http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Ubaidillah Ubaidillah,Lutfi Musthofa,Darmanto Darmanto,Perdana Lita Puspita R. 한국농업기계학회 2023 바이오시스템공학 Vol.48 No.4
Purpose The hand tractors produce hand-transmitted vibration, a significant occupational hazard for hand tractor operators. The present study aims to characterize the hand-transmitted vibration of hand tractors under various engine rotational speeds (1400 rpm, 1700 rpm, and 2000 rpm) and soil implements (moldboard plow, rotary harrow, and leveler) and develop work-rest schedules for hand tractor operations. Methods The study involved field experiments in soil wet preparation and soil dry preparation operations to measure the vibration acceleration at the handle grip and the operator’s physiological cost of work. The data was then analyzed to obtain the maximum allowable time based on the American Conference of Governmental Industrial Hygienists (ACGIH) limits and the National Institute for Occupational Safety and Health (NIOSH) calculations. Results The results showed that vibration acceleration was significantly affected by engine rotational speed and the soil implement used. The vibration acceleration was highest on the x-axis, followed by the z- and y-axis. The maximum allowable time was 3 h/day/operator and 2.5 h/day/operator and divided into four and five work bouts with 45 min and 30 min each for wet and dry soil preparation, respectively. The heart rate data indicated that at least 15 min of rest should be given in between work bouts, with an additional 30 min and 15 min of free time for each wet and dry soil operation, respectively. Conclusions Based on this research, a work-rest schedule was designed for two hand tractor operators who work alternately to minimize hand-arm vibration syndrome.
Ubaidillah, Mohammad,Safitri, Fika Ayu,Jo, Jun-Hyeon,Lee, Sang-Kyu,Hussain, Adil,Mun, Bong-Gyu,Chung, Il Kyung,Yun, Byung-Wook,Kim, Kyung-Min Springer Berlin Heidelberg 2016 3 Biotech Vol.6 No.2
<P>We previously identified the rice (<I>Oryza sativa</I>) senescence-associated gene <I>OsSAP</I> which encodes a highly conserved protein involved in anti-apoptotic activity. This novel Bax suppressor-related gene regulates tolerance to multiple stresses in yeast. Here, we show the effects of drought stress on leaf and root tissues of plants over-expressing <I>OsSAP</I> in relation to the levels of phytohormones, abscisic acid (ABA), jasmonic acid (JA), indole-3-carboxylic acid (ICA), gibberellic acid (GA<SUB>3</SUB>), and zeatin. Results showed that rice plants over-expressing <I>SAP</I> were tolerant to drought stress compared to wild type and the plants over-expressing <I>AtBI</I>-1, which is a homolog of the human Bax inhibitor-1 in <I>Arabidopsis</I>. ABA and JA levels in <I>OsSAP</I> and <I>AtBI</I>-1 transgenic plants consistently increased up to at least 3 days after drought treatment, whereas lower GA<SUB>3</SUB> levels were recorded during early drought period. Comparison between control and transgenic plants overexpressing anti-apoptosis genes <I>OsSAP</I> and <I>AtBI</I>-1 resulted in different patterns of hormone levels, indicating that these genes are involved in the plant responses to drought stress and present an opportunity for further study on drought stress tolerance in rice and other plant species.</P><P><B>Electronic supplementary material</B></P><P>The online version of this article (doi:10.1007/s13205-016-0564-x) contains supplementary material, which is available to authorized users.</P>
Ubaidillah, Mohammad,Safitri, Fika Ayu,Lee, Sangkyu,Park, Gyu-Hwan,Kim, Kyung-Min The Korean Society of Plant Biotechnology 2015 식물생명공학회지 Vol.42 No.3
We previously identified the rice gene, OsSAP, as an encoder of a highly conserved putative senescence-associated protein that was shown to have anti-apoptotic activity. To confirm the role of OsSAP in inducing abiotic stress tolerance in rice, we introduced OsSAP and AtBI-1, a plant homologue of Bax inhibitor-1, under the control of the CaMV 35S promoter into the rice genome through Agrobacterium-mediated transformation. The OsSAP transformants showed a similar chlorophyll index after salinity treatments with AtBI-1. Furthermore, we compared the effects of salinity stress on leaves and roots by examining the hormone levels of abscisic acid (ABA), jasmonic acid (JA), gibberellic acid (GA3), and zeatin in transformants compared to the control. With the exception of phytohormones, stress-induced changes in hormone levels putatively related to stress tolerance have not been investigated previously. Hormonal level analysis confirmed the lower rate of stress in the transformants compared to the control. The levels of ABA and JA in OsSAP and AtBI-1 transformants were similar, where stress rates increased after one week and decreased after a two week period of drought; there was a slightly higher accumulation compared to the control. However, a similar trend was not observed for the level of zeatin, as the decrease in the level of zeatin accumulation differed in both OsSAP and AtBI-1 transformants for all genotypes during the early period of salinity stress. The GA3 level was detected under normal conditions, but not under salinity stress.
Mohammad Ubaidillah,Fika Ayu Safitri,이상규,박규환,김경민 한국식물생명공학회 2015 식물생명공학회지 Vol.42 No.3
We previously identified the rice gene, OsSAP, as an encoder of a highly conserved putative senescenceassociated protein that was shown to have anti-apoptotic activity. To confirm the role of OsSAP in inducing abiotic stress tolerance in rice, we introduced OsSAP and AtBI-1, a plant homologue of Bax inhibitor-1, under the control of the CaMV 35S promoter into the rice genome through Agrobacterium- mediated transformation. The OsSAP transformants showed a similar chlorophyll index after salinity treatments with AtBI-1. Furthermore, we compared the effects of salinity stress on leaves and roots by examining the hormone levels of abscisic acid (ABA), jasmonic acid (JA), gibberellic acid (GA3), and zeatin in transformants compared to the control. With the exception of phytohormones, stress-induced changes in hormone levels putatively related to stress tolerance have not been investigated previously. Hormonal level analysis confirmed the lower rate of stress in the transformants compared to the control. The levels of ABA and JA in OsSAP and AtBI-1 transformants were similar, where stress rates increased after one week and decreased after a two week period of drought; there was a slightly higher accumulation compared to the control. However, a similar trend was not observed for the level of zeatin, as the decrease in the level of zeatin accumulation differed in both OsSAP and AtBI-1 transformants for all genotypes during the early period of salinity stress. The GA3 level was detected under normal conditions, but not under salinity stress.
Mohammad Ubaidillah,Hyun-Suk Lee,Min-Gyu Kim,Jung-Suk Choi,Gyu-Ho Lee,Jin-Hee Kim,Ye-Jin Son,Kyung-Min Kim 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Environmentally inflicted stress (abiotic stress) such as high drought stress could be limiting the plant productivity. The mechanism of drought stress signaling in plant related with anti-apoptosis has not yet been full described. Understanding drought stress signaling is key to producing drought-tolerant plant. In this study we recently have identified Oryza sativa genes related abiotic stress water deficit. Abiotic stress related genes were screened from Oryza sativa cDNA library and identified gene by yeast functional screening. The yeast expression showed that they east cell grow well on SD-galactose-Leu-Ura-. The screening of over than 7000 clones from Oryza sativa cDNA libraries has been identified. 28 clones that survived following BAX-expression on inducible galactose medium. R12H780 clones confirmed protein prediction like putative senescence-associated-protein. This gene contains an open reading frame (ORF) of 108 amino acids. Transcription of R12H780 was induced in response to drought stresses, RT-PCR analysis showed transcript level in plant strongly detected in earliest time of drought stress treatment. Yeast transformed with R12H780 gene displayed markedly improved tolerance to PEG treatment, and high salinity in comparison to the control yeast (vector only). The results indicate R12H780 expression represents a new type of drought stress related gene with anti-apoptotic in Oryza sativa and endows tolerance to several types abiotic stress.