Structural defects

Evaluate the treatment results of soft-tissue defects in the wrist-hand region by radial artery perforator flaps. Subjects and methods: A prospective, non-controlled study and cross-sectional description of 10 patients with soft-tissue defects in the wrist-hand region due to burns, indicated for reconstructive treatment using radial artery perforator flaps at the Center for Plastic and Aesthetic Surgery, Le Huu Trac National Burn Hospital, from January to September, 2021.

4p vipanly 28-10-2024 0 0   Download

Investigating the occurrence of defects in structures is currently a major issue of significant interest. In this paper, we present experimental research findings on the relationship between the moments of the power spectrum and the presence of damage in bridge beam structures.

13p vibecca 01-10-2024 2 1   Download

Bài viết "Đề xuất một mô hình ăng-ten MIMO mạch dải phân cực tròn có hệ số cách ly cao" trình bày một mô hình ăngten nhiều đầu vào nhiều đầu ra (Multiple-input Multipleoutput - MIMO) có phân cực tròn (circular polarization - CP) và cách ly cao giữa các cổng cấp nguồn. Trong đó, các tác giả đề xuất một cấu trúc mặt đất không hoàn hảo mới (Defected Ground Structure - DGS) để giảm tương hỗ và cho phép ăng-ten MIMO đạt được độ cách ly cao trong miền tần số công tác.

5p phocuuvan0201 02-02-2024 10 4   Download

Trong bài viết này, một anten ba băng được đề xuất dựa trên cấu trúc anten phẳng nhằm đơn giản về chế tạo và dễ dàng tích hợp trong các mạch thu phát. Anten sử dụng cấu trúc mặt phẳng đất khuyết DGS (Defected Ground Structure) để chủ động tối ưu từng tần số cộng hưởng.

5p vishekhar 25-10-2023 14 6   Download

Bài viết Nâng cao độ cách ly cho anten MIMO hai băng, băng tần milimet sử dụng vật liệu có cấu trúc DGS/SMLR đề xuất giải pháp sử dụng cấu trúc kết hợp DGS/ SMLR (Defected Ground Structure/ Slotted Mender Line Resonator) cho hiệu quả giảm sâu tương hỗ đồng thời trên cả hai trên băng tần rộng với khoảng cách giữa hai băng tần lớn: 28GHz và 60GHz của anten MIMO băng tần milimet.

6p viannee 02-08-2023 11 5   Download

In particular, the system undergoes three stages. At first stage the relaxation proceeds slowly so that the energy of system slightly decreases and the samples structure remains amorphous. Within second stage a structural transformation occurs which significantly changes PRDF and DCN for the relatively short time. The energy of the system is dropped considerably and the amorphous structure transforms into the crystalline. Finally, the crystalline sample undergoes the slow relaxation which reduces the energy of system and eliminates structural defects in crystal lattices.

17p runordie3 27-06-2022 18 3   Download

Bài báo này đề xuất thiết kế anten mảng tái cấu hình tần số với kích thước tại những tần số trung tâm 7.5 Ghz và 9 GHz sử dụng cấu trúc Defected Ground Structure (DGS) và chuyển mạch bằng cách sử dụng pin diode. Anten mảng gồm 4 phần tử (2x2) được chế tạo sử dụng lớp điện môi FR4 với các tham số: hằng số điện môi εr = 4.4, chiều dày lớp điện môi hsub = 1.575 mm, suy hao tanδ = 0.02. Mời các bạn cùng tham khảo!

5p wangziyi_1307 26-04-2022 22 4   Download

Trong bài báo này, một cấu trúc dải chắn điện từ phức hợp mới được đề xuất. Kết hợp giữa cấu trúc dải chắn điện từ EBG (Electromagnetic Band Gap) hình răng lược và cấu trúc mặt phẳng đất khuyết DGS (Defected Ground Structure) hình phức hợp, cấu trúc đề xuất đã giảm được 52% kích thước so với EBG hình nấm truyền thống. Phân tích trên đồ thị tán sắc, cấu trúc này cho hai dải chắn tại hai băng tần 2.75 GHz-3.84 GHz và 4.3 GHz7.3 GHz, có thể ứng dụng cho việc cải thiện các đặc tính của anten trên băng tần 3.5 GHz và 5 GHz của truyền thông vô tuyến thế hệ thứ 5 (5G) băng tần dưới 6GHz.

5p wangziyi_1307 26-04-2022 39 4   Download

In this work, we investigate the defect structure of silicene with a vancacy and the adsorption mechanism of isopropanol on the surface of defected silicene by employing the Density Functional Theory method.

8p tamynhan6 14-09-2020 15 2   Download

A conventional structure during bearing loads usually has cross-sectional areasoften changed, not always constant because of defectiveness or corrosiveness…Moreover, in the process of working, the loads acting on structures themselves change. Therefore, this paper offers solutions of a truss mentioned the change of cross-sectional areas and loads are modeled as two types of random variables.

6p blackwidow123 15-06-2018 31 2   Download

The physiological role of sulfoquinovosyl diacylglycerol (SQDG) in photosynthesis was investigated with a SQDG defective mutant (hf-2) of Chlamydomonas reinhardtii that did not have any detectable amount of SQDG. The mutant showed a lower rate of photosystem II (PSII) activity by  40% and also a lower growth rate than those of the wildtype. Results of genetical analysis of hf-2 strongly suggest that the SQDG defect and the lowered PSII activity are due to a single gene mutation.

6p research12 01-06-2013 37 6   Download

In the accompanying paper [Adams, H., Scotti, P.A., de Cock, H., Luirink, J. & Tommassen, J. (2002)Eur. J. Bio-chem.269, 5564–5571.], we showed that the precursor of outer-membrane proteinPhoEofEscherichia coliwithaGly to Leu substitution at position )10 in the signal sequence (G-10L) is targeted to the SecYEGtranslocon via the signal-recognition particle (SRP) route, instead of via the SecB pathway. Here, we studied the fate of the mutant precursor in aprlA4mutant strain.

9p tumor12 22-04-2013 38 3   Download

Sec14p of the yeastSaccharomyces cerevisiaeis involved in protein secretion and regulation of lipid synthesis and turnover in vivo, but acts as a phosphatidylinositol–phos-phatidylcholine transfer proteinin vitro. In this work, the five homologues of Sec14p, Sfh1p–Sfh5p, were subjected to biochemical andcell biological analysis toget abetter viewof their physiological role. We show that overexpression of SFH2andSFH4suppressed thesec14growth defect in a more andSFH1in a less efficient way, whereas overexpres-sion ofSFH3andSFH5did not complementsec14....

13p fptmusic 16-04-2013 41 5   Download

Alterations in mitochondrial activity resulting from defects in mitochond-rial DNA (mtDNA) can modulate the biogenesis of mitochondria by mech-anisms that are still poorly understood. In order to study mitochondrial biogenesis in cells with impaired mitochondrial activity, we used rho-L929 and rho 0 143 B cells (partially and totally depleted of mtDNA, respectively),

25p fptmusic 12-04-2013 56 4   Download

Sixgenes are homologs ofDrosophila sine oculisand encode transcription factors that are characterized by a conserved Six domain and homeo-domain. Of the six family members (Six1–Six6) in mice, Six1and Six4 show similar expression patterns during embryogenesis. Six1 –⁄ – mice show defective formation of various organs such as inner ear, nose, skeletal mus-cle, kidney and thymus, whereasSix4 –⁄ – mice show little anomaly in organo-genesis.

16p awards 06-04-2013 29 2   Download

The tissue-specific transcription factorsHNF1aandHNF1b are closely related homeodomain proteins conserved in vertebrate evolution. Heterozygous mutations in human HNF1b 1 but not inHNF1agenes are associated with kidney malformations. Overexpression of HNF1b in Xenopus embryos leads to defective pronephros development, while HNF1ahas no effect. We have defined the regions respon-sible for this functional difference between HNF1band HNF1ain transfected HeLa cells as well as in injected Xenopusembryos. ...

14p awards 05-04-2013 44 3   Download

Information on the regulation and structure–function rela-tion of enzymes involved in DNA precursor synthesis is pivotal, as defects in several of these enzymes have been found to cause depletion or deletion of mitochondrial DNA resulting in severediseases.Here, the effect of aminoacid106 on the enzymatic properties of the cell-cycle-regulated human cytosolic thymidine kinase 1(TK1) is investigated.

9p dell39 03-04-2013 50 4   Download

Mitochondrial fatty acid oxidation deficiencies are due to genetic defects in enzymes of fatty acidb-oxidation and transport proteins.Genetic defects have been identified in most of the genes where nearly all types of sequence vari-ations (mutation types) have beenassociatedwithdisease.In this paper, we will discuss the effects of the various types of sequence variations encountered and review current know-ledge regarding the genotype–phenotype relationship, espe-cially in patients with acyl-CoA dehydrogenase deficiencies where sufficient material exists for a meaningful discussion....

13p dell39 03-04-2013 49 3   Download

Hepatic insulin resistance in the leptin-receptor defective Zucker fa⁄fa rat is associated with impaired glycogen synthesis and increased activity of phosphorylase-a. We investigated the coupling between phosphorylase-a and glycogen synthesis in hepatocytes from fa⁄fa rats by modulating the concentration of phosphorylase-a.

11p inspiron33 26-03-2013 42 4   Download

Leukocyte adhesion deficiency II (LAD II) belongs to a group of human congenital diseases in which the interactions of leukocytes with the vascular endothelium are strongly impaired. LAD II is based on a defect in the syn-thesis of fucosylated glycostructures. This leads to an immunodeficiency owing to the absence of functional selectin ligands and to strong psycho-motor defects, as a result of as-yet unknown reasons.

9p inspiron33 25-03-2013 33 4   Download