Sarleen

Chemist, Researcher

mark as hired

Overview

Looking for part-time work (5 hours/day)

at $11.65/hour ($1,400.00/month)

Post-graduate degree (Masters, Doctorate, etc.)

Last Active

June 27th, 2026 (2 days ago)

Member Since

August 13th, 2021

Profile Description

I'm Sarleen G. Castro, and I am a PhD student at Chiba University, Chiba, Japan. My research interests primarily focus on the isolation and identification of natural products from plants and fungi, as well as study their potential pharmacological applications. I am expected to graduate by September 2026.

I earned BS and MS degrees in Chemistry at the University of Santo Tomas, Manila, Philippines, and subsequently passed the Chemistry Licensure Board Exams in 2016. My MS research focused on isolating compounds from endolichenic fungi, which has remarkable potential. (Tan et al., 3 Biotech, 2020, 10(5):212. doi: 10.1007/s ---------- ).

My work experience includes being a research assistant at the University of Santo Tomas, where I developed chromatographic techniques to isolate compounds and practiced my structure elucidation skills using spectroscopic methods, specifically NMR, to identify these compounds. I was also trained to handle and conduct biological assay (disk diffusion and microplate-based antibacterial assays).

I have also worked at the Philippine Nuclear Research Institute (~3.5 years) as an S&T researcher under the DOST-SEI Career-Incentive Program. We primarily developed methods for detecting and monitoring saxitoxin levels in contaminated shellfish/mussels for seafood safety management. We conducted bioassays (radioligand-receptor binding assay) that employ the use of radioisotopes, and as such, I have been certified in handling radioisotopes and radiation safety (for sealed devices in industrial settings). It was also at PNRI that I improved my skills in using analytical equipment (LCMS, HPLC, AAS), software programs (GraphPad Prism, Microsoft Office), and managing multiple projects with simultaneous deadlines.

In addition to my technical skills, I am a native speaker of both English and Tagalog, with proficiency in Filipino/American Sign Language. I am currently studying N4-level Japanese, intending to someday speak it fluently.

I am now seeking long-term opportunities to contribute my skills and knowledge in the pharmaceutical or chemical research fields while continuing to grow professionally.

Top Skills

Office and Administration » Transcription

Experience: Less than 6 months

Office and Administration » Translation

Customer Support » Phone Support » English Speaking

Experience: Less than 6 months

Other Skills

Office and Administration » Data Entry

Office and Administration » Travel Planning

Patent Drafting

Experience: 2 - 5 years

I conducted patentability analysis and drafted patent reports for Themebuilder's Inc.'s Polyte in partnership with the Villanueva-Tiansay-Darvin VTD Law office. After 2 years of submitting to IPOPHL, we have successfully filed for the utility model application for Polyte.

E-Commerce » Inventory Management » Quality Control

Basic Information

Age: 33

Gender: Female

Website: Sign Up with Pro Account to View

Address

Tests Taken: English
C2(Advanced/Mastery)

Government ID: Sign Up with Pro Account to View

“I had this VA that I could turn things over to made it a lot easier”

Kyle Mckenna

SEE MORE REAL RESULTS

“The more I stepped away from it, the more successful our Chanel became!”

- Jim Orr

see more real results

BENCHMARKS

Loading Time: Base Classes	0.0008
Controller Execution Time ( Jobseekers / Info )	0.0310
Total Execution Time	0.0325

GET DATA

No GET data exists

MEMORY USAGE

1,628,744 bytes

POST DATA

No POST data exists

URI STRING

jobseekers/info/1716221

CLASS/METHOD

jobseekers/info

DATABASE: onlinejobs (Jobseekers:$db) QUERIES: 29 (0.0199 seconds) (Show)

0.0004	`SELECT * FROM exrates WHERE rate_name = 'USD-PHP'`
0.0004	SELECT * FROM `jobseekers` WHERE `jobseeker_id` = '1716221' LIMIT 1
0.0035	SELECT * FROM `jobseeker_meta` WHERE `jobseeker_id` = '1716221'
0.0011	SELECT `j`., `jj`. FROM `jobseekers` `j` INNER JOIN `jobseekers_jobdata` `jj` ON `j`.`jobseeker_id` = `jj`.`jobseeker_id` WHERE `j`.`jobseeker_id` = '1716221'
0.0002	SELECT * FROM `jobseekers_trust` WHERE `jobseeker_id` IS NULL
0.0004	SELECT * FROM `jobseekers` WHERE `jobseeker_id` = '1716221' AND `is_private` = 1
0.0009	`SELECT * FROM employment WHERE jobseeker_id = '1716221' AND hired > -1`
0.0008	SELECT `employers`.`contact_name`, `employer_comment`.`employer_comment_id`, `employer_comment`.`employer_id`, `employer_comment`.`jobseekers_id`, `employer_comment`.`employer_date`, `employer_comment`.`employer_comment`, `employer_comment`.`lastmodified`, `employer_comment`.`comment_status` FROM `employers` LEFT JOIN `employer_comment` ON `employer_comment`.`employer_id` = `employers`.`employer_id` WHERE `employer_comment`.`jobseekers_id` = '1716221' AND `employers`.`deactivate` = 0 AND `employer_comment`.`comment_status` = 'ACTIVE' ORDER BY `employer_comment_id` DESC
0.0002	`SELECT * FROM skill_categories ORDER BY cat_order ASC`
0.0004	`SELECT * FROM skill_subcategories ORDER BY subcategory ASC`
0.0003	`SELECT * FROM jobseekers_jobdata WHERE jobseeker_id = 1716221 LIMIT 1`
0.0013	`SELECT * FROM jobseekers_skills WHERE jobseeker_id = 1716221 LIMIT 1`
0.0007	`SELECT * FROM jobseekers j, jobseekers_jobdata jj,jobseekers_skills js WHERE j.jobseeker_id = '1716221' AND j.jobseeker_id = jj.jobseeker_id AND jj.jobseeker_id = js.jobseeker_id`
0.0003	`SELECT *, DATEDIFF('2026-06-29', rebill_date) AS duration_rebill FROM employers WHERE employer_id = '0'`
0.0002	`SELECT * FROM employer_comment WHERE employer_id = ''`
0.0011	SELECT `facebook`, `manual_fb_score` FROM `jobseekers_trust` WHERE `jobseeker_id` = '1716221'
0.0027	SELECT * FROM `skills_categories` WHERE `is_approved` = 1 ORDER BY `name`
0.0022	SELECT `jsct`., `jsct`.`id` as `jsct_id`, `sct`. FROM `jobseekers_skills_categories` `jsct` LEFT JOIN `skills_categories` `sct` ON `sct`.`id` = `jsct`.`skill_category_id` WHERE `sct`.`is_approved` = 1 AND `jsct`.`jobseeker_id` = '1716221' ORDER BY `jsct`.`rate` DESC
0.0004	SELECT * FROM `jobseekers_trust` WHERE `jobseeker_id` = '1716221'
0.0003	`SELECT user_level, rebill_date, jobseekers_seen, jobseekers_seen_override from employers WHERE employer_id = ''`
0.0004	SELECT * FROM `testimonial_videos` WHERE `placement` = 1 OR `placement` = 0 ORDER BY RAND()
0.0003	SELECT * FROM `testimonial_videos` WHERE `placement` = 2 OR `placement` = 0 ORDER BY RAND()
0.0003	`select * from teasers`
0.0003	SELECT * FROM `employers` WHERE `employer_id` IS NULL LIMIT 1
0.0002	`SELECT user_level, rebill_date, jobseekers_seen, jobseekers_seen_override from employers WHERE employer_id = ''`
0.0002	SELECT * FROM `employers` WHERE `employer_id` IS NULL LIMIT 1
0.0002	`SELECT user_level, rebill_date, jobseekers_seen, jobseekers_seen_override from employers WHERE employer_id = ''`
0.0002	`SELECT user_level, rebill_date, jobseekers_seen, jobseekers_seen_override from employers WHERE employer_id = ''`
0.0002	`SELECT * FROM notes WHERE employer_id = '0'`

HTTP HEADERS (Show)

SESSION DATA (Show)

__ci_last_regenerate	1782726661
last_page	https://v1.stage.onlinejobs.ph/jobseekers/info/1716221
csrf-token	9dbcfb92afdaa28dfb0e4482c7699d72

CONFIG VARIABLES (Show)

base_url	https://v1.stage.onlinejobs.ph
log_threshold	2
enable_profiler
index_page
uri_protocol	PATH_INFO
url_suffix
language	english
charset	UTF-8
enable_hooks	1
subclass_prefix	MY_
composer_autoload	vendor/autoload.php
permitted_uri_chars	a-z 0-9~%.:_\=\-\+\@?\&
enable_query_strings
controller_trigger	c
function_trigger	m
directory_trigger	d
allow_get_array	1
log_path
log_file_extension
log_file_permissions	420
log_date_format	Y-m-d H:i:s
error_views_path
cache_path
cache_query_string
encryption_key	OdBUArjiWg9I7u7bvAwQ7Fu35VB1kzga
sess_driver	files
sess_cookie_name	ci_session
sess_expiration	2678400
sess_save_path
sess_match_ip
sess_time_to_update	300
sess_regenerate_destroy
cookie_prefix
cookie_domain
cookie_path	/
cookie_secure
cookie_httponly
standardize_newlines
global_xss_filtering	1
csrf_protection
csrf_token_name	csrf_test_name
csrf_cookie_name	csrf_cookie_name
csrf_expire	7200
csrf_regenerate	1
csrf_exclude_uris	Array ( )
compress_output
time_reference	local
rewrite_short_tags
proxy_ips
ojadmin	JpjZkQN5A8l@^L
salt	+UFjSAT49tPZLtmU2CIG2FYN7pRhgsWyLHgSyQa6k3I=
queue_enabled
twilio	Array ( [sid] => AC00c0594045c6eef9407e8fff01f3d467 [token] => f0bfc0b73444a077894a43f5f75e6d41 [length] => 6 [from] => +639221200200 [code_expiry_seconds] => 14400 )
maintenance	Array ( [admin] => Array ( [verification] => ) [announcement_bar] => Array ( [show_slow_issue_message] => ) )
trustpilot	Array ( [to_email] => onlinejobs.ph+3d844ebf71@invite.trustpilot.com )
services	Array ( [google_tag_manager] => Array ( [id] => GTM-T5CQMS6P ) [chatgpt] => Array ( [secret] => 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 ) [claude] => Array ( [secret] => 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 ) )
v2_url	https://v2.onlinejobs.ph
v2	Array ( [enabled] => 1 [url] => https://v2.stage.app.onlinejobs.ph [api_url] => https://v2.stage.api.onlinejobs.ph [cookie_domain] => .onlinejobs.ph [paths] => Array ( [myaccount] => 1 ) )
replacemyself_secret_key	Kk1WpgTMkc4wBQOqC5rqCssdLhACKrsJeTtO1ywUkT4=
app	Array ( [app] => Array ( [command] => Array ( [map] => Array ( [OnlineJobs\Mailer\Command\SendEmailCommand] => OnlineJobs\Mailer\Handler\SendEmailHandler [OnlineJobs\Mail\Command\SendEmailCommand] => OnlineJobs\Mail\Handler\SendEmailHandler [OnlineJobs\Mail\Command\QueueEmailPendingCommand] => OnlineJobs\Mail\Handler\QueueEmailPendingHandler [OnlineJobs\Mail\Command\QueueJobEmailPendingCommand] => OnlineJobs\Mail\Handler\QueueJobEmailPendingHandler [OnlineJobs\Mail\Command\QueueUnapprovedEmailCommand] => OnlineJobs\Mail\Handler\QueueUnapprovedEmailHandler [OnlineJobs\Mail\Command\ProcessEmailQueueCommand] => OnlineJobs\Mail\Handler\ProcessEmailQueueHandler [OnlineJobs\Mail\Command\PutJobseekerEmailOnHoldCommand] => OnlineJobs\Mail\Handler\PutJobseekerEmailOnHoldHandler [OnlineJobs\Purchase\Command\RealEstateVaCourseCommand] => OnlineJobs\Purchase\Handler\RealEstateVaCourseHandler [OnlineJobs\Test\Command\HelloCommand] => OnlineJobs\Test\Handler\HelloHandler ) [middleware] => Array ( ) ) [providers] => Array ( [0] => OnlineJobs\Bus\BusServiceProvider [1] => OnlineJobs\Database\DbServiceProvider [2] => OnlineJobs\Mailer\MailerServiceProvider [3] => OnlineJobs\Support\SupportServiceProvider [4] => OnlineJobs\Employer\ServiceProvider [5] => OnlineJobs\Jobseeker\ServiceProvider [6] => OnlineJobs\Mail\ServiceProvider [7] => OnlineJobs\Postal\ServiceProvider [8] => OnlineJobs\Queue\ServiceProvider [9] => OnlineJobs\Courier\ServiceProvider [10] => OnlineJobs\Job\ServiceProvider [11] => OnlineJobs\Purchase\ServiceProvider ) ) )
meta	Array ( [facebook] => Array ( [input] => 1 [connect] => 2 [timezone] => 3 [url] => 30 [id] => 31 [photo] => 32 [name] => 33 [email] => 34 [review] => 35 ) [trust] => Array ( [government_id] => 4 [utility_bill] => 5 [selfie_photo] => 6 [profile_picture] => 7 [phone_number] => 8 [facebook] => 9 ) [verify] => Array ( [profile_picture] => 10 [government_id] => 11 [selfie_photo] => 12 [utility_bill] => 13 [address] => 14 [name] => 15 [reviewed] => 16 [government_group] => 28 [address_group] => 29 [mobile] => 38 ) [address] => Array ( [complete] => 17 [room_unit_no] => 20 [house_no] => 21 [street] => 22 [subdivision] => 23 [barangay] => 24 [city] => 25 [province] => 26 [postcode] => 27 ) [reviewed] => Array ( [similar_names] => 1 ) [name] => 18 [phone] => 19 [sms_verification_code] => 36 [resend_verification_code] => 37 [address_read] => 39 [first_name] => 100 [middle_name] => 101 [last_name] => 102 [edit] => Array ( [government_id_group] => 40 [address_group] => 41 [mobile_group] => 42 ) [salary_re_entry] => 103 [id_proof_recalibrate] => 104 [email] => 44 [mobile_verification_type] => 45 )
honeypot	Array ( [name_field] => my_name [enabled] => 1 )

HTTP_ACCEPT	/
HTTP_USER_AGENT	Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
HTTP_CONNECTION	Upgrade
SERVER_PORT	80
SERVER_NAME	v1.stage.onlinejobs.ph
REMOTE_ADDR	127.0.0.1
SERVER_SOFTWARE	Apache/2.4.58 (Ubuntu)
HTTP_ACCEPT_LANGUAGE
SCRIPT_NAME	/index.php
REQUEST_METHOD	GET
HTTP_HOST
REMOTE_HOST
CONTENT_TYPE
SERVER_PROTOCOL	HTTP/1.1
QUERY_STRING
HTTP_ACCEPT_ENCODING	gzip, br, zstd, deflate
HTTP_X_FORWARDED_FOR	216.73.217.130
HTTP_DNT