320 varieties (combinations) reaching the quality of national standard (ministerial standard) (29.06%) level Ⅱ were approved by Guangdong. Notably, early season varieties exhibited lower quality rates compared with late season varieties. For rice quality traits, early-season trial varieties displayed lower compliance rates in the quality of national standard (ministerial standard) level Ⅱ, with chalkiness and chalky grain rate of 41.8% and 43.5%, respectively; the amylose content compliance rate in early-season trial varieties was only 37.32%, indicating that key improvements should be conducted in these three areas for new variety breeding. The average yield of rice varieties with quality meeting national standard level Ⅱ or above has consistently risen, indicating synergistic improvements in yield and rice quality during the high-quality rice breeding in Guangdong. Varieties meeting the national standard (ministerial standard) level Ⅱ or above also showed promising resistance rates against rice blast disease (85% at medium resistance or above) and bacterial blight disease (22.2% at medium resistance or above). Generally, while the percentage of hybrid rice varieties meeting high-quality standards is increasing, there is still a notable gap compared to conventional rice breeding. The proportion of high-quality rice varieties in Guangdong has been steadily growing, with a positive trend in "excellent, abundant and resistant" varieties. However, further optimization is possible. To cultivate high-quality rice varieties with double resistances, efforts should be put to enhance resistance to bacterial wilt disease. The evaluation and utilization of specific germplasm resources like local varieties should be increased to diversify the genetic background. This approach helps avoid variety homogenization, improves disease and stress resistance and strengthens the synergy between traditional and molecular breeding, enhancing overall breeding efficiency.

With the strong support of national and local policies, the construction of general practice education system and personnel training have been developed in Guangdong Province for nearly 30 years. Since 1996, general practice education in Guangdong Province has gone through four stages, including exploration and start, vigorous growth, development and perfection, comprehensive development. Colleges and universities in Guangdong Province, represented by Guangzhou Medical University, have explored and established a multi-level, multi-path, multi-form and multi-objective general practice education system of treatment-prevention integration, with interconnected academy education, job-transfer training, standardized training, postgraduate education and continuing education, and a standardized training model of general practitioners based on "5+3" has been basically established. The pass rate of the provincial training certificate examination of general practice training students has reached more than 85%. In 2020, there were 4 general practitioners per 10 000 residents, meeting the national requirement of 3 general practitioners per 10 000 residents in 2020. With the purpose to analyze the current situation of the development of general practice education in Guangdong Province, this paper comprehensively summarized the experience and lessons of discipline construction and education training of general practice, broadened the paths and modes of the quality of general practice personnel training, put forward relevant suggestions, to provide policy ideas and reference basis for the rapid development of general practice education in Guangdong Province and even in China in the future.

This article succinctly outlines the requirements for rice quality in Guangdong Province and the role of government regulatory policies in advancing high-quality rice breeding. By collecting the regional trial data of 1 101 rice varieties approved by Guangdong Province from 2004 to 2022, the number of varieties meeting the national or ministerial standards approved in each year were counted, and the progress of high-quality rice breeding in Guangdong was evaluated from the perspectives of quality index, resistance and yield. From 2004 to 2022, 106 varieties (combinations) meeting the quality of national standard (ministerial standard) (9.63% of all approved varieties) level I and 320 varieties (combinations) reaching the quality of national standard (ministerial standard) (29.06%) level II were approved by Guangdong. Notably, early season varieties exhibited lower quality rates compared with late season varieties. For rice quality traits, early-season trial varieties displayed lower compliance rates in the quality of national standard (ministerial standard) level II, with chalkiness and chalky grain rate of 41.8% and 43.5%, respectively; the amylose content compliance rate in early-season trial varieties was only 37.32%, indicating that key improvements should be conducted in these three areas for new variety breeding. The average yield of rice varieties with quality meeting national standard level II or above has consistently risen, indicating synergistic improvements in yield and rice quality during the high-quality rice breeding in Guangdong. Varieties meeting the national standard (ministerial standard) level II or above also showed promising resistance rates against rice blast disease (85% at medium resistance or above) and bacterial blight disease (22.2% at medium resistance or above). Generally, while the percentage of hybrid rice varieties meeting high-quality standards is increasing, there is still a notable gap compared to conventional rice breeding. The proportion of highquality rice varieties in Guangdong has been steadily growing, with a positive trend in “excellent, abundant and resistant” varieties. However, further optimization is possible. To cultivate high-quality rice varieties with double resistances, efforts should be put to enhance resistance to bacterial wilt disease. The evaluation and utilization of specific germplasm resources like local varieties should be increased to diversify the genetic background. This approach helps avoid variety homogenization, improves disease and stress resistance and strengthens the synergy between traditional and molecular breeding, enhancing overall breeding efficiency. [ABSTRACT FROM AUTHOR]

Soil investigation, as an important content of modern agricultural investigation, was a product of the introduction of modern Western agricultural technology into China. Guangdong, located at the forefront of modern cultural exchange between China and the West, launched a large number of soil investigations across the province in order to improve its soil. The modern soil investigation in Guangdong began in the 1930s and was initiated simultaneously with the modern national soil survey. Guangdong was an important area for conducting soil surveys in China at that time. From the perspective of knowledge history, the rise of soil investigation in modern Guangdong in the 1930s was not an accidental historical event, but a complex historical process that began from the late Qing Dynasty to the early Republic of China, involving the localization of Western scientific knowledge and the accumulation of local scientific knowledge. This historical process includes not only the breeding of modern soil scientists under the introduction of Western soil science knowledge, but also the re-understanding and reconstruction of Chinese local geology and agricultural knowledge by modern intellectuals using Western scientific knowledge. [ABSTRACT FROM AUTHOR]

Copyright of Nuclear Safety is the property of Nuclear & Radiation Safety Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Coastal salt marshes, as an important wetland type, have great social, economic and ecological values. This study surveyed and analyzed the distribution of coastal salt marshes in Guangdong Province and Guangxi Zhuang Autonomous Region, based on multi-source domestic high spatial resolution satellite imagery and field survey. At the end of 2019, the distribution areas of coastal salt marshes in Guangdong and Guangxi were 1 258.00 hm2 and 1 450.36 hm2, respectively. Salt marshes distributed in 14 coastal cities of Guangdong except Maoming. The distribution areas of salt marshes in Zhuhai, Jiangmen and Zhanjiang were 438.89 hm2, 331.83 hm2 and 162.36 hm2, respectively, accounting for 34.89%, 26.38% and 12.91% of the total salt marsh area in Guangdong. Salt marshes distributed in 3 coastal cities of Guangxi. The distribution areas of salt marshes in Beihai, Fangchenggang, and Qinzhou were 1 354.87 hm2, 49.73 hm2 and 45.76 hm2, respectively, accounting for 93.41%, 3.43% and 3.16% of the total salt marsh area in Guangxi. The distribution areas of Spartina alterniflora in Guangdong and Guangxi were 327.96 hm2 and 1 312.02 hm2, respectively. Spartina alterniflora in Guangdong was mainly distributed in Jiangmen, Yangjiang, Zhanjiang and Chaozhou, with the area of 179.07 hm2, 73.64 hm2, 69.72 hm2 and 5.52 hm2, respectively. The area of Spartina alterniflora in the coastal tidal zone of Guangdong has been relatively stable in the past 5 years. Spartina alterniflora in Guangxi was mainly distributed in Beihai and Qinzhou, with the area of 1 309.04 hm2 and 2.98 hm2, respectively. The area of Spartina alterniflora in Guangxi increased by 1 311.08 hm2 compared with the introduction year. Spartina alterniflora expanded continuously in the east coast of Beihai, Tieshan Harbor, and Lianzhou Bay, especially Spartina alterniflora in Lianzhou Bay was in the rapid expansion period. More work is suggested to strengthen the operational monitoring, prevention and control of Spartina alterniflora.

ObjectiveTo summarize the characteristics of foodborne diseases in Guangdong Province in 2020， and to provide scientific basis for prevention and control strategies.MethodsThe data from January 2020 to December 2020 in the National Foodborne Surveillance Reporting System （CFSA） were with descriptive epidemiological analysis， conducted according to the three distribution and pathogenic factors of the disease. SPSS 21.0 software was used for statistical analysis.ResultsIn 2020， a total of 27 397 cases of foodborne diseases were reported， with an average annual incidence of 0.24‰ （27 397/115 210 000）， a hospitalization rate of 10.66%（2 920/27 397）， and no deaths. The incidence in the Pearl River Delta region was 0.28‰ （18 303/6 447 million）. The hospitalization rate was 6.88% （1 259/18 303）， and the incidence rate in eastern and northwestern Guangdong was 0.18‰ （9 094/5 074 million）， and the hospitalization rate was 18.26% （1 661/9 094）. The main symptoms of the cases were diarrhea， and the ratio of male to female was close to 1∶1. The number of cases in each age group was 31.51% （8 633/27 397） in the 31-59 age group. Among the occupational population， children living in the diaspora accounted for 16.86% （4 620/27 397）， while students accounted for 16.48% （4 515/27 397）. The peak of reported cases was from August to December. The main food exposed cases were mixed food 7 392 cases （27.08%， 7 392/27 297）， meat and meat products 4 511 cases （16.53%， 4 511/27 297）， grain and its products 3 734 cases （13.68%，3 734/27 297）； The main feeding places were 65.53%（17 954/27 397） at home and 15.03%（4 117/27 397） at restaurants. Among 4 395 cases， 1 171 were positive for pathogenic bacteria， and the overall positive rate of pathogenic bacteria was 26.64% （1 171/4 395）. The positive rate of Salmonella was 26.23% （1 153/4 395）. Sixteen strains of Vibrio parahaemolyticus were positive， and the positive detection rate was 0.36% （16/4 395）. Two strains of Escherichia coli were positive， and the positive detection rate was 0.05% （2/4 395）. The positive rate of Shigella was 0.02% （1/4 395）. The positive detection rate was the highest in July， and the main exposed food was grain and its products. Eleven cases were positive for norovirus and the overall positive rate was 0.25% （11/4 395）. The positive rate of norovirus was the highest in January， and the main exposed food was meat and meat products.ConclusionThe foodborne disease incidence of Guangdong Province in 2020 is low but the hospitalization rates have certain proportion， western part of guangdong region has low incidence but the hospitalization rate is higher， the pearl river delta region high incidence but hospitalization rate is low， cases analysis showed that family scattered children and students accounted for the high proportion of the crowd， the cases were mainly in the summer， Salmonella detection rate is higher， it should strengthen the focus on the prevention and control of the crowd.

Objective To reveal the clinical characteristics of adolescent depressive symptoms in Qingyuan City, Guangdong Province. Methods From March to April 2022, stratified random sampling method was adopted to randomly select 16 middle schools in Qingyuan City, Guangdong Province, and then two classes from each grade in each middle school were randomly selected, a total of 131 classes were selected, and all the students in the class were taken as the investigation objects. Demographic characteristics were assessed by self-designed general situation questionnaire, and depressive symptoms were assessed by depression scale made by epidemiological survey center. A total of 6 000 questionnaires were sent out, and 5 762 valid questionnaires were obtained, with an effective recovery rate of 96. 0%. Results Among the 5 762 students, 1 915 (33. 2%) had definite depressive symptoms. The age of students with definite depressive symptoms was 16 (15, 17) years old, and the peak was 16 years old, accounting for 28. 5% (546/1 915). The top three depressio n symptoms were inferiority [30. 2% (579/1 915)], annoyance [16. 2% (311/1 915)], and emptiness [15. 4% (295/1 915)]. Among them, girls, high school students, 0-6 years old parents of other people, single parent families, sleep problems, non-study electronic products use time greater than or equal to 1 h per day, the detection rate of adolescent depressive symptoms was higher, and the differences were statistically significant (P＜0. 05). Conclusion The incidence of depressive symptoms is high in Qingyuan City, Guangdong Province. The adolescents with depressive symptoms face inferiority, annoyance and emptiness. Gender, age, caregiver, family structure, sleep, and time spent on electronic devices were associated with depressive symptoms. [ABSTRACT FROM AUTHOR]

Vegetation variation is one of important indicators to evaluate the quality of ecological environment and measure the status of surface vegetation. Exploring the spatio-temporal dynamic variation of vegetation and its influencing factors is of great significance for the protection of ecological environment and the restoration of vegetation. Based on MODIS LAI satellite remote sensing products, meteorological data and socio-economic data, the spatial-temporal variation of LAI and its influencing factors in Guangdong province from 2003 to 2020 were explored through Theil-Sen Median trend analysis, Mann-Kendall significance test, Hurst index analysis and geographic detector. The results show that the variation of LAI annual mean exhibits a fluctuating upward trend(0.219/10a)from 2003 to 2020, and the LAI seasonal average in the descending order are winter(0.405/10a), spring(0.251/10a), autumn(0.139/10a)and summer(0.111/10a); spatially, high values of LAI are distributed in the northwest, while low values are distributed in the southeast, mainly in the Pearl River Delta and coastal economic zone. LAI showes a weakly sustainable and weakly anti-sustainable trend in the future. Moreover, the area with sustainability and improvement is larger than the area showing stability and degradation, indicating the strong possibility of improvement for vegetation in Guangdong province in the future. The main influencing factors of LAI in Guangdong province are elevation, population density and GDP, of which elevation has the most impact with an explanatory power of 16.9% for LAI spatial distribution. Moreover, the interaction of two factors could enhance the explanatory power of LAI spatial distribution in Guangdong province. [ABSTRACT FROM AUTHOR]

Copyright of Acta Scientiarum Naturalium Universitatis Sunyatseni / Zhongshan Daxue Xuebao is the property of Sun-Yat-Sen University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Seashore saline soil is a kind of soil formed after the sediments flowing into the sea with surface runoff or shallow sea sediments lifted up by wind and waves, flocculated and deposited in the intertidal zone under the action of tides and ocean currents, and finally exposed to the sea surface as the result of continuously silting up. The seashore saline soil in Guangdong Province is rich in resources, mainly distributed in Zhanjiang, Zhuhai, Jiangmen, Shantou and other places, and has an extremely important strategic position in the coastal economic development. Seashore saline soil is one of the main types of low and medium yielding fields, and the soils are characterized by high salt content and salinization. Due to the high nutrient content, rich soil organic matter and high potential fertility, they can become good fields through appropriate improvement measures. The management strategies of seashore saline soil utilization include isolating seawater from invading farmland again through engineering measures; improving drainage and irrigation conditions, applying rainwater dewatering and desalination technology, using artificial dewatering and desalination technology, planting combined wtih dewatering and desalination technology and other measures to drain and reduce salt. The sustainable utilization of seashore saline soil can be realized through soil improvement, scientific fertilization, root strengthening cultivation, selection of rice varieties resistant to salt or aquatic crop rotation and other technical measures. The seashore saline soil is an important reserve resource for the future development of arable land in Guangdong Province, and the full development and utilization of seashore saline soil is of great significance in increasing the sown area of grain, expanding arable land resources and ensuring food security. Based on the current situation of seashore saline soils in Guangdong, it is proposed to attach great imporntance to the special investigation of eashore saline soil resources, strengthen financial investment, promote scientific research, and establish long-term positioning observation stations for comprehensive management.

Objective To analize the influencing factors of diagnosis delay of patients with pulmonary tuberculosis in this area, and further to provide a scientific basis for improving continuously regional tuberculosis control plans and measures. Methods The reported information of new pulmonary tuberculosis cases in Yingde City, Guangdong from 2010-2020 was collected and abstracted from Tuberculosis Information Management System of China Information System for Disease Control and Prevention. Furthermore, the general levels trend and influencing factors (including gender, age, residence, medical institution of providing diagnosis, etc) of diagnosis delay, which defined as more than 28 days from the date of symptom onset to the date of diagnosis, were retrospectively analyzed during eleven years. Results (1) The total number of new pulmonary tuberculosis cases registered was 11 973 cases, and diagnosis delay occurred in 3 189 cases (accounting for 26.63%). And the median time of diagnosis delay was 17 days, which this time was calculated from the 29th day of symptom start date to the clear diagnosis date. (2) The ratio of diagnosis delay were about 30% in 2010, 2011 and 2020 and that of the other years were fluctuating between 22.35% ~ 26.65%. The trend of median time of diagnosis delay was increased year by year in 2010-2014 and median time of diagnosis delay jumped to a peak of 33 days in 2014. Fortunately, the trend in subsequent 6 years was a general decline and the minimum of median time of diagnosis delay was 9 days in 2018. (3) The ratio of diagnosis delay in ≥ 60 years group was 22.61% and significantly lower than other ages groups (P = 0.000). The ratio of diagnosis delay of cases living in district, suburban, rural increased in turn and presented significant difference (P = 0.000) among them. But, there was no significant difference between male and female (P = 0.462). (4) The median time of diagnosis delay were 17 days and 16 days for male and female and 10, 13, 18 and 20 days for cases of < 18, 18 ~ 44, 45 ~ 59 and ≥ 60 age groups respectively. It were 19, 17, 16 days for cases from suburbs, rural and urban and 20, 15, 12 and 8 days for cases visiting to comprehensive medical institutions, town health center and prison hospitals, chronic disease prevention hospitals respectively. Conclusion The overall situation of diagnosis delay for pulmonary tuberculosis have obtained continuous improvement in Yingde City, Guangdong. However its major influencing factors, including age, residence, medical institution, etc, must be payed more attention and suitable new strategies and measures must be formulated and fulfilled. [ABSTRACT FROM AUTHOR]

Based on the data from observational stations in Guangdong, the NCEP/NCAR reanalysis data, and the NOAA sea surface temperature (SST) data for the last 50 years from 1971 to 2020, this paper has analyzed the temporal and spatial distribution characteristics of temperature and precipitation during the Spring Festival travel rush in Guangdong. Possible causes of three types of climate anomalies are also investigated through comparison. The results are as follow: Over these five decades, the average temperature in Guangdong, especially in the Pearl River Delta and eastern Guangdong, showed a significant upward trend during the Spring Festival travel rush. Meanwhile, the number of rainy days in Guangdong, especially in northwestern Guangdong and the coastal regions of eastern/western Guangdong, showed a significant decreasing trend. There were totally 21 abnormal years with different concurrent variation between temperature and precipitation, including four cold and wet years, six cold and dry years, and eleven warm and dry years. In cold and wet years and cold and dry years, the meridional circulation prevailed over the mid‐high latitudes of Eurasia and the Siberian high pressure was relatively strong, which were favorable for the southward invasion of cold air. In particular, the pattern with northward higher and southward lower geopotential height was found over the western part of East Asia during cold and wet years while over the eastern part of East Asia during cold and dry years, respectively. Moreover, cold air invaded through the middle and the west paths when the geopotential height was higher eastward and lower westward over the low latitudes in cold and wet years. By contrast, in cold and dry years, cold air invaded through the east path when coincidently negative anomaly of geopotential height occupied the low latitudes. In short, transport of water vapor was favored during cold and wet years while depressed during cold and dry years. Furthermore, the equatorial central and eastern Pacific was warmer (colder) earlier in the cold and wet (cold and dry) years, which resulted in larger (smaller) and stronger (weaker) subtropical high over the western Pacific and colder (warmer) western Pacific warm pool. Thus, obvious anti-cyclonic (cyclonic) circulation was stimulated over the Philippine Sea area, which promoted (depressed) the southwestward water vapor transport and generated more (less) precipitation in Guangdong. In warm and dry years, zonal circulation prevailed and the pattern with northward lower and southward higher geopotential height was found over the mid-high latitudes of East Asia. Moreover, both East Asian trough and Siberian high were weak, which were not favorable for the southward invasion of cold air. Guangdong was under the control of anticyclonic circulation, and thus divergence and sinking brought high temperature and less rainfall to Guangdong. [ABSTRACT FROM AUTHOR]

[Introduction] New energy storage is one of the important means to improve the system's adjustment ability, and it is an important part of building a new power system. It is necessary to clarify the market positioning of new energy storage, and to study and improve the cost allocation and price mechanism of new energy storage, which will help guide its health, orderly and efficient development. [Method] The relevant policies and operation of new energy storage at home and abroad were sorted out, the function and role of new energy storage in the power system was analyzed. Combined with the actual situation of Guangdong power system, the scale demand of new energy storage construction before 2030 was studied. Based on the current price mechanism in Guangdong, the energy storage economy of power generation, power grid (independent), user-side was estimated, the current situation and existing problems of Guangdong's new energy storage policies were analyzed. Guangdong's new energy storage supporting policies and mechanism suggestions were comprehensively put forward. [Result] From the perspective of peak shaving and frequency regulation, there is no urgent need for new energy storage in Guangdong before 2030, there is no clear cost recovery mechanism for new energy distribution and energy storage, and photovoltaics and onshore wind power have a small amount of cost digestion space for strong distribution of energy storage, offshore wind power does not have the cost digestion space for strong distribution of energy storage. The business model of grid-side (independent) energy storage is not yet clear, and benefits can be obtained through ancillary services and spot electricity price difference, but the operating rules need to be further clarified, and it is not yet economical. The user-side energy storage business model is relatively clear. According to the current peak-valley electricity price policy, it has certain economic benefits, but the investment recovery period is long and it faces the risk of policy changes. [Conclusion] The new energy storage is divided into two types: market-oriented and non-market-oriented. The former is invested by various market entities other than the power grid. Under reasonable prices and operating mechanisms, profits are obtained through market-oriented channels, and a reasonable new energy storage system is formed by market regulation. energy scale and layout; the latter is invested by the grid company, and the cost is recovered through the transmission and distribution price.

Wild rice is an important genebank for the breeding of new rice varieties. Since the first national survey and collection of wild rice resources in Guangdong from 1978 to 1980, remarkable achievements have been made in the conservation and utilization of wild rice germplasm resources: the National Germplasm Resources Nursery for Wild Rice and Guangdong Provincial Germplasm Resources Genebank for Rice have been established in Guangzhou. Till now, 5 188 wild rice accessions have been planted and conserved at the nursery, and seeds propagated from more than 4 000 accessions have been conserved in the genebank, covering 20 wild rice species. Two in situ conservation sites for Oryza rufipogon have been constructed, including one in Guangzhou and the other in Maoming, respectively. A wild rice resource conservation system combining nursery, seed genebank and in situ conservation has been formed. 156 varieties were bred directly or indirectly from Guangdong wild rice germplasm resources and approved by variety approval committees of various levels, including 18 nationally-approved varieties. Moreover, the quality of most of these varieties reached the national standard, ministry standard or provincial standard of high-quality grade 3 or above, indicating that the wild rice germplasm resources play an important role in the cultivation of high-quality rice varieties. However, the following main problems still exist in the conservation, breeding and utilization of wild rice germplasm resources in Guangdong Province: the layout of in situ wild rice conservation sites is incomplete, and the natural survival of wild rice is endangered; the facilities and equipment conditions for wild rice resource evaluation are not perfect, and the in-depth evaluation is insufficient, which affects the full use of wild rice resources. It is suggested to increase the investment in wild rice conservation and evaluation, strengthen the planning, construction and management of wild rice in situ conservation sites, enhance the innovation of excellent germplasm resources of wild rice, the creation of new breeding materials and the basic researches of related applications so as to promote greater achievements in the conservation and breeding utilization of wild rice resources.

Objective To investigate the species distribution and the antifungal susceptibility of fungi originating from positive blood cultures in Guangdong, so as to provide a basis for the rational use of antifungal drugs in clinical fungal bloodstream infections. Methods All data were collected for retrospective study from monitoring units of the Guangdong Fungal Disease Surveillance Network between 2019-2021, including clinical characteristics, species distribution and antifungal susceptibility. Results A total of 3 589 fungi strains were isolated, most of which were Candida spp. (86.5%, 3 105/3 589). The most common species was Candida albicans (36.6%, 1 315/3 589), followed by Candida tropicalis (17.4%, 1 626/3 589) and Candida parapsilosis (14.5%, 520/3 589). There were 42.1%(1 512/3 589) of strains isolated from ICU. The proportions of Candida albicans strains were 40.0%-50.0% among ICU, general surgery, organ transplantation and emergency department. Candida tropicalis (60.0%, 144/240) was the most common species in hematology department. Both Cryptococcus neoformans (35.4%, 69/195) and Talaromyces marneffei (35.9%,70/195) were common in infection department. All of the Candida isolates were of wild-type (WT) phenotype to amphotericin B. Resistance rates of caspofungin and micafungin for Candida spp. ranged from 0.0% to 4.2%. The resistance rates of Candida tropicalis to fluconazole and voriconazole were 42.3% and 38.9%, which were significantly higher than other common Candida spp. The cryptococcus neoformans strains were totally of WT phenotype to fluconazole and voriconazole. Conclusions Candida albicans is the most common species originating from positive blood cultures in Guangdong Province. Common Candida strains are highly sensitive to echinocandins and amphotericin B. Candida tropicalis has a high resistance rate to triazole drugs. [ABSTRACT FROM AUTHOR]

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Copyright of New Architecture is the property of New Architecture Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Based on the daily maximum temperature data during 1961--2020 from 86 national meteorological observation stations in Guangdong Province, an objective method was introduced to identify cluster high temperature events. The intra-annual variations and changing trends of frequency, intensity, duration, and spatial influence range in each event were revealed. The results showed that the cluster high temperature events in Guangdong Province occurred from April to October each year. A quasiunimodal distribution with peak in July was shown in the intra-annual characteristics of frequency, intensity, duration, and spatial influence range. Overall, cluster high temperature events in Guangdong increased significantly in both time and space scales, with an abrupt increase in the 1990s. It is noteworthy that the frequency of short-duration cluster high temperature events slightly decreased, whereas that of the long-duration equivalent significantly increased over the recent 60 years. Such change poses a greater challenge to local government's disaster prevention and mitigation work and thus deserves more attention. [ABSTRACT FROM AUTHOR]

Seashore saline soil is a kind of soil formed after the sediments flowing into the sea with surface runoff or shallow sea sediments lifted up by wind and waves, flocculated and deposited in the intertidal zone under the action of tides and ocean currents, and finally exposed to the sea surface as the result of continuously silting up. The seashore saline soil in Guangdong Province is rich in resources, mainly distributed in Zhanjiang, Zhuhai, Jiangmen, Shantou and other places, and has an extremely important strategic position in the coastal economic development. Seashore saline soil is one of the main types of low and medium yielding fields, and the soils are characterized by high salt content and salinization. Due to the high nutrient content, rich soil organic matter and high potential fertility, they can become good fields through appropriate improvement measures. The management strategies of seashore saline soil utilization include isolating seawater from invading farmland again through engineering measures; improving drainage and irrigation conditions, applying rainwater dewatering and desalination technology, using artificial dewatering and desalination technology, planting combined with dewatering and desalination technology and other measures to drain and reduce salt. The sustainable utilization of seashore saline soil can be realized through soil improvement, scientific fertilization, root strengthening cultivation, selection of rice varieties resistant to salt or aquatic crop rotation and other technical measures. The seashore saline soil is an important reserve resource for the future development of arable land in Guangdong Province, and the full development and utilization of seashore saline soil is of great significance in increasing the sown area of grain, expanding arable land resources and ensuring food security . Based on the current situation of seashore saline soils in Guangdong, it is proposed to attach great imporntance to the special investigation of eashore saline soil resources, strengthen financial investment, promote scientific research, and establish long-term positioning observation stations for comprehensive management. [ABSTRACT FROM AUTHOR]

Objective To learn the situation of the evolution process of HCV virus population and the selection pressure of HCV NS5B in intravenous drug users (IDUs) in Guangdong. Methods 141 blood samples from hepatitis C virus (HCV) RNA-positive blood donors and 58 from HCV patients in Guangdong were randomly collected for HCV NS5B sequence amplification, combined with HCV NS5B sequences from blood donors and IDUs obtained by sequencing previously(between 2009 and 2011). Homology analysis was performed by Molecular Evolutionary Genetics Analysis (MEGA) software, evolutionary analysis were performed by Bayesian Evolutionary Analysis Sampling Trees (BEAST) software package. Selection pressure analysis was performed on sequences isolated from IDUs by Datamonkey online software package with Mixed Effects Model Evolution (MEME) method, and the population expansion of species were analyzed using Tajima and Fu neutrality test by Arlequin software. Results The comparison results of internal homology among different subtypes of IDUs in this group were as follows : HCV-3b had the highest homology (97%), followed by HCV-3a (96%), HCV-6a (95%) and HCV-1b (94%); HCV evolution rate analysis showed that HCV-1b had the fastest evolution rate [2.17E-03 substitutions/site/year (y/y/y)], followed by HCV-3b (2.12E-0 y/y/y), HCV-3a (1.58E-03 y/y/y) and HCV-6a (1.28E-03 y/y/y). The analysis on effective population of HCV: 1980~1990 was rapid growth period for HCV-6a, 1990~1995 period for HCV-1b, and 2000~2007 period for HCV-3a. HCV population genetic characteristics was as follows: HCV-1b, 3a, 3b and 6a experienced population expansion, among which 3a and 3b were the most obvious. As to the analysis of HCV selection pressure, two positive selection sites (235 and 243)were found in the 339 nucleotide fragment of the NS5B sequence in injecting drug users, but mutation only occurred at position 316 [mutation rate 1.24% (14/1 130)] among 5 direct antiviral drug (DAA) sites in this gene. Conclusion The evolution of HCV-3b in Guangdong has showed an obvious trend of population expansion, with a high proportion and homology especially in the local IDUs. HCV-3b should be the focus of HCV prevention and control in this region. Given that the positively selected sites of the HCV NS5B gene region of IDUs in Guangdong are non-DAA binding sites, DAA is expected to demonstrate a good effect on these patients.

Background The improvement of the overall health of residents and the sound development of the hierarchical medical system require the support of a large number of qualified general practitioners (GPs) . As of the end of 2020, the GPs-population ratio in Guangdong reached 3.13/10 000, but the job satisfaction of GPs has not received enough attention. Objective To assess the level and determinants of overall job satisfaction among GPs in Guangdong's primary care settings. Methods A self-administered questionnaire survey was conducted with 8 710 GPs selected from Guangdong's primary care settings by use of stratified, multistage cluster sampling from July 5th to 31st, 2021. The information collected include GPs' demographics, and services of GPs' teams as well as job satisfaction assessed using Minnesota Satisfaction Questionnaire-Short Form (MSQ-SF) . The determinants of job satisfaction were identified using the multiple linear regression model and analyzed using SPSS Statistics 24.0. Results The survey obtained a response rate of 68.96% (6 006/8 710) . The overall satisfaction score of the respondent GPs was (3.70±0.87) points. The three highest-ranked items in terms of score were "The chance to do things for other people"〔 (4.03±0.64) points〕, "The chance to work aloneon the job"〔 (4.02±0.69) points〕, and "The way my co-workers get along with each other"〔 (3.99±0.61) points〕. The items scored relatively lower were "My pay and the amount of work I do"〔 (2.98±1.04) points], "The chances for advancement on this job"〔 (3.19±0.92) points〕, and "The praise I get for doing a good job"〔 (3.39±0.93) points〕. Multiple linear regression analysis found that annual income, administrative position, having a core position in the team, having privileged access to getting an appointment with experts working in secondary or tertiary medical institutions, providing long-term prescribing services for chronic diseases, delivering home sick-bed services, studying occupation-specific knowledge by oneself, and communicating with other teams for exchanging experience were associated with the job satisfaction of GPs (P

China is a country with the largest pig industry and the largest consumer of pork. The pork production in China directly affects the "vegetable basket" of urban and rural residents. With the rapid economic development, the scale of pig industry in Guangdong tops the forefront of the country. However, the pig production of Guangdong is not enough to meet the demand of local people, and pigs were brought in from neighboring provinces of Guangxi, Hunan, Hainan, Fujian and Jiangxi each year. Understanding the changes of pig production in Guangdong will help to adjust production mode and increase pig production. After thorough analysis on the pig production data in Guangdong Rural Statistical Yearbook, the results showed that the pig production capacity of Guangdong Province was increased rapidly at the early stage of the reform and opening-up and to relatively stable after the "11th Five-Year Plan". Pig production capacity was gradually transferred from the Pearl River Delta, the rapid economic development region, to the western and northern of Guangdong. Furthermore, the efficiency of pig breeding has been continuously improved and the pig breeding scale is transforming from the initial phenomena of "small, scattered and disorderly" to large-scale and intensive. At present, the pig industry in Guangdong is faced with difficulties in land use, great pressure on environmental protection, persistent epidemics, high breeding costs and other problems. In view of the problems existing in the pig industry in Guangdong Province, corresponding development countermeasures are proposed to promote the pig industry to the development of high efficiency, industrialization and ecology, which include strengthening the prevention and control of major epidemics to create a safe production environment; strengthen ing the transformation of breeding equipment to improve production efficiency and production safety; reasonably planing pig breeding to promote ecological breeding; optimizing policies and regulations to improve the breeding willingness of farmers.

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Copyright of Mountain Research (10082786) is the property of Mountain Research Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

By using the methods of literature, interviews and field investigation explores the historical evolution of ice and snow sports in Guangdong, and examines the cultural characteristics and laws presented at different stages of its development from the perspective of three levels of cultural structure. The study shows that Guangdong ice-snow culture, which has been affected by climate, economy, science and technology and other factors, has been in blank for a long time . The policy of reform and opening-up and the strategy of Expanding Winter Sports from the North to the South and West have spawned such sports in Guangdong. The Beijing Winter Olympics have strongly catalyzed the rapid progress of ice-snow culture of Guangdong. The focus of the development of Guangdong ice and snow sports is on progressing along the outer, middle and inner layers of culture and integrating with each other. In the post-Winter Olympic era, we should take the following paths, such as learning from the experience at home and abroad, continuing to strengthen the construction of the outer and middle layers of ice and snow culture to further reinforce the cultivation of winter sports, and playing the reverse role of winter culture, so as to realize the high-quality development of ice and snow sports in Guangdong. [ABSTRACT FROM AUTHOR]

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Copyright of Science Technology & Industry is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BackgroundCervical cancer is the most common cancer threatening women's health that calls for strengthened dynamic monitoring and early warning.ObjectiveTo perform a spatiotemporal analysis of cervical cancer prevalence in Guangdong from 2015 to 2019, providing a decision-making basis for relevant government departments to take targeted prevention and treatment measures for cervical cancer.MethodsIn May 2021, data of 5-year (2015—2019) cervical cancer prevalence in 20-64-year-old female Guangdongers living in Guangdong's 21 cities were collected for analysis at the provincial and municipal levels. Average annual growth rate for descriptive analysis. ArcGIS 10.6 was used for spatial visualization, spatial autocorrelation analysis and hot spot analysis (Getis-Ord Gi) .ResultsDuring 2015—2019, cervical cancer prevalence in Guangdong declined from 50.28/100 000 to 49.84/100 000. The highest average annual growth rate of cervical cancer prevalence was in Meizhou (76.05%), and the lowest was in Chaozhou (-52.81%). In 2019, Jieyang (210.40/100 000) was found to have the highest cervical cancer prevalence, followed by Maoming (127.34/100 000) and Yangjiang (108.05/100 000). In 2018, global spatial correlation (Global Moran's I value=0.364, P

ObjectiveTo analyze the intake and source of fat and fatty acids of urban residents in Guangdong Province.MethodsResidents aged 3 years and above were selected by multi-stage stratified cluster sampling method in 5 cities in Guangdong Province from 2017 to 2018, and non-continuous 3 d-24 h retrospective survey was conducted to collect the dietary intake information of the respondents.ResultsThe average daily energy intake and fat intake of urban residents in Guangdong Province were 1671.9 kcal and 69.2 g, and the energy proportion contributed from fat was 39.4%. The energy proportion contributed from fat of urban residents in big cities was higher than that in small and medium-sized cities (39.9% vs 39.0%, P < 0.05). 1.6% of the residents’ energy proportion contributed from fat was lower than 20%, 14.8% of the residents' proportion met the standard, and 83.6% of the residents’ proportion was 20%-30%. Fat intake mainly came from animal food (52.8%) and vegetable oil (30.9%). The proportion of total fat from vegetable oil in small and medium-sized cities was higher than that in large cities (32.7% vs 27.7%, P

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Copyright of Asian Journals of Ecotoxicology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The rubber industry was a new and huge potential strategic economic industry born in the process of modern Guangdong’s industrialization. With the help of the investment of overseas Chinese from Guangdong, Hainan Island formed a large-scale gum plantation park centering on Ding’an, Danxian and Lehui County, and the planting and cultivation technology of rubber was close to maturity. The area on the south bank of the Pearl River in Guangzhou became a gathering area for the gum manufacturing industry in Guangdong in modern times, and the number of factories and practitioners leaped to the forefront of the industry. The development of the rubber industry in Guangdong in modern times not only promoted the process of tropical island reclamation in our country, but also advanced the development of new industries and the transformation of social lifestyles. However, the extensive business model and the domestic demand-driven economic development mode also restricted the expansion of reproduction and national capital accumulation of the rubber industry in modern Guangdong [ABSTRACT FROM AUTHOR]

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Background Stroke severely influences the quality of human life, and imposes a great burden on the society, patients and their families. Although China has vigorously promoted the prevention and treatment of stroke, the prevalence of pre-hospital delay in stroke patients is still relatively high. The stroke pre-hospital delay behavioral intention may predict the possibility of stroke pre-hospital delay to some extent, but theassociated factors have rarely been studied. Objective To investigate the stroke pre-hospital delay behavioral intention and associated factors in residents. Methods Convenience sampling was used to select 645 Guangdong residents as the participants from July to September 2021. The Demographic Information Questionnaire developed by us, Chinese version of Ten-Item Personality Inventory, Chinese version of Perceived Social Support Scale, Simplified Coping Style Questionnaire and Stroke Pre-Hospital Delay Behavior Intention scale (SPDBI) were used in a survey for understanding the participants' personality characteristics, social support, coping styles and stroke pre-hospital delay behavioral intention. Multiple linear regression was used to explore the influential factors of stroke pre-hospital delayed behavioral intention. Results A total of 645 valid questionnaires were collected (92.1%) . Of the 645 respondents, 312 (48.4%) knew nothing about stroke, and 262 (40.6%) had heard of the formula "stroke 120". The stroke pre-hospital delay behavior intention of the participants was in the intermediate level〔mean SPDBI score (71.3±18.7) 〕. Compared with the Chinese norm, these respondents had higher mean dimension score of warning of stroke symptoms, but lower mean total score of SPDBI, and lower mean scores of four dimensions (rationalization of non-healthcare seeking behavior, symptom attribution, habitual response style, emergency system use) (P

The State Council of China has proposed the development and implementation of a 'land and space' ecological restoration plan, which is an essential component of ecological restoration, linking theoretical research to the application of land and space planning. Ecological network restoration is key to the systematic restoration of regional ecological functions. The fragmentation of regional habitats has blocked the exchange of species between island-like nature reserves, risking species degradation and weakening of ecological functions. This study uses the least cumulative resistance model to analyze potential ecological corridors. The nature reserves of Guangdong Province were used as the ecological source. Landscape types based on land-use categories, slope values based on a digital elevation model, and human interference based on land used for construction, were used as landscape, slope, human interference resistance surface correspondingly. The least-cost connectivity network was analyzed using a cost-connectivity tool in ArcGIS. The connections between the input nature reserves were considered as 1st level corridors and the connections between neighboring regions were considered as 2nd level corridors. By adding rivers and highway corridors to the 1st and 2nd level networks, we formed a Comprehensive Ecological Network (CEN). The CEN was evaluated using the α index, β index, γ index, and cost ratio. The results showed that: 1) In the Basic Ecological Network (BEN) composed of 1st and 2nd level potential ecological corridors, the α, β, and γ indices reached 0.54, 2.02 and 0.70, respectively, indicating that the BEN can enhance the structure of nature reserves in Guangdong Province and form effective linkages. 2) The river corridor of Guangdong Province, with its characteristic dendritic structure, improves the corridor structure and increases connectivity. By adding river corridors to the BEN we formed a River Ecological Network (REN), which has a more complete structure. However, because the river itself is a factor of greater resistance to the cross-strait matrix connectivity, the REN's α index (0.33), β index (1.64) and γ index (0.55) are lower than those of the basic ecological network. 3) By adding road corridors to the REN, we formed the CEN. The CEN's α, β, and γ indices reached 0.68, 2.34 and 0.79, respectively, indicating that the addition of road ecological corridors can compensate for the weakness of the REN, increase network closure, smoothen material and energy circulation, and increase the number of paths available for species diffusion, which plays an important role in stabilizing the ecological network. In the context of the current ecological restoration of territorial space, we suggest that 47 1st level ecological corridors and 52 ecological nodes should be constructed and restored. These corridors would connect to the Zhanjiang Mangrove National Nature Reserve in the west, Nanling National Nature Reserve in the north, Fengxi Provincial Nature Reserve in Dapu, Meizhou in the east, and Lianhua Mountain in the Huidong-Baipenzhu Water Source Forest Nature Reserve in the south, forming the primary ecological security network of Guangdong's nature reserves. The effects of this network would include: reducing the islanding effect of the nature reserves; promoting species exchanges between nature reserves; enhancing regional ecosystem service functions; and providing the core framework of ecological restoration and ecological security in Guangdong Province. This corridor analysis was performed at a regional scale, limiting its application when restoration work is on a small scale, such as a city or county. Therefore, more specific research is required.

Rainstorms in Guangdong have the characteristics of high intensity, wide range and long season, causing severe flood disasters and great impacts. In order to make rational and quantitative assessment on the intensity and loss caused by rainstorms and floods in Guangdong, a comprehensive intensity assessment model and disaster index model were constructed and proposed in this study, based on analysis of the rainstorm events and their corresponding loss data in Guangdong from 1994 to 2018. By using the 60th, 80th, 90th and 95th percentiles as critical thresholds, the rainstorm events were classified into five categories, namely, Ⅰ (week), Ⅱ (relatively week), Ⅲ (medium), Ⅳ (relatively strong), and Ⅴ (strong) according to their intensity. They were also categorized as micro disaster, small disaster, medium disaster, major disaster, and catastrophe according to their severity in terms of disaster loss. The possible losses of population, crops, houses and economy caused by rainstorm events of different categories were then analyzed. The results indicated that: (1) During 1994-2018, the rainstorm events with different categories in Guangdong mainly occurred in the flood season, i.e. from April to September, especially from May to July. (2) The intensity of the rainstorm events had a significant positive correlation with the disaster index of various hazard-bearing bodies. With increasing intensity of the rainstorm events, the number of collapsed houses increased exponentially, while the number of people affected, the number of deaths, affected areas of crops and direct economic losses all increased linearly. (3) When the intensity of the rainstorm events reached up to category Ⅴ (strong), the averaged values of the number of people affected, the number of deaths, affected areas of crops, the number of collapsed houses and direct economic losses are 1 871 900 people, 22 people, 105 200 hectares, 112 thousand rooms and 1.307 billion Yuan, respectively.

Objective To understand the health literacy and analyze its influencing factors among residents in Liwan of Guangdong. Methods The method of stratified multi-stage random sampling were used to investigate the health literacy level of 1 094 permanent residents aged 15-69 years old in Liwan District. Results The level of health literacy among residents in Liwan in 2018 was 20.93%.The health literacy levels of basic knowledge and concepts, healthy lifestyles and behaviors, health skills were 38.12%,21.12%,20.38%,respectively.Kendall correlation analysis showed that there was a significant correlation between the three aspects of health literacy (P<0.05）.Among the six aspects of health problems, the highest level of health literacy was 52.19% for safety and first aid, and the lowest was 15.81% for the prevention and control of infectious diseases. Logistic regression analysis demonstrated that compared with 15-<20 years old,60-69 years old was a risk factor for health literacy [odds ratiol (OR）=0.261].Compared with elementary school and below, college/undergraduate, master and above were the protective factors of health literacy (OR=3.187,3.912,respectively）.Compared with residents’ families with an annual income of less than 10 000,residents with an annual income of more than 300,000 had the highest level of health literacy (OR=5.552）.Conclusion The health literacy level among residents in Liwan of Guangdong is ordinary. The three aspects of health literacy promote each other and need to be improved in coordination. It is urgent to improve the quality of infectious disease prevention and treatment. Key investments should be made to the elderly with low educational levels and family annual income. [ABSTRACT FROM AUTHOR]