Hevea brasiliensis is the main source of natural rubber. Restricted by its tropical climate conditions, the planting area in China is limited, resulted in a low self-sufficiency. Periploca sepium which can produce natural rubber is a potential substitute plant. cis-prenyltransferase (CPT), small rubber particle protein (SRPP) and rubber elongation factor (REF) are key enzymes involved in the biosynthesis of cis-1, 4-polyisoprene, the main component of natural rubber. In this study, we cloned the promoter sequences of CPT, SRPP and REF through chromosome walking strategy. The spatial expression patterns of the three promoters were analyzed using GUS (β-glucuronidase) as a reporter gene driven by the promoters through Agrobacterium-mediated genetic transformation. The results showed that GUS driven by CPT, SRPP or REF promoter was expressed in leaves and stems, especially in the leaf vein and vascular bundle. The GUS activity in stems was higher than that in leaf. This study provided a basis for analyzing the biosynthesis mechanism of natural rubber and breeding new varieties of high yield natural rubber.
Peptide Elongation Factors/genetics* ; Plant Proteins/metabolism* ; Periploca/metabolism* ; Rubber ; Plant Breeding ; Cloning, Molecular

PURPOSE: The aim of this study was to compare the effect of different finishing and polishing techniques on water absorption, water solubility, and microhardness of ceramic or glass-polymer based computer-aided design and computer-aided manufacturing (CAD/CAM) materials following thermocycling. MATERIALS AND METHODS: 150 disc-shaped specimens were prepared from three different hybrid materials and divided into five subgroups according to the applied surface polishing techniques. All specimens were subjected up to #4000 grit SiC paper grinding. No additional polishing has been done to the control group (Group I). Other polishing procedures were as follows: Group II: two-stage diamond impregnated polishing discs; Group III: yellow colored rubber based silicone discs; Group IV: diamond polishing paste; and Group V: Aluminum oxide polishing discs. Subsequently, 5000-cycles of thermocycling were applied. The analyses were conducted after 24 hours, 7 days, and 30 days of water immersion. Water absorption and water solubility results were analyzed by two-way ANOVA and Tukey post-hoc tests. Besides, microhardness data were compared by Kruskal-Wallis and Mann-Whitney U tests (P<.05). RESULTS: Surface polishing procedures had significant effects on water absorption and solubility and surface microhardness of resin ceramics (P<.05). Group IV exhibited the lowest water absorption and the highest microhardness values (P<.05). Immersion periods had no effect on the microhardness of hybrid ceramic materials (P>.05). CONCLUSION: Surface finishing and polishing procedures might negatively affect physical properties of hybrid ceramic materials. Nevertheless, immersion periods do not affect the microhardness of the materials. Final polishing by using diamond polishing paste can be recommended for all CAD/CAM materials.
Absorption ; Aluminum Oxide ; Ceramics ; Computer-Aided Design ; Dental Polishing ; Diamond ; Immersion ; Rubber ; Silicon ; Silicones ; Solubility ; Water

BACKGROUND: Closed reduction of nasal fracture with various instrument is performed to treat nasal fracture. Depending on the type of nasal fracture and the situation in which it is being operated, the surgeon will determine the surgical tool. The objective of this study was to investigate whether a periosteal elevator (PE) was a proper device to perform closed reduction for patients with simple nasal fractures. METHODS: From March 2018 to December 2018, 50 cases of simple nasal bone fracture underwent closed reduction performed by a single surgeon. These patients were divided into two groups randomly: nasal bone reduction was performed using only PE (freer) and nasal bone reduction was performed using Walsham, Asch forcep, and Boies elevator (non-freer, non-PE). RESULTS: The paranasal sinus computed tomography was performed on patients before and after operation to carry out an accurate measurement of reduction distance at the same level. According to the results, the interaction between instruments and fracture types had a significant influence on reduction distance (p = 0.021). To be specific, reduction distance was significantly (p= 0.004) increased by 2.157 mm when PE was used to treat patients with partial displacement compared to that when non-PEs were used. CONCLUSION: Closed reduction using PE and other elevator is generally an effective treatment for nasal fracture. In partial-displacement type of simple nasal fracture, closed reduction using PE can have considerable success in comparison with using classic instruments.
Elevators and Escalators ; Facial Bones ; Fractures, Closed ; Humans ; Nasal Bone ; Rubber ; Surgical Instruments ; Treatment Outcome

Complex suicide refers to a type of suicide that leads to death using two or more methods. We report three cases of unique and rare examples of complex suicide, with the plan of the second and/or third method working simultaneously if the first suicidal attempt had failed. In the first case, the victim used three methods of asphyxia: hanging by a safety belt, plastic bag suffocation, and self-ligature strangulation by stretching rubber bands within the vehicle. In the second case, the victim hanged himself with electrocution by attaching electrical leads to the right side of his head. In the third case, the victim with the intention of drowning jumped 20 m above the water surface on the bridge by tying metal chains to the bridge rail and self-immolation by gasoline. Planned complex suicide involves more successful methods to commit suicide and may conversely be camouflaged as suicide in murder case.
Asphyxia ; Drowning ; Gasoline ; Head ; Homicide ; Intention ; Methods ; Plastics ; Rubber ; Suicide ; Water

A new species of Alternaria causing leaf spots on the rubber tree (Hevea brasiliensis) in Yunnan, China, was isolated, examined, and illustrated. Morphologically, it belongs to the section Porri of Alternaria, which produces relatively large conidia and a simple or branched, filamentous long beak. It is, however, characterized by conidiophores gradually enlarging near the apex into a clavate conidiogenous cell and long ellipsoid to obclavate, smooth-walled conidia with a long filamentous beak. Molecular phylogenetic analyses based on ITS rDNA, GAPDH, and TEF1-alpha sequences demonstrate that the phytopathogen falls in the clade of the section Porri, being most closely related to A. sidae, A. sennae, A. deseriticola, A. cyamopsidis, A. rostellata, A. nitrimali, A. crassa, and A. thunbergiae.
Acanthaceae ; Accidental Falls ; Alternaria ; Animals ; Ascomycota ; Beak ; China ; Classification ; DNA, Ribosomal ; Hevea ; Rubber ; Spores, Fungal

This case report describes a technique in which endodontic treatment and permanent indirect restoration were completed in the same clinical appointment with the aid of a computer-aided design/computer-aided manufacturing (CAD/CAM) system. Two patients were diagnosed with irreversible pulpitis of the mandibular first molar. After access preparation, root canals were located, irrigation was performed until bleeding ceased, and the coronal tooth structure was prepared for indirect restoration. Then, utilizing an interim 3-mm build-up of the endodontic access cavity, a hemi-arch digital scan was performed with an intraoral scanner. Subsequent to digital scanning, restoration design was performed simultaneously with the endodontic procedure. The root canals were shaped using the Race system under irrigation with 2.5% sodium hypochlorite followed by root canal filling. The pulp chamber was subsequently filled with a 3-mm-thick composite resin restoration mimicking the interim build-up previously utilized to facilitate block milling in the CAD/CAM system. Clinical try-in of the permanent onlay restoration was followed by acid etching, application of a 5th generation adhesive, and cementation of the indirect restoration. Once the restoration was cemented, rubber dam isolation was removed, followed by occlusal adjustment and polishing. After 2 years of follow-up, the restorations were esthetically and functionally satisfactory, without complications.
Adhesives ; Cementation ; Computer-Aided Design ; Continental Population Groups ; Dental Pulp Cavity ; Endodontics ; Follow-Up Studies ; Hemorrhage ; Humans ; Inlays ; Molar ; Occlusal Adjustment ; Pulpitis ; Rubber Dams ; Sodium Hypochlorite ; Tooth

OBJECTIVE: This study was conducted to examine the effects of a health promotion program on the health condition of rural elderly women implemented at primary health care posts using Korean Frailty Index. METHODS: The research was designed a nonequivalent control group pretest-posttest setting. The participants in this study were 50 residents (intervention group: 25, control group: 25) selected from 4 villages 2 primary health care posts in J city Gyeongsangnam-do. The health promotion program was conducted at the primary health care posts twice a week for 12 weeks. This program consisted of basic exercises(Gukseondo + Theraband muscle strength training) and additional activities(including modified Theraband activity, rubber ball exercise, ball massage, nutrition class, singing class). Collected data were analyzed by descriptive statistics, paired t-test, and repeated measures ANOVA with SPSS 21.0. RESULTS: Results of the health promotion program showed that the health conditions(measured by perceived health status, frailty score, upper/lower flexibility, maximum grip strength, dynamic balance test Timed Up and Go) of the experimental group(25) all statistical significantly improved. CONCLUSION: Study findings indicate that the health promotion program implemented at primary health care posts on rural elderly women is effective and can contribute to a developed health promotion program for local residents in the future.
Aged ; Female ; Gyeongsangnam-do ; Hand Strength ; Health Promotion ; Humans ; Massage ; Muscle Strength ; Pliability ; Primary Health Care ; Rubber ; Singing

Prostate cancer is the second most common cancer in men worldwide. There are many occupational factors that have been suggested to cause prostate cancer. Our aim was to evaluate the evidence for causality by a literature review of occupational factors. We searched literature in Medline and SCOPUS from 1966 to June 30, 2015 to identify occupational risk factors for prostate cancer. The following risk factors were selected: farmers/agricultural workers, pesticides – whole group, and separately organophosphate and organochlorine pesticides, carbamates and triazines, cadmium, chromium, cutting fluids, acrylonitrile, rubber manufacturing, whole body vibration, shift work, flight personnel, ionizing radiation, and occupational physical activity. For each factor a literature search was performed and presented as meta-analysis of relative risk and heterogeneity (Q and I² index). A total of 168 original studies met the inclusion criteria with 90,688 prostate cancer cases. Significantly increased risks were observed for the following occupational exposures: pesticides (metaRR = 1.15, 95% confidence interval [CI] = 1.01–1.32; I² = 84%), and specifically group of organochlorine pesticides (meta relative risk [metaRR] = 1.08, 95% CI = 1.03–1.14; I² = 0%), chromium (metaRR = 1.19, 95% CI = 1.07–1.34; I² = 31%), shift work (metaRR = 1.25, 95% CI = 1.05–1.49; I² = 78%) and pilots (metaRR = 1.41, 95% CI = 1.02–1.94; I² = 63%) and occupational physical activity in cohort studies (metaRR = 0.87, 95% CI = 0.81–0.94; I² = 0%). The literature review supports a causal association for a few of the previously suggested factors.
Acrylonitrile ; Cadmium ; Carbamates ; Chromium ; Cohort Studies ; Epidemiologic Studies ; Humans ; Male ; Motor Activity ; Occupational Exposure ; Pesticides ; Population Characteristics ; Prostate ; Prostatic Neoplasms ; Radiation, Ionizing ; Risk Factors ; Rubber ; Triazines ; Vibration

Metabolic abnormalities and catheter-related infections are common complications of parenteral nutrition (PN). Particulate contamination is a catheter-related complication can occur when administering PN: mixing the electrolytes, trace elements, vitamins into the PN, or puncturing a rubber stopper at the PN formulation. In addition, the aggregation of the components of the PN solution by a drug incompatibility reaction could be related to particulate contamination. PN contaminated with precipitates, insoluble particles, and bacteria was reported as the cause of the death of a patient. The Food and Drug Administration recommended that the filters be used during PN administration. In-line filters can retain the bacteria and insoluble particles in PN solutions, and prevent their infusion into the patient. Therefore, in-line filters are recommended to prevent catheter-related complications that can occur during PN infusion. A 0.2µ filter for lipid-free PN and a 1.2µ filter for lipid-containing PN solutions can be used. On the other hand, when a filter is applied, the infusion rate can decrease and the economic burden will increase for patients requiring long-term PN. In addition, small particles, such as viruses, polymers, and proteins cannot be filtered out completely. In conclusion, in-line filers are recommended to prevent catheter-related complications that can occur during PN administration, but there are no international standardized guidelines. Therefore, standardized guidelines will be needed based on evidence accompanied by clinical trials. In addition, in-line filter applications should be considered in the clinical field depending on the patient's condition.
Bacteria ; Catheter-Related Infections ; Drug Incompatibility ; Electrolytes ; Filtration ; Hand ; Humans ; Parenteral Nutrition ; Polymers ; Rubber ; Trace Elements ; United States Food and Drug Administration ; Vitamins

BACKGROUND: Oral diseases are caused by various systemic and local factors, the most closely related being the biofilm. However, the challenges involved in removing an established biofilm necessitate professional care for its removal. This study aimed to evaluate and compare the effects of professional self and professional biofilm care in healthy patients to prevent the development of periodontal diseases. METHODS: Thirty-seven patients who visited the dental clinic between September 2018 and February 2019 were included in this study. Self-biofilm care was performed by routine tooth brushing and professional biofilm care was provided using the toothpick method (TPM) or the oral prophylaxis (OP) method using a rubber cup. Subgingival bacterial motility and halitosis (levels of hydrogen sulfide, H₂2S; methyl mercaptan, CH₃SH; and di-methyl sulfide, (CH₃)₂S) were measured before, immediately after, and 5 hours after the preventive treatment in the three groups. Repeated measures analysis of variance test was performed to determine significant differences among the groups. RESULTS: TPM was effective immediately after the prevention treatment, whereas OP was more effective after 5 hours (proximal surfaces, F=16.353, p<0.001; smooth surfaces, F=66.575, p<0.001). The three components responsible for halitosis were effectively reduced by professional biofilm care immediately after the preventive treatment; however, self-biofilm care was more effective after 5 hours (H₂S, F=3.564, p=0.011; CH₃SH, F=6.657, p<0.001; (CH₃)₂S, F=21.135, p<0.001). CONCLUSION: To prevent oral diseases, it is critical to monitor the biofilm. The dental hygienist should check the oral hygiene status and the ability of the patient to administer oral care. Professional biofilm care should be provided by assessing and treating each surface of the tooth. We hope to strengthen our professional in biofilm care through continuous clinical research.
Bacteria ; Biofilms ; Dental Care ; Dental Clinics ; Dental Hygienists ; Halitosis ; Hope ; Humans ; Hydrogen Sulfide ; Methods ; Oral Health ; Oral Hygiene ; Periodontal Diseases ; Rubber ; Tooth