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Canine Pd-L1 Mrna And Protein Expression In Normal Tissues And Common Cancers, Fuengfa Damjamnong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Programmed cell death-ligand 1 (PD-L1), an immune check points molecule, is expressed differently in various tissues and plays an important role in common cancers. The objectives of this study are to investigate the expression of canine PD-L1 mRNA and protein in normal tissues and common cancers and to determine the correlation of PD-L1 expression with histologic grading of the malignant mammary gland tumor (MGT). In the normal tissue, the highest PD-L1 mRNA expression was observed in lymph node (P<0.01). In the cancer tissues, the highest PD-L1 mRNA expression was observed in lymphoma, but not significant (P=0.224). The PD-L1 mRNA expression was higher in benign tumors compared to malignant MGT (P=0.093) but not significant. Immunohistochemistry (IHC) was performed in formalin fixed paraffin embedded tissue of normal and MGT tissue using newly developed anti-canine PD-L1 monoclonal antibody (mAb) (clone 5D2). Immunostaining was detected on epithelial cells, transitional cell, parenchymal cells, alveolar macrophages and immune cells. The immunostaining score of malignant MGTs was higher than benign MGT (P<0.05). The immunostaining score was not significantly different among histological sub-types and histological grades. The lack of correlation between PD-L1 mRNA and protein expression in canine malignant MGTs was observed. In conclusion, this anti-canine PD-L1 mAb could be used as predictive biomarker for canine MGT. This study has fulfilled and expanded a knowledge of the PD-L1 checkpoint molecule in dogs and highlights a potential of PD-L1 antibodies using for immunotherapy in canine MGTs, similar to their application in human tumors.

Comparison On The Effects Of Tiletamine/Zolazepam And Dexmedetomidine With And Without Tramadol Combination Undergoing Calvarial Surgery In Rats., Kaewkarn Manomaya

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aims to evaluate the perioperative anesthetic quality of a dexmedetomidine and tiletamine/zolazepam combination with or without tramadol during rat calvarial surgery. The study employed adult male Wistar rats (Rattus norvegicus), intraperitoneal (IP) administered with a combination of dexmedetomidine (0.1 mg/kg) and tiletamine/zolazepam (25 mg/kg) - referred to as the DZ group, or the addition of tramadol (12.5 mg/kg) - referred to as the DZT group. The procedures have been approved by the Institutional Animal Care Committee, Chulalongkorn University Laboratory Animal Center. The key parameters for anesthetic quality assessment were anesthetic achievement, the onset of induction, and the onset …

การประเมินผลกระทบต่อสุขภาพ และต้นทุนทางสุขภาพที่เกิดจากฝุ่นละอองขนาดเล็กจากการขนส่งผู้โดยสารในเขตกรุงเทพมหานคร และปริมณฑล, ภัสราภา ฉลองกลาง

Chulalongkorn University Theses and Dissertations (Chula ETD)

ปัจจุบันโลกของเรากำลังเผชิญกับปัญหาฝุ่นละอองขนาดเล็ก ที่ส่งผลกระทบต่อสุขภาพ โดยเป็นปัจจัยหลักที่ทำให้เกิดการเสียชีวิตก่อนวัยอันควรถึง 4.14 ล้านคน โดยติดลำดับ 4 ของโลก และจากรายงานของกรมควบคุมมลพิษ เมื่อปี พ.ศ. 2564 พบว่า พื้นที่กรุงเทพมหานคร มีค่าฝุ่นละอองขนาดเล็ก เกินค่ามาตรฐานถึง 89 วัน แหล่งกำเนิดที่สำคัญของฝุ่นละอองขนาดเล็กในกรุงเทพมหานคร เกิดจากการจราจรขนส่งเป็นหลัก งานวิจัยนี้จึงมีวัตถุประสงค์เพื่อจัดทำบัญชีการระบายมลพิษอากาศ ประเมินผลกระทบต่อสุขภาพ และต้นทุนทางสุขภาพ ที่มาจากการขนส่งผู้โดยสารทางถนน ทางเรือ และทางราง จากการเดินทางของประชาชน โดยการจัดทำบัญชีการระบายมลพิษอากาศ แบ่งเป็น 2 ส่วน คือ 1) การใช้เชื้อเพลิง และ 2) การผลิตเชื้อเพลิง การประเมินผลกระทบต่อสุขภาพ ประเมินในหน่วยปีสุขภาวะที่สูญเสีย และแปลงเป็นต้นทุนทางสุขภาพในหน่วย บาท ผลการศึกษาสรุปได้ดังนี้ ปี พ.ศ. 2565 และ ปี พ.ศ. 2570 พบว่า สถานการณ์ที่ลดการเดินทางประเภทรถยนต์ส่วนบุคคล 30% เปลี่ยนเป็นการเดินทางด้วยรถไฟไฟฟ้า ในปี พ.ศ. 2565 ลดผลกระทบต่อสุขภาพ เท่ากับ 15,202 ปีสูญเสียสุขภาวะ เทียบเป็นต้นทุนทางสุขภาพ ได้เท่ากับ 9,011 ล้านบาท และในปี พ.ศ. 2570 เท่ากับ 17,178 ปีสูญเสียสุขภาวะ เทียบเป็นต้นทุนทางสุขภาพ ได้เท่ากับ 10,883 ล้านบาท ดังนั้น การกำหนดนโยบายในอนาคต ควรสนับสนุนให้มีการใช้ระบบขนส่งสาธารณะที่เป็นรถไฟไฟฟ้า และลดการใช้รถยนต์ส่วนบุคคล

Rate Of Drug-Resistant Streptococcus Pneumoniae In Children With Invasive Pneumococcal Disease: A Decade Review, Thritsawan Thanyapalit, Suvaporn Anugulruengkitt, Watsamon Jantarabenjakul, Tuangtip Theerawit, Nattapong Jitrungruengnij, Thanyawee Puthanakit

Chulalongkorn Medical Journal

Background: Streptococcus pneumoniae is a common causative organism of pneumonia, bacteremia and meningitis in children. Rate of drug-resistant Streptococcus pneumoniae (DRSP) is an important information to guide appropriate empirical antibiotics. Objectives: This study aimed to describe rates of DRSP and clinical outcomes of patients with invasive pneumococcal disease (IPD). Methods: A retrospective study was conducted among pediatric patients with IPD from 2008 -2017. DRSP was defined as National Committee for clinical laboratory standards guidelines 2013. Results: From January 2008 to December 2017, 71 patients with diagnosis of IPD were identified. Median (interquartile range) age was 2 years (2 months - …

Prevalence And Type Of Kras Mutations In Endometrial Endometrioid Carcinoma, Supaporn Suwiwat, Papitchaya Watcharanuruk, Siriwong Lattakanjanang, Anupong Nitiruangjaras, Kobkul Tungsinmunkong

Chulalongkorn Medical Journal

Background: KRAS encodes a small G-protein that involves cell proliferation, differentiation, and survival. Objectives: To determine the prevalence and type of KRAS mutations in Southern Thai patients with endometrial endometrioid carcinoma as well as their correlation with clinicopathological variables. Methods: A total of 190 patients with endometrioid carcinoma were analyzed for KRAS exon 2 mutations using direct sequencing. The statistical correlation of KRAS mutations with clinicopathogical variables was also evaluated using the Chi-square or Fisher exact test. Results: KRAS mutations were detected in 17.4% (33/190) of cases. All of them were missense mutations and 72.7% (24/33) occurred in hotspot codons …

Political Economy Of Cannabis In Thailand, Mano Laohavanich

Chulalongkorn Medical Journal

Cannabis has been classified as category 5 addictive herb. However, the new tread of the world has found it useful resulting a change of policy by the Ministry of Public health in Thailand, i.e., to follow the California Model that allows cannabis to be grown no more than seven in a household. This review article aimed to explore the origin of policy on cannabis of the current government of Thailand, especially under the new Minister of Public Health, its applications, obstacles and plausible solutions and the policy suggestion for deregulation of cannabis. Literature reviews were conducted on history of cannabis, …

Game Addiction And Severity Of Adhd Symptoms Among Adolescent Adhd Patients, Nuttawut Suksamai, Napakkawat Buathong, Sasithorn Preechawuttidach

Chulalongkorn Medical Journal

Background: Children and adolescents who use the Internet and play games are at risk for the Internet and game addiction because they are still developing and learning new things. Problematic game players are more likely to have attention-deficit hyper activity disorder (ADHD) compared with the general population. The data about game addiction in Adolescents with ADHD in Thailand are still limited. Objectives: To examine the prevalence of game addiction and its association with the severity of ADHD symptoms and other factors in adolescent ADHD patients attending the Child and Adolescents Outpatient Psychiatric Clinic, King Chulalongkorn Memorial Hospital. Methods: This cross-sectional …

Spiritual Perspectives Of Thai Psychiatrists On Mental Health, Vasin Kosolsak, Buranee Kanchanatawan

Chulalongkorn Medical Journal

Background: Although the positive impact of spirituality on mental health has become more widely accepted in the past decade, it is a challenging subject due to its distinctive nature between beliefs and cultures. Objectives: This study aimed to define the term spirituality and its influence on mental health based on the viewpoint of Thai psychiatrists. Methods: This qualitative research was conducted in 20 Thai psychiatrists recruited from all regions across Thailand using a semi-structured in-depth interview, based on literature reviews. The collected data were analyzed via content analysis. Results: We found that Thai psychiatrists define spirituality as a belief, reliance, …

Diagnostic Accuracy Of Dual-Energy Ct To Determine Urinary Tract Stone Composition: Differentiating Between Uric Acid And Non-Uric Acid Urinary Tract Stone, Pawanaporn Rojanavijitkul, Pattama Tantigate, Supoj Ratchanon, Manint Usawachintachit, Krit Pongpirul, Bundit Chaopathomkul

Chulalongkorn Medical Journal

Background: The urinary tract stone is a worldwide condition with various clinical significances. Optimal treatment requires multiple considerations including stone composition. Dual-energy computed tomography (DECT) has been used to determine uric acid and non-uric acid urinary tract stones. Objective: To evaluate the diagnostic accuracy of rapid-kilovoltage (kV) switching DECT in differentiating between uric acid and non-uric acid stones compared with reference standard infrared spectroscopy (IRS). Methods: A prospective study enrolled patients from February 2018 to March 2020 who underwent a DECT scan for urinary tract stone with 3-mm stone (s). Post-processed material-density (MD) images were used to differentiate between uric …

Surgical Aspects Of Adrenal Tumors In Children, Sirima Liukitithara, Paisarn Vejchapipat, Katawaetee Decharun, Apirak Santingamkun

Chulalongkorn Medical Journal

Background: Adrenal tumors are uncommon in children. They can be divided into 2 categories, namely: adrenomedullary tumor and adrenocortical tumor. Surgical aspects of these conditions receive little attention. Objective: The objective of this study was to describe clinical data, operative findings, and operative complications in children with adrenal tumors. Methods: Patients, aged 0 - 15 years, undergoing adrenalectomy between January 2007 and December 2016 were retrospectively reviewed. Results: Thirty-seven patients underwent adrenalectomies. Male to female ratio was 1.31 to 1. Median age of the patients was 44 months (range, 2 months-14 years). Pathological examination revealed 27 adrenomedullary tumors (19 neuroblastomas, …

Quality Of Sleep In Stroke Patients At Phramongkutklao Hospital, Jirat Lothaka, Chavit Tunvirachaisakul, Naratorn Soponprapakorn

Chulalongkorn Medical Journal

Background: Stroke is one of the leading causes of death and serious long-term disability worldwide. A common consequence of stroke is reduced quality of sleep. Objective: To study the quality of sleep in patients with stroke, related factors and the compatibility of wearable tracker device for collecting sleep data. Methods: This cross-sectional study included 66 subjects with stroke at Phramongkutklao Hospital using questionnaires including demographic questions, sleep quality assessment (PSQI), and the satisfaction of Wearable tracker tool assessments. Each subject received a wearable tracker to examine the sleep quality. Results: According to the PSQI assessment, the majority of subjects had …

Validity And Reliability Of The Thai-Version Of Post Stroke Depression Scale (Psds-T), Kuankidnuttha Arunsri, Aurauma Chutinet, Sookjareon Tangwongchai

Chulalongkorn Medical Journal

Background: Currently, there has been limited effective and practical instruments for screening post-stroke depression (PSD) in Thailand. In 2014, Post-Stroke Depression Scale (PSDS) has been testified to be a valid and reliable self-rated questionnaire for evaluating Chinese patients with PSD. Objective: This study proposed to validate the Thai version of PSDS (PSDS-T) in Thai patients with acute ischemic stroke. Methods: The PSDS was translated into Thai language (PSDS-T). The validity and reliability were tested in 145 acute ischemic stroke patients. Subjects were consecutively recruited to complete PSDS-T; they were clinically evaluated for PSD using DSM-5 diagnosis of adjustment disorder with …

Comparative Accuracy Of Unenhanced And Iv-Contrast Enhanced Mdct In Detection Of Acute Appendicitis In Adult Patients, Sirivipa Charuswattanakul, Thitinan Chulroek

Chulalongkorn Medical Journal

Background: Computed tomography (CT) is the preferred imaging modality for suspected acute appendicitis. However, optimal CT technique remains controversial. Objectives: To compare the diagnostic accuracy of unenhanced CT with standard IV-contrast enhanced CT in the diagnosis of acute appendicitis in adult patients and whether body mass index (BMI) affects the diagnosis. Methods: A total of 209 patients (70 males and 139 females) with clinically suspected acute appendicitis underwent both unenhanced and IV-contrast enhanced CT with rectal contrast administration. We retrospectively reviewed radiographic findings of appendicitis, appendiceal visualization, likelihood of appendicitis and alternative diagnoses. Receiver operating characteristic (ROC) analysis, unpaired t …

Correlation Between Leg Length Discrepancy And Asymptomatic Sacroiliac Joint Dysfunction In Young Males, Taweewat Wiangkham, Pattamaporn Rinrit, Mananya Choprateep, Ralita Thamrongthanakul, Weerapong Chidnok

Chulalongkorn Medical Journal

Background: Sacroiliac joint dysfunction (SJD) is an important cause of low back pain (LBP), commonly overlooked. Although the association of leg length discrepancy (LLD) and LBP was established, no study has examined the association between LLD and asymptomatic SJD (ASJD). Objective: To examine the correlation between LLD and ASJD in young males. Methods: One hundred subjects wearing a comfortable and thin uniform were randomized into three rooms (consisting of leg length measurement, palpation and special test rooms). One high valid and reliable assessor was allocated in each room. All subjects were assessed three times (one time a room and then …

Relationships Between Activities Of Daily Living Capabilities, Family Support, And Quality Of Life And Mental Health In The Elderly In Laplae District, Uttaradit Province, Tanyarat Jeenheng, Siriluck Suppapitiporn

Chulalongkorn Medical Journal

Background: Due to the sociocultural context of Laplae District, Uttaradit Province as the example district of long-term care services for dependent elderly project. To improve public health, quality of life and mental health of elderly in this district would be interesting and useful. Objective: To explore the abilities of activities of daily living (ADL), the family support, the quality of life, and the mental health of the elderly and relationships among them. Methods: This cross-sectional study with participation of 381 elderly used structured questionnaires included demographic questions, ADL assessment (Barthel of Activities of Daily Living: ADL), family support and quality …

Stress And Associated Factors Of Caregivers Of Elderly Medical Inpatients At King Chulalongkorn Memorial Hospital, Rattanaporn Chumnisart, Chavit Tunvirachaisakul

Chulalongkorn Medical Journal

Background: Parallel with the increasing number for elderlies, the need of care when they were acutely ill has multiplied, with caregivers being tasked from the beginning to the end of the illness. A family member was often a primary person to take care of the elderly. This role might affect their mental health and quality of life. Objective: To explore the progression of stress and the associated factors among caregivers of the elderlies admitted with acute illness. Methods: This longitudinal descriptive study examined various factors associated with caregivers of the elderlies who were admitted to the medical wards of King …

Cpap Acceptance And Adherence In Osa Patients In Lower Northern Region Part Of Thailand, Mantana Prakassajjatham

Chulalongkorn Medical Journal

Background: Continuous positive airway pressure (CPAP) is the mainstay in obstructive sleep apnea (OSA) treatment. Good CPAP adherence reduces many risks of diseases and improves the overall quality of life.

Objective: The purpose of this study was to determine the acceptance and adherence to CPAP therapy among Thai patients with OSA who attend an otorhinolaryngology sleep clinic.

Methods: This retrospective study was conducted at the otorhinolaryngology sleep clinic, Naresuan University Hospital, Thailand between January 2015 and October 2021. The study enrolled all patients over 18 years old with OSA diagnosis. The patients were scheduled for follow-up appointments at least two …

Treatment Of Eyelid Divided Nevus Using Shave And Graft: An Alternative Technique, Suppapong Tirakunwichcha

Chulalongkorn Medical Journal

Divided nevus of the eyelid is an uncommon feature among congenital melanocytic nevi. To report the outcome after treatment of eyelid divided nevus using shave and graft technique. Two cases of small to moderate size divided nevus at the eyelids were demonstrated, one on medial part including upper and lower punctal area and the other on lateral part. Shave and graft were done to alleviate the nevus in one or two-staged of operation. Patients underwent the uneventful operation. Pathologic results found nevus, free surgical margin without malignant transformation. Cosmetic result was satisfactory. In patient with medial divided nevus, no epiphora …

Analysis Of Breast Mri Performed On Patients With Axillary Nodal Metastasis And Negative Mammogram And Ultrasound, Palita Hansakul

Chulalongkorn Medical Journal

Background: Occult breast cancer is a rare type of breast cancer which magnetic resonance imaging (MRI) has an immense role to confirm diagnosis and disclose non-demonstrable finding on initial modality. Objectives: To analyge breast MRI findings in patients with axillary nodal metastasis and negative mammo gram and ultrasound and retrospectively review the initial mammography and second-look ultrasound. Methods: From January 2010 to January 2023, women who diagnosed occult breast cancer by presenting metastatic axillary lymph node on pathological report with negative mammography and ultrasonography, underwent breast MRI to identify occult breast carcinoma. Their breast MRI were retrospectively reviewed. The imaging …

Surviving Festival Disruptions : The Transformation Of The New Life | Performance Cultural Ecosystem In Contemporary Bangkok Due To The 2020 Covid-19 Pandemic, Pornrat Damrhung

Journal of Urban Culture Research

This article examines how COVID-19 disrupted the Life | Performance festival in Bangkok in 2020; focusing on changes in three festival components. Viewing the festival as a cultural ecosystem interrupted by the 2020 novel coronavirus, the article will focus on the disruptions forced on three pieces: Eko Supriyanto’s Urban Movement Laboratory, Gecko Parade’s Lindbergh’s Flight and Pichet Klunchun’s No. 60: Exhibition, Lecture | Demonstration. The pandemic-induced disruptions in these performances highlight several important ways that the COVID-19 pandemic transformed the Life | Performance urban festival. Changes occurred in the timing/scheduling, spacing/location, relationship with audiences/viewers and their mode of performance for …

Chiang Mai’S Intangible Cultural Heritage : Urban Revitalization And Cultural Identity In A Northern Thai City, Alexandra Denes, Ajirapa Pradit

Journal of Urban Culture Research

Founded in 1296 CE, the walled city of Chiang Mai, Thailand was once the capital of the Lanna kingdom. In the sixteenth century, Chiang Mai’s fortunes waned, and it became a tributary state under the Burmese. This was followed by its incorporation into the Thai nation-state in the twentieth century. One outcome of Chiang Mai’s administrative integration into the Thai nation was the erosion of its distinctive cultural identity. Beginning in the 1980s, key local figures began to collaborate with communities and academic institutions to revitalize Chiang Mai’s intangible cultural heritage, including its craft traditions, rituals, textiles, and dance performances. …

City Of The Future Theories : A Diachronic Comparative Study, Gildis Tachir, Ayşe Nilay Evcil

Journal of Urban Culture Research

This paper strives to interpret the future city or the future of the city by searching published articles. To do this, a review of literature had been made and articles from urban planning and architecture perspectives were studied. We collected information on the time-varying indicators that make up the cities of the future. In this study, it is investigated how the problems arise periodically and the indicators in the formation of the city plans of the future. It concludes with some foresights about next fifty years’ city futures of the millennium.

Comparison Of International Classification Of Orofacial Pain (Icop) And Diagnostic Criteria For Temporomandibular Disorders (Dc/Tmd) Algorithms For Diagnosing Myofascial Orofacial Pain, Thi Thu Hang Phung

Chulalongkorn University Theses and Dissertations (Chula ETD)

The International Classification of Orofacial Pain (ICOP) is a new classification system for orofacial pains, which was published in February 2020. However, this clinical diagnostic criteria has not been validated or tested to be reliable for diagnosing myofascial orofacial pain (MOP). This study aimed to determine whether the ICOP diagnostic algorithm can effectively identify MOP when compared with the gold standard, Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) algorithm. This retrospective cross-sectional study constructed the diagnostic algorithm from the ICOP and the DC/TMD criteria. The clinical data of MOP patients was extracted from clinical charts in the Occlusion and Orofacial Pain …

Comparative Effectiveness Of Tongue Exercises On Tongue Strength, Endurance, And Movement In Healthy Young Adults : A Randomized Controlled Trial Study, Janistar Lekvichittada

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background and rationale: Tongue strengthening exercise (TSE) is a program to re-educate the neuromuscular pattern of the tongue muscle to improve tongue posture and swallowing function. Various TSEs have been introduced. However, most studies have been conducted on TSEs focusing on instruments such as tongue blade, Iowa oral performance instrument (IOPI) and JMS tongue pressure measuring device. Only a few have focused on self-tongue strengthening exercises, which has yet to show which method is the best for improving tongue strength, endurance, and movement. Objective: This study aimed to investigate tongue-strengthening exercise methods that had the most significant impact on increasing …

Factors Associated With Unsafe Children's Stool Disposal: An Analysis From 2015-2016 Myanmar Demographic And Health Survey, Naw Lah Say Wah

Chulalongkorn University Theses and Dissertations (Chula ETD)

Introduction: Safe sanitation is essential for preventing the transmission of diarrhoeal diseases and other infections. Sanitation projects and programs targeted at household sanitation have paid little focus to the disposal of children's stools. Due to the common misconception of children’s stool as less infectious, parents improperly manage children's stools for disposal. Unsafe disposal of children's stools has become an unhindered part of public health problems primarily in low and middle-income countries. Objective: To identify the association between children's stool disposal methods and factors associated with unsafe children’s stool disposal methods in Myanmar Method: This study is the cross-sectional secondary data …

Device Ownership, Accessibility, And University Students’ Perceptions Of An Online Foundation English Course In Thailand, Kriengkrai Sakulprasertsri

PASAA

This study explored device ownership and accessibility, and perceptions of Thai university students toward online teaching and learning of a foundation English course during the COVID-19 pandemic. Five hundred and fifty-two university students were randomly selected to complete an online questionnaire, and 20 were randomly selected to participate in semi-structured interviews. The findings of both quantitative and qualitative data analysis are that most university students in the study own a smartphone and iPad with Internet access that enabled them to study the online foundation English course. Students’ perceptions towards online classroom engagement and interaction, online lesson tasks and activities, online …

How Far People Walk During Lunchtime : Comparing Actual And Perceived Walking Distances In The Central Business District Of Bangkok, Thailand, Shusak Janpathompong, Nij Tontisirin, Akinobu Murakami

NAKHARA (Journal of Environmental Design and Planning)

Walking has long been considered a significant factor in wellness. Previous studies have indicated 400-500 meters as a standard of the “acceptable walking distance” as compared to driving or other forms of transportation. However, “acceptable walking distance” and a “distance that one chooses to walk” are two different matters. More importantly, the distance people perceive for a trip can be one of the deciding factors in determining whether they are willing to walk, decide not to walk, or shift to other transportation modes. This research aims to define the optimal walking distances of office workers by measuring the discrepancy between …

Passive And Biophilic Design : Assessment Of The Semi-Open Educational Atrium Buildings In The Tropics, Songpol Atthakorn

NAKHARA (Journal of Environmental Design and Planning)

The contemporary semi-open educational atrium buildings in Southeast Asia are among the most provocative sustainable buildings in tropical architecture. Since the qualities of natural environments inside atriums promote well-being and academic performance, passive and biophilic design strategies are applied to optimize the thermal and visual performances of the buildings. This research aims to assess four selected case studies in Bangkok in order to discover how the atrium elements affect the qualities of the inside natural environmental conditions, and recommend guidelines for semi-open atrium design. The most important natural environment indices are air temperature, radiation, humidity, airspeed, daylight, green area, view …

A Comparative Study Of Tvoc And Hcho Emissions From Various Multilayer Built-In Furniture Components Based On Iso 16000-9:2006 Emission Test Chamber Methods, Thanawadee Saengphet, Chanikarn Yimprayoon

NAKHARA (Journal of Environmental Design and Planning)

Multilayer materials of built-in furniture components emit volatile organic compounds (VOCs) into the indoor environment. Although many green building rating systems have set criteria for indoor environments, typical buildings in Thailand have not implemented these requirements, especially for local furniture. This study aimed to identify the magnitude of VOC emissions and the relationships between these VOC emissions and inner structures, finishing techniques used for built-in components, and the cost of interior built-in furniture built by local contractors. A total of 33 specimens of built-in components normally found in Thailand were prepared and wrapped in plastic before being transported to the …

The Effects Of Design Combinations Of Surface Materials And Plants On Outdoor Thermal Conditions During Summer Around A Single-Detached House : A Numerical Analysis, Pichamon Leetongin, Natthaumporn Inprom, Manat Srivanit, Daranee Jareemit

NAKHARA (Journal of Environmental Design and Planning)

Suburban areas with low-density buildings are subject to only limited shading from adjacent buildings. As a result, these areas have more surface area absorbing more radiation, which has the effect of increasing urban temperatures compared with built-up high-density areas. This study aims to assess the combinations of landscape design, namely the integration of wall-paint colors, used to influence the outdoor thermal conditions around a single house in a housing cluster in suburban Bangkok, Thailand. The investigation used the ENVI-met model to perform diurnal profiles of the air temperature (Ta), relative humidity (RH), direct and diffuse solar radiation, and wind speed …