http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Barsoum, Michel W. (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Dental needle foreign body in the neck: a case report
Mohammed, Hassen,Shallik, Nabil,Barsoum, Mina,Abdulla, Majid Al,Dogan, Zynel,Ahmed, Hassan Haidar,Moustafa, Abbas The Korean Dental Society of Anesthsiology 2020 Journal of Dental Anesthesia and Pain Medicine Vol.20 No.2
Foreign body (FB) ingestion is commonly seen in the ear nose and throat (ENT) field, with different presentations and sequelae. FBs can arrest in the upper aerodigestive tract or continue further down into either the airway tract to the bronchus or the digestive tract to the intestines. The pathway of an FB depends on the size and shape of the FB and how sharp its edges are. Since the 20th century, the use of disposable stainless-steel needles in the oral cavity has proven to be an effective and safe method for performing various intraoral procedures like dental infiltration or a root canal wash. Complications from their use are rare. Generally, dental needle breakages are caused by patients biting the needle, incorrect injection techniques, or inadequate preventative measures. The sudden movement of a patient during a procedure is one of the most common causes of breakage. Occasionally, needles are swallowed during dental procedures such as a root canal. Here, we report a case of a patient that swallowed a broken needle during a dental procedure. A few days later, the patient presented with neck pain, swelling, and a FB sensation. When the patient presented, she claimed that her symptoms had onset after consuming a meal containing duck meat. Initially, the patient was diagnosed as having ingested a duck bone. However, intraoperatively, the FB was discovered to be an injection needle that had migrated from the throat to the neck.
-
Yoon, Yeoheung,Le, Thi Anh,Tiwari, Anand P.,Kim, Ikjoon,Barsoum, Michel W.,Lee, Hyoyoung The Royal Society of Chemistry 2018 Nanoscale Vol.10 No.47
<P>MXenes - two dimensional, 2D, early transition metal, M, carbides and nitrides, X - are the latest addition to the 2D materials’ world. Herein, we report on a facile low temperature solution chemical synthesis method to reduce Ti3C2Tx multilayered, ML, MXenes. Using X-ray photoelectron spectroscopy, electron spin resonance, magnetization measurements and other techniques, we concluded that immersing Ti3C2Tx MLs in the reducing agent Li-ethylenediamine (Li-EDA) - held at temperatures varying from room to 120 °C - reduces the 2D layers creating Ti<SUP>3+</SUP> ions and oxygen vacancies. Above a temperature (<I>T</I>) of ≈10 K, the magnetic susceptibilities, <I>χ</I>, are temperature independent, implying that the resulting powders are Pauli paramagnetic. The loss of the magnetic signal upon intercalation of Li<SUP>+</SUP> or EDA, together with a Curie-like increase in <I>χ</I> at <I>T</I> < 10 K, is consistent with that of a disordered metal that is close to a metallic to insulator transition and proves that the magnetism is associated with the 2D flakes. This result is the first evidence of any magnetism of any MXene.</P>
-
High mass loading, binder-free MXene anodes for high areal capacity Li-ion batteries
Kim, Seon Joon,Naguib, Michael,Zhao, Mengqiang,Zhang, Chuanfang,Jung, Hee-Tae,Barsoum, Michel W.,Gogotsi, Yury Elsevier 2015 ELECTROCHIMICA ACTA Vol.163 No.-
<P><B>Abstract</B></P> <P>Though anodes with high Li gravimetric capacities, beyond commercial graphite, have been intensively studied, gravimetric capacity does not precisely reflect the performance of a packed cell. Li anodes with high mass loadings, which can achieve high areal capacities, are required for many commercial applications. Herein, anodes with high mass loadings were fabricated using two-dimensional transition metal carbides (MXenes). Powders of the latter were cold pressed, without binders, at a pressure of 1GPa, to create ∼300μm thick, free-standing discs. When Ti<SUB>3</SUB>C<SUB>2</SUB> was used as the anode for lithium, the initial reversible areal capacity was ∼15mAh/cm<SUP>2</SUP>, which decreased to 5.9mAh/cm<SUP>2</SUP> after 50 cycles, but the decrease after the first ∼20 cycles was very gradual. The latter is one of the highest values ever reported to date. When Nb<SUB>2</SUB>C was used as the anode instead, the initial reversible capacity was ∼16mAh/cm<SUP>2</SUP>; this value decreased to 6.7mAh/cm<SUP>2</SUP> after 50 cycles, which is about a 14% increase compared to Ti<SUB>3</SUB>C<SUB>2</SUB>. As the research on MXenes for lithium ion batteries has just begun, there is certainly room for further improving their electrochemical performance.</P>
-
Byeon, Ayeong,Zhao, Meng-Qiang,Ren, Chang E.,Halim, Joseph,Kota, Sankalp,Urbankowski, Patrick,Anasori, Babak,Barsoum, Michel W.,Gogotsi, Yury American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.5
<P>As an alternative to pure lithium-ion, Lit, systems, a hybrid magnesium, Mg2+, and Li+ battery can potentially combine the high capacity, high voltage, and fast Li+ intercalation of Li-ion battery cathodes and the high capacity, low cost, and dendrite-free Mg metal anodes. Herein, we report on the use of two-dimensional titanium carbide, Ti3C2Tx (MXene), as a cathode in hybrid Mg2+/Li+ batteries, coupled with a Mg metal anode. Free-standing and flexible Ti3C2Tx/carbon nanotube composite 'paper' delivered-,100 mAh at 0.1 C and similar to 50 mAh g(-1) at 10 C. At 1 C the capacity was maintained for >500 cycles at 80 mAh g(-1). The Mo2CTx MXene also demonstrated good performance as a cathode material in this hybrid battery. Considering the variety of available MXenes, this work opens the door for exploring a new large family of 2D materials with high electrical conductivity and large intercalation capacity as cathodes for hybrid Mg2+/Li+ batteries.</P>
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
