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https://www.readbyqxmd.com/read/28329922/recurrent-abdominal-pain-after-laparoscopic-appendectomy
#1
Kwang Il Seo, Sung Eun Kim, Moo In Park, Seun Ja Park, Won Moon, Jae Hyun Kim, Kyoungwon Jung, Jung Gu Park
Laparoscopic surgical approaches, compared with open surgical approaches, provide comparable clinical outcomes, but lower complications. Unfortunately, a rare complication-portomesenteric vein thrombosis-had been reported after laparoscopic surgery. A 42-year-old woman was referred our hospital for recurrent abdominal pain after laparoscopic appendectomy from acute appendicitis. It was determined that abdominal pain was due to postoperative superior mesenteric vein thrombus. A six-month anticoagulation therapy is an excellent treatment for superior mesenteric vein thrombus ...
March 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28327771/the-roles-of-surface-chemistry-dissolution-rate-and-delivered-dose-in-the-cytotoxicity-of-copper-nanoparticles
#2
Miao Shi, Karen L de Mesy Bentley, Goutam Palui, Hedi Mattoussi, Alison Elder, Hong Yang
The understanding of nanoparticle (NP) cytotoxicity is challenging because of incomplete information about physicochemical changes particles undergo once they come into contact with biological fluids. It is therefore essential to characterize changes in NP properties to better understand their biological fate and effects in mammalian cells. In this paper, we present a study on the effect of particle surface oxidation and dissolution rates of Cu NPs. Particle dissolution, cell-associated Cu doses, and oxidative stress responses in A549 luciferase reporter cells were examined for Cu NPs modified with mercaptocarboxylic acids with different carbon chain lengths and a thiotic acid appended-PEG ligand (TA)...
March 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28327738/hydroxide-bridged-dicopper-complexes-the-influence-of-secondary-coordination-sphere-on-structure-and-catecholase-activity
#3
Deepak Bansal, Rajeev Gupta
Amide-based ligands (H2L(1-6)) with assorted functional groups appended to them have been used for the synthesis of dicopper(ii) complexes 1-6 having a Cu(μ-OH)Cu core. The crystal structures of 1-6 show that while every Cu(ii) ion is ligated within the N3 pincer cavity of a potentially multidentate ligand, two Cu(ii) centers are bridged by a hydroxide group. Notably, the Cu(μ-OH)Cu core is encased within the secondary coordination sphere intricately created by the appended groups. While complexes 1 and 2 exhibit the presence of an H-bond acceptor in the proximity of the Cu(μ-OH)Cu core, complexes 3 and 4 display the occurrence of both the H-bond donor as well as H-bond acceptor groups in the vicinity of the Cu(μ-OH)Cu core...
March 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28325342/cyclodextrin-based-sustained-and-controllable-release-system-of-insulin-utilizing-the-combination-system-of-self-assembly-pegylation-and-polypseudorotaxane-formation
#4
Tatsunori Hirotsu, Taishi Higashi, Keiichi Motoyama, Hidetoshi Arima
Sustained and controllable release of insulin is strongly required to achieve the ideal treatment of diabetes. We previously developed "self-assembly PEGylation retaining activity (SPRA) technology" via a host-guest interaction between PEGylated β-cyclodextrin and adamantane-appended insulin, and resulting PEGylated insulin was termed SPRA-insulin. So far, we also demonstrated that covalently PEGylated insulin forms polypseudorotaxanes (PPRXs) with cyclodextrins (PPRX technology). In the present study, we designed and evaluated the combination system of SPRA technology and PPRX technology to achieve a sustained and controllable release system of insulin...
May 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28319797/non-enolisable-knoevenagel-condensate-appended-schiff-bases-metal-ii-complexes-spectral-characteristics-dna-binding-and-nuclease-activities
#5
Ammavasi Gubendran, Mookkandi Palsamy Kesavan, Srinivasan Ayyanaar, Liviu Mitu, Periyakaruppan Athappan, Jegathalaprathaban Rajesh
New Schiff base complexes [Cu(L(1))Cl] (1), [Ni(L(1))Cl] (2), [Zn(L(1))Cl] (3), and [Fe(L(2))H2OCl] (4) {L(1)=(4E)-3-(2-hydroxybenzylidene)-4-(2-hydroxyphenylimino)pentan-2-one, L(2)=2,2'-(1E,1'E)-(3-(2-hydroxybenzylidene)-pentane-2,4-diylidene)bis(azan-1-yl-1 idene)diphenol} have been synthesized and characterized by elemental analysis, UV-Vis, IR, FAB-mass, EPR, spectral studies and electrochemical studies, the ligands L(1) &L(2) were characterized by (1)H and (13)C NMR spectra. Complex 1 show a visible spectral d-d band near 600nm and display cyclic voltammetric quasireversible response for the Cu(II)/Cu(I) couple vs Ag/AgCl in DMSO...
March 16, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28317965/direct-observation-of-the-rise-of-delayed-fluorescence-in-dithienylbenzothiadiazole-and-its-role-in-the-excited-state-dynamics-of-a-donor-acceptor-donor-molecule
#6
Maneesha Esther Mohanty, Chakali Madhu, Vanammoole Lakshmi Reddy, Mahalingavelar Paramasivam, Prakriti Ranjan Bangal, Vaidya Jayathirtha Rao
Dithienylbenzothiadiazole (DTBT) is used as a building block in several molecules having application in organic light emitting devices (OLED) and organic photovoltaic (OPV) devices. Delayed fluorescence (DF) is the preferred design principle employed currently in OLED research. DTBT has excellent delayed fluorescence properties which makes this moiety a potentially viable OLED material. Here, the dynamics of intersystem crossing (ISC) and reverse intersystem crossing (RISC) have been explored using fluorescence, phosphorescence, fluorescence lifetime and transient absorption measurements...
March 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28317962/-phsio1-5-8-10-12-as-nanoreactors-for-non-enzymatic-introduction-of-ortho-meta-or-para-hydroxyl-groups-to-aromatic-molecules
#7
Mozhgan Bahrami, Xingwen Zhang, Morteza Ehsani, Yousef Jahani, Richard M Laine
Traditional electrophilic bromination follows long established "rules": electron-withdrawing substituents cause bromination selective for meta positions, whereas electron-donating substituents favor ortho and para bromination. In contrast, in the [PhSiO1.5]8,10,12 silsesquioxanes, the cages act as bulky, electron withdrawing groups equivalent to CF3; yet bromination under mild conditions, without a catalyst, greatly favors ortho substitution. Surprisingly, ICl iodination without a catalyst favors (>90%) para substitution [p-IC6H4SiO1...
March 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28314180/tetra-2-3-pyrazinoporphyrazines-with-externally-appended-pyridine-rings-17-photosensitizing-properties-and-cellular-effects-of-zn-ii-octacationic-and-zn-ii-pt-ii-hexacationic-macrocycles-in-aqueous-media-perspectives-of-multimodal-anticancer-potentialities
#8
Elisa Viola, Maria Pia Donzello, Fabiola Sciscione, Kous Shah, Claudio Ercolani, Giuseppe Trigiante
The photosensitizing activity of two multiply charged porphyrazine derivatives, i.e. the Zn(II) species [(CH3)8LZn](8+) and the Zn(II)/Pt(II) heterobimetallic complex [(PtCl2)(CH3)6LZn](6+) (neutralized byI(-) ions; L=tetrakis-2,3-[5,6-di(2-pyridyl)pyrazino]porphyrazinato dianion) has been examined in the water medium in the presence of SDS under experimental conditions in which the two species are present exclusively in their monomeric form. The determined quantum yield values (ΦΔ) for both complexes, of interest in photodynamic therapy (PDT), are 2...
March 9, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28306630/nonoperative-management-of-appendicitis-in-children
#9
Joseph J López, Katherine J Deans, Peter C Minneci
PURPOSE OF REVIEW: The aim of this review is to summarize the recent literature investigating nonoperative management of uncomplicated and complicated appendicitis and highlight recent data establishing its safety and efficacy. RECENT FINDINGS: Recent studies and clinical trials have demonstrated the efficacy of nonoperative treatment of both uncomplicated and complicated appendicitis, defined as perforated appendicitis with or without formed abscess or phlegmon...
March 16, 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28304032/facile-synthesis-of-chlorin-bioconjugates-by-a-series-of-click-reactions
#10
Junior Gonzales, N V S Dinesh K Bhupathiraju, William Perea, Huong Chu, Naxhije Berisha, Veronica Bueno, Naser Dodic, Julia Rozenberg, Nancy L Greenbaum, Charles Michael Drain
A multifunctional chlorin platform appended with four short polyethylene glycols and a carboxylate-linker allows rapid conjugation to biotargeting motifs such as proteins and oligonucleotides. The stability and photophysical properties of the chlorin enable development of diagnostics, imaging, molecular tracking, and theranostics.
March 17, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28302663/amyand-s-hernia-containing-an-appendiceal-goblet-cell-carcinoid-tumour
#11
Zarif Yahya, Chien-I Wang, Boon Hong
Amyand's hernia is a rare occurrence where the appendix is trapped within an inguinal hernia. Appendicitis within the hernia is even rarer. However, the presence of an appendiceal neoplasm in an inguinal hernia is almost unheard of with only two cases reported in the literature. We present an extremely rare case of an inflamed appendix within an Amyand's hernia, which was found to be a goblet cell type carcinoid tumour requiring further oncological resection and treatment.
March 16, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28302449/is-laparoscopic-appendectomy-feasible-for-complicated-appendicitis-a-systematic-review-and-meta-analysis
#12
REVIEW
Man-Cheng Yu, Yao-Jun Feng, Wei Wang, Wei Fan, Hong-Tao Cheng, Juan Xu
BACKGROUND: laparoscopic appendectomy(LA) has proved to be a safe alternative to open appendectomy(OA) in uncomplicated appendicitis; however, the feasibility of LA for complicated appendicitis(CA) has not been conclusively determined. OBJECTIVES: To assess the feasibility and safety of LA for CA through a systematic review and meta-analysis. METHODS: A literature search in PubMed, Embase, Cochrane Library, and web of Science was performed for eligible studies published from the inception of the databases to January 2016...
March 14, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28302361/unexpected-findings-after-surgery-for-suspected-appendicitis-rarely-change-treatment-in-pediatric-patients-results-from-a-cohort-study
#13
Ramon R Gorter, Paul van Amstel, Johanna H van der Lee, Patick van der Voorn, Roel Bakx, Hugo A Heij
BACKGROUND: To determine if non-operative treatment is safe in children with acute appendicitis, we evaluated the incidence of unexpected findings after an appendectomy in children, and the influence they have on subsequent treatment. METHODS: A historical cohort study (January 2004-December 2014) was performed including children, aged 0-17 years, who underwent an appendectomy for the suspicion of acute appendicitis. Patients were divided based upon histopathological examination...
March 6, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28302241/neonatal-appendicitis-as-a-rare-cause-of-intestinal-perforation-in-a-preterm-neonate
#14
Seda Yilmaz Semerci, Dilek Kurnaz, Aslan Babayigit, Burcu Cebeci, Gokhan Buyukkale, Merih Cetinkaya, Unal Guvenc, Ozge Kucur
Intestinal perforation or inflammation due to appendicitis is rarely encountered in the neonatal period. The diagnosis may be delayed due to the lack of specific clinical symptoms and its rarity in this patient population. Early surgical treatment is the main treatment strategy with a good prognosis. However, delayed diagnosis may result in complications and even death. Herein, we describe a late preterm female neonate without any risk factors who had a diagnosis of perforated appendicitis at postnatal day 5...
March 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28302233/an-unusual-case-of-caecal-volvulus-due-to-appendicitis-successfully-managed-by-caecopexy
#15
Samiullah Bhatti, Mahmood Ayyaz Khan, Waris Farooka, Usman Ismat Butt, Usman Ali Rehman, Awais Amjad Malik
Caecal volvulus is a rare cause of intestinal obstruction. Caecal volvulus precipitated by acute appendicitis is even rarer. We report an unusual case of caecal volvulus with acute appendicitis as a cause. A 55-year female presented in surgical emergency with 3 days history of abdominal pain, distension and absolute constipation; and 2 days history of vomiting. Her past surgical history was significant for hysterectomy 5 years back. On examination, abdomen was distended and bowel sounds exaggerated. X-ray abdomen erect showed a single large air fluid level in the right hemiabdomen...
March 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28301395/increased-anatomic-severity-in-appendicitis-is-associated-with-outcomes-in-a-south-african-population
#16
Matthew C Hernandez, Victor Y Kong, Johnathon M Aho, John L Bruce, Stephanie F Polites, Grant L Laing, Martin D Zielinski, Damian L Clarke
BACKGROUND: Severity of emergency general surgery diseases (EGS) has not been standardized until recently. The American Association for the Surgery of Trauma (AAST) proposed an anatomic severity grading system for EGS diseases to facilitate communication and quality comparisons between providers and hospitals. Previous work has demonstrated validity of the system for appendicitis in the United States. In order to demonstrate generalizability, we aim to externally validate this grading system in South African patients with appendicitis...
March 15, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28301209/comparison-of-low-and-standard-dose-ct-for-the-diagnosis-of-acute-appendicitis-a-meta-analysis
#17
Seong Jong Yun, Chang-Woo Ryu, Na Young Choi, Hyun Cheol Kim, Ji Young Oh, Dal Mo Yang
OBJECTIVE: A meta-analysis was performed to compare low-dose CT and standard-dose CT in the diagnosis of acute appendicitis with an emphasis on diagnostic value. MATERIALS AND METHODS: A systematic literature search for articles published through June 2016 was performed to identify studies that compared low-dose CT with standard-dose CT for the evaluation of patients suspected of having acute appendicitis. Summary estimates of sensitivity and specificity with 95% CIs were calculated using a bivariate random-effects model...
March 16, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28301145/photodissociation-electronic-spectra-of-cold-protonated-quinoline-and-isoquinoline-in-the-gas-phase
#18
Géraldine Féraud, Luis Domenianni, Ernesto Marceca, Claude Dedonder-Lardeux, Christophe Jouvet
Photofragmentation electronic spectra of isolated single-isomeric N-protonated quinoline (quinolinium) and isoquinoline (isoquinolinium) ions have been measured at a temperature of ∼40 K using a mass-selective, 10 cm(-1) spectral resolution, photodissociation spectrometer. Additionally, ab-initio adiabatic transition energies calculated using the RI-ADC(2) method have been employed to assist in the assignment of the spectra. Three electronic transitions having ππ* character were clearly evidenced for both protonated ions within the UV and deep-UV spectral ranges...
March 16, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28300390/recruitment-and-regulation-of-the-non-ribosomal-peptide-synthetase-modifying-cytochrome-p450-involved-in-nikkomycin-biosynthesis
#19
Courtney E Wise, Thomas M Makris
The beta-hydroxylation of L-histidine is the first step in the biosynthesis of the imidazolone base of the antifungal drug nikkomycin. The cytochrome P450 (NikQ) hydroxylates the amino acid while it is appended via a phosphopantetheine linker to the non-ribosomal peptide synthetase (NRPS) NikP1. The latter enzyme is comprised of an MbtH, and single adenylation and thiolation domains, a minimal composition that allows for detailed binding and kinetics studies using an intact and homogeneous NRPS substrate. Electron paramagnetic resonance studies confirm that a stable complex is formed with NikQ with NikP1 when the amino acid is tethered...
March 16, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28295983/appendiceal-intussusception-causing-appendicitis
#20
Du H L Phan, Michael K-Y Hong, Matthew J Morgan
No abstract text is available yet for this article.
March 15, 2017: ANZ Journal of Surgery
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