Untitled

Рау, Э. И.; Gostev, A. V.; Zhu, Shuang; Phang, D.; Chan, D.S.H.; Thong, John T. L.; Wong, W.C.

doi:10.1023/a:1011336726819

Cited by 9 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The second factor is the influence of the second and backscattered electrons on the detected signal. In our work the factor is ruled out by changing the pulse mode unequally [11].…”

Section: The Novel Methods For Determining L S and τ In Sebiv Modementioning

confidence: 99%

See 1 more Smart Citation

A novel method of determining semiconductor parameters in EBIC and SEBIV modes of SEM

Zhu

Рау

Yang

2003

Semicond. Sci. Technol.

View full text Add to dashboard Cite

We present a novel method for determining semiconductor parameters such as diffusion length L, lifetime τ and surface recombination velocity S of minority carriers by employing scanning electron microscopy (SEM). This new method is applicable to both electron beam induced current (EBIC) and surface electron beam induced voltage (SEBIV) modes in SEM. The quantitative descriptions for EBIC and SEBIV signals are derived. The parameters L, S and τ can be directly extracted from the expressions for EBIC or SEBIV signals and their relaxation characteristics in experiment. As an example, the values of L, S and τ for n-p junction and p-Si crystal are determined by using the novel method in EBIC or SEBIV mode. The carrier diffusion length of a p-Si crystal is determined to be 8.74 µm in SEBIV mode. It is very close to the normal diffusion length of 7.41 µm of this sample. The novel method is proved to be very helpful for the quantitative characterization of semiconductor materials and devices. Especially, the SEBIV mode in SEM shows great potential for investigating semiconductor structures nondestructively.

show abstract

“…The second factor is the influence of the second and backscattered electrons on the detected signal. In our work the factor is ruled out by changing the pulse mode unequally [11].…”

Section: The Novel Methods For Determining L S and τ In Sebiv Modementioning

confidence: 99%

“…The time decay of SEBIV signal in the first approximation can be described as the following formulae without considering surface recombination or when S = 0 [11]:…”

Section: The Novel Methods For Determining L S and τ In Sebiv Modementioning

confidence: 99%

A novel method of determining semiconductor parameters in EBIC and SEBIV modes of SEM

Zhu

Рау

Yang

2003

Semicond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Testicular specimens were fixed in 4% phosphate buffered glutaraldehyde (0.1 M, pH 7.4), then in phosphate-buffered 1% osmium tetroxide, dehydrated in graded alcohol, placed into amyl acetate, dried with liquid CO 2 under pressure with critical point dryer (E 3000) and coated with gold particles (Rau et al, 2001) The samples were examined under Jeol JSM-5200LV scanning electron microscope at the Electron Microscopic Unit, Faculty of Medicine, Tanta University, Egypt.…”

Section: Scanning Electron Microscopic Examinationmentioning

confidence: 99%

Melatonin epigenetic potential on testicular functions and fertility profile in varicocele rat model is mediated by silent information regulator 1

Gheit

Soliman

Nagla

et al. 2022

British J Pharmacology

View full text Add to dashboard Cite

Background and Purpose Varicocele is a leading cause of male infertility. Melatonin is a highly pleiotropic neurohormone. We aimed to characterize the melatonin epigenetic potential in varicocele and the involved molecular mechanisms. Experimental Approach Fifty‐two male albino rats were randomly divided into four groups (13 rats each): control (I), melatonin (II), varicocele (III) and melatonin treated varicocele (IV) groups. Left varicocele was induced by partial left renal vein ligation. Reproductive hormones, epididymal sperm functional parameters, testicular 3/17 β‐hydroxysteroid dehydrogenases, antioxidant enzymes, malondialdehyde, nicotinamide adenine dinucleotide phosphate oxidase, 8‐hydroxy‐2′‐deoxyguanosine and histopathological/Johnsen's score were evaluated. Flow cytometry and Comet were carried out to explore extent of sperm and testicular DNA damage. Testicular expression of silent information regulator 1 (SIRT1), forkhead transcription factors‐class O (type1) (FOXO1), tumour suppressor gene, P53, cation channels of sperm (CatSper) and steroidogenic acute regulatory protein was evaluated by western blot technique. Testicular expression of Bcl‐2 and its associated X protein and nuclear factor kappa‐light‐chain‐enhancer of activated B cells were assayed by immunohistochemical staining. Testicular miR‐34a expression was quantified by quantitative reverse transcription‐polymerase chain reaction. Key Results The varicocele induced testicular histological injury, enhanced oxidative stress, P53‐mediated apoptosis, DNA damage and increased testicular miR‐34a expression paralleled with down‐regulated SIRT1/FOXO axis. Melatonin treatment of varicocele rats displayed antioxidant/anti‐apoptotic efficacy and improved reproductive hormones axis, CatSper expression and fertility parameters. MiR‐34a/SIRT1/FOXO1 epigenetic axis integrates testicular melatonin mediated intracellular transduction cascades in varicocele. Conclusion and Implications Melatonin can be used as an adjuvant therapy to improve varicocele and its complication.

show abstract

“…Then the specimens were dehydrated in serial dilutions of ethanol and placed into amyl acetate. The samples were then dried with liquid CO 2 and coated with gold particles [26]. The tongue sample mounting was performed on aluminum stubs and scanning examination was done under scanning electron microscopic examination (JEOL JSM-6510 LV electron microscope; Jeol Ltd, Tokyo, Japan; Faculty of Agriculture, Electron Microscope Research Unit, Al-Mansoura University, Egypt).…”

Section: Scanning Electron Microscopic Examinationmentioning

confidence: 99%

Morphological, ultrastructural, and biochemical changes induced by sodium fluoride in the tongue of adult male albino rat and the ameliorative effect of resveratrol

2022

View full text Add to dashboard Cite

Little knowledge is available about the effects of fluoride exposure on the tongue. This study evaluated the effects of sodium fluoride (NaF) on the tongue ultrastructure and detected the ameliorative effects of resveratrol. Forty adult albino rats were separated into 4 groups: the control group was given a balanced diet and purified water. The NaF treated group: received 10 mg/kg/d dissolved in 2.5 ml distilled water once daily for 30 days orally. The NaF+resveratrol group: received NaF 10 mg/ kg/d orally together with resveratrol in a dose of 30 mg/kg daily for 30 days. The resveratrol group was subjected to resveratrol in a dose of 30 mg/kg/d by oral gavage for 30 days. Sections were stained with hematoxylin & eosin, and Masson's trichrome. Tumor necrosis factor α immunohistochemical study and electron microscopic examinations were done. The oxidative stress markers malondialdehyde, antioxidant reduced glutathione, and the total antioxidant capacity were measured. The NaF group revealed ulceration, necrotic muscle fibers, distorted papillae and a significant increase in malondialdehyde level, and a significant decrease in glutathione and the total antioxidant levels. In the NaF+resveratrol group, pathological changes were less, and the oxidant levels were decreased by the administration of resveratrol with NaF. In conclusion, NaF adversely affects the ultrastructure of the adult rat tongue and resveratrol can ameliorate this effect.

show abstract

Untitled

Cited by 9 publications

References 11 publications

A novel method of determining semiconductor parameters in EBIC and SEBIV modes of SEM

A novel method of determining semiconductor parameters in EBIC and SEBIV modes of SEM

Melatonin epigenetic potential on testicular functions and fertility profile in varicocele rat model is mediated by silent information regulator 1

Morphological, ultrastructural, and biochemical changes induced by sodium fluoride in the tongue of adult male albino rat and the ameliorative effect of resveratrol

Contact Info

Product

Resources

About