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View article: Association between deletions in the preS1/2 region of the hepatitis B virus genome and persistently abnormal ALT levels in patients with chronic hepatitis B treated with nucleos(t)ide analogs
Association between deletions in the preS1/2 region of the hepatitis B virus genome and persistently abnormal ALT levels in patients with chronic hepatitis B treated with nucleos(t)ide analogs Open
Patients with chronic hepatitis B (CHB) are at risk of developing hepatocellular carcinoma (HCC) during treatment with nucleos(t)ide analogs (NAs). Several factors, including abnormal ALT levels during NA treatment, are associated with HCC…
View article: Identification of low-molecular compounds that inhibit envelope formation of hepatitis B virus
Identification of low-molecular compounds that inhibit envelope formation of hepatitis B virus Open
Agents with novel mechanisms are clinically needed for the functional cure of chronic hepatitis B virus (HBV) infection. This study aimed to identify compounds that inhibit an interaction between large hepatitis B surface (LHBs) and hepati…
View article: Comparison of hepatitis B virus genotype B and C patients in Japan in terms of family history and maternal age at birth
Comparison of hepatitis B virus genotype B and C patients in Japan in terms of family history and maternal age at birth Open
Aim Hepatitis B virus of genotypes B (HBV/B) and C (HBV/C) prevails in Japan and patients with HBV/B have been known to be older than those with HBV/C, but the reason has remained unknown. We aimed to clarify the reason by focusing on the …
View article: Type 2 Diabetes Mellitus Is a Risk Factor for Skeletal Muscle Loss in the Course of Dietary Treatment for Patients with Metabolic Dysfunction-associated Steatotic Liver Disease
Type 2 Diabetes Mellitus Is a Risk Factor for Skeletal Muscle Loss in the Course of Dietary Treatment for Patients with Metabolic Dysfunction-associated Steatotic Liver Disease Open
Objective This study assessed the impact of dietary therapy and reduced body weight on the loss of skeletal muscle in patients with metabolic dysfunction-associated steatotic liver disease (MASLD). Methods This was a single-center retrospe…
View article: Galvanic Corrosion among Ti-6Al-4V ELI Alloy, Co-Cr-Mo Alloy, 316L-Type Stainless Steel, and Zr-1Mo Alloy for Orthopedic Implants
Galvanic Corrosion among Ti-6Al-4V ELI Alloy, Co-Cr-Mo Alloy, 316L-Type Stainless Steel, and Zr-1Mo Alloy for Orthopedic Implants Open
In orthopedics, occasionally, different types of metals are used in applications in which they are in contact with each other. However, few studies have electrochemically investigated the galvanic corrosion of orthopedic implants formed of…
View article: The Constituent Phases and Micromechanical Properties of Steel Corrosion Layers Generated by Hyperbaric-Oxygen Accelerated Corrosion Test
The Constituent Phases and Micromechanical Properties of Steel Corrosion Layers Generated by Hyperbaric-Oxygen Accelerated Corrosion Test Open
Hyperbaric oxygen-accelerated corrosion testing (HOACT) is a newly developed method to study in the labor the corrosion behavior of steel bars in concrete. This work aimed to intensively investigate the mechanical properties and microstruc…
View article: Rapid Formation of Calcium Hydroxy Zincate on Zinc by Hyperbaric-Oxygen
Rapid Formation of Calcium Hydroxy Zincate on Zinc by Hyperbaric-Oxygen Open
Increasing dissolved oxygen (DO) concentration of saturated Ca(OH)2 solution accelerated formation of corrosion resistant film, calcium hydroxy zincate (Ca(Zn(OH)3)2·2H2O, CHZ) on zinc and increased the density of the CHZ layer. The increa…
View article: Formation of Composite Coatings of Layered Double Hydroxide Particles and Hydroxide Gel by Electrophoretic Deposition on Mg Alloy and Corrosion Resistance
Formation of Composite Coatings of Layered Double Hydroxide Particles and Hydroxide Gel by Electrophoretic Deposition on Mg Alloy and Corrosion Resistance Open
To improve the corrosion resistance of Mg alloys, composite coatings of layered double hydroxide intercalated with carbonate (LDH-CO3, hydrotalcite) particles and magnesium and aluminum hydroxide gel were formed on AZ31 Mg alloy by electro…
View article: Electrochemical Impedance Analysis of Effect of Surrounding Oxygen Concentration on Corrosion Resistance of Type 304 Stainless Steel
Electrochemical Impedance Analysis of Effect of Surrounding Oxygen Concentration on Corrosion Resistance of Type 304 Stainless Steel Open
塩化物イオンを含む水膜下でtype304ステンレス鋼の不働態皮膜の成長挙動および局部腐食の発生・進行に及ぼす反応系での酸素濃度の影響を電気化学インピーダンス法により検討した．酸素濃度が増大するほど，不働態皮膜は厚く皮膜抵抗は小さくなった．不働態皮膜破壊後の局部腐食進行時には，酸素濃度の増大に伴い酸素還元反応が促進されるため，母材の溶解が再不働態化よりも優位となり，局部腐食の進行は促進された．
View article: Effects of CO<sub>2</sub> Partial Pressure and Drying Conditions on Carbonation of Mortars
Effects of CO<sub>2</sub> Partial Pressure and Drying Conditions on Carbonation of Mortars Open
促進中性化試験実施時のCO2分圧とモルタル供試体の乾燥状態が中性化の進行に及ぼす影響を検討した．その結果，初期養生後の供試体の乾燥による質量変化量が大きく，かつ促進中性化試験中のCO2分圧が高いほど，中性化が進行した．加えて，促進中性化試験終了後，14日間の高酸素腐食促進試験を実施し，中性化深さがかぶりと同程度の場合，モルタル中の鋼材が腐食していることを確認した．
View article: Galvanic Corrosion among Ti–6Al–4V ELI Alloy, Co–Cr–Mo Alloy, 316L-Type Stainless Steel, and Zr–1Mo Alloy for Orthopedic Implants
Galvanic Corrosion among Ti–6Al–4V ELI Alloy, Co–Cr–Mo Alloy, 316L-Type Stainless Steel, and Zr–1Mo Alloy for Orthopedic Implants Open
In orthopedics, occasionally, different types of metals are used in applications in which they are in contact with each other. However, few studies have electrochemically investigated the galvanic corrosion of orthopedic implants formed of…
View article: Rapid Formation of Calcium Hydroxy Zincate on Zinc by Hyperbaric-oxygen
Rapid Formation of Calcium Hydroxy Zincate on Zinc by Hyperbaric-oxygen Open
飽和Ca（OH）2溶液への供給酸素（分）圧（O2圧）の増加により，亜鉛の耐食性を向上させるカルシウムハイドロキシジンケート（Ca（Zn（OH）3）2・2H2O，CHZ）の形成が加速され，ち密なCHZ層が形成された．供給O2圧の増加に伴ってCHZ形成の律速過程である酸素還元反応が促進された．飽和Ca（OH）2溶液への供給O2圧が高いほど，より短期間で亜鉛の耐食性が向上した．これは絶縁性を示すCHZの加速形成により亜鉛の露出面積がより早く減少したためである．
View article: Crystallographic texture- and grain boundary density-independent improvement of corrosion resistance in austenitic 316L stainless steel fabricated via laser powder bed fusion
Crystallographic texture- and grain boundary density-independent improvement of corrosion resistance in austenitic 316L stainless steel fabricated via laser powder bed fusion Open
Improvement of corrosion resistance of austenitic 316L stainless steel via laser powder bed fusion (LPBF) is currently a prominent research topic; however, the effects of crystallographic texture and the related grain boundary density on t…
View article: Diagnostic Technique for Corrosion of Reinforcing Steel Inside Concrete
Diagnostic Technique for Corrosion of Reinforcing Steel Inside Concrete Open
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View article: Microbubble flows in superwettable fluidic channels
Microbubble flows in superwettable fluidic channels Open
Microbubble flows inside a superwettable channel revealed underwater superwetting phenomena under flow conditions, contributing to the understanding of real-world environmental wetting systems.
View article: Hyperbaric-Oxygen Accelerated Corrosion Test for Iron in Cement Paste and Mortar
Hyperbaric-Oxygen Accelerated Corrosion Test for Iron in Cement Paste and Mortar Open
A novel accelerated corrosion test method which enhances oxygen supply has been proposed for reinforcing steel in concrete in this study. Oxygen reduction current density (ORCD) was measured by means of potentiodynamic polarization test fo…
View article: Effects of Oxygen Pressure and Chloride Ion Concentration on Corrosion of Iron in Mortar Exposed to Pressurized Humid Oxygen Gas
Effects of Oxygen Pressure and Chloride Ion Concentration on Corrosion of Iron in Mortar Exposed to Pressurized Humid Oxygen Gas Open
The effects of oxygen pressure on the corrosion of iron embedded in mortar with various Cl− contents were examined by using a novel hyperbaric-oxygen accelerated corrosion test (HOACT). Exposure and electrochemical tests of a pure iron sam…
View article: CORROSION RESISTANCE OF SD345 STEEL IN A SOLUTION THAT SIMULATES CONCRETE WITH Cl<sup>-</sup>
CORROSION RESISTANCE OF SD345 STEEL IN A SOLUTION THAT SIMULATES CONCRETE WITH Cl<sup>-</sup> Open
塩化物イオンを含んだコンクリート模擬溶液中におけるSD345鋼の耐食性を検討するため，鋼材表面の不働態皮膜の電気化学特性をアノード分極測定およびインピーダンス測定により検討した．その結果，コンクリート模擬溶液への浸漬時間が長いほど不働態皮膜が安定になる一方，一定量以上の塩化物イオンが鋼材表面に到達する際には皮膜は破壊され腐食が生じることが明らかになった．さらに，乾湿繰返し試験中にインピーダンス測定を行うことで，乾燥および湿潤過程におけるコンクリート内部鉄筋の耐食性を検討した…