Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 131-136 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Soft materials have long been sought after for use in devices such as actuators, artificial muscles, separators, switches, sensors, memories, and so forth. We developed a soft, optically transparent material using polymer gels that can not only be activated by visible light (switched on) but also deactivated (switched off) by altering the local environment using three different means: pH, temperature, and light. This copolymer gel is a covalently cross-linked network of N-isopropylacrylamide, sodium acrylate, and a chromophore, which is found to undergo phase transitions exhibiting large hysteresis in the degree of swelling in response to pH, temperature, and light. In each system, between the transitions for swelling and shrinking, the gel can show either a swollen or a collapsed state, which can be selected according to the history of the variables. It has been established that a thermoresponsive gel with chromophore exhibits a local volume phase transition upon illumination with visible light. By making use of this phenomenon, we have successfully controlled the phase in which a gel exists with visible light: Without light illumination the gel stays in the swollen state. Upon illumination beyond a threshold intensity, however, a volume transition is locally induced, thereby forming a material in which both phases coexist stably for at least several hours after the light source has been removed. The phenomenological stability of the material in the coexistence state is discussed on the basis of the Landau theory. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Suite 500, 5th Floor, 238 Main Street, Cambridge Massachusetts 02142, USA : Blackwell Science Inc.
    International journal of gynecological cancer 6 (1996), S. 0 
    ISSN: 1525-1438
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The Prognostic significance of lymphvascular invasion (LVI) in stage: IB cervix cancer remains controversial in spite of several recent reports in this literature. This report analyses the impact of LVI in patients undergoing surgery followed by postoperative radiation therapy.The clinical-pathological records of 110 patients with stage IB carcinoma of the cervix cancer remains controversial in spite of several recent reports in this literature. This report analyses the impact of LVI in patients undergoing surgery followed bu postoperative radiation therapy.sessed for grade, positive margins, depth of invasion, positive nodes, and LVI. Only LVI showed a significant correlation (P = 0.0002) with local failure. Thirty-two patients with squamous cell carcinoma and LVI were identified. Seventeen of these patients received postoperative radiotherapy and 15 patients received no adjuvant therapy. Both groups were traced for outcome. Four of the 15 patients (27%) with LVI treated with surgery alone developed local recurrence, compared to 0/17 patients who received postoperative radiotherapy (P = 0.038). The 5-year and 7-year survival of the entire group was excellent, 97.2% and 94.9% respectively. There was a trend towards significance (P = 0.07) in survival between LVI+ and LVI− patients.Lymphvascular invasion was significantly associated with increased local failure in our analysis. Although prospective randomized trials are in progress to further evaluate this issue there is growing concern about low accrual because of physicians biases regarding this controversial issue. Adjuvant postoperative radiotherapy appears beneficial in improving local control for LVI patients in our study, but its impact on survival is still questionable. We recommend enrollment of patients in a national cooperative trial whenever possible. Treatment of patients off protocol solely for LVI+ is still quite controversial and must be left to the discretion of the clinician.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 400-403 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound {alternative nomenclature: 2-[4,5-bis(methylthio)-1,3-dithiol-2-ylidene]-5,6-dihydro-1,3-dithiolo[4,5-b][1,4]dithiine}, C10H10S8, is a molecular crystal with typical values for bond distances and angles. The molecules form columns along the c axis. The intermolecular S...S distances indicate the presence of van der Waals interactions between the columns.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plastic surgery 22 (1999), S. 270-272 
    ISSN: 1435-0130
    Keywords: Key words Glabella reconstruction ; Topographic unit and subunit ; Glabella flap
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Topographic units of the face have been described previously. Recently, the miniunit has been used as a means of minimizing the sacrifice of normal remnant tissue. This paper describes a technique that considers the glabella subunit and miniunit and applies this principle to the required reconstruction.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plastic surgery 22 (1999), S. 182-185 
    ISSN: 1435-0130
    Keywords: Key words Stepladder technique ; V-Y advancement flap ; Sacrogluteal defects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Gluteal stepladder V-Y advancement musculocutaneous and fasciocutaneous flaps were used for resurfacing of various shaped sacrogluteal defects. A total of 27 patients with sacrogluteal defects were treated using this technique. Twenty-four patients had sacral pressure sores, 2 patients had a pilonidal sinus, and 1 had a low thermal burn of the gluteal region. The shape of defects varied including 12 elliptic, 5 inverted heart-shaped, 4 pentagon, 4 diamond, and 2 other shapes. There were no problems regarding flap survival even at the tip of step segments. In all patients, easy resurfacing of the defects and satisfactory recontour of the gluteal region was obtained without linear scars crossing the gluteal fissure. Since the segments of the flap are similar to the defect, defects of various shapes are easily covered, and trimming of normal skin tissue becomes unnecessary or minimal. On inserting a triangular flap in the gluteal fissure, excellent recontour of the sacrogluteal region can be achieved.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plastic surgery 19 (1996), S. 136-138 
    ISSN: 1435-0130
    Keywords: Groin flap ; Lower abdominal defect ; VY advancement flap
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Repair of lower abdominal defects with bilateral groin VY advancement flaps is presented. This procedure allows a reliable reconstruction to be performed easily with good aesthetic results.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Surgical endoscopy and other interventional techniques 12 (1998), S. 1186-1188 
    ISSN: 1432-2218
    Keywords: Key words: Laparoscopic cholecystectomy — Intraoperative ultrasonography — Miniature probe — Cystic duct — Bile duct injury
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We performed intraoperative ultrasonography with a miniature probe to explore the biliary anatomy, especially the cystic duct, during laparoscopic cholecystectomy. By using this radial-type probe introduced into a hard metal sheath with a balloon at the end, the plane containing Calot's triangle can be scanned easily when the gallbladder is extracted to the right side, thereby facilitating the identification of the cystic duct as well as the common ducts. In 30 cases, no common duct stone was found and the cystic duct was clearly identified. This radial-type miniature probe can be used to locate the cystic duct and avoid inadvertant incision or division of the common ducts.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 222 (1997), S. 105-108 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A series of metal β-diketonates were irradiated with bremsstrahlung of maximum energy of 50 MeV and the recoil behavior of7Be, formed from12C of ligands through12C(γ, αn)7Be reaction, was investigated.7Be nuclides thus formed were detected partially as central metal atoms of the complexes. Complex yields of7Be were compared and an anomalously high yield was observed in tris-acetylacetonatocobalt(III) [Co(acac)3].
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 231 (1998), S. 63-64 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract NaCl solutions containing carrier-free125mTe(IV) and125mTe(VI) have been prepared. The effect of the presence of various substances on the colloidal behavior of125mTe in solution has been studied by ultracentrifugation. It has been found that phosphate, sulfide and oxalate ions which complex with various elements decrease the colloidal formation of125mTe. In order to estimate the size of colloidal particles, the NaCl solutions containing carrier-free125mTe have been microfiltered through membrane filters with various pore size.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...