Cultural Practices for Edible Roses in the Open Field in Tropical Areas

The edible rose was planted on trial in Hainan under the tropical oceanic climate environment according to its botanic characteristics and growth habit. A set of cultural practices suitable for the edible rose planted in Hainan was summarized, including land selection, land preparation, variety selection, planting requirements, field management, pruning, flowering regulation, and control of pests and diseases.

Evaluating Infrared Thermal Image’s Color Palettes in Hot Tropical Area

The use of Infrared Thermal Scanners proved to be very useful in lots of applications. Using different color palettes, temperatures can be well-represented in the resulting image. However, most color palettes in hot tropical places like the Philippines are unsuitable since the ambient temperature is almost the same as the scanned object or person. This study evaluates twelve (12) known and used color palettes in the market to determine the most suitable for tropical places using the edge/border tracing algorithms Sobel-Feldman and Laplacian. The result shows that color palettes with the most colors produce more noise, making it difficult to distinguish the object scanned from the background. On the other hand, color palettes with three or fewer contrasting colors produce crisp and more detailed results. This study helps developers and researchers efficiently use color combinations suitable for hot weather for an effective thermal scanning and image representation.

Autopsy results from a COVID-19 patient treated in a tropical area,and a review of the epidemiological history

Since the start of the COVID-19 pandemic,there has been an urgent need to produce accurate and sensitive tests.However,there have been instances where a positive nucleic acid test turns negative after treatment,and then positive again.This case report describes such an instance from the tropical region of Hainan,China.The patient was a 61-year-old female who went to Hainan on vacation from Wuhan during the COVID-19 pandemic in 2020.Symptoms appeared 9 d after arriving in Hainan,and it was confirmed that the nucleic acid test was positive after 4 repeats.Her condition declined rapidly,her heart stopped beating,and she was admitted in a coma to the ICU.After treatment,the SARS-CoV-2 virus nucleic acid test of several nasopharyngeal swabs were negative,and tests on whole blood,anal swabs,and urine were also negative.Later,however,nucleic acid tests on a lower respiratory tract sputum swab and lower respiratory tract lavage fluid were positive.An autopsy examination was carried out 12h after her death,and multi-organ secretions were extracted for nucleic acid testing.The SARS-CoV-2 virus nucleic acid was only detected in the swabs from the end of the bronchus,which was confirmed by the visualization of the coronavirus by electron microscopy.Autopsy confirmed that the damage was mainly concentrated in the lungs and immune organs and tissues throughout the body.Epidemiology indicated that none of the people she came into contact with after arriving in Hainan,including close contacts,were infected.This is in sharp contrast to the highly contagious virus in Wuhan in the temperate zone during the same period.This case report indicates:(1)The high temperatures in tropical areas may have an impact on the spread and harm of COVID-19,and(2)The reason why nucleic acid testing for COVID-19 was initially negative and then positive after treatment may be related to the survival of the SARS-CoV-2 virus in deep lung tissues.

Observation Research of the Turbulent Fluxes of Momentum, Sensible Heat and Latent Heat over the West Pacific Tropical Ocean Area

This paper describes results of the fluxes of momentum , sensible heat and latent heat for the West Pacific Tropical Ocean Area ( 127 ° E - 150 ° E , 5 ° N -3 ° S ). The data were collected by the small tethered balloon sounding system over this ocean area including 6 continuous stations (140 ° E. 0 ° ; 145 ° E, 0 ° ; 150 ° E, 0 ° ; 140° E, 5 ° N; 145 ° E, 5° N and 150 ° E, 5 ° N) from 11 October to 15 December, 1986 . These fluxes were calculated by the semiempirical flux-profile relationships of Monin-Obukhov similarity theory using these observed data. The results show that for this tropical ocean area the drag coefficient CD is equal to (1.53 ± 0.25) × 10 3 and the daily mean latent flux Hl is greater than its daily mean sensible flux HV by a factor of about 9.

Epidemiological characteristics of 168 cases of COVID-19 in Hainan Island, tropical China: A descriptive study

Objective:To understand the epidemic characters of COVID-19 epidemic in Hainan province of tropical China and provid evidences for the prevention and control of the epidemic.Methods:Data on the COVID-19 epidemic collected from Health Commission of Hainan Province were analyzed by using the methods of retrospective descriptive epidemiology.Results:From January 22nd to February 21st,2020,COVID-19 was diagnosed in 168 confirmed cases(including 8 severe cases)in Hainan Province with the temporary fatality rate of 2.38%of 4 deaths,and 96 cases discharged from hospital,with the cure rate of 57.14%.The cases were distributed in altogether 15 cities and counties in Hainan Province,among which 121 cases were distributed in Sanya,Haikou,Danzhou and Wanning,accounting for 72.02%of the total number of cases.Cases in Sanya City were mainly found in Tianya district and Jiyang district,accounting for 69.81%of the total number of cases in Sanya.Cases in Haikou City were mainly found in Qiongshan district and Xiuying district,accounting for 72.5%of the total number of cases in Haikou.Among the patients,there were 81 males and 87 females,with a male-to-female ratio of 1.1;the youngest age was 3 months,the oldest was 79 years old,80%of the patients were in the age group of 30 to 69 years old,and the number of children and adolescents under 20 years old were relatively low.Conclusion:The daily number of new confirmed cases showed a gradual downward trend in Hainan province,and the epidemic situation was in transition from imported to local renewal,mainly in close contact between family members.With the increase of personnel mobility such as the resumption of work by enterprises and the return of migrant workers to the island,there is a risk of agglomeration epidemic.Prevention and control work in urban and rural areas should take a two-pronged approach.Amid preventing imported cases,more proactive measures should be taken to prevent and control the spread of local cases.

Differential expression analysis of coronary heart disease related genes in Hainan residents

Objective:To explore the correlation between coronary heart disease related genes and coronary heart disease in hospitalized patients in Hainan,and to provide theoretical basis for enriching the screening methods of high-risk groups of coronary heart disease in Hainan,and optimizing the prevention and treatment strategies.Methods:We select hospitalized patients born in Hainan and aged>30 years old from the Second Affiliated Hospital of Hainan Medical Unversity between January 1,2020 and June 30,2022,and divided the patients into the coronary heart disease group and the non-coronary heart disease group.PCR real-time fluorescence was used to measure gene expression,and Spearman correlation analysis was used to explore the correlation between gene expression and coronary heart disease.Results:A total of 55 whole blood samples were collected from non-coronary heart disease patients(including 26 women and 29 men),with a median age of 57 years,and 170 whole blood samples from coronary heart disease patients(including 44 women and 126 men),with a median age of 63.17.Apolipoprotein B gene(ApoB)was highly expressed in patients with coronary heart disease(P<0.001);AGT gene(P=0.0158),ApoE gene(P=0.0126),FGB gene(P=0.005),GNB gene(P=0.0151),MTFHR gene(P=0.0119),SEL gene(P=0.005),TNF gene(P=0.0298)were significantly overexpressed in the non-coronary heart disease group.The expression of NOS3 gene(P=0.3047),IL6 gene(P=0.7239),ACE gene(P=0.7852)was not different between the two groups.Coronary heart disease was negatively correlated with AGT gene(r=-0.163,P=0.011,P<0.05),positively correlated with APOB gene(r=0.75,P=0,P<0.01),negatively correlated with FGB gene(r=-0.163,P=0.011,P<0.05),negatively correlated with GNB gene(r=-0.165,P=0.011,P<0.05),negatively correlated withSEL gene(r=-0.171,P=0.007,P<0.01),negatively correlated with MHTHR gene(r=-0.210,P=0.001,P<0.01)and negatively correlated with TNF gene(r=-0.131,P=0.04,P<0.05),but coronary heart disease was not correlated with APOE,NOS3,ACE,IL6 and other genes(P>0.05).The ApoB gene of coronary heart disease was negatively correlated with triglyceride(r=-0.461,P=0),positively correlated with age(r=0.173,P=0.009),positively correlated with total cholesterol(r=0.499,P=0),negatively correlated with high-density lipoprotein(r=-0.181,P=0.007),and negatively correlated with low-density lipoprotein(r=-0.143,P=0.031).Conclusion:(1)The detection of apolipoprotein B gene expression may be used as an indicator for screening coronary heart disease in the coronary population in Hainan.It may increase the risk of coronary heart disease by affecting the level of total cholesterol.A larger sample of research is still needed.(2)AGT,ApoE,FGB,GNB,MTFHR,SELE,TNF and other genes may be the protective genes of non-coronary heart disease population in Hainan,and the high expression of these genes may reduce the occurrence of coronary heart disease,which still needs further study.

Effect of ground corn cobs as a fiber source in total mixed ration on feed intake,milk yield and milk composition in tropical lactating crossbred Holstein cows

The aim of this study was to evaluate the effect of ground corn cobs(GCC) as a sole fiber source in total mixed ration(TMR) on feed intake, milk yield and milk composition in tropical lactating crossbred Holstein cows. Four multiparous crossbreds Holstein Friesian dairy cows with an initial body weight(BW) of 415.5 ± 26.20 kg were used in a 4 x 4 Latin square design. The dietary treatments of TMR contained a roughage-to-concentrate ratio of 40:60. The roughage source was used at different ratios of GCC to rice straw(RS) at 100:0, 82.5:17.5, 67.5:32.5, and 50:50 for TMR1 to TMR4, respectively. The results revealed significant improvements in intake of dry matter, protein,neutral detergent fiber(NDF)and metabolizable energy(ME) for TMR1 and TMR2(P < 0.05), while the digestibility of nutrients was not altered by the treatments(P > 0.05). Ground corn cobs was used for up to 100% of the total roughage without affecting milk production. Moreover, ruminal pH, temperature, ammonia-nitrogen(NH_3-N) and volatile fatty acid(VFA) concentrations were not impacted by the treatments(P> 0.05). However, milk yield was significantly different among the GCC:RS ratios(P < 0.05) and was the highest in TMR1 and TMR2(13.1 kg/d), while the milk compositions were not changed(P > 0.05). The results imply that using GCC as a whole roughage source significantly improved nutrients intake and milk yield in dairy cows raised in tropical areas.

Habitat components and population density drive plant litter consumption by Eudrilus eugeniae(Oligochaeta)under tropical conditions

The ingestion of organic and mineral materials by earthworms is a prominent functional role that has profound consequences for the decomposition and stabilization of soil organic matter.To investigate the litter consumption of the African nightcrawler earthworm Eudrilus eugeniae under different tropical conditions,we used DNA barcoding to identify specimens of E.eugeniae collected from sites across the Adamawa region in Cameroon,and studied the influence of habitat suitability(soil properties),soil moisture,litter type,and population density on litter consumption.A total of four litter consumption experiments were carried out using soils collected from refuse disposal sites,agricultural lands,and savannahs dominated by the Mexican sunflower Tithonia diversifolia.The results revealed that litter consumption significantly increased in the refuse disposal and agricultural soils as opposed to the Mexican sunflower(T.diversifolia)soil,a cow dung enriched substrate,and a sterile soil horizon from the savannah(P<0.05).The optimum moistures for litter consumption were between 24%and 50%.Litter type did not affect the consumption rate of the earthworms(P>0.05).We observed a general positive density-dependent consumption with litter mass loss increasing with increasing density.Our results suggest that E.eugeniae has a strong direct effect on the decomposition of plant materials than expected from previous estimations,and that litter consumption rates are determined by several habitat components and population density.