Magnetic contaminations of small iron meteorites, Odessa and Gibeon

Small samples of Odessa iron meteorites and Gibeon iron meteorites were studied to assess any magnetic contaminations acquired after the meteorites reached the surface of the earth. Odessa showed a stable component of natural remanent magnetization (NRM) present during AF demagnetization up to 50mT. The NRM intensity decreased from one side to the other side with the exception of an interior sample. These variations in NRM might be acquired by artificial magnetic contamination, which is supported by the REM (the ratio of NRM to saturation isothermal remanent magnetization (SIRM)) value proposed by WASILEWSKI and DICKINSON (1998). The Gibeon\u27s subsample directions with stronger NRM intensities made one cluster and those weaker intensities clustered at a different site. According to the REM values, the more intense NRM\u27s might be the result of a magnetic contamination overprint. From these experimental subsamples analyses, from small iron meteorites, we find that the possibility of magnetic contamination must be considered during NRM analyses of meteorite magnetism

Towards Conceptual Indexing of the Blogosphere through Wikipedia Topic Hierarchy

PACLIC 23 / City University of Hong Kong / 3-5 December 200

Breathing Oscillations in Bose - Fermi Mixing Gases with Yb atoms in the Largely Prolate Deformed Traps

We study the breathing oscillations in bose-fermi mixtures with Yb isotopes in the largely prolate deformed trap, which are realized by Kyoto group. We choose the three combinations of the Yb isotopes, Yb170-Yb171, Yb170-Yb173 and Yb174-Yb173, whose boson-fermion interactions are weakly repulsive, strongly attractive and strongly repulsive. The collective oscillations in the deformed trap are calculated in the dynamical time-development approach, which is formulated with the time-dependent Gross-Pitaevskii and the Vlasov equations. We analyze the results in the time-development approach with the intrinsic oscillation modes of the deformed system, which are obtained using the scaling method, and show that the damping and forced-oscillation effects of the intrinsic modes give time-variation of oscillations, especially, in the fermion transverse mode.Comment: 27 pages, 12 figure

Transabdominal Approach for Spontaneous Oesophageal Perforation: A Review of Four Cases

Spontaneous oesophageal perforation is an uncommon and life-threatening disease. Although several methods of treatment have been proposed, surgical treatment is considered the standard procedure. Primary repair using the transthoracic approach is the most common. However, few studies have evaluated the characteristics of the transabdominal approach. This study aimed to investigate the clinical outcomes of spontaneous oesophageal perforation that was surgically treated using the transabdominal approach. We retrospectively reviewed all patients with spontaneous oesophageal perforation who were admitted to the surgical department of our institution between November 2010 and April 2017, and identified a total of four patients. Data including demographic factors (age and sex), location of perforation, time to operation, operative method, complications, length of hospital stay, and postoperative recovery were reviewed. In all four cases, we treated the defect using the transabdominal approach, which provides a good surgical field of view. The aims of operative intervention, namely primary repair and access for enteral feeding, can be achieved using this approach. The most commonly observed complication was pyothorax, and we suggest the addition of intrapleural drainage for its prevention. Dysgraphia was observed in two patients, which improved with conservative treatment. The overall mortality rate was 0%. Our results demonstrate that primary repair using the transabdominal approach is safe and effective for the management of spontaneous oesophageal perforation. Addition of intrapleural drainage can improve the outcome associated with this approach

Possible Relationship Between MYBL1 Alterations and Specific Primary Sites in Adenoid Cystic Carcinoma: A Clinicopathological and Molecular Study of 36 Cases

[Background] Adenoid cystic carcinoma (ACC) is a relatively rare malignant neoplasm that occurs in salivary glands and various other organs. Recent studies have revealed that a significant proportion of ACCs harbor gene alterations involving MYB or MYBL1 (mostly fusions with NFIB) in a mutually-exclusive manner. However, its clinical significance remains to be well-established. [Methods] We investigated clinicopathological and molecular features of 36 ACCs with special emphasis on the significance of MYBL1 alterations. Reverse-transcription polymerase-chain reaction (RT-PCR) and fluorescence in-situ hybridization (FISH) were performed to detect MYB/MYBL1-NFIB fusions and MYBL1 alterations, respectively. Immunohistochemistry was performed to evaluate MYB expression in the tumors. The results were correlated with clinicopathological profiles of the patients. [Results] RT-PCR revealed MYB-NFIB and MYBL1-NFIB fusions in 10 (27.8%) and 7 (19.4%) ACCs, respectively, in a mutually-exclusive manner. FISH for MYBL1 rearrangements was successfully performed in 11 cases, and the results were concordant with those of RT-PCR. Immunohistochemically, strong MYB expression was observed in 23 (63.9%) tumors, none of which showed MYBL1 alterations. Clinicopathologically, a trend of a better disease-specific survival was noted in patients with MYBL1 alterations than in those with MYB-NFIB fusions and/or strong MYB expression; however, the difference was not significant. Interestingly, we found tumors with MYBL1 alterations significantly frequently occurred in the mandibular regions (P = 0.012). Moreover, literature review revealed a similar tendency in a previous study. [Conclusion] Our results suggest that there are some biological or etiological differences between ACCs with MYB and MYBL1 alterations. Moreover, the frequent occurrence of MYBL1-associated ACC in the mandibular regions suggests that MYB immunohistochemistry is less useful in diagnosing ACCs arising in these regions. Further studies are warranted to verify our findings

Effective Appendix Stump Closure Using the Doubleshanked Titanium Ligation Clip (DS Clip): A Case Report

Background: During laparoscopic appendectomy, several methods and devices can be used to close the appendicular stump, such as endoloops, linear staplers, clips, and open purse-string sutures. The Double-shanked Titanium Ligation Clip® (DS clip; B. Braun Aesculap, Tuttlinger, Germany), a new device that can be used to close the appendicular stump, was approved for use in Japan in March 2015. We report a case of effective appendix stump closure using DS clips. Case presentation: An 81-year-old man was admitted to our hospital with complaints of severe pain in the right lower quadrant of the abdomen. Abdominal contrast-enhanced computed tomography showed a thickened appendix (1.7 cm in diameter) with fecal stones, while acute inflammatory signs were visible around the appendix. He was diagnosed with acute appendicitis for which laparoscopic appendectomy was performed with a curative intent. It was difficult to mobilize the cecum because of inflammation, so we attempted to use DS clips instead of linear staplers. A histological examination revealed gangrenous appendicitis. The patient’s postoperative course was uneventful and he was discharged 10 days postoperatively. We also used DS clips to close the appendicular stump in 12 other cases. We observed no intra- or postoperative complications and no cases of mortality. Conclusion: The management of an appendicular stump using DS clips during laparoscopic appendectomy was simple, safe, and cost-effective. DS clips may be an alternative method to linear staplers

Examination of Selective Low-pressure Fine Needle Aspiration Cytology Under Ultrasound Guidance

Cytology by fine-needle cytology is indispensable for diagnosing head and neck tumor, especially for thyroid nodule. There are two methods of fine needle cytology; one of fine-needle aspiration cytology (FNAC and another of fine-needle non-aspiration cytology (FNNAC). These previous procedures has each disadvantage such as the mixing of blood or low yield of cells. We proposed a new technique: selective low-pressure fine needle aspiration cytology (SLOP-FNAC) to overcome the backwards of previous procedures. We used the scoring system by Mair et al. to evaluate smear quality of specimens obtained with FNNAC and SLOP-FNAC. SLOP-FNAC smears exhibited higher scores in amount of cellular material, degree of cellular degeneration and cell yield, and retention of appropriate architecture compared to FNNAC smears. The SLOP-FNAC smears scored significantly higher for amount of cellular material and retention of appropriate architecture evaluated (P = 0.0261 and P = 0.0024, Student’s t-test). SLOP-FNAC may be a useful cell sampling technique that reduces blood contamination while securing a high cell yield with maintaining tissue structure

Feasibility of classical secondary hormonal therapies prior to docetaxel therapy in Japanese patients with castration-resistant prostate cancer: Multicenter retrospective study

BackgroundWe retrospectively analyzed castration-resistant prostate cancer (CRPC) patients treated with secondary hormonal therapies (SHTs) prior to docetaxel therapy.MethodsThe cases of 73 CRPC patients who underwent docetaxel therapy in 2005–2011 at four hospitals in Ibaraki, Japan were analyzed. We determined the cause-specific survival (CSS) from the start of docetaxel therapy and the time point of CRPC diagnosis, and we compared the CSS achieved with/without prior classical SHTs, which were defined as low-dose steroid and estramustine phosphate.ResultsOf the 73 enrolled patients, 26 underwent docetaxel therapy (DOC group), and 47 underwent SHTs (SHTs-DOC group) as the initial treatment for CRPC. In the docetaxel therapy, the rate of prostate-specific antigen responses were higher in the DOC group compared with the SHTs-DOC group (76.9% vs. 44.7%, P = 0.0066). The median CSS from the docetaxel therapy initiation was not significant but longer in the DOC group than in the SHTs-DOC group (23.4 months vs. 16.6 months, P = 0.0969). However, the median CSS from the time of CRPC diagnosis did not significantly differ between the DOC and SHTs-DOC groups (23.4 months vs. 24.7 months, P = 0.9233). In a univariate analysis, pain and visceral metastasis appeared to be risk factors for the CSS in the SHTs-DOC group. The patients with pain and/or visceral metastasis had significantly poorer survival than those without these factors in the SHTs-DOC group (31.5 months vs. 16.8 months, P = 0.0053).ConclusionThe induction of SHTs prior to docetaxel therapy is an acceptable treatment option with some survival benefits for CRPC patients without pain and visceral metastases