60 research outputs found
On Kant and Husserl on Transcendental Logic
It is well known that the notion of transcendental logic has a prominent role in both Kant’s and Husserl’s theories of knowledge. The main aim of the present paper is to study the links between formal and transcendental logic in Husserl on the one hand, and the links between general logic and transcendental logic in Kant on the other. There is a debate about the proper relation between transcendental logic and general logic in Kant’s
philosophy. By means of our definition of transcendental logic, mainly drawn from Husserl’s analyses, we will try to offer an appropriate interpretation of Kant’s view
Modeling the spatial distribution of crop cultivated areas at a large regional scale combining system dynamics and a modified Dyna-CLUE: A case from Iran
Agricultural land use pattern is affected by many factors at different scales and effects that are separated by time and space. This will lead to simulation models that optimize or project the cropping pattern changes and incorporate complexities in terms of details and dynamics. Combining System Dynamics (SD) and a modified Conversion of Land Use and its Effects (CLUE) modelling framework, this paper suggests a new dynamic approach for assessing the demand of different crops at country-level and for predicting the spatial distribution of cultivated areas at provincial scale. As example, a case study is presented for Iran, where we have simulated a scenario of future cropping pattern changes during 2015–2040.The results indicated a change in the spatial distribution of cultivated areas during the next years. An increase in the proportion of rice is expected in northern Iran, whereas the proportion of wheat is increasing in the mountainous western areas. Wheat and barley crops are expected to become dominant within the cropping system throughout the country regions
A Comprehensive Review of the Development of Carbohydrate Macromolecules and Copper Oxide Nanocomposite Films in Food Nanopackaging
Background. Food nanopackaging helps maintain food quality against physical, chemical, and storage instability factors. Copper oxide nanoparticles (CuONPs) can improve biopolymers' mechanical features and barrier properties. This will lead to antimicrobial and antioxidant activities in food packaging to extend the shelf life. Scope and Approach. Edible coatings based on carbohydrate biopolymers have improved the quality of packaging. Several studies have addressed the role of carbohydrate biopolymers and incorporated nanoparticles to enhance food packets' quality as active nanopackaging. Combined with nanoparticles, these biopolymers create film coatings with an excellent barrier property against transmissions of gases such as O2 and CO2. Key Findings and Conclusions. This review describes the CuO-biopolymer composites, including chitosan, agar, cellulose, carboxymethylcellulose, cellulose nanowhiskers, carrageenan, alginate, starch, and polylactic acid, as food packaging films. Here, we reviewed different fabrication techniques of CuO biocomposites and the impact of CuONPs on the physical, mechanical, barrier, thermal stability, antioxidant, and antimicrobial properties of carbohydrate-based films
Effect of Ferula persica plant methanol extract on the level of Cox-2 in induced squamous cell carcinoma (SCC) in rat tongue
Background. More than 90% of oral cancers are cases of squamous cell carcinoma. Standard treatment of cancer includes a combination of surgery, chemotherapy and radiotherapy. Each of these treatments, however, brings about certain problems and side effects. Today herbal medicines have become a more preferable option in dealing with health problems or preventing them because they have better compatibility with the body and do not cause undesirable side effects. In this study, the effect of Ferula persica plant methanol extract on Cox-2 levels in SCC induced in rat tongue was evaluated in vivo. Methods. In this experimental study, 75 rats from SD race in the age range of 2.5–3 months were selected and assigned to five groups. In order to induce tongue carcinoma, 4- nitroquinoline 1-oxide (4NQO) powder was used 3 times a week for each rat. Furthermore, Ferula persica extract was given to each group in order to examine Cox-2 changes in the blood. Results. There were significant differences between the Cox-2 levels in the groups receiving the carcinogen only and the other groups. In this group, Cox-2 level was low and in the group receiving Ferula extract (500 mg) along with carcinogen, Cox-2 level was found to be higher than other groups. Conclusion. Ferula persica extract did not decrease serum Cox-2 levels
Electrosprayed Nanoparticles Containing Hydroalcoholic Extract of Echinacea purpurea (L.) Moench Stimulates Immune System by Increasing Inflammatory Factors in Male Wistar Rats
Purpose: Echinacea purpurea (L.) Moench is a member of the Asteraceae family and is traditionally used mainly due to its immunostimulatory properties. Various compounds including alkylamides and chicoric acid were reported as active ingredients of E. purpurea. Here, we aimed to prepare electrosprayed nanoparticles (NPs) containing hydroalcoholic extract of E. purpurea using Eudragit RS100 (EP-Eudragit RS100 NPs) to improve the immunomodulatory effects of the extract. Methods: The EP-Eudragit RS100 NPs with the different extract:polymer ratios and solution concentrations were prepared using the electrospray technique. The size and morphology of the NPs were evaluated using dynamic light scattering (DLS) and field emission-scanning electron microscopy (FE-SEM). To evaluate the immune responses, male Wistar rats were administrated with the prepared EP-Eudragit RS100 NPs and plain extract in the final dose of 30 or 100 mg/kg. The blood samples of the animals were collected and the inflammatory factors and complete blood count (CBC) were investigated. Results: In vivo studies indicated that the plain extract and EP-Eudragit RS100 NPs (100 mg/kg) significantly increased the serum level of tumor necrosis factor-α (TNF-α) and interleukin 1-β (IL1-β) whereas the EP-Eudragit RS100 NPs (30 mg/kg) significantly increased the number of white blood cells (WBCs) compared to the control group. Lymphocytes’ count in all groups was increased significantly compared to the control group (P<0.05) whereas other CBC parameters remained unchanged. Conclusion: The prepared EP-Eudragit RS100 NPs by electrospray technique caused significant reinforcement in the immunostimulatory effects of the extract of E. purpurea
Protective Effect of Fish Oil Supplementation on DNA Damage Induced by Cigarette Smoking
The study examined the influence of fish oil (FO) supplementation on
serum 8-hydroxy-2\u2019-deoxyguanosine (8-OHdG) levels as indicated by
DNA damage markers and total antioxidant capacity (TAC) among male
cigarette smokers. This double-blind, placebo-controlled randomized
study was conducted among healthy cigarette smokers (n=40) who were
part of a larger prospective cohort study. Twenty smokers were randomly
selected to receive FO for 3 months (1 g/day), and another 20 smokers
received a placebo for 3 months; 8-OHdG and TAC levels were measured in
blood samples before and after the intervention. Serum 8-OHdG
significantly decreased (p=0.001) and TAC increased (p<0.001) after
3 months of treatment with FO. Between baseline and endline, the
difference in 8-OHdG significantly correlated with the difference in
TAC among smokers who received FO (r=-0.540, p=0.014). The study
provides evidence that FO supplementation can modify decreased
antioxidants and increased oxidative DNA damage in cigarette smokers
The relationship of vitamin D and calcium level with preeclampsia severity: A case-control study
Background
Vitamin D deficiency is associated with physiologic changes that are similar to pathogenesis of
preeclampsia. Although association of vitamin D and preeclampsia has been studied previously, their
results are not consistent. The aim of this study was to investigate the relationship of serum vitamin D
and calcium with preeclampsia severity.
Materials and Methods: This case- control study was conducted in 75 healthy pregnant women and
74 pregnant women with preeclampsia (46 mild preeclampsia and 28 severe preeclampsia) in Qazvin,
Iran in 2015. Serum vitamin D, calcium, and albumin were measured; corrected calcium was also
calculated. Hypocalcemia and vitamin D deficiency were compared between the groups. Logistic
regression analysis was used to study the independent association of hypocalcemia and
hypovitaminosis D with preeclampsia.
Results
Mean serum vitamin D level was 27.7±15.3, 22.9±15.9, and 27.6±16.6 in normal, mild preeclampsia,
and severe preeclampsia groups (P> 0.05); also vitamin D deficiency was not different between the
groups. Hypocalcemia in severe preeclampsia group was more frequent than normal group (25.9% vs.
6.6%, P: 0.017). Hypocalcemia was associated with severe preeclampsia after adjustment for age,
parity, and calcium supplement consumption (OR: 6.7, 95% CI: 1.45-30.79; P: 0.015).
Conclusion
There was not any association between vitamin D deficiency and preeclampsia in the present study,
however low corrected serum calcium was associated with about six times increased risk of sever
preeclampsia. More studies are needed to determine the role of hypocalcemia and vitamin D in
preeclampsia.
Key Words: Hypocalcemia, Pre-eclampsia, Pregnancy, Vitamin D deficienc
The effects of natural nano-sized clinoptilolite and Nigella sativa supplementation on serum bone markers in diabetic rats
Introduction: Many studies confirm that diabetes mellitus is associated with higher risks of bone fracture. The beneficial effects of Nigella sativa (NS) and clinoptilolite in preventing/reducing some diabetes-related disorders have been shown. This study was conducted to examine the effects of separate and concurrent supplementation of natural nano-sized clinoptilolite (NCLN) and NS on serum bone markers in rats with type 2 diabetes. Methods: A total of 42 (case=36 and control=6) adult male Wistar rats were divided into 2 groups: diabetic and non-diabetic. An oral glucose tolerance test and a homeostatic model assessment of insulin resistance (HOMA-IR) test were conducted to confirm diabetes. Then, the diabetic group was divided into 4 subgroups: [1] control (n=9), [2] NS 1%/food (n=9), [3] NCLN 2%/food (n=9), [4] NS 1%/food + NCLN 2%/food (n=9). After 7 weeks, serum levels of bone markers were determined using ELISA kits. Results: Analysis showed that serum levels of alkaline phosphatase (ALP) in the NCLN group (1318.6 ± 217.5 U/L) was significantly (P<0.05) higher than other intervented groups. On the other hand, serum levels of calcium in NCLN+NS group (10.8 ± 2.6 mg/dL) were higher (P=0.027) compared to all other study groups. However, rats in the NS group had higher (535.8 ± 49.3 pg/mL) PTH (P<0.0001) compared to other supplementation groups. There were no significant differences in vitamin D and osteoprotegerin. Conclusion: The results of the current study suggest that bone mineralization may be affected by concurrent use of NS and NCLN through influencing calcium circulation. Moreover, dietary NS administration is strongly related to an augmented level of PTH
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