G-C3N4 was supported on the surface of foamed ceramic,and the g-C3N4@foamed ceramic was packed in the photocatalytic reactor in a layered manner.Effects of urea and H2O2 concentration on NO conversion were investigate...G-C3N4 was supported on the surface of foamed ceramic,and the g-C3N4@foamed ceramic was packed in the photocatalytic reactor in a layered manner.Effects of urea and H2O2 concentration on NO conversion were investigated.Pulse experiments were carried out to investigate the change of NO conversion with time under different concentrations of H2O2.The contribution of each route that NO converted and the selectivities of products were calculated.Results showed that the photo-reduction of NO accounted for 2%,and the photo-oxidation of NO accounted for 14%,and the rest was absorbed by the humidifier.Products include ammonia(NH+4-N),nitrogen(N2),nitrite(NO-2-N)and nitrate(NO-3-N),of which N2 accounted for 9%.展开更多
In recent decades,the ozone layer has suffered considerable damage,increasing the entry of ultraviolet(UV)light into the atmosphere and reaching the earth’s surface,negatively affecting life.Accordingly,researchers a...In recent decades,the ozone layer has suffered considerable damage,increasing the entry of ultraviolet(UV)light into the atmosphere and reaching the earth’s surface,negatively affecting life.Accordingly,researchers aimed to solve this problem by synthesizing advanced UV-shielding materials.On the other hand,developing an easy and green strategy to prepare functional materials with outstanding properties based on naturally abundant and environmentally friendly raw materials is highly desirable for sustainable development.Because biomass-derived materials are sustainable and biodegradable,they present a promising substitute for petroleum-based polymers.The three main structural constituents of the plant biomass-based materials that are naturally available are cellulose,hemicellulose,and lignin.This review details current developments using wood-based products such as cellulose,hemicellulose,and lignin in UV-shielding applications.It will start with assembling the structure and chemistry of cellulose,hemicellulose,and lignin,followed by their contributions to preparing UV-shielding materials.Finally,it will briefly discuss the different processing methods for the design of UV-shielding materials.The wood by-products offer additional opportunities to use the whole tree harvest.展开更多
BACKGROUND Vitamin D deficiency is a common problem in exclusively breastfed infants,with supplementation recommended by various international medical organizations.However,in Thailand,no advice for routine vitamin D ...BACKGROUND Vitamin D deficiency is a common problem in exclusively breastfed infants,with supplementation recommended by various international medical organizations.However,in Thailand,no advice for routine vitamin D supplementation is available.Thus,this study investigated the prevalence of vitamin D deficiency and its associated factors in exclusively breastfed infants in Bangkok,Thailand.AIM To investigated the prevalence of vitamin D deficiency and its associated factors in exclusively breastfed infants in Bangkok,Thailand.METHODS This descriptive observational cross-sectional study assessed 1094-month-old infants at Charoenkrung Pracharak Hospital from May 2020 to April 2021.The 25-OH vitamin D level of the infants was measured using an electrochemiluminescence binding assay.Vitamin D deficiency was defined as 25-OH level<20 ng/mL,with vitamin D insufficiency 20-30 ng/mL.The sun index and maternal vitamin D supplementation data were collected and analyzed using the independent t-test,univariate logistic regression,and multivariate logistic regression to identify the associated factors.RESULTS The prevalences of vitamin D deficiency and vitamin D insufficiency were 35.78%and 33.03%,respectively with mean serum 25-OH vitamin D levels in these two groups 14.37±3.36 and 24.44±3.29 ng/mL.Multivariate logistic regression showed that the main factors associated with vitamin D status were maternal vitamin D supplementation and birth weight,with crude odds ratios 0.26(0.08–0.82)and 0.08(0.01–0.45),respectively.The sun index showed no correlation with the 25-OH vitamin D level in exclusively breastfed infants(r=−0.002,P=0.984).CONCLUSION Two-thirds of healthy exclusively breastfed infants had hypovitaminosis D.Vitamin D supplementation prevented this condition and was recommended for both lactating women and their babies.展开更多
基金supported by Shandong Electric Power Construction Third Engineering Co.,Ltd.(20173702021476)the“HUIMN Science and Technology”project of Qingdao(17-3-3-71-nsh)+1 种基金the High-concentration Organic Wastewater Adsorbent Production Process(20170903)the National Natural Science Foundation of China(51602297,U1510109)。
文摘G-C3N4 was supported on the surface of foamed ceramic,and the g-C3N4@foamed ceramic was packed in the photocatalytic reactor in a layered manner.Effects of urea and H2O2 concentration on NO conversion were investigated.Pulse experiments were carried out to investigate the change of NO conversion with time under different concentrations of H2O2.The contribution of each route that NO converted and the selectivities of products were calculated.Results showed that the photo-reduction of NO accounted for 2%,and the photo-oxidation of NO accounted for 14%,and the rest was absorbed by the humidifier.Products include ammonia(NH+4-N),nitrogen(N2),nitrite(NO-2-N)and nitrate(NO-3-N),of which N2 accounted for 9%.
文摘In recent decades,the ozone layer has suffered considerable damage,increasing the entry of ultraviolet(UV)light into the atmosphere and reaching the earth’s surface,negatively affecting life.Accordingly,researchers aimed to solve this problem by synthesizing advanced UV-shielding materials.On the other hand,developing an easy and green strategy to prepare functional materials with outstanding properties based on naturally abundant and environmentally friendly raw materials is highly desirable for sustainable development.Because biomass-derived materials are sustainable and biodegradable,they present a promising substitute for petroleum-based polymers.The three main structural constituents of the plant biomass-based materials that are naturally available are cellulose,hemicellulose,and lignin.This review details current developments using wood-based products such as cellulose,hemicellulose,and lignin in UV-shielding applications.It will start with assembling the structure and chemistry of cellulose,hemicellulose,and lignin,followed by their contributions to preparing UV-shielding materials.Finally,it will briefly discuss the different processing methods for the design of UV-shielding materials.The wood by-products offer additional opportunities to use the whole tree harvest.
基金Supported by Charoenkrung Pracharak Hospital,No.S008h/63.
文摘BACKGROUND Vitamin D deficiency is a common problem in exclusively breastfed infants,with supplementation recommended by various international medical organizations.However,in Thailand,no advice for routine vitamin D supplementation is available.Thus,this study investigated the prevalence of vitamin D deficiency and its associated factors in exclusively breastfed infants in Bangkok,Thailand.AIM To investigated the prevalence of vitamin D deficiency and its associated factors in exclusively breastfed infants in Bangkok,Thailand.METHODS This descriptive observational cross-sectional study assessed 1094-month-old infants at Charoenkrung Pracharak Hospital from May 2020 to April 2021.The 25-OH vitamin D level of the infants was measured using an electrochemiluminescence binding assay.Vitamin D deficiency was defined as 25-OH level<20 ng/mL,with vitamin D insufficiency 20-30 ng/mL.The sun index and maternal vitamin D supplementation data were collected and analyzed using the independent t-test,univariate logistic regression,and multivariate logistic regression to identify the associated factors.RESULTS The prevalences of vitamin D deficiency and vitamin D insufficiency were 35.78%and 33.03%,respectively with mean serum 25-OH vitamin D levels in these two groups 14.37±3.36 and 24.44±3.29 ng/mL.Multivariate logistic regression showed that the main factors associated with vitamin D status were maternal vitamin D supplementation and birth weight,with crude odds ratios 0.26(0.08–0.82)and 0.08(0.01–0.45),respectively.The sun index showed no correlation with the 25-OH vitamin D level in exclusively breastfed infants(r=−0.002,P=0.984).CONCLUSION Two-thirds of healthy exclusively breastfed infants had hypovitaminosis D.Vitamin D supplementation prevented this condition and was recommended for both lactating women and their babies.
