Siloxy-Substituted Group IV Metallocene Catalysts

1999 ◽  
pp. 31-47
Author(s):  
Reko Leino ◽  
Hendrik J. G. Luttikhedde
Keyword(s):  
Group Iv ◽  
Metallocene Catalysts

Synthesis of new poly(2,4-disilapentane) oligomers via dehydrocondensation reaction using Group IV metallocene catalysts

1995 ◽  
Vol 499 (1-2) ◽  
pp. 199-204 ◽  
Author(s):  
Philippe Roux ◽  
Jean-Paul Pillot ◽  
Marc Birot ◽  
Jacques Dunoguès ◽  
P. Lapouyade
Keyword(s):  
Group Iv ◽  
Metallocene Catalysts

Luminescence from individual dislocations in II-VI and III-V semiconductors

1991 ◽  
Vol 49 ◽  
pp. 834-835
Author(s):  
J W Steeds
Keyword(s):  
Group Iv ◽  
Luminescence Properties ◽  
Carrier Recombination ◽  
Transmission Electron ◽  
Wide Range ◽  
Basic Physics ◽  
Semiconducting Compounds ◽  
Diamond Group ◽  
Non Destructive ◽  
Technological Significance

There is a wide range of experimental results related to dislocations in diamond, group IV, II-VI, III-V semiconducting compounds, but few of these come from isolated, well-characterized individual dislocations. We are here concerned with only those results obtained in a transmission electron microscope so that the dislocations responsible were individually imaged. The luminescence properties of the dislocations were studied by cathodoluminescence performed at low temperatures (~30K) achieved by liquid helium cooling. Both spectra and monochromatic cathodoluminescence images have been obtained, in some cases as a function of temperature.There are two aspects of this work. One is mainly of technological significance. By understanding the luminescence properties of dislocations in epitaxial structures, future non-destructive evaluation will be enhanced. The second aim is to arrive at a good detailed understanding of the basic physics associated with carrier recombination near dislocations as revealed by local luminescence properties.

ISOMER-SHIFT SYSTEMATICS OF 57Co IMPLANTED IN GROUP IV SEMICONDUCTORS

1976 ◽  
Vol 37 (C6) ◽  
pp. C6-893-C6-896 ◽  
Author(s):  
G. WEYER ◽  
G. GREBE ◽  
A. KETTSCHAU ◽  
B. I. DEUTCH ◽  
A. NYLANDSTED LARSEN ◽  
...  
Keyword(s):  
Isomer Shift ◽  
Group Iv ◽  
Group Iv Semiconductors

Anti-diabetic activity of diphenhydramine in diabetic rats

2020 ◽  
Vol 11 (4) ◽  
pp. 5067-5070
Author(s):  
Pang Jyh Chayng ◽  
Nurul Ain ◽  
Kaswandi Md Ambia ◽  
Rahim Md Noah
Keyword(s):  
Blood Glucose ◽  
Blood Glucose Level ◽  
Glucose Level ◽  
Fasting Blood Glucose ◽  
Insulin Level ◽  
Diabetic Rats ◽  
Group Iv ◽  
Diabetic Rat ◽  
Control Group ◽  
Group I

The purpose of this project is to study the anti-diabetic effect of on a diabetic rat model. A total of Twenty male Sprague rats were used and it randomly distributed into four groups which are Group I: , Group II: negative control, Group III: and Group IV: and . In diabetic model were induced with via injection at the dosage of 65mg/kg. and FBG (Fasting Blood Glucose) level of diabetic rats were assessed every three days. Blood was collected via cardiac puncture at day 21 after the induction of treatment. Insulin level of the rats was assessed with the Mercodia Rat Insulin ELISA kit. FBG level of group I (12.16 ±3.96, p<0.05) and group IV (11.34 ±3.67, p<0.05) were significantly decreased. Meanwhile, the for all rats did not show any significant increase. However, the insulin level was escalated in group IV (0.74+0.25, p<0.05) significantly. The present study shows that the and the combination of and lowered blood glucose level and enhanced insulin secretion.

Surface Chemistry Effects on Quantum Confinement in Group IV Nanocrystals

2019 ◽  
Author(s):  
Nathan Neale ◽  
Michael Carroll ◽  
Rens Limpens ◽  
Lance Wheeler ◽  
Gregory Pach
Keyword(s):  
Surface Chemistry ◽  
Quantum Confinement ◽  
Group Iv

Different Treatment Protocols of Retained Fetal Membranes and its Effect on Serum Profile, Uterine Involution and Postpartum Fertility in Cows

2019 ◽  
Vol 14 (04) ◽  
Author(s):  
A. I. Shah ◽  
D. M. Patel ◽  
N. P. Sarvaiya ◽  
S. P. Madhira
Keyword(s):  
Group Iv ◽  
Fetal Membranes ◽  
Serum Progesterone ◽  
Group V ◽  
Manual Removal ◽  
Uterine Involution ◽  
Group I ◽  
Medicinal Treatment ◽  
Group Ii ◽  
Postpartum Estrus

This study was undertaken on 36 freshly calved cows randomly divided into 6 equal groups under field conditions. Cows of group-VI that shed placenta within 8-12 hours postpartum naturally served as healthy control. The cows with retained fetal membranes (RFM, n = 18) for more than 12 hrs were managed either by manual removal of placenta without antibiotics (group-I), parenteral antibiotic (Ceftiofur 1 g i/m) for three consecutive days (group-II) or a combination of both (group-III). In group-IV and group-V, cows were administered with Inj. Oxytocin @ 50 IU i/m and Inj. Dinoprost tromethamine (PGF2α) @ 25 mg i/m, respectively, immediately after parturition and time of placental shedding was recorded. The overall prevalence of Brucellosis by RBPT was found to be 5.55 % amongst these 36 animals. The placental expulsion in groups following medicinal treatment was found to be 50 (3/6) % in Ceftiofur alone by 3 days (group-II), and 66.67 (4/6) % in Oxytocin (group-IV) and 100 (6/6) % in PGF2α inj. (group-V) groups within 12 hrs. The time of uterine involution in groups I to VI was found to be 42.00 ± 1.94, 39.50 ± 0.99, 40.67 ± 1.39, 38.33 ± 1.55, 37.50 ± 1.02 and 37.33 ± 1.76 days, respectively, while the interval for the appearance of first postpartum estrus was 54.83 ± 2.06, 51.00 ± 1.05, 52.17 ± 1.96, 50.17 ± 2.03, 48.67 ± 1.90 and 49.17 ± 1.55 days, respectively, which did not vary statistically. The mean serum progesterone profile obtained on day 0 and day 21 postpartum was statistically non-significant between groups. However, it was significantly (p less than 0.05) lower on day 0 as compared to day 21 in group-I, II and VI. The levels on day 0 coincided with the time of blood sampling after calving. The high level of serum P4 on day 0 in group-IV and V could be due to sampling immediately after calving. The serum calcium and phosphorus levels were significantly(p less than 0.05) lower on day 0 than on day 21, but not the magnesium. The group effect was however non-significant for any of three minerals. It was observed that manual removal of RFM without parenteral antibiotics, resulted in puerperal metritis, cervicitis, pyometra which ultimately resulted into delayed uterine involution, delayed first postpartum estrus and thus, reduced the postpartum reproductive efficiency. It was inferred that the PGF2α and Oxytocin injections could be used as a treatment of choice for prevention of RFMs in cattle.

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