Fluorescence properties of novel deep-red phosphor LiMgSbO:Mn with excellent quantum efficiency and color purity for warm white LEDs.

Red fluorescent materials have important application value in the background light and LED lighting fields of displays. In this work, a novel type of rare earth free deep-red phosphor LiMgSbO:Mn was prepared successfully, and its crystal structure, microstructure, fluorescence spectrum, quantum yield, thermal stability, fluorescence lifetime, color coordinates and color purity were studied in detail. The excitation spectra of LiMgSbO:Mn phosphors are located at 200-600 nm, which can be matched with ultraviolet, near-ultraviolet, and blue-light chips.

Separation, identification, and structural characterization of sucrose ester isomers from tobacco.

Sucrose esters (SEs) are crucial tobacco smoke flavor precursors and play a significant role in tobacco's functionality. Due to their structural complexity, the separation and analysis of SEs in tobacco remain a major challenge, and massive structures of SEs have not yet been fully identified. In this study, the fractions enriched in SEs were obtained from oriental and flue-cured tobacco through a series of pretreatments, and two types of SEs (Types I and II) were distinguished by liquid chromatography-tandem mass spectrometry (LC-MS ) analysis, with Type II SEs newly characterized in tobacco.

A Leymus chinensis histidine-rich Ca-binding protein binds Ca/Zn and suppresses abscisic acid signaling in Arabidopsis.

Intracellular Ca plays an essential role in plant cellular sensing of various environmental stress signals by modulating the activity of Ca-binding proteins. Leymus chinensis is a dominant forage grass widely distributed in the Eurasian Steppe that is well adapted to drought and salty soils common in the region. Through transcript profiling of L.

Arabidopsis thaliana branching enzyme 1 is essential for amylopectin biosynthesis and cesium tolerance.

Arabidopsis thaliana BRANCHING ENZYME 1 (AtBE1) is a chloroplast-localized embryo-lethal gene previously identified in knockout mutants. AtBE1 is thought to function in carbohydrate metabolism; however, this has not been experimentally demonstrated. Chlorosis is a typical symptom of cesium (Cs) toxicity in plants.

Extracellular Ca induces desensitized cytosolic Ca rise sensitive to phospholipase C inhibitor which suppresses root growth with Ca dependence.

Calcium (Ca) is an essential element for all organisms. In animal cells, the plasma membrane-localized Ca receptor CaSR coupled to a phospholipase C (PLC)-dependent signaling cascade monitors extracellular Ca concentrations ([Ca]) and responds with increases in cytosolic calcium concentrations ([Ca]). Plant roots encounter variable soil conditions, but how they sense changes in [Ca] is largely unknown.

[Regulatory effect of Bushenfang on the serum testosterone level of naturally aging rats and its mechanism].

Objective: To study the regulatory effect of Bushenfang on the serum testosterone (T) level of naturally aging rats and its mechanism, in order to provide a theoretical and experimental basis for the clinical treatment of late onset hypogonadism (LOH) in males.

Methods: Thirty-two 18-month-old male SD rats were randomly divided into four groups of equal number, naturally aging model and low-, medium- and high-dose Bushenfang groups, and another eight 4-month-old rats were taken as normal controls. The rats of the aging model and normal control groups were treated with normal saline, while those of the low-, medium- and high-dose Bushenfang groups received intragastrically Bushenfang at 3.

[Evaluation on the effects of education regarding road safety among middle school students].

Objective: To evaluate the intervention effects for road traffic accident prevention among middle school students through understanding their knowledge, attitude and practice (KAP) on road safety.

Methods: Students in Grade 1 and Grade 2 from 7 junior and senior middle schools in Ji'nan city were selected as intervention group and students from a middle school in Hefei city served as control group. Education was provided to the intervention group and all the middle school students in Ji'nan city.

[Risk factors on road traffic accidents in middle school students: a matched case-control study].

Objective: To investigate the predictors of road traffic accidents (RTAs) in middle school students, a case-control study was designed to seek new clues for prevention and control on RTAs in this population.

Methods: Cases were 116 students who experienced RTAs from 2005/01/01 to 2005/12/31. 116 students were served as controls who were from the same class of the cases and matched by age and sex.

The association between sleep and injury among school-aged children in rural China: a case-control study.

Objective: To explore the association between sleep and accidental injury among school-aged children in a rural area of China.

Methods: Information was collected regarding parent-reported sleep patterns and problems of 182 children with a history of a medically attended injury in the previous 12 months and of 207 non-injured control children, and data were analyzed to compare differences between the two groups of children.

Results: Global sleep disturbance (Children's Sleep Habits Questionnaire [CSHQ] total score) was significantly higher in the injured group (IG) than in the non-injured group (NIG), and a greater percentage of the IG scored above the clinical cut-off score on the CSHQ.

Expression of cholera toxin B subunit and assembly as functional oligomers in silkworm.

The nontoxic B subunit of cholera toxin (CTB) can significantly increase the ability of proteins to induce immunological tolerance after oral administration, when it was conjugated to various proteins. Recombinant CTB offers great potential for treatment of autoimmune disease. Here we firstly investigated the feasibility of silkworm baculovirus expression vector system for the cost-effective production of CTB under the control of a strong polyhedrin promoter.