101
|
Yu J, Liu B, Fan B, Zhu MJ, Xiong TA, Yu M, Li K, Zhao SH. The porcine FBXO32 gene: map assignment, SNP detection and tissue expression. Anim Genet 2006; 36:451-2. [PMID: 16167995 DOI: 10.1111/j.1365-2052.2005.01339.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
102
|
Fan W, Fan B, Gutmann JL, Bian Z, Fan MW. Evaluation of the accuracy of three electronic apex locators using glass tubules. Int Endod J 2006; 39:127-35. [PMID: 16454793 DOI: 10.1111/j.1365-2591.2006.01056.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIM To evaluate the accuracy of three different electronic apex locators (EALs) using glass tubules. METHODOLOGY Forty-eight glass tubules with different diameters and an agar model were used to mimic root canals. A size 15 stainless steel K-file was used as the measuring electrode. The Root ZX, Propex and Neosono Ultima EZ were used to measure the tubule length with tubules dry, or filled with 0.9% NaCl, 3% H(2)O(2), 2.5% NaOCl or 17% EDTA. The distance between the real length (RL) and measured length (ML) of the tubules was recorded. The range of RL +/- 0.5 mm and RL +/- 1 mm was used to evaluate the accuracy of the EALs. Results were subject to correlation analysis and Friedman's test. RESULTS In dry tubules, the accuracy of Root ZX was 75-91.7% for RL +/- 0.5 mm and 100% for RL +/- 1 mm, whilst the measurements of the other two EALs were all within the RL +/- 0.5 mm. No influence from the increase in tubule diameter on the accuracy of all three EALs was observed in dry tubules. In tubules filled with electrolyte, the accuracy of the Root ZX decreased as tubule diameter increased (R(d) > 0, P < 0.05). The RL-ML distance recorded by Propex was inversely related to the tubule diameter (R(d) < 0, P < 0.05). The accuracy of Propex was 75-100% for RL +/- 0.5 mm and 100% for RL +/- 0.5 mm when the tubule diameter was not more than 0.80 mm, but decreased in tubules with diameter over 0.80 mm and filled with 2.5% NaOCl or 17% EDTA. Nearly, all the measurements (except for six tubules) using Neosono Ultima EZ were within 1 mm shorter than RL despite the contents in tubules and the increase of tubule diameter. CONCLUSIONS The accuracy of the Root ZX decreased as the tubule diameter increased when tubules were filled with electrolytes. The electrolytes in the tubules decreased the accuracy of Propex when the tubule diameter was large. The electrolytes in tubules and tubule diameter had no influence on the accuracy of Neosono Ultima EZ. The Propex and Neosono Ultima EZ were more accurate than the Root ZX under various conditions in this laboratory study.
Collapse
|
103
|
Shepherd JA, Fan B, Lu Y, Lewiecki EM, Miller P, Genant HK. Comparison of BMD precision for Prodigy and Delphi spine and femur scans. Osteoporos Int 2006; 17:1303-8. [PMID: 16823544 DOI: 10.1007/s00198-006-0127-9] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2006] [Accepted: 03/13/2006] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Precision error in bone mineral density (BMD) measurement can be affected by patient positioning, variations in scan analysis, automation of software, and both short- and long-term fluctuations of the densitometry equipment. Minimization and characterization of these errors is essential for reliable assessment of BMD change over time. METHODS We compared the short-term precision error of two dual-energy X-ray absorptiometry (DXA) devices: the Lunar Prodigy (GE Healthcare) and the Delphi (Hologic). Both are fan-beam DXA devices predominantly used to measure BMD of the spine and proximal femur. In this study, 87 women (mean age 61.6+/-8.9 years) were measured in duplicate, with repositioning, on both systems, at one of three clinical centers. The technologists were International Society for Clinical Densitometry (ISCD) certified and followed manufacturer-recommended procedures. All scans were acquired using 30-s scan modes. Precision error was calculated as the root-mean-square standard deviation (RMS-SD) and coefficient of variation (RMS-%CV) for the repeated measurements. Right and left femora were evaluated individually and as a combined dual femur precision. Precision error of Prodigy and Delphi measurements at each measurement region was compared using an F test to determine significance of any observed differences. RESULTS While precision errors for both systems were low, Prodigy precision errors were significantly lower than Delphi at L1-L4 spine (1.0% vs 1.2%), total femur (0.9% vs 1.3%), femoral neck (1.5% vs 1.9%), and dual total femur (0.6% vs 0.9%). Dual femur modes decreased precision errors by approximately 25% compared with single femur results. CONCLUSIONS This study suggests that short-term BMD precision errors are skeletal-site and manufacturer specific. In clinical practice, precision should be considered when determining: (a) the minimum time interval between baseline and follow-up scans and (b) whether a statistically significant change in the patient's BMD has occurred.
Collapse
|
104
|
Li XY, Liu B, Fan B, Yu M, Zhu MJ, Xiong TA, Li K. Mapping, Tissue Distribution and Polymorphism Study of the Porcine SOCS2 and SOCS3 Genes. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2005. [DOI: 10.5713/ajas.2006.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
105
|
Li CC, Li K, Li J, Mo DL, Xu RF, Chen GH, Qiangba YZ, Ji SL, Tang XH, Fan B, Zhu MJ, Xiong TA, Guan X, Liu B. Polymorphism of Ghrelin Gene in Twelve Chinese Indigenous Chicken Breeds and Its Relationship with Chicken Growth Traits. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2005. [DOI: 10.5713/ajas.2006.153] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
106
|
Fan B, Chen YZ, Moran C, Zhao SH, Liu B, Yu M, Zhu MJ, Xiong TA, Li K. Individual-breed Assignment Analysis in Swine Populations by Using Microsatellite Markers. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2005. [DOI: 10.5713/ajas.2005.1529] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
107
|
Yang J, Yu M, Liu B, Fan B, Zhu M, Xiong T, Li K. Cloning and Initial Analysis of Porcine MPDU1 Gene. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2005. [DOI: 10.5713/ajas.2005.1237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
108
|
Wang YF, Yang J, Yu M, Liu B, Fan B, Zhu MJ, Xiong TA, Li K. Polymorphism detection of porcine PSMC3, PSMC6 and PSMD3 genes and their association with partial growth, carcass traits, meat quality and immune traits. CANADIAN JOURNAL OF ANIMAL SCIENCE 2005. [DOI: 10.4141/a04-064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PSMC3, PSMC6 and PSMD3 genes encode the proteasome 26S ATPase subunit 3, subunit 6 and the non-ATPase subunit 3, respectively, and exert the function in antigen processing and presentation. So these three genes were considered as the candidate genes that have the effect on porcine production and immune traits in this study. Genetic variations of these three genes were investigated and the single nucleotide polymorphism-based (SNPs-based) association analyses were studied initially. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) revealed that there is a MvaI polymorphic site in intron3 of PSMC3 gene and a MboI polymorphic site within intron 5 of PSMC6 gene, as well as a RsaI polymorphic site within exon 10 of the PSMD3 gene. χ2 analysis presented that allele frequencies differed among four breeds (Meishan, Erhualian, Qingping pig and Duroc) at PSMC3 and PSMD3 loci (P < 0.01). Association analysis showed that the PSMC3 gene has an effect on average backfat thickness (P < 0.01), total erythrocytes (P < 0.01) and hematocrit (P < 0.01), and there is a significant association between the PSMD3 genotypes and the mean corpuscular volume. PSMC6 has no effect on the production and immune traits we studied. Key words: Porcine, PSMC3, PSMC6, PSMD3, polymorphism, association analysis
Collapse
|
109
|
Xu RF, Li K, Chen GH, Qiang BYZ, Mo DL, Fan B, Li CC, Yu M, Zhu MJ, Xiong TA, Liu B. Investigation of PCR-RFLPs within Major Histocompatibility Complex B-G Genes Using Two Restriction Enzymes in Eight Breeds of Chinese Indigenous Chickens. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2005. [DOI: 10.5713/ajas.2005.942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
110
|
Peng Y, Li K, Yu M, Fan B, Yerle M, Liu B. Assignment porcine PCK1 and PCK2 genes to SSC17 and SSC7, respectively, by radiation hybrid mapping. Anim Genet 2005; 36:364-5. [PMID: 16026357 DOI: 10.1111/j.1365-2052.2005.01324.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
111
|
Abstract
Transmissible spongiform encephalopathy (TSE) is a neurodegenerative disorder in humans and animals. Polymorphisms and mutations in the prion protein (PRNP) gene have been associated with the incidence of natural and experimental TSE and the incubation period length. In this study, we determined PRNP polymorphisms in Chinese ovine, caprine and bovine breeds using 400 samples from 13 ovine and caprine breeds and 250 samples from nine bovine breeds. In the ovine and caprine PRNP gene, we found five previously unreported amino acid polymorphisms and two silent nucleotide alterations. In bovine PRNP, we found eight previously unreported amino acid polymorphisms and six silent nucleotide alterations.
Collapse
|
112
|
Lin L, Li K, Yu M, Fan B, Yerle M, Liu B. Isolation, polymorphism studies and radiation hybrid mapping of the porcine homologue of human membrane-associated protein ( CT120) gene. Anim Genet 2005; 36:73-4. [PMID: 15670136 DOI: 10.1111/j.1365-2052.2004.01216.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
113
|
Wang YF, Yu M, te Pas MFW, Yerle M, Liu B, Fan B, Xiong TA, Li K. Sequence characterization, polymorphism and chromosomal localizations of the porcine PSME1 and PSME2 genes. Anim Genet 2004; 35:361-6. [PMID: 15373739 DOI: 10.1111/j.1365-2052.2004.01176.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The full-length cDNA of porcine genes (PSME1 and PSME2) encoding proteasome activators PA28alpha- and beta-subunits were obtained by the rapid amplification of cDNA ends (RACE). The nucleotide sequences and the predicted protein sequences share high sequence identity with their mammalian counterparts. The reverse transcriptase-polymerase chain reaction (RT-PCR) revealed that porcine PSME1 and PSME2 genes are expressed in all eight tissues studied (liver, spleen, bladder, small intestine, kidney, heart, skeletal muscle and lung). The full-length genomic DNA of the porcine PSME1 and PSME2 genes were amplified by PCR. These two genes shared the same structure and were similar in size. A C/T single nucleotide polymorphism in PSME1 intron 8 detected as an SphI PCR-restriction fragment length polymorphism (PCR-RFLP) shows allele frequency differences between Meishan, Tibetan, Large White, Qingping, and Duroc pigs. The association analysis using two experimental GY selection lines selected for growth rate or leanness suggested that the PSME1 genotype was associated with weaning weight. Analyses of somatic cell hybrid (SCHP) and radiation hybrid (IMpRH) panels revealed that both genes map to SSC7q15.3-q21 and closely linked to the T-cell receptor alpha (TCRA) gene.
Collapse
|
114
|
Wu X, Yu M, Liu B, Yerle M, Zhao SH, Wang YF, Fan B, Li K. Mapping of three porcine 20S proteasome genes using the IMpRH panel. Cytogenet Genome Res 2004; 106:142. [PMID: 15222312 DOI: 10.1159/000078566] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
115
|
Yang J, Yu M, Liu B, Yerle M, Fan B, Zhu M, Zhu Z, Li K. Assignment of the porcine PLD2 gene to chromosome 12 and characterization of a SINE indel polymorphism. Anim Genet 2004; 35:352-3. [PMID: 15265082 DOI: 10.1111/j.1365-2052.2004.01149.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
116
|
Li SJ, Yang SL, Yang SH, Zhao SH, Fan B, Yu M, Wang HS, Li MH, Liu B, Xiong TA, Li K. Genetic diversity analyses of 10 indigenous Chinese pig populations based on 20 microsatellites. J Anim Sci 2004; 82:368-74. [PMID: 14974533 DOI: 10.2527/2004.822368x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
To study the genetic diversity of Chinese indigenous pig breeds, a total of 403 pigs from 10 local populations and 1 exotic Duroc breed were genotyped for 20 microsatellite markers. Heterozygosity and Wright's F-statistics (F(IS), F(ST), and F(IT)) were calculated to determine the genetic variation in those populations. The observed heterozygosities were in the range of 0.31 (Duroc) to 0.66 (Shengxian). The F(IS) value was in a range of -0.07 to 0.48. The mean F(ST) showed that approximately 78% of the genetic variation was within-population and 22% was across the populations. The 10 Chinese local breeds were classified into two major groups according to the phylogenetic tree, which was based on standard genetic distance. Four pig populations, Jianli, Ganxi Two Ends Black, Shaziling, and Dongshan were grouped into one branch. Before the study, these four populations were all classified as Central China Two Ends Black according to coat color, shape of the head, and shape of the ear. The Jinhua pig, which also has the two-ends-black coat color, was also grouped to the same branch but was not traditionally classified into this type. The five populations were located in various provinces in central China. The other five populations, Nanyang Black, Hainan Spotted, Huainan Black, Jiaxing Black, and Shengxian Spotted (black body, white feet), were grouped into another branch. The two groups of pig breeds had the same F(ST) value (0.14) when calculated separately. This value was similar to that of Iberian pigs (0.13) but smaller than that of the European pigs (0.27) as reported by other researchers. Our study showed that large genetic differentiation exists in Chinese pig breeds. The grouping of the five two-ends-black populations into one branch of the phylogenetic tree may indicate that the number of conservation farms can be decreased for this type of pig.
Collapse
|
117
|
Wang H, Yu M, Liu B, Yerle M, Wang Y, Fan B, Zhu Z, Zhu M, Li K. Mapping of the porcine JAK2, JAK3 and TYK2 genes using somatic cell and radiation hybrid panels. Anim Genet 2004; 35:258-9. [PMID: 15147409 DOI: 10.1111/j.1365-2052.2004.01128.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
118
|
Bissonnette RP, Tooker P, Hermann T, Fan B, Roegner K, Yen WC, Negro-Vilar A, Lamph WW. The combination of a Retinoid X Receptor (RXR) agonist LGD1069 (bexarotene) and vinorelbine produce synergistic growth inhibitory activity in non-small-cell lung cancer (NSCLC) cell lines. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.7358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
119
|
Fan B, Negro-Vilar A, Lamph WW, Bissonnette RP. A retinoid X receptor (RXR)-selective agonist bexarotene produces synergistic growth inhibitory activity with gefitinib in non-small-cell lung cancer (NSCLC) cell lines. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.7157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
120
|
Yang J, Li K, Liu B, Yerle M, Fan B, Xiong T, Yu M. Assignments of GRB7, GCN5L2, COL1A1 and TBCD to pig chromosome 12 by radiation hybrid mapping. Cytogenet Genome Res 2004; 103:204L. [PMID: 15008153 DOI: 10.1159/000076312] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
121
|
Sy SMH, Wong N, Lee TW, Tse G, Mok TSK, Fan B, Pang E, Johnson PJ, Yim A. Distinct patterns of genetic alterations in adenocarcinoma and squamous cell carcinoma of the lung. Eur J Cancer 2004; 40:1082-94. [PMID: 15093586 DOI: 10.1016/j.ejca.2004.01.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2003] [Revised: 01/12/2004] [Accepted: 01/15/2004] [Indexed: 01/03/2023]
Abstract
Squamous cell carcinoma (SqC) and adenocarcinoma (AdC) are the two most common subtypes of non-small cell lung cancer (NSCLC). Cumulative information suggests that the SqC and AdC subtypes progress through different carcinogenic pathways, but the genetic aberrations promoting such differences remain unclear. Here we have assessed the overall genomic imbalances and structural abnormalities in SqC and AdC. By parallel analyses with comparative genomic hybridisation (CGH) on tumorous lung tissues and spectral karyotyping (SKY) on short-term cultured primary tumours, genome-wide characterisation was carried out on 69 NSCLC (35 SqC, 34 AdC). Molecular cytogenetic characterisation indicated common and distinct genetic changes in SqC and AdC. Common events of +1q21-q24, +5p15-p14, and +8q22-q24.1, and -17p13-p12 were found in both groups, although hierarchical clustering simulation on CGH findings depicted +2p13-p11.2, +3q25-q29, +9q13-q34, +12p, +12q12-q15 and +17q21, and -8p in preferential association with SqC pathogenesis (P<0.05). Corresponding SKY analysis suggested that these changes occur in simple and complex rearrangements, and further indicated the clonal presence of translocation partners leading to chromosomal over-representations. These recurring rearrangements involved chromosome pairs of t(1;13), t(1;15), t(7;8), t(8;15), t(8;9), t(2;17) and t(15;20). Of particular interest was the finding that the t(8;12) translocation partner was exclusive to AdC. The combined application of SKY and CGH has thus uncovered the genome-wide chromosomal aberrations in NSCLC. Specific chromosomal imbalances and translocation partners found in SqC and AdC have highlighted regions for further molecular investigation into gene(s) that may hold importance in the carcinogenesis of NSCLC.
Collapse
|
122
|
Yu M, Wang Y, Te Pas MFW, Yerle M, Liu B, Fan B, Xiong T, Li K. Investigation of the porcine PA28 activator gamma-subunit (PSME3) gene: isolation, polymorphism and its chromosomal localization. J Anim Breed Genet 2004. [DOI: 10.1111/j.1439-0388.2004.00448.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
123
|
Song YL, Bian Z, Fan B, Fan MW, Gutmann JL, Peng B. A comparison of instrument-centering ability within the root canal for three contemporary instrumentation techniques. Int Endod J 2004; 37:265-71. [PMID: 15056353 DOI: 10.1111/j.0143-2885.2004.00798.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIM To study and compare Great Taper (GT) hand files using a reversed balanced force technique, nickel-titanium (NiTi)flex files with a balanced force technique and stainless steel (SS) K-type files using a step-back technique. METHODOLOGY Forty-eight extracted mandibular premolar teeth with single root canals having curvatures between 15 and 45 degrees were prepared using a modified Bramante model and randomly divided into three groups. The teeth were cross-sectioned at 2, 6 and 10 mm from the working length. Preoperative images of canals at three levels were captured at 20x magnification using a stereomicroscope. Canals in each group were, respectively, prepared to an apical size.10 GT file with 0.2 mm tip diameter, size 30 NiTiflex file and size 30 SS K-file. The GT file was used in a reversed balanced force technique, the NiTiflex file was used in a balanced force technique, and the SS K-file was used in a step-back technique. Postoperative canals were imaged under the conditions same as those for the preoperative canals. The postoperative images were superimposed over the preoperative images using software photoshop 6.0. The ability to maintain the instrument in the central axis of the canal and the deviation from the central canal axis were determined and compared by statistical analysis, along with the assessment of the amount of dentine removed. RESULTS At apical level, the centering ratio, the distance of transportation and the dentine removed in GT and NiTiflex groups were significantly less than those in SS group (P < 0.01), but no statistical differences were found between the two NiTi groups. At other levels, there were no substantial differences amongst the groups. CONCLUSIONS Compared with SS K-files, GT hand files and NiTiflex files remain better centered and produce significantly less transportation in curved canals.
Collapse
|
124
|
Lin L, Liu B, Yu M, Yerle M, Fan B, Yang J, Li K. Radiation hybrid mapping of the pig ALDOA, ALDOB and ALDOC genes to SSC3, SSC1 and SSC12. Anim Genet 2004; 35:66-7. [PMID: 14731234 DOI: 10.1111/j.1365-2052.2003.01072.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
125
|
Li B, Zhang S, Jiang J, Fan B, Zhang F. Improving low-temperature performance of infrared thin-film interference filters utilizing the intrinsic properties of IV-VI narrow-gap semiconductors. OPTICS EXPRESS 2004; 12:401-404. [PMID: 19474836 DOI: 10.1364/opex.12.000401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Pb(1) (-x)Ge(x)Te is a pseudobinary alloy of IV-VI narrow-gap semiconductor, of which maximum refractive index corresponds to the ferroelectric phase transition. Since the temperature coefficient of refractive index can be tunable from negative to positive by changing the Ge composition, it is possible to utilize the intrinsic property in the fabrication of infrared thin-film interference filters. In this letter, we report a narrow-bandpass filter, in which Pb(0.94)Ge(0.06)Te was substituted for PbTe. It found that the low-temperature stability of the filter is obviously improved: in the temperature range of 80-300K, the shift of center wavelength with temperature is reduced from 0.48nm.K(-1) to 0.23nm K(-1); furthermore, the peak transmittance of filter fabricated with Pb(0.94)Ge(0.06)Te is ~3% over that fabricated with PbTe.
Collapse
|