POLYSACCHARIDE-PEPTIDE COMPLEXES FROM SERRATIA MARCESCENS CELLS

1964 ◽  
Vol 42 (5) ◽  
pp. 593-603 ◽  
Author(s):  
Hugh J. Creech ◽  
Evelyn R. Breuninger ◽  
G. A. Adams
Keyword(s):  
Chemical Composition ◽  
Serratia Marcescens ◽  
High Speed ◽  
Complete Removal ◽  
Complete Regression ◽  
Aqueous Extracts ◽  
Amino Acid Residues ◽  
Phenol Extraction ◽  
Peptide Complexes ◽  
Antitumor Properties

Determinations were made of the chemical composition and antitumor properties of several polysaccharide fractions obtained by high speed centrifugation of aqueous extracts of the cells of Serratia marcescens following phenol extraction and trypsin digestion. The use of methods that ensured complete removal of lipid gave polysaccharides containing firmly bound amino acid residues. These were highly effective in causing complete regression of well established solid tumors in mice. The products derived primarily from the cell wall were more potent than the polysaccharides of extracellular and cytoplasmic origins. Extensive differences were also noted in the chemical composition of the polysaccharide complexes isolated from the two sources.

Endoscopy-assisted removal of periorbital inclusion cysts in children

2011 ◽  
Vol 7 (2) ◽  
pp. 161-164 ◽  
Author(s):  
George Chater-Cure ◽  
Caitlin Hoffman ◽  
Jared Knopman ◽  
Samuel Rhee ◽  
Mark M. Souweidane
Keyword(s):  
High Speed ◽  
Complete Removal ◽  
Skin Incision ◽  
Clinical Findings ◽  
Complete Excision ◽  
Alternative Approach ◽  
Cyst Recurrence ◽  
Scalp Incision ◽  
Access Technique

Object Surgical treatment for periorbital inclusion cysts typically involves a brow, pterional, or partial bicoronal scalp incision for sufficient exposure. The authors have recently employed an endoscopy-assisted technique as an alternative approach intended to minimize the length of the skin incision and avoid scarring in the brow. Methods Children having typical clinical findings of a dermoid cyst located on the hairless forehead were selected to undergo endoscopy-assisted cyst removal. For suspected intradiploic lesions, MR imaging was used to assess osseous involvement. After induction of general anesthesia, a 1–2-cm curvilinear incision was made posterior to the hairline. A 30°-angled endoscope (4 mm) was then used for dissection in the subgaleal compartment. Subgaleal dissection was followed by a circumferential periosteal incision in which the authors used an angled needle-tip unipolar cautery. For lesions within the diploe, a high-speed air drill was used to expose the lesion. Complete removal was accomplished with curettage of either the skull or dural surface. Results Eight patients (5–33 months of age) underwent outpatient endoscopic resection. Seven cysts were extracranial, and 1 cyst extended through the inner table. In all patients complete excision of the cyst was achieved. There was negligible blood loss, no dural violation, and no postoperative infection. There have been no recurrences at a mean follow-up of 15 months. Conclusions Endoscopy-assisted resection of inclusion cysts of the scalp and calvaria is a safe and effective surgical approach. The technique results in negligible incisions with less apparent scarring compared with previously described incisions. This limited-access technique does not appear to be associated with a higher incidence of cyst recurrence.

The Fracture Failure Analysis of Precision Centrifuge Spindle

2014 ◽  
Vol 971-973 ◽  
pp. 802-805
Author(s):  
Wei Feng Zhang ◽  
Li Yan ◽  
Fu Xia Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Chemical Composition ◽  
Fracture Mechanics ◽  
Failure Analysis ◽  
Fatigue Failure ◽  
High Speed ◽  
Experimental Results ◽  
Fracture Failure ◽  
Scanning Electron

For the problem of high-speed rotating centrifuge spindle fracture failures, relevant analyses are conducted from the perspective of microstructure, chemical composition and fracture mechanics by using scanning electron microscopy and related instruments. Experimental results and analyses indicate that the spindle fracture is fatigue failure, mainly caused by cold cracks generated on the journal surfacing. Based on the analysis results, improvements and measures are suggested to better solve the spindle weld fracture failure problems.

Inaktivierung von Bakterien mittels einzelner Elektronenimpulse

1960 ◽  
Vol 15 (6) ◽  
pp. 372-374 ◽  
Author(s):  
D. L. Dewey ◽  
J. W. Boag
Keyword(s):  
Dissolved Oxygen ◽  
Serratia Marcescens ◽  
Chemical Reactions ◽  
Large Dose ◽  
Single Pulse ◽  
Complete Removal ◽  
Oxygen Effect ◽  
Pulse Dose ◽  
Radiation Induced

Experiments on the inactivation of the bacterium Serratia Marcescens by radiation have shown that the normal “oxygen effect” is absent when a large dose is given in a single pulse of duration 2 μsec. This appears to be due to the complete removal of the dissolved oxygen by the early part of the pulse dose, as a result of radiation-induced chemical reactions.

Sludge chemical composition changes under uni-directional freezing

1996 ◽  
Vol 34 (3-4) ◽  
pp. 525-531 ◽  
Author(s):  
W. T. Huang ◽  
I. L. Chang ◽  
D. J. Lee ◽  
S. G. Hong
Keyword(s):  
Chemical Composition ◽  
Activated Sludge ◽  
High Speed ◽  
Ftir Spectra ◽  
Ice Formation ◽  
Waste Activated Sludge ◽  
Chemical Compositions ◽  
Low Speed ◽  
Directional Freezing ◽  
Composition Changes

The chemical compositions changes for waste activated sludge at different freezing speeds were analyzed via FTIR spectra. With a high speed of freezing, the chemical compositions are little influenced by the action of ice formation, which with a low speed of freezing, the chemical compositions are largely affected. The prerequisite for sufficient dewaterability improvement is found as the global floc migration owing to the ice front formation, which releases some ECPs (basically cellulose) from the sludge and after the resulting cake structure ultimately.

Research of Effect of the Powder Material Quality in the Structure Formation of the DLD Inconel 718 Samples

2019 ◽  
Vol 822 ◽  
pp. 404-409
Author(s):  
S.S. Silchonok ◽  
G.G. Zadykyan ◽  
Oleg G. Zotov ◽  
Iuliia N. Morozova
Keyword(s):  
Chemical Composition ◽  
Nickel Alloy ◽  
Structure Formation ◽  
Powder Material ◽  
Inconel 718 ◽  
High Speed ◽  
Laser Deposition ◽  
Structure And Properties ◽  
Direct Laser ◽  
Deposition Technology

This article is devoted to Inconel 718 heat-resistant nickel alloy. Comparison of samples obtained by high-speed direct laser deposition technology of powders from different manufacturers on their structure and properties was carried out. The dependence of the influence of the chemical composition of the powders on the formation of defects in the studied samples was established

Comparison between the aqueous extracts of mycelium and basidioma of the edible mushroom Pleurotus pulmonarius: chemical composition and antioxidant analysis

2019 ◽  
Vol 14 (2) ◽  
pp. 830-837 ◽  
Author(s):  
Alex Graça Contato ◽  
Fabíola Dorneles Inácio ◽  
Caroline Aparecida Vaz de Araújo ◽  
Tatiane Brugnari ◽  
Giselle Maria Maciel ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Edible Mushroom ◽  
Aqueous Extracts ◽  
Pleurotus Pulmonarius
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