A novel carbonaceous adsorbent for heavy metal removal was prepared from raw coal by one-step simple sulfur impregnation using K2S. Raw coal was mixed with K2S powder and then heated at 800℃ for 30 min in nitrogen to...A novel carbonaceous adsorbent for heavy metal removal was prepared from raw coal by one-step simple sulfur impregnation using K2S. Raw coal was mixed with K2S powder and then heated at 800℃ for 30 min in nitrogen to produce K2S char. The sulfur content and form in K2S char were determined, and the ability of K2S char to adsorb Zn^2＋, Cd^2＋ and Pb^2＋ was examined. The K2S impregnation was effective at impregnating sulfur into coal, especially in the form of elemental, thiophenic and sulfatic sulfur. The sulfur content of K2S char was higher than those of raw coal and pyrolysis char. The Zn^2＋ removal in 2.4 mmol/L of Zn^2＋ solution by K2S char was higher than raw coal with the removal rate of 100%. K2S char adsorbed Pb^2＋ and Cd^2＋ in 24 mmol/L of Pb^2＋ and Cd^2＋ solution with the removal rate of 97% and 35%, respectively. The elution extents of adsorbed Pb^2＋ and Cd^2＋ were zero in distilled water and 27% in 0.1 mol/L HCl solution. These results indicated that an effective adsorbent for heavy metal ions was prepared from coal using K2S sulfur impregnation, and that the adsorbed metals were strongly retained in K2S char.展开更多
BACKGROUND During pancreaticoduodenectomy in patients with celiac axis(CA)stenosis due to compression by the median arcuate ligament(MAL),the MAL has to be divided to maintain hepatic blood flow in many cases.However,...BACKGROUND During pancreaticoduodenectomy in patients with celiac axis(CA)stenosis due to compression by the median arcuate ligament(MAL),the MAL has to be divided to maintain hepatic blood flow in many cases.However,MAL division often fails,and success can only be determined intraoperatively.To overcome this problem,we performed endovascular CA stenting preoperatively,and thereafter safely performed pancreaticoduodenectomy.We present this case as a new preoperative treatment strategy that was successful.CASE SUMMARY A 77-year-old man with a diagnosis of pancreatic head cancer presented to our department for surgery.Preoperative assessment revealed CA stenosis caused by MAL.We performed endovascular stenting in the CA preoperatively because we knew that going into the operation without a strategy could lead to ischemic complications.Double-antiplatelet therapy(DAPT)–which is needed when a stent is inserted–was then administered in parallel with neoadjuvant chemotherapy(NAC).This allowed us to administer DAPT for a sufficient period before the main pancreaticoduodenectomy procedure while obtaining therapeutic effects from NAC.Subtotal stomach-preserving pancreaticoduodenectomy was thenperformed.The operation did not require any unusual techniques and was performed safely.Postoperatively,the patient progressed well,without any ischemic complications.Histopathologically,curative resection was confirmed,and the patient had no recurrence or complications due to ischemia up to six months postoperatively.CONCLUSION Preoperative endovascular stenting,with NAC and DAPT,is effective and safe prior to pancreaticoduodenectomy in potentially resectable pancreatic cancer.展开更多
The purpose of this study is to examine the structure and the temperature-responsive anion exchange property of amino-functionalized mesoporous silica coated with temperature-responsive copolymer, poly(N-isopropylacry...The purpose of this study is to examine the structure and the temperature-responsive anion exchange property of amino-functionalized mesoporous silica coated with temperature-responsive copolymer, poly(N-isopropylacrylamide-co-acrylamide) (P(NIPAM-co-Am)). For this purpose, the composites which contained 0, 10, or 20 wt% of Am were synthesized. From the TG results, it was found that the amounts of copolymer immobilized on the mesoporous silica were 1.6 - 2.6 wt%. XRD patterns revealed that the structures of composites were hexagonal and almost the same as that of original mesoporous silica without polymer. At low temperature the methyl orange (MO) anions adsorbed and desorbed reversibly with changing pH of the solution, while at high temperature the MO anions did not. This temperature, at which the amount of adsorbed MO anions changed considerably, shifted to the higher temperature side with increasing the amount of added Am.展开更多
To accelerate the breeding process, male sterile line is used to leave out the troublesome procedures of the artificial emasculation in tomato breeding. However, the fertility of the pollen thermo-sensitivity male ste...To accelerate the breeding process, male sterile line is used to leave out the troublesome procedures of the artificial emasculation in tomato breeding. However, the fertility of the pollen thermo-sensitivity male sterile line (PTMSL) and the stigma exsertion male sterile line (SEMSL) are affected easily by the environments when used alone. The trial materials were Da107 and the control was First. This study was conducted to create a new male sterile line of tomato characterized by pollen thermo-sensitivity and long style by genic recombination through the hybridizing of the PTMSL and SEMSL. Research on the statistics of the pollen germination rate, the contamination rate in F1 and the flower organics indicated that Da107 was an ideal TS and SE male sterile line with the sterility of 95%, as well as it also could be used as fertile line at low temperature. Meanwhile, the results showed that hybrid-seed contamination risk with selfed seeds from residual fertility in Da107 was low.展开更多
Sedimentation tests of bentonite suspension were carried out by adding various concentrations of poly(N-isopropylacrylamide) (PNIPAM) with different molecular weights as flocculant below and above lower critical solut...Sedimentation tests of bentonite suspension were carried out by adding various concentrations of poly(N-isopropylacrylamide) (PNIPAM) with different molecular weights as flocculant below and above lower critical solution temperature (LCST). Also, the effect of PNIPAM on aggregation of bentonite was investigated by sedimentation rate, turbidity of supernatant. Additionally, XRD patterns and SEM photographs were measured in order to consider aggregation mechanism of PNIPAM. The sedimentation rate and turbidity for the PNIPAM with large molecular weight or PNIPAM solution of high concentration above LCST were faster and clearer than those with small molecular weight or low concentration. From XRD patterns, the peak of bentonite sediment with PNIPAM shifted to the low-angle side, suggesting that a part of PNIPAM chain entered between bentonite layers. Furthermore, it was confirmed by SEM photographs that PNIPAM covered bentonite surface after sedimentation test. It was indicated that PNIPAM adsorbs on the bentonite surface and aggregates each bentonite particle above LCST. From these results, PNIPAM works as a flocculant and the PNIPAM with large molecular weight has a good ability.展开更多
The purpose of this study was to investigate the relationship between functional ankle instability and collegiate female football players’ performance. Ankle instability was defined as functional instability based on...The purpose of this study was to investigate the relationship between functional ankle instability and collegiate female football players’ performance. Ankle instability was defined as functional instability based on the Karlsson score. All participants underwent performance tests (Yo-Yo Intermittent Recovery test level 1, 20 m and 40 m Sprint, Bounding test, Shuttle run, Figure-of-8 hop test, and Side hopping). A positive relationship was observed between functional ankle instability and performance deficits on the Figure-of-8 hop test. However, functional ankle instability is thought to have an influence on football performance. In the performance tests, the results suggest the necessity of a new evaluation method with more difficult tests incorporating football movements, subjective “pain” and “instability” indices, and mechanical instability.展开更多
A degradative solvent extraction method for upgrading low-rank coal was performed at 200-350◦C for 90 min to obtain a substance dissolved in the solvent at room temperature(Soluble).Because the resulting mixture exhib...A degradative solvent extraction method for upgrading low-rank coal was performed at 200-350◦C for 90 min to obtain a substance dissolved in the solvent at room temperature(Soluble).Because the resulting mixture exhibited a high carbon content without ash,it could be readily used as a fuel.Furthermore,deep eutectic solvents(DESs)have attracted attention for improving the Soluble yield and decreasing the oxygen content in Soluble.DES is known to cleave oxygen-containing functional groups in biomass and is considered effective for deoxidizing low-rank coal.Herein,DES was prepared by mixing choline chloride,FeCl3⋅6H2O,and Adaro subbituminous coal(AD)and then added to 1-methylnaphthalene(1-MN)in a non-polar solvent,followed by degradative solvent extraction in the range of 200-350◦C.The effects of reaction temperature and added DES amount on the product yield and the composition were evaluated.As the reaction temperature and amount of DES added increased,the Soluble yield and carbon content increased.It was also found that the thermal decomposition temperature and oxygen content decreased with the increasing DES amounts.This decrease indicates that DES promotes the deoxygenation and decomposition of AD and increases the soluble yield of the fuel source.展开更多
文摘A novel carbonaceous adsorbent for heavy metal removal was prepared from raw coal by one-step simple sulfur impregnation using K2S. Raw coal was mixed with K2S powder and then heated at 800℃ for 30 min in nitrogen to produce K2S char. The sulfur content and form in K2S char were determined, and the ability of K2S char to adsorb Zn^2＋, Cd^2＋ and Pb^2＋ was examined. The K2S impregnation was effective at impregnating sulfur into coal, especially in the form of elemental, thiophenic and sulfatic sulfur. The sulfur content of K2S char was higher than those of raw coal and pyrolysis char. The Zn^2＋ removal in 2.4 mmol/L of Zn^2＋ solution by K2S char was higher than raw coal with the removal rate of 100%. K2S char adsorbed Pb^2＋ and Cd^2＋ in 24 mmol/L of Pb^2＋ and Cd^2＋ solution with the removal rate of 97% and 35%, respectively. The elution extents of adsorbed Pb^2＋ and Cd^2＋ were zero in distilled water and 27% in 0.1 mol/L HCl solution. These results indicated that an effective adsorbent for heavy metal ions was prepared from coal using K2S sulfur impregnation, and that the adsorbed metals were strongly retained in K2S char.
文摘BACKGROUND During pancreaticoduodenectomy in patients with celiac axis(CA)stenosis due to compression by the median arcuate ligament(MAL),the MAL has to be divided to maintain hepatic blood flow in many cases.However,MAL division often fails,and success can only be determined intraoperatively.To overcome this problem,we performed endovascular CA stenting preoperatively,and thereafter safely performed pancreaticoduodenectomy.We present this case as a new preoperative treatment strategy that was successful.CASE SUMMARY A 77-year-old man with a diagnosis of pancreatic head cancer presented to our department for surgery.Preoperative assessment revealed CA stenosis caused by MAL.We performed endovascular stenting in the CA preoperatively because we knew that going into the operation without a strategy could lead to ischemic complications.Double-antiplatelet therapy(DAPT)–which is needed when a stent is inserted–was then administered in parallel with neoadjuvant chemotherapy(NAC).This allowed us to administer DAPT for a sufficient period before the main pancreaticoduodenectomy procedure while obtaining therapeutic effects from NAC.Subtotal stomach-preserving pancreaticoduodenectomy was thenperformed.The operation did not require any unusual techniques and was performed safely.Postoperatively,the patient progressed well,without any ischemic complications.Histopathologically,curative resection was confirmed,and the patient had no recurrence or complications due to ischemia up to six months postoperatively.CONCLUSION Preoperative endovascular stenting,with NAC and DAPT,is effective and safe prior to pancreaticoduodenectomy in potentially resectable pancreatic cancer.
文摘The purpose of this study is to examine the structure and the temperature-responsive anion exchange property of amino-functionalized mesoporous silica coated with temperature-responsive copolymer, poly(N-isopropylacrylamide-co-acrylamide) (P(NIPAM-co-Am)). For this purpose, the composites which contained 0, 10, or 20 wt% of Am were synthesized. From the TG results, it was found that the amounts of copolymer immobilized on the mesoporous silica were 1.6 - 2.6 wt%. XRD patterns revealed that the structures of composites were hexagonal and almost the same as that of original mesoporous silica without polymer. At low temperature the methyl orange (MO) anions adsorbed and desorbed reversibly with changing pH of the solution, while at high temperature the MO anions did not. This temperature, at which the amount of adsorbed MO anions changed considerably, shifted to the higher temperature side with increasing the amount of added Am.
文摘To accelerate the breeding process, male sterile line is used to leave out the troublesome procedures of the artificial emasculation in tomato breeding. However, the fertility of the pollen thermo-sensitivity male sterile line (PTMSL) and the stigma exsertion male sterile line (SEMSL) are affected easily by the environments when used alone. The trial materials were Da107 and the control was First. This study was conducted to create a new male sterile line of tomato characterized by pollen thermo-sensitivity and long style by genic recombination through the hybridizing of the PTMSL and SEMSL. Research on the statistics of the pollen germination rate, the contamination rate in F1 and the flower organics indicated that Da107 was an ideal TS and SE male sterile line with the sterility of 95%, as well as it also could be used as fertile line at low temperature. Meanwhile, the results showed that hybrid-seed contamination risk with selfed seeds from residual fertility in Da107 was low.
文摘Sedimentation tests of bentonite suspension were carried out by adding various concentrations of poly(N-isopropylacrylamide) (PNIPAM) with different molecular weights as flocculant below and above lower critical solution temperature (LCST). Also, the effect of PNIPAM on aggregation of bentonite was investigated by sedimentation rate, turbidity of supernatant. Additionally, XRD patterns and SEM photographs were measured in order to consider aggregation mechanism of PNIPAM. The sedimentation rate and turbidity for the PNIPAM with large molecular weight or PNIPAM solution of high concentration above LCST were faster and clearer than those with small molecular weight or low concentration. From XRD patterns, the peak of bentonite sediment with PNIPAM shifted to the low-angle side, suggesting that a part of PNIPAM chain entered between bentonite layers. Furthermore, it was confirmed by SEM photographs that PNIPAM covered bentonite surface after sedimentation test. It was indicated that PNIPAM adsorbs on the bentonite surface and aggregates each bentonite particle above LCST. From these results, PNIPAM works as a flocculant and the PNIPAM with large molecular weight has a good ability.
文摘The purpose of this study was to investigate the relationship between functional ankle instability and collegiate female football players’ performance. Ankle instability was defined as functional instability based on the Karlsson score. All participants underwent performance tests (Yo-Yo Intermittent Recovery test level 1, 20 m and 40 m Sprint, Bounding test, Shuttle run, Figure-of-8 hop test, and Side hopping). A positive relationship was observed between functional ankle instability and performance deficits on the Figure-of-8 hop test. However, functional ankle instability is thought to have an influence on football performance. In the performance tests, the results suggest the necessity of a new evaluation method with more difficult tests incorporating football movements, subjective “pain” and “instability” indices, and mechanical instability.
基金CHN analysis(LECO,CHN628)for measuring mass fractions of Soluble and Residue was supported by Yukio Enda,Junko Kutsuna in Akita Industrial Technology Center.Appendix A.Supplementary data。
文摘A degradative solvent extraction method for upgrading low-rank coal was performed at 200-350◦C for 90 min to obtain a substance dissolved in the solvent at room temperature(Soluble).Because the resulting mixture exhibited a high carbon content without ash,it could be readily used as a fuel.Furthermore,deep eutectic solvents(DESs)have attracted attention for improving the Soluble yield and decreasing the oxygen content in Soluble.DES is known to cleave oxygen-containing functional groups in biomass and is considered effective for deoxidizing low-rank coal.Herein,DES was prepared by mixing choline chloride,FeCl3⋅6H2O,and Adaro subbituminous coal(AD)and then added to 1-methylnaphthalene(1-MN)in a non-polar solvent,followed by degradative solvent extraction in the range of 200-350◦C.The effects of reaction temperature and added DES amount on the product yield and the composition were evaluated.As the reaction temperature and amount of DES added increased,the Soluble yield and carbon content increased.It was also found that the thermal decomposition temperature and oxygen content decreased with the increasing DES amounts.This decrease indicates that DES promotes the deoxygenation and decomposition of AD and increases the soluble yield of the fuel source.
