Wild-type mice were used as controls Macrophage targeting by Au-

Wild-type mice were used as controls. Macrophage targeting by Au-HDL was further evaluated by using transmission electron microscopy and confocal microscopy of aorta sections.

Results: Multicolor CT enabled differentiation of Au-HDL, iodine-based Fosbretabulin supplier contrast material, and calcium phosphate in the phantoms. Accumulations of Au-HDL were detected in the aortas of the apo E-KO mice, while the iodine-based

contrast agent and the calcium-rich tissue could also be detected and thus facilitated visualization of the vasculature and bones (skeleton), respectively, during a single scanning examination. Microscopy revealed Au-HDL to be primarily localized in the macrophages on the aorta sections; hence, the multicolor CT images provided information about the macrophage burden.

Conclusion: Spectral CT used with carefully chosen contrast agents may yield valuable information about atherosclerotic plaque composition.”
“CYP2D6 is part of the cytochrome P450 system, which catalyzes biotransformation of endogenous substrates and xenobiotics. Approximately 10% of the Caucasian population has two null alleles, resulting in a poor metabolizer (PM) status. Mostly, allele four (CYP2D6*4) is responsible for the PM status,

which is suspected to be associated with an accelerated fibrosis progression (FP). The aim of the present study was to analyze the role of the CYP2D6*4 genotype for FP after liver transplantation Compound C nmr (LT). Genotypes were determined in liver biopsies (donor) and peripheral blood (recipient) by fluorescence resonance energy transfer. Data were correlated with clinical variables and risk factors for fibrosis.

We analyzed 517 LTs performed between 1997 and 2009. Overall donor and recipient allele frequencies were comparable (18.0%, 20.5%; P = BMS-777607 datasheet 0.43). The donor genotype did not correlate with FP. In contrast, recipients carrying CYP2D6*4, showed a significant higher risk for an accelerated FP (P = 0.011) in HCV positive (P = 0.038) and HCV negative patients (P = 0.033). Results were confirmed by multivariate analysis (Hazard ratio 1.65; P = 0.001). The CYP2D6*4-associated PM status of the donor liver seems to have no influence on FP after LT. Recipients, carrying the allele, have an elevated risk for an accelerated FP.”
“This paper outlines a low-cost multimaterial, integrated passives approach involving suspension wicking of high-K dielectric and ferromagnetic nanoparticles into capillaries comprising inductor and capacitor passive devices. The suspension is deposited into a “”target well”" and nanoparticles are delivered to the passive via fluidic self-assembly, resulting in inductor and capacitor value improvements. The universality of this approach has been demonstrated through the fabrication and testing of both MEMS inductors and capacitors on a single substrate, which would otherwise be fabrication-intense using traditional fabrication methods.


“The aim of this study was to demonstrate an assessment of


“The aim of this study was to demonstrate an assessment of left internal mammary artery (LIMA) patency and anatomy by standard left ventriculography, and to define a proposal for predicting LIMA function according to left ventriculography outcome. A total of 335 patients with an indication of coronary angiography

were included. Standard coronary angiography and left ventriculography AZD8186 were performed initially. Visualization of LIMA occurred in the late phase of ventriculography and the LIMA visualization frame rate was counted for each patient. Then selective LIMA angiography was performed and LIMA diameter, LIMA course and anatomy, and subclavian artery anatomy were noted. Finally, the results of left ventriculography and LIMA angiography were compared by statistical analysis. During left ventriculography, LIMA was visualized in 96.4% of the patients. The mean LIMA visualization frame

rate was 53.8 +/- 17.7 and the mean LIMA diameter was 2.60 +/- 0.36 mm. There was a strong correlation between LIMA visualization frame rate and LIMA diameter, BYL719 supplier LIMA course, and also asymptomatic subclavian artery disease (P < 0.001). Regression analysis showed that LIMA visualization frame rate is the major independent determinant for LIMA diameter prediction (P < 0.001); LIMA diameter, LIMA course, proximal LIMA side branch, and subclavian artery disease are the major predictors of LIMA visualization on left ventriculography (P < 0.001). LIMA patency and anatomy can be evaluated accurately with a simple method using left ventriculography. Besides direct visualization of LIMA, the visualization frame rate may constitute a reliable parameter for assessing LIMA

function. A LIMA visualization frame rate of less than 50 is associated with a healthy and well-sized LIMA.”
“The production of L(+)-lactic acid (LA) by Rhizopus oryzae immobilized in polyvinyl alcohol (PVA) was investigated. To decrease diffusional resistance, we modified the PVA gel through the addition of sodium alginate and phosphate see more esterification. The production of L(+)-LA improved notably in the immobilized Rhizopus oryzae. Maximum L(+)-LA production (106.27 g/L), with a yield of 73.1 % and rate of 2.95 g/L center dot h, was obtained at a temperature of 38 A degrees C, 6 % PVA, and 0.8 % sodium alginate. The immobilized R. oryzae was stable in 14 serial-batch cultures using non-growth medium. The immobilized beads also displayed good tolerance to low temperature and long-term storage at 4 A degrees C with the preservation of biochemical properties.”
“Guidelines have not recommended routine echocardiography to predict perioperative cardiac events (PCE). We aimed to evaluate the prognostic significance of tissue Doppler echocardiography-derived E/E’ for risk stratification before noncardiac surgery. We reviewed 445 consecutive patients with cardiovascular diseases who had undergone tissue Doppler echocardiography before noncardiac surgery.

The surface characteristics of these polypropylene materials and

The surface characteristics of these polypropylene materials and the influence of HFPMA on the crystalline behavior were investigated by the X-ray photoelectron spectroscopy (XPS) and wide-angle X-ray diffraction (WAXD). The surface tension of the FPPs is found to be in the range of 28.8-22.9 mN/m while varying the fluorinated monomer contents, which was lower than that of the original PP (about 30 mN/m). The selleck chemicals llc barrier properties of these materials as the containers were studied by using blow-molded bottles made of FPP and PP. The results showed that enhanced permeation resistance for acetone and xylene solvents as well as better antiultraviolet transmittance properties were achieved in FPP

bottles. The acetone and xylene permeation ratio of the FPP bottles were about 1.62 and 1.28 times compared to that of PP bottles, respectively. In addition, the WAXD and DSC studies suggested that the grafting of the fluorinated methacrylate, HFPMA, onto the PP might

induce the formation of 13 form crystals, which is rarely PND-1186 cost found in the common PP materials. The percentage of 1 form crystals reached 33.6%, estimated by WAXD, in the FPP with 20% (by weight) of HFPMA. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 116: 2793-2801, 2010″
“Infertility is one of the most prevalent public health problems facing young adult males in today’s society. A clear, treatable cause of infertility cannot be determined in a large number of these patients, and a growing body of evidence suggests that infertility in many of these men may be due to genetic causes. Studies using mouse knockout technology have been integral for examination of normal spermatogenesis and to identify proteins essential for this process, which in turn are candidate genes for human male infertility. Successful spermatogenesis depends on a delicate balance of local signalling factors, and this review focuses on the genes that encode these factors.

Normal functioning of all testicular cell types is essential for fertility and might also be crucial to prevent germ cell oncogenesis. Analysis of these signalling processes in spermatogenesis using mouse click here models has provided investigators with an invaluable tool to effectively translate basic science research to the research of human disease and infertility.”
“Background/AimMalignant hyperthermia susceptible patients may experience a fatal reaction to volatile anesthetic gases. This study sought to determine the washout characteristics of desflurane, sevoflurane, and isoflurane from the Aisys((R)), Avance((R)), and Aestiva((R)) anesthesia machines. (GE Healthcare, Madison, WI, USA).

MethodsAll machines were inspected by a GE Healthcare engineer prior to testing. The machines were primed with desflurane 7 vol%, sevoflurane 2.5 vol%, and isoflurane 1.2 vol% on three separate occasions for 2h each with each gas.


“Purpose: Repair of nasal and auricular malformation remai


“Purpose: Repair of nasal and auricular malformation remains an obstacle for clinicians because of poor regenerative capacity of cartilage and limitation of donor sites. In the Current study, we developed a novel approach to regenerate implantable nasal alar cartilage by using marrow precursor cell (MPC) sheet and biodegradable Scaffold of polylactic acid-polyglycolic acid copolymer (PLGA).

Materials and Methods: Rabbit MPCs were expanded and induced by transforming growth fictor-beta PD-1/PD-L1 Inhibitor 3 purchase to improve chondrocyte phenotype. MPC sheets were obtained by continuous culture and used to wrap PLGA scaffold in the shape of the human nasal

alar. The constructs were incubated in a spinner flask for 4 weeks, and cartilage formation was investigated by gross inspection and histological examination. The constructs were then implanted subcutaneously into a nude mouse. Specimens were harvested and analyzed 4 weeks after implantation.

Results: The results showed that cartilaginous tissue formed and PLGA absorbed during in vitro incubation. Histological analysis showed engineered cartilage consisted of event, spaced lacunae embedded in a matrix rich in proteoglycans,

Bafilomycin A1 mouse and kept the initial shape of the nasal alar. Based on this “”MPC sheet combining polymer strategy,”" implantable nasal alar could be successfully regenerated.

Conclusion: This strategy has the advantage of high cell transplantation efficiency and great potential for clinical application. (C) 2009 American Association of Oral and Maxillofacial Surgeons”
“The radiation properties of nonpolar AlGaN quantum wells (QWs) were theoretically investigated by comparing them to those of c-plane AlGaN QWs with heavy holes as the top valence band (VB). First, the conditions to minimize the threshold carrier density of c-plane QW laser diodes were explored. A thin well

width (similar to 1 nm) and reduction of the Al content in the well layer were important to reduce threshold carrier IPI-145 mouse density because narrow wells suppressed the quantum confined Stark effect and AlGaN with a lower Al content had a lower density of states. Moreover, the emission wavelength was widely controlled by tuning the Al contents of both the well and barrier layers under the proposed conditions. Then the properties of nonpolar AlGaN QWs were investigated. Nonpolar AlGaN had several superior characteristics compared to c-plane QWs, including large overlap integrals, optical polarization suitable for both edge and surface emissions, an almost linearly polarized optical dipole between the conduction band and top VB due to the isolated VBs, and a reduced VB density of state. Finally, the threshold carrier densities of both nonpolar and optimized c-plane QWs were compared as functions of the transition wavelength. At a given wavelength, the threshold of nonpolar QWs was lower than that of c-plane ones.


“Objective:

In a single-center retrospective cohor


“Objective:

In a single-center retrospective cohort study, we investigated whether the frequency of clinic patient physician contact (PPC) correlates with quality of care and can predict outcome in peritoneal dialysis (PD) patients.

Patients and Methods: We enrolled 307 incident PD patients who started PD from July 2002 to February 2007. All patients who visited the clinic at least once every 6 months and who lived for at least 6 months were followed until death, transfer to hemodialysis, renal transplantation, or February 2008 ( censor date). Throughout the study period, an integrative follow-up strategy was used, including PPC and three other modes of contact between patients and non-physicians.

Patients’ PPC BB-94 in vivo frequency was divided into 3 categories: high frequency (monthly or more often), intermediate frequency (every 1-3 months), and low frequency (every 3-6 months). Baseline demographic and biochemical data were collected. Indices of diet, dialysis adequacy, biochemistry, and nutrition were measured at every visit and then calculated as mean values.

Results: We followed the 307 patients for a mean of 31.45 +/- 13.62 months Cyclosporin A (range: 12-64 months). By PPC frequency, 127 patients (41.3%) were in the high-frequency group; 136 (44.3%), in the intermediate-frequency group; and 44 (14.3%), in the low-frequency

group. We observed no difference of baseline demographic and biochemical data between the three groups (p > 0.05). Patients in the low-frequency group had lower mean hemoglobin and total urea clearance rates, but higher serum phosphate than did patients in the intermediate- or high-frequency groups (p < 0.05). Mean indices of nutrition, including serum albumin, daily protein and energy intake, and lean body mass were not different between the three groups (p > 0.05). Frequency of PPC did not show an effect on the survival of PD patients (p = 0.37 by Kaplan-Meier plot). Age (p = 0.002), Charlson comorbidity score (p = 0.001), and pre-dialysis albumin (p = 0.019) were independent negative risk SRT1720 cell line factors for death in multivariate Cox proportional hazard models, which were adjusted for sex, PPC frequency, baseline hemoglobin, and glomerular filtration rate.

Conclusions: Frequency of PPC did not predict outcome in PD patients after an integrative care strategy was implemented. Control of anemia and hyperphosphatemia needs to be strengthened in patients with a low frequency of PPC.”
“BACKGROUND: The byproducts from shrimp processing are heads and shells which contain a wealth of carbon and could be converted into oils via oleaginous microorganisms.

We secured consent from 565 children (from 5-13 years old) and th

We secured consent from 565 children (from 5-13 years old) and their parents/guardians and examined them at baseline and regular intervals over 48 months according to the International Caries Detection Assessment System (ICDAS), yearly radiographs, and QLF. QLF images from surfaces with ICDAS 0/1/2/3/4 at baseline that progressed (N = 2,191) to cavitation (ICDAS 5/6) or fillings and surfaces that did not progress

to cavitation/fillings (N = 4,141) were analyzed independently for A, F, and Q. Linear mixed-effects models were used to compare means and slopes (changes over time) between surfaces that progressed and those that did not. QLF A, F, and Q increased at a faster rate for surfaces that progressed than for surfaces that did not progress (p = .0001), regardless of type of surface or baseline ICDAS score. AUC for Selleckchem GDC 941 ICDAS ranged from 0.65 to ARN-509 in vitro 0.80, but adding QLF information improved AUC (0.82-0.87, p < .0005). We concluded that faster changes in QLF variables can indicate lesion progression toward cavitation and be more clinically relevant than actual QLF values.”
“Rotator cuff tendinitis is one of the main causes

of shoulder pain. The objective of this study was to evaluate the possible additive effects of low-power laser treatment in combination with conventional physiotherapy endeavors in these patients. A total of 50 patients who were referred to the Physical Medicine and Rehabilitation Clinic with shoulder pain and rotator cuff disorders were selected. Pain severity measured with visual analogue scale (VAS), abduction, and external rotation range of motion in shoulder joint

was measured by goniometry, and evaluation of daily functional abilities of patients was measured HM781-36B cost by shoulder disability questionnaire. Twenty-five of the above patients were randomly assigned into the control group and received only routine physiotherapy. The other 25 patients were assigned into the experimental group and received conventional therapy plus low-level laser therapy (4 J/cm(2) at each point over a maximum of ten painful points of shoulder region for total 5 min duration). The above measurements were assessed at the end of the third week of therapy in each group and the results were analyzed statistically. In both groups, statistically significant improvement was detected in all outcome measures compared to baseline (p < 0.05). Comparison between two different groups revealed better results for control of pain (reduction in VAS average) and shoulder disability problems in the experimental group versus the control (3.1 +/- 2.2 vs. 5 +/- 2.6, p = 0.029 and 4.4 +/- 3.1 vs. 8.5 +/- 5.1, p = 0.031, respectively ) after intervention. Positive objective signs also had better results in the experimental group, but the mean range of active abduction (144.92 +/- 31.6 vs. 132.80 +/- 31.3) and external rotation (78.0 +/- 19.5 vs.

Main problems were related to patient characteristics, staff, and

Main problems were related to patient characteristics, staff, and outcome measures. Participants expressed the need for more guidance and training in the use of PROMs.

Conclusions: Professionals need more support for the use and implementation of PROMs in clinical practice and research through training and guidance in order to improve patient care.”
“The objectives of this study were to develop morphine sulfate sustained-release tablet formulations and to evaluate the bioequivalence compared with YH25448 a commercial brand. The physicochemical properties of the formulated and commercial tablets were determined

and compared. The bioequivalence investigation was carried out in 15 healthy male volunteers who received a single dose in a randomized two-way crossover design. After dosing, serial blood samples were collected for a period of 24 h. Morphine concentration was assayed by high-performance liquid chromatography with electrochemical detector. The log-transformed C(max) and AUC(s) were statistically compared by analysis of variance, and the 90% confidence intervals (CIs) of the ratio of the log-transformed C(max) and AUC(s) between the most promising developed formulation and the commercial product were determined. It was found that the dissolution rate

profile of a developed formulation was similar to the commercial brand. Their similarity and difference factors were well within limits. In the bioequivalence study, the AUC(last) and AUC(inf) between the test selleck chemical and the reference products were not statistically different (p=0.227 and p=0.468, respectively), with the 90% CIs of 83.4-102.6% and 87.7-139.4%, respectively. However, the C(max) of the two formulations

was significantly different (p=0.019). The 90% CI of the developed formulation was 72.0-93.0% compared to the commercial product. In vitro dissolution of locally prepared morphine sulfate sustained-release tablets was comparable to commercial brand. However, the results justified the conclusion of lack of bioequivalence of the developed product to the commercial one.”
“To see the effect of conjugation on molecular weight and conductivity, Selleck Tyrosine Kinase Inhibitor Library three symmetrical polymethine dyes are added in polymers either before or after polymerization. Dyes have conjugated bonds between nitrogen atoms. Among three dyes, it was observed that as conjugation increases, the conductivity also increases. Previous study with polyethylvinylketone and polymethylvinylketone support the idea that increased conjugation will increase the molecular weight and conductivity. For these polymers also, the dopant, phosphorylchloride increased the conductivities due to the double bond being transferred to the main chain and increased conjugation.

Our objective was to compare the incidence of antenatal and intra

Our objective was to compare the incidence of antenatal and intrapartum complications and perinatal outcomes among women who had delivered >= 5 times (grandmultiparous) with those of women who had delivered 1-4 times (parous).

Method: A retrospective study was conducted in a university hospital. The study population consisted of age-matched 249 grandmultiparous women and 338 parous women, who had delivered between January 2008 and January 2011. Maternal case records were retrieved and analyzed from the labor ward records. Statistical analysis

was done using SPSS version 14.0; chi(2) test was SIS3 mouse used to analyze categorical variables.

Results: The frequencies of hypertensive disorders and gestational diabetes mellitus did not differ between gropus (p>0.05). Obstructed labor, cord prolapse, placenta previa and abruptio placenta were higher in grandmultiparous women. A significantly higher Tipifarnib in vitro rate of cesarean deliveries was observed in the study population. There was no difference in terms of mode of delivery,

prevalence of low and high birthweight (<2.5 and >4 kg) babies, stillbirth, multiple pregnancy and fetal distress.

Conclusions: We did not observe an increased incidence of perinatal complications in grandmultiparous women.”
“Objectives: To discuss the clinical subtypes, pathogenesis, pathology, diagnostic evaluation, treatment options, and prognosis of pulmonary hypertension in systemic sclerosis (SSc-PH) and highlight its fundamental differences from idiopathic pulmonary arterial hypertension (IPAH).

Methods: A Medline search for articles published between January 1969 and June 2010 was conducted using the following keywords: scleroderma, systemic sclerosis, pulmonary hypertension, pulmonary

arterial hypertension, pulmonary veno-occlusive disease, pathogenesis, pathology, investigation, treatment, and prognosis. The essential differences from IPAH in pathogenesis and histopathologic findings were highlighted and the limitations of some of the investigations used were emphasized. The differences in response to currently accepted therapy and prognosis were also reviewed.

Results: In scleroderma, pulmonary hypertension can be present in isolation or along with interstitial lung disease and left selleck screening library heart disease. In SSc-PH, the unique histopathologic findings in the lungs include intimal fibrosis, absence of plexiform lesions, and a high prevalence of pulmonary veno-occlusive disease-like lesions. Both “”6-minute walk test”" and NT-proBNP have their limitations in the evaluation of SSc-PH. For treatment, calcium channel blockers are ineffective and anticoagulation should be used with caution. Currently approved therapies are not as effective and prognosis is much worse in SSc-PH compared with IPAH.

Conclusions: SSc-PH is a complex condition with poorer response to therapy and worse outcome compared with that of IPAH. Recent findings have shed some light about the pathophysiology and pathogenesis of SSc-PH.

Quercetin protected cells from oxidative stress-induced cell deat

Quercetin protected cells from oxidative stress-induced cell death, whereas biochanin

check details A had no statistically significant protective effects. Quercetin reduced the expression of cytokines IL-6 and IL-1 beta in cells treated with H(2)O(2), and expression levels of Nrf2 and HO-1 were increased by quercetin treatment suggesting protective function against oxidative stress. Our data indicate that quercetin may protect cells by inhibiting the production of pro-inflammatory factors such as IL-6, and by inducing the expression of ROS-catalyzing phase II proteins such as HO-1. Therefore, plant extracts rich in flavonol quercetin may be an interesting resource for functional food products and other foods targeted for reduced risks of age-related macular degeneration. (C) 2010 Elsevier Ltd. All rights reserved.”
“To explore the mechanism underlying the development of learning deficits in patients with epilepsy, we generated a mouse model for temporal lobe epilepsy by intraperitoneally injecting mice with pilocarpine with lithium chloride, and investigated time-dependent changes in both contextual fear memory

of those model mice and long-term potentiation (LTP) in hippocampal CA1 neurons 1 day, 2 weeks, and 6 weeks after the onset of status epilepticus (SE). Fear memory formation did not change 1 day and 2 weeks after the onset of SE, but was significantly reduced after 6 weeks. Induction of LIP was enhanced 1 day after the HM781-36B onset of SE, but returned to the normal level 2 weeks later, and was almost completely

attenuated after 6 weeks. The enhancement of LIP was accompanied by an increase in output responses of excitatory postsynaptic potentials, whereas suppression of LIP was accompanied by alteration of the ratio of paired pulse facilitation. These results indicate that time-dependent changes of LIP induction have a causal role in the development of learning deficits of epilepsy patients. (C) 2010 Elsevier Inc. All rights reserved.”
“A series of 3′,4′-dihydroxy natural aurones differing in ring A substitution pattern have been studied with regards to their radical scavenging Selonsertib manufacturer potential in the gas and in the liquid phase (benzene, water) using density functional theory (OFT) and the Becke’s 3 Lee Yang Parr functional (B3LYP). Based on O-H bond dissociation enthalpy (BDE) and adiabatic ionization potential (IP) values, all tested aurones are expected to be more efficient hydrogen atom and electron donors than luteolin. The substitution pattern in ring A may have an impact on hydrogen atom donating activity of the compounds as phenolic and non-phenolic hydrogen atoms may be donated. Substitution affected polarity and in certain cases planarity of compounds, which may influence efficiency in real systems.


“Biotransformation of grandiflorenic acid by permeabilised


“Biotransformation of grandiflorenic acid by permeabilised

fungus Fusarium graminearum to yield its hydroxylation derivative, 12 alpha-hydroxygrandiflorenic acid, was studied. The biotransformed product was isolated by column chromatography and its structure VX-809 purchase was determined by mass spectrum and nuclear magnetic resonance analysis. Grandiflorenic acid was efficiently metabolised by the fungus. After 72h, the substrate was almost completely converted into the product.”
“Magnetic properties of Ni(3)C nanoparticles, about 40 nm in diameter, have been investigated. The sample exhibits weak ferromagnetic (FM), spin-glass (SG), and paramagnetic (PM) properties by alternating current susceptibility and direct current magnetization measurements. The freezing temperature of the SG phase at zero applied field is determined as T(F)(0) similar to 11.0 K. At T > T(F)(0), a very weak ferromagnetism has been observed over a strong PM background. The Curie temperature T(C) is shown to exceed 300 K, and the ferromagnetism at 300 K is determined

as about 0.02 emu/g similar to 6.7 x 10(-4) mu(B) per Ni(3)C formula unit. An anomalous dip appears in the temperature dependent coercivity H(C)(T) near the freezing temperature T(F)(0). It reflects the distortedly reduced coercivity in the M(H) hysteresis loop measured at T similar to T(F)(0) with the applied sweeping field approaching H = 0. This is attributable to the interaction between the SG and the weak PD-1/PD-L1 Inhibitor 3 cost FM phases. The possible origin of the magnetic moments that account for the observed FM, SG, and PM properties is discussed. (c) 2009 American Institute of Physics. [DOI: 10.1063/1.3155997]“
“One new imidazole

derivative alkaloid pelopuradazole (1), together with three known alkaloids click here as in 3H-imidazole-4-carboxylic acid (2), 1H-pyrrole-2-carboxylic acid (3) and 2-methyl-3H-imidazole-4-carboxylic acid (4) and two known cyclo-dipeptides pelopurin A (5) and pelopurin B (6), has been isolated from the marine bacterium Pelomonas puraquae sp. nov. Pelopuradazole (1) was a new imidazole derivative alkaloid, while compounds 2, 3, 5 and 6 were firstly obtained as natural products. Compounds 1-6 were isolated from P. puraquae sp. nov. for the first time.”
“The electronic band structures and optical gains of InAs1-xNx/GaAs pyramid quantum dots (QDs) are calculated using the ten-band k . p model and the valence force field method. The optical gains are calculated using the zero-dimensional optical gain formula with taking into consideration of both homogeneous and inhomogeneous broadenings due to the size fluctuation of quantum dots which follows a normal distribution.